Five Year Results of Hydroxyapatite Coated Hip System: Early Severe Wear and Acetabular Osteolysis / 대한정형외과학회잡지
The Journal of the Korean Orthopaedic Association
; : 472-477, 2003.
Article
in Ko
| WPRIM
| ID: wpr-652250
Responsible library:
WPRO
ABSTRACT
PURPOSE: To assess the midterm results of the hydroxyapatite hip system with acetabular cups, with particular emphasis upon cup wear and loosening, using a computer assisted-3 dimensional technique. MATERIALS AND METHODS: From March 1992 to December 1996, 52 patients (61 hips) were available for inclusion in this study after an average duration of follow up of 6 years and 4 months. Clinical evaluation was performed using the Harris hip scoring system. Initial postoperative and long term follow up films were digitized, and 2 dimensional linear and 3 dimensional wear was measured by using a computer assisted-3 dimensional technique. Acetabular bone changes are described using previous published methods. RESULTS: An analysis of the clinical results showed a mean Harris hip score of 47.2 points preoperatively and 89.8 points at the final visit. The mean polyethylene 3D-linear wear rate was 0.26 mm/year and mean volumetric wear rate was 105.9 mm3/year. In 16 hips (26.2%) the linear wear rate was more than 0.3 mm/year (0.30-0.74 mm/year). Osteolytic changes of the acetabulum were recorded in 51% around acetabular cups, in which considerable wear of the acetabular polyethylene was evident by the five-year radiographic findings. CONCLUSION: Midterm results of hydroxyapatite coated acetabular cups were disappointing in terms of acetabular cup and liner wear, despite early accelerated bone remodeling by hydroxyapatite and excellent early clinical results.
Key words
Full text:
1
Index:
WPRIM
Main subject:
Osteolysis
/
Follow-Up Studies
/
Bone Remodeling
/
Durapatite
/
Arthroplasty, Replacement, Hip
/
Polyethylene
/
Hip
/
Acetabulum
Type of study:
Observational_studies
/
Prognostic_studies
Limits:
Humans
Language:
Ko
Journal:
The Journal of the Korean Orthopaedic Association
Year:
2003
Type:
Article