Effect of Immersing Heat Cured Acrylic Resin Material in Avocado Seed Extract on Transversal Strength
Nova Adrian(1), IGA Ratih Utari Mayun(1), Thesya Dhyah(2)

1. Prosthodonsia Departement, Universitas Trisakti, Faculty of Dentistry, DKI Jakarta, Indonesia
2. Student, Universitas Trisakti, Faculty of Dentistry, DKI Jakarta, Indonesia

Abstract

Introduction : Heat cured acrylic resin is a material that is often used as a base for removable dentures. Heat cured acrylic resin materials are still often used because they have the advantage of being non-toxic to tissue, having good physical and aesthetic properties, being relatively cheap, being easy to manipulate and manufacture, and being able to be repaired. However, removable dentures made from heat cured acrylic resin also have disadvantages, namely that they break easily and have micro cavities which can become a place for food debris and plaque accumulation to stick, so that if they are not cleaned they will cause denture stomatitis for the user. The use of special chemicals to clean dentures has been recommended, such as a disinfectant solution by immersing the denture, however, repeated use of this disinfectant can cause physical changes in the denture base material, one of which is transverse strength. Research has been carried out on natural ingredients in dentistry, one of which is avocado seed extract, which contains phytochemicals containing antibacterial and anti-fungal substances, so it is hoped that it will be an alternative to chemical denture cleaners that do not change the physical nature of the denture material.
Purpose : The aim of this research is to determine whether there is an effect of soaking heat cured acrylic resin material in avocado seed extract on transverse strength.
Method : Making avocado seed extract with various concentrations, namely avocado seed extract with concentrations of 100%, 50%, 25%, 12.5% and 6.25%, then making 24 acrylic plates using Vertex brand resin. The samples were divided into 6 groups, one of which was the control group using distilled water, then the sample treatment for each group was soaked in avocado seed extract for 10 days at room temperature or 25oC. Every day the extract solution was replaced. After 10 days of immersion, flexural strength measurements were carried out to measure transverse strength using Torsee^s Electronic System Universal Testing Machine. The tool will press the middle part of the acrylic resin plate until a fracture occurs in the plate and the final value of the compressive strength of the machine is recorded.
Main Finding : Data testing began with a normality test with Shapiro Wilk with results p < 0.05, which means the data is not normal. Followed by the Kruskal Willis test with results p > 0.05, which means the data is not significantly different. The results showed that there was no effect of immersing acrylic resin material in avocado seed extract on changes in transverse strength
Implication : This research was used to look for alternative natural denture cleaning materials that are useful in the field of dentistry, especially prosthodontics

Keywords: Heat cured acrylic resin, natural ingredients, Avocado Seed Extract

Topic: Medicine & Health Sciences