Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, SP, Brazil.
J Appl Oral Sci. 2011 Nov-Dec;19(6):668-73. doi: 10.1590/s1678-77572011000600021.
Adequate denture hygiene can prevent and treat infection in edentulous patients. They are usually elderly and have difficulty for brushing their teeth.
This study evaluated the efficacy of complete denture biofilm removal using chemical (alkaline peroxide-effervescent tablets), mechanical (ultrasonic) and combined (association of the effervescent and ultrasonic) methods.
Eighty complete denture wearers participated in the experiment for 21 days. They were distributed into 4 groups (n=20): (1) Brushing with water (Control); (2) Effervescent tablets (Corega Tabs); (3) Ultrasonic device (Ultrasonic Cleaner, model 2840 D); (4) Association of effervescent tablets and ultrasonic device. All groups brushed their dentures with a specific brush (Bitufo) and water, 3 times a day, before applying their treatments. Denture biofilm was collected at baseline and after 21 days. To quantify the biofilm, the internal surfaces of the maxillary complete dentures were stained and photographed at 45º. The photographs were processed and the areas (total internal surface stained with biofilm) quantified (Image Tool 2.02). The percentage of the biofilm was calculated by the ratio between the biofilm area multiplied by 100 and the total area of the internal surface of the maxillary complete denture.
The Kruskal-Wallis test was used for comparison among groups followed by the Dunn multiple-comparison test. All tests were performed respecting a significance level of 0.05. Significant difference was found among the treatments (KW=21.18; P<0.001), the mean ranks for the treatments and results for Dunn multiple comparison test were: Control (60.9); Chemical (37.2); Mechanical (35.2) and Combined (29.1).
The experimental methods were equally effective regarding the ability to remove biofilm and were superior to the control method (brushing with water). Immersion in alkaline peroxide and ultrasonic vibration can be used as auxiliary agents for cleaning complete dentures.
适当的义齿卫生可以预防和治疗无牙患者的感染。他们通常是老年人，刷牙有困难。
本研究评估了使用化学（碱性过氧化物-泡腾片）、机械（超声）和联合（泡腾片和超声联合）方法去除全口义齿生物膜的效果。
80 名全口义齿佩戴者参与了为期 21 天的实验。他们被分为 4 组（n=20）：（1）用水刷牙（对照组）；（2）泡腾片（Corega Tabs）；（3）超声装置（Ultrasonic Cleaner，型号 2840 D）；（4）泡腾片和超声装置联合使用。所有组均使用特定的刷子（Bitufo）和水，每天刷牙 3 次，然后应用其治疗方法。在基线和 21 天后收集义齿生物膜。为了定量生物膜，将上颌全口义齿的内表面染色并在 45°拍照。对照片进行处理，并对面积（生物膜染色的总内表面面积）进行量化（Image Tool 2.02）。通过将生物膜面积乘以 100 并除以上颌全口义齿内表面总面积的比值计算生物膜的百分比。
采用 Kruskal-Wallis 检验比较组间差异，然后采用 Dunn 多重比较检验。所有检验均在 0.05 的显著性水平下进行。处理之间存在显著差异（KW=21.18；P<0.001），处理的平均秩和 Dunn 多重比较检验的结果为：对照组（60.9）；化学组（37.2）；机械组（35.2）和联合组（29.1）。
实验方法在去除生物膜方面同样有效，优于对照组（用水刷牙）。碱性过氧化物浸泡和超声振动可作为清洁全口义齿的辅助手段。
