Shear bond strength of veneer composite to cobalt-chromium alloys fabricated differently
Abstract
ABSTRACT
Objective: The purpose of this study was to assess and contrast the shear bond strength of a veneer composite resin bonded to cobalt-chromium (CoCr) dental alloys produced by different techniques.
Material-Method: Ninety cylindrical specimens (10mm in diameter, 8mm in height) made of CoCr dental alloys were prepared by casting (C), milling (M), LaserCUSING with and without annealing (CL+, CL), and direct metal laser sintering (DMLS) with and without annealing (EL+, EL). Veneer composite cylinders (5mm in diameter, 3mm in height) were built on metal specimens using a silicone jig. After storage in water for 24 hours, the specimens were assessed for bond strength with a shear force test at a crosshead speed of 0.5 mm/min. The shear bond strengths (SBSs) were statistically analyzed using the Kolmogorow-Smirnow test and Tukey-HSD multiple comparison test (α=.05).
Results: When the SBS values of the groups were compared, significant differences were found among the groups (P<.05). While statistically significant differences were found between the CL+ group (9.36∓2.62) and the M group (13.34∓2.53) (P<.05), there were no significant differences among the others (P>.05). The debonded surfaces of the specimens exhibited mostly mixed failure types.
Conclusions: The CoCr alloy fabrication technique has an effect on the SBSs between the veneer composite resin and the metal used. LaserCUSING casting, a new technology, seems to have the lowest metal-resin bond strength among all the techniques tested.
Keywords
References
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Details
Primary Language
English
Subjects
Health Care Administration
Journal Section
Research Article
Authors
Ayça Tulga
Türkiye
Publication Date
April 17, 2018
Submission Date
February 8, 2017
Acceptance Date
September 22, 2017
Published in Issue
Year 2018 Volume: 9 Number: 1