Gait Analysis of Anterior Versus Posterior Approach in Performance of Total Hip Arthroplasty

This is a prospective study of two different surgical approaches to THA, direct anterior vs
posterior approach in approximately 64 patients that meet the standard criteria for the
implantation of primary total hip replacement utilizing the Medacta implants and have
elected to undergo THA.

Inclusion Criteria:

- Patients fulfilling the standard criteria for the implantation of primary total hip
arthroplasty

- Those presenting with primary or secondary osteoarthritis

- Those presenting with disease that meets the indications for use for Medacta USA
implants defined by this study (on-label use)

Exclusion Criteria:

- Pregnant women or women who plan to conceive within the year following surgery

- Inflammatory arthritic condition

- Those whose prospects for a recovery to independent mobility would be compromised by
known coexistent, medical problems

- Those already treated with a failed Total Hip Arthroplasty (THA)

- Muscle contracture around the hip joint

- Individuals who have undergone organ transplant

- Those with a known co-existent medical condition where death is anticipated within
five years due to the pre-existing medical condition.

- Those with one or more medical conditions identified as a contraindication defined by
the labeling on any Medacta implants used in this study

- Individuals who have had a THA on the contra-lateral side within the 6 months.

- Individuals who have undergone a THR on the contra-lateral side and whose outcome is
considered unsatisfactory or not good

- Individuals requiring bilateral hip replacement

- Individuals whose body mass index (BMI; kg/m2) >40

- Individuals with active or suspected infection or sepsis

- Individuals with chronic renal failure as defined by the need for dialysis

- Patients with severe forms of developmental dysplasia of the hip (DDH): Crowe types
II, III, IV

- History of drug and/or substance abuse