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Initial stability of two different hip revision concepts: A biomechanical study
Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
1999 (English)In: Hip International, ISSN 1120-7000, Vol. 1, 7-13 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
1999. Vol. 1, 7-13 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-12808OAI: oai:DiVA.org:liu-12808DiVA: diva2:17096
Available from: 2007-11-28 Created: 2007-11-28 Last updated: 2009-08-20
In thesis
1. On Fixation of Hip Prostheses
Open this publication in new window or tab >>On Fixation of Hip Prostheses
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis, comprising 5 separate studies, is concerned with fixation of prosthetic components in total hip arthroplasty. The results and conclusions of the studies fol-low;

The initial stability of femoral revision components, the long cementless PCA stem and the Exeter standard stem cemented in a bed of impacted bone graft, was com-pared in an experimental study. The PCA stem was more stable than the Exeter stem. However, for both stems initial stability may not be sufficient to allow bone ingrowth. Initial fixation is especially vulnerable to torsion.

Identical femoral stems with or without HA-coating were compared in a prospec-tive randomized clinical trial. The long-term stable fixation of a cementless Link RS femoral component was improved by application of hydroxyapatite coating to the femoral stem.

In a clinical study the method of extensive impaction of morsellized bone allograft and a hydroxyapatite-coated cementless Mallory-Head acetabular component was found to be advantageous for acetabular revision in the presence of contained or acetabular wall defects. The limited contact between the HA-coated implant and living host bone did not seem to compromise long-term stable fixation.

Two different cup designs were compared in a prospective randomized RSA study. At 3 years after implantation the cemented low profile Lubinus FAL cup performed as well as the cemented Lubinus Standard cup in terms of migration and polyethyl-ene wear.

In a study of the relationship between radiolucent lines and migration the Lubinus FAL cup displayed more radiolucent lines in the cement bone interface than the Lubinus Standard cup but no difference in migration was found. Early appearance of such radiolucent lines represents an unspecific finding without reliable correla-tion to 3-year migration of the acetabular component.

Place, publisher, year, edition, pages
Institutionen för klinisk och experimentell medicin, 2007
Series
Linköping University Medical Dissertations, ISSN 0345-0082 ; 1014
Keyword
Fixation, Hip prostheses, primary arthroplasty, revision arthroplasty, cemented, uncemented, bone grafting, Fixation, Höftprotes, primärartroplastik, revisionsartroplastik, cement, cementfri, bentransplantation
National Category
Surgery
Identifiers
urn:nbn:se:liu:diva-10351 (URN)978-91-85895-98-4 (ISBN)
Public defence
2007-10-12, Berzeliussalen, Hälsouniversitetet, Campus US, Linköpings universitet, Linköping, 09:00 (English)
Opponent
Supervisors
Available from: 2007-11-28 Created: 2007-11-28 Last updated: 2009-08-22

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Palm, LarsIvarsson, IngemarJacobsson, Sven-Arne

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Orthopaedics and Sports Medicine Faculty of Health SciencesDepartment of Orthopaedics Linköping
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