Management of a Fractured Implant Abutment Screw

Figure 1. The fractured abutment screw is inside the cemented abutment. Figure 2. The side cutting blades are removed with a stone, leaving the end cutting blades intact. Figure 3. The festooned burr is turned atop the screw fragment in the fixture to rotate it out of the fixture, taking care not to scar the internal fixture walls. Figure 4. The fragment is removed with the festooned #557 burr rotating counterclockwise and then with a #33 1/3 burr rotating clockwise against the fragment side.

Figure 5. The crown containing the cemented abutment is placed in a porcelain oven. Figure 6. The temperature is raised to 1000°C at 100°C per minute and then held for 20 minutes. This causes the cement to turn to ash. Figure 7. The abutment is then easily removed from the crown.