J Korean Orthop Assoc.  2005 Feb;40(1):19-24.

The Results of Primary Cementless THA using Landos Hydroxyapitite-Coated Prosthesis: Minimum 5 Year Follow-up

• Kong CB
• Song WS
• Yoo JJ
• Koo KH
• Yoon KS
• Kim SR
• Kim YM
• Kim HJ

Abstract

PURPOSE
To evaluate the results of primary cementless total hip arthroplasty (THA)using the Landos Atoll hydroxyapatite (HA)-coated cup and the Euroform HA-coated stem. MATERIALS AND METHODS: Sixty-four primary THA were performed between November 1991 and October 1994, and were followed more than 5 years. Clinical and radiological results were assessed.Also, the evidence of loosening were observed. RESULTS: The mean Harris hip score improved from 57.0 points preoperatively to 88.5 points postoperatively. Of the 64 cases of emoral stems, 54 cases (84.4%) were classified as stable bone-ingrowth ixa tion, and 10 cases (15.6%)as stable fibrous fixation at the last follow-up. The linear wear of polyethylene insert was 1.83 mm (0.14-4.15 mm)and the linear wear rate was 0.23 mm/yr (0.02-0.72 mm/yr).During the follow-up period, revisions were required in 31 cases (48.4%);18 cases (28.1%)had been reoperated upon and 13 cases were (20.3%)awaiting for reoperation. Excessive early osteolysis were observed in 3 cases within 5 year.1 case in those 3 cases underwent cup revision and another 2 cases underwent head and liner change with bone grafting. CONCLUSION: Landos Atoll HA-coated acetabular cup which followed for minimum 5 years reveals 48.4% failure rate.

Keyword

THA; Landos; Hydroxyapatite

MeSH Terms

Acetabulum
Arthroplasty, Replacement, Hip
Bone Transplantation
Durapatite
Follow-Up Studies*
Head
Hip
Osteolysis
Polyethylene
Prostheses and Implants*
Reoperation
Durapatite
Polyethylene