Journal articles on the topic 'Limitations of tooth movement'
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Aksakalli, S., A. Balaban, K. Nazaroglu, and E. Saglam. "Accelerated Tooth Movement with Orthodontic Mini-Screws." Case Reports in Dentistry 2017 (2017): 1–4. http://dx.doi.org/10.1155/2017/2327591.
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This case report outlines the possibility of accelerated tooth movement with the combination of microosteoperforation and mini-screws. A 14-year-old male patient presented Class II malocclusion with maxillary incisor protrusion. Upper first premolars were extracted, and after leveling, accelerated canine distalization started. For pre- and postdistalization times, amount of distalization, periodontal health, and root resorption were assessed. Within the limitations of this case report, micro-osteoperforations with mini-screw have a potential for shortening the treatment time.
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Hong, Kyungjae, Won-Hyeon Kim, Emmanuel Eghan-Acquah, Jong-Ho Lee, Bu-Kyu Lee, and Bongju Kim. "Efficient Design of a Clear Aligner Attachment to Induce Bodily Tooth Movement in Orthodontic Treatment Using Finite Element Analysis." Materials 14, no. 17 (August 30, 2021): 4926. http://dx.doi.org/10.3390/ma14174926.
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Clear aligner technology has become the preferred choice of orthodontic treatment for malocclusions for most adult patients due to their esthetic appeal and comfortability. However, limitations exist for aligner technology, such as corrections involving complex force systems. Composite attachments on the tooth surface are intended to enable active control of tooth movements. However, unintended tooth movements still occur. In this study, we present an effective attachment design of an attachment that can efficiently induce tooth movement by comparing and analyzing the movement and rotation of teeth between a general attachment and an overhanging attachment. The 3D finite element modes were constructed from CBCT data and used to analyze the distal displacement of the central incisor using 0.5- and 0.75-mm-thick aligners without an attachment, and with general and overhanging attachments. The results show that the aligner with the overhanging attachment can effectively reduce crown tipping and prevent axial rotation for an intended distal displacement of the central incisor. In all models, an aligner with or without attachments was not capable of preventing the lingual inclination of the tooth.
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Khan, Mohamed Imran, and Dikeledi Maureen Gininda. "A radiographic analysis of Mandibular Symphysis dimension in black South African adult patients with differing skeletal patterns." South African Dental Journal 77, no. 04 (June 22, 2022): 208–15. http://dx.doi.org/10.17159/2519-0105/2022/v77no4a3.
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Orthodontic treatment often involves planned tooth movement within the confined spaces of the alveolar bone trough. Tooth movement within the alveolar trough may be limited by thin labial and lingual cortical plates. Moving lower incisors beyond the mandibular symphysis dimensions may result in damage to roots and alveolar bone.4 Aim and objective The aim of the study was to evaluate limitation of treatment in different skeletal patterns due to mandibular symphysis dimension in order to evaluate limitations of tooth movement within the confines of the mandibular alveolar trough.The objective was to determine the mandibular symphysis dimensions in subjects with differing skeletal patterns Design The design was a retrospective, cross-sectional study. Methods A sample of 180 pre-treatment lateral cephalometric radiographs of black South African subjects were stratified into three groups based on their skeletal classification. Each Class was further divided into equal numbers of males and females. Descriptive statistics, Student’s t-test, ANOVA test and Pearson correlation coefficient were used to analyse the data and p-values of <0.05 were considered statistically significant. Results Subjects with skeletal Class I pattern had a greater LA compared to subjects with skeletal Class II pattern. Subjects with skeletal Class I pattern had a greater LH and LA in females than in males. Subjects with skeletal Class III pattern had greater LH in males than in females.
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Pascoal, Selma, Aline Gonçalves, Andreia Brandão, Duarte Rocha, Sofia Oliveira, Francisca Monteiro, Óscar Carvalho, Susana Coimbra, and Teresa Pinho. "Human Interleukin-1β Profile and Self-Reported Pain Monitoring Using Clear Aligners with or without Acceleration Techniques: A Case Report and Investigational Study." International Journal of Dentistry 2022 (August 31, 2022): 1–11. http://dx.doi.org/10.1155/2022/8252696.
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Introduction. There is a growing demand for more aesthetic, comfortable, and faster orthodontic treatments, and clear aligners emerged as a solution to fulfill this need. However, the effectiveness of clear aligners to treat complex malocclusions is yet contentious. The use of acceleration methods could improve the efficacy of clear aligners by stimulating cells' mechanobiology through numerous pathways, but this hypothesis is still poorly explored. Objective. We aimed to monitor the release profile of an inflammatory marker-the interleukin-1β-and to evaluate its relationship with self-reported pain scores with and without the use of acceleration techniques during an orthodontic treatment requiring difficult tooth movements with clear aligners. Case Report. Here, we report a case of a 46-year-old female patient who presented functional and aesthetic complaints. Intraoral examination revealed a diminished overjet and overbite, rotation of teeth 45 and 24, absence of teeth 25, 35, and 36, buccolingual dislocation of tooth 21, a tendency to a Class III malocclusion, and a 2 mm left deviation of the lower midline. This study is divided into three stimulation phases: no stimulation, mechanical vibration stimulation, and photobiomodulation. Interleukin-1β levels in gingival crevicular fluid samples from the pressure side of six selected teeth were evaluated at four time points after the orthodontic treatment onset. Pain monitoring in those teeth was performed using a visual analogue scale at the same time points. Results. Interleukin-1β protein production peaked 24 h after treatment onset. Complex movements were associated with increased self-reported pain. Conclusion. Clear aligners show limitations in solving complex tooth movements, even when combined with acceleration. The development of customized and programmable stimulation microdevices integrated into “smart aligners,” which could be designed to specifically stimulate the direction of movement and stimulation parameters and could constitute a solution to optimize the orthodontic tooth movement with clear aligners.
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Kaklamanos, Eleftherios G., Miltiadis A. Makrygiannakis, and Athanasios E. Athanasiou. "Does medication administration affect the rate of orthodontic tooth movement and root resorption development in humans? A systematic review." European Journal of Orthodontics 42, no. 4 (August 18, 2019): 407–14. http://dx.doi.org/10.1093/ejo/cjz063.
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Summary Background Recently, the potential impact of different medications on the rate of orthodontic tooth movement and the associated root resorption has been systematically reviewed in animal studies and various effects have been shown. However, animal data cannot be extrapolated to human clinical situations directly. Objectives To systematically investigate the most up to date available evidence from controlled human studies regarding the effect of medication administration on the rate of orthodontic tooth movement and associated root resorption development. Search methods We searched eight databases (covering also grey literature) without restrictions and we performed hand searching up until October 2018. Selection criteria Controlled studies in humans assessing the effect of various medications on the rate of orthodontic tooth movement and root resorption development. Data collection and analysis Study selection was followed by data extraction and risk of bias assessment using the ROBINS-I tool for non-randomized and the Cochrane Risk of Bias Tool for randomized studies. Results Eight studies, at various risk of bias, were finally identified. With regard to the rate of orthodontic tooth movement, local injections of prostaglandin E1 were found to exert an increasing effect, whereas systemic intake of nabumetone decreased it. Following tenoxicam administration, drinking water with fluoride or local injections of calcitriol (vitamin D metabolite), no significant effects were demonstrated. Concerning root resorption development, nabumetone administration was shown to reduce it, whereas fluoride, overall, was not observed to exert any effect. Only in individuals subjected to heavy orthodontic forces, did fluoride show a protective effect for the period of force application, but not in the longer term during retention. Conclusions The aforementioned substances may show varying effects on the rate of orthodontic tooth movement and root resorption development in human subjects. Despite the observed limitations, the orthodontist should be able to identify patients taking pharmaceuticals and consider any implications related to orthodontic treatment. Registration PROSPERO (CRD42017078208).
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Liu, Xin, Mao Liu, Bin Wu, Jingjing Liu, Wencheng Tang, and Bin Yan. "Effect of the Maxillary Sinus on Tooth Movement during Orthodontics Based on Biomechanical Responses of Periodontal Ligaments." Applied Sciences 12, no. 10 (May 15, 2022): 4990. http://dx.doi.org/10.3390/app12104990.
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The maxillary sinus is a common anatomic limitation for orthodontic tooth movement. The effect of orthodontic forces on a particular anatomy can be studied using finite element analysis (FEA). Our study aimed to determine the effect of different tooth penetration depths into the maxillary sinus floor (MSF) on the orthodontic force system for bodily tooth movement. Using the cone-beam computed tomography of a patient with low MSF, we modeled the geometry of canine, premolar, and molar teeth with their periodontal ligaments and the alveolar bone surrounding them. The models were manually modified to simulate different root penetration depths. Thereafter, the center of resistance and stress distributions for teeth penetrating into the MS were determined using FEA. Moreover, the force systems for teeth with a low MSF to varying degree were evaluated based on the FEA results. During orthodontic tooth movement, the individual differences in the periodontal anatomy should be considered. The CR position decreases with the penetration depth, while the average hydrostatic stress in the PDL increases rapidly. In this paper, we present the correction coefficients of the orthodontic force and moment for a tooth penetrating into the MSF, which is necessary for personalized treatment planning.
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Francisco, Inês, Maria Helena Fernandes, and Francisco Vale. "Platelet-Rich Fibrin in Bone Regenerative Strategies in Orthodontics: A Systematic Review." Materials 13, no. 8 (April 16, 2020): 1866. http://dx.doi.org/10.3390/ma13081866.
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Preservation of the alveolar bone is a determinant in the outcome of orthodontic treatment. Alveolar bone defects or a decrease of their height and width may occur due to common reasons such as inflammation, tooth extraction, or cleft lip and palate. The aim of this systematic review was to investigate and appraise the quality of the most up to date available evidence regarding the applications and effects of platelet-rich fibrin (PRF) in orthodontics. This study was carried out according to preferred reporting items for systematic reviews and meta-analyses guidelines using the following databases: Medline via PubMed, Cochrane Library, Web of Science Core Collection and EMBASE. The qualitative assessment of the included studies was performed using Cochrane Risk of Bias tool and ROBINS-I guidelines. Results: From a total of 489 studies, nine studies were selected. The majority of the included studies demonstrate that autogenous anterior iliac graft with PRF had a higher amount of newly formed bone. Furthermore, this review also suggests that the application of platelet derivatives in the extraction socket can accelerate orthodontic tooth movement. Despite the limitations in the included studies, this systematic review suggested that PRF can improve alveolar cleft reconstruction and orthodontic tooth movement.
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Reiss, Stacey, Marie Claude Chouinard, Dasha Frias Landa, Ravindra Nanda, Taranpreet Chandhoke, Takanori Sobue, Veerasathpurush Allareddy, Chia-Ling Kuo, Jinjian Mu, and Flavio Uribe. "Biomarkers of orthodontic tooth movement with fixed appliances and vibration appliance therapy: a pilot study." European Journal of Orthodontics 42, no. 4 (June 23, 2020): 378–86. http://dx.doi.org/10.1093/ejo/cjaa026.
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Summary Introduction The aim of this study was to investigate the effect of supplemental vibratory force on biomarkers of bone remodelling during orthodontic tooth movement, the rate of mandibular anterior alignment (RMAA), and compliance with a vibration device. Design, settings, and participants Forty patients between the ages 15–35 undergoing fixed appliance treatment that presented to a university orthodontic clinic were randomly allocated to supplemental use of an intraoral vibrational device (n = 20, AcceleDent®) or fixed appliance only (n = 20). Salivary multiplex assay was completed to analyse the concentration of selected biomarkers of bone remodelling before treatment (T0) and at three following time points (T1, T2, T3), 4–6 weeks apart. Irregularity of the mandibular anterior teeth and compliance was assessed at the same trial time points. Data were analysed blindly on an intention-to-treat basis with descriptive statistics, Mann–Whitney U-test, Wilcoxon signed-rank test, and linear mixed effects regression modelling. Results No difference in the changes in salivary biomarkers of bone remodelling and RMAA between groups at any time point over the trial duration was observed. No correlation was found between changes in irregularity and biomarker level from baseline to another time point. Lastly, there was no association between RMAA and compliance with the AcceleDent® device. Conclusions Supplemental vibratory force during orthodontic treatment with fixed appliances does not affect biomarkers of bone remodelling or the RMAA. Limitations The main limitation of the study was the small sample size and the large variability in the salivary biomarkers. Harms No harms were observed during the duration of the trial. Protocol The protocol was not published prior to trial commencement. Registration The study was registered in Clinical Trials.gov (NCT02119455) first posted on April 2014.
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Acharya, Pujan, Charanjeet Singh Saimbi, Khushbu Adhikari, Bikash Kumar, and Sita Niure. "Expediting the Irksome - the Cortical Approach: A Case report." Journal of Nepalese Society of Periodontology and Oral Implantology 1, no. 1 (June 1, 2017): 34–36. http://dx.doi.org/10.3126/jnspoi.v1i1.23526.
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Corticotomy assisted orthodontic treatment is a promising interdisciplinary approach, which has offered solution to many limitations in the orthodontic therapy. The procedure involves the alveolar decortication in the form of cortical grooves and perforations performed around the teeth that are to be moved. In this case report, a 17 year old male under fixed orthodontic therapy with a complaint of delayed protraction of mandibular second molars underwent corticotomy procedure. The decortication was done followed by elevation of buccal and lingual flaps. After 2 weeks of the surgical procedure, orthodontic tooth movement was initiated.
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Uzuner, F. Deniz, and Nilufer Darendeliler. "Dentoalveolar surgery techniques combined with orthodontic treatment: A literature review." European Journal of Dentistry 07, no. 02 (April 2013): 257–65. http://dx.doi.org/10.4103/1305-7456.110201.
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ABSTRACTSurgery on the dentoalveolar process combined with orthodontic treatment was emphasized as an alternative method for reducing the treatment time and improving the orthodontic treatment on post-adolescent and adult patients. This combined treatment facilitates and accelerates orthodontic tooth movement. This article reviews the clinical practice in surgery-assisted orthodontic treatment in relation to historical perspective, indications and biological principles, as well as limitations and risks of dento-osseous surgical techniques, including dento-osseous osteotomy and/or ostectomy, dento-osseous microfracture, dento-osseous corticotomy, and/or corticoectomy, and dental distraction.
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Kabacinski, Mirosław, and Roland Pawliczek. "Fully Automated System for Air Velocity Profile Measurement." Archive of Mechanical Engineering 59, no. 4 (November 1, 2012): 435–51. http://dx.doi.org/10.2478/v10180-012-0023-0.
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The paper presents the idea of a system for controlling the movement of a flowmeter for air velocity profile measurement. In such a system, due to massive amount of data and limitations of the Data Acquisition Equipment, it is necessary to use moveable sensors. The flowmeter sensor is moved with the use of a linear module with a stepper motor and a tooth-belt drive. The location and speed of the sensor are controlled by a program based on the idea of virtual instrument. The proposed structure allows the user to control operation of the stand and provides automatic measurement. A wide range of velocity and step increments of the stepper motor drive, and flexibility of the virtual instrument software, allow one to create effective measurement systems ensuring sufficiently precise location with optimal time duration of measurement. It is shown that the linear module with tooth-belt is an effective alternative for similar modules with micro-screw drives.
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Jain, Abhay Kumar, Sonahita Agarwal, and Faiz Warsi. "Simultaneous torquing, aligning and retraction spring: A three-dimensional approach for blocked out canines." APOS Trends in Orthodontics 6 (July 15, 2016): 232–34. http://dx.doi.org/10.4103/2321-1407.186440.
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Orthodontic management of a buccally blocked-out canine requires a substantial amount of bodily movement, which is difficult to perform because of its long and bulbous root. Even when orthodontic forces are applied in a desired direction, large hyalinized areas are created which impede the root movement. Palatal root torque is needed for the canine to increase the buccal bone thickness, decrease the risk of bone dehiscence and gingival recession. Closing loops generate a distal force along with an extrusive component which retracts the canine into the extraction space but lacks control on the torque of the canine. To overcome this limitation, this simultaneous torquing, aligning, and retraction spring was designed. It can be easily fabricated, activated at chairside for either simultaneous or sequential controlled three-dimensional tooth movements.
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Lacerda-Santos, Rogério, Rhaíssa Ferreira Canutto, José Lucas dos Santos Araújo, Fabiola Galbiatti de Carvalho, Eliseu Aldrighi Münchow, Taís de Souza Barbosa, Matheus Melo Pithon, Emanuel Braga Rego, and Leniana Santos Neves. "Effect of Orthodontic Treatment on Tooth Autotransplantation: Systematic Review of Controlled Clinical Trials." European Journal of Dentistry 14, no. 03 (June 15, 2020): 467–82. http://dx.doi.org/10.1055/s-0040-1708329.
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AbstractThis systematic review was focused on evaluating tooth autotransplantation, considering its impacts on the teeth, bone, soft tissues, and aesthetics in orthodontic patients. A bibliographic search was conducted without limitations on year of publication or language in the databases of PubMed, Web of Science, Scopus, Medline Complete, Cochrane, Clinical Trials, and Trials Central. For triage of articles, indications, surgical planning, orthodontic movement, risk factors for treatment, and long-term follow-ups were considered. For outcomes, the results with reference to teeth, alveolar bone, periodontal tissues, and esthetic satisfaction were considered. Risk of bias was evaluated using the methodological index for nonrandomized studies-MINORS. The results showed 10 controlled clinical trials, and no randomized clinical trials were found. The selected studies included 715 patients and 934 autotransplanted teeth among which there were premolars, molars, and anterior teeth evaluated in the long term, indicating that orthodontics associated with autotransplantation indicated a result that was generally clinically acceptable. The quality of the set of evidence was considered medium due to the presence of different methodological problems, risk of bias, and significant heterogeneity in the evaluated studies. There was a sufficient body of evidence that justified autotransplantation in patients who needed orthodontic movement. In teeth, there was an increase in root resorption influenced by orthodontics, but without impacting on the general clinical result in the long term. Bone and periodontal tissue do not appear to be affected by orthodontics. The patient’s aesthetic satisfaction was not considered in the studies.
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Capps, Chad J., Phillip M. Campbell, Byron Benson, and Peter H. Buschang. "Can posterior teeth of patients be translated buccally, and does bone form on the buccal surface in response?" Angle Orthodontist 86, no. 4 (December 14, 2015): 527–34. http://dx.doi.org/10.2319/072015-491.1.
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ABSTRACT Objective: To produce buccal translation and determine whether buccal bone forms on the cortical surfaces. Materials and Methods: Eleven patients requiring maxillary first premolar extractions participated in this prospective, randomized, split-mouth study. Pre- and posttreatment records included models, photographs, and small field of view CBCT images. One randomly chosen maxillary first premolar was moved buccally with 50 g of force applied approximately at the tooth’s center of resistance. The other premolar served as the control. Forces were re-activated every 3 weeks for approximately 9 weeks, after which the teeth were held in place for 3 weeks. Pre- and posttreatment records were analyzed and superimposed to evaluate changes in the dental-alveolar complex. Results: There was significant (P < .05) movement of the experimental premolar with minimal buccal tipping (2.2°). Changes in maximum bone height were bimodal, with 6 patients showing 0.42 mm and 5 patients showing 8.3 mm of vertical bone loss. Buccal bone thickness 3 mm apical to the CEJ decreased 0.63 mm. Direct measurements and CBCT superimpositions showed that buccal bone over the roots grew 0.46 mm and 0.51 mm, respectively. Conclusions: It is possible to produce buccal bodily tooth movement with only limited amounts of tipping. Such movements are capable of producing buccal bone apposition, but there are potential limitations.
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Lyu, Chunxiao, Li Zhang, and Shujuan Zou. "The effectiveness of supplemental vibrational force on enhancing orthodontic treatment. A systematic review." European Journal of Orthodontics 41, no. 5 (May 8, 2019): 502–12. http://dx.doi.org/10.1093/ejo/cjz018.
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Summary Background and objectives The results from the literature regarding the influence of supplemental vibrational forces (SVFs) on orthodontic treatment are controversial. Therefore, this systematic review aimed to evaluate whether SVFs have positive effects, such as in accelerating tooth movement, alleviating pain, and preventing root resorption, in orthodontic patients. Search methods Searches through five electronic databases (PubMed, MEDLINE, EMBASE, Web of Science, and Cochrane Central) were complemented by hand searches up to January, 2019. Selection criteria Randomized controlled trials and controlled clinical trials reporting on the effects of SVFs in orthodontic patients in English were included. Data collection and analysis Study selection, data extraction, and a risk of bias assessment were independently performed by two reviewers. Study characteristics and outcomes were reported according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. A qualitative analysis of the effects of SVFs on orthodontic tooth movement, pain experience, and root resorption was conducted. Results Thirteen studies, including nine clinical trials, were eligible for inclusion in the systematic review. There was no significant evidence to support the positive effects of SVFs in orthodontic patients, neither in accelerating tooth movement nor in alleviating pain experience. According to the Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria, the quality of the evidence was very low for all the outcomes in the qualitative analysis. Limitations The results of this systematic review are based on a limited number of studies and the methodological heterogeneity and non-comparability of original outcomes made it difficult to conduct a meta-analysis. Conclusions There is insufficient evidence to support the claim that SVFs have positive clinical advantages in the alignment of the anterior teeth. The potential positive effects of vibrational forces on space closure, pain experience, and root resorption in orthodontic patients are inconclusive with no sufficient information at present. High-quality clinical trials with larger sample sizes are needed to find more comprehensive evidence of the potential positive effects of vibrational forces. Registration The protocol for this systematic review was registered on PROSPERO (CRD42018098788). Funding This study has not received any contributions from private or public funding agencies. Conflict of Interest None.
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Fatani, Eman Jamal, Rawabi Mahmoud Eskandrani, and Lina Omar Alfadil. "Use of orthodontic mini-screws among orthodontists in Saudi Arabia." International Journal of Research in Medical Sciences 7, no. 4 (March 27, 2019): 1150. http://dx.doi.org/10.18203/2320-6012.ijrms20191316.
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Background: Orthodontic anchorage is a technique used to avoid undesired tooth movement. The miniature screw (mini-screw) implant is an orthodontic innovation that was introduced to circumvent the limitations of conventional anchorage systems. Mini-screws, known as temporary anchorage devices (TADs), give clinicians good control over tooth movement in 3 dimensions and can assist orthodontists in anchorage-demanding cases.Methods: A questionnaire was distributed by online survey using SurveyMonkey and on paper during orthodontic meetings in Saudi Arabia. Collected data were analyzed using SPSS statistical software (version 23, IBM). A 2-way cross-tabulation and Fisher’s exact or Pearson chi-square tests were used to evaluate statistically significant differences. A P-value < 0.05 was considered to be statistically significant.Results: Of 133 respondents, 72 (54.1%) of practitioners worked in the governmental sector and 61 (45.9%) worked in the private sector. A total of (87.3%) of practitioners in the governmental sector and (80%) of practitioners in the private sector reported using mini-screws in clinical practice. Practitioners who reported that they did not use mini-screws in clinical practice listed the following reasons: “I don’t have enough information” (33.3%), “It’s a surgeon’s job” (11.1%), “Not available in the hospital” (29.6%), and “Other” (25.9%). A total of 60.2% of practitioners loaded mini-screws immediately, 8.3% loaded them 1 week after implantation, 11.3% loaded them 2-3 weeks after implantation, and 3.8% loaded them >3 weeks after implantation. Regarding the method of placement, 63.2% of practitioners used radiography for placement guidance/confirmation, 9.8% used a self-made guide, and 8.3% did not use a guide.Conclusions: Lack of education and training are major reasons that practitioners do not use orthodontic mini-screws in Saudi Arabia. Increased efforts to organize seminars and workshops may motivate practitioners to incorporate mini-screw usage into routine practice.
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Chen, Yi-Cheng, Yun-Hao Cheng, Jui-Tang Tseng, and Kun-Ju Hsieh. "Study of a harmonic drive with involute profile flexspline by two-dimensional finite element analysis." Engineering Computations 34, no. 7 (October 2, 2017): 2107–30. http://dx.doi.org/10.1108/ec-03-2017-0086.
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Purpose This paper aims to present simulation results of a harmonic drive (HD) with involute flexspline (FS) profiles based on two-dimensional (2-D) finite element analysis (FEA). Design/methodology/approach First, the mathematical model of the FS with involute tooth profile was developed using a straight-edge rack cutter based on the theory of gearing. Then the engaging circular spline (CS) with conjugate tooth profile of FS was derived based on the enveloping theory and theory of gearing. Additionally, a mesh generation program was developed to discretize the FS based on the mathematical model. An elliptical wave generator (WG) was inserted into the FS, and a torque was applied to drive the FS meshing with the CS. The WG and the CS were both assumed to be rigid in the finite element model. Findings Finally, a 2-D FEA was conducted to explore the stress distribution on the FS, the engagement movement of the FS, the torsional stiffness and the engaged area of teeth of the HD under various conditions. Moreover, this research also studied the effect of changing pressure angle of the involute FS on the performance of the HD. Research limitations/implications The simulation model and methodology presented in this paper paved the way for further investigation and optimization of the HD with involute tooth profile FS and conjugate CS. Originality/value The simulation model of HD is established on conjugate shape based on the theory of gearing and an automatic mesh generation program is developed to generate the finite element model. The characteristics of the HD can thus be simulated according to the developed model.
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Stucki, Sven, and Nikolaos Gkantidis. "Assessment of techniques used for superimposition of maxillary and mandibular 3D surface models to evaluate tooth movement: a systematic review." European Journal of Orthodontics 42, no. 5 (November 19, 2019): 559–70. http://dx.doi.org/10.1093/ejo/cjz075.
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Summary Background Superimposition of three-dimensional (3D) digital models offers great opportunities to assess tooth movement during time. In the literature, several superimposition techniques are described. Objectives To summarize and critically assess the available evidence from studies on serial digital 3D dental model superimposition. Search methods MEDLINE via Ovid and PubMed, EMBASE via Ovid, Cochrane Register of Diagnostic Test Accuracy Studies, and Google Scholar were searched with no time limit (last update: December 2018). Hand and unpublished literature searches were also performed. Selection criteria Studies of any design that had a sample size ≥5 and tested superimposition of serial 3D digital dental models to assess tooth movement were included. Data collection and analysis Study selection, data extraction, and risk of bias assessment were performed independently by the authors. Results Twelve studies met the eligibility criteria. The total risk of bias (QUADAS-2 tool) of 10 studies was high, whereas only 2 studies had unclear bias. Ten studies had high and two studies low overall applicability concerns. From these, one study tested the mandibular alveolar bone area, three studies the rugae area, nine studies a larger palatal area, and two studies the incisive papilla area. The high heterogeneity in samples, outcomes, and methods did not allow for synthesis of a considerable amount of studies in any case. Limitations The high heterogeneity among studies and the limited evidence did not allow for solid conclusions. Conclusions and implications The following areas of the maxilla could provide reliable outcomes: (1) the medial two-thirds of the third rugae and the area 5 mm dorsal to them and (2) an area including all rugae, with the lateral margins located at least 5 mm from the gingival margins and a distal margin that does not extend beyond the first molars. No recommendation is possible for other regions of the mouth. There is an urgent need for further research in the field. Registration PROSPERO (CRD42019124365).
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Lavigne, G. J., T. Kato, A. Kolta, and B. J. Sessle. "Neurobiological Mechanisms Involved in Sleep Bruxism." Critical Reviews in Oral Biology & Medicine 14, no. 1 (January 2003): 30–46. http://dx.doi.org/10.1177/154411130301400104.
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Sleep bruxism (SB) is reported by 8% of the adult population and is mainly associated with rhythmic masticatory muscle activity (RMMA) characterized by repetitive jaw muscle contractions (3 bursts or more at a frequency of 1 Hz). The consequences of SB may include tooth destruction, jaw pain, headaches, or the limitation of mandibular movement, as well as tooth-grinding sounds that disrupt the sleep of bed partners. SB is probably an extreme manifestation of a masticatory muscle activity occurring during the sleep of most normal subjects, since RMMA is observed in 60% of normal sleepers in the absence of grinding sounds. The pathophysiology of SB is becoming clearer, and there is an abundance of evidence outlining the neurophysiology and neurochemistry of rhythmic jaw movements (RJM) in relation to chewing, swallowing, and breathing. The sleep literature provides much evidence describing the mechanisms involved in the reduction of muscle tone, from sleep onset to the atonia that characterizes rapid eye movement (REM) sleep. Several brainstem structures ( e.g., reticular pontis oralis, pontis caudalis, parvocellularis) and neurochemicals ( e.g., serotonin, dopamine, gamma aminobutyric acid [GABA], noradrenaline) are involved in both the genesis of RJM and the modulation of muscle tone during sleep. It remains unknown why a high percentage of normal subjects present RMMA during sleep and why this activity is three times more frequent and higher in amplitude in SB patients. It is also unclear why RMMA during sleep is characterized by co-activation of both jaw-opening and jaw-closing muscles instead of the alternating jaw-opening and jaw-closing muscle activity pattern typical of chewing. The final section of this review proposes that RMMA during sleep has a role in lubricating the upper alimentary tract and increasing airway patency. The review concludes with an outline of questions for future research.
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Dablanca-Blanco, Ana-Belén, Pablo Castelo-Baz, Ramón Miguéns-Vila, Pablo Álvarez-Novoa, and Benjamín Martín-Biedma. "Endodontic Rotary Files, What Should an Endodontist Know?" Medicina 58, no. 6 (May 27, 2022): 719. http://dx.doi.org/10.3390/medicina58060719.
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Clinicians should be aware of all the characteristics and capacities of the instruments that are possible to use when conducting a root canal treatment. The wide variety of nickel–titanium (Ni-Ti) rotary systems on the market and the lack of standardisation of this type of instrument makes the choice in each specific case difficult. Therefore, this review is intended to summarize the characteristics that should be taken into account when choosing one instrument over another. It will be essential to know characteristics, of alloy from which the instrument is made. Moreover, the geometry of the instrument will determine its behaviour, being the mass, the one that marks its resistance to a greater extent. The movement performed by the file is another of the fundamental keys to understand rotary instruments. In conclusion, when performing root canal treatment, the characteristics of the instrument and the tooth must be taken into account, and the operator’s own limitations should be known. This paper provides the key points to keep in mind when making this type of treatment.
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Agung Sosiawan, Jesslyn Jordana, Devin Elysia Dhywinanda, Jennifer Fiona Salim, Nastiti Faradilla Ramadhani, Rofi Nurdiansyah, I Gusti Aju Wahju Ardani, and Alexander Patera Nugraha. "Artificial intelligence driven dental monitoring and surveillance of malocclusion treatment in orthodontic patients." World Journal of Advanced Research and Reviews 16, no. 3 (December 30, 2022): 049–53. http://dx.doi.org/10.30574/wjarr.2022.16.3.1294.
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Background: Orthodontic treatment success does not only depend on proper diagnosis and treatment, but also on patient’s compliance. Patient’s progress and compliance can be monitored through in-office visits at certain time intervals. However, this interval is not necessarily ideal for every patient. Purpose: To overcome this limitation, Dental Monitoring® (DM) is introduced as artificial intelligence (AI) driven remote monitoring, which analyzes tooth movement, oral hygiene, and the condition of orthodontic appliances. This study aimed to describe the clinical application of DM based on the number of in-office visits, duration of treatment, number of refinements, stability of retention phase, tooth movement, patient's oral hygiene, and patient’s subjective perception regarding DM. Review: Based on five articles included, the use of DM during orthodontic treatment had several advantages including the increase of patient’s compliance on maintaining oral hygiene and significant reduction of in-office visits, thus increasing the treatment’s effectiveness and comfort for patients. Duration of treatment and number of refinements that do not differ significantly between DM and non-DM users are considered as DM’s other advantages as it could reduce in-office visits without compromising treatment’s effectiveness. Orthodontic relapse can also be identified hence severe relapse can be prevented. Conclusion: The clinical application of DM can reduce in-office visits, improve oral hygiene and retention stability. However, the use of DM must be carefully considered to prevent decline in doctor-patient relationships
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Raza, Hasnain, Paul Major, Douglas Dederich, and Tarek El-Bialy. "Effect of low-intensity pulsed ultrasound on orthodontically induced root resorption caused by torque: A prospective, double-blind, controlled clinical trial." Angle Orthodontist 86, no. 4 (November 30, 2015): 550–57. http://dx.doi.org/10.2319/081915-554.1.
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ABSTRACT Objectives: To evaluate the effects of low-intensity pulsed ultrasound (LIPUS) on orthodontically induced tooth root resorption caused by torque in human subjects. Materials and Methods: Ten healthy patients (12–35 years of age) who required extraction of all first premolars as a part of their routine orthodontic treatment were recruited. A 15° twist was applied in the arch wire using 0.019 × 0.025-inch TMA in a 0.022-inch bracket system (Synergy R) that produced a buccal root torque of approximately 5 N/mm at the bracket level. Using a split mouth design, randomization, and blinding, one side of the arch received LIPUS for 20 minutes per day for 4 weeks at an incident intensity of 30 mW/cm2 of the transducers’ surface area. The other side served as a self-control, which received a sham transducer. After 4 weeks, all first premolars were extracted and micro–computed tomographic analysis was performed on these extracted teeth. A linear mixed-model statistical analysis was used. Results: LIPUS-treated teeth showed significantly less total volume of resorption lacunae compared to control teeth by a mean difference of (0.54 ± 0.09 mm3) (P < .001) and percentage of root resorption by a mean difference of (0.33 ± 0.05 mm3) (P < .001). In addition, significantly fewer resorption lacunae were found on all root surfaces in the LIPUS group compared to the control except in the instance of the distal surface. Limitations: This study was performed on limited number of cases during a 4-week period. Conclusions: LIPUS minimizes root resorption when applied during torque tooth movement over a 4-week period.
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Jeon, Hyeran Helen, Jessica Kang, Jiahui (Madelaine) Li, Douglas Kim, Gongsheng Yuan, Nicolette Almer, Min Liu, and Shuying Yang. "The Effect of IFT80 Deficiency in Osteocytes on Orthodontic Loading-Induced and Physiologic Bone Remodeling: In Vivo Study." Life 12, no. 8 (July 29, 2022): 1147. http://dx.doi.org/10.3390/life12081147.
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Osteocytes are the main mechanosensory cells during orthodontic and physiologic bone remodeling. However, the question of how osteocytes transmit mechanical stimuli to biological responses remains largely unanswered. Intraflagellar transport (IFT) proteins are important for the formation and function of cilia, which are proposed to be mechanical sensors in osteocytes. In particular, IFT80 is highly expressed in mouse skulls and essential for ciliogenesis. This study aims to investigate the short- and long-term effects of IFT80 deletion in osteocytes on orthodontic bone remodeling and physiological bone remodeling in response to masticatory force. We examined 10-week-old experimental DMP1 CRE+.IFT80f/f and littermate control DMP1 CRE−.IFT80f/f mice. After 5 and 12 days of orthodontic force loading, the orthodontic tooth movement distance and bone parameters were evaluated using microCT. Osteoclast formation was assessed using TRAP-stained paraffin sections. The expression of sclerostin and RANKL was examined using immunofluorescence stain. We found that the deletion of IFT80 in osteocytes did not significantly impact either orthodontic or physiologic bone remodeling, as demonstrated by similar OTM distances, osteoclast numbers, bone volume fractions (bone volume/total volume), bone mineral densities, and the expressions of sclerostin and RANKL. Our findings suggest that there are other possible mechanosensory systems in osteocytes and anatomic limitations to cilia deflection in osteocytes in vivo.
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Alam, Mohammad Khursheed. "Laser-Assisted Orthodontic Tooth Movement in Saudi Population: A Prospective Clinical Intervention of Low-Level Laser Therapy in the 1st Week of Pain Perception in Four Treatment Modalities." Pain Research and Management 2019 (October 20, 2019): 1–11. http://dx.doi.org/10.1155/2019/6271835.
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Background. This first-in-human study in Saudi orthodontic patients has evaluated the role of low-level laser therapy (LLLT) in pain perception (PP). The outcome of single application of LLLT with 4 different treatment modalities (TM) on PP are evaluated following orthodontic bracket bonding on maxilla. Materials and Methods. A prospective clinical intervention with implementation of parallel technique in each group, 32 orthodontic patients with ectopic canine requiring fixed orthodontic appliance were enrolled and randomly allocated to the 4 groups: LLLT + self-ligating (SL) bracket, LLLT + conventional (Conv.) bracket, non-LLLT + SL bracket, and non-LLLT + Conv. bracket. Orthodontic bracket bonding from 1st molar to 1st molar and superelastic 0.012 inch NiTi were applied for the maxilla. For each patient, maxillary 1st molar to molar received a single application of LLLT using a 940 nm Ga-Al-As laser device on 5 different points labially/buccally and palatally. Main outcome measure was the degree of PP score during the 1st week of orthodontic tooth movement (OTM) after 4 hours, 24 hours, 3 days, and 7 days of both LLLT and non-LLLT treatment applications. A questionnaire with an 11-point numeric rating scale (NRS) was used for PP. Results. Mean ± SD of PP in the LLLT + SL group was 3.33 ± 1.4, 3.58 ± 1.06, 2.31 ± 0.67, and 1.89 ± 0.54 in 4 hours, 24 hours, 3 days, and 7 days, respectively. Compared to all 4 TM groups, LLLT groups showed better PP. More statistically significant differences were found in LLLT groups. No harms were encountered. Limitations. The intervention provider and the patient were not blinded to the intervention. Conclusion. The LLLT + SL group revealed significantly promising benefits on PP during OTM.
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Ustun, Kemal, Zafer Sari, Hasan Orucoglu, Ismetdir Duran, and Sema S. Hakki. "Severe Gingival Recession Caused by Traumatic Occlusion and Mucogingival Stress: A Case Report." European Journal of Dentistry 02, no. 02 (April 2008): 127–33. http://dx.doi.org/10.1055/s-0039-1697367.
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ABSTRACTGingival recession is displacement of the soft tissue margin apically leading to root surface exposure. Tooth malpositions, high muscle attachment, frenal pull have been associated with gingival tissue recession. Occlusal trauma is defined as injury resulting in tissue changes within the attachment apparatus as a result of occlusal forces. Trauma from occlusion may cause a shift in tooth position and the direction of the movement depends on the occlusal force. We present the clinical and radiological findings and the limitation of periodontal treatment of a severe gingival recession in a case with traumatic occlusion. A 16 years old male, systemically healthy and nonsmoking patient presented to our clinic with severe gingival recession of mandibular canines and incisors. Clinical evaluation revealed extensive gingival recession on the vestibules of mandibular anterior segment. Patient has an Angle class III malocclusion and deep bite. To maintain the teeth until orthodontic therapy and maxillofacial surgery, mucogingival surgeries were performed to obtain attached gingiva to provide oral hygiene and reduce inflammation. After mucogingival surgeries, limited attached gingiva was gained in this case. Regular periodontal maintenance therapy was performed at 2 month intervals to preserve mandibular anterior teeth. Multidisciplinary approach should be performed in this kind of case for satisfactory results. Unless occlusal relationship was corrected, treatment of severe gingival recession will be problematic. For satisfactory periodontal treatment, early diagnosis of trauma from occlusion and its treatment is very important. (Eur J Dent 2008;2:127-133)
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Wei, Yuzi, and Yongwen Guo. "Clinical Applications of Low-Intensity Pulsed Ultrasound and Its Underlying Mechanisms in Dentistry." Applied Sciences 12, no. 23 (November 22, 2022): 11898. http://dx.doi.org/10.3390/app122311898.
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Low-intensity pulsed ultrasound (LIPUS) serves as a non-invasive treatment tool that reaches the lesion site in the form of ultrasound. Due to its low toxicity, low thermal effect, and low immunogenicity, LIPUS has attracted wide interest in disease treatment. It has been demonstrated that LIPUS can activate multiple signal pathways in the shape of sound wave and one of the most acknowledged downstream response components is integrin/focal adhesion kinase (FAK) complex. In recent years, the functions of LIPUS in bone regeneration, bone healing, bone mass maintenance, and cellular metabolism were found. Various oral diseases and their treatments mainly involve hard/soft tissue regeneration and reconstruction, including periodontitis, orthodontic tooth movement (OTM), dental implant, mandibular deficiency, and dentin-pulp complex injury. Thus, more and more researchers pay close attention to the application prospects of LIPUS in stomatology. We searched these articles in PubMed with keywords LIPUS, temporomandibular joint (TMJ), periodontitis, orthodontics, and pulp, then classified the retrieved literature in the past five years by disease type. In this review, the function effects and possible mechanisms of LIPUS in periodontal tissue regeneration, orthodontic treatment, implant osseointegration, TMJ bone formation/cartilage protection, and dentin-pulp complex repair after injury will be summarized. The challenges LIPUS faced and the research limitations of LIPUS will also be elucidated. Therefore, this paper intends to provide new insights into oral disease treatments, explore the optimal application specification of LIPUS, and probe the future research orientation and the prospect of LIPUS in the dental field.
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DERCELI, Juliana dos Reis, Lígia Antunes Pereira PINELLI, Elisa Maria Aparecida GIRO, Juliana CABRINI, Sabrina Maria CASTANHARO, and Laiza Maria Grassi FAIS. "Oral rehabilitation in a patient with special needs." RGO - Revista Gaúcha de Odontologia 63, no. 3 (September 2015): 337–42. http://dx.doi.org/10.1590/1981-86372015000300013762.
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Cerebral palsy is a disorder caused by central nervous system injuries that can occur during the prenatal, perinatal, or postnatal periods. It is characterized by multiple abnormalities, including impairment of speech, body and motor coordination, balance, intelligence, mastication, and swallowing. Due to abnormal movements of the facial muscles, compounded by impairment of the self-cleansing mechanism of the oral cavity, patients with this condition can develop oral diseases such as caries, periodontal disease, and tooth loss. The aim of this paper is to report a case of a patient with cerebral palsy who presented with absence of the maxillary central incisors, removable prosthesis wear, and oral candidiasis. Impressions of the upper and lower arches and periapical radiographs were obtained. The lateral incisors were found to exhibit root resorption, which contraindicated their use as abutment teeth for fixed prosthodontics. In view of the patient's socioeconomic status and cerebral palsy-related limitations, a resin-bonded fixed partial denture was fabricated and nystatin solution was used for treatment of oral candidiasis. The patient had an esthetically and functionally adequate outcome.
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Lee, Juyoung, Sang Chul Ahn, and Jae-In Hwang. "A Walking-in-Place Method for Virtual Reality Using Position and Orientation Tracking." Sensors 18, no. 9 (August 27, 2018): 2832. http://dx.doi.org/10.3390/s18092832.
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People are interested in traveling in an infinite virtual environment, but no standard navigation method exists yet in Virtual Reality (VR). The Walking-In-Place (WIP) technique is a navigation method that simulates movement to enable immersive travel with less simulator sickness in VR. However, attaching the sensor to the body is troublesome. A previously introduced method that performed WIP using an Inertial Measurement Unit (IMU) helped address this problem. That method does not require placement of additional sensors on the body. That study proved, through evaluation, the acceptable performance of WIP. However, this method has limitations, including a high step-recognition rate when the user does various body motions within the tracking area. Previous works also did not evaluate WIP step recognition accuracy. In this paper, we propose a novel WIP method using position and orientation tracking, which are provided in the most PC-based VR HMDs. Our method also does not require additional sensors on the body and is more stable than the IMU-based method for non-WIP motions. We evaluated our method with nine subjects and found that the WIP step accuracy was 99.32% regardless of head tilt, and the error rate was 0% for squat motion, which is a motion prone to error. We distinguish jog-in-place as “intentional motion” and others as “unintentional motion”. This shows that our method correctly recognizes only jog-in-place. We also apply the saw-tooth function virtual velocity to our method in a mathematical way. Natural navigation is possible when the virtual velocity approach is applied to the WIP method. Our method is useful for various applications which requires jogging.
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Moura, Adolpho Marlon Antoniol, Bruna Marquezini Matos, Saulo Machado Moreira de Sousa, and Horácio Pompei Filho. "Therapeutic approach to patients with chronic orofacial pain with temporomandibular disturbed." Brazilian Journal of Case Reports 2, no. 2 (March 12, 2022): 3–11. http://dx.doi.org/10.52600/2763-583x.bjcr.2022.2.2.3-11.
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Temporomandibular disorder (TMD) is a term that encompasses a series of dysfunctions and disorders that affect the temporomandibular joint (TMJ), masticatory muscles and associated structures. These disorders are characterized by a set of signs and symptoms that may include joint noises, such as clicking and crackling, tooth wear, limited mandibular movement, accompanied or not by facial, cranial and periauricular pain. Here, we reported the clinical conduct of a patient with muscle TMD. Patient with chronic pain complaint in the cervico-craniofacial region, signs of bruxism, mouth opening limitation and masseteric hypertonia. The diagnosis was TMD of bilateral masseteric muscle origin, without trigger points. Heat thermotherapy was prescribed, myofacial and myofunctional physiotherapy, rigid Michigan stabilizer plate making, postural correction, and cognitive-behavioral therapy. The patient presented a gradual evolution of the clinical condition and after 90 days reported remission of approximately 95% of the symptomatological complaints, such as an improvement in the quality of sleep at night, without medication assistance, reduction in pain crises, and full mouth opening (44mm). It is concluded that the correct diagnosis and full patient adherence to the treatment proposed in this study provided relief in painful symptoms and biopsychosocial aspects.
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Carlsson, G. E., and S. Kiliaridis. "Tooth movement." British Dental Journal 198, no. 7 (April 2005): 420–21. http://dx.doi.org/10.1038/sj.bdj.4812246.
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Davidovitch, Zeev. "Tooth Movement." Critical Reviews in Oral Biology & Medicine 2, no. 4 (October 1991): 411–50. http://dx.doi.org/10.1177/10454411910020040101.
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This article reviews the evolution of concepts regarding the biological foundation of force-induced tooth movement. Nineteenth century hypotheses proposed two mechanisms: application of pressure and tension to the periodontal ligament (PDL), and bending of the alveolar bone. Histologic investigations in the early and middle years of the 20th century revealed that both phenomena actually occur concomitantly, and that cells, as well as extracellular components of the PDL and alveolar bone, participate in the response to applied mechanical forces, which ultimately results in remodeling activities. Experiments with isolated cells in culture demonstrated that shape distortion might lead to cellular activation, either by opening plasma membrane ion channels, or by crystallizing cytoskeletal filaments. Mechanical distortion of collagenous matrices, mineralized or non-mineralized, may, on the other hand, evoke the development of bioelectric phenomena (stress-generated potentials and streaming potentials) that are capable of stimulating cells by altering the electric charge on their membrane or their fluid envelope. In intact animals, mechanical perturbations on the order of about 1 min/d are apparently sufficient to cause profound osteogenic responses, perhaps due to matrix proteoglycan-related "strain memory". Enzymatically isolated human PDL cells respond biochemically to mechanical and chemical signals. The latter include endocrines, autocrines, and paracrines. Histochemical and immunohistochemical studies showed that during the early places of tooth movement, PDL fluids are shifted, and cells and matrix are distorted. Vasoactive neurotransmitters are released from periodontal nerve terminals, causing leukocytes to migrate out of adjacent capillaries. Cytokines and growth factors are secreted by these cells, stimulating PDL cells and alveolar bone lining cells to remodel their related matrices. This remodeling activity facilitates movement of teeth into areas in which bone had been resorbed. This emerging information suggests that in the living mammal, many cell types are involved in the biological response to applied mechanical stress to teeth, and thereby to bone. Essentially, cells of the nervous, immune, and endocrine systems become involved in the activation and response of PDL and alveolar bone cells to applied stresses. This fact implies that research in the area of the biological response to force application to teeth should be sufficiently broad to include explorations of possible associations between physical, cellular, and molecular phenomena. The goals of this investigative field should continue to expound on fundamental principles, particularly on extrapolating new findings to the clinical environment, where millions of patients are subjected annually to applications of mechanical forces to their teeth for long periods of time in an effort to improve their position in the oral cavity. Recently developed research tools such as cell culture techniques and immunologic probes, are the best hope for enhancing this development.
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Omar Franklin Molina, Zeila Coelho Santos, Bruno Ricardo Huber Simião, Rógerio Ferreira Marchezan, Natalia de Paula e Silva, and Karla Regina Gama. "A comprehensive method to classify subgroups of bruxers in temporomandibular disorders (TMDs) individuals: frequency, clinical and psychological implications." RSBO 10, no. 1 (March 28, 2014): 11–9. http://dx.doi.org/10.21726/rsbo.v10i1.888.
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Bruxism is an oral pnenomenon described as a parafunctional activity involving nocturnal and/or diurnal tooth clenching and/or grinding which may cause teeth wearing, fatigue, pain in the muscles and temporomandibular joints and limitations in mandibular movements. Objective: To classify bruxers in four different subgroups. Material and methods: Evaluation of 162 individuals presenting temporomandibular disorders (TMDs) referred consecutively over a period of six years. Chief complaint, history of signs/symptoms and clinical examination were used to gather data. Individuals were classified as TMDs if they were seeking active treatment for the following complaints: pain in the masticatory muscles and/or temporomandibular joints (TMJs), difficulties to perform normal jaw movements, tenderness to palpation of muscle and joints, joint noises and. Patients were classified as mild, moderate, severe and extreme bruxers if they presented 3 to 5, 6 to 10, 11 to 15 or 16 to 25 signs and symptoms of bruxing behavior, respectively. Data was submitted to Chi-square for independence and Fisher’s exact test (p < 0.05). Results: Frequencies of 16.1%, 29.6%, 31.5% and 22.8% of mild, moderate, severe and extreme bruxing behavior were found in this study. Moderate and severe bruxing behavior occurred more frequently than mild and extreme bruxing behavior (p < 0.0001). Conclusion: The four groups of bruxers occurred more or less frequently in this study and mild and extreme bruxing behavior demonstrated the lowest frequencies of such behavior.
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Rekhi, Umar, Raisa Queiroz Catunda, and Monica Prasad Gibson. "Surgically accelerated orthodontic techniques and periodontal response: a systematic review." European Journal of Orthodontics 42, no. 6 (January 15, 2020): 635–42. http://dx.doi.org/10.1093/ejo/cjz103.
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Summary Background Reduction in orthodontic treatment time is gaining popularity due to patient demands. Several new techniques of acceleratory orthodontic treatment have been introduced to effectively treat the malocclusion in a shorter time period with minimal adverse effects. Objective The objective of this systematic review is to critically evaluate the potential effect of accelerated surgically assisted orthodontic techniques on periodontal tissues. Materials and methods Electronic databases used to perform the search were Medline (Ovid), EMBASE, PubMed, Scopus, Cochrane, Google Scholar, and hand searching of the literature was also performed. Selection criteria Only randomized control trials (RCTs) that assessed the relationship between accelerated surgically assisted orthodontic techniques and its effects on periodontium were included. Data collection and analysis The Joanna Briggs Institute (JBI) critical appraisal checklist tool (2016) was used to assess the finally selected studies. Among these studies, five evaluated corticotomy-facilitated orthodontics, two tested accelerated tooth movement with piezocision, one compared corticotomy-facilitated orthodontics with piezocision, and one studied the effects of periodontally accelerated osteogenic orthodontics. The duration of these studies was relatively short and had moderate to high risk of bias. Results Literature search identified 225 records from 5 databases and 50 articles from the partial grey literature (Google scholar) search. Finally, nine eligible RCTs were included in the review. Limitations Most of the included studies were of a high risk of bias due to high experimental heterogeneity and small sample size. Long-term follow-up of the periodontal response to these interventions was also lacking. Conclusions There is an absence of evidence considering the lack of long-term follow-up and small sample size therefore, the results of this review should be carefully interpreted. Implications Due to the need for more studies with less risk of bias, these techniques should be implemented in dental practice with caution. With stronger evidence, the study may be confirmed to provide quicker desired results for orthodontic patients. Registration This study protocol was not registered. Funding No funding was obtained for this systematic review.
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Carvalho, Caroline Gomes, João Victor Frazão Câmara, and Paulo Sérgio da Silva Santos. "The positive impact of dental care on the patient's quality of life after cancer treatment: a case report." Research, Society and Development 9, no. 9 (September 1, 2020): e650997639. http://dx.doi.org/10.33448/rsd-v9i9.7639.
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Objective: To report the case of a patient after cancer treatment and evaluate the impact of oral health on quality of life, through the Oral Health Impact Profile (OHIP-14) before, during, and after dental treatment. Methodology: A patient after antineoplastic treatment attended the clinic specialized. In all consultations, OHIP-14 was applied. Case report: A 68-year-old man diagnosed with keratinizing squamous cell carcinoma of the larynx (T3N0MX), undergoing chemotherapy and adjuvant radiotherapy (2878.2 Grays) and vertical partial laryngectomy surgery without ganglionic emptying. After CT, he complained of tooth loss and discomfort in the tongue after radiotherapy. Ex-drinker for 5 years, ex-smoker for 6 months, but alcoholic for> 10 years and smoker <50 years. Side effects of antineoplastic treatment included labial dryness, hyposalivation, dental fractures, residual roots, changes in swallowing, pain during mouth opening, and cervical movement. The results OHIP-14 was medium (17.85), weak (3.52), weak (2.84) and null impact of oral health on quality of life in the initial consultation, throughout the dental treatment, at the end of dental treatment and 1 year and 2 months after dental treatment, respectively. There was a high impact on psychological discomfort (3.55), medium on psychological disability (1.6), and functional limitation (2.04), in 2015, 2017, and 2018, respectively. Conclusion: The performance of the dentist on the late oral effects of chemotherapy and radiotherapy had a positive impact on improving the quality of life after cancer treatment, with the help of the multidisciplinary team.
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Henneman, S., J. W. Von den Hoff, and J. C. Maltha. "Mechanobiology of tooth movement." European Journal of Orthodontics 30, no. 3 (June 1, 2008): 299–306. http://dx.doi.org/10.1093/ejo/cjn020.
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Sabane, Anand, Amol Patil, Vinit Swami, and Preethi Nagarajan. "Biology of Tooth Movement." British Journal of Medicine and Medical Research 16, no. 12 (January 10, 2016): 1–10. http://dx.doi.org/10.9734/bjmmr/2016/27019.
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Jacobson, Alex. "Tooth Movement Zeev Davidovitch." American Journal of Orthodontics and Dentofacial Orthopedics 103, no. 1 (January 1993): 93. http://dx.doi.org/10.1016/s0889-5406(05)81388-5.
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Graber, T. M. "Prostaglandins and tooth movement." American Journal of Orthodontics 87, no. 1 (January 1985): 85–86. http://dx.doi.org/10.1016/0002-9416(85)90186-1.
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Sastre, Julien, and Michel Le Gall. "Tooth movement – clinical implications." International Orthodontics 8, no. 2 (June 2010): 105–23. http://dx.doi.org/10.1016/j.ortho.2010.03.011.
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Kalha, Anmol S. "Medication and tooth movement." Evidence-Based Dentistry 10, no. 2 (June 2009): 50–51. http://dx.doi.org/10.1038/sj.ebd.6400652.
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Wise, G. E., and G. J. King. "Mechanisms of Tooth Eruption and Orthodontic Tooth Movement." Journal of Dental Research 87, no. 5 (May 2008): 414–34. http://dx.doi.org/10.1177/154405910808700509.
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Teeth move through alveolar bone, whether through the normal process of tooth eruption or by strains generated by orthodontic appliances. Both eruption and orthodontics accomplish this feat through similar fundamental biological processes, osteoclastogenesis and osteogenesis, but there are differences that make their mechanisms unique. A better appreciation of the molecular and cellular events that regulate osteoclastogenesis and osteogenesis in eruption and orthodontics is not only central to our understanding of how these processes occur, but also is needed for ultimate development of the means to control them. Possible future studies in these areas are also discussed, with particular emphasis on translation of fundamental knowledge to improve dental treatments.
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Sidorenko, A. N. "Diagnosis and perfection of the complex treatment of patients with neuromuscular dysfunction syndrome of the temporomandibular joints." Kazan medical journal 93, no. 4 (August 15, 2012): 627–31. http://dx.doi.org/10.17816/kmj1557.
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Aim. To improve the complex treatment of patients with neuromuscular dysfunction syndrome of the temporomandibular joints. Methods. Clinical examination, electromyography of masticatory muscles, computed tomography in 24 patients (main group) with a neuromuscular dysfunction syndrome of the temporomandibular joints. The control group included 10 healthy individuals aged 18 to 32 years with intact tooth rows, orthognatic bite, and without pathology of the temporomandibular joints. In cases of deviation of the mandible at the time of opening the mouth in 7 (29.2%) patients the complex of therapeutic measures included a myo-gymnastic exercise, which consisted of shifting the mandible with the palm of the hand towards the opposite side of the deviation. During zigzag movements of the mandible in 12 (50%) patients assigned was myo-gymnastic exercise, aimed at keeping the lower jaw with the palms of both hands in the sagittal plane during a vertical opening of the mouth. In 5 (20.8%) patients with a small limitation of mouth opening and lateral displacement of the mandible myo-gymnastics were used that included exercises designed to stretch and cause reflex relaxation of the masticatory muscles, as well as the displacement of the mandible in the palm of the hand to the side opposite to its deviation. All patients from the start of treatment were prescribed a course (10 sessions) of therapeutic massage of the masticatory muscles and 10 sessions of transcranial electrostimulation in 8 (33.3%) patients to relax the chewing muscles in its hypertonicity, to relieve spasm of the lateral pterygoid muscle, and removal the significant pain syndrome. Results. By the 5-6th session of transcranial electrostimulation the pain and tension in the masticatory muscles on the affected side with neuromuscular dysfunction disappeared, the range of motion of the mandible was restored, atypical movement of the mandible stopped. Examination of 24 patients at 2 years after treatment showed that 22 patients had a sustained, positive result, no complaints or recurrences were observed. In 2 patients after treatment noted was significant tension in the masticatory muscles, they were re-appointed for transcranial electrostimulation. Conclusion. Developed and proposed was an improved method of complex treatment of patients with neuromuscular dysfunction syndrome of the temporomandibular joints without the use of drugs, which has shown high effectiveness.
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Karthi, Muthukumar, GobichettipalyamJagtheeswaran Anbuslevan, KullampalyamPalanisamy Senthilkumar, Senthilkumar Tamizharsi, Subramani Raja, and Krishnan Prabhakar. "NSAIDs in orthodontic tooth movement." Journal of Pharmacy and Bioallied Sciences 4, no. 6 (2012): 304. http://dx.doi.org/10.4103/0975-7406.100280.
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Kumar, AAnand, K. Saravanan, SSathesh Kumar, and K. Kohila. "Biomarkers in orthodontic tooth movement." Journal of Pharmacy and Bioallied Sciences 7, no. 6 (2015): 325. http://dx.doi.org/10.4103/0975-7406.163437.
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Kamboj, Ashish. "Malocclusion and orthodontic tooth movement." IP Indian Journal of Orthodontics and Dentofacial Research 8, no. 2 (May 15, 2022): 73–74. http://dx.doi.org/10.18231/j.ijodr.2022.013.
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Lee, Won. "Corticotomy for orthodontic tooth movement." Journal of the Korean Association of Oral and Maxillofacial Surgeons 44, no. 6 (2018): 251. http://dx.doi.org/10.5125/jkaoms.2018.44.6.251.
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Vandevska-Radunovic, V. "Biological mechanisms of tooth movement." European Journal of Orthodontics 32, no. 1 (December 3, 2009): 114. http://dx.doi.org/10.1093/ejo/cjp126.
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Shah, Sophia. "Biological Mechanisms of Tooth Movement." European Journal of Orthodontics 39, no. 3 (January 25, 2017): 343. http://dx.doi.org/10.1093/ejo/cjw083.
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Iwasaki, L. R., L. D. Crouch, and J. C. Nickel. "Genetic Factors and Tooth Movement." Seminars in Orthodontics 14, no. 2 (June 2008): 135–45. http://dx.doi.org/10.1053/j.sodo.2008.02.004.
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Jiang, C., Z. Li, H. Quan, L. Xiao, J. Zhao, C. Jiang, Y. Wang, et al. "Osteoimmunology in orthodontic tooth movement." Oral Diseases 21, no. 6 (August 14, 2014): 694–704. http://dx.doi.org/10.1111/odi.12273.
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