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effect of preheat repetition on color stability of methacrylate and silorane-based composite resins
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نویسنده
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abed kahnamouei mahdi ,gholizadeh sarah ,rikhtegaran sahand ,daneshpooy mehdi ,kimyai soodabeh ,alizadeh oskoee parnian ,rezaei yashar
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منبع
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journal of dental research dental clinics dental prospects - 2017 - دوره : 11 - شماره : 4 - صفحه:222 -228
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چکیده
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Background. the aim of this study was to investigate the effect of preheating methacrylate- and silorane-based composite resins on their color stability up to 40 times at 55‒60°c. methods. seventy-six methacrylate and silorane-based composite resin samples, with a diameter of 10 mm and a height of 2 mm, were divided into 4 groups (n=19). after the samples were prepared, their color parameters were determined using a reflective spectrophotometer. the composite resin samples were separately stored in a solution of tea for 40 consecutive days. then the samples underwent a color determination procedure again using a spectrophotometer and color changes were recorded. finally two-way anova was used to study the effect of composite temperature on its staining (p<0.05). independent-samples t-test was used to evaluate changes in conversion rates of preheated composite resin samples compared to non-heated samples at p=0.005 and p=0.029 for silorane-based and z250 composite resin samples, respectively. results. both composite resin type (p=0.014) and preheating (p<0.001) had significant effects on δe. conclusion. repeated preheating of methacrylate- and silorane-based composite resin samples, up to 55‒60°c for 40 rounds, resulted in more color changes compared with unheated composite resin samples. after storage in a solution of tea the color change rate in the composite resin samples of silorane-based was higher than the z250 composite resin samples.
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کلیدواژه
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composite resin ,preheating ,microleakage ,color stability
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آدرس
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tabriz university of medical sciences, dental and periodontal research center, department of restorative dentistry, ایران, ahvaz jundishapur university of medical sciences, department of restorative dentistry, ایران, tabriz university of medical sciences, department of restorative dentistry, ایران, tabriz university of medical sciences, department of restorative dentistry, ایران, tabriz university of medical sciences, department of restorative dentistry, ایران, tabriz university of medical sciences, department of restorative dentistry, ایران, tabriz university of medical sciences, department of restorative dentistry, ایران
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پست الکترونیکی
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rezaeiy@tbzmed.ac.ir
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Authors
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