这项研究的目的是评估LeFortI截骨术后鼻唇沟软组织的变化,关注上颌垂直复位的影响。这项回顾性研究包括2013年至2021年间39例有LeFort1截骨术史的患者。患者根据上颌运动分为三类:纯前移(A组),推进与冲击(B组),以及向下重新定位的进步(C组)。分析术前和术后CBCT(锥形束计算机断层扫描)数据以测量鼻唇沟软组织的变化。当前的研究使用MimicsSuite20.0来测量线性和角度变量。评估的变量包括can间距离,鼻背长度,尖端突起,口宽,鼻翼宽度,上唇高度,鼻孔尺寸,和鼻唇沟的角度,阿拉尔基地,和上唇。其中canthal距离,鼻背长度,或尖端突出显示无统计学差异(p>0.05)。口宽,鼻翼宽度,鼻翼底角显著增大,上唇角显著减小(p<0.001)。上唇高度和鼻唇沟角度的变化在研究组之间有所不同。而A组和C组上唇高度显著增加(p<0.05),B组有轻微下降,无显著性差异(p>0.05)。A组和B组的鼻唇角显著降低(p<0.05)。这项研究的结果揭示了一些软组织参数的变化,其中一些发生与上颌骨的垂直重新定位无关。在研究的局限性内,上颌前移手术会影响鼻唇沟区域的美观,并引起相关软组织的特定变化。了解这些变化对于建立现实的患者期望并实现最佳的功能和美学结果至关重要。
The aim of this study is to evaluate the changes in nasolabial soft tissues following Le Fort I osteotomies, focusing on the impact of maxillary vertical repositioning. This retrospective study included 39 patients with a history of Le Fort 1 osteotomy between 2013 and 2021. Patients were grouped based on their maxillary movement into three categories: pure advancement (group A), advancement with impaction (group B), and advancement with downward repositioning (group C). Preoperative and postoperative CBCT (Cone Beam Computed Tomography) data were analyzed to measure the changes in nasolabial soft tissues. The current study utilized Mimics Suite 20.0 for measuring linear and angular variables. The evaluated variables included intercanthal distance, nasal dorsal length, tip protrusion, mouth width, alar width, upper lip height, nostril dimensions, and angles of nasolabial, alar base, and upper lip. Among them intercanthal distance, nasal dorsal length, or tip protrusion showed no statistical difference (p > 0,05). Mouth width, alar width, alar base angle were increased and upper lip angle was decreased significantly (p < 0.001). Changes in upper lip height and nasolabial angle differed among the groups of the study. While upper lip height increased significantly in groups A and C (p < 0.05), there was a slight decrease in Group B with no significance (p > 0.05). Nasolabial angle decrased significantly on Groups A and B (p < 0.05). The results of this study revealed changes in several soft tissue parameters, some of which occurred regardless of vertical repositioning of the maxilla. Within the limitations of the study, maxillary advancement surgery can affect the aesthetics of the nasolabial region and cause specific changes in related soft tissues. Understanding these changes is essential to establish realistic patient expectations and achieve optimal functional and aesthetic outcomes.