Fracture resistance of pressable ceramic fused to metal custom implant abutment
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The purpose of this study was to investigate the efficacy of fabricating pressable ceramic fused to metal custom implant abutments, and to evaluate the fracture resistance of these abutments. Two groups of 10 samples each were tested. Replicated wax patterns were cast to Goldadapt ® abutments using Lodestar ® for the experimental group. IPS e.max ® press was injected around the metal column of the metal custom implant abutment. Each of these was scanned and 10 Procera ® Zirconia abutments were fabricated by Nobel Biocare for the control group. IPS e.max ® press crowns of an average dimension of the central incisor were fabricated for each experimental and control abutments (total 20 crowns). All crowns were cemented to these custom implant abutments using resin luting agent and the respective primer. The crown-abutment test specimens were fixed to titanium implant analogues and placed in a test stand at 30° angle in a Instron universal testing machine. There were a statistically significant difference in fracture load to failure between the experimental group and control group (t18=2.131, P<.005). The pressable ceramic fused to metal abutment displayed a higher fractural load to failure than zirconia abutment.