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Comparison of effect of the mandible setbacked by SSRO and IVRO on gnathostomatic system
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF STOMATOLOGY
- Issue:
- 3
- DOI:
- 10.3760/j.issn:1002-0098.2000.03.006
- Key Word:
- 颌畸形;下颌骨;正颌外科
Abstract： 目的 比较下颌升支矢状截骨术(sagittal split ramus osteotomy,SSRO)和下颌升支垂直截骨术(intraoral vertical ramus osteotomy,IVRO)后退下颌对口颌系统功能的影响.方法 27例下颌前突患者(16例接受SSRO,11例接受IVRO)分别在术前、术后3个月、6个月测定其力、咀嚼效能及髁突位置.结果 术后3个月时,两组患者的力、咀嚼效能均有不同程度下降,IVRO组下降更为明显.术后6个月时,SSRO组患者的力、咀嚼效能的均值已超过术前,而IVRO组患者的力均值接近术前,咀嚼效能均值也超过术前.SSRO组患者术后髁突多数(81.2%)向前移位,而IVRO组髁突多数(63.6%)向前移位.结论 接受SSRO手术的患者,术后功能恢复比较快,由于在IVRO术中咀嚼肌被程度不同的剥离,加之近远心骨段间愈合较慢,故在术后短期内,对口颌系统功能的影响较大.
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