Which statement is true about polished collars in implants?

• A. They are designed to be embedded in bone
• B. They should be supracrestal
• C. They enhance implant stability
• D. They are made of titanium only

Answer: (B)

Polished collars in dental implants are specifically designed to be supracrestal, meaning they are positioned above the bone level and are intended to interface with the soft tissue around the implant. This design approach is essential for enhancing the esthetic aspects of the gingival margin and promoting healthy soft tissue management around the implant. The polished surface helps to reduce plaque accumulation and inflammation, which is conducive to better long-term clinical outcomes.

While polished collars do play a role in implant stability and can be beneficial for the surrounding bone and soft tissue, their primary characteristic is their placement above the crestal bone. This distinguishes them from other implant components that are meant to be embedded directly within the bone, thereby serving different functional purposes.

The material composition of polished collars varies, and they are often made from titanium or zirconia, so asserting that they are made of titanium only does not hold true in all cases. This broad perspective on polished collars allows for a clearer understanding of their role and is critical for clinical applications and decision-making in implant dentistry.