Meniscal Bearing Dislocation of Unicompartmental Knee Arthroplasty with Faint Symptom
Joint Authors
Matsui, Yoshio
Inagaki, Yusuke
Fujii, Tadashi
Noboru, Marehoshi
Kadoya, Yoshinori
Tanaka, Yasuhito
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-07
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Abstract EN
We experienced two cases of atypical lateral dislocations of meniscal bearing in UKA (unicompartmental knee arthroplasty) without manifest symptoms.
The dislocated bearing, which jumped onto the wall of tibial components, was found on radiographs in periodic medical examination although they could walk.
Two thicker size bearing exchanges were promptly performed before metallosis and loosening of components.
Continual examination is important to mobile bearing type of UKA because slight or less symptoms may disclose such unique dislocation.
One case showed malrotation of the femoral component on 3D image.
Anteroposterior view hardly disclosed the malrotation of the femoral component.
Epicondylar view is an indispensable view of importance, and it can demonstrate the rotation of the femoral component.
The the femoral distal end is wedge shaped and is wider posteriorly.
If the femoral component is set according to the shape of medial condyle, the femoral component shifts to medial site compared with tibial component in flexion.
It can account for such rare dislocation as follows.
If excessive force applies on most medial side of the bearing during flexion, the lateral part of the bearing pops and the force squeezes it laterally simultaneously.
Finally, the bearing jumps onto the lateral wall of the tibial component.
American Psychological Association (APA)
Fujii, Tadashi& Matsui, Yoshio& Noboru, Marehoshi& Inagaki, Yusuke& Kadoya, Yoshinori& Tanaka, Yasuhito. 2015. Meniscal Bearing Dislocation of Unicompartmental Knee Arthroplasty with Faint Symptom. Case Reports in Orthopedics،Vol. 2015, no. 2015, pp.1-5.
https://search.emarefa.net/detail/BIM-1059444
Modern Language Association (MLA)
Fujii, Tadashi…[et al.]. Meniscal Bearing Dislocation of Unicompartmental Knee Arthroplasty with Faint Symptom. Case Reports in Orthopedics No. 2015 (2015), pp.1-5.
https://search.emarefa.net/detail/BIM-1059444
American Medical Association (AMA)
Fujii, Tadashi& Matsui, Yoshio& Noboru, Marehoshi& Inagaki, Yusuke& Kadoya, Yoshinori& Tanaka, Yasuhito. Meniscal Bearing Dislocation of Unicompartmental Knee Arthroplasty with Faint Symptom. Case Reports in Orthopedics. 2015. Vol. 2015, no. 2015, pp.1-5.
https://search.emarefa.net/detail/BIM-1059444
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1059444