Preliminary Study to Determine the Reference Plane of Patients with a Unilateral Cleft Lip and Palate

Kim, Nari; Park, Soo‐Byung; Shin, Sang Min; Choi, Yong-Seok; Kim, Seong-Sik; Son, Woo‐Sung; Kim, Yong‐Il

doi:10.1597/16-026

Cited by 1 publication

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References 22 publications

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“…The construction of optimal facial planes based on landmarks that are minimally affected by facial asymmetry is a fundamental step for the clinical evaluation of facial asymmetry. In this regard, Kim et al [ 36 ] suggested that the landmark-based reference plane was compatible with reference planes from Procrustes analysis. Therefore, for the present study, we defined reference planes on the basis of the landmark-based technique.…”

Section: Discussionmentioning

confidence: 98%

“…Increasing the number of patients may be required to delineate the results. Finally, although the landmark-based method for reference plane estimation has been shown to be comparable with semiautomatic and automatic techniques [ 36 ], errors related to the manual digitization of landmarks may exist, since digitization depends upon the ability of the observer to identify them precisely. However, the intraobserver reliability was excellent for the landmarks used in the current study.…”

Section: Discussionmentioning

confidence: 99%

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Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes

et al. 2022

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Objective The present study aimed to determine the site and severity of maxillomandibular asymmetry before and after orthognathic surgery in asymmetric patients. Materials and methods Presurgery and postsurgery cone beam computed tomography (CBCT) data of 21 facial asymmetry patients (7 males and 14 females, mean age: 23.0 ± 3.36 years) with soft tissue chin deviation ≥ 3 mm who had undergone bimaxillary surgery were evaluated. Seven midline and twenty bilateral hard tissue landmarks were identified for the evaluation of facial asymmetry and outcomes were assessed against age- and gender-matched control subjects. Results In the asymmetry group, bilateral landmarks exhibited significant deviation in the mandible and midface regions. Before surgery, asymmetry was more severe at the mandibular midline and sites close to it, in the asymmetry group. Bimaxillary surgery proved to be highly effective, with a significant correction of the menton to a clinically normal value (2.90 mm, p < 0.001). After surgery, significant residual asymmetry was observed at the mental foramen (p = 0.001) in the R-L direction. Moreover, significant asymmetry persisted at the sigmoid notch (p = 0.001) in the S-I direction. Conclusions Mandibular midline landmarks and chin peripheral regions contribute significantly to overall facial asymmetry characteristics. Despite significant correction after bimaxillary surgery, asymmetry persisted at several sites, thereby requiring secondary correction. Comprehensive 3D presurgical planning is central for asymmetry correction in a single surgery. Clinical relevance The present study specifies the location of residual asymmetry sites and advocates the correction of those sites during initial surgery.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes

et al. 2022

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Preliminary Study to Determine the Reference Plane of Patients with a Unilateral Cleft Lip and Palate

Abstract: It was confirmed that the midsagittal reference planes from these selected landmarks for UCLP patients were compatible with symmetric midsagittal reference planes from the Procrustes analysis and the asymmetric measurements.

Cited by 1 publication

References 22 publications

Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes

Three-dimensional assessment of facial asymmetry in Class III subjects. Part 1: a retrospective study evaluating postsurgical outcomes

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