Department of Clinical Dentistry, Green River Valley University, UNINCOR, Três Corações-MG, Brazil.
J Periodontol. 2011 Feb;82(2):243-50. doi: 10.1902/jop.2010.100178. Epub 2010 Jul 27.
The aim of the present study is to assess the impact of conventional periodontal treatment of chronic periodontitis on the perception of mastication.
The patients (n = 28; age range: 23 to 56 years, mean age: 37.9 years) were evaluated on two occasions (before and after treatment) with a 45-day interval using the Oral Impact on Daily Performance questionnaire. An electromyography system was used for the determination of activity in muscles of mastication and bite force. Masticatory performance was assessed using a test material. The median particle size of the masticated material was determined using a sieve method and the Rosin-Rammler equation. The clinical criteria were the number of teeth and probing depth, both determined by a single calibrated observer masked to the treatment phase. The data were analyzed in the pretreatment and post-treatment periods using Wilcoxon test; Spearman correlation coefficient; and two multiple linear regression models (backward stepwise procedure).
There was a significant negative correlation between the number of teeth (number of mastication units) and difficulty eating (P <0.05) before and after treatment. Probing depth had a positive relationship with the total Oral Impact on Daily Performance score before treatment (P <0.01).
The subjective perception of the impact of oral health on mastication diminished after periodontal treatment. The number of teeth had considerable importance in the perception of impact on mastication in the sample studied.
本研究旨在评估慢性牙周炎的常规牙周治疗对咀嚼感知的影响。
将 28 例患者（年龄 23 至 56 岁，平均年龄 37.9 岁）在 45 天的间隔时间内分两次（治疗前和治疗后）进行评估，使用每日口腔活动影响问卷。使用肌电图系统来确定咀嚼肌的活动和咬合力。使用测试材料评估咀嚼性能。使用筛析法和罗辛-拉姆勒方程确定咀嚼材料的中值颗粒大小。临床标准是用单个经过校准的观察者来确定牙齿数量和探诊深度，该观察者对治疗阶段进行了盲法处理。在治疗前和治疗后期间使用 Wilcoxon 检验、Spearman 相关系数和两个多元线性回归模型（逐步后退程序）分析数据。
在治疗前后，牙齿数量（咀嚼单位数量）与进食困难呈显著负相关（P<0.05）。探诊深度与治疗前总口腔活动影响每日绩效评分呈正相关（P<0.01）。
牙周治疗后，对口腔健康对咀嚼影响的主观感知减弱。在研究样本中，牙齿数量对咀嚼影响的感知具有相当重要的意义。
