J Korean Orthop Assoc.  2008 Dec;43(6):710-717.

Long-term Follow-up Results after Hip Arthroplasty using a Cementless Spotorno (CLS) Femoral Stem

• Lee JM
• Park YS

Abstract

PURPOSE: The purpose of this study was to evaluate the long-term clinical and radiological findings in patients who underwent total hip arthroplasty using a CLS femoral stem.
MATERIALS AND METHODS
We evaluated 40 patients (47 hips) who underwent total hip arthroplasty using a CLS femoral stem between 1988 and 1992. The average patient age at the time of operation was 45.3 years, and the average duration of follow-up was 17 years 3 months (range, 15 years to 19 years 10 months).
RESULTS
No femoral stem revisions were performed. The average Harris hip score improved from 51.9 preoperatively to 94.9 at final follow-up. Radiographically, small osteolytic lesions were found in 17 cases (36.2%), and endosteal bone formations were found in 44 cases (93.6%). Acetabular cup loosening occurred in 3 cases, and acetabular cup revisions were performed. Additionally, a liner change was performed in 1 case. One periprosthetic fracture and one dislocation were noted.
CONCLUSION
Fifteen-to-twenty-year follow-up results after total hip arthroplasty using a CLS femoral stem were excellent, with no patients requiring femoral stem revision.

Keyword

CLS femoral stem; Total hip arthroplasty

MeSH Terms

Arthroplasty
Dislocations
Follow-Up Studies
Hip
Humans
Periprosthetic Fractures

Figure

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  Fig. 1 (A) Preoperative anteroposterior radiograph of a 46-year-old man showing osteonecrosis of left femoral head. (B) Radiograph immediately after bipolar hemiarthroplasty using CLS stem. (C) Radiograph at 19-years postoperatively, showing stable fixation of the femoral stem.

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  Fig. 2 (A) Preoperative anteroposterior radiograph of a 43-year-old man showing osteonecrosis of both femoral head. (B) Radiograph immediately after bilateral total hip arthroplasty using CLS femoral stem and CLW cup. (C) Radiograph taken 18-years after THA

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  Fig. 3 (A) Preoperative anteroposterior radiograph of a 55-year-old man showing osteonecrosis of both femoral head. (B) Radiograph immediately after bilateral total hip arthroplasty using CLS femoral stem and HGII cup. (C) Radiograph taken 15-years after THA.

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  Fig. 4 (A) Preoperative anteroposterior radiograph of a 34-year-old man showing osteonecrosis of left femoral head. (B) Radiograph taken 17-years after THA using CLS femoral stem and CLS expansion cup.

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  Fig. 5 (A) Distal part of CLS femoral stem immediately after THA. (B) Radiograph taken 16-years after THA showing endosteal bone formation at Gruen Zone 3, 5, 12 and 13.

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  Fig. 6 Endosteal bone formation according to Gruen zone.

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