Imperial College London
Alternate

DrSimonHarris

Faculty of Medicine, Department of Surgery & Cancer

Research Associate
 
 
 
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Contact

 

+44 (0)20 7594 3649s.harris

 
 
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Location

 

216Sir Michael Uren HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rivière:2018:10.1016/j.otsr.2018.05.010,
author = {Rivière, C and Dhaif, F and Shah, H and Ali, A and Auvinet, E and Aframian, A and Cobb, J and Howell, S and Harris, S},
doi = {10.1016/j.otsr.2018.05.010},
journal = {Orthopaedics and Traumatology: Surgery and Research},
pages = {983--995},
title = {Kinematic alignment of current TKA implants does not restore the native trochlear anatomy},
url = {http://dx.doi.org/10.1016/j.otsr.2018.05.010},
volume = {104},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - INTRODUCTION: Preserving constitutional patellofemoral anatomy, and thus producing physiological patellofemoral kinematics, could prevent patellofemoral complications and improve clinical outcomes after kinematically aligned TKA (KA TKA). Our study aims 1) to compare the native and prosthetic trochleae (planned or implanted), and 2) to estimate the safety of implanting a larger Persona® femoral component size matching the proximal lateral trochlea facet height (flange area) in order to reduce the native articular surfaces understuffing generated by the prosthetic KA trochlea. METHODS: Persona® femoral component 3D model was virtually kinematically aligned on 3D bone-cartilage models of healthy knees by using a conventional KA technique (group 1, 36 models, planned KA TKA) or an alternative KA technique (AT KA TKA) aiming to match the proximal (flange area) lateral facet height (10 models, planned AT KA TKA). Also, 13 postoperative bone-implant (KA Persona®) models were co-registered to the same coordinate geometry as their preoperative bone-cartilage models (group 2 - implanted KA TKA). In-house analysis software was used to compare native and prosthetic trochlea articular surfaces and medio-lateral implant overhangs for every group. RESULTS: The planned and performed prosthetic trochleae were similar and valgus oriented (6.1° and 8.5°, respectively), substantially proximally understuffed compared to the native trochlea. The AT KA TKAs shows a high rate of native trochlea surface overstuffing (70%, 90%, and 100% for lateral facet, groove, medial facet) and mediolateral implant overhang (60%). There was no overstuffing with conventional KA TKAs having their anterior femoral cut flush. CONCLUSION: We found that with both the planned and implanted femoral components, the KA Persona® trochlea was more valgus oriented and understuffed compared to the native trochlear anatomy. In addition, restoring the lateral trochlea facet height by increasing t
AU  - Rivière,C
AU  - Dhaif,F
AU  - Shah,H
AU  - Ali,A
AU  - Auvinet,E
AU  - Aframian,A
AU  - Cobb,J
AU  - Howell,S
AU  - Harris,S
DO  - 10.1016/j.otsr.2018.05.010
EP  - 995
PY  - 2018///
SN  - 1877-0568
SP  - 983
TI  - Kinematic alignment of current TKA implants does not restore the native trochlear anatomy
T2  - Orthopaedics and Traumatology: Surgery and Research
UR  - http://dx.doi.org/10.1016/j.otsr.2018.05.010
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29960090
UR  - https://www.sciencedirect.com/science/article/pii/S1877056818301737?via%3Dihub
UR  - http://hdl.handle.net/10044/1/61450
VL  - 104
ER  -
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