Articoli di riviste: "Maxilla Surgery"

1

Hazrati, Ezatollah, e Ezatollah Hazrati. "MAXILLA". Plastic and Reconstructive Surgery 106, n. 6 (novembre 2000): 1442. http://dx.doi.org/10.1097/00006534-200011000-00060.

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Gunaseelan, R. "Anterior maxillary segmental distraction in cleft maxilla". International Journal of Oral and Maxillofacial Surgery 34 (gennaio 2005): 42. http://dx.doi.org/10.1016/s0901-5027(05)81034-3.

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Lundgren, Stefan, Elisabeth Nyström, Hans Nilson, Johan Gunne e Ove Lindhagen. "Bone grafting to the maxillary sinuses, nasal floor and anterior maxilla in the atrophic edentulous maxilla". International Journal of Oral and Maxillofacial Surgery 26, n. 6 (dicembre 1997): 428–34. http://dx.doi.org/10.1016/s0901-5027(97)80007-0.

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Liao, Yu-Fang, e Michael Mars. "Long-Term Effects of Clefts on Craniofacial Morphology in Patients with Unilateral Cleft Lip and Palate". Cleft Palate-Craniofacial Journal 42, n. 6 (novembre 2005): 601–9. http://dx.doi.org/10.1597/04-163r.1.

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Objective To identify the long-term effects of clefts (intrinsic and functional) on craniofacial growth and to evaluate the possible association between the sizes of the cleft maxillary segment (intrinsic) and alveolar cleft (functional) and the craniofacial morphology in patients with unilateral cleft lip and palate (UCLP). Design Retrospective case-control study. Setting Sri Lankan Cleft Lip and Palate Project. Subjects Thirty unoperated adult patients with UCLP and 52 normal controls. Main Outcome Measures Maxillary dental cast was used to measure the sizes of the cleft maxillary segment and alveolar cleft. Cephalometry was used to determine craniofacial morphology. Results Patients with UCLP had shorter height of the basal maxilla, shorter posterior length of the basal maxilla, and less protruded basal maxilla at the zygomatic level than did control subjects. In patients with UCLP, the posterior height of the basal maxilla was related to the size of the cleft maxillary segment, and there was a tendency toward significant association between the anterior height of the basal maxilla and the size of the alveolar cleft. Conclusion The adverse effects of clefts on the growth of the maxilla in patients with UCLP are restricted to the basal maxilla in size. This growth inhibition is major in height and minor in length. The reduced posterior height of the basal maxilla in unoperated patients with UCLP might be primarily attributed to intrinsic effects, whereas the reduced anterior height of the basal maxilla might be attributed to functional effects.

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Hazrati, Ezatollah. "ATROPHIC MAXILLA". Plastic and Reconstructive Surgery 110, n. 1 (luglio 2002): 377–78. http://dx.doi.org/10.1097/00006534-200207000-00109.

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Singhal, Ashok, R. C. Yadav, Ajay Kulkarni e A. K. Singhal. "Haemangioendothelioma maxilla". Indian Journal of Otolaryngology 42, n. 2 (giugno 1990): 73–74. http://dx.doi.org/10.1007/bf02993196.

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Mishra, Anupam, Naresh Bhatia e G. K. Shukla. "Fibromyxoma maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 56, n. 4 (ottobre 2004): 293–95. http://dx.doi.org/10.1007/bf02974391.

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Geckili, Onur, Hakan Bilhan, Gulsum Ceylan e Altug Cilingir. "Edentulous Maxillary Arch Fixed Implant Rehabilitation Using a Hybrid Prosthesis Made of Micro-Ceramic-Composite: Case Report". Journal of Oral Implantology 39, n. 1 (1 febbraio 2013): 115–20. http://dx.doi.org/10.1563/aaid-joi-d-10-00040.

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The prosthetic treatment of patients with an edentulous maxilla opposing mandibular natural teeth is one of the most challenging endeavors that face clinicians. Occlusal forces from the opposing natural teeth may cause fractures in the maxillary prosthesis and also result in advanced bone loss of the edentulous maxilla. With the presence of extreme gagging reflex, the treatment may become more complicated. This article describes and illustrates the 2-stage surgical and prosthetic treatment of a patient with an edentulous maxilla opposing natural teeth. In the beginning, the patient was treated with 4 implants and a maxillary implant-supported overdenture. The extreme gagging reflex and the occlusal forces from the mandibular natural teeth obligated the team a second stage surgical and prosthetic treatment, which included increasing the number of implants after bilateral sinus lifting in the posterior maxilla and fabricating a maxillary fixed hybrid prosthesis made of micro-ceramic composite that yielded a satisfactory result.

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Flanagan, Dennis. "A Comparison of Facial and Lingual Cortical Thicknesses in Edentulous Maxillary and Mandibular Sites Measured on Computerized Tomograms". Journal of Oral Implantology 34, n. 5 (1 ottobre 2008): 256–58. http://dx.doi.org/10.1563/0.915.1.

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Abstract Edentulous ridges suitable for implant treatment depend on cortical bone for implant stability, especially for ridge-expansion procedures. This study was done to find and compare the actual thicknesses of the facial and lingual edentulous cortices of the maxilla and mandible as measured on computerized tomograms. The collected computerized tomographs (CT) of one implantologist's practice (D.F.) were measured. The measurements taken demonstrated that the edentulous lingual cortex is almost always thicker than the facial cortex in the maxilla and mandible. The combined maxillary and mandibular facial cortices measurement sites average was 1.79 mm. The combined maxillary and mandibular lingual cortices measurement sites average was 2.33 mm. The average cortical thickness measurement of the maxillary facial cortices was 1.66 mm. The lingual maxillary average was 2.16 mm. The mandibular facial cortical sites averaged 1.83 mm, while the lingual cortical sites were 2.40 mm. These data confirm that the lingual cortex of the maxilla and mandible is thicker than the facial cortex at a ratio of 1:1.3. This ratio was consistent for maxilla and mandible.

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De Temmerman, Griet, Bart Falter, Serge Schepers, Luc Vrielinck, Johan Orye e Constantinus Politis. "The Use of a Kirschner Wire in the Treatment of a Comminuted Le Fort I Fracture: A Case Report". Craniomaxillofacial Trauma & Reconstruction 4, n. 4 (dicembre 2011): 217–22. http://dx.doi.org/10.1055/s-0031-1293517.

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Simultaneous fracture of the maxilla and cervical vertebrae rarely occurs in bicycling accidents. The following case report describes a simple technique for closed reduction of a severely comminuted maxillary fracture with shattering of the dentoalveolar process. The combination of a rigid external distractor halo frame on the skull, a Kirschner wire through the maxilla, and an intermaxillary wire fixation resulted in stable vertical and sagittal correction of the fragmented maxilla with adequate access and minimal manipulation and without necessitating removal of the cervical collar.

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Yanai, Akira. "MANDIBLE AND MAXILLA". Plastic and Reconstructive Surgery 106, n. 3 (settembre 2000): 746. http://dx.doi.org/10.1097/00006534-200009030-00057.

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Kumar, B., e S. Nair. "Maxilla in SFOA". International Journal of Oral and Maxillofacial Surgery 48 (maggio 2019): 110. http://dx.doi.org/10.1016/j.ijom.2019.03.335.

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Kieserman, Stefan P., Paul Baker e Robert Eberle. "Ameloblastoma of the Maxilla: A Series of Three Cases". Otolaryngology–Head and Neck Surgery 116, n. 3 (marzo 1997): 395–98. http://dx.doi.org/10.1016/s0194-59989770281-x.

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Ameloblastoma is an aggressive tumor of the maxilla. We reviewed several ameloblastomas of the maxilla that had been surgically removed. The English literature was reviewed to evaluate the appropriate treatment and success with these aggressive tumors. Maxillary ameloblastoma is a tumor that can behave malignantly. There is a definite correlation between histopathologic appearance and tumor activity. The unicystic type of ameloblastoma responds well to complete resection. The treatment for an ameloblastoma of the maxilla is radical resection. Limited removal of the cyst/tumor initially is not adequate, and a secondary operation will be required. Ameloblastoma of the maxilla requires aggressive radical excision at the time of initial diagnosis.

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Tindlund, Rolf S. "Skeletal Response to Maxillary Protraction in Patients with Cleft Lip and Palate before Age 10 Years". Cleft Palate-Craniofacial Journal 31, n. 4 (luglio 1994): 295–308. http://dx.doi.org/10.1597/1545-1569_1994_031_0295_srtmpi_2.3.co_2.

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Over the last 15 years, cleft lip and palate (CLP) patients with maxillary deficiency in the care of the Bergen CLP Team have received interceptive orthopedic treatment to correct anterior and posterior crossbites during the deciduous and mixed dentition periods. The present study comprises 72 subjects of various cleft types with anterior crossbite, treated to an acceptable positive overjet by maxillary protraction using a facial mask (Delaire). Lateral cephalograms were taken immediately before and after the active treatment periods. Individuals exhibiting a favorable (fair) skeletal response to the protraction were compared with those who revealed little, (poor) skeletal response. Two cephalometric variables were chosen for the evaluation of the sagittal skeletal treatment changes: (1) the sagittal maxillomandibular change (change of angle ss-n-sm [ANB]); and (2) the forward movement of the maxilla (change of distance NSP-maxp), where maxp (maxillary point) represents the anterior contour of maxilla and NSP is the perpendicular to the naslon-sella-line (NSL) through sella. A numerical change greater than or equal to the value 1.5 (degrees or mm, respectively) was classified as fair versus poor response revealing a change less than 1.5. Fair-response (favorable response) of sagittal maxillomandibular change was found in 63 % of the cases (mean increase of angle ANB was 3.3 degrees), more often when protraction started early. The length of maxilla was increased, the skeletal maxilla was moved forward 1.8 mm, the upper dentition advanced 3.6 mm, the occlusal line was clockwise rotated, and the anterior face height was increased. Similarly, fair-response of forward movement of maxilla was found in 44% of the cases (mean increase of distance NSP-maxp was 2.4 mm), more often when protraction was started early and after long treatment duration. The maxillary prognathism increased 1.8 degrees, the angle ANB increased 3 degrees, the length of maxilla increased 1.5 mm, and the upper dentition was advanced 3.7 mm. The anterior face height increased with counterclockwise rotation of the nasal line, whereas the occlusal line was clockwise rotated. A paired fair-response of both skeletal maxillomandibular change and skeletal forward movement of maxilla was found in 35% of the cases. During protraction the mean increase of maxillary prognathism was 2.1 degrees, the maxilla moved forward 3.1 mm, the maxillary dentition advanced 4.3 mm, the maxillary length increased 1.9 mm, the ANB angle increased 3.7 degrees, and the lower anterior facial height increased 3.4 mm.

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Sheikhi, Mahnaz, Abbas Haghighat, Neda Lourizadeh, Hosein Tavangar e Parmida Aryaee. "Evaluation of the effect of direct sinus lift surgery on maxillary sinus volume by Mimics software". National Journal of Maxillofacial Surgery 14, n. 2 (2023): 198–207. http://dx.doi.org/10.4103/njms.njms_155_22.

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ABSTRACT Introduction: Sinus lift surgery allows sufficient volume of bone to be created in the posterior part of the maxilla. The aim of this study was to investigate the changes in maxillary sinus volume after a sinus lift and the rate of increase in ridge height at the site of the graft. Methods: Eleven patients were chosen for sinus lift from among those who were referred to the radiology department for implant placement in the posterior region of the maxilla and whose bone height at the posterior of the maxilla was less than 4 mm on the cone-beam computed tomography (CBCT) image. The sinus volume was measured after importing the CBCT file in DICOM format into Mimics software. After determining the sinus volume, the patients underwent sinus lift surgery, and the amount of material used during the surgery was measured. After the time required to repair the area, the CBCT image was taken again. Then, the changes in the volume of the maxillary sinus and the increase in the height of the maxillary ridge at the surgical site were calculated. Then, the second stage of the surgery was performed to place the implant at the implant site. Results: For an average of 1.40 cm3 of material, the rate of increase in ridge height was 10.52 mm, and the average change in sinus volume was 1.19 cm3. Conclusions: CBCT images and Mimics software have many applications in examining and predicting parameters before and after sinus lift surgery.

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Kademani, Deepak. "Le Fort Maxillary Swing Procedure for Posterior Maxilla Tumor Extirpation". Journal of Oral and Maxillofacial Surgery 65, n. 5 (maggio 2007): 1055–58. http://dx.doi.org/10.1016/j.joms.2005.12.044.

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Huang, Chiung-Shing, Pandurangan Harikrishnan, Yu-Fang Liao, Ellen W. C. Ko, Eric J. W. Liou e Philip K. T. Chen. "Long-term Follow-up after Maxillary Distraction Osteogenesis in Growing Children with Cleft Lip and Palate". Cleft Palate-Craniofacial Journal 44, n. 3 (maggio 2007): 274–77. http://dx.doi.org/10.1597/06-104.

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Objective: To evaluate the changes in maxillary position after maxillary distraction osteogenesis in six growing children with cleft lip and palate. Design: Retrospective, longitudinal study on maxillary changes at A point, anterior nasal spine, posterior nasal spine, central incisor, and first molar. Setting: The University Hospital Craniofacial Center. Main Outcome Measure: Cephalometric radiographs were used to measure the maxillary position immediately after distraction, at 6 months, and more than 1 year after distraction. Results: After maxillary distraction with a rigid external distraction device, the maxilla (A point) on average moved forward 9.7 mm and downward 3.5 mm immediately after distraction, moved backward 0.9 mm and upward 2.0 mm after 6 months postoperatively, and then moved further backward 2.3 mm and downward 6.8 mm after more than 1 year from the predistraction position. Conclusion: In most cases, maxilla moved forward at distraction and started to move backward until 1 year after distraction, but remained forward, as compared with predistraction position. Maxilla also moved downward during distraction and upward in 6 months, but started descending in 1 year. There also was no further forward growth of the maxilla after distraction in growing children with clefts.

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Mannucci, Nicola, Ornella D'orto, Federico Biglioli e Roberto Brusati. "Comparison of the Effect of Supraperiosteal versus Subperiosteal Dissection on the Growing Rabbit Maxilla". Cleft Palate-Craniofacial Journal 39, n. 1 (gennaio 2002): 36–39. http://dx.doi.org/10.1597/1545-1569_2002_039_0036_coteos_2.0.co_2.

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Objective To achieve closure of wide unilateral cleft lip repair without tension of the cleft lip margins, a large undermining, especially of the anterolateral surface of the maxilla, is needed. Two types of dissection are feasible: supraperiosteal or subperiosteal. The aim of this study was to investigate whether there are differences in maxillary growth between healthy rabbits after supraperiosteal or subperiosteal dissection. Methods Twenty-four male 7-week-old New Zealand white rabbits were divided randomly into three groups: eight control animals (untreated); eight animals undergoing supraperiosteal dissection of the left surface of the maxilla, and eight animals undergoing subperiosteal dissection of the left surface of the maxilla. All of the treated animals were operated on by the same surgeon at age of 7 weeks and sacrificed at 27 weeks together with control group animals. Seven cephalometric measures (representing aspects of maxillary length, width, and height), on the left side, were taken on the cleaned skull of the rabbits, and the results were analyzed statistically. Results No significant differences in maxillary growth were noted across the three study groups. Conclusions The supraperiosteal or subperiosteal undermining of the anterolateral surface of the maxilla does not seem to interfere with the growth of the normal maxilla in the rabbit.

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Kfir, Efraim, Vered Kfir, Moshe Goldstein, Ziv Mazor e Edo Kaluski. "Minimally Invasive Subnasal Elevation and Antral Membrane Balloon Elevation Along With Bone Augmentation and Implants Placement". Journal of Oral Implantology 38, n. 4 (1 agosto 2012): 365–76. http://dx.doi.org/10.1563/aaid-joi-d-10-00129.

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Atrophic edentulous anterior maxilla is a challenging site for implant placement and has been successfully treated surgically by anterior maxillary osteoplasty. This procedure is associated with considerable discomfort, morbidity, and cost—and consequently reduced patient acceptance. The efficacy and safety of minimally invasive bone augmentation of the posterior maxilla has not been extended thus far to the anterior subnasal maxilla. We present 2 representative cases in which minimally invasive subnasal floor elevation was performed along with minimally invasive antral membrane balloon elevation. Both segments underwent bone grafting and implant placement during the same sitting. Minimally invasive anterior maxilla bone augmentation appears to be feasible. Designated instruments for alveolar ridge splitting and nasal mucosa elevation are likely to further enhance this initial favorable experience.

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Kundu, I. N., A. K. Saha e S. N. Ganguh. "Prognoma of maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 52, n. 3 (luglio 2000): 292–93. http://dx.doi.org/10.1007/bf03006209.

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Kabir, D., C. K. Banerjee e S. B. S. Mann. "Fibromyxoma of maxilla". Indian Journal of Otolaryngology 37, n. 1 (marzo 1985): 16. http://dx.doi.org/10.1007/bf02994941.

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Mishra, S. K., P. K. Dash, P. Keshri, S. Jena e S. Sur. "Myxoma of maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 55, n. 1 (marzo 2003): 28–29. http://dx.doi.org/10.1007/bf02968749.

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Hayath, M. Sikinder, G. Rami Reddy, M. Janaki, D. Kabeer, A. Seshu Prasad, Nagesh, C. Mohan Rao e Purandar Pandu Rangaiah. "Myxoma of maxilla". Indian Journal of Otolaryngology and Head & Neck Surgery 50, n. 4 (ottobre 1998): 377–78. http://dx.doi.org/10.1007/bf03000692.

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Whitt, J., C. Dunlap, J. Sheets e M. Thompson. "Keratoameloblastoma of Maxilla". Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 103, n. 4 (aprile 2007): e24-e25. http://dx.doi.org/10.1016/j.tripleo.2006.12.057.

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Pietzka, S., F. Mascha, K. Winter, P. W. Kämmerer, A. Sakkas, A. Schramm e F. Wilde. "Clinical Accuracy of 3D-Planned Maxillary Positioning Using CAD/CAM-Generated Splints in Combination With Temporary Mandibular Fixation in Bimaxillary Orthognathic Surgery". Craniomaxillofacial Trauma & Reconstruction 13, n. 4 (17 agosto 2020): 290–99. http://dx.doi.org/10.1177/1943387520949348.

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Study Design: The aim of this study was to evaluate the accuracy of 3-dimensional (3D)-planned maxillary positioning by using computer-assisted design (CAD)/computer-assisted manufacturing (CAM) splints combined with temporary mandibular fixation in bimaxillary orthognathic surgery. In orthognathic surgery, customized splints work sufficiently well to transfer preoperative planning into the operation site for transverse und sagittal positioning of the maxilla. The vertical positioning is more difficult due to the non-fixed mandibular reference. Therefore, the combined use of CAD/CAM splints and temporary mandibular fixation to the zygomatic region was applied for transferring the 3D-planned maxillary position into the operation site from 2012 until 2015 in our hospital. Objective: In addition to the general accuracy, the precision should therefore be checked especially in the vertical plane compared to axial and sagittal plane. Methods: In this retrospective study, we calculated the deviation of 5 occlusal landmarks of the maxilla in 35 consecutive patients by fusing preoperative 3D planning images and postoperative computed tomography scans after bimaxillary surgery. Results: The overall median deviation of maxillary positioning between plan and surgical result was 0.99 mm. The accuracy of left–right positioning was median 0.96 mm. Anterior–posterior positioning of the maxilla showed a median accuracy of 0.94 mm. Just slightly higher values were determined for the upward–downward positioning (median 1.06 mm). Conclusions: This demonstrates the predictability of maxillary positioning by using CAD/CAM splints in combination with temporary mandibular fixation in all 3 axes.

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Acocella, Alessandro, Roberto Sacco, Paolo Nardi e Tommaso Agostini. "Early Implant Placement in Bilateral Sinus Floor Augmentation Using Iliac Bone Block Grafts in Severe Maxillary Atrophy: A Clinical, Histological, and Radiographic Case Report". Journal of Oral Implantology 35, n. 1 (1 gennaio 2009): 37–44. http://dx.doi.org/10.1563/1548-1336-35.1.37.

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Abstract Effectively restoring a grossly atrophic maxilla can be difficult for the implant surgeon. The placement of dental implants in patients who are edentulous in the posterior maxilla can present difficulties because of deficient posterior alveolar ridge and increased pneumatization of the maxillary sinus, resulting in a minimal hard tissue bed. Implant placement requires adequate quality and quantity of bone, especially in the posterior maxilla. Insufficient bone height and width in this area of the maxilla, because of expansion of the maxillary sinus and atrophic reduction of the alveolar ridge, represents a contraindication for conventional insertion of dental implants. The reconstruction of edentulous patients with adequate bone volume and density by the use of bone graft and, subsequently, the placement of dental implants has become a viable treatment option with high predictability. It is commonly shared that autologous bone graft is the gold standard grafting method in the augmentation of Higmoro antrum and in any kinds of guided bone regeneration. In this article, the authors report a case of severe maxillary atrophy that is augmented by block bone graft harvested from iliac crest. An early placement of implants is possible due to the quick healing of the site, as proven by histologic examinations.

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Kita, Hiroki, Shoko Kochi, Yoshimichi Imai, Atsushi Yamada e Tai Yamaguchi. "Rigid External Distraction Using Skeletal Anchorage to Cleft Maxilla United with Alveolar Bone Grafting". Cleft Palate-Craniofacial Journal 42, n. 3 (maggio 2005): 318–26. http://dx.doi.org/10.1597/03-152.1.

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Objective Documentation of the application of maxillary distraction osteogenesis using rigid external distraction (RED) with skeletal anchorage combined with predistraction alveolar bone grafting (ABG) in cleft maxilla. Design Case report. Patient A patient with numerous congenital missing teeth and severe maxillary deficiency related to complete bilateral cleft lip and palate with large alveolar bone defect. Intervention The patient received preoperative orthodontic treatment, predistraction ABG, and maxillary distraction osteogenesis using RED with skeletal anchorage. Results Predistraction ABG completely united the cleft maxilla. The united maxilla was successfully advanced by the RED system with skeletal anchorage, despite unsound dentition with numerous congenital missing teeth. Conclusion The present study demonstrates that the combination of predistraction ABG and RED system with skeletal anchorage is effective for the treatment of severe maxillary deficiency related to complete bilateral cleft lip and palate with large bone defect and numerous congenital missing teeth.

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Chung, Sean, Anthony McCullagh e Tassos Irinakis. "Immediate Loading in the Maxillary Arch: Evidence-Based Guidelines to Improve Success Rates: A Review". Journal of Oral Implantology 37, n. 5 (1 ottobre 2011): 610–21. http://dx.doi.org/10.1563/aaid-d-joi-10-00058.1.

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The reliability of immediately loaded dental implants in the mandible has prompted many to investigate their application in the maxilla. Although the body of literature is growing, the long-term survivability of immediate loading in the maxilla is still pending. This review of literature investigates the status of immediate loading of dental implants in the maxilla to determine its predictability as a treatment option for partial and complete maxillary edentulism. Current terminology in the field is summarized first. Subsequently, the rationale and advantages of immediate loading in the maxilla are reviewed, and the relationships between immediate loading and osseointegration, primary stability, implant design, micromotion, immediate implant placement, and bone character are explored. The importance of a prosthodontically driven implant treatment plan emphasizing the role of splinting a high-precision and passively fitting implant restoration with reduced micromotion under function is summarized. The reliability and predictability of immediately loaded implants as a treatment option are proposed, and recommended guidelines for the successful delivery of immediately loaded implants in the maxilla are presented.

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Yazici, Ilker, Tarik Cavusoglu, Ayhan Comert, Ibrahim Vargel, Mehtap Cavusoglu, Ibrahim Tekdemir e Maria Siemionow. "Maxilla Allograft for Transplantation". Annals of Plastic Surgery 61, n. 1 (luglio 2008): 105–13. http://dx.doi.org/10.1097/sap.0b013e318095a7a1.

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Caleffi, Edoardo, Stefano Toschi e Antonio Bocchi. "Myxoma of the Maxilla". Plastic and Reconstructive Surgery 93, n. 6 (maggio 1994): 1274–76. http://dx.doi.org/10.1097/00006534-199405000-00027.

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Langford, Angelika A., Hans R. Gelderblom, Matthias Unger e Peter A. Reichart. "Osteosarcoma of the maxilla". International Journal of Oral and Maxillofacial Surgery 20, n. 4 (agosto 1991): 232–35. http://dx.doi.org/10.1016/s0901-5027(05)80182-1.

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Nishi, Masahiro, Tamotsu Mimura e Ichiro Senba. "Leiomyosarcoma of the maxilla". Journal of Oral and Maxillofacial Surgery 45, n. 1 (gennaio 1987): 64–68. http://dx.doi.org/10.1016/0278-2391(87)90089-9.

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Han, Jeong Joon, Sang-Yoon Woo, Won-Jin Yi e Soon Jung Hwang. "Robot-Assisted Maxillary Positioning in Orthognathic Surgery: A Feasibility and Accuracy Evaluation". Journal of Clinical Medicine 10, n. 12 (11 giugno 2021): 2596. http://dx.doi.org/10.3390/jcm10122596.

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Several methods enabling independent repositioning of the maxilla have been introduced to reduce intraoperative errors inherent in the intermediate splint. However, the accuracy is still to be improved and a different approach without time-consuming laboratory process is needed, which can allow perioperative modification of unoptimized maxillary position. The purpose of this study is to assess the feasibility and accuracy of a robot arm combined with intraoperative image-guided navigation in orthognathic surgery. The experiments were performed on 12 full skull phantom models. After Le Fort I osteotomy, the maxillary segment was repositioned to a different target position using a robot arm and image-guided navigation and stabilized. Using the navigation and the postoperative computed tomography (CT) images, the achieved maxillary position was compared with the planned position. Although the maxilla showed mild displacement during the fixation, the mean absolute deviations from the target position were 0.16 mm, 0.18 mm, and 0.20 mm in medio-lateral, antero-posterior, and supero-inferior directions, respectively, in the intraoperative navigation. Compared with the target position using postoperative CT, the achieved maxillary position had a mean absolute deviation of less than 0.5 mm for all dimensions and the mean root mean square deviation was 0.79 mm. The results of this study suggest that the robot arm combined with the intraoperative image-guided navigation may have great potential for surgical plan transfer with the accurate repositioning of the maxilla in the orthognathic surgery.

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Kim, Hyo Seong, Ji Hwan Son, Jee Hyeok Chung, Kyung Sik Kim, Joon Choi e Jeong Yeol Yang. "Intraoperative blood loss and surgical time according to the direction of maxillary movement". Archives of Plastic Surgery 47, n. 5 (15 settembre 2020): 411–18. http://dx.doi.org/10.5999/aps.2020.00878.

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Background Excessive bleeding is one of the most severe complications of orthognathic surgery (OGS). This study investigated the associations of intraoperative blood loss and surgical time with the direction of maxillary movement.Methods This retrospective study involved patients who underwent OGS from October 2017 to February 2020. They were classified based on whether maxillary setback was performed into groups A1 and B1, respectively. Relative blood loss (RBL, %) was used as an indicator to compare intraoperative blood loss between the two groups. The surgical time of the two groups was also measured. Subsequently, the patients were reclassified based on whether posterior impaction of the maxilla was performed into groups A2 and B2, respectively. RBL and surgical time were measured in the two groups. Simple linear and multiple regression analyses were performed. P-values <0.05 were considered to indicate statistical significance.Results Eighteen patients were included. The RBL and surgical time for the groups were: A1, 13.15%±5.99% and 194.37±42.04 minutes; B1, 12.41%±1.89% and 196.50±46.07 minutes; A2, 13.94%±3.82% and 201.00±39.70 minutes; and B2, 9.61%±3.27% and 188.84±38.63 minutes, respectively. Only RBL showed a statistically significant difference between the two groups (A2 and B2, P=0.04).Conclusions Unlike maxillary setback, posterior impaction of the maxilla showed a significant association with RBL during surgery. When performing posterior impaction of the maxilla, clinicians need to pay particular attention to surgery and postoperative care.

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Wells, Mark D., Scott Oishi e Mustafa Sengezer. "Sagittal Fractures of the Palate: A New Method of Treatment". Canadian Journal of Plastic Surgery 3, n. 2 (giugno 1995): 23–32. http://dx.doi.org/10.1177/229255039500300205.

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A new technique is described for stabilizing complex vertical fractures of the maxilla. Advantageous use of the comminuted fracture pattern of the maxillary buttresses allows the maxilla to be divided into two parts at the Le Fort I level. with intermaxillary fixation applied, stabilization is achieved by applying miniplate fixation to the nasal side of the hard palate. The maxilla is reduced to the previously stabilized anterior midfacial buttresses with plates and screws. Comminuted segments of defects in the anterior buttresses are replaced with contoured calvarial grafts. This method has the advantage of maintaining transverse palatal width in a rigid fashion without the need for further osteotomies. It has satisfactorily restored preinjury occlusal relationships in six patients, without the need for dental splints. In no instance has hardware extrusion occurred after fixation.

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Ladeira, Bruna Ajuz, Felipe Raasch de Bortoli, André Luis Zétola e Marco Cesar Jorge dos Santos. "FUNGAL OSTEOMYELITIS OF THE MAXILLARY BONE AFTER NASAL SURGERY: CASE REPORT OF A RARE PRESENTATION". Journal of Contemporary Diseases and Advanced Medicine 1, n. 2 (1 agosto 2022): 61–66. http://dx.doi.org/10.14436/jcdam.1.2.061-066.oar.

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Maxillary osteomyelitis is defined as bone inflammation in the maxilla, initiated in the medullary cavities, with progression to the cortical portion and the Haversian system, which may affect the periosteum and soft tissues by contiguity. When comparing maxillary and mandibular osteomyelitis, it can be seen that the first is rarer, since maxilla has a thin cortical layer and an extensive network of collateral blood vessels, which together offer a protective role against bone infections. The main predisposing factor for the development of the disease is surgical intervention, a procedure that can cause the infection, more commonly associated with Staphilococcus aureus and epidermidis, and more rarely of fungal etiology.

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Vitkos, Evangelos N., Nefeli Eleni Kounatidou, Konstantinos Agoropoulos e Athanassios Kyrgidis. "Avascular necrosis of the maxilla after orthognathic surgery, a devastating complication? A systematic review of reported cases and clinical considerations". Acta Chirurgiae Plasticae 65, n. 3-4 (25 marzo 2024): 117–27. http://dx.doi.org/10.48095/ccachp2023117.

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Purpose: The purpose of this study was to collect and present all the available evidence regarding avascular maxillary necrosis following maxillary osteotomy for orthognathic surgery. Methods: We performed a systematic review of MEDLINE (via PubMed), Scopus and Cochrane Library dataset in accordance with the PRISMA guideline. We included studies that report on avascular maxillary necrosis after any maxillary osteotomy used in the frame of orthognathic surgery. Results: Sixteen studies reporting a total of 65 patients with postoperative avascular maxillary necrosis were included. Those reported avascular necrosis in 32 female patients and 19 male patients. Multisegmented Le Fort I osteotomy was the most common type of related operation amongst the patients followed by single segment Le Fort I osteotomy. Conclusions: Although avascular maxillary necrosis is a very rare complication after maxillary orthognathic surgery it can be complicated with partial / complete loss of the maxilla. A personalized selection of the surgical technique should be made for any patient. Caution is warranted in cleft patients and in patients undergoing multisegmented Le Fort I osteotomies, so that the vitality of the maxilla and especially its anterior part is preserved. In the case when avascular necrosis arises, management should be immediate and precise. As for the reconstruction, it needs to be tailored according to the maxillary defect.

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Schvartzman Cohen, Ruth, Tomer Goldberger, Ina Merzlak, Igor Tsesis, Gavriel Chaushu, Gal Avishai e Eyal Rosen. "The Development of Large Radicular Cysts in Endodontically Versus Non-Endodontically Treated Maxillary Teeth". Medicina 57, n. 9 (20 settembre 2021): 991. http://dx.doi.org/10.3390/medicina57090991.

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Background and Objectives: Large radicular cysts of the maxilla present a clinical challenge, as they may cause recurrent infection, severe alveolar bone loss and disruption of the nasal and maxillary sinus floors. The aim of this study was to evaluate the effect of previous root canal treatment on the clinical presentation of large maxillary radicular cysts. Materials and Methods: All cases of radicular cysts treated at the Oral and Maxillofacial Surgery Department of a tertiary public hospital over a period of six years (2012–2018) were evaluated. Histologically confirmed radicular cysts of the maxilla with a maximal dimension of over 15 mm were included. Demographic data of the patients, clinical presentation and radiographic features of the lesions were analyzed. Results: A total of 211 inflammatory cysts were treated in the study period, of these 54 histologically diagnosed radicular cysts in the maxilla were found to have a maximal dimension of over 15 mm. The mean age of patients with large maxillary radicular cysts was 43.3 years, 57.6% of which were male and 42.4% female. The lateral incisor was the most common tooth affected (46.3%). The mean size of the large radicular cysts was 25 mm. Then, 83.8% of the cysts were observed in teeth with previous endodontic treatment. Teeth without endodontic treatment presented clinically with significantly fewer acute symptoms in comparison to teeth with previous endodontic treatment. Conclusions: the vast majority (83.8%) of large maxillary radicular cysts were associated with endodontically treated teeth. Previous endodontic treatment was correlated to increased frequency of clinical symptoms.

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Loriato, Lívia, e Carlos Eduardo Ferreira. "Surgically-assisted rapid maxillary expansion (SARME): indications, planning and treatment of severe maxillary deficiency in an adult patient". Dental Press Journal of Orthodontics 25, n. 3 (maggio 2020): 73–84. http://dx.doi.org/10.1590/2177-6709.25.3.073-084.bbo.

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ABSTRACT Introduction: Maxillary deficiency, also called transverse deficiency of the maxilla, may be associated with posterior crossbite, as well as with other functional changes, particularly respiratory. In adult patients, because of bone maturation and the midpalatal suture fusion, rapid maxillary expansion has to be combined with a previous surgical procedure to release the areas of resistance of the maxilla. This procedure is known as surgically-assisted rapid maxillary expansion (SARME). Objective: This study discusses the indications, characteristics and effects of SARME, and presents a clinical case of transverse and sagittal skeletal maxillary discrepancy treated using SARME and orthodontic camouflage.

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Koo Min Chee, C. A., D. J. Brierley, K. D. Hunter, C. Pace e A. J. McKechnie. "Surgical ciliated cyst of the maxilla following maxillary osteotomy: a case report". Oral Surgery 7, n. 1 (22 luglio 2013): 39–41. http://dx.doi.org/10.1111/ors.12041.

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Wu, Wen Zheng, Xing Jun Qin, Yang Zhang e Wan Shan Wang. "Mandibular Virtual Reconstruction Surgery Guided by Mimics". Applied Mechanics and Materials 16-19 (ottobre 2009): 842–46. http://dx.doi.org/10.4028/www.scientific.net/amm.16-19.842.

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Aiming at a clinical case of a 52-year-old male patient, the patient’s mandible will be 3 Dimensional (3D) reconstructed and the surgery will be planed. This patient who suffered from mandibular tumor needed to undergo surgery. This study used a Toshiba 64-row Spiral CT to scan patient’s maxilla and mandible. 368 layers consecutive maxillary and mandibular CT images which scanning slice thickness is 1mm were obtained. The original images which format were DICOM were import to Mimics. After decided the bone threshold value the contour lines of every layers were extracted. Every image was passed the processing steps of edge division, selective editing, filling holes, wiping off redundant data and 3D reconstruction. After these steps the 3D geometric model of maxilla and mandible was obtained. The dimension of mandibular tumor and accurate location of the removal part were determined. These steps provide accurate original data for the manufacture of mandibular Rapid Prototyping (RP) model.

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Ruslin, Muhammad. "Sinus lifting dengan teknik lateral window dan transalveolar osteotomy Lateral window and transalveolar osteotomy sinus lifting technique". Journal of Dentomaxillofacial Science 10, n. 2 (30 giugno 2011): 111. http://dx.doi.org/10.15562/jdmfs.v10i2.266.

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The insertion of dental implants in atrophy maxilla is a complicated issue because no bone support due to expansionof maxillary sinus and atrophy of maxillary ridge alveolar. Surgery by sinus lifting with autogenous bonetransplantation has been proven to be an acceptable treatment to get bone support. The lateral window techniqueand transalveolar osteotomy sinus lifting are the methods to correct the height of inadequate bone in the posteriorarea of maxilla for preparation of implan dental insertion. Technique of transalveolar osteotomy sinus lifting isnoninvasive compared to lateral window sinus lifting technique.

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Sharma, Ashu, e G. R. Rahul. "Zygomatic Implants/Fixture: A Systematic Review". Journal of Oral Implantology 39, n. 2 (1 aprile 2013): 215–24. http://dx.doi.org/10.1563/aaid-joi-d-11-00055.

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Patients with moderate to severe atrophy challenge the surgeon to discover alternative ways to use existing bone or resort to augmenting the patient with autogenous or alloplastic bone materials. Many procedures have been suggested for these atrophied maxillae before implant placement, which include Le Fort I maxillary downfracture, onlay bone grafts and maxillary sinus graft procedures. A zygomatic implant can be an effective device for rehabilitation of the severely resorbed maxilla. If zygomatic implants are used, onlay bone grafting or sinus augmentation would likely not be necessary. The purpose of this article is to review the developments that have taken place in zygomatic implant treatment over years, including anatomic information for installing the zygomatic implants, implant placement techniques, stabilization, and prosthodontic procedures.

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Chakravarti, A., S. K. Vishwakarma e V. K. Arora. "Plasmacytoma of the maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 49, n. 1 (gennaio 1997): 44–46. http://dx.doi.org/10.1007/bf02991711.

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Siddiqui, S., S. K. Gupta e B. Baser. "Bilateral Fibromyxoma of Maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 48, n. 1 (gennaio 1996): 61–63. http://dx.doi.org/10.1007/bf03048033.

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Jain, R. K., e O. P. Gupta. "Myxoma of the maxilla". Indian Journal of Otolaryngology 42, n. 2 (giugno 1990): 71–72. http://dx.doi.org/10.1007/bf02993195.

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Hameed, K. N. Shahul, e V. Rajendran. "Liposarcoma of the maxilla". Indian Journal of Otolaryngology 43, n. 4 (dicembre 1991): 197–98. http://dx.doi.org/10.1007/bf02994578.

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Prasad, S., e D. K. Isser. "Osteomyelitis of the maxilla". Indian Journal of Otolaryngology 42, n. 1 (marzo 1990): 41–42. http://dx.doi.org/10.1007/bf02992539.

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Singh, Sunder, e Ajit Singh. "Primary tuberculosis of maxilla". Indian Journal of Otolaryngology and Head and Neck Surgery 49, n. 1 (gennaio 1997): 25–26. http://dx.doi.org/10.1007/bf02991706.

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Bremer, J. William, e Thomas V. McCaffrey. "Fibromyxoma of the Maxilla". Otolaryngology–Head and Neck Surgery 95, n. 1 (luglio 1986): 112–17. http://dx.doi.org/10.1177/019459988609500122.

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