Authors: Ke Zhao Tian Tian Wenjun Zhu Suihua Yu
Publish Date: 2011/12/20
Volume: 26, Issue: 6, Pages: 1036-1040
Abstract
To develop a new kind of denture adhesive DA then to evaluate its mechanical and chemical properties polyethylene oxide methyl cellulose sodium alginate and cellulose ether were viewed as four main factors which would affect bonding load of DA while two levels of each component were differentiated Following table L12211 twelve different formulae were designed by orthogonal design and bonding load values were recorded According to bonding load of each formula the optimized formula was selected out as this new adhesive material ComfortDA II The changing of bonding load values of ComfortDA II marinating in artificial saliva were measured and an existing product Protefix and ComfortDA were used as controls Following initial load readings samples and controls were measured from 1 to 12 hour intervals respectively ComfortDA II was diluted at 10 20 33 50 and 100 concentrations and pH values were measured at 1 2 3 4 5 6 and 8hour intervals ComfortDA II presented as a paleyellow paste Group 6 gained the highest bonding load value of 1938 42 N The mean bonding load of ComfortDA II was statistically different to ComfortDA p = 0004 and Protefix p = 0006 ComfortDA II exhibited a progressive increase in pH value over time and was slightly alkaline ComfortDA II showed significantly elevated mechanical and chemical properties comparing to ComfortDA The results also indicate that orthogonal design may be an efficacious way to develop new dental materials
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