Effect of universal testing machine crosshead speed on the shear bond strength and bonding failure mode of composite resin to enamel and dentin

An investigation was conducted to determine if testing machine crosshead speed influenced shear bond strength (SBS) or the failure mode of composite bonded to enamel and dentin. Composite cylinders were bonded to 50 enamel and 50 dentin surfaces and thermocycled. Groups of 10 samples were debonded a...

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Bibliographic Details
Published in:Military medicine 2000-10, Vol.165 (10), p.742-746
Main Authors: LINDEMUTH, James S, HAGGE, Mark S
Format: Article
Language:English
Subjects:
Acrylic Resins - standards
Adhesive bonding
Analysis of Variance
Bias
Biological and medical sciences
Bond strength
Bone Cements
Composite materials
Composite Resins - standards
Dental Bonding - methods
Dental Enamel
Dentin
Failure
Humans
Laboratories
Materials Testing - instrumentation
Materials Testing - methods
Medical sciences
Molar
Polymethyl Methacrylate
Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)
Shear tests
Statistics, Nonparametric
Technology. Biomaterials. Equipments. Material. Instrumentation
Teeth
Tensile Strength
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Summary:An investigation was conducted to determine if testing machine crosshead speed influenced shear bond strength (SBS) or the failure mode of composite bonded to enamel and dentin. Composite cylinders were bonded to 50 enamel and 50 dentin surfaces and thermocycled. Groups of 10 samples were debonded at speeds of 0.1, 0.5, 1.0, 5.0, and 10.0 mm/min. Data were examined with analysis of variance and post-hoc testing. Failure modes were determined using 10x magnification. With enamel, no significant differences in SBS existed, and cohesive vs. adhesive failure modes were similar for all groups. With dentin, the 0.5, 1.0, and 5.0 mm/min samples had significantly higher SBS than the 0.1 and 10.0 mm/min samples (p < 0.05). No other differences in SBS were found. Samples tested at 0.5 mm/min demonstrated strikingly better cohesive vs. adhesive results than all other groups. SBS and cohesive vs. adhesive failures achieved with dentin bonding were significantly affected by crosshead speed.
ISSN:0026-4075
1930-613X
DOI:10.1093/milmed/165.10.742