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Research Registry No |
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PLRID-00982_V1 |
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Postgraduate Research |
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local |
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Name of University |
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University Of Dental Medicine, Mandalay |
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Degree |
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Master Degree |
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University Departmental Research |
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Yes |
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Name of University |
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University of Dental Medicine Mandalay |
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Department |
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prosthodontics dentistry |
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Registration Date |
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2020-11-25 |
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Principle Investigator |
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Kyaw Zay Linn |
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Co-Investigators |
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Dr. Zaw Moe Oo |
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Title of Research |
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Effect of prepared fracture margin designs on flexural strength of repaired denture base |
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Field of Research |
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Dentistry |
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Preliminary Research Design |
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Experimental Study |
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Preliminary Research Type |
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Applied |
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Preliminary Justification |
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Denture repair in laboratory is complicated and time consuming procedure. Therefore, majority of patients desire to repair denture as fast as possible at the chair side so that they can wear denture at once after leaving the dental clinic. Despite a variety of materials and methods for denture repair, recurrent fracture of the denture base is not uncommon which may lead to annoyance for the clinician and time consuming. A satisfactory denture repair material should have adequate strength, be easily and rapidly completed and match the original color of material with its dimensional accuracy.
Among the materials suitable for chair side repair, self-cured acrylic resin is the material of choice. It is easy to manipulate and reduce processing time at reasonable cost. The strength of self-cured acrylic resin can be improved by modifying designs of fracture margins. According to previous literatures, there are conflicts to choose the best fracture margin designs among engaged bevel margin, bevel margin of 3mm gap and margin with parallel sided slots at alternate level.
The aim of the study is to determine the simplest and the best margin design among three variants. This study will help the clinician decide the better type of margin design to resist flexural strength.
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Preliminary Aim |
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To evaluate the effect of prepared fracture margin designs on flexural strength of repaired denture base |
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Preliminary Objectives |
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1. To measure flexural strength of intact specimens 2. To measure flexural strength of repaired specimens with prepared parallel sided slots at alternate level 3. To measure flexural strength of repaired specimens with prepared bevel margins of 3mm gap 4. To measure flexural strength of repaired specimens with prepared engaged bevel margins 5. To compare flexural strength among four groups of specimens 6. To evaluate location of fracture by using light microscope |
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Preliminary Sample Size |
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Pink color heat-cured PMMA specimens of (65×10×2.5) ±0.2mm , Minimum sample size of at least 25 specimens for each group will be needed for the study (Total – 100 specimens). |
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Preliminary Study Duration |
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one year |
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Preliminary Study Area |
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Prosthetics Dentistry |
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Preliminary Study Method |
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In vitro study |
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Preliminary Research Outcome |
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on going |
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Preliminary Research Finding |
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on going |
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Preliminary Progress Report |
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on going |
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Study Starting Date |
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2020-09-01 |
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IRB/PRC/ERC Approval Date |
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2020-08-25 |
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Placement of IRB/PRC/ERC |
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University of Dental Medicine,Mandalay |
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IRB/PRC/ERC Approval Letter/Document |
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25112020085228KyawZayLinn-converted-compressed.pdf |
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Pre-existing Registration ID |
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- |
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Pre-existing Name of Organization |
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- |
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Pre-existing Name of Organization Website |
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