Radiographic wear assessment in a total knee prosthesis. 5- to 9-year follow-up study of 158 knees
(1996) In Journal of Arthroplasty 11(6). p.738-742- Abstract
- One hundred fifty-eight Porous-Coated Anatomic (Howmedica, Rutherford, NJ) primary total knee prostheses were evaluated clinically and radiographically to measure the remaining thickness of the plastic insert. Anteroposterior radiographs were taken with the beam guided parallel to the tibial plate by a fluoroscope. The knees were forced into varus and valgus, and the heights of the medial and lateral joint spaces, respectively, were measured with a digitizing table. Plastic insert wear could be calculated after correction with a magnification error factor, established by dividing the projected width of the tibial plate by the true size of the used component. After a mean follow-up period of 84 months (range, 58-116 months), wear was... (More)
- One hundred fifty-eight Porous-Coated Anatomic (Howmedica, Rutherford, NJ) primary total knee prostheses were evaluated clinically and radiographically to measure the remaining thickness of the plastic insert. Anteroposterior radiographs were taken with the beam guided parallel to the tibial plate by a fluoroscope. The knees were forced into varus and valgus, and the heights of the medial and lateral joint spaces, respectively, were measured with a digitizing table. Plastic insert wear could be calculated after correction with a magnification error factor, established by dividing the projected width of the tibial plate by the true size of the used component. After a mean follow-up period of 84 months (range, 58-116 months), wear was significantly higher for patients with osteoarthritis than rheumatoid arthritis and was 1.4 mm versus 0.7 mm medially (P < .0001) and 0.7 mm versus 0.4 mm laterally (P = .01). Wear was not correlated to thickness of the plastic insert or length of follow-up period. Young age or varus alignment contributed slightly to the amount of wear. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1110362
- author
- Sanzén, Lennart LU ; Sahlström, Arne ; Gentz, Carl-Fredrik and Redlund-Johnell, Inga LU
- organization
- publishing date
- 1996
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- knee prosthesis, wear, fluoroscopy, radiography, polyethylene
- in
- Journal of Arthroplasty
- volume
- 11
- issue
- 6
- pages
- 738 - 742
- publisher
- Elsevier
- external identifiers
-
- pmid:8884451
- scopus:0029825882
- ISSN
- 0883-5403
- DOI
- 10.1016/S0883-5403(96)80014-3
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Diagnostic Radiology, (Lund) (013038000), Reconstructive Surgery (013240300), Clinical and Molecular Osteoporosis Research Unit (013242930)
- id
- f81ac721-1ed8-4c4a-8d78-6077469ad638 (old id 1110362)
- date added to LUP
- 2016-04-01 12:36:15
- date last changed
- 2022-01-27 07:22:50
@article{f81ac721-1ed8-4c4a-8d78-6077469ad638,
abstract = {{One hundred fifty-eight Porous-Coated Anatomic (Howmedica, Rutherford, NJ) primary total knee prostheses were evaluated clinically and radiographically to measure the remaining thickness of the plastic insert. Anteroposterior radiographs were taken with the beam guided parallel to the tibial plate by a fluoroscope. The knees were forced into varus and valgus, and the heights of the medial and lateral joint spaces, respectively, were measured with a digitizing table. Plastic insert wear could be calculated after correction with a magnification error factor, established by dividing the projected width of the tibial plate by the true size of the used component. After a mean follow-up period of 84 months (range, 58-116 months), wear was significantly higher for patients with osteoarthritis than rheumatoid arthritis and was 1.4 mm versus 0.7 mm medially (P < .0001) and 0.7 mm versus 0.4 mm laterally (P = .01). Wear was not correlated to thickness of the plastic insert or length of follow-up period. Young age or varus alignment contributed slightly to the amount of wear.}},
author = {{Sanzén, Lennart and Sahlström, Arne and Gentz, Carl-Fredrik and Redlund-Johnell, Inga}},
issn = {{0883-5403}},
keywords = {{knee prosthesis; wear; fluoroscopy; radiography; polyethylene}},
language = {{eng}},
number = {{6}},
pages = {{738--742}},
publisher = {{Elsevier}},
series = {{Journal of Arthroplasty}},
title = {{Radiographic wear assessment in a total knee prosthesis. 5- to 9-year follow-up study of 158 knees}},
url = {{http://dx.doi.org/10.1016/S0883-5403(96)80014-3}},
doi = {{10.1016/S0883-5403(96)80014-3}},
volume = {{11}},
year = {{1996}},
}