Tensile bond strengths of provisional luting agents used with an implant system

Statement of problem. Retrievability of cemented implant-supported fixed pr ostheses is desirable. Retentive strengths of new provisional luting agents have not been reported. Purpose. This study compared the tensile bond strengths of 6 provisional lu ting agents when used with cemented superstructures and 1 implant system. Material and methods. Ten castings were fabricated and randomly paired with abutment specimens. Castings were cemented and the assemblies were stored in distilled water at 37 degrees C for 48 hours. Tensile bond strength nece ssary to remove each casting was measured with a 500-kg load and a crosshea d speed of 0.5 cm/min. Crown/abutment specimens were cleaned after testing, and the testing procedure was repeated for a total of 6 luting agents (n = 10). Data were analyzed with 1-way analysis of variance and Scheffe's anal ysis (alpha = .05). Results. Tensile bond strengths ranged between 1.29 and 4.08 MPa. The lowes t tensile bond strengths were found to be statistically similar between Tem p Bond and Provilink luting agents. Neo-Temp luting agent exhibited the hig hest tensile bond strength (P<.01). Conclusions. Temp Bond and Provilink luting agents exhibited the lowest mea n tensile bond strengths. Neo-Temp luting agent exhibited a tensile bond st rength more than 3 times that of Temp Bond luting agent.