Effects of the changes in the condylar long axis angle and condylar position on temporomandibular symptoms after intraoral vertical ramus osteotomy: a preliminary study
Effects of the changes in the condylar long axis angle and condylar position on temporomandibular symptoms after intraoral vertical ramus osteotomy: a preliminary study
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DOI：
10.1016/j.oooo.2019.08.012
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发表时间：
2019-12-01
影响因子：
2.9
通讯作者：
Umeda, Masahiro
中科院分区：
文献类型：
--
作者：
Rokutanda, Satoshi;Yamada, Shin-Ichi;Umeda, Masahiro
目的：本研究旨在描述口内垂直升支截骨术（IVRO）后髁突长轴和位置的变化对颞下颌症状以及近心段位置的影响。
研究设计：20名被诊断为颌骨畸形的日本患者接受了未行内固定的IVRO。在术后随访检查期间，利用计算机断层扫描评估髁突长轴和位置的长期变化，并进行t检验以进行比较。此外，还检查了颞下颌症状的变化。
结果：当近心段位于外侧时，近心段的轴向旋转程度有显著变化。当近心段位于后外侧时，髁突位置的向下变化有显著差异。当近心段位于外侧时，髁突位置的向前变化有显著差异；而且，当近心段位于外侧时，颞下颌症状消失。
结论：就颞下颌症状而言，近心段位于外侧可能是IVRO产生积极效果的一个重要因素。
Objective. This study was conducted to characterize the effects of the changes in the condylar long axis and position on temporomandibular symptoms with respect proximal segment position after intraoral vertical ramus osteotomy (IVRO).Study Design. Twenty Japanese patients with diagnosed jaw deformity underwent IVRO without internal fixation. Long-term changes in condylar long axis and position were assessed during postoperative follow-up examinations by using computed tomography, and t tests were performed for comparison. In addition, changes in temporomandibular symptoms were examined.Results. The degree of axial rotation of the proximal segment changed significantly when the proximal segment was located laterally. Downward changes in condylar position significantly differed when the proximal segment was located posterolaterally. Forward changes in condylar position significantly differed when the proximal segment was located laterally; moreover, when the proximal segment was located laterally, temporomandibular symptoms disappeared.Conclusions. Lateral location of the proximal segment may be an important factor in the positive effects of IVRO, with respect to temporomandibular symptoms.