What feature is important for the primary stability of tapered pro conical implants?

• A. Shorter threads
• B. Deeper buttress threads
• C. Surface coating
• D. Cam connections

Answer: (B)

The feature that is crucial for the primary stability of tapered pro conical implants is the use of deeper buttress threads. Tapered implants are designed to be installed into bone, and their conical shape allows them to engage with the cortical and cancellous bone effectively. The deeper buttress threads enhance the implant's grip within the bone, a key factor that helps prevent micro-movements immediately after placement. This stability is essential, particularly during the healing phase, to allow for proper osseointegration, where the bone grows and fuses around the implant.

Deeper threads provide a larger surface area for contact with the bone and improve the load distribution across the implant. This design feature allows for better initial stability by ensuring that the implant does not shift or move, which is critical for the success of dental implant procedures. As a result, deeper buttress threads play a significant role in achieving the desired primary stability necessary for the immediate loading protocols that some dental practices may employ. The other features like surface coating, cam connections, and shorter threads may contribute to the overall performance of the implant but do not specifically address the immediate mechanical stability required at the time of implantation.