A Study to Evaluate and Compare the Shear Bond Strength of Resilient Liners with Heat Cure Denture Base Resins, with and without the Effect of Saliva: An in vitro Study
K Srinivas Reddy, N Venugopal Rao, C Satyanageshwar Rao, S Sreedhar Reddy, G Maruthi Prasad, Madhukeshwara S Naik
Citation Information :
Reddy KS, Rao NV, Rao CS, Reddy SS, Prasad GM, Naik MS. A Study to Evaluate and Compare the Shear Bond Strength of Resilient Liners with Heat Cure Denture Base Resins, with and without the Effect of Saliva: An in vitro Study. J Contemp Dent Pract 2012; 13 (3):394-400.
To evaluate and compare the shear bond strength of resilient liners with heat cure denture base resins in the presence or absence of saliva.
Materials and methods
Two commercially available heat polymerized acrylics and three commercially available denture liners were immersed in artificial saliva for 7 days and 14 days, respectively. A total of 180 (Acralyn-H, No.90 and Lucitone - 199, No.90) specimens were prepared. Total of 90 overlapping joint specimens were prepared, 45 of them using Acralyn H (AGroup) and rest 45 using Lucitone-199 (L-Group). The specimens were tested for flexural strength with a 3-point bending test on an Instron universal testing machine. The results were analyzed with a one-way analysis of variance (ANOVA).
Results
The mean difference in shear bond strength (SBS) at different time intervals was found to be statistically significant (p < 0.001). Lucitone-199 recorded a significantly higher mean SBS compared to Acralyn H (p < 0.001). Further, significant differences between GC and Densply, GC and Aswin liners, and between Dentsply and Aswin were noted (p < 0.001). Difference between baseline and 7 days time interval, as well as, between baseline and 14 days time interval with respect to the mean SBS of these materials were significant (p < 0.001). Also, the mean difference in SBS between 7 days time interval and 14 days time interval was statistically significant (p < 0.001). Among the three different liners, GC yielded a higher mean SBS compared to Aswin and Dentsply at all the three time intervals. The mean SBS recorded in Dentsply and Aswin was almost same at 14 days time interval, but at baseline and 7 days, it was higher in Aswin compared to Dentsply.
Conclusion
Lucitone-199 recorded a higher mean SBS compared to Acralyn H. As the time interval increases, the mean SBS recorded in both the denture base materials decrease. Among the three different liners, GC yields a higher mean SBS compared to Aswin and Dentsply at all the three time intervals.
Clinical significance
The most common reason for failures of resilient linings in removable dentures is the separation of these linings from the denture base. Therefore, poor adhesive bond properties are one of the serious defects of the material in clinical practice.
How to cite this article
Rao CS, Reddy SS, Prasad GM, Reddy KS, Rao NV, Naik MS. A Study to Evaluate and Compare the Shear Bond Strength of Resilient Liners with Heat Cure Denture Base Resins, with and without the Effect of Saliva: An in vitro Study. J Contemp Dent Pract 2012;13(3):394-400.
Properties of resilient denture liners. J Am Dent Assoc 1961;63:382-90.
Evaluation of indirect resilient liners for dentures: Laboratory and clinical tests. J Am Dent Assoc 1965;70:344-53.
Soft lining materials. Their absorption of and solubility in artificial saliva. Br Dent 1968;91-94.
Shear bond strength of visible light cured resin relative to heat cured resin. Dent materials Sept 1989;5:314-18.
Soft lining materials in Prosthetic dentistry. Int J Prosthodont 1990;3:477-83.
The bond strength of a visible light cured reline resion to acrylic resin denture base material. J Prosthet Dent 1990;63:485-87.
Bond strength and rupture properties of some soft denture liners. J Oral Rehabil [serial online] 1992;19(2):151-60.
Craig. Comparison of bond strength of six soft denture liners to denture base resin. J Prosthet Dent 1992;68:368-71.
Adhesion properties of resilient lining materials bonded to light cured denture resins. J Prosthet dent 1992;68:854-58.
Physical property comparison of 11 soft denture lining materials as a function of accelerated aging. J Prosthet Dent 1993;69:114-19.
Hilton. A Comparison of bond strengths among chairside hard reline materials. J Prosthet Dent 1993;70:126-31.
Comparison of tensile and peel bond strength of resilient liners. J Prosthet Dent 1994;71:525-31.
Vaidyanathan. Bond strength of permanent soft denture liners bonded to the denture base. J Prosthet Dent 1995;74:595-601.
Al-Athel, Robert Jagger. Effect of test method on the bond strength of a silicone resilient denture lining material. J Prosthet Dent 1996;76:535-40.
The effect of surface machining on heat cured acrylic resin and two soft denture base materials: A scanning electron microscope and confocal microscopic study. J Prosthet Dent 1997;77:200-08.
Mechaical properties of an experimental denture soft lining material. J of Dentistru 1999;27:197-202.
Bond strength and failure analysis of lining materials to denture resin. Dent Mater 1999;15:211-18.
Strength of Relined Denture base polymers subjected long-term water immersion. Int J Prosthodont 2000;13:205-08.
Shear bond strength of denture reline polymers to denture base polymers. Int J Prosthodont 2001;14:271-75.
Assessment of shear bond Strength Between three denture reline materials and a denture base acrylic resin. Int J Prosthodont 2001;14:531-35.
Jagger Richard W. Vowles. Some Variables Influencing the bond strength between PMMA and silicone denture lining material. Int J Prosthodont 2002;15:55-58.
Effect of thermocycling on bond strength and elasticity of 4 long-term soft denture liners. J Prosthet Dent 2002;88:518-21.
Shear bond strength of microwaveable acrylic resin for denture repair. J Oral Rehb 2004;31:798-802.
Effect of water sorption and solubility of soft liners in distilled water and artificial saliva: An in vitro study. J Indian Prosthodont Soc 2004;4:51-53.
Effect of surface treatment on the bonding of an autopolymerizing soft denture liner to a denture base resin. Int J Prosthodont 2004;17:297-301.
Comparison of tensile bond strength of resilient soft liners to denture base resins. J Indian Prosthodont Soc 2005;5:86-88.
The effect of chemical surface treatments of different denture base resins on the shear bond strength of denture repair. J Prosthet Dent 2005;94:259-66.
Bond strength of heard chairside reline resins to a rapid polymerizing denture base resin before and after thermal cycling. J Appl Oral Sci 2006;14(6):436-42.
The evaluation of micro leakage and bond strength of a silicone based resilient liner following denture base surface pretreatment. J Prosthet Dent 2006;95:143-51.
Physical properties of a new denture lining material containing a fluoralkly methcrylate polymer. J Prosthet Dent 2006;96:53-58.
The effect of water immersion on the shear bond strength between chairside reline and denture base acrylic resins. J Prosthet Dent 2007;16:255-62.
The effect of chemical and mechanical treatment of the denture base resin surface on the shear bond strength of denture repairs. Rev Clin Pesq Odontol 2009;5(1):11-17.
Applied dental materials (7th ed) 1990;111-14.
Dental materials and their clinical applications. 1998;June 25th.
Materials in dentistry principles and applications. (2nd ed) 2001.
