Mohammed Hilal S, Singh Sumeet, Hari Prasad A, Amarnath G S, Kundapur Vinaya, Pasha Naveed, Anand M
Reader, Department of prosthodontics, M R Ambedkar Demtal college & Hospital, Bangalore, INDIA.
Post graduate student, Department of prosthodontics, M R Ambedkar Demtal college & Hospital, Bangalore, INDIA.
Int J Biomed Sci. 2016 Dec;12(4):130-142.
Chemical cleansing by denture cleansers is first choice for denture plaque control. The most common problems while using denture cleansers are hardening, porosity, odor sorption, water sorption, solubility, and colour change, bacterial and fungal growth. Chemical cleansing procedures have been found to have an effect on the physical and mechanical properties of denture liners. Thus, this study was conducted to evaluate the effect of commercially available denture cleansers on surface hardness and roughness of acrylic and silicon based denture liners at various time interval.
Two autopolymerising denture liners Kooliner (acrylic) and GC reline soft (silicon) were tested with two commercially available denture cleansers, polident and efferdent plus. Total of 120 specimens were prepared and all the specimens were divided into six groups based on the relining materials and denture cleansers used. Surface hardness and surface roughness was tested using Shore A durometer and profilometer respectively at the end of day 1, day 7, day 30 and day 90. All the specimens were stored in artificial saliva throughout the study. Cleanser solution was prepared daily by adding Polident and Efferdent plus denture cleanser tablet into 250ml of enough very warm (not hot) water. Acrylic and silicon liner groups were cleansed in a solution of denture cleanser and water for 15 minutes daily, rinsed with water and stored in artificial saliva at room temperature. The data was analyzed with one way ANOVA and independent t-test.
The acrylic soft lining showed gradual hardening and increase in surface roughness after immersion in denture cleanser and also with time. Acrylic liner material showed maximum hardness and roughness with Polident followed by Efferdent plus and water (control group). Silicone lining material showed a slight difference in hardness and roughness between the test group and control group. There was a slight increase in hardness in all the groups with time. Very slight increase in mean surface roughness of all the silicon liner groups from day 1 to day 90 was observed. A statistically significant change was noted between and within the all silicon liner groups on day 7, day 30 and day 90.
The average surface hardness and surface roughness were lower in silicon liner material than acrylic liner material. Maximum surface roughness was noted by Polident followed by Efferdent Plus and Water for both acrylic liner group and silicon liner group.
使用假牙清洁剂进行化学清洁是控制假牙菌斑的首选方法。使用假牙清洁剂时最常见的问题包括硬化、孔隙率、气味吸附、吸水性、溶解性和颜色变化、细菌和真菌生长。已发现化学清洁程序会对假牙衬垫的物理和机械性能产生影响。因此，本研究旨在评估市售假牙清洁剂在不同时间间隔对丙烯酸和硅基假牙衬垫表面硬度和粗糙度的影响。
使用两种市售假牙清洁剂Polident和Efferdent plus对两种自凝假牙衬垫Kooliner（丙烯酸）和GC reline soft（硅）进行测试。共制备了120个样本，并根据所使用的衬里材料和假牙清洁剂将所有样本分为六组。分别在第1天、第7天、第30天和第90天结束时，使用肖氏A硬度计和轮廓仪测试表面硬度和表面粗糙度。在整个研究过程中，所有样本都保存在人工唾液中。每天通过将Polident和Efferdent plus假牙清洁剂片加入250毫升足够热（不烫）的水中来制备清洁液。丙烯酸和硅衬垫组每天在假牙清洁剂和水的溶液中清洗15分钟，用水冲洗，然后在室温下保存在人工唾液中。数据采用单因素方差分析和独立t检验进行分析。
丙烯酸软衬垫在浸泡于假牙清洁剂中以及随着时间推移后显示出逐渐硬化和表面粗糙度增加。丙烯酸衬垫材料在使用Polident后硬度和粗糙度最大，其次是Efferdent plus和水（对照组）。硅酮衬垫材料在测试组和对照组之间的硬度和粗糙度存在轻微差异。所有组的硬度随时间略有增加。观察到从第1天到第90天，所有硅衬垫组的平均表面粗糙度有非常轻微的增加。在第7天、第30天和第90天，所有硅衬垫组之间以及组内均观察到有统计学意义的变化。
硅衬垫材料的平均表面硬度和表面粗糙度低于丙烯酸衬垫材料。对于丙烯酸衬垫组和硅衬垫组，Polident导致的表面粗糙度最大，其次是Efferdent Plus和水。
