Effect of the Occlusal Profile on the Masticatory Performance of Healthy Dentate Subjects
Effect of the Occlusal Profile on the Masticatory Performance of Healthy Dentate Subjects
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DOI：
10.11607/ijp.3793
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发表时间：
2014-07-01
影响因子：
2.3
通讯作者：
Hellmann, Daniel
中科院分区：
文献类型：
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作者：
Giannakopoulos, Nikolaos N.;Wirth, Alexander;Hellmann, Daniel
目的：本研究的目的是在咀嚼性能(MP)、总肌肉功(TMW)和活动范围(Rom)的基础上，检查牙尖轮廓的减少是否会导致健康齿状患者咀嚼的生物力学效果的丧失。方法：20例健康患者(女性10例，平均年龄24.1±1.2岁)，咀嚼标准硅胶颗粒，进行15个咀嚼周期。研究了三种实验条件：咀嚼(1)自然牙列(ND)，(2)模拟患者自然牙列(SS)的有结构的咬合轮廓的夹板，(3)平面的夹板(PS)。通过有效的扫描程序分析咳出的颗粒。用Rosin-Rammler函数计算了颗粒的尺寸分布，并确定了每个实验条件下的平均颗粒尺寸(X-50)。用重复测量方差分析比较实验条件的目标变量。结果：SS组与ND组MP的X-50值差异有统计学意义(P<0.05)。在肌肉活动方面，左侧和右侧之间咬肌的肌电活动有显著差异(P<；.001)，右侧(咀嚼)的值更高。在三种测试条件下，TMW和rom没有显著差异(P>；0.05)。结论：研究结果证实了咬合面结构在年轻受试者咀嚼脆性食物时的生物力学意义。
Purpose: The purpose of this study was to examine, on the basis of masticatory performance (MP), total muscle work (TMW), and range of movement (RoM), whether reduction of the profile of the cusps results in loss of the biomechanical effectiveness of chewing by healthy dentate patients. Methods: Twenty healthy patients (10 female, mean age: 24.1 +/- 1.2 years) chewed standardized silicone particles, performing 15 masticatory cycles. Three experimental conditions were investigated: chewing on (1) the natural dentition (ND), (2) splints with structured occlusal profiles simulating the patient's natural dentition (SS), and (3) splints with a plane surface (PS). The expectorated particles were analyzed by a validated scanning procedure. The size distribution of the particles was calculated with the Rosin-Rammler function and the mean particle sizes (X-50) were determined for each experimental condition. The target variables of the experimental conditions were compared by repeated measures analysis of variance. Results: X-50 values calculated for MP differed significantly (P .05) were observed between SS and ND. Regarding muscle work the EMG activity of the masseter differed significantly (P < .001) between the left and right sides, with higher values for the right (chewing) side. No significant differences (P > .05) were observed for TMW and RoM under the three test conditions. Conclusions: The results confirm the biomechanical significance of structured occlusal surfaces during chewing of brittle test food by young dentate subjects.