Watanabe Masahiko, Kawai Nobuhiko, Shibata Manami, Nakaue Emiko, Horiuchi Shinya, Tanaka Eiji
Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Oral Sciences, Tokushima, Japan.
Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan.
J Dent Sci. 2022 Jul;17(3):1217-1224. doi: 10.1016/j.jds.2021.12.007. Epub 2021 Dec 21.
BACKGROUND/PURPOSE: Patients with jaw deformities may show a reduction in masticatory function as a result of postoperative hypofunction. This study aimed to establish a novel rehabilitation program using a commercially available masticatory training food for patients with jaw deformities after orthognathic surgery.
Nine patients with mandibular prognathism (the training group: n = 5, and the non-training group: n = 4) and 6 control participants with normal occlusion were included in this study. For the rehabilitation program with masticatory exercise, patients were instructed to chew the training food once a day for 60 days starting from 10 days after the surgery. The effects of the rehabilitation program were assessed by determining the maximum bite force (MBF) and the masticatory performance (MP). Clinical assessments were performed just before orthognathic surgery (Pre) and at 10 days (T0), 1 month (T1), 2 months (T2), and 3 months (T3) after surgery.
Compared with the non-training group, the training group showed a trend toward greater recovery amount of MBF from Pre to T3, and a significantly greater recovery amount in MP (p < 0.05) from Pre to T3. When the time-series change of MP was evaluated in both groups from T0 to T3, a significant difference was observed in the interaction terms (p = 0.03). This result indicates that the effectiveness of the training may be demonstrated by following the postoperative course further.
The rehabilitation using this training food may become a useful method for postoperative hypofunction in patients with jaw deformities.
背景/目的：颌骨畸形患者术后可能因功能减退而出现咀嚼功能下降。本研究旨在为正颌外科手术后的颌骨畸形患者建立一种使用市售咀嚼训练食品的新型康复方案。
本研究纳入9例下颌前突患者（训练组：n = 5，非训练组：n = 4）和6例咬合正常的对照参与者。对于咀嚼运动康复方案，患者在术后10天开始，每天咀嚼训练食品1次，持续60天。通过测定最大咬合力（MBF）和咀嚼性能（MP）评估康复方案的效果。在正颌外科手术前（Pre）以及术后10天（T0）、1个月（T1）、2个月（T2）和3个月（T3）进行临床评估。
与非训练组相比，训练组从Pre到T3的MBF恢复量有增加趋势，从Pre到T3的MP恢复量显著更大（p < 0.05）。当评估两组从T0到T3的MP时间序列变化时，交互项存在显著差异（p = 0.03）。该结果表明，随着术后病程的延长，训练的有效性可能会得到体现。
使用这种训练食品进行康复可能成为颌骨畸形患者术后功能减退的一种有效方法。
