Keyf Filiz, Güngör Tayyar
Faculty of Dentistry, Department of Prosthodontics, Hacettepe University, Ankara, Turkey.
J Biomater Appl. 2003 Jul;18(1):5-14. doi: 10.1177/0885328203018001001.
Proper hygienic care of removable partial dentures is important for maintaining a healthy oral mucosa. A daily home care routine is the responsibility of the patient to maintain oral hygiene. A dentist must inform the patient about denture cleansers used for plaque control. Common denture cleansers may negatively affect the surface of alloys used to make partial dentures. The purpose of this study was to evaluate whether bleach and cleansing tablet have deleterious effects on the surface of a dental alloy used to fabricate removable partial dentures. Nineteen test specimens were prepared from CoCr dental alloy. The specimens were cast into 10 mm long x 10 mm wide x 1 mm thick. Fresh solutions made from a commercial bleach and a commercial cleansing tablet were used for each treating. Three groups (commercial denture cleansing tablet, bleach and tap water) were tested. Six specimens were immersed in 200 mL of tap water containing a single denture cleansing tablet. Two spoons of the commercial bleach was added to 200 mL of tap water. Seven specimens were treated. The control specimens were immersed in 200 mL of tap water. Six specimens were the control group. Each specimen was immersed for 30 min per day in the solution for a period of 30 days. The specimens were analyzed for reflectance with a spectrophotometer, for surface changes with a light microscope and weight which was measured with sensitive balance before and after treatment. The SPSS program was used for the statistical analysis. The Kruskal-Wallis Test and Wilcoxon Signed Ranks Test was used. No significant changes of reflectance was shown in the Kruskal-Wallis Test (p > 0.05). The Wilcoxon Signed Ranks Test was performed for comparison into groups. The difference between before and after treatment was statistically significant for the commercial denture cleansing tablet and the commercial bleach (p = 0.028) (p < 0.05). Reflectance was decreased after treatment. Within the limitations of this study, the commercial cleaning solutions had influenced the decrease of reflectance on the surface of the dental alloy. This solutions should not be limitlessly used on dentures with metal components, because they caused clinically significant reflectance changes on the surface of the alloy after 30 days.
对可摘局部义齿进行适当的卫生护理对于维持健康的口腔黏膜很重要。日常家庭护理工作由患者负责以保持口腔卫生。牙医必须告知患者用于控制牙菌斑的义齿清洁剂。常见的义齿清洁剂可能会对用于制作局部义齿的合金表面产生负面影响。本研究的目的是评估漂白剂和清洁片是否会对用于制造可摘局部义齿的牙科合金表面产生有害影响。用钴铬牙科合金制备了19个测试样本。样本被铸造成10毫米长×10毫米宽×1毫米厚。每次处理使用由市售漂白剂和市售清洁片制成的新鲜溶液。测试了三组（市售义齿清洁片、漂白剂和自来水）。六个样本浸泡在200毫升含有一片义齿清洁片的自来水中。两勺市售漂白剂加入到200毫升自来水中。七个样本进行处理。对照样本浸泡在200毫升自来水中。六个样本为对照组。每个样本每天在溶液中浸泡30分钟，持续30天。用分光光度计分析样本的反射率，用光学显微镜分析表面变化，并在处理前后用灵敏天平测量重量。使用SPSS程序进行统计分析。使用了Kruskal-Wallis检验和Wilcoxon符号秩检验。Kruskal-Wallis检验中未显示反射率有显著变化（p>0.05）。进行Wilcoxon符号秩检验以进行组间比较。市售义齿清洁片和市售漂白剂处理前后的差异具有统计学意义（p=0.028）（p<0.05）。处理后反射率降低。在本研究的局限性内，市售清洁溶液影响了牙科合金表面反射率的降低。这种溶液不应在有金属部件的义齿上无限制使用，因为30天后它们在合金表面引起了临床上显著的反射率变化。
