Ooi K, Inoue N, Matsushita K, Yamaguchi H, Mikoya T, Kawashiri S, Tei K
Department of Oral and Maxillofacial Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa 920-8641 Japan.
Oral and Maxillofacial Surgery, Department of Oral Patho-biological Science, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7 Kita-ku, Sapporo, Hokkaido 060-8586 Japan.
J Maxillofac Oral Surg. 2021 Mar;20(1):95-99. doi: 10.1007/s12663-019-01318-6. Epub 2019 Dec 17.
The aim of this study was to compare body weight loss between postoperative intermaxillary fixation with metal wire and elastic traction and to investigate factors related to body weight loss after orthognathic surgery.
Subjects were 59 patients with dentofacial deformity, comprising 31 patients treated with intermaxillary fixation (IMF) and 28 patients treated with elastic traction without IMF (ELT) just after surgery. Body weight loss was measured at 1 week (T1) and 2 weeks (T2) after surgery. Body weight loss was compared between IMF and ELT, and factors related to body weight loss were statistically analyzed.
Body weight loss ratio was significantly increased in IMF (2.6%) rather than in ELT (1.4%) at T1, but only tended to be increased in both groups at T2, showing no statistical difference. Body weight loss ratio was significantly increased at T2 compared to T1 in both groups. Body weight loss was significantly greater at T2 than at T1.
Both IMF and ELT cause body weight loss after orthognathic surgery, but IMF causes body weight loss earlier than ELT and increased early body weight loss increases continuous body weight loss after orthognathic surgery.
本研究的目的是比较术后金属丝颌间固定与弹性牵引在体重减轻方面的差异，并探讨正颌外科手术后体重减轻的相关因素。
研究对象为59例牙颌面畸形患者，其中31例患者接受了颌间固定（IMF）治疗，28例患者术后仅接受了无颌间固定的弹性牵引（ELT）治疗。在术后1周（T1）和2周（T2）测量体重减轻情况。比较IMF组和ELT组的体重减轻情况，并对与体重减轻相关的因素进行统计学分析。
在T1时，IMF组的体重减轻率（2.6%）显著高于ELT组（1.4%），但在T2时两组仅呈上升趋势，无统计学差异。与T1相比，两组在T2时体重减轻率均显著升高。T2时的体重减轻显著大于T1时。
正颌外科手术后，IMF和ELT均会导致体重减轻，但IMF导致体重减轻的时间早于ELT，且早期体重减轻的增加会使正颌外科手术后的持续体重减轻增加。
