Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K Ueki), Division of Medicine, Interdisciplinary Graduate School, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi, 409-3898, Japan.
Department of Oral and Maxillofacial Surgery (Head: Prof. Dr. K Ueki), Division of Medicine, Interdisciplinary Graduate School, University of Yamanashi, 1110 Shimokato, Chuo-shi, Yamanashi, 409-3898, Japan.
J Craniomaxillofac Surg. 2023 Sep;51(9):536-542. doi: 10.1016/j.jcms.2023.07.007. Epub 2023 Aug 1.
This study aimed to compare the bone healing and stability of the chin with a pre-bent absorbable plate and a manually bent absorbable plate after advancement genioplasty. Patients with class II malocclusion who underwent genioplasty with bimaxillary surgery were included. After genioplasty, two absorbable bicortical screws were fixed on both sides. Then, a pre-bent absorbable plate and screws were used in the center area to fix the segment in advancement genioplasty (PB group). A manually bent absorbable plate was used for the remaining patients (MB group). Computed tomography (CT) was performed before surgery and 1 week and 1 year after surgery. Changes in the pogonion (Pog) and menton (Me) points, soft tissue points, and the ratio of bone squares under the plate were evaluated using lateral cephalometric images reconstructed with 3-dimensional CT data. 32 patients were included in the study. There were no significant differences in the cephalometric measurements in the time interval from 1 week to 1 year. However, the bone square ratio in the PB group showed a significant increase after 1 year (P = 0.0021). Within the limitations of the study it seems that the use of a pre-bent absorbable plate is effective in promoting bone healing after advancement genioplasty.
本研究旨在比较颏部推进成形术后预弯可吸收板和手动弯可吸收板的骨愈合和稳定性。纳入接受双颌手术的 II 类错颌患者。颏成形术后，在两侧固定两根可吸收双皮质螺钉。然后，在中心区域使用预弯可吸收板和螺钉固定推进颏成形术的节段（PB 组）。其余患者使用手动弯可吸收板（MB 组）。术前及术后 1 周和 1 年进行计算机断层扫描（CT）检查。使用三维 CT 数据重建侧位头颅侧位片，评估颏前点（Pog）和颏下点（Me）、软组织点的变化，以及板下骨方块的比例。本研究纳入 32 例患者。从 1 周到 1 年的时间间隔内，头影测量值无显著差异。然而，PB 组的骨方块比值在 1 年后显著增加（P=0.0021）。在研究的限制内，似乎使用预弯可吸收板有利于促进推进颏成形术后的骨愈合。
