Mechanical, Anatomical, and Kinematic Axis in TKA: Concepts and Practical Applications
Jeffrey J. Cherian,Bhaveen H. Kapadia,Samik Banerjee,Julio J. Jauregui,Kimona Issa,Michael A. Mont +5 more
TLDR
This report has reviewed and analyzed recent reports concerning mechanical, anatomic, and kinematic axis/alignment schemes used in total knee arthroplasty.Abstract:
Successful total knee arthroplasty (TKA) has often been based on the restoration of the knee to neutral alignment postoperatively. Numerous reports have linked malaligned TKA components to increased wear, poor functional outcomes, and failure. There have been many different alignment philosophies and surgical techniques that have been established to attain the goal of proper alignment, which includes such techniques as computerized navigation, and custom cutting guides. In addition, these methods could potentially have the added benefit of leading to improved functional outcomes following total knee arthroplasty. In this report, we have reviewed and analyzed recent reports concerning mechanical, anatomic, and kinematic axis/alignment schemes used in total knee arthroplasty.read more
Citations
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Navigation improves accuracy of rotational alignment in total knee arthroplasty
TL;DR: In this paper, a prospective randomized study was designed to test whether an optical navigation system for total knee arthroplasty achieved greater implantation precision than a non-navigated technique.
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The Impact of Mechanical and Restricted Kinematic Alignment on Knee Anatomy in Total Knee Arthroplasty
Abdulaziz M. Almaawi,Jonathan R. B. Hutt,Vincent Massé,Martin Lavigne,Pascal-André Vendittoli +4 more
TL;DR: The proposed restricted KA protocol provides an interesting hybrid option between MA and true KA, and leads to greater modifications of knee joint anatomy.
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Patient Satisfaction Outcomes after Robotic Arm-Assisted Total Knee Arthroplasty: A Short-Term Evaluation
Robert C. Marchand,Nipun Sodhi,Anton Khlopas,Assem A Sultan,Steven F. Harwin,Arthur L. Malkani,Michael A. Mont +6 more
TL;DR: Patients who undergo RATKA can expect better short-term outcomes when compared with patients who undergo manual total knee arthroplasty, and the results from this study further highlight the potential of this new surgical tool to improve short‐term pain, physical function, and total satisfaction scores.
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Kinematic TKA using navigation: Surgical technique and initial results.
TL;DR: Computer navigation for kinematic TKA provides the operating surgeon with full control and feedback at each step, whilst also allowing partial correction of more extreme anatomy that might be unsuitable for recreation during TKA.
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Bone morphotypes of the varus and valgus knee
TL;DR: Bone morphology in varus and valgus deformity is different before and after osteoarthritis, and clinical importance of bone morphotype analysis is that it shows the intra-articular potential of alignment correction when mechanical axis cuts are performed.
References
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Patient Satisfaction after Total Knee Arthroplasty: Who is Satisfied and Who is Not?
TL;DR: A cross-sectional study of patient satisfaction after 1703 primary TKAs performed in the province of Ontario confirmed that approximately one in five (19%) primary TKA patients were not satisfied with the outcome.
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Coronal alignment after total knee replacement
TL;DR: A series of 115 Denham knee replacements performed between 1976 and 1981 using the earliest design of components, inserted with intramedullary guide rods is reported, finding accurate coronal alignment appears to be an important factor in prevention of loosening.
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Radiographic analysis of the axial alignment of the lower extremity.
TL;DR: The axial alignment of the lower extremities of twenty-five normal male volunteers whose mean age was thirty years was studied using a standardized radiograph of the entire lower extremity and the anatomical axis of the femur did not pass through the center of the knee.
Journal Article
Proximal tibial osteotomy for osteoarthritis with varus deformity. A ten to thirteen-year follow-up study.
TL;DR: P proximal tibial osteotomy is a very suitable operation for patients who have gonarthrosis of the medial compartment, but a rigidly standardized and precise operative technique is required as well as accurate radiographic measurements of the mechanical axis of the limb, because exact postoperative alignment is the prerequisite for the longest possible period of relief of symptoms after osteotomy.
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Total knee arthroplasty.
TL;DR: Patellar complications such as fatigue fracture of the patellar bone now constitute the majority of problems following total knee arthroplasty; new methods will have to prove themselves against the standard already established for cemented prostheses.