What characterizes the metallic collar of root form implants?

The metallic collar of root form implants is characterized by a highly polished surface. A polished surface is advantageous because it minimizes tissue irritation and enhances the integration of the implant with surrounding bone and soft tissue. A smooth, polished collar helps to prevent plaque and bacterial accumulation, which can contribute to inflammation and implant failure.

In contrast, a rough texture is typically utilized on other parts of the implant to promote osseointegration by encouraging bone attachment. A corroded surface is undesirable and would indicate a failure of the material, potentially leading to health issues and implant failure. A porous structure is often beneficial in some implant designs to facilitate bone growth, but it is not characteristic of the metallic collar itself, which is specifically designed to be smooth and non-reactive to better interface with surrounding tissues.