Department of Partial and Complete Denture, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
Department of Partial and Complete Denture, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
J Prosthodont Res. 2019 Apr;63(2):245-249. doi: 10.1016/j.jpor.2018.12.005. Epub 2019 Jan 26.
To clarify the effect of denture treatment on masticatory movement in patients with complete dentures.
Forty eight patients who required new complete dentures and 20 patients who were satisfied with their original complete dentures (control: C group) participated in this study. Subjects were asked to chew a gummy jelly on their habitual chewing side. The movement of mandibular incisal point was recorded using a mandibular kinesiograph. First, average path and overlap of the movement path were displayed for the ten cycles between the fifth cycle and the fourteenth cycle. The movement path was classified into one of seven patterns and the frequency of each pattern was calculated and investigated the relationship between treatment and masticatory path pattern. Next, opening distance and masticatory width (spatial parameter) and cycle time (temporal parameter) were calculated and compared between the before treatment group (BT group) and after treatment group (AT group), and between the AT and C groups.
The BT group showed various patterns of masticatory path, whereas the majority of subjects in the AT and C groups showed path patterns that were representative of healthy dentate subjects. The opening distance and masticatory width increased, and the cycle time was shortened after wearing new complete denture, and there were no statistically significant differences between AT group and C group.
From these results it was suggested that the masticatory movement of patients with complete dentures improved greatly after wearing new denture.
明确全口义齿修复对义齿患者咀嚼运动的影响。
本研究纳入了 48 名需要新全口义齿的患者（实验组）和 20 名对原有全口义齿满意的患者（对照组）。要求受试者在习惯侧咀嚼 gummy jelly。使用下颌运动描记仪记录下颌切牙点的运动。首先，显示第五到第十四周期的十个周期之间的平均路径和运动路径的重叠。将运动路径分为七种模式之一，并计算每种模式的频率，以研究治疗与咀嚼路径模式之间的关系。接下来，计算并比较治疗前组（BT 组）和治疗后组（AT 组）以及 AT 组和 C 组之间的开口距离和咀嚼宽度（空间参数）和周期时间（时间参数）。
BT 组显示出各种咀嚼路径模式，而 AT 组和 C 组的大多数受试者显示出与健康有牙颌受试者相似的路径模式。佩戴新全口义齿后，开口距离和咀嚼宽度增加，周期时间缩短，但 AT 组与 C 组之间无统计学差异。
从这些结果可以看出，全口义齿患者佩戴新义齿后咀嚼运动得到了极大的改善。
