Polarstem Cementless Hip Stem (Polarstem)

Patients enrolled in this multicenter clinical observation will have at least one of the indications listed below and meet all of the inclusion criteria. Patients meeting any of the exclusion criteria are not eligible for this study.

Indications

• Primary or secondary coxarthrosis
• Rheumatoid arthritis
• Developmental dysplasia of the hip (Crowe type I and II)
• Fracture or avascular necrosis of the femoral head

Inclusion Criteria:

• Patient has no general medical contraindication to surgery
• Informed consent to participate in the MCO signed by the patient
• Routine radiographic assessment is possible
• Patient is likely to comply with study follow-up requirements
• Primary total hip replacement (THR) to the affected side, unilateral or bilateral

Exclusion Criteria:

• Previously failed endoprosthesis and /or THR components in relevant hip
• History of infection in the affected joint; systemic infections
• Grossly insufficient femoral or acetabular bone stock in the involved hip
• Charcot joint disease or other severe neurosensory deficit
• Severe spinal disorders
• Age of patient at date of surgery > 75 years
• High comorbidity
• Cemented acetabular cup