The Effect of Different Beverage Solutions on the Hardness of Different Acrylic Denture Teeth

Ahmad Alubaidi

doi:10.33899/rden.2020.165385

Abstract

Aims: To determine the effect of different beverage solutions on the hardness of different acrylic denture teeth which are commercially available. Materials and Methods: Sixty samples were prepared from three brands of artificial teeth in this study. The posterior teeth of each brand were placed in auto polymerizing acrylic resin and the occlusal surfaces were ground flat, then immersed in distilled water (control), Pepsi, coffee and tea solutions for 30 days and then the hardness were tested using Vickers microhardness tester. Results: The RMH denture teeth materials showed the highest hardness than other denture teeth materials. Pepsi was more effective than tea and coffee in reducing the hardness of different acrylic teeth materials. Conclusions: Pepsi reduced the hardness of different acrylic teeth materials during the 30 days immersion. The hardness of RMH denture teeth materials was less affective by the different beverage solutions.

Highlights

Progressive wear of the occlusal surfaces, resulting in insufficient posterior tooth support, will lead to changes in the vertical and horizontal jaw relations and may cause functional and esthetic impairments.[2]. The artificial teeth should be hard enough to resist abrasive forces in the mouth and during cleaning, but should allow grinding with a dental bur, so that adjustments to the occlusion can be made by the dentist at the chairside.[3]. Currently, there are various types of commercial artificial denture teeth available, such as porcelain teeth, conventional acrylic resin teeth, and improved acrylic resin teeth, including high cross-linked acrylic resin teeth and composite resin teeth.[4]. Acrylic resin teeth and porcelain teeth are widely used in the fabrication of complete and removable dentures
In addition to filling a basic human needs, beverages form part of the culture of human society.[7,8] Solvent in the diet may chemically soften denture teeth and be a contributing factor to a greater wear.[9]. The aim of this present study is to investigate the effect of different beverage solutions on the hardness of different acrylic teeth
The posterior teeth of these three types were used, the acrylic teeth were embedded in auto polymerizing acrylic resin (Ivoclar\vivadent,Schaan, Liechtenstein) using a metallic ring with 2 cm diameter.[12]. The metallic ring was lubricated with separating medium (Dentaire,S.A.,Vevey,Suisse), and placed over a glass slab that was lubricated with separating medium, the auto polymerizing acrylic resin was placed inside the metallic ring, the artificial teeth were embedded in the auto polymerizing acrylic resin (Figure 1)

Summary

Introduction

While its hardness turns denture adjustment easier, its integrity may be damaged by brushing, mastication and immersion in chemical products.[1]. It is an advantage for the artificial teeth to be of low density, in order that they do not increase the weight of the denture unduly. Acrylic resin teeth and porcelain teeth are widely used in the fabrication of complete and removable dentures. [5] Porcelain teeth have a higher resistance and hardness and better color stability than resin teeth, they are brittle and fracture during use. Acrylic resin teeth have excellent fracture toughness, easy occlusal adjustment, and high bond strength to denture base materials, but their wear resistance has been questioned.[6]

Methods

Results

Conclusion