Multicentre Prospective Study to Evaluate Long-term Clinical Outcomes of the Sirius Cemented Femoral Stem

Inclusion Criteria: Selection of subjects for this evaluation should be in accordance with the indications of Sirus stem: 1. Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis. 2. Rheumatoid arthritis 3. Correction of functional deformity 4. Treatment of non-union, femoral neck fracture and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques. 5. Revision procedures where other treatments or devices have failed. The Sirius Femoral Hip Stem is intended for cemented use only and may be used in partial and total hip arthroplasties Exclusion Criteria: * Absolute contraindications include: infection, sepsis, osteomyelitis Additional contraindications include: * Uncooperative patient or patient with neurologic disorders who are incapable of following directions, * Osteoporosis, * Metabolic disorders which may impair bone formation * Osteomalacia * Distant foci of infections which may spread to the implant site * Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram * Vascular insufficiency, muscular atrophy or neuromuscular disease.