A Comparative Evaluation of Impact Strength, Compressive Strength, Tensile Strength, Hardness and Dimensional accuracy of Autopolymerized, Postpolymerized Microwave Exposed Autopolymerized and Heat-Cured Denture Base Resins- An in Vitro Study
Journal Title: Saudi Journal of Oral and Dental Research - Year 2018, Vol 3, Issue 5
Abstract
Abstract: Several denture based materials have been used with a wide range of applications. Several techniques have been used in recent time to improve its properties for better durability, strength and working. To compare Impact Strength, Compressive Strength, Tensile Strength, Hardness and Dimensional accuracy of autopolymerized, postpolymerized microwave exposed autopolymerized and heat-cured denture base resins. Specimens were prepared by different modes of polymerization using autopolymerization technique,microwave post-polymerization treatment of autopolymerized acrylic resin and conventional water bath technique. The specimens were then subjected to various tests to evaluate strength (Impact, compressive, Tensile) and Hardness. There is statistically significant difference was found between mean impact strength and compressive strength of autopolymerized, postpolymerized microwave exposed autopolymerized and heat-cured denture base resin. There is no statistically significant difference between mean tensile strength of autopolymerized acrylic resin and postpolymerized microwave exposed autopolymerized acrylic resin (p=1.000) but a statistically significant difference was found between mean tensile strength of autopolymerized acrylic resin and heat-cured denture base resins (p=0.001). There was a statistically significant difference between mean Rockwell Hardness Number of autopolymerized acrylic resin and postpolymerized microwave exposed autopolymerized acrylic resin (p=0.005). A statistically significant difference was also found between mean Rockwell Hardness Number of postpolymerized microwave exposed autopolymerized acrylic resin and heat-cured denture base resins (p=0.001). Similarly, there was statistically significant difference was found between mean Rockwell Hardness Number of autopolymerized acrylic resin and heat-cured denture base resins (p=0.03). Comparison of mean linear dimensional change between autopolymerized and postpolymerized microwave exposed autopolymerized denture base resins showed no statistically significant difference in the mean dimensional change between the autopolymerized and postpolymerized microwave exposed autopolymerized denture base resins (p=0.051). Heat-cured acrylic resin exhibited the maximum values for Impact strength, Compressive Strength, Tensile Strength, Hardness and Dimensional Accuracy and Impact Strength of autopolymerized acylic resin improved after microwave postpolymerization treatment. Whereas, Hardness is decreased and Dimensional accuracy remained unaffected after the microwave postpolymerization treatment of autopolymerized acrylic resin. Keywords: Autopolymerized resins, postpolymerized resins, heat-cured denture base resins.
Authors and Affiliations
Rachna Maheshwari, Anuj Singh Parihar
Keywords
Related Articles
- EP ID EP400324
- DOI -
- Views 45
- Downloads 0
Healing Potential of Different Scaffolds: A Comparative Clinical Study
Abstract: PRF along with various additives like Bone graft (BG) and Mineral Trioxide Aggregate (MTA) enhances periapical healing. This comparative clinical study was taken up to evaluate the periapical healing potential...
Conventional Multivisit Calcium Hydroxide Apexification with Rare ApexogenesisLike Outcome and Novel Single Visit MTA Apexification Followed by Root Reinforcement with Fiber Post: Two Case Reports
Abstract: Completion of root development takes around 3 years after eruption of permanent teeth. Any pulpal injury in this period can lead to necrosis of pulp. Pulp necrosis of immature permanent teeth may impair root de...
Role and Recognition of Dentist as a Preventive Oncologist
Abstract:Oral cancer ranks in the top three of all cancers in India, which accounts for over thirty percent of all cancers reported in the Country and oral cancer control is quickly becoming a global health priority [1]....
Dentin Bonding Performance and Nanoleakage Properties of Universal Adhesives in Different Etching Modes
Abstract: The aim of this study was to compare the microtensile bond strengths (µTBS) and nanoleakage (NL) of four universal adhesives (UAs) applied in two different etching modes, self-etch (se) or etch-and-rinse (er)....
Salivary Alkaline Phosphatase and Calcium – Diagnostic Marker for Bone Resorptionin Post-Menopausal Women
Abstract: Alkaline Phosphatase comprises a group of enzymes that catalyze the hydrolysis of phosphate esters in an alkaline environment. This enzyme plays an important role in the bone metabolism. Alkaline Phosphatase ac...