Inamochi Yuka, Fueki Kenji, Yoshida-Kohno Eiko, Hayashi Yoko, Wakabayashi Noriyuki
Department of Removable Partial Prosthodontics, Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
J Oral Rehabil. 2021 Jul;48(7):809-816. doi: 10.1111/joor.13169. Epub 2021 Mar 29.
The existing masticatory performance (MP) tests cannot comprehensively evaluate objective masticatory function.
We aimed to examine the construct validity and responsiveness and determine the clinically minimum important difference (MID) and related factors of a newly developed MP scale to integrate food biting, comminution and mixing ability in patients with removable partial dentures (RPDs).
Masticatory performance tests using gummy jelly, peanuts and colour-changeable gum were performed before and 3 months after RPD treatment in 248 partially dentate patients. A 10-point ordinal subscale was created for each MP test based on the distributions of MP values, and the three subscales were integrated into a single scale (iMP scale). We analysed the correlations between MP values and iMP scores and determined the effect size for RPD treatments and the MID on the basis of patient perception of chewing ability.
iMP scores exhibited moderate correlations with the three MP values (|ρ| = 0.73-0.79, p < .001) and with the change scores (|ρ| =0.61-0.64, p < .001). The mean iMP score significantly increased after RPD treatment (p < .001), and the effect size was 0.35. Of the 248 patients, 55 (22%) reported a slight improvement in chewing ability with a mean iMP score change of 2.1 points. Sex and the number of missing teeth were significantly associated with iMP scores (p < .05).
The iMP scale comprehensively evaluated objective masticatory function, including food biting, comminution and mixing ability in RPD wearers, and an increase of two points on the iMP scale was considered to be the MID in RPD treatments.
现有的咀嚼性能（MP）测试无法全面评估客观咀嚼功能。
我们旨在检验一种新开发的MP量表的结构效度和反应度，确定可摘局部义齿（RPD）患者中整合食物咬切、粉碎和混合能力的临床最小重要差异（MID）及相关因素。
对248例部分牙列缺损患者在RPD治疗前及治疗后3个月进行使用软糖、花生和变色口香糖的咀嚼性能测试。基于MP值的分布为每个MP测试创建一个10分的有序子量表，将这三个子量表整合为一个单一量表（iMP量表）。我们分析了MP值与iMP分数之间的相关性，并根据患者对咀嚼能力的感知确定RPD治疗的效应大小和MID。
iMP分数与三个MP值呈中度相关（|ρ| = 0.73 - 0.79，p <.001），与变化分数也呈中度相关（|ρ| = 0.61 - 0.64，p <.001）。RPD治疗后iMP平均分数显著增加（p <.001），效应大小为0.35。在248例患者中，55例（22%）报告咀嚼能力略有改善，iMP平均分数变化为2.1分。性别和缺失牙数量与iMP分数显著相关（p <.05）。
iMP量表全面评估了RPD佩戴者的客观咀嚼功能，包括食物咬切、粉碎和混合能力，iMP量表增加2分被认为是RPD治疗中的MID。
