Resin to metal bond strengths using two commercial systems.
BACKGROUND
A secure bond between resin and an alloy framework is necessary for clinical success in removable prosthodontics.


OBJECTIVE
This study compared the shear bond strength of composite to composite to metal with two commercially available chemical bonding systems: a silicoating system (Silicoater) and a nitrogenous heterocycle-acrylonitrile system (Kevloc).


METHODS
Fifty-two nickel-chromium cubes were cast and composite resin was bonded to the alloy surfaces according to manufacturer's directions. After storage at 35 degrees C for 15 days, and thermocycling at 5 degrees C and 55 degrees C for 1200 cycles, the bonds were fractured in shear on a universal testing machine.


RESULTS
Mean bond strength for the silicoated sample was 10.93 MPa and for the heterocycle-acrylnitrate system 11.44 MPa. An unpaired t test revealed no difference between the groups (p = 0.60). Visual inspection of the fracture surfaces revealed that failure was adhesive at the resin-to-metal surface in almost all the specimens.
Rothfuss
L G
LG
U.S. Army Dental Clinic, Vicenza, Italy.
Hokett
S D
SD
Hondrum
S O
SO
Elrod
C W
CW
D000181:Acrylonitrile / Q000031:analogs & derivatives; D002858:Chromium Alloys; D001840:Dental Bonding / Q000379:methods*; D019232:Dental Restoration Failure; D016379:Denture, Partial, Fixed, Resin-Bonded; D019544:Equipment Failure Analysis; D006571:Heterocyclic Compounds; D006801:Humans; D008422:Materials Testing; D012821:Silanes
D002858:Chromium Alloys; D006571:Heterocyclic Compounds; D012821:Silanes; C112072:kevloc; D000181:Acrylonitrile