Department of Oral Rehabilitation, Federal University of Goiás, Goiânia, Goiás, Brazil.
School of Dental Medicine, University of Bern, Bern, Switzerland.
J Oral Rehabil. 2019 Oct;46(10):903-911. doi: 10.1111/joor.12822. Epub 2019 May 30.
The aim of this study was to assess whether differences in inter-individual clinical and prosthodontic variables affect masticatory performance (MP) of edentulous subjects who received new complete dentures.
There were 204 edentulous participants who received new maxillary and mandibular complete dentures between October 2014 and March 2018 at a university clinic. MP was measured by a mixing ability test with a two-coloured chewing gum for 20 and 50 chewing cycles. The outcome variable was the degree of colour mixing of the chewed gum, expressed by the variation of hue (VOH) and measured by electronic colourimetric analysis. Explanatory variables included gender and age, quality of the dentures, classification of edentulous ridges and prognostic features, time since the insertion of the new dentures and patient-reported outcomes related to complete denture treatment. Bivariate correlation tests, multiple linear regression and a linear mixed model were used for data analysis.
Mean VOH values were 0.57 (±0.13) and 0.43 (±0.16) for 20 and 50 chewing cycles, respectively. Mixing ability was higher in females than in males for 20 (P = 0.036) and 50 (P = 0.006) chewing cycles. No effects on the patient-reported outcome measures were observed. The time since denture delivery, gender, age and Prosthodontic Diagnostic Index (PDI) score were independently associated with masticatory performance at 20 and/or 50 chewing cycles. Overall masticatory performance tested by the linear mixed-effect model confirmed that VOH value was negatively influenced by male gender, older age and shorter time since denture delivery.
Masticatory performance seems to be improved with the continuous use of newly inserted dentures and negatively influenced by advanced age.
本研究旨在评估个体临床和修复变量的差异是否会影响接受新全口义齿的无牙颌患者的咀嚼效能（MP）。
2014 年 10 月至 2018 年 3 月期间，在一所大学诊所，有 204 名无牙颌患者接受了新的上颌和下颌全口义齿。通过双色咀嚼胶进行 20 和 50 次咀嚼循环的混合能力测试来测量 MP。结果变量为咀嚼胶的颜色混合程度，用色调变化（VOH）表示，并通过电子比色分析进行测量。解释变量包括性别和年龄、义齿质量、无牙颌牙槽嵴分类和预后特征、新义齿插入后的时间以及与全口义齿治疗相关的患者报告结果。采用双变量相关检验、多元线性回归和线性混合模型进行数据分析。
20 次和 50 次咀嚼循环的平均 VOH 值分别为 0.57（±0.13）和 0.43（±0.16）。20 次（P=0.036）和 50 次（P=0.006）咀嚼循环时，女性的混合能力均高于男性。未观察到对患者报告结果测量的影响。义齿交付后的时间、性别、年龄和修复诊断指数（PDI）评分与 20 和/或 50 次咀嚼循环时的咀嚼效能独立相关。通过线性混合效应模型进行的总体咀嚼效能测试证实，VOH 值受男性性别、年龄较大和义齿交付后时间较短的负面影响。
咀嚼效能似乎随着新插入义齿的持续使用而提高，并受到年龄增长的负面影响。
