European Journal of Prosthodontics and Restorative Dentistry

Effect of Screw Hole Filling on Retention of Implant Crowns

Effect of Screw Hole Filling on Retention of Implant Crowns

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Cover Date

December 2005

Print ISSN

0965-7452

Electronic ISSN

2396-8893

Vol

13

Issue

4

Abstract

The screw access channels of 15o angled Esthetic Abutments (Brånemark System®) were either (a) completely filled with a vinyl polysiloxane impression material (Memosil), (b) partially filled with Memosil or (c) had lower portion filled with Memosil and the remainder with composite resin. The force required to remove a temporarily cemented restoration was measured. The removal force was significantly reduced with the channel completely filled with Memosil compared to those partially filled with Memosil (p<0.01) or with composite resin placed over Memosil (p<0.01). The method selected to fill the screw access channel of an implant abutment can be a significant factor affecting retention of a cemented restoration.
KEY WORDS: Implant abutment, Screw hole filling, Retention