Positional changes of the mandibular condyle in unilateral sagittal split ramus osteotomy combined with intraoral vertical ramus osteotomy for asymmetric class III malocclusion

Jun Park; Ki-Eun Hong; Ji-Eon Yun; Eun-Sup Shin; Chul-Hoon Kim; Bok-Joo Kim; 김정한

doi:10.5125/jkaoms.2021.47.5.373

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자료유형: 학술저널

저자정보: Jun Park (Dong-A University Busan Korea) Ki-Eun Hong (Dong-A University Busan Korea) Ji-Eon Yun (Dong-A University Busan Korea) Eun-Sup Shin (Dong-A University Busan Korea) Chul-Hoon Kim (Dong-A University Busan Korea) Bok-Joo Kim (Dong-A University Busan Korea) 김정한 (동아대학교)

저널정보: 대한구강악안면외과학회 대한구강악안면외과학회지 대한구강악안면외과학회지 제47권 제5호

발행연도: 2021.10

수록면: 373 - 381 (9page)

DOI: 10.5125/jkaoms.2021.47.5.373

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Objectives: In the present study, the effects of sagittal split ramus osteotomy (SSRO) combined with intraoral vertical ramus osteotomy (IVRO) for the treatment of asymmetric mandible in class Ⅲ malocclusion patients were assessed and the postoperative stability of the mandibular condyle and the symptoms of temporomandibular joint disorder (TMD) evaluated. Materials and Methods: A total of 82 patients who underwent orthognathic surgery for the treatment of facial asymmetry or mandibular asymme-try at the Department of Oral and Maxillofacial Surgery, Dong-A University Hospital, from 2016 to 2021 were selected. The patients that underwent SSRO with IVRO were assigned to Group I (n=8) and patients that received bilateral SSRO (BSSRO) to Group II (n=10, simple random sampling). Preoperative and postoperative three-dimensional computed tomography (CT) axial images obtained for each group were superimposed. The condylar position changes and degree of rotation on the superimposed images were measured, and the changes in condyle based on the amount of chin move-ment for each surgical method were statistically analyzed. Results: Group I showed a greater amount of postoperative chin movement. For the amount of mediolateral condylar displacement on the deviated side, Groups I and II showed an average lateral displacement of 0.07 mm and 1.62 mm, respectively, and statistically significantly correlated with the amount of chin movement (P=0.004). Most of the TMD symptoms in Group I patients who underwent SSRO with IVRO showed improvement. Conclusion: When a large amount of mandibular rotation is required to match the menton to the midline of the face, IVRO on the deviated side is considered a technique to prevent condylar torque. In the present study, worsening of TMD symptoms did not occur after orthognathic surgery in any of the 18 patients.

#Orthognathic surgery #Facial asymmetry #Sagittal split ramus osteotomy #Intraoral vertical ramus osteotomy #Temporomandibular joint disorder

참고문헌 (22)

참고문헌 신청

Edward Ellis / 2007 / A Method to Passively Align the Sagittal Ramus Osteotomy Segments / Journal of Oral and Maxillofacial Surgery 65(10):2125~2130

G.E. Ghali / 2000 / Intraoral vertical ramus osteotomy as the preferred treatment for mandibular prognathism / Journal of Oral and Maxillofacial Surgery 58(3):313~315

Richard Trauner / 1957 / The surgical correction of mandibular prognathism and retrognathia with consideration of genioplasty / Oral Surgery, Oral Medicine, Oral Pathology 10(9):899~909

Spiessl B. / 1974 / Osteosynthesis in sagittal osteotomy using the Obwegeser-Dal Pont method / Fortschr Kiefer Gesichtschir 18:145~148

Ingeborg M. Watzke / 2002 / The impact of bilateral sagittal split osteotomy on mandibular width and morphology / Journal of Oral and Maxillofacial Surgery 60(5):502~504

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