Oueis Hassan
Department of Pediatric Dentistry, University of Detroit Mercy, Detroit, MI, USA.
Int J Paediatr Dent. 2009 May;19(3):201-5. doi: 10.1111/j.1365-263X.2008.00965.x. Epub 2009 Jan 16.
The aim of this study was to analyse occlusal parameters and body variables to examine the factors accounting for masticatory performance of Japanese children in relation to adults.
Sixty-six children and 24 adults chewed three pieces of a colour-changeable chewing gum, separately, for 30 s, 60 s, and 90 s. The colour change was measured at 30 s using L* a* b* colour space system. Biting force, occlusal contact areas, and occlusal pressure were recorded by Dental Prescale. Number of strokes, and the height and weight of the subjects were included in the statistical analysis.
Within each sample, Student's t-test revealed significant differences among a* values at the three chewing times in which the value of a* (indicator of red) increased as the length of chewing time increased (P < 0.05). Multiple regression analysis showed that the rate of mandibular movement in preschool children has a significant impact on masticatory performance (P < 0.05). In schoolchildren, the rate of mandibular movement, biting force, and body weight were significant factors (P < 0.05). In adults, occlusal contact area, biting force, and the rate of mandibular movement were the significant factors (P < 0.05).
Factors affecting masticatory performance differ according to the developmental stage of the individual.
本研究旨在分析咬合参数和身体变量，以探究与成年人相比，影响日本儿童咀嚼性能的因素。
66名儿童和24名成年人分别咀嚼三片可变色口香糖，持续30秒、60秒和90秒。使用Lab*颜色空间系统在30秒时测量颜色变化。通过牙科预标仪记录咬合力、咬合接触面积和咬合压力。统计分析纳入了咀嚼次数以及受试者的身高和体重。
在每个样本中，学生t检验显示，在三个咀嚼时间点的a值之间存在显著差异，其中a值（红色指标）随着咀嚼时间的延长而增加（P<0.05）。多元回归分析表明，学龄前儿童的下颌运动速率对咀嚼性能有显著影响（P<0.05）。在小学生中，下颌运动速率、咬合力和体重是显著因素（P<0.05）。在成年人中，咬合接触面积、咬合力和下颌运动速率是显著因素（P<0.05）。
影响咀嚼性能的因素因个体发育阶段而异。
