Investigation to Determine Safety of Taperloc Stems With BioGuard Coating When Used in Cementless Total Hip Arthroplasty

Inclusion Criteria: * Eligible for cementless primary total hip arthroplasty according to the Surgical Technique brochure (Appendix 10): "The Taperloc Porous Primary Hip and Exceed ABT Taperfit Prostheses are marketed for non-cemented use in skeletally mature patients undergoing primary hip replacement surgery of non inflammatory degenerative joint disease." * Under 80 and over 40 years of age * A pre-operative level of pain and function the same as for conventional joint replacement. * A likelihood of obtaining relief of pain and improved function * Full skeletal maturity * Ability to follow instructions * Good general health for age * Willing to return for follow-up evaluations Exclusion Criteria: * Patients aged over 80 and under 40 years * Known allergy to any antibiotics * Active infection * Revision arthroplasty * Marked bone loss which could preclude or compromise adequate fixation of the device * Uncooperative subjects * Parkinson's Disease * Vascular insufficiency of the affected limb, which could compromise bony ingrowth/implant fixation, i.e., diabetes. * Severe instability or deformity of the ligaments and/or surrounding soft tissue which may preclude stability of the device * Pregnancy * BMI \> 40 * Use of immunosuppressive drugs * Women of child bearing potential