Статті в журналах: "Dental anthropology Dental arch"

1

Molnar, Stephen, and Iva M. Molnar. "Dental arch shape and tooth wear variability." American Journal of Physical Anthropology 82, no. 3 (July 1990): 385–95. http://dx.doi.org/10.1002/ajpa.1330820314.

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2

Schaefer, Katrin, Tomislav Lauc, Philipp Mitteroecker, Philipp Gunz, and Fred L. Bookstein. "Dental Arch Asymmetry in an Isolated Adriatic Community." American Journal of Physical Anthropology 129, no. 1 (2005): 132–42. http://dx.doi.org/10.1002/ajpa.20224.

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3

El Sergani, Ahmed M., Joel Anderton, Stephanie Brandebura, Monica Obniski, Monica T. Ginart, Carmencita Padilla, Azeez Butali, et al. "Prevalence of Torus Palatinus and association with dental arch shape in a multi-ethnic cohort." HOMO 71, no. 4 (November 30, 2020): 273–80. http://dx.doi.org/10.1127/homo/2020/1316.

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4

Ferrario, Virgilio F., Chiarella Sforza, Alessandro Miani, and Gianluca Tartaglia. "Human dental arch shape evaluated by Euclidean-distance matrix analysis." American Journal of Physical Anthropology 90, no. 4 (April 1993): 445–53. http://dx.doi.org/10.1002/ajpa.1330900405.

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5

Zigante, Martina, Andrej Pavlic, Vaska Vandevska Radunovic, Alana Mathewson, Ana Kotarac Knezevic, and Stjepan Spalj. "Changes of mandibular dental arch shape during adolescence and its influence on late mandibular incisor crowding." HOMO 70, no. 3 (November 11, 2019): 185–92. http://dx.doi.org/10.1127/homo/2019/1070.

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6

Niraula, Nischal, Reecha Acharya, Manoj Humagain, Zohaib Khurshid, Necdet Adanir, and Dinesh Rokaya. "Dental-Facial Midline: An Esthetic Based Classification." Open Dentistry Journal 15, no. 1 (February 19, 2021): 404–8. http://dx.doi.org/10.2174/1874210602115010404.

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Background: The facial midline and dental midline play an important role in facial esthetics, cosmetic dentistry, facial plastic surgery, and anthropologic studies. Objective: This study studied the dental-facial midline in Nepalese subjects and to classify the midline. Methods: The study was conducted in 150 Nepalese subjects, mostly consisting of University students (80 males and 70 females). After obtaining ethical approval, facial and dental midlines were analyzed using a scale. Results: It showed 26 (18%) study subjects showed the coincidence of the facial midline with the maxillary and mandibular dental midlines. It showed that only 44 (30%) subjects showed the coincidence of facial midline with only maxillary dental midline, and 26 (17%) subjects showed the facial midline coincidence with only mandibular dental midline. The dental midline discrepancy was more prevalent in the maxillary arch and more prevalent on the right side. Midline discrepancy is seen more in males compared to females. The majority of the deviation showed 1 mm, followed by 2 mm, and 3 mm. Conclusion: The coincidence of the facial midline with both the maxillary and mandibular dental midlines is uncommon. Midline discrepancy is seen more in males compared to females. The majority of the subjects show a mild discrepancy of 1 mm. The midline discrepancy was more seen on the right side and in the maxillary arch.

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7

Niraula, Nischal, Reecha Acharya, Manoj Humagain, Zohaib Khurshid, Necdet Adanir, and Dinesh Rokaya. "Dental-Facial Midline: An Esthetic Based Classification." Open Dentistry Journal 15, no. 1 (September 1, 2021): 405–9. http://dx.doi.org/10.2174/1874210602115010405.

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Background: The facial midline and dental midline play an important role in facial esthetics, cosmetic dentistry, facial plastic surgery, and anthropologic studies. Objective: This study studied the dental-facial midline in Nepalese subjects and to classify the midline. Methods: The study was conducted in 150 Nepalese subjects, mostly consisting of University students (80 males and 70 females). After obtaining ethical approval, facial and dental midlines were analyzed using a scale. Results: It showed 26 (18%) study subjects showed the coincidence of the facial midline with the maxillary and mandibular dental midlines. It showed that only 44 (30%) subjects showed the coincidence of facial midline with only maxillary dental midline, and 26 (17%) subjects showed the facial midline coincidence with only mandibular dental midline. The dental midline discrepancy was more prevalent in the maxillary arch and more prevalent on the right side. Midline discrepancy is seen more in males compared to females. The majority of the deviation showed 1 mm, followed by 2 mm, and 3 mm. Conclusion: The coincidence of the facial midline with both the maxillary and mandibular dental midlines is uncommon. Midline discrepancy is seen more in males compared to females. The majority of the subjects show a mild discrepancy of 1 mm. The midline discrepancy was more seen on the right side and in the maxillary arch.

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8

Sultan, Jawaid, Faryal Manzoor, Umar Khayyam, Shuja Hamid, Samreen Zubair, and Tabinda Hanif. "Determinant Factors of Maxillary Arch Dimension of Students Aged 18 - 25 Years at Prosthetic Department Bhittai Dental and Medical College." Pakistan Journal of Medical and Health Sciences 16, no. 9 (September 30, 2022): 681–83. http://dx.doi.org/10.53350/pjmhs22169681.

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Objective: To determine the factors of maxillary arch dimension of students aged 18–25 years in the prosthetic department at Bhittai Dental and Medical College Methods: This cross-sectional study was done at the prosthetic department at Bhittai Dental and Medical College, MirpurKhas. All the students having Class I canine and molar relationships; well-aligned upper and lower dental arches; mixed dentition; good facial symmetry; and no previous orthodontic treatment. Dental arch dimensions of width, length, and depth were taken by one examiner using the Korkhaus’ compass and a digital pachymeter. All the data was collected by the study proforma and SPSS version 26 was used for the purpose of analysis. Results: A total of 50 students were studied. Their mean age was 22.68+3.32 years. According to the arch width, the mean inter canine distance was 35.28+1.98 mm, the mean inter pre molar distance was 42.92+2.36 mm, the mean inter first molar distance was 52.48+4.03 mm, and the mean inter 2nd molar distance was 59.52+3.61mm. According to the maxillary arch length, the anterior arch length was 8.32+1.34mm, molar ventricle distance was 29.72+2.52 mm and the total arch length was 43.2+2.1mm. In the arch width and length, the mean inter 2nd molar distance and anterior arch length were statistically insignificant according to age and gender (p-<0.05). Conclusion: In conclusion, within the age range that was investigated, slight gender discrepancies were evident using all available approaches in maxillary arch width and length. There was found a slight difference in age groups and gender as the average maxillary arch width and length were observed to be slightly higher than females. Keywords: Maxillary arch, width, length, age, gender

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9

Brown, Tasman, Amanda H. Abbott, and Vivian B. Burgess. "Longitudinal study of dental arch relationships in Australian Aboriginals with reference to alternate intercuspation." American Journal of Physical Anthropology 72, no. 1 (January 1987): 49–57. http://dx.doi.org/10.1002/ajpa.1330720107.

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10

Tanguay, Richard, Peter H. Buschang, and Harvey Goldstein. "Multilevel models for repeated measures: A flexible approach for studying dental arch morphology." American Journal of Human Biology 5, no. 1 (1993): 85–91. http://dx.doi.org/10.1002/ajhb.1310050112.

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11

Ihde, Stefan, Aleksandra Karykowska, Jacek Szczurowski, Kamil Nelke, Karolina Goździewska-Harłajczuk, Joanna Klećkowska-Nawrot, Łukasz Pałka, Maciej Janeczek, Oleg P. Melnyk, and Maciej Dobrzyński. "Evaluations and Measurements of the Occurrence of Maxilla and Palatine Bone Asymmetry Based on 3D Printed Stereolithographic Models in Elderly Edentulous People." Applied Sciences 12, no. 18 (September 17, 2022): 9320. http://dx.doi.org/10.3390/app12189320.

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This study aimed to evaluate and measure the occurrence of jaw and palate asymmetry based on 3D-printed stereolithographic models of edentulous elderly people. The analyses were performed on 3D models of the jaws, which were printed using the data (CT) obtained from the CBCT center. The control group consisted of 10 modern adult skulls (7 male and 3 female skulls) owned by the Department of Anthropology of the Wrocław University of Environmental and Life Sciences. The small size of the studied groups did not allow for the performance of the analysis indicating the form of the observed morphological asymmetry—it was impossible to differentiate to indicate whether the examined features showed directional or fluctuating asymmetry. However, it was possible to determine the direction of the morphological asymmetry of the analyzed features. Both in the test group and the control group, it was a right-sided asymmetry. The analysis of the significance of differences in mean values of the asymmetry index showed that the intensity of asymmetry of the anterior part of the superior alveolar arch was significantly greater in the test group. The severity of the asymmetry of the lateral part of the alveolar arch in the tested groups did not differ significantly. The authors concluded that adequate maxillary height does not only influence proper dental prosthesis adhesion but also corresponds with a potential source for correct dental implant placement. We also concluded that the vertical height of the edentulous alveolar process of the mandible is important for adequate prosthesis fixing. In some cases, the bone atrophy and the bone itself are asymmetrical, so planning a prosthesis might be challenging. The adequate placement of implants should include the symmetry of jaw bones because of future masticatory force impact on the bone and the entire masticatory system, including the temporomandibular joint.

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12

Kati, Firas Abd. "Shortened dental arch." Journal of Oral Research S, no. 3 (March 30, 2020): 30–32. http://dx.doi.org/10.17126/joralres.2020.060.

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13

Al-Zubair, Nabil Muhsen. "Dental arch asymmetry." European Journal of Dentistry 08, no. 02 (April 2014): 224–28. http://dx.doi.org/10.4103/1305-7456.130608.

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ABSTRACT Objective: This study was conducted to assess the dental arch asymmetry in a Yemeni sample aged (18-25) years. Materials and Methods: The investigation involved clinical examination of 1479 adults; only 253 (129 females, 124 males) out of the total sample were selected to fulfill the criteria for the study sample. Study models were constructed and evaluated to measure mandibular arch dimensions. Three linear distances were utilized on each side on the dental arch: Incisal-canine distance, canine-molar distance and incisal-molar distance, which represent the dental arch segmental measurements. Results: When applying “t-test” at P < 0.05, no significant differences were found between the right and left canine-molar, incisal-canine and incisal-molar distances in both dental arches for both sexes. The greater variation (0.30 mm) was observed between right and left canine-molar distance in the maxillary dental arch in male and the smaller (0.04 mm) in the mandibular dental arch between the right and left canine-molar distance in females. Conclusion: The findings of the present study revealed a symmetrical pattern of dental arches, since the right and left sides showed no statistically significant difference. In general, it can be observed that the measurements related to the central incisors and canines have the widest range of reading and give the impression that the location of central incisor and canines to each other and to other teeth is the strongest factor in determining the dental arch asymmetry.

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14

Connell, Todd. "Dental arch dimensional changes." American Journal of Orthodontics and Dentofacial Orthopedics 146, no. 2 (August 2014): 135. http://dx.doi.org/10.1016/j.ajodo.2014.05.014.

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15

Rae, Todd C., and Simon Hillson. "Dental Anthropology." Journal of the Royal Anthropological Institute 4, no. 2 (June 1998): 358. http://dx.doi.org/10.2307/3034513.

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16

Scott, G. R., and C. G. Turner. "Dental Anthropology." Annual Review of Anthropology 17, no. 1 (October 1988): 99–126. http://dx.doi.org/10.1146/annurev.an.17.100188.000531.

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17

Corruccini, Robert S. "Dental anthropology." American Journal of Human Biology 9, no. 5 (1997): 665–66. http://dx.doi.org/10.1002/(sici)1520-6300(1997)9:5<665::aid-ajhb13>3.0.co;2-k.

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18

Mayhall, John T. "Dental anthropology." American Journal of Physical Anthropology 104, no. 4 (December 1997): 535–36. http://dx.doi.org/10.1002/(sici)1096-8644(199712)104:4<535::aid-ajpa8>3.0.co;2-q.

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19

UENO, Kentaro, Shunji KUMABE, Michiko NAKATSUKA, and Isao TAMURA. "Factors influencing dental arch form." Okajimas Folia Anatomica Japonica 96, no. 1 (2019): 31–46. http://dx.doi.org/10.2535/ofaj.96.31.

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20

Al-Zubair, Nabil M. "Establishment of Yemeni Dental Arch Form." Orthodontic Journal of Nepal 3, no. 2 (December 31, 2013): 22–26. http://dx.doi.org/10.3126/ojn.v3i2.10073.

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Objective: To assess the dental arch forms of Yemeni adult sample. Materials & Method: The Eucledian clustering method of analysis was utilized for the determination of dental arch form. A total of 398 study models were constructed and evaluated to do measurements for both arches using a modified sliding caliper gauge. Six dental cast measurements divided into three sagittal and three transverse measurements were utilized to represent the dental arch width and length measurements. Result: Narrow form is the most prevalent arch form (30.9%) followed by wide form (23.9%), their prominence appear more in females and the least prevalent arch form was the mid form (9.3%), while flat and pointed forms were in between 18.3% and 17.6% respectively. Conclusion: Five arch forms: narrow, wide, mid, pointed and flat were distinguished as unique forms for the dental arches, with the predominance of the narrow arch form were found among Yemeni adults.

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21

Ling, John Y. K., and Ricky W. K. Wong. "Dental Arch Widths of Southern Chinese." Angle Orthodontist 79, no. 1 (January 1, 2009): 54–63. http://dx.doi.org/10.2319/092007-452.1.

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Abstract Objective: To investigate the dental arch width of the Southern Chinese across buccal cusps, central fossae, or lingual cusps and compare these values with study findings in different populations and using different definitions. Materials and Methods: The dental arch dimensions of study casts of an unselected sample from a 12-year-old Hong Kong Oral Health Survey of 12-year-old children (n = 358; 210 boys and 148 girls) were measured. Results: When compared with Caucasians, the Southern Chinese were characterized by a wider dental arch width. However, variations were great. All maxillary and mandibular male arch widths were significantly larger than female arch widths, except at the incisor regions. Conclusion: This study yielded a database about dental arch widths by which different studies on these widths can be compared.

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22

Hovorakova, Maria, Oldrich Zahradnicek, Martin Bartos, Pavel Hurnik, Jiri Stransky, Jan Stembirek, and Abigail S. Tucker. "Reawakening of Ancestral Dental Potential as a Mechanism to Explain Dental Pathologies." Integrative and Comparative Biology 60, no. 3 (June 3, 2020): 619–29. http://dx.doi.org/10.1093/icb/icaa053.

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Synopsis During evolution, there has been a trend to reduce both the number of teeth and the location where they are found within the oral cavity. In mammals, the formation of teeth is restricted to a horseshoe band of odontogenic tissue, creating a single dental arch on the top and bottom of the jaw. Additional teeth and structures containing dental tissue, such as odontogenic tumors or cysts, can appear as pathologies. These tooth-like structures can be associated with the normal dentition, appearing within the dental arch, or in nondental areas. The etiology of these pathologies is not well elucidated. Reawakening of the potential to form teeth in different parts of the oral cavity could explain the origin of dental pathologies outside the dental arch, thus such pathologies are a consequence of our evolutionary history. In this review, we look at the changing pattern of tooth formation within the oral cavity during vertebrate evolution, the potential to form additional tooth-like structures in mammals, and discuss how this knowledge shapes our understanding of dental pathologies in humans.

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23

Zhu, Shengshan, He Fang, and Dawei Zhang. "An Algorithm for Automatically Extracting Dental Arch curve." Journal of Physics: Conference Series 2082, no. 1 (November 1, 2021): 012018. http://dx.doi.org/10.1088/1742-6596/2082/1/012018.

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Abstract Dental cone beam CT (CBCT) scans, due to their low radiation dose, are now widely used in the medical diagnosis of patients’ oral cavity. The reconstruction of a panoramic view of the dental arch from the scanned CBCT data facilitates the dentist’s observation of the patient’s oral condition. The most important technique for reconstructing the dental arch panorama is the extraction of the dental arch curve accurately. The existing method is to rely on the experience of the dentist to manually connect the dental arch curve, or use techniques related to threshold segmentation to extract dental arch curve. These methods rely on the experience of dentists on the one hand. On the other hand, when there are interferences such as implants, metal tubes, braces or missing teeth in the patient’s mouth, the threshold calculation will be wrong. Based on this, this article starts with the histogram of CBCT data, and proposes a highly robust and fully automatic dental arch curve extraction method. In the actual experiment, the dental arch curves of 40 different patients were extracted, and all the dental arch curves can be accurately and automatically extracted, thus verifying the effectiveness of the proposed algorithm.

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24

Katagiri, Shingo. "Esthetic Treatment for Asymmetric Dental Arch." Nihon Hotetsu Shika Gakkai Zasshi 47, no. 5 (2003): 834–35. http://dx.doi.org/10.2186/jjps.47.834.

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25

Alkadhi, Omar Hamad, Sarah Fahad Almahfouz, Hana Abdulmajeed Tokhtah, and Lamia Abdulaziz Binhuwaishel. "Dental Arch Dimensions in Saudi Adults." International Journal of Dentistry 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/2190250.

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Objective. The aim of this study was to investigate the arch dimensions (width, length, and depth) in Saudi Arabia.Materials and Methods. 169 orthodontic models (73 males and 96 females) made of white stone were selected according to inclusion criteria. Measurement of arch dimensions was taken including width, length, and depth at different reference points. Differences between males and females were tested using independent samplest-test.Results. The sample comprised subjects aged 18–33 years old. Most measurements showed higher values for males compared to females. Saudi males showed smaller intercanine widths compared to Caucasians and Southern Chinese but larger widths in females compared to Caucasians and smaller widths compared to Southern Chinese. Saudi males and females showed larger intermolar widths compared to Caucasians but smaller intermolar widths compared to Southern Chinese. For arch length, Saudis showed longer arches compared to Yemenis for both males and females but smaller palatal depths compared to Yemenis.Conclusions. Differences in intercanine width, intermolar width, and palatal length and depth were found between Saudis and other nationalities. Male and female participants had differences in most of the measurements.

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26

Tauferová, E., Z. Teuberová, M. Seydlová, V. Smutný, J. Racek, M. Bartonova, and T. Dostálová. "Shape and Size of Dental Arch." Methods of Information in Medicine 45, no. 02 (2006): 191–94. http://dx.doi.org/10.1055/s-0038-1634066.

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Summary Objectives: The diagnostic procedure commences with the initial examination, during which a number of individual findings of the occlusion or malocclusion are clarified [1]. The objective is to describe the morphological and functional characteristics on each patient using specific guidelines, and then to provide a prognosis of the therapy. Upper and lower arch compression in first premolars and molars area was visible before treatment. Methods: A special device (Czech technical university research prototype) was prepared for this purpose. The optical head contains a digital color camera. The front of the optical head consists of a removable prism which is put into the mouth. The findings can display live images from the camera, which can be archived on a PC. The device captured and geometrically calibrated images permitting comparison of several different dental casts. Results: In the first part of this study 792 sets of study plaster casts were screened. Measurements of dental arch width between reference points of canines, first premolars and first molars were made: upper jaw: men: 3-3 – 35.1 mm (SE 0.13); 4-4 – 37.5 mm (SE 0.13); 6-6 – 48.1 mm (SE 0.19); women: 3-3 – 33.4 mm (SE 0.13); 4-4 – 35.6 mm (SE 0.15); 6-6 – 46.7 mm (SE 0.19). The second part concerns the group of 36 patients which is different from the 792 controls. There were studied changes between initial, post-treatment and post-retention alignment of upper and lower dental arch. Conclusions: Geometrically calibrated images help compare several different steps of the treatment and show a significant difference between patients before and after treatment.

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27

Walter, M. H., A. Weber, B. Marré, I. Gitt, J. Gerß, W. Hannak, S. Hartmann, et al. "The Randomized Shortened Dental Arch Study." Journal of Dental Research 89, no. 8 (April 16, 2010): 818–22. http://dx.doi.org/10.1177/0022034510366817.

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28

Baluta, J., and C. L. B. Lavelle. "An analysis of dental arch form." European Journal of Orthodontics 9, no. 1 (January 1, 1987): 165–71. http://dx.doi.org/10.1093/ejo/9.1.165.

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Baluta, J., and C. L. B. Lavelle. "An analysis of dental arch form." European Journal of Orthodontics 9, no. 2 (May 1, 1987): 165–71. http://dx.doi.org/10.1093/ejo/9.2.165.

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30

Wolfart, S., B. Marré, B. Wöstmann, M. Kern, T. Mundt, R. G. Luthardt, J. Huppertz, et al. "The Randomized Shortened Dental Arch Study." Journal of Dental Research 91, no. 7_suppl (June 14, 2012): S65—S71. http://dx.doi.org/10.1177/0022034512447950.

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The scientific evidence concerning prosthodontic care for the shortened dental arch (SDA) is sparse. This randomized multicenter study aimed to compare two common treatment options: removable partial dental prostheses (RPDPs) for molar replacement vs. no replacement (SDA). One of the hypotheses was that the follow-up treatment differs between patients with RPDPs and patients with SDAs during the 5-year follow-up period. Two hundred and fifteen patients with complete molar loss in one jaw were included in the study. Molars were either replaced by RPDPs or not replaced according to the SDA concept. A mean number of 4.2 (RPDP) and 2.8 (SDA) treatments for biological or technical reasons occurred during the 5-year observation time per patient. Concerning the biological aspect, no significant differences between the groups could be shown, whereas treatment arising from technical reasons was significantly more frequent for the RPDP group. When the severity of treatment was analyzed, a change over time was evident. When, at baseline, only follow-up treatment with minimal effort is required, over time there is a continuous increase to moderate and extensive effort observed for both groups ( Controlled-trials.com number ISRCTN97265367).

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Carter, Gary A., and James A. McNamara. "Longitudinal dental arch changes in adults." American Journal of Orthodontics and Dentofacial Orthopedics 114, no. 1 (July 1998): 88–99. http://dx.doi.org/10.1016/s0889-5406(98)70243-4.

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32

Yang, Chiao-ling, Feng-ling Chen, and Sinn-wen Chen. "Anodization of the dental arch wires." Materials Chemistry and Physics 100, no. 2-3 (December 2006): 268–74. http://dx.doi.org/10.1016/j.matchemphys.2005.12.042.

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33

Wadia, Reena. "Simultaneous versus individual-arch dental bleaching." British Dental Journal 233, no. 8 (October 28, 2022): 649. http://dx.doi.org/10.1038/s41415-022-5179-5.

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34

Bu, Xianghhong, Khaled Khalaf, and Ross S. Hobson. "Dental arch dimensions in oligodontia patients." American Journal of Orthodontics and Dentofacial Orthopedics 134, no. 6 (December 2008): 768–72. http://dx.doi.org/10.1016/j.ajodo.2007.03.029.

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35

Lee, Shin-Jae, Sungim Lee, Johan Lim, Heon-Jin Park, and Timothy T. Wheeler. "Method to classify dental arch forms." American Journal of Orthodontics and Dentofacial Orthopedics 140, no. 1 (July 2011): 87–96. http://dx.doi.org/10.1016/j.ajodo.2011.03.016.

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36

Teaford, Mark F. "Dental microwear and dental function." Evolutionary Anthropology: Issues, News, and Reviews 3, no. 1 (June 2, 2005): 17–30. http://dx.doi.org/10.1002/evan.1360030107.

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37

Jiang, Jin Gang, Tian Hua He, Ye Dai, and Yong De Zhang. "Control Point Optimization and Simulation of Dental Arch Generator." Applied Mechanics and Materials 494-495 (February 2014): 1364–67. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1364.

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During the manufacture of complete denture, the most important step is to design and generate the dental arch curve which adapts to the requirement of patients according to the jaw arch morphology of them. It is important to study the optimization method of the number and position of control point for the dental arch generator. On the basis of motion analysis of the dental arch generator, objective function, multivariate design and constraint function of control point optimization of dental arch generator is determined. Control points number and position of the dental arch generator is optimized. Simulation results verify the feasibility of control point optimization method.

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Sofyanti, Ervina, Trelia Boel, Denny Satria, Zuriyah Fionita Ritonga, and Indah Hafniar Hasibuan. "Evaluation of dental arches in orthodontic patients with condylar hyperplasia in a North Sumatra subpopulation: a cross-sectional study." F1000Research 9 (April 16, 2020): 263. http://dx.doi.org/10.12688/f1000research.22780.1.

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Background: Condylar Hyperplasia (CH) is a self-limiting mandibular condyle disorder that shows asymmetry progress conjunction with associated occlusal changes as long as condylar growth is still active and leads to facial asymmetry. This study aimed to evaluate dental arches by analyzing dental arch asymmetry and form in orthodontic patients with CH in a North Sumatra subpopulation. Methods: This is a retrospective study of suspected CH patient’s clinical records who sought for the initial orthodontic treatment between January 2015 to March 2019. Patient with facial asymmetry (based on photography, posterior cross bite and midline deviation), positive temporomandibular joint disorder in functional analysis, and no history of facial trauma were included in the study. Dental arch asymmetry was based on the measurement of dental midline deviation, canine tip in the dental arch, distance of the upper canines from the palatal suture, and inter canine distance. The evaluation of dental arch was achieved by comparing arch width and length. Results: There was a significant difference (p<0.05) of upper canine distance from the palatal suture in female patients when evaluating upper dental arch asymmetry. There was a moderate correlation (r=0.379) in midline deviation between upper and lower dental arch. The dimension and dental arch form was mid and flat, and there was moderate correlation (r=0.448) between the upper and lower dental arch form in these CH patients. Conclusion: The evaluation of dental arch symmetry and arch form showed asymmetric occlusal characteristics in orthodontics patient with CH in North Sumatera subpopulation. In treating these patients, we recommend the plaster cast evaluation as essential and routine procedure in order to understand the complexity of occlusal change due to active growth of condylar and limitation in radiography evaluation.

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Sofyanti, Ervina, Trelia Boel, Denny Satria, Zuriyah Fionita Ritonga, and Indah Hafniar Hasibuan. "Evaluation of dental arches in orthodontic patients with condylar hyperplasia in a North Sumatra subpopulation: a cross-sectional study." F1000Research 9 (May 21, 2020): 263. http://dx.doi.org/10.12688/f1000research.22780.2.

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Анотація:

Background: Condylar Hyperplasia (CH) is a self-limiting mandibular condyle disorder that shows asymmetry progress conjunction with associated occlusal changes as long as condylar growth is still active and leads to facial asymmetry. This study aimed to evaluate dental arches by analyzing dental arch asymmetry and form in orthodontic patients with CH in a North Sumatra subpopulation. Methods: This is a retrospective study of suspected CH patient’s clinical records who sought for the initial orthodontic treatment between January 2015 to March 2019. Patient with facial asymmetry (based on photography, posterior cross bite and midline deviation), positive temporomandibular joint disorder in functional analysis, and no history of facial trauma were included in the study. Dental arch asymmetry was based on the measurement of dental midline deviation, canine tip in the dental arch, distance of the upper canines from the palatal suture, and inter canine distance. The evaluation of dental arch was achieved by comparing arch width and length. Results: There was a significant difference (p<0.05) of upper canine distance from the palatal suture in female patients when evaluating upper dental arch asymmetry. There was a moderate correlation (r=0.379) in midline deviation between upper and lower dental arch. The dimension and dental arch form was mid and flat, and there was moderate correlation (r=0.448) between the upper and lower dental arch form in these CH patients. Conclusion: The evaluation of dental arch symmetry and arch form showed asymmetric occlusal characteristics in orthodontics patient with CH in North Sumatera subpopulation. In treating these patients, we recommend the plaster cast evaluation as essential and routine procedure in order to understand the complexity of occlusal change due to active growth of condylar and limitation in radiography evaluation.

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Tavares, Alana, Emanuel Braga, and Telma Martins de Araújo. "Digital models: How can dental arch form be verified chairside?" Dental Press Journal of Orthodontics 22, no. 6 (November 2017): 68–73. http://dx.doi.org/10.1590/2177-6709.22.6.068-073.oar.

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ABSTRACT Introduction: Plaster dental casts are routinely used during clinical practice to access maxillary dental arch form and assist on fabrication of individualized orthodontic archwires. Recently introduced, digital model technology may offer a limitation for the obtainment of a dental physical record. In this context, a tool for dental arch form assessment for chairside use is necessary when employing digital models. In this regard, paper print of the dental arch seems thus to be useful. Methods: In the present study, 37 lower arch models were used. Intercanine and intermolar widths and dental arch length measurements were performed and compared using plaster dental casts, digital models and paper print image of the models. Ortho Insight 3D scanner was employed for model digitalization. Results: No statistically significant differences were noted regarding the measurements performed on the plaster or digital models (p> 0.05). Paper print images, however, showed subestimated values for intercanine and intermolar widths and overestimated values for dental arch length. Despite being statistically significant (p< 0.001), the differences were considered clinically negligible. Conclusion: The present study suggests that paper print images obtained from digital models are clinically accurate and can be used as a tool for dental arch form assessment for fabrication of individualized orthodontic archwires.

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Sofyanti, Ervina, Trelia Boel, Denny Satria, Zuriyah Fionita Ritonga, and Indah Hafniar Hasibuan. "Differences in dental arch characteristics between genders in patients with suspected condylar hyperplasia in a North Sumatra subpopulation: a cross-sectional study." F1000Research 9 (June 12, 2020): 263. http://dx.doi.org/10.12688/f1000research.22780.3.

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Анотація:

Background: Condylar Hyperplasia (CH) is a self-limiting mandibular condyle disorder that shows asymmetry progress in conjunction with associated occlusal changes as long as condylar growth is still active and leads to facial asymmetry. This study aimed to analysis the difference of dental arch characteristics based on genders in orthodontic patients with suspected CH in a North Sumatra subpopulation. Methods: This is a retrospective study of suspected CH patient’s clinical records who sought for the initial orthodontic treatment between January 2015 to March 2019. Patient with facial asymmetry (based on photography, posterior crossbite and midline deviation), the positive temporomandibular joint disorder in functional analysis, and no history of facial trauma were included in the study. Dental arch asymmetry was based on the measurement of dental midline deviation, canine tip in the dental arch, the distance of the upper canines from the palatal suture, and inter canine distance. The evaluation of dental arch was achieved by comparing arch width and length. Results: There was a significant difference (p<0.05) of upper canine distance from the palatal suture in female patients when evaluating upper dental arch asymmetry. There was a moderate correlation (r=0.379) in midline deviation between upper and lower dental arch. The dimension and dental arch form were mid and flat, and there was moderate correlation (r=0.448) between the upper and lower dental arch form in these suspected CH patients. Conclusion: Indeed skeletal asymmetry, the evaluation of the dental arch characteristic symmetry and arch form showed asymmetric occlusal characteristics in orthodontics patient with suspected CH in the North Sumatera subpopulation. In treating these patients, we recommend the plaster cast evaluation as essential and routine procedure in order to understand the complexity of occlusal change due to active growth of condylar and limitation in radiography evaluation.

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Pugliese, Fernando, Juan Martin Palomo, Louise Resti Calil, Arthur de Medeiros Alves, José Roberto Pereira Lauris, and Daniela Garib. "Dental arch size and shape after maxillary expansion in bilateral complete cleft palate: A comparison of three expander designs." Angle Orthodontist 90, no. 2 (August 30, 2019): 233–38. http://dx.doi.org/10.2319/020219-74.1.

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ABSTRACT Objective: The objective of this study was to compare the effects on upper dental arch size and shape after maxillary expansion with Hyrax, Quad-helix, and a differential opening expander in bilateral cleft lip and palate (BCLP) patients. Materials and Methods: Seventy-five BCLP patients were divided into three groups: Hyrax (H), Quad-helix (QH), and Expander with differential opening (EDO). Digital models were obtained before (T1) and after 6 months (T2) of maxillary expansion. Twelve landmarks were placed by one investigator on T1 and T2 dental models of each group, and x,y coordinates for each landmark were collected. For dental arch size analysis, centroid size of each dental arch at T1 and T2 was calculated from raw coordinates and was used as the measure of size. Procrustes Analysis was performed for dental arch shape analysis. Analysis of variance was used to compare the groups for size and shape differences (P < .05). Results: There were no significant dental arch size differences among the expanders at T1 or T2. Differences in arch shape were found between all groups at T2. Intragroup arch shape showed a significant variation for the QH and EDO groups. while it remained stable in the H group. Conclusions: Both the QH and the EDO create dental arch shape changes with greater intercanine than intermolar increase. The H does not change the dental arch shape.

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Girish Babu, KL, Geeta Maruti Doddamani, and Gururaj Hebbar Kavyashree. "Dental arch characteristics among South Indian twins." Brazilian Journal of Oral Sciences 21 (March 9, 2022): e225388. http://dx.doi.org/10.20396/bjos.v21i00.8665388.

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Genetic and environmental factors are essential in occlusal variations and malocclusion and have been of considerable interest to orthodontists. Studies on twin pairs are one of the most effective methods for investigating genetically determined occlusal variables. Many studies have focused on distances between first molars or between canines but malocclusions can also occur in other regions of the dental arch. Aim: To evaluate the characteristics of the dental arch between pairs of Monozygotic (MZ) and Dizygotic (DZ) twins from Southern India. Methods: A random sample of 51 twin pairs (12–18years old) participated in this study. The zygosity of twin pairs was recorded by facial appearance. The occlusion of the first permanent molars was recorded according to Angle’s classification. Study models were prepared to assess dental arch characteristics (i.e., arch form, arch perimeter, arch length; intercanine, intermolar width, and teeth size discrepancy). The obtained data was statistically analyzed using SPSS software 19.0. The student’s t-test (two-tailed, independent) and Chi-square test was used to determine the significance of studied parameters. Results: Angle’s Class I molar relation was more commonly observed followed by the Class II molar relationship among twins. The measured dental arch dimensions did not show a statistically significant difference among twin pairs. The ovoid arch form was commonly observed among Monozygotic and Dizygotic Twins. There was a similarity among MZ and DZ twins in the anterior and overall Bolton’s ratio. Conclusion: There were similar occurrences of measured parameters among twins, which showed genetic predominance in the expression of measured dental arch traits.

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Sreenivasan, Prem K., and Kakarla V. V. Prasad. "Distribution of dental plaque and gingivitis within the dental arches." Journal of International Medical Research 45, no. 5 (August 10, 2017): 1585–96. http://dx.doi.org/10.1177/0300060517705476.

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Objective The natural accumulation of supragingival plaque on surfaces of human teeth is associated with gingival inflammation and the initiation of common oral diseases. This study evaluated the distribution of dental plaque and gingivitis scores within the dental arches after prophylaxis. Methods Adult subjects from the Dharwad, India area representing the general population who provided written informed consent were scheduled for screening. Healthy subjects over the age of 18 years, not currently requiring any medical or dental care, and presenting with a complement of at least 20 natural teeth were recruited for this parallel design study. Enrolled subjects (n = 41) underwent oral examinations for dental plaque (PI) and gingivitis (GI) using the Turesky modification of the Quigley-Hein and the Löe-Silness Index, respectively, at the baseline visit, followed by a whole mouth dental prophylaxis. Subjects were given fluoride toothpaste for twice daily oral hygiene for the next 30 days. Subjects were recalled on days 15 and 30 for PI and GI examinations identical to baseline. Results Analyses indicated that mean scores for PI and GI on either arch and the whole mouth were higher than 2 and 1, respectively, during all examinations. Anterior surfaces consistently exhibited lower PI scores than posterior regions of either arch, or the entire dentition. Regional GI differences within the dentition were similar to PI scores, with lower scores on anterior than posterior teeth. Prophylaxis reduced both the frequency and mean scores of both PI and GI, irrespective of arch, with lower scores observed on anterior than posterior regions during all recall visits. Molar and lingual regions consistently exhibited higher PI and GI scores compared with anterior surfaces. At all examinations, mean scores for both plaque and gingivitis were higher on approximal vestibular than mid-vestibular surfaces. Conclusions Differences observed in PI and GI within the dentition have several practical implications: (a) there are advantages of whole mouth assessments for oral health (b) a need for oral hygiene formulations to reduce the larger deposits of dental plaque in the posterior region and resultant gingival inflammation, and (c) a requirement for ongoing oral hygiene education.

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Ivanyuta, Oleg, Ghamdan Al-Haraz, Dmitry Domenyuk, Sergei Dmitrienko, Stanislav Domenyuk, Sergey Ivanyuta, and Dmitry Kuleshov. "MODIFICATION OFTHE DENTAL ARCH SHAPE USING GRAPHIC REPRODUCTION METHOD AND ITS CLINICALEFFECTIVENESS IN PATIENTS WITH OCCLUSION ANOMALIES." Archiv Euromedica 10, no. 4 (December 17, 2020): 181–90. http://dx.doi.org/10.35630/2199-885x/2020/10/4.42.

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Based on the results of the dentoalveolar system morphometry performed in patients with permanent teeth physiological occlusion we have developed a method for studying the anterior dental arch. It follows the circle of geometry patterns as well as stable values in the medialdistal dimensions of the front teeth crowns. In view of the mesial-distal dimensions of 14 teeth and dental arch width between the second molars and individually built radius of the circle we modified the method of dental arches graphic reproduction. The first stage of the dental arch individual shape graphic reproduction implies designing a dental pentagon, whereas its base is the width of the dental arch between the second molars, and the median sagittal line determines the depth of the dental arch. The upper sides of the pentagon (incisor-canine diagonals) run from the central interincisal point to the canine point, while the lower sides (canine-molar diagonals) connect the canine points to the molar points. At the second stage of the dental arch individual shape graphic reproduction, a circle is outlined, whose radius is related directly to the width of the anterior dental arch, and has an inverse relationship with its depth. There is a proof offered for clinical feasibility of the method employed to predict the optimal individual shape of the dental arch through graphic reproduction in patients with class I Angel occlusion issues. The study showed that the effectiveness of therapeutic and diagnostic measures for patients with abnormal shape and size of dental arches. It can be achieved if the sequence of the graphic construction stages is strictly followed.

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Shrestha, Rabindra Man. "Polynomial Analysis of Dental Arch Form of Nepalese Adult Subjects." Orthodontic Journal of Nepal 3, no. 1 (December 5, 2013): 7–13. http://dx.doi.org/10.3126/ojn.v3i1.9267.

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Introduction: Human dental arch acquires stable form and dimensions with the attainment of adulthood. The orthodontic treatment regimen signifies the predetermination of the shape and type of dental arch form of a particular adult population to harmonize with their natural pattern. The use of predetermined arch form helps in diagnosis, treatment planning and stability of orthodontic treatment results. Objective: To analyze the dental arch forms of Nepalese adults and to classify them into morphological types. Materials & Method: Predetermined transverse and sagittal dimensions on dental stone models of one hundred Nepalese adults aged 17-32 years with normal occlusion and dentofacial proportion were measured using standardized Boley gauze. The analysis was done according to Raberin’s mathematical sixth degree polynomial method. The study compared the gender difference among the Nepalese samples. Result: The distribution of the Nepalese arch form types were; 26% flat arch, 24% wide arch, 19% pointed arch, 18% narrow arch and 13% mid arch. Conclusion: Considerable variation in distribution of dental arch form types found between Nepalese male and female samples and among population groups. The analysis enables the mathematical method that predetermines the dental arch form of the individual orthodontic patient.DOI: http://dx.doi.org/10.3126/ojn.v3i1.9267 Orthodontic Journal of Nepal, Vol.3, No.1, 2013: 7-13

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Mauad, Bruno Aldo, Robson Costa Silva, Mônica Lídia Santos de Castro Aragón, Luana Farias Pontes, Newton Guerreiro da Silva Júnior, and David Normando. "Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment." Dental Press Journal of Orthodontics 20, no. 3 (June 2015): 64–68. http://dx.doi.org/10.1590/2176-9451.20.3.064-068.oar.

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OBJECTIVE: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. METHODS: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). RESULTS: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). CONCLUSION: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life.

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Sabina Poudel, Prabhat Shrestha, Lochana Acharya, and Sijan Poudyal. "ASSESSMENT OF NEPALESE PROSTHODONTIST’S ATTITUDE TOWARDS MORPHOLOGICAL COMPLETENESS OF DENTAL ARCHES IN PARTIALLY DENTATE OLDER PATIENTS." Journal of Chitwan Medical College 10, no. 1 (March 14, 2020): 74–77. http://dx.doi.org/10.54530/jcmc.146.

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Background: Complete dentition is not always appropriate for old aged medically compromised and financially weak individuals. It is the dentist to decide what minimum number of teeth should be restored to have the proper oral function. The aim was to find out the opinion of prosthodontists of Nepal regarding the suitability of shortened dental arch as treatment modality and how frequently is this treatment choice for an old aged Nepalese patient. Methods: A pretested close ended questionnaire was usedin this study.After taking ethical clearance from Nepal Health Research Council, online questionnaire was sent to the participants along with the consent. Analysis was done using SPSS (version 21) statistical software package. Descriptive statistics was used. Percentage and frequencies were calculated. Results: Among respondents, 96.2% (n=51) had heard about shortened dental arch therapy but 3.8 % (n=2) had never heard about it. Forty-two (79.2%) do support shortened dental arch. Eleven (20.8%) do not favorshortened dental arch. Their main reason for replacing molars was to improve masticatory function.Instead of shortened dental arch,n=5(45.5%) prefer cast partial denture and 6(54.5%) advice implant supported fixed prosthesis. Among Prosthodontists who recommended shortened dental arch therapy, eight (19.1%) always advised patients not to replace molars. Twenty-four (57.1%) prosthodontists who support shortened dental arch therapy mentioned chewing function in shortened dental arch patients as satisfactory. Conclusions: Majority of Prosthodontists agree that shortened dental arch is a suitable treatment option for older people in developing countries like Nepal. But the treatment is not employed in clinical practice as required.

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Poudel, Sabina, Prabhat Shrestha, Lochana Acharya, and Sijan Poudyal. "Assessment of Nepalese prosthodontist’s attitude towards morphological completeness of dental arches in partially dentate older patients." Journal of Chitwan Medical College 10, no. 1 (March 15, 2020): 74–77. http://dx.doi.org/10.3126/jcmc.v10i1.28077.

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Background: Complete dentition is not always appropriate for old aged medically compromised and financially weak individuals. It is the dentist to decide what minimum number of teeth should be restored to have the proper oral function. The aim was to find out the opinion of prosthodontists of Nepal regarding the suitability of shortened dental arch as treatment modality and how frequently is this treatment choice for an old aged Nepalese patient. Methods: A pretested close ended questionnaire was usedin this study.After taking ethical clearance from Nepal Health Research Council, online questionnaire was sent to the participants along with the consent. Analysis was done using SPSS (version 21) statistical software package. Descriptive statistics was used. Percentage and frequencies were calculated. Results: Among respondents, 96.2% (n=51) had heard about shortened dental arch therapy but 3.8 % (n=2) had never heard about it. Forty-two (79.2%) do support shortened dental arch. Eleven (20.8%) do not favorshortened dental arch. Their main reason for replacing molars was to improve masticatory function.Instead of shortened dental arch,n=5(45.5%) prefer cast partial denture and 6(54.5%) advice implant supported fixed prosthesis. Among Prosthodontists who recommended shortened dental arch therapy, eight (19.1%) always advised patients not to replace molars. Twenty-four (57.1%) prosthodontists who support shortened dental arch therapy mentioned chewing function in shortened dental arch patients as satisfactory. Conclusions: Majority of Prosthodontists agree that shortened dental arch is a suitable treatment option for older people in developing countries like Nepal. But the treatment is not employed in clinical practice as required.

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Choi, Y., E. Jeong, H. Oh, K. Kim, Y. Jung, J. Jeong, Y. Cho, and K. Lee. "Feasibility of dental panoramic radiography for dental arch evaluation in small animals." Veterinární Medicína 62, No. 1 (January 27, 2017): 29–34. http://dx.doi.org/10.17221/18/2016-vetmed.

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The purpose of this study was to evaluate the feasibility of dental panoramic radiography for dental arch evaluation in small animals. The dental arches of four Beagles, one Shih Tzu dog, and three Korean short-haired cats were radiographed using human panoramic X-rays. All animals were under general anaesthesia during the examination. The animals’ heads were placed horizontal to the panoramic device, just as a human’s head is placed in panoramic dental assessments. All animals were evaluated with an open and closed mouth view (human view). In the closed mouth view, the animal was provided a bite blocker for proper placement of the oral cavity. The open mouth view angle was approximately 30–45°. The maxilla and mandible were held in position with radiolucent 3M tape. The standard scoring measurement was performed based on visibility of the tooth root and the sharpness of the dento-alveolar margin. No significant differences in scoring were noticed between the two positions. The visibility of teeth roots in Beagles was far better than that in the Shih Tzu dogs and two Korean short-haired cats. In addition, the Beagle series showed sharp dento-alveolar margin scores. These results suggest that human panoramic dental X-rays represent a possible dental evaluation tool for animals with large skulls.

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