This arm utilizes the ceramic on metal articulation using the M2a-38™ mm cup.

This arm utilizes the metal on metal articulation using M2a-38™ mm cup.

Ceramic on Metal articulation using M2a-38™ mm cup

CCS is defined as:

a. Total Harris Hip Score > 80 points, and b. No acetabular or femoral revision or removal, and c. No pending acetabular or femoral revision or removal as defined in radiographic evaluation by: i. An acetabular radiographic assessment with all of the following:

1. Migration < 4 mm, and
2. Change in angle of inclination < 4o, and
3. Absence of osteolysis, and ii. A femoral radiographic assessment with all of the following:

1. Subsidence < 5 mm, and 2. Absence of osteolysis.

The HHS including a series of questions answered by the patient and physical examinations recorded by a qualified health care professional covers four domains: pain (one item, 0-44 points), function and functional activities (seven items, 0-47 points), absence of deformity (one item, 0-4 points) and range of motion (one item, 0-5 points). To obtain a final score, the points are summed. The outcome score can be categorized as Excellent: 90-100; Good: 80-90; Fair: 70-80; Poor: < 70

The Oxford Hip Score (OHS) is a patient-reported outcome measure that was developed to specifically assess the patient's perspective of outcome following THA. The OHS consists of twelve questions covering function and pain associated with the hip. To calculate the total score, each response is scored from 0 (worst outcome) to 4 (best outcome) and the sum of all 12 items is reported with a maximum of 48, representing the best score possible. The outcome score can be categorized as Excellent: > 41; Good: 34 - 41; Fair: 27 - 33; Poor: < 27.

Patients that underwent total hip arthroplasty, who received a M2a-38mm cup and the Biolox delta 38 mm ceramic femoral head.

Patients that underwent total hip arthroplasty, who received a M2a-38mm cup and the 38 mm cobalt chromium molybdenum (CoCrMo) modular femoral head.

Age (years) at date of surgery

CCS is defined as:

a. Total Harris Hip Score > 80 points, and b. No acetabular or femoral revision or removal, and c. No pending acetabular or femoral revision or removal as defined in radiographic evaluation by: i. An acetabular radiographic assessment with all of the following:

1. Migration < 4 mm, and
2. Change in angle of inclination < 4o, and
3. Absence of osteolysis, and ii. A femoral radiographic assessment with all of the following:

1. Subsidence < 5 mm, and 2. Absence of osteolysis.

The HHS including a series of questions answered by the patient and physical examinations recorded by a qualified health care professional covers four domains: pain (one item, 0-44 points), function and functional activities (seven items, 0-47 points), absence of deformity (one item, 0-4 points) and range of motion (one item, 0-5 points). To obtain a final score, the points are summed. The outcome score can be categorized as Excellent: 90-100; Good: 80-90; Fair: 70-80; Poor: < 70

Due to a lack of radiographic evaluation data, the overall number of participants analyzed is smaller than the actual number enrolled.

Patients that underwent total hip arthroplasty, who received a M2a-38mm cup and the Biolox delta 38 mm ceramic femoral head.

One or more components revised