Study on implant stability in cementless total knee arthroplasty.
OBJECTIVE
Determine the stability of tibial and femoral components of 20 cementless knee arthroplasties with rotating platform.


METHODS
The 20 patients (20 knees) underwent an analysis of dynamic radiographs with an image amplifier and maneuvers of varus and valgus which were compared to static frontal and lateral radiographs of the knees and analyzed by two experienced surgeons in a double-blind way.


RESULTS
We could observe in this study that both methods showed very similar results for the stability of the tibial and femoral components (p<0.001) using the Kappa method for comparison.


CONCLUSIONS
The tibial component was more unstable in relation to the femoral component in both static and dynamic studies. Level of Evidence IV, Case Series.
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
Luís Eduardo Passarelli
LE
Tírico
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
Thiago
T
Pasqualin
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
José Otávio
JO
Pécora
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
Riccardo Gomes
RG
Gobbi
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
José Ricardo
JR
Pécora
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo.
Marco Kawamura
MK
Demange
Biomechanics; Knee arthroplasty; Knee osteoarthritis; Knee prosthesis