Facial soft-tissue changes in skeletal Class III orthognathic surgery patients analyzed with 3-dimensional laser scanning

OBJECTIVE: To investigate three-dimensional soft tissue changes of lips and related jaw changes in patients with skeletal class III malocclusion and facial asymmetry using cone-beam computerized tomography (CBCT). METHOD: This study included 46 CBCT scans of patients with aforementioned character before (T1) and 6–12 months after orthognathic surgery (T2). Subjects were divided into 2 groups according to two types of orthognathic surgery namely, the one-jaw surgery group who underwent bilateral sagittal splint ramus osteotomy (BSSRO) and the two-jaw surgery group who underwent Le Fort I osteotomy and BSSRO. Mimics 19.0 software are used for model reconstruction, landmark location and three-dimensional cephalometric analysis. Descriptive statistics and correlation analyses are used to investigate jaw hard tissue and lip soft tissue changes. RESULTS: In one-jaw group, the mandible shows changes in contour and position (p < 0.05), and the surgery causes changes of lip structure on the deviated side. While in two-jaw group, jaws only show changes in spatial position, and surgery changes contour of bilateral lips and nasolabial angle (p < 0.05). At the same time, lip symmetry increases significantly in both groups postoperatively. CONCLUSIONS: Orthognathic surgery can improve lip aesthetics in patients with skeletal class III malocclusion and facial asymmetry. However, changes induced by two surgical approaches are different. Surgeons should have a clear acquaintance with this difference to deal with different situations.

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A comparison of postoperative, three-dimensional soft tissue changes in patients with skeletal class III malocclusions treated via orthodontics-first and surgery-first approaches

Journal of Cranio-Maxillofacial Surgery ◽

10.1016/j.jcms.2021.04.011 ◽

2021 ◽

Author(s):

Daigo Okamoto ◽

Kensuke Yamauchi ◽

Mai Yazaki ◽

Shizu Saito ◽

Hikari Suzuki ◽

...

Keyword(s):

Soft Tissue ◽

Three Dimensional ◽

Class Iii ◽

Skeletal Class ◽

Tissue Changes ◽

Surgery First ◽

Soft Tissue Changes

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Three-Dimensional Analysis Techniques—Part 1: Three-Dimensional Soft-Tissue Analysis of 24 Adult Cleft Palate Patients following Le Fort I Maxillary Advancement: A Preliminary Report

The Cleft Palate-Craniofacial Journal ◽

10.1597/1545-1569_1997_034_0036_tdatpt_2.3.co_2 ◽

1997 ◽

Vol 34 (1) ◽

pp. 36-45 ◽

Cited By ~ 9

Author(s):

Andrew M. Mccance ◽

James P. Moss ◽

W. Rick Fright ◽

Alf D. Linney ◽

David R. James

Keyword(s):

Soft Tissue ◽

Laser Scanning ◽

Three Dimensional ◽

Tissue Analysis ◽

Facial Soft Tissue ◽

Le Fort ◽

Analysis Techniques ◽

Tissue Changes ◽

Soft Tissue Changes ◽

Le Fort I

The three-dimensional, facial soft-tissue changes of 24 patients with various cleft types following transpalatal Le Fort I osteotomy were measured using laser scanning techniques, radial measurements, and a color millimetric scale. There was a varying degree of midface retrusion in the different cleft groups, and a very similar pattern of retrusion over the nasal complex. Each group of patients showed a varying degree of relapse postsurgically, but there was a failure in all the cleft groups to correct the lack of nasal projection.

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