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Total hip arthroplasty (THA) is becoming more and more common in the US as people continue to live longer and more active lives. The main reason that a THA is required is due to the " wear and tear " affliction of osteoarthritis, which in the year 2000 had at least 3% of the population over 30 showing symptoms 8. A revitalized approach to THA is the direct anterior approach, or Smith-Petersen approach, which limits the amount of musculature affected by the surgery and creates a very stable joint post-operatively 2. While this approach is showing great clinical success, it does require slightly unconventional patient positioning. The pioneers of this surgical approach include Dr. Joel Matta, who along with Mizuhosi (Union City, CA, USA) has created an impressive direct anterior approach surgical table to address the problems associated with getting patients in the right position. Unfortunately, this table is very expensive, gives no feedback on force application, and surgeons are being taught that it is required to perform the procedure. This thesis introduces a simple set of surgical tooling that facilitates the direct anterior approach very cost effectively, giving the surgeon the feedback lacking in the expensive Mizuhosi table, and the flexibility to attempt the approach without convincing his or her hospital to make such a large capital investment. A prototype was successfully developed and tested to show that a simple solution exists to make the direct anterior approach more feasible for surgeons to incorporate into their practice. v ACKNOWLEDGMENTS Thank you to the whole Cal Poly community for the support and education that has made me the man I am today. I couldn't have picked a better place to learn how to identify, dissect, and work through problems of any nature. Particular thanks are due to Dr. Hazelwood for allowing me the freedom to pursue my own project, and for encouraging me when it took longer than expected. My family has always been there to console me after a tough test and celebrate after a good one. I love you all so much and can never express how important you are to me. Thank you Rachael for your unending support and understanding through this process. I love you and can't wait to start our lives together. This project wouldn't exist without the ideas, encouragement, and funding of my brother Dr. Chris Meckel, and his colleague Dr. Phil Merritt. Thank …

Surgical Tooling Designed for the Direct Anterior Approach to Total Hip Arthroplasty