Anthology Hip Replacement System - Orthopaedic Data Evolution Panel (ODEP) Surveillance Study

Study Overview
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Brief Summary
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This clinical study will verify the clinical and radiographic performance of the prosthesis when used in human subjects over a period of 10 years. All complications will be documented.

Detailed Description
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The clinical evaluations will be based on standard, functional and pain parameters Harris Hip Score pre-operatively, and at 6 months, 3, 5, 7.5 and 10 years post-operatively. Postal Oxford questionnaire preoperatively, and yearly thereafter. The objective of this study is to analyse the clinical and radiographic responses and the complication rates for patients undergoing primary total hip arthroplasty using the Anthology Hip Replacement System (Anthology Hip System).

Official Title
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Anthology Hip Replacement System - Orthopaedic Data Evolution Panel (ODEP) Surveillance Study

Conditions
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Primary Total Hip Replacement (THR), Primary Osteoarthritis, Secondary Osteoarthritis, Avascular Necrosis

Intervention / Treatment
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* Device: Anthology Hip Replacement System


Participation Criteria
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Eligibility Criteria
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Inclusion criteria: Those presenting with primary or secondary osteoarthritis or avascular necrosis of the femoral head or patients suitable for a primary total hip replacement. This is the patient group that will benefit from operative surgery to treat osteoarthritis. Those deemed capable of giving informed consent, understanding the aims of the study and expressing willingness to comply with the post-operative review programme. Patients capable of giving informed consent are eligible for inclusion into the study. Participants who signed the Ethics Committee approved specific Informed Consent Form prior to surgery. Patients who have not given informed consent will not be eligible for inclusion into the study. Exclusion criteria: Patients whose prospects for a recovery to independent mobility would be compromised by known coexistent, medical problems. Patients not suitable for primary hip replacement. Patients with active or suspected infection.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: Anthology Hip Replacement System|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Harris Hip Score - 10 years | The Harris Hip Score is a joint specific score that consists of 10 items covering domains of pain (1 item, 0-44 points), function (7 items, 0-47 points), functional activities, absence of deformity (1 item, 0 or 4 points), and hip range of motion (2 items, 0-5 points). Scores range from 0 (worst) to 100 (best). | 10 years post operative | 
| Quality of life with Oxford Hip Score (postal) - 10 years | Patients are asked to reflect on their pain and functional ability over the previous four weeks. There are two domains (pain and function) with six items or questions in each. Each item has five possible responses. In the original scoring responses were from 1 = least difficult to 5= most difficult. Item scores are summed to give a total score from anywhere between 12 and 60. The lower the score, the better the outcome. | 10 years post operative | 
| Quality of life with EuroQol Questionnaire (EQ-5D) -10 years | The descriptive system consists of five dimensions (mobility, self-care, usual activities, pain/discomfort, anxiety/depression) each of which takes one of three responses. The responses record three levels of severity (no problems/some or moderate problems/extreme problems) within a particular dimension. The EQ VAS records the respondent's self-rated health on a vertical, visual analogue scale where the endpoints are labelled 'Best imaginable health state' and 'Worst imaginable health state'. This information can be used as a quantitative measure of health outcome as judged by the individual respondents. | 10 years post operative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Harris Hip Score | The Harris Hip Score is a joint specific score that consists of 10 items covering domains of pain (1 item, 0-44 points), function (7 items, 0-47 points), functional activities, absence of deformity (1 item, 0 or 4 points), and hip range of motion (2 items, 0-5 points). Scores range from 0 (worst) to 100 (best). | Pre-operative and 6 months, 3 years, 5 years, and 7.5 years post operative | 
| Quality of life with Oxford Hip Score (postal) | Patients are asked to reflect on their pain and functional ability over the previous four weeks. There are two domains (pain and function) with six items or questions in each. Each item has five possible responses. In the original scoring responses were from 1 = least difficult to 5= most difficult. Item scores are summed to give a total score from anywhere between 12 and 60. The lower the score, the better the outcome. | Pre-operative and 6 months, 3 years, 5 years, and 7.5 years post operative | 
| Quality of life with EuroQol Questionnaire (EQ-5D) | The descriptive system consists of five dimensions (mobility, self-care, usual activities, pain/discomfort, anxiety/depression) each of which takes one of three responses. The responses record three levels of severity (no problems/some or moderate problems/extreme problems) within a particular dimension. The EQ VAS records the respondent's self-rated health on a vertical, visual analogue scale where the endpoints are labelled 'Best imaginable health state' and 'Worst imaginable health state'. This information can be used as a quantitative measure of health outcome as judged by the individual respondents. | Pre-operative and 6 months, 3 years, 5 years, and 7.5 years post operative | 
| Device-related complications | Complications and adverse events will be noted at each follow-up and using clinical judgement it will be determined whether the event is device related | 6 months, 3 years, 5 years, 7.5 years, and 10 years post operative | 
| Number of revisions or withdrawals for any reason |  | 6 months, 3 years, 5 years, 7.5 years, and 10 years post operative | 
| Radiographic evaluations | Anterior-posterior, and lateral view x-rays of the femur and pelvis of the affected hip will be evaluated. X-rays will be reviewed and specific information regarding presence/absence/location of radiolucent lines and implant positions and alignment will be recorded. | Pre-operative, peri-operative, 6 months, 3 years, 5 years, 7.5 years, and 10 years post operative | 
| Survival Rate | The survival rate will be calculated according to the method in accordance with Kaplan-Meier stating the 95% confidence interval. | 10 years post operative | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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THR, Anthology Hip Replacement