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Hattori Y, Chien-Jung Pai B, Saito T, Denadai R, Chou PY, Lo LJ. Appraising mandibular prognathism in class III malocclusion following orthognathic surgery: Patient-reported and cephalometry-based outcomes. J Craniomaxillofac Surg 2024:S1010-5182(24)00160-4. [PMID: 39034196 DOI: 10.1016/j.jcms.2024.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 01/29/2024] [Accepted: 04/27/2024] [Indexed: 07/23/2024] Open
Abstract
Patients with class III malocclusion often exhibit mandibular prognathism and complain of "prognathic appearance". The overall positive effects of orthognathic surgery on facial appearance have been demonstrated using patient-reported outcome measures (PROMs), but studies investigating the correlation between subjective PROMs results and objective measurements of imaging studies are sparse in the literature. This study recruited consecutive patients with skeletal class III malocclusion who underwent two-jaw orthognathic surgery between January 2016 and January 2021. The PROMs survey was conducted focusing on subjective perception of mandibular appearance. Lateral cephalometric images were measured to examine the correlation with the PROMs results. A total of 96 patients were eligible for this study. Of these, 74 patients (77.1%) reported complete correction of prognathic appearance postoperatively, whereas 22 patients (22.9%) perceived residual prognathic appearance. In a comparison of postoperative measurements between completely and incompletely satisfied patients, there were significant differences in SNB, ANB, convexity, facial angle, Nv-B, Nv-Pog, SN'B', soft tissue facial angle, lip-chin-throat angle, N'v-B', and N'v-Pog'. The PROM results were significantly associated with the objective measurements of imaging studies. Investigating the correlation between PROMs and objective measurements enables integration of patients' perception of the outcomes into future therapeutic strategy and surgical planning, contributing to the enhancement of patient satisfaction.
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Affiliation(s)
- Yoshitsugu Hattori
- Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Betty Chien-Jung Pai
- Department of Craniofacial Orthodontics and Craniofacial Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Takafumi Saito
- Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Rafael Denadai
- Plastic and Cleft-Craniofacial Surgery, A&D DermePlastique, Sao Paulo, Brazil
| | - Pang-Yun Chou
- Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Lun-Jou Lo
- Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
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Chen PR, Kwon SH, Lo LJ, Chou PY. Three-Dimensional Comparative Changes in the Pharyngeal Airway of Patients with Cleft after Two-Jaw Orthognathic Surgery. Plast Reconstr Surg 2024; 153:971e-983e. [PMID: 37257149 DOI: 10.1097/prs.0000000000010782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND The present study evaluated the three-dimensional changes of the pharyngeal airway after orthognathic surgery (OGS) in patients with unilateral and bilateral clefts, and in unilateral cleft patients with and without pharyngeal flap (PF). METHODS Forty-five patients with unilateral or bilateral clefts undergoing OGS were enrolled. Cone-beam computed tomographic images were obtained before and after OGS. We measured the pharyngeal airway volumes, minimal cross-sectional area, and the horizontal displacement of facial landmarks. RESULTS The patients with bilateral cleft exhibited smaller initial velopharyngeal volume (unilateral, 8623 mm 3 ; bilateral, 7781 mm 3 ; P = 0.211), whereas the velopharyngeal volume increased significantly with a median of 744 mm 3 after OGS ( P = 0.031). The median horizontal displacement of A point was 2.9 and 2.6 mm among the patients with unilateral and bilateral clefts, respectively ( P = 0.276), and the median horizontal displacement of B point was -2.9 and -3.3 mm among patients with unilateral and bilateral clefts, respectively ( P = 0.618). The unilateral cleft patients with PF exhibited lower initial velopharyngeal volume (patients with a history of PF surgery, 7582 mm 3 ; patients without a history of PF surgery, 8756 mm 3 ; P = 0.129) and a lower increase in velopharyngeal volume (patients with a history of PF surgery, 437 mm 3 ; patients without a history of PF surgery, 627 mm 3 ; P = 0.739) after OGS. CONCLUSIONS Midface hypoplasia and the decrease in the velopharyngeal volume were more prominent among the bilateral cleft patients and the unilateral cleft patients with PF. After OGS, the velopharyngeal volume increased considerably among the bilateral cleft patients, but no considerable differences were noted among the unilateral cleft patients with PF. CLINICAL QUESTION/LEVEL OF EVIDENCE Risk, II.
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Affiliation(s)
- Pin-Ru Chen
- From the Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University
| | - Soo-Ha Kwon
- From the Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University
| | - Lun-Jou Lo
- From the Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University
| | - Pang-Yun Chou
- From the Department of Plastic and Reconstructive Surgery and Craniofacial Research Center, Chang Gung Memorial Hospital, Chang Gung University
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Barone S, Cevidanes L, Miranda F, Gurgel ML, Anchling L, Hutin N, Bianchi J, Goncalves JR, Giudice A. Enhancing skeletal stability and Class III correction through active orthodontist engagement in virtual surgical planning: A voxel-based 3-dimensional analysis. Am J Orthod Dentofacial Orthop 2024; 165:321-331. [PMID: 38010236 PMCID: PMC10923113 DOI: 10.1016/j.ajodo.2023.09.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 11/29/2023]
Abstract
INTRODUCTION Skeletal stability after bimaxillary surgical correction of Class III malocclusion was investigated through a qualitative and quantitative analysis of the maxilla and the distal and proximal mandibular segments using a 3-dimensional voxel-based superimposition among virtual surgical predictions performed by the orthodontist in close communication with the maxillofacial surgeon and 12-18 months postoperative outcomes. METHODS A comprehensive secondary data analysis was conducted on deidentified preoperative (1 month before surgery [T1]) and 12-18 months postoperative (midterm [T2]) cone-beam computed tomography scans, along with virtual surgical planning (VSP) data obtained by Dolphin Imaging software. The sample for the study consisted of 17 patients (mean age, 24.8 ± 3.5 years). Using 3D Slicer software, automated tools based on deep-learning approaches were used for cone-beam computed tomography orientation, registration, bone segmentation, and landmark identification. Colormaps were generated for qualitative analysis, whereas linear and angular differences between the planned (T1-VSP) and observed (T1-T2) outcomes were calculated for quantitative assessments. Statistical analysis was conducted with a significance level of α = 0.05. RESULTS The midterm surgical outcomes revealed a slight but significantly less maxillary advancement compared with the planned position (mean difference, 1.84 ± 1.50 mm; P = 0.004). The repositioning of the mandibular distal segment was stable, with insignificant differences in linear (T1-VSP, 1.01 ± 3.66 mm; T1-T2, 0.32 ± 4.17 mm) and angular (T1-VSP, 1.53° ± 1.60°; T1-T2, 1.54° ± 1.50°) displacements (P >0.05). The proximal segments exhibited lateral displacement within 1.5° for both the mandibular right and left ramus at T1-VSP and T1-T2 (P >0.05). CONCLUSIONS The analysis of fully digital planned and surgically repositioned maxilla and mandible revealed excellent precision. In the midterm surgical outcomes of maxillary advancement, a minor deviation from the planned anterior movement was observed.
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Affiliation(s)
- Selene Barone
- Department of Health Sciences, School of Dentistry, Magna Graecia University of Catanzaro, Catanzaro, Italy.
| | - Lucia Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Mich
| | - Felicia Miranda
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil
| | - Marcela Lima Gurgel
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Mich
| | - Luc Anchling
- Chemistry and Chemical Engineering School - Digital Sciences School Lyon, Lyon, France
| | - Nathan Hutin
- Chemistry and Chemical Engineering School - Digital Sciences School Lyon, Lyon, France
| | - Jonas Bianchi
- Department of Orthodontics, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, Calif
| | - Joao Roberto Goncalves
- Department of Pediatric Dentistry, School of Dentist, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Amerigo Giudice
- Department of Health Sciences, School of Dentistry, Magna Graecia University of Catanzaro, Catanzaro, Italy
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Grillo R, Borba AM, da Silva YS, Brozoski MA, Miloro M, Naclério-Homem MDG. Exploring the relationship between the number of systematic reviews and quality of evidence: an orthognathic surgery-based study. Oral Surg Oral Med Oral Pathol Oral Radiol 2024; 137:101-112. [PMID: 38155010 DOI: 10.1016/j.oooo.2023.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 12/30/2023]
Abstract
OBJECTIVE We analyzed the quality and quantity of systematic reviews (SRs) of orthognathic surgery, the most frequently published topic in maxillofacial surgery. STUDY DESIGN We searched the PubMed database for SRs of orthognathic surgery with no restriction on the language of publication date. We assessed the certainty of evidence presented according to the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocol and the Leiden Manifesto using the Grading of Recommendations Assessment, Development, and Evaluation approach. We analyzed the data using descriptive statistics, Pearson´s correlation test, and linear regression. RESULTS Of the 171 SRs evaluated, approximately one fifth presented evidence with a high level of certainty. The number of orthognathic surgery SRs has been increasing, and many SRs were published after very similar topics had already been published. There is no relationship between the impact factor and the certainty of evidence. CONCLUSIONS An excessive number of SRs of orthognathic surgery are published, and many SRs are superfluous, simply reporting previous findings. Clinicians should not base treatment decisions solely on the evidence presented in SRs, and journal editors and reviewers should evaluate these SRs more critically, particularly when they address topics that have already been covered in the literature.
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Affiliation(s)
- Ricardo Grillo
- Department of Oral and Maxillofacial Surgery, Traumatology and Prosthesis-Faculty of Dentistry of the University of São Paulo, Brazil; Department of Oral and Maxillofacial Surgery, Faculdade Patos de Minas, Brasília, Brazil.
| | - Alexandre Meireles Borba
- Research Program in Integrated Dental Sciences Department, Faculty of Dentistry of the University of Cuiabá, Cuiabá-MT, Brazil
| | | | - Mariana Aparecida Brozoski
- Department of Oral and Maxillofacial Surgery, Traumatology and Prosthesis-Faculty of Dentistry of the University of São Paulo, Brazil
| | - Michael Miloro
- Department of Oral and Maxillofacial Surgery, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Maria da Graça Naclério-Homem
- Department of Oral and Maxillofacial Surgery, Traumatology and Prosthesis-Faculty of Dentistry of the University of São Paulo, Brazil
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Passalboni C, Taverne M, Lopez R, Rotenberg M, Lauwers F, Prevost A. Characterization of labiomandibular movements induced after isolated LeFort I osteotomy in the surgical management of class III malocclusion. PLoS One 2023; 18:e0292391. [PMID: 37812623 PMCID: PMC10561870 DOI: 10.1371/journal.pone.0292391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/19/2023] [Indexed: 10/11/2023] Open
Abstract
INTRODUCTION Maxillary surgery alone can be proposed for the surgical management of class III malocclusion, but anticipating outcomes for the labiomental muscle complex is challenging due to the mandibular autorotation phenomenon. The objective of this study was to quantify the mandibular and labiomental movements induced by maxillary osteotomy alone in the management of class III malocclusion according to different clinical and surgical variables. METHODS The post-operative changes in mandibular and labiomental shapes were studied by geometric morphometry from the pre- and post-operative lateral cephalometric radiograph of 25 patients. The explanatory variables tested were maxillary advancement, maxillary rotation, and divergence. RESULTS Soft tissues repositioning are different from postoperative mandibular repositioning after maxillary osteotomy. Neuromuscular adjustments of mandible depend on divergence and the maxillary rotation. Labiomental response only depends on divergence. CONCLUSION The surgical procedure does not have the same bone-related and musculocutaneous effects on patients with the same class III malocclusion. It is therefore essential for surgeons to understand the effects of their procedure on musculocutaneous tissues in order to best anticipate post-operative outcomes.
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Affiliation(s)
- Chris Passalboni
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Maxime Taverne
- Craniofacial Growth and Form Laboratory, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Raphael Lopez
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Maxime Rotenberg
- Dental Faculty, Department of Orthodontics, Toulouse University Hospital Center, Toulouse, France
| | - Frédéric Lauwers
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
| | - Alice Prevost
- Plastic and Maxillo-facial Surgery Department, Toulouse University Hospital Center, Toulouse, France
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Miura KI, Yoshida M, Rokutanda S, Koga T, Umeda M. Swallowing Functions after Sagittal Split Ramus Osteotomy with Loose Fixation for Mandibular Prognathism: A Retrospective Case Series Research. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:1926. [PMID: 36767291 PMCID: PMC9916000 DOI: 10.3390/ijerph20031926] [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: 12/24/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Sagittal split ramus osteotomy (SSRO) is a standard surgical technique for patients with mandibular prognathism. However, the appropriate position of the proximal fragment is not strictly defined, and rigid fixation can induce early postoperative skeletal relapse and temporomandibular (TMJ) disorders. Loose fixation can be expected to seat the proximal bone fragments in a physiologically appropriate position, thereby reducing adverse events. Although long-term skeletal stability has been achieved using SSRO without fixation, the evaluation of preoperative and postoperative eating and swallowing functions remains unclear, and this study aimed to clarify this point. We evaluated mastication time, oral transfer time, and pharyngeal transfer time using videofluorography (VF) preoperatively, two months postoperatively, and six months postoperatively, and along with the position of anatomical landmarks using cephalometric radiographs, modified water swallowing test (MWST), food test (FT), and repetitive saliva swallowing test (RSST) were used to evaluate postoperative swallowing function. Four patients (one male, three females; mean (range) age 26.5 (18-51) years) were included, with a mean setback of 9.5 mm and 6.5 mm on the right and left sides, respectively. Postoperative eating and swallowing functions were good in VF, cephalometric analysis, MWST, FT, and RSST. In the present study, good results for postoperative eating and swallowing functions were obtained in SSRO with loose fixation of the proximal and distal bone segments.
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Affiliation(s)
- Kei-ichiro Miura
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
- Department of Oral Surgery, Imakiire General Hospital, Kagoshima 890-0051, Japan
| | - Masashi Yoshida
- Department of Oral Surgery, Imakiire General Hospital, Kagoshima 890-0051, Japan
| | - Satoshi Rokutanda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
- Department of Dentistry and Oral Surgery, Juko Memorial Nagasaki Hospital, Nagasaki 852-8004, Japan
| | - Takamitsu Koga
- Department of Oral Surgery, Imakiire General Hospital, Kagoshima 890-0051, Japan
| | - Masahiro Umeda
- Department of Clinical Oral Oncology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8588, Japan
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Sjöström M, Lund B, Sunzel B, Bengtsson M, Magnusson M, Rasmusson L. Starting a Swedish national quality registry for orthognathic surgery: a tool for auditing fundamentals of care. BMC Oral Health 2022; 22:588. [PMID: 36494655 PMCID: PMC9732981 DOI: 10.1186/s12903-022-02568-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 11/05/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND National quality registries (NQRs) provide open data for user-directed acquisition. National Quality Registry (NQR) data are often used to analyze the rates of treatment success and adverse events for studies that aim to improve treatment quality and patient satisfaction. Thus, NQRs promote the goal of achieving evidence-based therapies. However, the scientific literature seldom focuses on the complex process of initiating, designing, and implementing an NQR. Starting an NQR may be particularly challenging in a setting where specialized care is decentralized, such as orthognathic surgery in Sweden. The present study describes the initiation and early phases of a new NQR for orthognathic surgery in Sweden. METHODS The initial inventory phase included gaining knowledge on regulations, creating economic plans, and identifying pitfalls in existing NQRs. Next, a crude framework for the registry was achieved. Outcome measures were selected with a nation-wide questionnaire, followed by a Delphi-like process for selecting parameters to include in the NQR. Our inclusive process comprised a stepwise introduction, feedback-based modifications, and preparatory educational efforts. Descriptive data were collected, based on the first 2 years (2018-2019) of registry operation. RESULTS Two years after implementation, 862 patients that underwent 1320 procedures were registered. This number corresponded to a 91% coverage rate. Bimaxillary treatments predominated, and the most common were a Le Fort I osteotomy combined with a bilateral sagittal split osteotomy (n = 275). Reoperations were conducted in 32 patients (3.6%), and the rate of patient satisfaction was 95%. CONCLUSIONS A National Quality Registry should preferentially be started and maintained by an appointed task force of active clinicians. A collaborative, transparent, inclusive process may be an important factor for achieving credibility and high coverage, particularly in a decentralized setting.
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Affiliation(s)
- Mats Sjöström
- grid.412215.10000 0004 0623 991XOral and Maxillofacial Surgery, Umeå University Hospital, Umeå, Sweden ,grid.12650.300000 0001 1034 3451Department of Odontology, Umeå University, Umeå, Sweden
| | - Bodil Lund
- grid.4714.60000 0004 1937 0626Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden ,grid.24381.3c0000 0000 9241 5705Medical Unit of Plastic Surgery and Oral and Maxillofacial Surgery, Department for Oral and Maxillofacial Surgery and Jaw Orthopedics, Karolinska University Hospital, Stockholm, Sweden
| | - Bo Sunzel
- grid.32995.340000 0000 9961 9487Dep Oral and Maxillofacial surgery Public Dental health Växjö, Malmö University, Malmö, Sweden
| | - Martin Bengtsson
- grid.4514.40000 0001 0930 2361Department of Clinical Sciences, Faculty of Medicine, Lund University, Lund, Sweden ,grid.411843.b0000 0004 0623 9987Department of Oral & Maxillofacial Surgery, Skåne University Hospital, Lund, Sweden
| | - Mikael Magnusson
- Department of Specialist Dentistry, Oral and Maxillofacial Surgery, Colloseum and Smile AB, Stockholm, Sweden
| | - Lars Rasmusson
- grid.8761.80000 0000 9919 9582Department of Oral and Maxillofacial Surgery, The Sahlgrenska Academy and hospital, University of Gothenburg, Gothenburg, Sweden
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Difference in Using Protrusion Face Mask before or after Rapid Palatal Expansion in Skeletal Class III Children: A Preliminary Study. CHILDREN 2022; 9:children9101535. [PMID: 36291471 PMCID: PMC9600127 DOI: 10.3390/children9101535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 09/19/2022] [Accepted: 09/29/2022] [Indexed: 11/17/2022]
Abstract
Treatment of third-class malocclusions often presents a challenge for orthodontists. Skeletal disharmony is often associated with dental malposition. There are several therapeutic choices, including the use in combination of transverse expansion of the maxilla with rapid palatal expander (RPE) and posterior-anterior traction with a Delaire face mask (FM). The purpose of the study is to verify whether there are significant differences in the treatment outcome in the case of use of a face mask followed by a palatal expander or with the sequence of these auxiliaries reversed. Subject and Methods: The two groups were both made up of 13 patients, subdivided into group A, i.e., those whose sequence involved the use of extraoral traction first and then the disjunctor, and those with an inverted sequence in group B. Some cephalometric parameters and dento-skeletal characteristics were evaluated pre-treatment (t0) and at the end of therapy (t1). Results: Considering the T1-T0 of group A (Delaire + rapid palatal expander), the evaluation of the results obtained in this work allows us to observe how within group A there is a significant improvement in the Witts and Nanda indices and facial convexity. Group B (treated with the palate disjunctor sequence followed by traction with Delaire's mask) showed a significant improvement in ANB, in AoBo, and AppBpp values and in convexity. The two groups were comparable, and no statistically significant difference was highlighted. Discussion: The early therapy of the third skeletal classes by means of a rapid palate expander and face mask is effective. There is no statistically significant difference in the two groups who performed the therapy in reverse mode. This suggests that the clinician should choose the treatment sequence based on the skeletal and occlusal conditions of their patients at the start of treatment. Conclusion: Early therapy of third skeletal classes with sagittal expansion using a rapid palate expander can be performed earlier or later than posterior-anterior traction with a Delaire mask.
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Kang S, Kim YH, Baek S, Kim DW, Shin JW, Chae HS. Stability of clockwise rotation of the maxillary occlusal plane by two‐jaw surgery in patients with skeletal class
III
malocclusion. Orthod Craniofac Res 2022; 26:207-215. [PMID: 36054615 DOI: 10.1111/ocr.12601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/14/2022] [Accepted: 08/03/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The objective of the study was to investigate the post-surgical stability of clockwise rotation of the maxillary occlusal plane (MXOP) after Le Fort I osteotomy for posterior impaction and advancement, in skeletal Class III patients who had undergone two-jaw orthognathic surgery (2J-OGS). MATERIALS AND METHODS The sample set consisted of 46 patients (18 males and 28 females). Using lateral cephalograms taken at the initial evaluation (T0), before 2J-OGS (T1), after 2J-OGS (T2) and at debonding (T3), the amount of MXOP change (criterion: 2° in ΔMXOP [between T2 and T3]) was used to assign patients to Group 1 (G1, high relapse, -3.09°) or Group 2 (G2, low relapse, -0.99°). Findings were statistically compared between the groups. RESULTS Compared with G2, G1 exhibited more severe skeletal Class III relationships and a flatter MXOP at T0, a greater increase in ΔANB, and more clockwise rotation of ΔMXOP and ΔFMA between T1 and T2. G1 also showed a greater decrease in ΔANB, higher counterclockwise rotation of ΔMXOP and upward movement of U1 between T2 and T3. Regression analysis yielded the following equation: MXOP (ΔT2-T3) = -0.37 X MXOP (ΔT1-T2) -0.43. CONCLUSIONS The higher the clockwise rotation of the MXOP during 2J-OGS in skeletal Class III patients, the greater the subsequent relapse (counterclockwise rotation) of the MXOP.
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Affiliation(s)
- Soon‐young Kang
- Department of Orthodontics, Institute of Oral Health Science Ajou University School of Medicine Suwon South Korea
| | - Young Ho Kim
- Department of Orthodontics, Institute of Oral Health Science Ajou University School of Medicine Suwon South Korea
| | - Seung‐Hak Baek
- Department of Orthodontics, School of Dentistry, Dental Research Institute Seoul National University Seoul South Korea
| | - Dong Woo Kim
- Department of Orthodontics, Institute of Oral Health Science Ajou University School of Medicine Suwon South Korea
| | - Jeong Won Shin
- Department of Orthodontics, Institute of Oral Health Science Ajou University School of Medicine Suwon South Korea
| | - Hwa Sung Chae
- Department of Orthodontics, Institute of Oral Health Science Ajou University School of Medicine Suwon South Korea
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