Overview
The document provides detailed information on the Alteon HA Femoral Stem, a hydroxyapatite-coated prosthesis designed for primary femoral solutions in hip arthroplasty. It highlights the clinical lineage, key benefits, and design philosophy of the product.

Clinical Lineage and Key Benefits
The Alteon HA Femoral Stem is based on a clinically proven design with over 20 years of performance. It features a fully hydroxyapatite-coated surface that promotes bone ongrowth and biologic fixation. The stem design includes incremental sizing with four neck length groupings and two offsets, allowing for anatomical restoration without neck modularity. The stem grows proportionally from medial to lateral, accommodating a wide range of patient anatomies. Additionally, the overall stem length is reduced by up to 25% compared to competitors, preserving bone and supporting various surgical approaches.

Design Philosophy
The design of the Alteon HA Femoral Stem is rooted in over 25 years of clinical use. It emphasizes bone conservation and initial stability to encourage biologic fixation. The system offers a simple broach-only technique, providing flexibility for different surgical approaches.

Platform Instrumentation
The Alteon platform includes instrumentation compatible with multiple stem types, such as the Neck Preserving Stem, Tapered Wedge Stem, and Monobloc Revision Stem.

Neck Length Groupings and M/L Growth
The stem sizes are organized into four groups, with special order options for sizes 14 and 15. The scope includes standard and extended offset options, both collared and collarless, for sizes 1-15, with special orders for the largest sizes.

References
The document cites various studies and data sources, including long-term performance reviews and clinical trials, to support the efficacy and design of the Alteon HA Femoral Stem.