Indian Journal of Dental Research

ORIGINAL RESEARCH
Year
: 2015  |  Volume : 26  |  Issue : 5  |  Page : 514--519

Comparative evaluation of tensile bond strength of silicone-based denture liners after thermocycling and surface treatment


Harsimran Kaur1, Kusum Datta2 
1 Department of Prosthodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
2 Punjab Government Dental College and Hospital, Amritsar, Punjab, India

Correspondence Address:
Harsimran Kaur
Department of Prosthodontics, Maulana Azad Institute of Dental Sciences, New Delhi
India

Purpose: To examine, evaluate, and compare the tensile bond strength of two silicone-based liners; one autopolymerizing and one heat cured, when treated with different chemical etchants to improve their adhesion with denture base resin. Materials and Methods: Hundred and sixty test specimens of heat-cured polymethyl methacrylate (PMMA) were fabricated; out of which 80 specimens were tested for tensile bond strength after bonding it to autopolymerizing resilient liner (Ufigel P) and rest 80 to heat-cured resilient liner (Molloplast B). Each main group was further divided into four subgroups of 20 specimens each, one to act as a control and three were subjected to surface treatment with different chemical etchants namely dichloromethane, MMA monomer, and chloroform. The two silicone-based denture liners were processed between 2 PMMA specimens (10 mm × 10 mm × 40 mm) in the space provided by a spacer of 3 mm, thermocycled (5-55°C) for 500 cycles, and then their tensile strength measurements were done in the universal testing machine. Results: One-way ANOVA technique showed a highly significant difference in the mean tensile bond strength values for all the groups. The Student«SQ»s t-test computed values of statistics for the compared groups were greater than the critical values both at 5% and at 1% levels. Conclusion: Surface treatment of denture base resin with chemical etchants prior to the application of silicone-based liner (Ufigel P and Molloplast-B) increased the tensile bond strength. The increase was the highest with specimens subjected to 180 s of MMA surface treatment and the lowest with control group specimens.


How to cite this article:
Kaur H, Datta K. Comparative evaluation of tensile bond strength of silicone-based denture liners after thermocycling and surface treatment .Indian J Dent Res 2015;26:514-519


How to cite this URL:
Kaur H, Datta K. Comparative evaluation of tensile bond strength of silicone-based denture liners after thermocycling and surface treatment . Indian J Dent Res [serial online] 2015 [cited 2020 Oct 20 ];26:514-519
Available from: https://www.ijdr.in/article.asp?issn=0970-9290;year=2015;volume=26;issue=5;spage=514;epage=519;aulast=Kaur;type=0