Association between masticatory performance using a colour-changeable chewing gum and jaw movement
Association between masticatory performance using a colour-changeable chewing gum and jaw movement
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DOI：
10.1111/j.1365-2842.2011.02204.x
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发表时间：
2011-08-01
影响因子：
2.9
通讯作者：
Sasaki, Y.
中科院分区：
文献类型：
--
作者：
Komagamine, Y.;Kanazawa, M.;Sasaki, Y.
本研究的目的是探讨咀嚼性能之间的关系，确定使用变色口香糖和下颌运动。受试者包括45名完全齿状成年人（23名男性，22名女性;平均年龄，28.1岁）。将口香糖咀嚼指定次数的咀嚼冲程（20、40、60、80、120或160冲程），而不需要任何关于咀嚼侧的说明。使用色度计测量咀嚼过的口香糖的L*、a* 和B* 值（CIE-L*a*B* 颜色系统），然后根据公式计算每一次咀嚼行程的CIE-L*a*B* 颜色空间（DE）中两种颜色之间的差异。使用DE获得每名受试者20、40、60、80、120和160次中风的咀嚼性能指数（Δ E60）。下颌运动记录使用光电系统与六个自由度。每个周期计算12个下颌运动参数，包括幅度、持续时间、速度和角度，并分别计算10个周期（从周期11到20）的平均值。逐步多元回归分析确定最大闭合速度和闭合角度作为预测因子，占DE 60变化的18%。这些结果表明，较低的角度接近牙尖吻合和更快的速度在关闭期间与变色口香糖的颜色变化。
The purpose of this study was to investigate the relationship between masticatory performance as determined using a colour-changeable chewing gum and mandibular movements. Subjects comprised 45 fully dentate adults (23 men, 22 women; mean age, 28.1 years). The gum was chewed for a specified number of chewing strokes (20, 40, 60, 80, 120 or 160 strokes) without any instructions as to chewing side. A colourimeter was used to measure L*, a* and b* values (CIE-L*a*b* colour system) for the chewed gum, then the difference between two colours in the CIE-L*a*b* colour space (DE) for each number of chewing strokes was calculated according to a formula. Index of masticatory performance (Delta E60) for each subject was obtained using DE for 20, 40, 60, 80, 120 and 160 strokes. Mandibular movements were recorded using an opto-electric system with six degrees of freedom. Twelve parameters of mandibular movements relating to amplitude, duration, velocity and angle were computed for each cycle, and mean values for 10 cycles (from cycle 11 to 20) were calculated separately. Stepwise multiple regression analysis identified maximum closing velocity and closing angle as predictors accounting for 18% of the variation in DE60. These results suggest that lower angles of approach to intercuspation and faster speed during closing duration are associated with colour changes in the colour-changeable chewing gum.