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Published on: February 11, 2016
Effect of Thermocycling on Shear Bond Strength of PEEK-A Comparative Study of Resin Luting Cements: An In-Vitro Study
Nikitha1, Yekula Thapaswini1, Nukalamarri O B P Chary2
1Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India.
Introduction:
Thermocycling is an in-vitro process; it may affect the bonding strength between tooth and resin which is depending upon the adhesive system.
Aim And Objectives:
To evaluate and compare the thermocycling effect on shear bond strength of RelyX Unicem and G-CEM Linkace to polyether ether ketone (PEEK) surface.
Materials And Methods:
A total of 40 PEEK disk-shaped specimens were fabricated with dimensions of 10 × 3 mm and randomly allocated into two groups. Group A was cemented with Rely X Unicem material and Group B was cemented with G-CEM Linkace. About 10 specimens from each group were thermocycled 500 times at 5°C and 55°C. By applying force at the speed of 1 mm/min using a universal testing machine, shear bond strength was measured.
Results:
The mean bond strength was compared using paired t test. There was a significant difference even before and after thermocycling.
Conclusion:
In this experiment, Shear bond strength (SBS) of G-CEM Linkace showed more even before and after thermocycling when compared to RelyX. Also bond strengths of two cements decreased after thermocycling.
