Evidence map›Paper›PMID 34338893›Full record

ArticleClinical oral investigations2022

Type of mandibular asymmetry affects changes and outcomes of bimaxillary surgery for class III asymmetry.

Li-Chen Liu, Ying-An Chen, Ruei-Feng Chen, Chuan-Fong Yao, Yu-Fang Liao, Yu-Ray Chen

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Article in Clinical oral investigations, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Li-Chen LiuDepartment of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, Taiwan.ORCID http://orcid.org/0000-0001-5840-1841
Ying-An ChenCraniofacial Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
Ruei-Feng ChenVendome Aesthetics Medical Center, Taipei, Taiwan.
Chuan-Fong YaoCraniofacial Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
Yu-Fang LiaoCollege of Medicine, Chang Gung University, Taoyuan, Taiwan. yufang@cgmh.org.tw.
Yu-Ray ChenCollege of Medicine, Chang Gung University, Taoyuan, Taiwan.

Funding

Chang Gung Memorial Hospital CMRPG5K0051-52Ministry of Science and Technology, Taiwan MOST 108-2314-B-182-010
6 · The paper itself

Abstract

objectivesVarious methods have been used to classify class III asymmetry. There is little information on the use of an asymmetry index to examine soft tissue changes and outcomes for patients with class III asymmetry. This study aimed to (1) evaluate soft tissue changes and outcomes for three types of mandibular asymmetry and (2) determine if measures are associated with type of asymmetry. MATERIALS AND

methodsAdults who consecutively underwent bimaxillary surgery using surgery-first approach for correction of class III asymmetry were divided into three groups based on type of mandibular asymmetry. This previously reported classification system is simple and mutually independent, categorizing mandibular asymmetry according to the amount and direction of ramus asymmetry relative to menton deviation: patients with a larger transverse ramus distance on the menton deviation side were divided into group 1 and group 2; group 1 (n = 45) exhibited a menton deviation larger than ramus discrepancy; group 2 (n = 11) exhibited a menton deviation less than ramus discrepancy; group 3 (n = 22) had larger transverse ramus distance contralateral to the side of the menton deviation. Soft tissue facial asymmetry indices, calculated from cone beam computed tomography images, assessed midline and contour asymmetry presurgery, changes postsurgery, and outcomes.

resultsCompared with groups 1 and 2, the presurgery index for contour and midline asymmetry was smallest for group 3. All the three groups had significant improvement in midline asymmetry postsurgery, and outcome measures were good; there were no differences between groups. However, contour asymmetry only improved significantly for groups 1 and 2. The outcome for contour asymmetry was fair for groups 1 and 3 and poor for group 2.

conclusionsBimaxillary surgery significantly improved facial midline asymmetry. The type of mandibular asymmetry was associated with postsurgical changes and outcomes for contour asymmetry. CLINICAL RELEVANCE: Understanding the types of mandibular asymmetry could help clinicians to develop treatment plans and predict treatment changes and outcomes.

Indexed as

Malocclusion, Angle Class IIIAdultCephalometryCone-Beam Computed TomographyFacial AsymmetryHumansImaging, Three-DimensionalMandibleClass III malocclusionContour asymmetryMandibular asymmetryMidline asymmetryOrthognathic surgery

Identifiers

PMID34338893

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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.