What features did the external hex implant system come with in 1997?

• A. Single piece implant only
• B. Implant with a surface design optimized for D1, D2, or D3 bone
• C. Fully integrated abutment system
• D. Titanium screws only

Answer: (B)

The choice regarding an implant with a surface design optimized for various bone types, including D1, D2, or D3 bone, highlights a critical advancement in implant design that began to be emphasized in the late 1990s. The external hex implant system introduced in 1997 featured a surface treatment that allowed for better osseointegration depending on the density of the surrounding bone.

Bone classification is essential, as D1, D2, and D3 refer to different bone qualities seen in patients, with D1 being dense cortical bone and D3 being lighter, more trabecular bone. By optimizing the surface design for these different types, the implant system could improve the initial stability and long-term success of the implants when placed in varying bone conditions. This adaptability reflects advancements in implant technology aimed at providing better outcomes based on individual patient needs.

Other options do not encapsulate the innovative features of the external hex implant system as effectively. For example, a single-piece implant may have existed, but it does not represent the comprehensive design approach for varied bone types. A fully integrated abutment system, while significant, is not specifically distinctive to the 1997 external hex implants. Similarly, titanium screws being a component doesn't capture the