Roseline, S P (2022) Evaluation and Comparison of the Transverse Strength and Residual Monomer Content of Two Different Heat Cure Denture Base Resins Processed by Different Polymerization Techniques: An In Vitro study. Masters thesis, K.S.R. Institute of Dental Science and Research, Tiruchengode.
Full text not available from this repository.Abstract
BACKGROUND: Inspite of advancements in material properties of heat cure acrylic resin, fracture of denture base and allergic reactions due to release of residual monomer is encountered frequently. To improve strength and to reduce residual monomer, different polymerization methods need to be investigated. AIM AND OBJECTIVES: Aim of this study was to evaluate and compare transverse strength and residual monomer content of two different heat cured denture base resins polymerized by conventional water bath and by autoclave. METHODOLOGY: Samples were prepared with Acralyn-H conventional heat cure resin and Acralyn-H super hi-impact resin using metal dies. Samples were polymerized in water bath at 74°C for 2 hours followed by 100°C for 1 hour and in autoclave at 121°C and 210 kPa for 30 minutes at holding temperature. Transverse strength specimens were immersed in distilled water, placed in an incubator at 37°C for 48 hours and then tested for transverse strength in Universal testing machine. Specimens for residual monomer content estimation were weighed and each specimen was extracted in methanol using Soxhlet extractor and then read at 230nm in UV spectrophotometer. Concentrations of residual monomer were evaluated and weight fractions were calculated. RESULTS: The results of this study showed a statistically significant difference in transverse strength of Acralyn-H conventional heat cure resin polymerized by autoclave, whereas all other groups showed a non-significant result. CONCLUSION: Autoclave can be used as an alternative polymerization technique as it has shown similar results when compared with water bath and time required for polymerization is also reduced.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | 241911252 |
| Uncontrolled Keywords: | Autoclave, Polymerization, Residual Monomer, Polymethyl methacrylate. |
| Subjects: | DENTAL > Prosthodontics and Crown and Bridge |
| Depositing User: | Subramani R |
| Date Deposited: | 08 May 2022 15:46 |
| Last Modified: | 13 May 2022 05:41 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/19985 |
Actions (login required)
 |
View Item |
