Celakil Deniz, Ozdemir Fulya, Eraydin Feyza, Celakil Tamer
a Faculty of Dentistry, Department of Orthodontics , Yeditepe University , Istanbul , Turkey.
b Faculty of Dentistry, Department of Prosthodontics , Istanbul University , Istanbul , Turkey.
Cranio. 2018 May;36(3):174-180. doi: 10.1080/08869634.2017.1311395. Epub 2017 Apr 7.
To evaluate the effect of double jaw orthognathic surgery (OGS) on masticatory performance and electromyographic activity of the masseter and anterior temporal muscles in skeletal Class III patients.
Individuals were instructed to chew standardized round tablets of silicone impression material. The cumulative weight percentage was calculated using sieve analysis. The bilateral surface electromyographic activity of the muscles was evaluated. Following the orthodontic treatment, a stabilization splint was fabricated. Patients were instructed to wear it full-time until the surgical procedure occurred. Recordings were performed before the splint application (T0), after the splint application (T1), 1 month after the OGS (T2), and 6-8 months after the OGS (T3).
Median particle size of the chewed silicone material did not differ from T0 to T1 with the use of an occlusal splint (p > 0.05). However, it decreased from 9.46 to 6.92 cm from T2 to T3. From T0 to T3, a statistically significant decrease was found, following the surgical intervention (p < 0.01). A significant decrease in masticatory muscle activity was also observed during the relaxation test from T0 to T3, at which time it reached the control group value.
OGS enhanced masticatory function by improving occlusion in individuals with a dentofacial deformity.
评估双颌正颌手术（OGS）对骨性III类患者咀嚼性能以及咬肌和颞前肌肌电活动的影响。
指导受试者咀嚼标准化的硅橡胶印模材料圆形片。使用筛分分析计算累积重量百分比。评估双侧肌肉的表面肌电活动。正畸治疗后，制作稳定咬合板。指导患者在手术前一直佩戴。在佩戴咬合板前（T0）、佩戴咬合板后（T1）、OGS术后1个月（T2）以及OGS术后6 - 8个月（T3）进行记录。
使用咬合板时，从T0到T1，咀嚼后的硅橡胶材料的中位粒径无差异（p > 0.05）。然而，从T2到T3，其粒径从9.46厘米降至6.92厘米。从T0到T3，手术干预后发现有统计学意义的下降（p < 0.01）。在从T0到T3的放松测试中，咀嚼肌活动也显著下降，此时达到对照组水平。
OGS通过改善牙颌面畸形患者的咬合来增强咀嚼功能。
