Masticatory function in patients with jaw deformity before and after orthognathic surgery

颌骨畸形患者正颌手术前后咀嚼功能的变化

• 批准号: 03670940
• 负责人: KOBAYASHI Tadaharu
• 金额: $ 1.34万
• 依托单位: Niigata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03670940/
• 关键词: Jaw deformity; Orthognathic surgery; Masticatory efficiency; EMG analysis; 顎口腔機能; 咬合接触点数; 咬合接触面積

Masticatory function was analyzed in patients with mandibular prognathism before and after orthognathic treatment and in adults with normal occlusion. Masticatory efficiency was measured using ATP granules, silicone impression and chewing gum. Occlusal contact was evaluated by calculating the numger and area of occlusal contacts from the illuminated images of a silicone record of the occlusion that was stored in the image analysis system with the aid of a charge-coupled device camera. Masticatory rhythm and activity during gum chewing was analyzed using EMG.In the masticatory efficiency using ATP granules, the mean value of the preoperative group was approximately half that of the control group. The value for the postoperative group was slightly higher than that for the preoperative group, but there was no statistical difference between the two groups. Likewise, in the masticatory efficiency using silicone impression the mean value of the preoperative group was also less as compared wi … More th that of the control group, and that did not show significant change postoperatively. On the other hand, in the masticatory efficiency using chewing gum there were no statistical diggerences between the jaw deformity groups and the control group. The number and area of occlusal contacts in the preoperative group were also approximately half or less as compared with those of the control group, and they did not show significant changes postoperatively. Statistically, there were correlations between the masticatory effisiency and the number and area of occlusal contacts. The results indicate that although the occlusal relationship of the upper and lower teeth were greatly improved by orthognathic treatment, the postoperative occlusion is not tight enough. In the cycle time during gun chewing, there was no statistical difference between the jaw deformity group and the control group, but the coefficient of variation of the cycle time for the jaw deformity group was significantly highwr than that for the control group. Integrated electromyographic activity of the jaw deformity group was significantly less as compared with that of the control group. Less

分析下颌多颌畸形患者正颌治疗前后及正常成人的咀嚼功能。使用ATP颗粒、硅胶印模和口香糖测量咀嚼效率。咬合接触通过计算咬合接触的数量和面积来评价，咬合接触来自在电荷耦合器件相机的帮助下存储在图像分析系统中的咬合的硅胶记录的照明图像。咀嚼口香糖期间的咀嚼节律和活动进行了分析，在使用ATP颗粒的咀嚼效率，术前组的平均值约为对照组的一半。术后组的数值略高于术前组，但两组之间无统计学差异。同样，在使用硅橡胶印模的咀嚼效率中，术前组的平均值也低于术前组， ...更多信息 结果：术后1、2、3、4、6、12、14、18、19、20、21、22、24、28、29、而咀嚼口香糖的咀嚼效率在颌畸形组与对照组之间无统计学差异。术前组咬合接触的数量和面积也约为对照组的一半或更少，术后无明显变化。统计学上，咀嚼效率与咬合接触的数目和面积相关。结果表明，虽然正颌治疗后上下牙咬合关系有了很大改善，但术后咬合关系仍不够紧密。在咀嚼枪的周期时间上，颌畸形组与对照组无统计学差异，但颌畸形组的周期时间变异系数显著高于对照组。颌畸形组的综合肌电活动明显低于对照组。少

项目成果

Tadaharu Kobayashi: "Masticatory function in patients with mandibular prognathism before and after orthognathic surgery" J Oral Maxillofac Surg. 51. 997-1001 (1993)

Tadaharu Kobayashi：“下颌前突患者正颌手术前后的咀嚼功能”J Oral Maxillofac Surg。