Transverse Strength Evaluation of Light Cured Resin Impregnated Fiber Glass Reinforced Complete Denture

Document Type : Original Article

Authors

1 Ass. Lecturer at Oral Removable Prosthodontics Department, Faculty of Oral and Dental Medicine, South Valley University.

2 Prof. of Oral Removable Prosthodontics Department, Faculty of Dentistry (Cairo), Azhar University (Boys).

3 Prosthetic Dental Science Department, College of Dentistry, Al-Baha University, Saudi Arabia Removable Prosthodontics Department, Faculty of Dentistry (Cairo), Azhar University (Boys). Egypt.

Abstract

Background: The transverse strength of heat-polymerized denture base resins considerably enhanced by including either metal wires or glass fibers. Moreover, the transverse strength of specimens reinforced with continuous unidirectional glass fibers was significantly higher than that of metal wire or woven fiber reinforcements. Materials and Methods: Acrylic resin specimens had divided into two groups according to the type of material tested (group I: conventional heat cured acrylic resin, group II: resin impregnated fiberglass reinforced complete denture base). Static load on the prepared specimen using universal testing machine. Three points bending apparatus used to position the specimens with 7.5 KN load on each specimen. The three-point bending apparatus consisted of two parallel stainless steel rods away from each other by 50 mm. While the 7.5 KN load was applied centrally by a 10 mm diameter cylindrical stainless steel rod with 5 mm/min speed. Results: The transverse strength values of resin impregnated fiberglass reinforced acrylic resin showed statistically significant higher values (as P < 0.05) than conventional heat cured acrylic resin. Conclusion: that Fibers critical length was a measure of minimum fiber length required for maximum stress transfer within polymer matrix. Working with bisGMA resin, the critical fiber length established for acrylics with increased values.

Keywords

Al-Azhar Journal of Dental Science
Volume 21, Issue 5 - Serial Number 5
Supplement edition
December 2018
Pages 491-495

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