What is the distal stem taper angle for Anthology?

What is the distal stem taper angle for Anthology?

• A. 4 degrees
• B. 6 degrees
• C. 8 degrees
• D. 5 degrees

Answer: (B)

The distal stem taper angle describes how steeply the distal portion of the stem narrows as it extends into the bone, which affects how the implant seats, engages the canal, and transfers load. For the Anthology stem, that angle is 6 degrees. This modest taper helps achieve stable initial fixation by providing sufficient distal engagement while still allowing good proximal bone preservation and predictable seating with the system’s instrumentation. If the angle were smaller, there would be less distal engagement and potentially less rotational stability; if it were larger, there would be more distal fill and a higher risk of stress concentration at the tip or mismatch with canal geometry. The 6-degree taper is the design choice that balances these factors for this stem.

The distal stem taper angle describes how steeply the distal portion of the stem narrows as it extends into the bone, which affects how the implant seats, engages the canal, and transfers load. For the Anthology stem, that angle is 6 degrees. This modest taper helps achieve stable initial fixation by providing sufficient distal engagement while still allowing good proximal bone preservation and predictable seating with the system’s instrumentation. If the angle were smaller, there would be less distal engagement and potentially less rotational stability; if it were larger, there would be more distal fill and a higher risk of stress concentration at the tip or mismatch with canal geometry. The 6-degree taper is the design choice that balances these factors for this stem.