A Prospective, Pre-market, Multi-center Study of Insignia Hip Stem in THA to Determine Implant Survivorship and PROMS.

Inclusion Criteria: * The patient has signed the study specific, Human Research Ethics Committee (HREC) approved, Patient Information Consent Form for the use of the study device * Primary non-inflammatory degenerative joint disease (including osteoarthritis or avascular necrosis) and/or rheumatoid arthritis * The patient is a candidate for a primary cementless THA. * Patients who are informed of the conditions of the study and are willing to participate for the length of the prescribed follow-up period. Exclusion Criteria: * Active or suspected latent infection in or about the affected hip joint and the time of study device implantation. * Any mental or neuromuscular disorder which would create an unacceptable risk of prosthesis instability, prosthesis fixation failure or complications in post-operative care. * Has bone stock compromised by disease, infection or prior implantation which cannot provide adequate support and/or fixation to the prosthesis. * Is immunologically suppressed or receiving steroids in excess of normal physiological requirements (e.g. \>30 days.) * Requires revision THA or hip fusion to the affected joint. * Has known sensitivity to device materials. * Any involvement in an active Workers' Compensation investigation