Frey Daniela Rezende, Hatch John P, Van Sickels Joseph E, Dolce Calogero, Rugh John D
Department of Orthodontics, The University of Texas Health Science Center, San Antonio, Texas 78229-3900, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2007 Aug;104(2):160-9. doi: 10.1016/j.tripleo.2006.12.023. Epub 2007 Apr 11.
We investigated predictors of long- and short-term stability of surgical mandibular advancements with bilateral sagittal split osteotomy (BSSO).
Class II patients (n = 127) received mandibular advancement through BSSO with either rigid internal fixation or wire osteosynthesis. We used multiple linear regression analysis to assess the association of predictor variables with post-treatment horizontal and vertical B-point movement through 2 years.
Counterclockwise rotation of the mandibular plane angulation (MPA) was associated with greater horizontal and vertical relapse at all time periods except 8 weeks. Wire osteosynthesis, larger advancements, younger age, and genioplasty were significantly associated with relapse.
Surgically closing the MPA is associated with late horizontal and vertical relapse, whereas fixation type is related to early B-point movement. Large advancements with forward and upward repositioning of the mandible, genioplasty, and young age also play a role in relapse after BSSO.
我们研究了双侧矢状劈开截骨术（BSSO）进行下颌骨前移手术的长期和短期稳定性的预测因素。
II类患者（n = 127）通过BSSO进行下颌骨前移，采用坚固内固定或钢丝骨固定术。我们使用多元线性回归分析来评估预测变量与治疗后2年内水平和垂直B点移动的关联。
除8周外，下颌平面角（MPA）的逆时针旋转在所有时间段均与更大的水平和垂直复发相关。钢丝骨固定术、更大的前移量、更年轻的年龄和颏成形术与复发显著相关。
手术闭合MPA与后期水平和垂直复发相关，而固定类型与早期B点移动有关。下颌骨向前向上重新定位的大前移量、颏成形术和年轻年龄在BSSO术后复发中也起作用。
