Evidence map›Paper›PMID 38780816›Full record

ArticleClinical oral investigations2024

Site and severity of facial asymmetry after bimaxillary surgery for class III deformity: a case-control study.

Tzu-Hsin Wang, Yun-Fang Chen, Ying-An Chen, Chuan-Fong Yao, Tong Xi, Yu-Fang Liao, Yu-Ray Chen

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Article in Clinical oral investigations, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2 citing papers in PubMed.

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7 authors.

Tzu-Hsin WangGraduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan.
Yun-Fang ChenCraniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
Ying-An ChenCraniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
Chuan-Fong YaoCraniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
Tong XiDepartment of Oral and Maxillofacial Surgery, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.
Yu-Fang LiaoGraduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan. yufang@cgmh.org.tw.
Yu-Ray ChenGraduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe study aimed (1) to evaluate the site and severity of facial asymmetry in Class III patients before and after bimaxillary surgery, and (2) to identify the influence of initial severity and positional jaw asymmetry on residual facial asymmetry. MATERIALS AND

methodsPreoperative and postoperative cone-beam computed tomography of 65 patients with Class III facial asymmetry who underwent bimaxillary surgery were evaluated. Five midline and 14 paramedian facial soft tissue landmarks were identified to assess facial asymmetry. The outcomes were compared to a control group consisting of 30 age- and gender-matched Class I subjects. The postoperative positional jaw asymmetry (i.e., shift, roll, yaw) of each osteotomy segment (maxilla, mandible, chin, ramus) was also measured.

resultsBefore surgery, the asymmetry was more severe at the chin, middle and lower contour. Bimaxillary surgery effectively corrected facial asymmetry, particularly in achieving normalization of chin deviation. However, significant asymmetry persisted postoperatively in the middle and lower contour (p < 0.001 and p < 0.01, respectively), which was affected by the positional ramus asymmetry in the roll and shift.

conclusionsDeviation of the chin, middle and lower contour contributed significantly to overall facial asymmetry in Class III asymmetry. Despite normalization of the chin deviation after bimaxillary surgery, asymmetry persisted at the middle and lower contour, primarily as the result of insufficient correction of the positional ramus asymmetry. CLINICAL RELEVANCE: Understanding the residual asymmetry after bimaxillary surgery is important for minimizing deviation and optimizing the surgical planning for its correction.

Indexed as

Cone-Beam Computed TomographyFacial AsymmetryMalocclusion, Angle Class IIIOrthognathic Surgical ProceduresAdolescentAdultAnatomic LandmarksCase-Control StudiesFemaleHumansMaleOsteotomy, Le FortSeverity of Illness IndexTreatment OutcomeCBCTClass III malocclusionFacial asymmetryOrthognathic surgeryOutcomeThree-dimensional

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.