2024-03-28T16:55:21Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00038765
2022-04-27T09:08:39Z
2780:333
2780:4952
2780:5357
2780:5358
3:62:5296:5355
Three-Dimensional Analysis of the Contact Pattern between the Cortical Bone and Femoral Prosthesis after Cementless Total Hip Arthroplasty
三島, 初
菅谷, 久
西野, 衆文
山崎, 正志
Wada, Hiroshi
Mishima, Hajime
Sugaya, Hisashi
Nishino, Tomofumi
Yamazaki, Masashi
© 2016 HiroshiWada et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The cementless stem Excia (B. Braun, Melsungen, Germany) implant has a rectangular cross-sectional shape with back-and-forth flanges and a plasma-sprayed, dicalcium phosphate dihydrate coating from the middle to proximal portion to increase initial fixation and early bone formation. Here, the conformity of the Excia stem to the femoral canal morphology was three-dimensionally assessed using computed tomography. Forty-three patients (45 hips) were examined after primary total hip arthroplasty with a mean follow-up of 27 ± 3 months (range: 24–36 months). Spot welds occurred at zone 2 in 16 hips and at zone 6 in 24 hips, with 83% (20/24 hips) of those occurring within 3 months after surgery. First- ( hips), second- (), and third- () degree stress shielding were observed. The stem was typically in contact with the cortical bone in the anterolateral mid-portion (100%) and posteromedial distal portions (85%). Stress shielding did not progress, even in cases where the stems were in contact with the distal portions. The anterior flange was in contact with the bone in all cases. The stability of the mid-lateral portion with the dicalcium phosphate dihydrate coating and the anterior flange may have inhibited the progression of stress shielding beyond the second degree.
Hindawi Publishing Corporation
2016
eng
journal article
http://hdl.handle.net/2241/00143435
https://tsukuba.repo.nii.ac.jp/records/38765
26881087
10.1155/2016/8052380
2090-3464
Advances in orthopedics
2016
8052380
https://tsukuba.repo.nii.ac.jp/record/38765/files/AO_2016-8052380.pdf
application/pdf
3.3 MB
2016-07-28