Department of Clinical and Preventive Dentistry, Federal University of Pernambuco, Pernambuco, Brazil.
Department of oral and maxillofacial surgery, Dental School of Pernambuco. University of Pernambuco (FOP/UPE). Recife, Pernambuco, Brazil.
Braz Dent J. 2022 Mar-Apr;33(2):44-51. doi: 10.1590/0103-6440202204653.
Le Fort I osteotomy is widely used in orthognathic surgery to correct maxillary deformities. However, this osteotomy may be related with the increase of alar base width. The aims of the present study were to compare two alar cinch suture after Le Fort I osteotomy and observe which type presents a better result in controlling the enlargement of the alar base after maxillary repositioning in orthognathic surgery. A randomized clinical trial was carried out with 40 patients randomly assigned in two intervention groups: group 1 - patients submitted to internal suture and group 2 - patients submitted to external suture. Of the 40 patients, 65% were female and 35% were male. The mean age of the patients was 30,25 in group I and 28,6 in group II. There was an increase in the alar base width in both groups, with significant difference between the means (P < 0,001). It was possible to compare the evolution of the means of the alar base width between group I and group II. Thus, it was observed that the external technique (group II) better controlled alar base width after Le Fort I osteotomy. It was not possible to relate the enlargement of the alar cinch with maxillary movement performed (P > 0,05). Overall, alar base cinch suture is an essential component of Le Fort osteotomies to control the alar base width. In this study, the external technique was more effective when compared to the internal technique in controlling the enlargement of the alar base width.
Le Fort I 截骨术广泛应用于正颌外科以矫正上颌畸形。然而，这种截骨术可能与鼻翼基底宽度的增加有关。本研究的目的是比较 Le Fort I 截骨术后两种鼻翼缩紧缝线的效果，观察哪种方法在正颌外科上颌复位后控制鼻翼基底扩大方面效果更好。本研究采用随机临床试验，将 40 例患者随机分为两组干预组：组 1-患者接受内缝线，组 2-患者接受外缝线。40 例患者中，女性占 65%，男性占 35%。组 1 的患者平均年龄为 30.25 岁，组 2 的患者平均年龄为 28.6 岁。两组患者的鼻翼基底宽度均有增加，均值之间有显著差异（P<0.001）。可以比较组 1 和组 2 鼻翼基底宽度均值的演变。因此，观察到 Le Fort I 截骨术后外技术（组 2）更好地控制了鼻翼基底宽度。鼻翼缩紧缝线的扩大与上颌运动的关系无法确定（P>0.05）。总之，鼻翼基底缩紧缝线是 Le Fort 截骨术控制鼻翼基底宽度的重要组成部分。在这项研究中，与内技术相比，外技术在控制鼻翼基底宽度扩大方面更有效。
