Teeth fracture resistance in bonded amalgam restorations using different adhesive materials / 实用口腔医学杂志

ABSTRACT

Objective:To evaluate the effects of resistance of bonded amalgam restorations to fracture after treatment.Methods: Fifty healthy extracted maxillary teeth were selected,ten of them as control.The remainder were prepared a mesial occlusal distal(MOD) cavity.All of the teeth were then divided into five groups: 1st group: control;2nd group: direct restoration;3rd group: Luting;4th group: GC Fuji Ⅱ;5th group: RelyX ARC.All specimens were placed in a 37 degree centigrade humidity chamber for 72 h.The samples were thermocycled for 2 500 cycles at a temperature of 5 ℃ and 55 ℃.The samples use fatigue testing and observe by scanning electron microscope.Results:The preparation and restoration groups required significantly less force to fracture than the control group.The group with glass-ionomer cement bonding and composite resin bonding showed no significantly fracture resistance.Conclusion:Bonded amalgam restoration is a effective technique.At the same time glass-ionomer cement bonding and composite resin bonding shows no significantly fracture resistance.