Three-dimensional analysis of lip soft tissue changes and related jaw changes in patients with skeletal class III malocclusion and facial asymmetry

Xu, Wenjie; Tan, Hao; Meng, Xuehuan; Ye, Ming; Wang, Tao; Zheng, Leilei

doi:10.3233/xst-210903

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Regarding changes in the coronal plane of the lip, as Ch-D moved toward the MSP, the difference in the distance from the MSP to the Ch-D and Ch-ND significantly decreased post-surgery, which is consistent with the findings of Kwon et al [8]. As a result of these differential movements of Ch-D/ND, the lip width was reduced, which is consistent with the findings reported by Xu et al [27]. Assuming that transverse lip asymmetry is the difference in the distance from the MSP to the Ch-D and Ch-ND in the transverse axis, the difference was significantly reduced after surgery, indicating that the asymmetry had improved (Table 4).…”

Section: Discussionsupporting

confidence: 90%

Three-Dimensional Change of Lip after Two-Jaw Surgery in Facial Asymmetry Using Facial Scanner

Kim

Choi

et al. 2022

Applied Sciences

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A facial scanner and three-dimensional computed tomography (CT) were used to evaluate the three-dimensional change in lip asymmetry before and after two-jaw surgery for 22 patients with facial asymmetry (menton deviation > 3 mm). We used the labrale superius (Ls), deviated/non-deviated-side cheilions (Ch-D/Ch-ND), and labrale inferius (Li) to construct the upper and lower lip planes to evaluate the lip asymmetry. A correlation analysis was performed to determine the factors related to the vertical change in the cheilions (ΔChZ-D/ND). In the transverse axis, Ch-D and Li moved to improve the asymmetry after surgery. All landmarks, except the Ls, moved backward in the anteroposterior axis. In the vertical axis, significant upward movement was observed in all hard tissue landmarks; however, there were no significant changes in the soft tissue. In the lip plane, the difference in the height of Ch-D and Ch-ND was significantly reduced (1.38 mm vs. 0.72 mm). In the anteroposterior axis, the ΔChZ-D/ND showed significant correlations with the mandibular setback. In the vertical axis, the ΔCh-ND showed significant correlations with the maxillary impaction of the non-deviated side. The improvement in lip asymmetry post-surgery was mainly achieved by the movement of the lower lip and Ch-D rather than the upper lip and Ch-ND.

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Section: Discussionsupporting

confidence: 90%

Three-Dimensional Change of Lip after Two-Jaw Surgery in Facial Asymmetry Using Facial Scanner

Kim

Choi

et al. 2022

Applied Sciences

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“…Supplementary Table 3 summarizes the NOS results. Most of the studies were assessed as moderate quality, 12 - 48 while a few were assessed as high quality. 14 , 49 - 62 The studies were classified as high quality when the comparability of cohorts was appropriately addressed based on the study design or analysis.…”

Section: Resultsmentioning

confidence: 99%

“…In a comprehensive review involving 44 studies, 12 - 43 , 49 - 60 77 outcome indicators were analyzed to assess skeletal symmetry before and after orthognathic surgery. The SMDs of skeletal symmetry according to one- and two-jaw surgery are shown in Figure 2 , with descriptions of the study groups and outcome variables in Table 3 .…”

Section: Resultsmentioning

confidence: 99%

Treatment outcome and long-term stability of orthognathic surgery for facial asymmetry: A systematic review and meta-analysis

Kim,

Jha

et al. 2024

Korean J Orthod

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Objective This systematic review aimed to provide a comparative analysis of the treatment outcomes, including hard and soft tissues, postoperative stability, temporomandibular disorders (TMD), and quality of life (QoL), in patients with facial asymmetry who underwent orthognathic surgery. Methods The primary objective was to address the question, “How do different factors related to surgery affect the outcomes and stability of orthognathic surgery in the correction of facial asymmetry?” A meta-analysis was conducted on the outcome parameters, such as skeletal, dental, and soft tissue symmetry, TMD, QoL, and relapse, using the Hartung–Knapp–Sidik–Jonkman method for random-effects models. Subgroup analyses were conducted considering surgery-related factors such as surgical techniques (one-jaw vs. two-jaw), use of the surgery-first approach, utilization of computer simulation, and analytical methods employed to evaluate asymmetry (2D vs. 3D). Results Forty-nine articles met the inclusion criteria. The meta-analysis demonstrated a significant improvement in the symmetry of hard and soft tissues. The subgroup analysis indicated that the treatment outcomes showed significant improvement, regardless of the factors related to surgery. Changes in TMD signs and symptoms varied according to the surgical technique used. Quality of life improved in the facial, oral, and social domains. Skeletal relapse was observed during the follow-up. Conclusions Our findings support the positive outcomes of orthognathic surgery in the treatment of facial asymmetry in terms of skeletal and soft tissue improvements, stability, relief of TMD symptoms, and enhancement of QoL. However, most of the included studies showed a low certainty of evidence and high heterogeneity.

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“…1 Clinically, malocclusion is characterized by changes in the shape, the position of teeth, number of teeth, dentition spacing, dental health and facial aesthetic problems, resulting in issues such as personality development disorders and psychological disorders. 2,3 Often, doctors are not able to fully consider patients' expectations and opinions. Rather, their treatment decisions are made based on their own clinical experience and expertise; therefore, the treatment is unable to fully meet patient expectations.…”

Section: Introductionmentioning

confidence: 99%

“…Malocclusion is influenced by various factors including congenital genetic and/or acquired environmental aspects 1 . Clinically, malocclusion is characterized by changes in the shape, the position of teeth, number of teeth, dentition spacing, dental health and facial aesthetic problems, resulting in issues such as personality development disorders and psychological disorders 2,3 . Often, doctors are not able to fully consider patients' expectations and opinions.…”

Section: Introductionmentioning

confidence: 99%

Effect of socioeconomic and malocclusion‐related factors on duration of orthodontic treatment by fixed appliance: A retrospective study

Shi

Cao

et al. 2023

Orthod Craniofacial Res

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ObjectivesThe aims of this study were to evaluate the effect of related factors that influence orthodontic treatment time and to identify the predictors of orthodontic treatment duration in a Chinese population.Materials and MethodsInformation for 29 sociodemographic, malocclusion and orthodontic treatment characteristics was collected. Patients were divided into two groups: the duration ≤24 months group and duration >24 months group. The treatment dates of the initial visit and end of orthodontic treatment were obtained to calculate duration. The data were subjected to univariate and multivariate logistic regression modelling to quantify the association between characteristics and the treatment duration; odds ratios (ORs) and 95% confidence intervals (95% CIs) are reported.ResultsOf 2120 patients, 704 patients (mean age, 15.9 ± 6.0 years) were included. Age, extraction, Bolton ratio (overall), rotated teeth, overjet and crowding (lower arch) were predictors for duration. The nomogram based on predictive factors exhibited strong discrimination ability, with concordance indices of 0.755 (95% CI = 0.712‐0.798) in the training cohort model and 0.717 (95% CI = 0.647‐0.787) in the validation cohort model. The calibration curves for the training and validation cohorts showed that the probabilities of the nomogram agreed well with actual probabilities.ConclusionsYoung age, non‐extraction and severe crowding (lower arch) can increase the chance of durations of ≤24 months. Rotated teeth, excessive overjet and Bolton ratio (overall) can increase the chance of durations of >24 months.

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Three-dimensional analysis of lip soft tissue changes and related jaw changes in patients with skeletal class III malocclusion and facial asymmetry

Cited by 4 publications

References 25 publications

Three-Dimensional Change of Lip after Two-Jaw Surgery in Facial Asymmetry Using Facial Scanner

Three-Dimensional Change of Lip after Two-Jaw Surgery in Facial Asymmetry Using Facial Scanner

Treatment outcome and long-term stability of orthognathic surgery for facial asymmetry: A systematic review and meta-analysis

Effect of socioeconomic and malocclusion‐related factors on duration of orthodontic treatment by fixed appliance: A retrospective study

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