Budharapu Abhishek, Sinha Ramen, Tauro David P, Tiwari Prabhat K
1Department of Head and Neck Oncology, Apollo Cancer Hospital, Jubilee Hills, Hyderabad, Telangana 500096 India.
2Department of Oral and Maxillofacial Surgery, Sri Sai College of Dental Surgery, Hyderabad, India.
J Maxillofac Oral Surg. 2018 Jun;17(2):233-241. doi: 10.1007/s12663-017-1025-8. Epub 2017 Jun 9.
The aim of this study was to evaluate cephalometrically the stability of hard tissues and soft tissue changes of advancement genioplasty 2 years after surgery.
A prospective study was conducted which comprised of 25 patients, who underwent advancement genioplasty alone with no other orthognathic surgical procedures. Immediate pre-operative, 6 months postoperative, and 2 years postoperative lateral cephalograms were compiled and assessed.
The mean surgical advancement planned was around 8 mm. Six months post-surgery, the relapse rate was 15% of the surgical advancement which was considerably reduced in the following 18 months to 7%. The ratio of soft tissue to bony advancement at pogonion was 0.9:1. There are significant alterations in the soft tissue profile in terms of decrease in the soft tissue thickness, facial convexity angle, deepened mentolabial sulcus and minimal increase in the lower lip height.
Advancement genioplasty was considered as a relatively stable procedure, if adequate muscular pedicle and internal rigid fixation were maintained. The present study was of 2 years, and we can expect further changes in the hard and soft tissues, which are clinically irrelevant.
本研究旨在通过头影测量法评估颏成形术术后2年硬组织的稳定性和软组织变化。
进行了一项前瞻性研究，纳入25例仅接受颏成形术且未进行其他正颌外科手术的患者。收集并评估术前即刻、术后6个月和术后2年的头颅侧位片。
计划的平均手术前移量约为8mm。术后6个月，复发率为手术前移量的15%，在接下来的18个月中显著降低至7%。颏点处软组织与骨组织前移的比例为0.9:1。软组织轮廓有显著改变，表现为软组织厚度减小、面部凸度角减小、颏唇沟加深以及下唇高度略有增加。
如果保持足够的肌肉蒂和内固定，颏成形术被认为是一种相对稳定的手术。本研究为期2年，我们可以预期硬组织和软组织会有进一步变化，但在临床上并无关联。
