Osteoarthritis
Conditions
Keywords
Acetabular implant
Brief summary
Total replacement of hip joint is one of the most important medical innovations of the twentieth century. More than 100,000 hip replacements are being laid each year in France. Improved fixation, reduced wear rates and reduced implant dislocation rates remain subjects of continuous improvement. Hip implants cemented and cementless are part of therapeutic arsenal of orthopedic surgeons for joint replacement of the defective hip. The anchor and friction torque are both essential to the survival of hip implants. Therefore acetabular implants without cement with ceramic insert or polyethylene in a metalback or full polyethylene coated with titanium grains without metalback are proposed, but they have their own complications (Squeaking, fractures, recovery difficulties, difficult radiographic analysis, high cost for ceramics, primary stability defects, instability of the instrument set, Titanium residues in absence of metalback. An alternative to these implants may be an acetabular component without cement with polyethylene insert with an end metalback to increase both polyethylene thickness and size of the head in order to expect a low complication rate with important longevity for a lower cost. This study was conducted to ensure the safety and effectiveness of the acetabular implant POLYMAX
Interventions
OTHEREarly complications data
Early complications of interest are : * New arthroplasty for any reason * Related to the implant : * Wrong position of the implant * Early displacement of the implant * Related to the intervention : * Hematoma * Dislocation (or not causing the resumption of joint replacement) * Deep vein thrombosis * Pulmonary embolism * Acute Infection
OTHERLate stage complications data
Late complications taken into account are: * New arthroplasty for any reason * Aseptic loosening * Delayed hypersensitivity reaction type IV * Solid Tumors * Recurrent dislocation (causing or not the resumption of joint replacement) * Allergic reactions of any kind * Chronic infection
OTHERPatient Satisfaction
Patient satisfaction evaluated by Womac reduced Score
OTHEREfficacity
Efficacity as evaluated by Harris HIP score
Bone reaction visible in radiography
Sponsors
University Hospital, Toulouse
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patient suffering from hip disease: primary or secondary hip osteoarthritis or osteonecrosis. * Patient having been implanted with a POLYMAX implant; * Patient having agreed to participate in a follow-up 5 years; * Patient who have accepted the use of their data in the context of this study. * Patient having pre-operative and post-operative data
Exclusion criteria
* Pre or post-operative Partial data * Patients not available for follow up at 2 and 5 years .. * Metabolic disease or autoimmune witch may interfere with bone growth not allowing the indication of a prosthesis without cement, * Mental disorder or disease of proven behavior. * Severe osteoporosis, * Direct or indirect bone irradiation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Innocuity of POLYMAX acetabular implant as assessed by data collected on early complications | 60 months |
| Innocuity of POLYMAX acetabular implant as assessed by data collected on late-stage complications | 60 months |
Secondary
| Measure | Time frame |
|---|---|
| Efficacity of POLYMAX acetabular implant as assessed by Harris clinical score | 60 months |
| Patient satisfaction as assessed by Womac reduced score | 60 months |
| Evaluation of implant good holding as assessed by apparition of radiolucent lines in radiography | 60 months |
Countries
France
Outcome results
None listed