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Micromotion of the acetabular component and periacetabular bone morphology

Önsten, Ingemar LU ; Åkesson, Kristina LU and Obrant, Karl LU (1995) In Clinical Orthopaedics and Related Research p.103-110
Abstract
The quality of the periacetabular bone might be an explanation for the increase in the rate of socket loosening seen radiographically in patients with rheumatoid arthritis as compared with patients with osteoarthrosis. Early implant micromotion, as measured by roentgen stereophotogrammetric analysis, is of predictive value with regard to long time retention. For uncemented porous sockets, the initial fixation might be decisive for the degree of bone ingrowth. Roentgen stereophotogrammetry was used to study cemented Charnley acetabular components in 32 hips with rheumatoid arthritis and 30 hips with osteoarthrosis, and uncemented Harris-Galante acetabular components in 19 hips with osteoarthrosis. Micromotions as long as 24 months after... (More)
The quality of the periacetabular bone might be an explanation for the increase in the rate of socket loosening seen radiographically in patients with rheumatoid arthritis as compared with patients with osteoarthrosis. Early implant micromotion, as measured by roentgen stereophotogrammetric analysis, is of predictive value with regard to long time retention. For uncemented porous sockets, the initial fixation might be decisive for the degree of bone ingrowth. Roentgen stereophotogrammetry was used to study cemented Charnley acetabular components in 32 hips with rheumatoid arthritis and 30 hips with osteoarthrosis, and uncemented Harris-Galante acetabular components in 19 hips with osteoarthrosis. Micromotions as long as 24 months after surgery were related to the periacetabular cancellous bone quality, as assessed by histomorphometric methods from samples taken during surgery. Acetabular components migrated more in hips with rheumatoid arthritis than in those with osteoarthrosis (p < 0.04). Hips with rheumatoid arthritis had approximately 4 times more nonmineralized bone than hips with osteoarthrosis (p < 0.0002). However, within each diagnostic group, no correlation was found between migration and the degree of mineralization (r < or = 0.24, p > or = 0.07). Migration of uncemented acetabular components did not correlate with the histomorphometric variables (r < or = 0.20, p > or = 0.42). Histomorphologic characteristics of the periacetabular trabecular bone do not seem to be of importance for acetabular component micromotion. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Clinical Orthopaedics and Related Research
issue
310
pages
103 - 110
publisher
Lippincott Williams & Wilkins
external identifiers
  • pmid:7641425
  • scopus:0028966191
ISSN
0009-921X
language
English
LU publication?
yes
id
badac265-1115-4931-8dfa-2cc74b603f63 (old id 1109246)
date added to LUP
2008-07-25 16:37:00
date last changed
2017-03-12 03:34:35
@article{badac265-1115-4931-8dfa-2cc74b603f63,
  abstract     = {The quality of the periacetabular bone might be an explanation for the increase in the rate of socket loosening seen radiographically in patients with rheumatoid arthritis as compared with patients with osteoarthrosis. Early implant micromotion, as measured by roentgen stereophotogrammetric analysis, is of predictive value with regard to long time retention. For uncemented porous sockets, the initial fixation might be decisive for the degree of bone ingrowth. Roentgen stereophotogrammetry was used to study cemented Charnley acetabular components in 32 hips with rheumatoid arthritis and 30 hips with osteoarthrosis, and uncemented Harris-Galante acetabular components in 19 hips with osteoarthrosis. Micromotions as long as 24 months after surgery were related to the periacetabular cancellous bone quality, as assessed by histomorphometric methods from samples taken during surgery. Acetabular components migrated more in hips with rheumatoid arthritis than in those with osteoarthrosis (p &lt; 0.04). Hips with rheumatoid arthritis had approximately 4 times more nonmineralized bone than hips with osteoarthrosis (p &lt; 0.0002). However, within each diagnostic group, no correlation was found between migration and the degree of mineralization (r &lt; or = 0.24, p &gt; or = 0.07). Migration of uncemented acetabular components did not correlate with the histomorphometric variables (r &lt; or = 0.20, p &gt; or = 0.42). Histomorphologic characteristics of the periacetabular trabecular bone do not seem to be of importance for acetabular component micromotion.},
  author       = {Önsten, Ingemar and Åkesson, Kristina and Obrant, Karl},
  issn         = {0009-921X},
  language     = {eng},
  number       = {310},
  pages        = {103--110},
  publisher    = {Lippincott Williams & Wilkins},
  series       = {Clinical Orthopaedics and Related Research},
  title        = {Micromotion of the acetabular component and periacetabular bone morphology},
  year         = {1995},
}