Journal of Oral Rehabilitation · 1999 · 95 citations · 7 references
DentistryDental Materials ScienceProsthodonticsCeramic MaterialsCeramicsDental MaterialsAll-ceramic RestorationsCeramic BiomaterialsCeramic BondingCeramic RestorationsCeramic VeneersDental CeramicsBond StrengthBonding Temperature EffectsCeramic Repair MaterialsMechanical LoadingPorcelain VeneeringRepair Of Porcelain-fused-to-metal RestorationsShear Strength AnalysisThermo-mechanical Loading
Porcelain fused to metal veneering fractures cause premature failure of fixed partial prosthodontics, yet intra‑oral composite bonded porcelain repair systems can avoid replacement. The study aimed to evaluate the shear bond strength of porcelain repair systems under thermocycling and mechanical loading and compare it to the composite‑to‑metal bonding system Rocatec. Specimens of VMK‑68 ceramic fused to Co‑Cr‑Mo alloy were bonded with 20 composite samples per repair system, and shear bond strength was measured after 24 h baseline and after artificial oral loading. Z 100 Kit, Monobond S/Tetric, and Porcelain Etch maintained >12 MPa shear strength after TCML, comparable to Rocatec, whereas Silistor and All‑Bond 2 showed significant decreases, supporting medium‑term use of suitable repair systems as an alternative to new reconstruction.
Fracture of porcelain fused to metal veneering may cause premature failure of fixed partial prosthodontics. Through the use of intra‐oral composite bonded porcelain repair systems, the replacement of the prosthetic reconstruction can be avoided. The aim of this study was to evaluate the shear bond strength of porcelain repair systems currently in use and the effect of thermocycling and mechanical loading (TCML) on the adhesion of composite to ceramic surfaces in comparison with the composite to metal bonding system Rocatec ® . Specimens were fabricated by fusing the veneering ceramic VMK‐68 ® (Vita) to Co‐Cr‐Mo‐alloy base plates. Twenty cylindrically shaped composite samples in each series were bonded to the porcelain surface using porcelain repair systems currently in use. The shear bond strength of 10 samples was evaluated after 24 h (baseline) and after loading in an artificial oral environment. The repair systems Z 100 Kit ® , Monobond S/Tetric ® and Porcelain Etch ® were not impaired by TCML and exhibited a shear bond strength of greater than 12 MPa, which was comparable to the control group Rocatec®. The shear strength of the repair systems Silistor ® and All‐Bond ® 2 decreased significantly after TCML. Using the appropriate repair system, the repair of ceramic‐veneered fixed partial prosthodontics can be recommended as a medium term alternative to a new reconstruction.
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