Changes in the condylar head after orthognathic surgery in Class III patients: a retrospective three-dimensional study.

IF 3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Angle Orthodontist Pub Date : 2022-11-21 DOI:10.2319/052922-394.1

Betul Nazli Gulcek, Elvan Onem Ozbilen, Sibel Biren

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引用次数: 0

Abstract

Objectives: To evaluate the axial and dimensional changes of the condylar head after orthognathic surgery, including Le Fort I and bilateral sagittal split ramus osteotomies, and to assess condylar remodeling through three-dimensional (3D) surface superimposition.

Materials and methods: Twenty-four patients (15 females, 9 males; mean age: 32.22 ± 6.92 years) with skeletal Class III deformity were included in the study. Cone-beam computed tomography data obtained in the preoperative (T0) and postoperative (T1) periods were examined using Mimics and 3-Matic software. The height, depth, and width of the condylar head and its angular changes were measured. The volumes of the 3D reconstructed models were calculated, and remodeling amounts were evaluated through regional surface superimposition. Statistical significance was set at P < .05.

Results: Following the surgery, there was a significant decrease in the size of condyles (P < .05). An inward rotation of the condyles was found in the axial plane (T0: 79.60 ± 6.01°, T1: 76.6 ± 6.48°, P < .05). The maximum resorption, maximum apposition, mean remodeling, and mean absolute remodeling were -2.63 ± 1.23 mm, 1.15 ± 0.4 mm, -0.30 ± 0.34 mm, and 0.73 ± 0.43 mm, respectively. No correlation was found between the angular changes and remodeling parameters or linear and volumetric changes of the condylar head (P > .05).

Conclusions: Condyles undergo a remodeling process with a resorptive character following orthognathic surgery, without clinically significant effects in the present study.

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III 类患者正颌手术后髁状突头部的变化：一项回顾性三维研究。

目的评估正颌手术（包括 Le Fort I 和双侧矢状劈裂臼骨截骨）后髁状突头的轴向和尺寸变化，并通过三维（3D）表面叠加评估髁状突重塑情况：研究对象包括 24 名骨骼 III 级畸形患者（15 名女性，9 名男性；平均年龄：32.22 ± 6.92 岁）。使用 Mimics 和 3-Matic 软件对术前（T0）和术后（T1）获得的锥形束计算机断层扫描数据进行了检查。测量了髁状突头部的高度、深度和宽度及其角度变化。计算三维重建模型的体积，并通过区域表面叠加评估重塑量。统计学意义以 P < .05 为标准：结果：手术后，髁突体积明显缩小（P < .05）。髁状突在轴向出现内旋（T0：79.60 ± 6.01°，T1：76.6 ± 6.48°，P < .05）。最大吸收、最大贴合、平均重塑和平均绝对重塑分别为 -2.63 ± 1.23 mm、1.15 ± 0.4 mm、-0.30 ± 0.34 mm 和 0.73 ± 0.43 mm。髁头的角度变化与重塑参数或线性和体积变化之间没有相关性（P > .05）：结论：髁状突在正颌手术后会发生具有吸收性的重塑过程，但在本研究中没有发现明显的临床影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Angle Orthodontist 医学-牙科与口腔外科

CiteScore

6.40

自引率

5.90%

发文量

审稿时长

3 months

期刊介绍： The Angle Orthodontist is the official publication of the Edward H. Angle Society of Orthodontists and is published bimonthly in January, March, May, July, September and November by The EH Angle Education and Research Foundation Inc. The Angle Orthodontist is the only major journal in orthodontics with a non-commercial, non-profit publisher -- The E. H. Angle Education and Research Foundation. We value our freedom to operate exclusively in the best interests of our readers and authors. Our website www.angle.org is completely free and open to all visitors.