Effect of refrigeration on shear bond strength of three dentin bonding systems.
OBJECTIVE
To determine whether use of dentin bonding agents directly from refrigerated storage would have adverse effects on their shear bond strength to dentin.


METHODS
Resin-based composite cylinders were bonded to dentin on the ground occlusal surfaces of 60 extracted human molars using three different dentin bonding systems at 3.0 degrees C and 23.5 degrees C. The cylinders were then debonded using an Instron testing machine in compression mode at 0.5 mm/sec. The results were interpreted with t-test and Student-Newman-Keuls post hoc analysis.


RESULTS
Scotchbond Multi-Purpose demonstrated significantly lower shear bond strengths at 23.5 degrees C (P < 0.05) than all other groups at both 3.0 degrees C and 23.5 degrees C. All-Bond 2 and Prime & Bond had higher shear bond strengths at refrigerated temperature, but the differences were insignificant in magnitude.
Hagge
M S
MS
Department of Operative Dentistry, University of the Pacific School of Dentistry, San Francisco, USA.
Lindemuth
J S
JS
Broome
J C
JC
Fox
M J
MJ
D017438:Bisphenol A-Glycidyl Methacrylate; D019245:Compressive Strength; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates; D008963:Molar; D011109:Polymethacrylic Acids; D011897:Random Allocation; D012034:Refrigeration; D019279:Resin Cements; D013718:Tensile Strength
D017220:Dentin-Bonding Agents; D008689:Methacrylates; D011109:Polymethacrylic Acids; C103500:Prime & Bond; D019279:Resin Cements; C084018:Scotchbond Multi-Purpose; C100742:All-Bond 2; D017438:Bisphenol A-Glycidyl Methacrylate