Total Hip Arthroplasty (THA) Surgical Techniques Comparing the Direct Anterior Approach to the Posterior Approach

Prospective Randomized Single Center Clinical Evaluation of THA Surgical Techniques Comparing the Direct Anterior Approach to the Posterior Approach

The purpose of this study is to compare the short term effectiveness and return to function of subjects undergoing primary Total Hip Arthroplasty using an Anterior Approach (incision on the front part of the hip joint) versus Posterior Approach (incision over back part of the hip joint).

The anterior approach may provide better early post-operative outcomes because there are fewer muscles at the front of the hip so the surgeon works between them rather than cutting through muscle fibers. However, the anterior approach is more difficult to access so usually requires a specialized table.

The posterior approach is easier to access, but the incision cuts through muscle fiber. This may lengthen recovery time. However, a specialized table, which can be quite expensive, is often not required.

Inclusion Criteria:

1. Subject is able to or capable of providing consent to participate in the clinical investigation.
2. Subject is between the ages of 20-75 years, inclusive.
3. Subject requires a cementless, primary total hip arthroplasty for non-inflammatory degenerative joint disease (NIDJD)
4. Subject has sufficient bone stock for the hip replacement device.
5. Subject is a suitable candidate for the devices specified in the clinical investigation plan and is willing to be randomized to either surgical approach.

Exclusion Criteria:

1. Subject in the opinion of the Investigator has an existing condition that would compromise his /her participation and follow-up in this investigation.
2. Subject has had previous surgery on the affected hip.
3. Subject has significant osteoarthritis of the contra-lateral hip requiring a total hip arthroplasty within 12 months.