What is the main function of a dental implant 'screw'?

The primary function of a dental implant screw is to provide retention and stability by anchoring the implant securely within the jawbone. This screw, often made of titanium or other biocompatible materials, is designed to integrate with the bone through a process called osseointegration. This integration is crucial for ensuring that the implant remains stable under the forces of chewing and biting, thereby making it a reliable foundation for the restoration, whether it be a crown or a bridge.

When the screw is properly placed, it becomes a strong anchor that allows the artificial tooth to function much like a natural tooth. Its design and function are specifically tailored to support the load and stress exerted during oral activities, which is why it is central to the success of dental implants. The other options, while they may relate to aspects of the overall implant treatment process, do not capture the fundamental role of the screw in providing structural integrity and support. Thus, option C accurately reflects the primary purpose of the implant screw in dental practice.