Post on 31-Jul-2015
Removal of a fractured implant screw
Author Dr. Young-Ku Heo, DDS, MDS, PhD
Director of Global Academy of Osseointegration Seoul, Korea
Clinical case (Case presentation & Movie)
Periapical view. For a perfect guide to be screwed into the screw hole, an implant has to have at least 1mm of the screw threads on top of the fractured screw.
M2.0 perfect guide(for Φ1.2mm) was tightened to 15Ncm in the screw hole. A perfect guide positions a drill the dead center of the screw and prevents it from damaging the threads of the implant.
A Φ1.0mm reverse drill is used at 2,000rpm with copious water irrigation. Drilling direction should be in reverse. (First start with small size drill)
Using a perfect guide, a reverse drill was placed right on top of the fractured screw. Then approximately 1.0mm was gently drilled vertically down. The use of rubber stoppers is suggested for 1.0mm of depth control.