Paper Title:
Use of HA–PLLA Composite Screws to Fix Acetabular Bone Graft in Cemented THA: Absorption Pattern of Screws in Six Patients
  Abstract

We used a composite of uncalcined and unsintered hydroxyapatite (u-HA) particles and poly-l-lactide (PLLA) to fix the acetabular bone graft in total hip arthroplasty (THA) in a clinical trial in six patients, and followed them for over 10 years. The patients were evaluated clinically and radiologically to assess the safety and efficacy of the screws and the characteristics of their absorption. No patient in this series experienced revision or radiographic loosening during the follow-up period. The configurations of the HA–PLLA composite screws were confirmed on early post-operative radiographs in every case, whereas they appeared obscure on radiographs within 5 years after surgery, and only osteosclerotic traces remained in the screw positions at the final follow-up. Some screw heads were covered with bone within 3 months of surgery, and some screw heads migrated laterally with breakage, but were absorbed in situ within 5 years. The screws seemed to have no negative effect on the mid-term clinical results of the THAs.

  Info
Periodical
Key Engineering Materials (Volumes 493-494)
Main Theme
Edited by
Eyup Sabri Kayali, Gultekin Goller and Ipek Akin
Pages
422-425
DOI
10.4028/www.scientific.net/KEM.493-494.422
Citation
K. Goto, H. Akiyama, K. Kawanabe, K. So, T. Nakamura, "Use of HA–PLLA Composite Screws to Fix Acetabular Bone Graft in Cemented THA: Absorption Pattern of Screws in Six Patients", Key Engineering Materials, Vols. 493-494, pp. 422-425, 2012
Online since
October 2011
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