Dental Implants – Screwed Joints
Screwed Joint is one way of joining implant superstructures to the abutment. Screwed Joint functions by virtue of its components being held tightly together by the tension in the screw acting after the fashion of a spring.
Advantages
1. Retrievability
2. Control of Gap
3. Predictable Future Failure
Disadvantages
1. Mechanical Failure. It can be problematical
2. access holes
3. Contamination. It can permit ingress of material and microorganisms from the mouth
4. Angulation Problems.