Influence of cementation variables on fatigue of simulated two-unit cantilever resin-bonded fixed partial dentures.
OBJECTIVE
To determine the influence of various combinations of surface pretreatment and luting cement on flexural fatigue limits of two-unit CoCr cantilever resin-bonded fixed partial dentures.


METHODS
Cyclic fatigue tests were performed at 1 Hz on an ACTA fatigue tester. The staircase test method was used on CoCr beams, simulating cantilever resin-bonded fixed partial dentures, using flat ground bovine teeth as substrate. Two series of tests have been executed: (1) 10(4) cycles, and (2) 10(5) cycles. Prior to cementation, the CoCr beams were subjected to either sandblasting or Rocatec or Silicoater treatments. Three commercially available resin luting cements were used. Fatigue tests were performed 72 hours after cementation and storage in 37 degrees C tap water. Each possible combination of cement and pretreatment (n = 20) was tested.


RESULTS
One cement, UniFix, showed hardly any debondings with any of the three surface pretreatments. The other two cements, RelyX ARC and Panavia, both showed significantly better performance with Rocatec than when pretreated with sandblasting or Silicoater.
van Dalen
Andy
A
Department of Dental Materials Science, Academic Centre for Dentistry, Amsterdam, The Netherlands. a.dalen@acta.nl
Feilzer
Albert J
AJ
Kleverlaan
Cornelis J
CJ
D000537:Aluminum Oxide / Q000737:chemistry; D000818:Animals; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D002417:Cattle; D002484:Cementation / Q000379:methods*; D002858:Chromium Alloys / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D045662:Dental Etching / Q000379:methods; D019232:Dental Restoration Failure; D003779:Denture Design; D016379:Denture, Partial, Fixed, Resin-Bonded; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D018583:Pliability; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
D001896:Boron Compounds; D002858:Chromium Alloys; D003738:Dental Cements; D008689:Methacrylates; D008768:Methylmethacrylates; C438843:Panavia-Fluoro; D011109:Polymethacrylic Acids; C462240:RelyX ARC; D019279:Resin Cements; C076811:Rocatec; D012821:Silanes; D014867:Water; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C049495:Super-bond; D000537:Aluminum Oxide