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Finite element study of the acetabulum in cemented hip arthroplasty investigating retention or removal of the subchondral bone plate

Tanner, Elizabeth LU ; Svensson, Ingrid LU ; Samuelsson, Fredrik and Flivik, Gunnar LU (2016) In Biomedizinische Technik. Biomedical engineering 61(5). p.525-536
Abstract

The importance of the subchondral bone plate of the acetabulum when preparing the pelvis for a cemented acetabular cup during total hip arthroplasty (THA) has been investigated using finite element analysis. The effect of retaining or removing the subchondral bone plate and the use of anchoring holes are compared. Loading was applied via both hip joint contact force and the activity of up to 22 muscles at five stages through the load bearing phase of the gait cycle. Removing the subchondral bone plate leads to decreased stresses in the cancellous bone and slightly increased stresses in the cortical shell superior to the acetabulum. The differences between the two cases are small, nevertheless there are indications that removal of the... (More)

The importance of the subchondral bone plate of the acetabulum when preparing the pelvis for a cemented acetabular cup during total hip arthroplasty (THA) has been investigated using finite element analysis. The effect of retaining or removing the subchondral bone plate and the use of anchoring holes are compared. Loading was applied via both hip joint contact force and the activity of up to 22 muscles at five stages through the load bearing phase of the gait cycle. Removing the subchondral bone plate leads to decreased stresses in the cancellous bone and slightly increased stresses in the cortical shell superior to the acetabulum. The differences between the two cases are small, nevertheless there are indications that removal of the subchondral bone plate reduces the stresses. Increasing the cement penetration depth leads to a slightly more rigid structure, due to cement penetrating the cancellous bone. Adding anchoring holes moves the position of the highest cancellous bone strains from the bone-cement interface into the cancellous bone. Thus removal of the subchondral bone plate should lead to an increased potential for cement penetration into the cancellous bone which should be beneficial for cup fixation and thus improve long term implant survival.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
acetabular reconstruction, biomechanics, FEA modeling, hip replacement, subchondral bone plate
in
Biomedizinische Technik. Biomedical engineering
volume
61
issue
5
pages
12 pages
publisher
De Gruyter
external identifiers
  • scopus:84990944504
  • wos:000385815400008
ISSN
0013-5585
DOI
10.1515/bmt-2015-0162
language
English
LU publication?
yes
id
729651d3-6e5c-4dfc-9330-450be1e64b2a
date added to LUP
2016-11-01 09:08:28
date last changed
2017-01-01 08:38:09
@article{729651d3-6e5c-4dfc-9330-450be1e64b2a,
  abstract     = {<p>The importance of the subchondral bone plate of the acetabulum when preparing the pelvis for a cemented acetabular cup during total hip arthroplasty (THA) has been investigated using finite element analysis. The effect of retaining or removing the subchondral bone plate and the use of anchoring holes are compared. Loading was applied via both hip joint contact force and the activity of up to 22 muscles at five stages through the load bearing phase of the gait cycle. Removing the subchondral bone plate leads to decreased stresses in the cancellous bone and slightly increased stresses in the cortical shell superior to the acetabulum. The differences between the two cases are small, nevertheless there are indications that removal of the subchondral bone plate reduces the stresses. Increasing the cement penetration depth leads to a slightly more rigid structure, due to cement penetrating the cancellous bone. Adding anchoring holes moves the position of the highest cancellous bone strains from the bone-cement interface into the cancellous bone. Thus removal of the subchondral bone plate should lead to an increased potential for cement penetration into the cancellous bone which should be beneficial for cup fixation and thus improve long term implant survival.</p>},
  author       = {Tanner, Elizabeth and Svensson, Ingrid and Samuelsson, Fredrik and Flivik, Gunnar},
  issn         = {0013-5585},
  keyword      = {acetabular reconstruction,biomechanics,FEA modeling,hip replacement,subchondral bone plate},
  language     = {eng},
  month        = {10},
  number       = {5},
  pages        = {525--536},
  publisher    = {De Gruyter},
  series       = {Biomedizinische Technik. Biomedical engineering},
  title        = {Finite element study of the acetabulum in cemented hip arthroplasty investigating retention or removal of the subchondral bone plate},
  url          = {http://dx.doi.org/10.1515/bmt-2015-0162},
  volume       = {61},
  year         = {2016},
}