PURPOSE: This in vitro study evaluated the effect of biofilms on abutment torque loss and wear of implant internal connection surfaces. MATERIALS AND METHODS: Morse taper abutments were torqued to corresponding implants and then the implant-abutment assemblies were immersed in a biofilm medium for 72 hours. After detorque evaluation, the abutments were removed and the inner implant surfaces were observed via scanning electron microscopy and profilometry. RESULTS: The removal torque values and the implant damaged areas decreased after contact with biofilms. CONCLUSION: The lubricating effect of biofilms decreased the friction between contacting surfaces, negatively affecting the mechanical integrity of the implant-abutment connection.
PURPOSE: This in vitro study evaluated the effect of biofilms on abutment torque loss and wear of implant internal connection surfaces. MATERIALS AND METHODS: Morse taper abutments were torqued to corresponding implants and then the implant-abutment assemblies were immersed in a biofilm medium for 72 hours. After detorque evaluation, the abutments were removed and the inner implant surfaces were observed via scanning electron microscopy and profilometry. RESULTS: The removal torque values and the implant damaged areas decreased after contact with biofilms. CONCLUSION: The lubricating effect of biofilms decreased the friction between contacting surfaces, negatively affecting the mechanical integrity of the implant-abutment connection.
Authors: Abraão M Prado; Jorge Pereira; Filipe S Silva; Bruno Henriques; Rubens M Nascimento; Cesar A M Benfatti; José López-López; Júlio C M Souza Journal: J Mater Sci Mater Med Date: 2017-03-20 Impact factor: 3.896