Jagger Daryll C, Al-Akhazam Lamees, Harrison Alan, Rees Jeremy S
Department of Oral and Dental Science, Division of Restorative Dentistry (Prosthodontics), Bristol Dental School and Hospital, United Kingdom.
Int J Prosthodont. 2002 Nov-Dec;15(6):549-52.
In this study, seven denture cleansers were evaluated for their mode of action of tea stain removal from Perspex acrylic resin material.
Perspex acrylic resin specimens were stained using a combination of chlorhexidine and tea solution. The specimens were also treated with saliva to form an initial pellicle layer and facilitate the uptake of the stain. The capacity for stain removal was determined by measuring the optical density of the treated specimens by using a spectrophotometer. These were then exposed, for 5 minutes, to seven denture cleansers to demonstrate the percentage stain-removal ability of each cleanser. The same procedure was applied for roughened Perspex acrylic resin specimens. Water was used as a control in the two parts of the experiment.
The products containing alkaline hypochlorite had the highest ability for removing stain from the acrylic resin material together with a bleaching effect. The results varied when the same denture cleansers were used on the roughened Perspex surface, and this was attributed to the presence of irregularities and porosities on the blocks.
Denture cleansing agents containing hypochlorite and Boots Denture Cleaning Powder (constituents not stated by the manufacturer) exhibited the ability to remove stain from the denture base materials most effectively. Irregularities and porosities present on the denture surface played a major role in reducing the activity of denture cleaning agents and hence increased stain and plaque retention.
在本研究中，对七种假牙清洁剂去除有机玻璃丙烯酸树脂材料上茶渍的作用方式进行了评估。
用洗必泰和茶溶液的混合物对有机玻璃丙烯酸树脂标本进行染色。标本还用唾液处理以形成初始的薄膜层并促进污渍的吸收。通过使用分光光度计测量处理后标本的光密度来确定污渍去除能力。然后将这些标本暴露于七种假牙清洁剂中5分钟，以展示每种清洁剂的污渍去除百分比能力。对粗糙的有机玻璃丙烯酸树脂标本采用相同的程序。在实验的两个部分中均以水作为对照。
含碱性次氯酸盐的产品去除丙烯酸树脂材料上污渍的能力最强，同时具有漂白作用。当在粗糙的有机玻璃表面使用相同的假牙清洁剂时，结果有所不同，这归因于块体上存在不规则性和孔隙。
含次氯酸盐的假牙清洁剂和博姿假牙清洁粉（制造商未说明成分）表现出最有效地去除假牙基托材料上污渍的能力。假牙表面存在的不规则性和孔隙在降低假牙清洁剂的活性方面起主要作用，因此增加了污渍和牙菌斑的滞留。
