Evaluvation of The Transverse Strength of Acrylic Denture Base Resins Repaired by Different Materials: An Invitro Study
Abstract
AIMS: The aim of the study undertaken was to evaluate an effective method of denture repair, which will have considerable transverse and impact strength, quick to repair and can be effectively utilized by the general practitioner.
OBJECTIVES: 1) To evaluate the transverse strength of denture base resin repaired by different methods having 45° joint surface contours and compare it with denture base acrylic resin repaired by conventional methods.
2) To find out the best material for repair.
MATERIAL AND METHODS: For the purpose of this study, Heat cure resin (DPI), Autopolymerising resins (DPI) and Glass Fibers (interling), were taken from the market. The unrepaired conventional heat cure denture base resin (DPI heat cure) plates were used as control group. .
RESULTS:
1) The mean transverse and impact strength of all the samples repaired by various methods showed significantly lower strength than control group (heat cure unrepaired samples used as control for transverse strength) 103.33MPa, although statistically significant.
2) Specimens repaired by self cure resin with glass fibers having 450 bevel joint showed the highest transverse strength.
References
1. Ibrahim M Hamouda, Mohammed M Beyari (2014). Addition of Glass Fibers and Titanium Dioxide Nanoparticles to the Acrylic Resin Denture Base Material: Comparative Study with the Conventional and High Impact Types. OHDM - March 2014;13(1):107-115.
2. Sharry JJ. “Complete denture prosthodontics” 3rd edition, McGraw-hill book company; 1974.
3. Dr. Walter Wright (1937), cited ref from, Jagger DC, Harrison A, Jandt KD. The reinforcement of dentures. J. Oral Rehab1999; 26 : 185-194.
4. Beyli MS, Fraunhofer JA. An analysis of cause of fracture of acrylic resin dentures. J. Prosthet Dent 1981; 46 : 238-41.
5. Jhon B. Farmer. Preventive prosthodontics : Maxillary denture fracture. J. Prosthet. Dent 1983; 50: 172-175.
6. Stipho HD, Stipho AS. Effectiveness and durability of repaired acrylic resin joints. J. Prosthet Dent 1987; 58 : 249-252.
7. Rached NR, Powers JM, Antoninha A and Cury DB. Repair strength of autopolymerizing, microwave and conventional heat-polymerized acrylic resins. J. Prosthet Dent 2004; 92 : 79-82.
8. Ward JE, Moon PC, Levine RA, Behrendt CL. Effect of repair surface design, repair material and processing method on the transverse strength of repaired acrylic denture resin. J. Prosthet Dent 1992; 67 : 815-20.
9. Harrison WM and Stansburry BE. The effect of joint surface contours on the transverse strength of repaired acrylic resin. J. Prosthet Dent 1970; 23 : 464-472.
10. Stipho HD. Repair of acrylic resin denture base reinforced with glass fiber. J. Prosthet Dent 1998; 80 : 546-550.
11. Amit Sharma et al. Influence of Repair Material, Surface Design and Chemical Treatment on The Transverse Strength of Repaired Denture Base - An In vitro Study. Indian Journal of Dental Sciences. October 2012 Supplementary Issue, Issue 4 (4): 23-26.
12. Dootz ER, Koran A, Craig RG. Physical property comparison of 11 soft lining materials as a function of accelerated aging. J Prosthet Dent 1993; 69:114-9.
13. Glossary of Prosthodontic Term [academy of prosthodontic 2005]
