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Ben Salem M, Perrin JP, Loin J, Corre P, Boeffard C, Ghedira H, Bertin H. Dental anomalies in craniofacial microsomia and condylo-mandibular dysplasia: A retrospective study of 103 patients. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2024; 125:101903. [PMID: 38710448 DOI: 10.1016/j.jormas.2024.101903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 03/15/2024] [Accepted: 04/27/2024] [Indexed: 05/08/2024]
Abstract
INTRODUCTION Craniofacial microsomia (CFM) and camel-hump condylo-mandibular dysplasia (CMD) are developmental disorders affecting the mandible that share common clinical features. This study aimed to investigate and compare the dental anomalies (DA) between the two entities for differential diagnosis and to propose appropriate treatment. METHODS This retrospective cross-sectional study was based on panoramic radiographs of patients diagnosed with CFM or CMD. DA were evaluated using the classification reported by Bilge. Delayed tooth eruption on the affected side was noted based on a comparison with the contralateral side. Nolla's stages of tooth calcification were used to assess dental development. RESULTS A total of 103 patients were included, 80 subjects (77.7 %) in CFM group and 23 patients (22.3 %) in CMD group. The prevalence of DA among CFM and CMD-affected patients were 80.0 % and 95.7 %, respectively. Tooth ectopia, tooth impaction, dental development delay, and delayed tooth eruption on the affected side exhibited a significant association with the two craniofacial malformations. The overall affected teeth (molars, premolars, canines) differed between the two craniofacial malformations. Dental abnormalities such as oligodontia, hyperdontia, dentin dysplasia, and anomalies of shape were seen only in subjects affected by CFM. CONCLUSION DA were widely observed in patients with CFM and CMD. The global distribution of affected teeth differed between the two conditions and some DA were detected only in CFM patients. When clinical diagnosis remains uncertain, some specific radiological characteristics of DA can be used to differentiate CFM from CMD.
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Affiliation(s)
- Mouna Ben Salem
- Pediatric and Preventive Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia; Laboratory of Biological, Clinical and Dento-Facial Approach, University of Monastir, Monastir, Tunisia
| | - Jean-Philippe Perrin
- Stomatology and Maxillo-facial Surgery Unit, Nantes University Hospital, F-44000 Nantes, France.
| | - Justine Loin
- Stomatology and Maxillo-facial Surgery Unit, Nantes University Hospital, F-44000 Nantes, France.
| | - Pierre Corre
- Stomatology and Maxillo-facial Surgery Unit, Nantes University Hospital, F-44000 Nantes, France; Nantes University, Oniris, Angers University, Nantes University Hospital, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France.
| | - Camille Boeffard
- Nantes University, Oniris, Angers University, Nantes University Hospital, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, F-44000 Nantes, France; Nantes University, Nantes Hospital, Department of Restorative Dentistry and Endodontics, F-44000 Nantes, France.
| | - Hichem Ghedira
- Pediatric and Preventive Dentistry Department, Faculty of Dental Medicine of Monastir, Monastir, Tunisia; Laboratory of Biological, Clinical, and Dento-Facial Approach, University of Monastir, Monastir, Tunisia.
| | - Hélios Bertin
- Stomatology and Maxillo-facial Surgery Unit, Nantes University Hospital, F-44000 Nantes, France; Nantes University, Angers University, Nantes University Hospital, INSERM, CNRS, CRCI2NA, F-44000 Nantes, France.
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Li X, Xia S, Li Z, Zhang Z. Evaluation of post-activation mandibular remodelling in children with craniofacial microsomia treated with distraction osteogenesis. Orthod Craniofac Res 2024. [PMID: 38899587 DOI: 10.1111/ocr.12827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/12/2024] [Indexed: 06/21/2024]
Abstract
OBJECTIVE Patients with type IIA craniofacial microsomia (CFM) may benefit from mandibular distraction osteogenesis (MDO) treatment during childhood; however, remodelling of the mandible during the consolidation phase, which may affect the short-term outcomes of MDO, has not yet been quantitatively analysed using computed tomography. Therefore, we aimed to investigate bone remodelling of the mandible in children with type IIA CFM treated with MDO before distractor removal and the factors that influence ramus vertical elongation efficiency. MATERIALS AND METHODS Twenty-three children with unilateral CFM were studied between 2020 and 2024. Longitudinal computed tomography data (preoperative, end of active phase and at pre-distractor removal) were analysed. Condyle positions and the mandibular cant were analysed using a paired-sample t test. The relapse rates of vertical lengthening and mandibular cant were calculated. The correlation between distraction efficiency and preoperative craniofacial morphology was analysed. RESULTS The condyle on the affected side moved upwards and backwards by 28.84 ± 4.08 and 2.85 ± 4.33 mm, respectively during the active phase but lost 7.66 ± 2.64 mm of vertical extension during the consolidation phase. The relapse rates for vertical extension of the condyle and occlusal plane were 27% and 35%, respectively. The ratio of mandibular ramus height was positively related to EV. CONCLUSIONS In children with CFM, attention should be paid to vertical elongation instability and relapse of mandibular inclination during consolidation. Severe mandibular ramus hypoplasia is a preoperative risk factor for vertical skeletal relapse during consolidation. Further efforts are required to reduce the stress that leads to relapse.
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Affiliation(s)
- Xiyuan Li
- Department of Maxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Songxia Xia
- Department of Maxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhifeng Li
- Department of Maxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhiyong Zhang
- Department of Maxillofacial Surgery, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
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Bencherqui S, Barone S, Cevidanes L, Perrin JP, Corre P, Bertin H. 3D analysis of condylar and mandibular remodeling one year after intra-oral ramus vertical lengthening osteotomy. Clin Oral Investig 2024; 28:114. [PMID: 38267793 PMCID: PMC10904022 DOI: 10.1007/s00784-024-05504-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/08/2024] [Indexed: 01/26/2024]
Abstract
OBJECTIVES Among the existing techniques for the correction of mandibular posterior vertical insufficiency (PVI), the intra-oral ramus vertical lengthening osteotomy (IORVLO) can be proposed as it allows simultaneous correction of mandibular height and retrusion. This study assessed the 3D morpho-anatomical changes of the ramus-condyle unit and occlusal stability after IORVLO. MATERIALS AND METHODS This retrospective analysis compared immediate and 1-year post-operative 3D CBCT reconstructions. The analysis focused on the condylar height (primary endpoint) and on the changes in condylar (condylar diameter, condylar axis angle) and mandibular (ramus height, Frankfort-mandibular plane angle, gonion position, intergonial distance, angular remodeling) parameters. Additionally, this analysis investigated the maxillary markers and occlusal stability. RESULTS On the 38 condyles studied in 21 included patients (mean age 23.7 ± 3.9 years), a condylar height (CH) loss of 0.66 mm (p < 0,03) was observed, with no correlation with the degree of ramus lengthening (mean 13.3 ± 0.76 mm). Only one patient presented an occlusal relapse of Class II, but a 3.4 mm (28%) condylar diameter loss and a 33% condylar volume reduction with loss of 1 mm and 3.4 mm in CH and condyle diameter, respectively. A mean 3.56 mm (p < 0.001) decrease in ramus height was noted, mainly due to bone resorption in the mandibular angles. CONCLUSION This study confirms the overall stability obtained with IORVLO for the correction of PVI. CLINICAL RELEVANCE This study aims to precise indication of IORVLO, and to validate the clinical and anatomical stability of results.
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Affiliation(s)
- Samy Bencherqui
- Nantes Université, CHU Nantes, Service de Chirurgie Maxillo-Faciale Et Stomatologie, 44000, Nantes, France.
| | - Selene Barone
- School of Dentistry, Department of Health Sciences, Magna, Graecia University of Catanzaro, Viale Europa, 88100, Catanzaro, Italy
| | - Lucia Cevidanes
- Department of Orthodontics & Ped Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Jean-Philippe Perrin
- Nantes Université, CHU Nantes, Service de Chirurgie Maxillo-Faciale Et Stomatologie, 44000, Nantes, France
| | - Pierre Corre
- Nantes Université, CHU Nantes, Service de Chirurgie Maxillo-Faciale Et Stomatologie, 44000, Nantes, France
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, 44000, Nantes, France
| | - Hélios Bertin
- Nantes Université, CHU Nantes, Service de Chirurgie Maxillo-Faciale Et Stomatologie, 44000, Nantes, France
- Nantes Université, Oniris, Univ Angers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, 44000, Nantes, France
- Nantes Université, Univ Angers, CHU Nantes, INSERM, CNRS, CRCI2NA, 44000, Nantes, France
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Goguet Q, Mercier J, Longis J, Bonnet R, Perrin JP, Corre P, Bertin H. Long-term vertical stability of horseshoe osteotomy for the correction of large vertical excess of the maxilla, a retrospective assessment in 15 patients. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2023; 124:101474. [PMID: 37072077 DOI: 10.1016/j.jormas.2023.101474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/12/2023] [Accepted: 04/15/2023] [Indexed: 04/20/2023]
Abstract
INTRODUCTION Vertical stability after a Le Fort I (LF1) osteotomy with substantial upward movement can be compromised by the position and the volume of the inferior turbinate. A horseshoe (HS) osteotomy represents then an alternative as it preserves the hard palate and the intranasal volume. The aim of this study was to assess the vertical stability of the maxilla after HS osteotomy. MATERIALS AND METHODS Patients who underwent a HS osteotomy for the correction of long-face syndrome were retrospectively analyzed. The vertical stability was assessed on lateral cephalograms performed preoperatively (T0), immediately postoperatively (T1), and at the last follow-up (T2) by studying points C (the distal cusp of the first maxillary molar), point P (the prosthion, the lowest edge of the maxillary alveolus of the central incisor), and point I (the upper central incisor edge) in a coordinate system. Postoperative complications and aesthetics of the smile were also investigated. RESULTS Fifteen patients were included (7 females, 8 males, mean age 25.5 ± 9.8 yeras). The mean impaction ranged from 5 mm on point P to 6.1 mm on point C, with a maximal movement of 9.5 mm. A non-significant relapse of 0.8 ± 1.7, 0.6 ± 0.8, and 0.5 ± 1.8 mm was observed after a mean 20.7 months on point C, P, and I respectively. Smile parameters were significantly improved by the procedure, mainly regarding the correction of the gum smile. CONCLUSION HS osteotomy represents a good alternative to total LF1 osteotomy for substantial maxillary upward movement in long face syndrome deformities.
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Affiliation(s)
- Quentin Goguet
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France
| | - Jacques Mercier
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France
| | - Julie Longis
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France
| | - Raphael Bonnet
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France
| | - Jean Philippe Perrin
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France
| | - Pierre Corre
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France; Oniris, UnivAngers, CHU Nantes, INSERM, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Nantes Université, Nantes F-44000, France
| | - Hélios Bertin
- CHU Nantes, Service de Chirurgie Maxillo-Faciale et Stomatologie, Nantes Université, Nantes F-44000, France; UnivAngers, CHU Nantes, INSERM, CNRS, CRCI2NA, Nantes Université, Nantes F-44000, France.
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Lin T, Chen S, Xia L, Jie B, Zhang Y, He Y. Reconstruction of the temporomandibular joint using a vascularized medial femoral condyle osteocartilaginous flap: an experimental investigation in miniature pigs. BMC Oral Health 2023; 23:621. [PMID: 37658390 PMCID: PMC10474687 DOI: 10.1186/s12903-023-03341-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/22/2023] [Indexed: 09/03/2023] Open
Abstract
BACKGROUND Reconstruction of the temporomandibular joint (TMJ) is a significant challenge in maxillofacial surgery. A vascularized medial femoral condyle (MFC) osteocartilaginous flap is a good choice for TMJ reconstruction. In this study, we evaluated the radiographic and histological changes of MFC after TMJ reconstruction. METHODS A ramus-condyle unit (RCU) defect was created unilaterally in five adult male Bama miniature pigs. The ipsilateral vascularized MFC osteocartilaginous flap was used to reconstruct the TMJ, and the non-operative sides served as controls. Multislice spiral computed tomography (CT) was performed preoperatively, immediately postoperatively, and at two weeks, three months, and six months postoperatively. Three animals were euthanized at 6 months postoperatively. Their reconstructed condyles, natural condyles and the MFCs on the opposite side were collected and subjected to µCT and histological evaluation. RESULTS In the miniature pigs, the vascularized MFC osteocartilaginous flap was fused to the mandible, thus restoring the structure and function of the RCU. The postoperative radiographic changes and histological results showed that the reconstructed condyle was remodeled toward the natural condyle, forming a similar structure, which was significantly different from the MFC. CONCLUSIONS In miniature pigs, the RCU can be successfully reconstructed by vascularized osteocartilaginous MFC flap. The reconstructed condyle had almost the same appearance and histological characteristics as the natural condyle.
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Affiliation(s)
- Tianyi Lin
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China
- National Center for Stomatology, Beijing, PR China
- National Clinical Research Center for Oral Diseases, Beijing, PR China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Shuo Chen
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China
- National Center for Stomatology, Beijing, PR China
- National Clinical Research Center for Oral Diseases, Beijing, PR China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Long Xia
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China
- National Center for Stomatology, Beijing, PR China
- National Clinical Research Center for Oral Diseases, Beijing, PR China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Bimeng Jie
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China
- National Center for Stomatology, Beijing, PR China
- National Clinical Research Center for Oral Diseases, Beijing, PR China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Yi Zhang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China
- National Center for Stomatology, Beijing, PR China
- National Clinical Research Center for Oral Diseases, Beijing, PR China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Yang He
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, No.22 Zhongguancun South Avenue, Haidian District, Beijing, 100081, PR China.
- National Center for Stomatology, Beijing, PR China.
- National Clinical Research Center for Oral Diseases, Beijing, PR China.
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, PR China.
- Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.
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Nelke K, Łuczak K, Janeczek M, Pasicka E, Morawska-Kochman M, Guziński M, Dobrzyński M. Methods of Definitive Correction of Mandibular Deformity in Hemimandibular Hyperplasia Based on Radiological, Anatomical, and Topographical Measurements-Proposition of Author's Own Protocol. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:10005. [PMID: 36011638 PMCID: PMC9408266 DOI: 10.3390/ijerph191610005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
In order to fully evaluate and establish the degree of bone overgrowth, various radiological studies are essential in the careful planning of the amount of surgical excision. In the presented paper, the authors use self-designed anatomo-topographical reference points for planning the surgeries. Routine panoramic radiographs and low-dose computed tomography based on anatomical landmarks help in measuring the proportions of mandibular bone overgrowth with the following preoperative anatomical landmarks: (Go-Go), (Go(Right)-Gn), (Go(Left)-Gn), and (Me−Gn). Measurements taken at selected points and landmarks (gonion-gnathion/gnathion-menton) are easy to conduct. In the authors’ proposal, the main key factor is total chin correction, which is necessary in cases of severe overgrowth; when F0 > C and Go-Gn>, there is >7 mm of vertical bone overgrowth, and the mandibular canal is positioned <5 mm from the inferior mandibular border—MIB. Larger overgrowths (>7 mm) have a greater outcome on the final symmetry than smaller overgrowths. As no guidelines are known, the authors present their own proposal.
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Affiliation(s)
- Kamil Nelke
- Practice of Maxillo-Facial Surgery and Maxillo-Facial Surgery Ward, EMC Hospital, Pilczycka 144, 54-144 Wrocław, Poland
| | - Klaudiusz Łuczak
- Practice of Maxillo-Facial Surgery and Maxillo-Facial Surgery Ward, EMC Hospital, Pilczycka 144, 54-144 Wrocław, Poland
| | - Maciej Janeczek
- Department of Biostructure and Animal Physiology, Wrocław University of Environmental and Life Sciences, Kożuchowska 1, 51-631 Wrocław, Poland
| | - Edyta Pasicka
- Department of Biostructure and Animal Physiology, Wrocław University of Environmental and Life Sciences, Kożuchowska 1, 51-631 Wrocław, Poland
| | - Monika Morawska-Kochman
- Department of Head and Neck Surgery, Otolaryngology, Wrocław Medical University, Borowska 213, 50-556 Wrocław, Poland
| | - Maciej Guziński
- Department of Radiology, Wrocław Medical University, Borowska 213, 50-556 Wrocław, Poland
| | - Maciej Dobrzyński
- Department of Pediatric Dentistry and Preclinical Dentistry, Wrocław Medical University, Krakowska 26, 50-425 Wrocław, Poland
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Outcomes of functional treatment of condylar mandibular fractures with an articular impact: a retrospective study of 108 children. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2021; 123:177-183. [PMID: 34224922 DOI: 10.1016/j.jormas.2021.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/29/2021] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The treatment of fractures of the mandibular condylar process remains controversial, especially in children. The aim of this study was to assess the long-term clinical and radiographic outcomes of functional treatments for mandibular condylar fractures with an articular impact. MATERIALS AND METHODS Young patients (< 15 years of age) presenting with either a unilateral or a bilateral mandibular fracture of the condylar process were included in this retrospective study. The clinical analysis focused on investigation of joint amplitudes at 1, 2, 6, 12, and 24 months after the beginning of the treatment, and at the end of their physical growth for the long-term study. Other clinical parameters included temporomandibular joint (TMJ) disorders and facial asymmetry. Photographs of patients and panoramic X-rays were assessed to identify any growth disorders at the end of the follow-up. RESULTS One hundred and eight patients were included in this study, and 33 patients who were no longer undergoing mandibular growth at the time of the last follow-up were included in the long-term study. The mean age at the time of the trauma was 9.33 years, and the mean follow-up was 82.2 months. A significant improvement was observed in the maximal mouth opening (MMO), diduction, and propulsion in the first months after the trauma, reaching 44.31 mm (p < 0.0001), 10.50 mm (p = 0.0001), and 6.33 mm (p = 0.01), respectively, at 6 months. Three patients experienced a clinical posterior vertical insufficiency, one of which required a surgical procedure, while four patients exhibited a ramus asymmetry of up to 10 mm, albeit with no clinical consequences. One case of TMJ ankylosis was noted. CONCLUSION Our study suggests that functional treatment is appropriate for fractures of the mandibular condyle with an articular impact in children, as it promotes mandibular growth and good functional recovery. Children have to be followed up, however, until completion of growth.
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Using orthodontic elastic traction during the active period of distraction osteogenesis to increase the effective vertical extension of hemifacial microsomia patients: A multi-center randomized clinical trial. J Craniomaxillofac Surg 2021; 49:1054-1063. [PMID: 34404588 DOI: 10.1016/j.jcms.2021.06.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/28/2021] [Accepted: 06/20/2021] [Indexed: 11/22/2022] Open
Abstract
In this study, the aim was to assess whether using elastic traction during the active period of distraction osteogenesis could effectively increase the vertical extension. Patients with Pruzansky-Kaban Type II mandibular deformity were recruited and randomly assigned into Elastic traction + Distraction Osteogenesis group or Distraction Osteogenesis group, respectively. During the active period, the experimental group received orthodontic elastic traction 3 days after distraction osteogenesis implantation, while the control group received no treatment. All the participants underwent computed tomography (CT) examination before surgery, at the end of the active period, 6 months and 2 years after distraction osteogenesis tractor implantation. The primary outcome was the effective vertical extension rate of the mandible from the baseline to the end of the active period after operations, and there were 7 secondary outcomes used. 70 patients were included. The effective vertical extension rates were 85.021% ± 7.432% (mean ± SD) and 68.811% ± 9.510% (mean ± SD) in the experimental and control groups, respectively (P = 0.001). The average distances between the lower middle incisor point to the sagittal plane at the end of the active period were 2.485 ± 1.411 mm and 3.938 ± 2.293 mm in the experimental and control groups, respectively (P = 0.026). At the end of the active period of distraction osteogenesis, the average values of the mandibular occlusal plane canting were -4.887 ± 3.126 mm and -0.177 ± 4.029 mm in the experimental and control groups, respectively (P = 0.026). Elastic traction-assisted distraction osteogenesis could improve traction efficiency and facial symmetry.
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Bertin H, Merlet FL, Khonsari RH, Delaire J, Corre P, Mercier J. Dental and maxillofacial features of condylo-mandibular dysplasia: A case series of 21 patients. J Craniomaxillofac Surg 2020; 48:956-961. [DOI: 10.1016/j.jcms.2020.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 05/11/2020] [Accepted: 07/19/2020] [Indexed: 10/23/2022] Open
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