Design Rationale and Early Clinical / Surgical Observations with a Short Curved Tissue Sparing Hip Implant “The Apex ARC™ Stem”


  • Timothy McTighe, Dr. H.S. (hc)
  • Declan Brazil, PhD



Architectural changes  occurring in the proximal  femur (resporption) after THA  (due to stress shielding)  continues to be a  problem1,2,3,4,5,12. Proximal  stress shielding occurs  regardless of fixation method  (cement, cementless). The  resultant bone loss can lead to implant loosening and  or breakage of the implant. We are seeing younger  patients with higher levels of physical activity as  compared to just a decade ago. This has brought  back a renewed interest in hip resurfacing along with  significant interest in minimally invasive surgical  approaches and smaller profile implants.

Tissue sparing surgery in THA is credited to Prof.  Pipino, from Monza, Italy who has been working on  this concept for over 30 years6.The Apex ARC™  Stem is built off the pioneering work of Pipino,  Freeman, Townley and Whiteside with new novel  design features. In this paper, we review design  rationale, surgical technique, clinical impressions,  learning curves and lessons learned to-date. In  particular, our first 650 stems have been implanted,  with 500 being reviewed by the posted surgical team  over the past 16 months.

Key Words: Total Hip Arthroplasty,  tissue sparing, neck preserving, neck stabilize


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How to Cite

McTighe, Dr. H.S. (hc), T., & Brazil, PhD, D. (2011). Design Rationale and Early Clinical / Surgical Observations with a Short Curved Tissue Sparing Hip Implant “The Apex ARC™ Stem”. Reconstructive Review, 1(1).



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