摘要
目的 比较下颌升支矢状截骨术 (sagittalsplitramusosteotomy ,SSRO)和下颌升支垂直截骨术 (intraoralverticalramusosteotomy ,IVRO)后退下颌对口颌系统功能的影响。方法 2 7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(6 3 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 。
Objective To compare the effect of the mandible setbacked by sagittal split ramus osteotomy (SSRO) and intraoral vertical ramus osteotomy (IVRO) on gnathostomatic system Methods 27 cases with mandibular prognathism were treated,16 received SSRO and 11 IVRO Their occlusal force and masticatory efficiency were measured preoperatively and at 3 and 6 months after operation The condylar positions were assessed by radiography before surgery and at 6 months postoperatively Results In three months postoperatively ,the occlusal force and masticatory efficiency of IVRO group was decreased more than that of SSRO group At six months postoperatively ,the occlusal force and masticatory efficiency of SSRO group recovered quicker than IVRO group and better than that of before operation In IVRO group, the occlusal force approached the preoperative level ,the masticatory efficiency was better than preoperative value 26/32 (81 2%) condyles were relatively retropositioned in SSRO group ,14/22 (63 6%) condyles were relatively forward positioned in IVRO group Conclusions The function recovery time after surgery was shorter in SSRO group The masticator muscles were detached in varying degree and the bone segments healed slowly ,the effect on gnathostomatic system was greater and recovery time after surgery was longer in the IVRO group
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2000年第3期181-183,共3页
Chinese Journal of Stomatology
