Does lateral versus medial exposure influence total knee tibial component final external rotation? A CT based study.

Introduction: A previous study demonstrated that performing a total knee arthroplasty through a lateral approach including anterior tibial tuberosity (ATT) osteotomy (refixed in its original position) presented numerous advantages: correcting the preoperative patella lateral tilt and improving postoperative patella tracking. We hypothesized that these improvements in patella centering were, at least in part, due to an increased external rotation of the tibial component. Postoperative scannographic studies were, therefore, undertaken to measure tibial component rotation and analyze the results according the medial and lateral exposure used.

Distal femur rotational alignment and patellar subluxation: a CT scan in vivo assessment.

Background: Patellofemoral instability following total knee arthroplasty is a very common complication which may result from a defective rotational positioning of the femoral component. However, rotational landmarks for optimal orientation are not unequivocal. Moreover, no proven correlation has yet been established between preexisting rotational malposition and patellofemoral instability occurrence.

[Rotational alignment of femoral component with computed-assisted surgery (CAS) during total knee arthroplasty].

Introduction: Accurate implantation of the prosthesis components is a prognostic factor for long-term total knee arthroplasty survival as it reduces wear and loosening failure. Computer-assisted navigation systems have proved to produce accurate bone cuts orthogonal to the mechanical axis. Proper rotational alignment of the femoral component is one of the requirements for optimal positioning of the femoral prosthesis.

[Distal femoral torsion: comparison of CT scan and intra operative navigation measurements during total knee arthroplasty. A report of 70 cases].

Introduction: Proper positioning of the prosthesis components in total knee arthroplasty is an important factor for satisfactory outcomes such as mobility, pain and wear. If an independent cutting technique is performed, rotational alignment of the femoral component should adapt patient's specific anatomy. The distal epiphyseal femoral torsion (DEFT) is adjusted in order to align the prosthetic posterior condylar axis along the bone transepicondylar axis.

Cartilage thickness matching of selected donor and recipient sites for osteochondral autografting of the medial femoral condyle.

Osteochondral transplantation requires a careful assessment of the location of donor plugs. A mismatch of cartilage thickness between the donor and recipient site may lead to abnormal stresses and poor function. The objective of this study was to characterize the recommended donor and recipient sites with respect to cartilage thickness in younger individuals.