3D Facial Imaging Research Group Nijmegen-Bruges, Nijmegen, The Netherlands.
Int J Oral Maxillofac Surg. 2009 Dec;38(12):1244-9. doi: 10.1016/j.ijom.2009.07.013. Epub 2009 Aug 26.
The purpose of this prospective observational study was to evaluate whether cone beam CT (CBCT) is a useful tool for analyzing the fracture line in a bilateral sagittal split osteotomy (BSSO). The patient group consisted of 40 consecutive patients (9 males and 31 females) with a mandibular hypoplasia who underwent a BSSO advancement (Hunsuck modification; n=80 splits) between September 2006 and July 2008. The mean age at the time of surgery was 34 years (range 17-61 years). A newly developed lingual split scale was used to categorize the path of the fracture line on the lingual side of the ramus based on one-day postoperative data sets reconstructed from CBCT data. Although all splits (n=80) were performed according to the standardized protocol, only 51% of the fracture lines run according to the Hunsuck's description, whereas 33% ran through the mandibular canal and 16% split otherwise. The split pattern was influenced by the length of the medial osteotomy (p=0.01). In conclusion, 3D imaging is a useful tool for analyzing the surgical outcome of a BSSO and has the potential to provide substantial data on the position of the proximal segments as a result of the lingual fracture line.
本前瞻性观察研究旨在评估锥形束 CT（CBCT）是否可作为分析双侧矢状劈开截骨术（BSSO）骨折线的有用工具。患者组包括 2006 年 9 月至 2008 年 7 月期间接受 BSSO 推进术（Hunsuck 改良；80 个劈裂）的 40 例下颌后缩患者（9 名男性和 31 名女性）。手术时的平均年龄为 34 岁（17-61 岁）。根据 CBCT 数据重建的术后 1 天数据集，使用新开发的舌侧劈裂刻度来对髁突舌侧骨折线的路径进行分类。尽管所有的劈裂（n=80）均按照标准化方案进行，但只有 51%的骨折线符合 Hunsuck 的描述，33%穿过下颌管，16%则为其他劈裂。劈裂模式受内侧截骨长度的影响（p=0.01）。总之，3D 成像技术是分析 BSSO 手术效果的有用工具，并且有可能提供有关由于舌侧骨折线导致近端节段位置的大量数据。
