The effect of colored drinks on the surface hardness of composite resin.

Omar Rahawi

doi:10.33899/rden.2010.9023

Abstract

Aims: to determine the effect of colored drinks on the surface hardness of three types of composite restorations. Materials & methods: Three composite resins (a compoglass, conventional and ceramic composites) were used in this study. Transparent disc with 2mm thickness and hole of 5mm diameter were used for the preparation of composite samples, ten samples were made for each type of composite with a total of 30 samples. Four samples from each type of composite were immersed in( a cola ,tea, normal saline and coffee) respectively (normal saline as a control for the study),after that each colored drink measure amount of ph before put the samples using ph meter(Pw 9421,philips) and then each sample stored for (one week, two week and one month) inside incubator at 37° C then the samples were tested for the micro hardness with a Vickers micro hardness tester(Wolpert,Germany)with 200g load. Five micro hardness measurements were obtained on top surface of each sample on the following time period: before immersing in color drinks, after immersing each samples in cola, coffee and tea. Data were analyzed using One way analysis (ANOVA) and Duncan, a value of P≤ 0.05 was consi-dered significant .Results: The results of ANOVA showing a significant difference among all ceram-ic samples regarding all media and time when P≤ 0.05.Conclusion: it can be concluded that all conven-tional materials are susceptible to the effect of aqueous media of oral cavity and other softening drink.

Highlights

Composite resins are widely used in restorative dentistry,there are number of reason other than dental caries why the tooth may require repair or restoration they include erosion,trauma,abrasion and aesthetically defect teeth
The role of diet in the etiology of dental erosion has received the most attention paid to colored drink
Restorative filling material used in dentistry are required to have long – term durability in the oral cavity this is a complex environment where the material is in contact with saliva, a fluid that contain a variety of inorganic and organic species,together with flora complex [2]

Summary

Introduction

Composite resins are widely used in restorative dentistry ,there are number of reason other than dental caries why the tooth may require repair or restoration they include erosion ,trauma ,abrasion and aesthetically defect teeth. Restorative filling material used in dentistry are required to have long – term durability in the oral cavity this is a complex environment where the material is in contact with saliva, a fluid that contain a variety of inorganic and organic species ,together with flora complex [2]. One of the most important physical properties of restorative filling material is surface micro hardness which correlates well to compressive strength and abrasion resistance [3]. The attractiveness of tooth –colored restoration has stimulated research in this particular area of operative dentistry during recent year. Patients are increasing demanding esthetic restoration in the anterior region and for posterior teeth [4]

Objectives

Methods

Conclusion