scholarly journals Component alignment and functional outcome following computer assisted and jig based total knee arthroplasty

2013 ◽  
Vol 47 (1) ◽  
pp. 77 ◽  
Author(s):  
DnyaneshG Lad ◽  
Jai Thilak ◽  
Mohan Thadi
Keyword(s):  
Total Knee Arthroplasty ◽  
Functional Outcome ◽  
Knee Arthroplasty ◽  
Computer Assisted ◽  
Component Alignment ◽  
Total Knee

No effect of obesity on limb and component alignment after computer-assisted total knee arthroplasty

The Knee ◽  
2014 ◽  
Vol 21 (4) ◽  
pp. 862-865 ◽  
Author(s):  
Gautam M. Shetty ◽  
Arun B. Mullaji ◽  
Sagar Bhayde ◽  
A.P. Lingaraju
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Computer Assisted ◽  
Component Alignment ◽  
Total Knee

scholarly journals A study on radiological outcomes of accelerometer based hand held navigation system in total knee arthroplasty

2020 ◽  
Vol 6 (3) ◽  
pp. 556
Author(s):  
Hiranyakumar S. ◽  
Shivaraj Nadagouda ◽  
Vishnu Harikrishnan
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Mechanical Axis ◽  
Patient Specific ◽  
Computer Assisted ◽  
Component Alignment ◽  
Patient Specific Instrumentation ◽  
Wear And Tear ◽  
Total Knee

<p class="abstract"><strong>Background:</strong> The goal of obtaining more accurate component alignment in total knee arthroplasty (TKA) has led to the development of techniques like portable accelerometer-based handheld navigation system, computer assisted system, patient specific instrumentation. Among which hand held navigation has showed promising results for achieving accurate resection and alignment and only few studies were done to assess radiological outcome or the effective component alignment using portable accelerometer-based hand held navigation system in TKA.</p><p class="abstract"><strong>Methods:</strong> TKA using portable accelerometer-based hand held navigation system (Smith and Nephew- knee align) was done on 25 knees with primary osteoarthritis. Preoperative and post-operative mechanical axis and component alignments were measured using hip-to-ankle radiographs.<strong></strong></p><p class="abstract"><strong>Results:</strong> Among the femoral components, 92.0% were placed within 90°±2° to the femoral mechanical axis in the coronal and   96.0% of the tibial components were placed within 90°±2° to the mechanical axis in the coronal plane, 94.3% of the TKAs had an overall lower extremity alignment within 3° of neutral to the mechanical axis, based on postoperative hip-to-ankle radiographs.</p><p class="abstract"><strong>Conclusions:</strong> The degree of accuracy in positioning the femoral and tibial component in TKA using portable accelerometer-based hand held navigation system (knee align) is very much promising and is an effective intraoperative tool for reducing the proportion of outliers for component placement and thus decreasing the chances of instability and early wear and tear of the components in TKA.</p>

scholarly journals Clinical Outcomes of First 100 Navigated Total Knee Arthroplasties at Duke University Medical Center

2014 ◽  
Vol 4 (1) ◽  
pp. 13-18
Author(s):  
Todd E Bertrand
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Medical Center ◽  
Coronal Plane ◽  
Computer Assisted ◽  
Coronal Alignment ◽  
Component Alignment ◽  
Duke University ◽  
Total Knee ◽  
Postoperative Knee

ABSTRACT Background Total knee arthroplasty (TKA) is one of the most clinically successful and cost-effective interventions in medicine. Implant malalignment can be a cause of early failure following total knee arthroplasty. Computer-assisted surgery has been employed to improve the precision of component alignment. Questions/purpose: We asked (1) What is the average coronal plane alignment of the first 100 patients undergoing computer-assisted total knee arthroplasty at our institution? (2) How do our clinical and radiographic results compare to those values reported in the literature? (3) Was a ‘learning curve’ present as evidenced by improvements in coronal plane alignment over time? Methods We retrospectively reviewed our first 100 patients undergoing computer navigated total knee arthroplasty. We calculated postoperative knee range of motion (ROM), coronal alignment as well as preoperative and postoperative Knee Society Scores. Minimum follow-up was 4.3 years (0.2-8.25 years). Results Of the 100 patients, average postoperative limb alignment was 0.9° varus compared to the mechanical axis. Seventy-nine percent of patients had coronal plane alignment of ±3°. Knee Society Scores improved on average from 60 preoperatively (52-67) to 85 postoperatively (56-97). Conclusion Computer-assisted total knee arthroplasty is potentially a way to improve component alignment and overall patient satisfaction. In our cohort, average coronal alignment was similar to literature reported values for navigated and conventional total knee arthroplasty. The benefit of this technology remains unproven. Level of evidence Level IV Bertrand TE, Bolognesi MP. Clinical Outcomes of First 100 Navigated Total Knee Arthroplasties at Duke University Medical Center. The Duke Orthop J 2014;4(1):13-18.

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