Yang Hoon Joo, Hwang Soon Jung
Orthognathic Surgery Center, Seoul National University Dental Hospital, Korea.
Department of Oral and Maxillofacial Surgery, Seoul National University Dental Hospital, School of Dentistry, Dental Research Institute, BK 21 Plus, Seoul National University, Korea.
Oral Surg Oral Med Oral Pathol Oral Radiol. 2015 Aug;120(2):112-8. doi: 10.1016/j.oooo.2015.03.004. Epub 2015 Mar 25.
The aim of this study was to analyze contributing factors for postoperative relapse after orthognathic surgery in patients with preoperative idiopathic condylar resorption (ICR).
Sixteen female patients with mandibular retrognathism and ICR were included in this prospective study. For patient factors, serum 17 β-estradiol (E2), bone mineral density, and the preoperative posterior condylar inclination were evaluated. Bone mineral density was measured using dual-energy x-ray absorptiometry (DEXA) bone densitometry and expressed by T-score. Surgical changes and postoperative relapse were measured with cephalometric analysis. The correlation between postoperative relapse and measured parameters was statistically analyzed.
The lowest T-score exhibited a significant correlation with postoperative clockwise rotation and posterior relapse tendency of the mandible (P < .05). The amount of mandibular advancement showed a significant correlation with the postoperative clockwise rotation of the mandible (P < .05).
The postoperative relapse tendency in patients with preoperative ICR is significantly related to the lowest T-score and the amount of mandibular advancement.
本研究旨在分析术前患有特发性髁突吸收（ICR）的患者正颌手术后复发的相关因素。
本前瞻性研究纳入了16例患有下颌后缩和ICR的女性患者。对于患者因素，评估血清17β-雌二醇（E2）、骨密度以及术前髁突后倾角。使用双能X线吸收法（DEXA）骨密度测定仪测量骨密度，并以T值表示。通过头影测量分析评估手术变化和术后复发情况。对术后复发与测量参数之间的相关性进行统计学分析。
最低T值与术后下颌顺时针旋转及下颌后移倾向显著相关（P < 0.05）。下颌前徙量与术后下颌顺时针旋转显著相关（P < 0.05）。
术前患有ICR的患者术后复发倾向与最低T值和下颌前徙量显著相关。
