What was the initial height of the polished collar on external hex implants?

• A. 0.3 mm
• B. 0.5 mm
• C. 0.7 mm
• D. 1.0 mm

Answer: (B)

The initial height of the polished collar on external hex implants was established at 0.5 mm. The significance of this height is linked to the design's influence on biointegration, tissue response, and long-term stability of the implant. A polished collar, typically found just above the threaded portion of the implant, is critical for minimizing soft tissue irritation and promoting better healing outcomes. The chosen height of 0.5 mm has been shown to provide an effective balance between enabling proper soft tissue attachment and ensuring that the collar does not interfere with the osseointegration of the implant into the bone. This design consideration is essential for the overall success of dental implants, as it aids in creating an optimal environment for healing following placement.