|
Research Registry No |
: |
PLRID-00976_V1 |
| |
|
Postgraduate Research |
: |
local |
| |
|
Name of University |
: |
University Of Dental Medicine, Mandalay |
| |
|
Degree |
: |
B.D.s. |
| |
|
University Departmental Research |
: |
Yes |
| |
|
Name of University |
: |
University of Dental Medicine, Mandalay |
| |
|
Department |
: |
Department of Prosthodontics |
| |
|
Registration Date |
: |
2020-11-25 |
| |
|
Principle Investigator |
: |
Myint Naing |
| |
|
Co-Investigators |
: |
Dr. Aung Win |
| |
|
Title of Research |
: |
Comparison on flexural strength between two types of heat polymerized denture base resin (PMMA) processed by injection molding and compression molding techniques |
| |
|
Field of Research |
: |
Dentistry |
| |
|
|
Preliminary Research Design |
: |
Experimental Study |
| |
|
Preliminary Research Type |
: |
Applied |
| |
|
Preliminary Justification |
: |
A high flexural strength is essential because the uneven force distribution of the denture base will endure under load and leads to irregular alveolar ridge resorption. The denture base should be able to resist plastic deformation and fatigue resistance under repeated loads. Flexural fatigue caused by repeated flexure over a period of time results in the midline fracture of a denture.
Conventional acrylic resin denture base polymer does not fulfill all the requirements in terms of optimal mechanical properties due to its brittle nature. The recently introduced heat cured denture base material, Yamahachi Basis HI, has advantages such as high impact resistant, non-creeping, sufficient working time and excellent temperature stability, claimed by the manufacturer.
In this study, two types of material will be used. Material one is conventional heat cured PMMA (Ashvin) and material two is high impact PMMA (Yamahachi Basis HI). Both of these materials are commonly used in Myanmar. Dimensional changes, spherical formation, and higher polymerization shrinkage are significant disadvantages of compression molding technique. Flexural strength is one of the major determinants of the mechanical properties of acrylic resin and is affected by the polymerization technique used.
The aim of this study is to evaluate and compare the technique and material for superior physical properties, flexural strength of denture bases. If the patients use the dentures processed by injection molding technique, there will be greater fracture resistance than the dentures processed by conventional compression molding technique. Moreover, the dentures processed with high impact PMMA, Yamahachi Basis Hi will also have superior physical properties than the dentures processed with conventionally used PMMA, Ashvin.
|
| |
|
Preliminary Aim |
: |
To compare the flexural strength of two types of heat polymerized denture base resin (PMMA) processed by injection molding and compression molding techniques. |
| |
|
Preliminary Objectives |
: |
1. To measure the flexural strength of Ashvin processed by compression molding and injection molding techniques by using Universal testing machine 2. To measure the flexural strength of Yamahachi processed by compression molding and injection molding techniques by using Universal testing machine 3. To compare the flexural strength of Ashvin processed by compression molding and injection molding techniques 4. To compare the flexural strength of Yamahachi processed by compression molding and injection molding techniques 5. To compare the flexural strength of Ashvin and Yamahachi processed by compression molding technique 6. To compare the flexural strength of Ashvin and Yamahachi processed by injection molding technique |
| |
|
Preliminary Sample Size |
: |
132 |
| |
|
Preliminary Study Duration |
: |
One year and eight months (January, 2020 to August 2021) |
| |
|
Preliminary Study Area |
: |
University of Dental Medicine, Mandalay. |
| |
|
Preliminary Study Method |
: |
In Vitro study |
| |
|
Preliminary Research Outcome |
: |
Ongoing |
| |
|
Preliminary Research Finding |
: |
ongoing |
| |
|
Preliminary Progress Report |
: |
Ongoing |
| |
|
Study Starting Date |
: |
2020-08-27 |
|
|
IRB/PRC/ERC Approval Date |
: |
2020-08-25 |
| |
|
Placement of IRB/PRC/ERC |
: |
University of Dental Medicine, Mandalay. |
| |
|
IRB/PRC/ERC Approval Letter/Document |
: |
25112020054247IMG_20200918_0001.pdf |
| |
|
Pre-existing Registration ID |
: |
- |
| |
|
Pre-existing Name of Organization |
: |
- |
| |
|
Pre-existing Name of Organization Website |
: |
- |
