Objective: The aim of this study was to investigate the effect of the methods used to fill the screw access channels of abutments on the removal force of a final restoration cemented with Temp Bond. Methods: Four fifteen degree Angled Esthetic abutments (Branemark System) were used in the test. The screw access channels of the abutments were either (i) fully filled with a vinyl polysiloxane impression material - Memosil (Heraeus Kulzer), (ii) partially filled with Memosil or (iii) had lower portion filled with Memosil and the top portion with composite (XRV Herculite, Kerr). A casting with an attachment to allow removal was constructed for the abutments. The tensile force required to separate the cemented casting from the abutments were measured in an Instron Universal testing machine after storage in distilled water at thirty-seven degress celcius for 24 hours. Results: The mean peak force was significantly reduced with abutment screw channels fully filled with Memosil compared to those partially filled with Memosil (p<0.01) or fully filled with composite (p<0.001) whereas there was no significant difference between the latter two. Conclusion: Filling methods of screw access channel on implant restorations are a significant factor affecting the removal forces of castings cemented with Temp Bond.

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