Authors reviewed 85 primary total hip arthroplasties which a Harris-Galante porous coated acetabular component had been used with minimum 2 years follow up (average 50 months) to identify the radiographic and clinical results.
@ES The results were followings.
@EN1. With insertion of uncemented acetabular component with line to line technique, initial gaps
were existed in 44 of 85 cases (51.8%)and present predominant in zone 1.
2. Incidence of radiolucent line in cases without initial gap was lower than that initial gap, but which was not statistically significant.
3. Incidence of progressive radiolucent line in cases without initial gap was significantlylower than that with initial gap.
4. Mean liner wear rate was 0.31±mm/year
5. 2 cases of pelvic osteolysis and 1 case of aseptic loosening were developed, and 2 case of revisions were performed because of recurrenent dislocation and dislodgement of polyethylene liner.
6. Final radiographic results according to Glassman and Engh's criteria in cases without initial gap were better than those with initial gap.
Conclusively, radiographec results without initial gap between uncemented acetabulay component and bone were significantly better than those with initial gap, especially in terms of the incidence of progressive radiolucent line. So, it is
necessary
to
improve surglcal technique to eliminate or reduce initial peripheral gap around socket, and press fit might be one of the good answer.
To date, pelvic osteolysis, excessive wear of polyethylene, and dislodgement of polyethylene liner have not been major problems, but continued follow up is required and methods for solving such problems should be considered.
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