scholarly journals Custom total knee arthroplasty facilitates restoration of constitutional coronal alignment

2020 ◽  
Author(s):  
Michel P. Bonnin ◽  
Lucas Beckers ◽  
Augustin Leon ◽  
Jules Chauveau ◽  
Jacobus H. Müller ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Coronal Alignment ◽  
Total Knee

The Adjustment of the Rotational Alignment of the Distal End of the Extramedullary Guide to the Anteroposterior Axis of the Proximal Tibia in Total Knee Arthroplasty

2021 ◽  
Author(s):  
Hideki Mizu-uchi ◽  
Hidehiko Kido ◽  
Tomonao Chikama ◽  
Kenta Kamo ◽  
Satoshi Kido ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Proximal Tibia ◽  
Rotational Alignment ◽  
Coronal Alignment ◽  
Ideal Position ◽  
Total Knee ◽  
Alignment Guide ◽  
The Ideal

AbstractThe optimal placement within 3 degrees in coronal alignment was reportedly achieved in only 60 to 80% of patients when using an extramedullary alignment guide for the tibial side in total knee arthroplasty (TKA). This probably occurs because the extramedullary alignment guide is easily affected by the position of the ankle joint which is difficult to define by tibial torsion. Rotational direction of distal end of the extramedullary guide should be aligned to the anteroposterior (AP) axis of the proximal tibia to acquire optimal coronal alignment in the computer simulation studies; however, its efficacy has not been proven in a clinical setting. The distal end of the guide can be overly displaced from the ideal position when using a conventional guide system despite the alignment of the AP axis to the proximal tibia. This study investigated the effect of displacement of the distal end of extramedullary guide relative to the tibial coronal alignment while adjusting the rotational alignment of the distal end to the AP axis of the proximal tibia in TKA. A total of 50 TKAs performed in 50 varus osteoarthritic knees using an image-free navigation system were included in this study. The rotational alignment of the proximal side of the guide was adjusted to the AP axis of the proximal tibia. The position of the distal end of the guide was aligned to the center of the ankle joint as viewed from the proximal AP axis (ideal position) and as determined by the navigation system. The tibial intraoperative coronal alignments were recorded as the distal end was moved from the ideal position at 3-mm intervals. The intraoperative alignments were 0.5, 0.9, and 1.4 degrees in valgus alignment with 3-, 6-, and 9-mm medial displacements, respectively. The intraoperative alignments were 0.7, 1.2, and 1.7 degrees in varus alignment with 3-, 6-, and 9-mm lateral displacements, respectively. In conclusion, the acceptable tibial coronal alignment (within 2 degrees from the optimal alignment) can be achieved, although some displacement of the distal end from the ideal position can occur after the rotational alignment of the distal end of the guide is adjusted to the AP axis of the proximal tibia.

scholarly journals Improving Tibial Component Coronal Alignment During Total Knee Arthroplasty with the Use of a Double‐Check Technique

2019 ◽  
Vol 11 (6) ◽  
pp. 1013-1019 ◽  
Author(s):  
De‐si Ma ◽  
Zhi‐wei Wang ◽  
Liang Wen ◽  
Shi‐xiang Ren ◽  
Yuan Lin ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Coronal Alignment ◽  
Total Knee

Extramedullary Guide Alignment Is not Affected by Obesity in Primary Total Knee Arthroplasty

2020 ◽  
Author(s):  
Jocelyn Compton ◽  
Jessell Owens ◽  
Jesse Otero ◽  
Nicolas Noiseux ◽  
Timothy Brown
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Primary Total Knee Arthroplasty ◽  
Coronal Plane ◽  
Coronal Alignment ◽  
Primary Tkas ◽  
Significant Difference ◽  
Total Knee ◽  
Valgus Alignment

AbstractCoronal alignment of the tibial implant correlates with survivorship of total knee arthroplasty (TKA), especially in obese patients. The purpose of this study was to determine if obesity affects coronal plane alignment of the tibial component when utilizing standard extramedullary tibial guide instrumentation during primary TKA. A retrospective review from June 2017 to February 2018 identified 142 patients (162 primary TKAs). There were 88 patients (100 knees) with body mass index (BMI) < 35 kg/m2 and 54 patients (62 knees) with BMI ≥ 35.0 kg/m2. The cohorts did not differ in age (p = 0.37), gender (p = 0.61), or Charlson's comorbidity index (p = 0.54). Four independent reviewers measured the angle between the base of the tibial component and the mechanical axis of the tibia on the anteroposterior view of long-leg film at first postoperative clinic visit. Outliers were defined as patients with greater than 5 degrees of varus or valgus alignment (n = 0). Reoperations and complications were recorded to 90 days postoperatively. There was no significant difference in mean tibial coronal alignment between the two groups (control alignment 90.8 ± 1.2 degree versus obese alignment 90.8 ± 1.2 degree, p = 0.91). There was no difference in varus versus valgus alignment (p = 0.19). There was no difference in the number of outliers (two in each group, p = 0.73). There was no difference in rate of reoperation (p = 1.0) or complication (p = 0.51). Obesity did not affect coronal plane alignment of the tibial component when using an extramedullary guide during primary TKA in our population.

Measurement of rotational and coronal alignment in total knee arthroplasty using a navigation system is reproducible

2016 ◽  
Vol 136 (2) ◽  
pp. 271-276 ◽  
Author(s):  
Keizo Wada ◽  
Hiroshi Mikami ◽  
Daisuke Hamada ◽  
Hiroshi Yonezu ◽  
Koichi Oba ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Coronal Alignment ◽  
Total Knee

scholarly journals Non-weight-bearing short knee radiographs to evaluate coronal alignment before total knee arthroplasty

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Sheng Pan ◽  
Chaoran Huang ◽  
Xingchen Zhang ◽  
Ruxin Ruan ◽  
Ziwen Yan ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Weight Bearing ◽  
Coronal Alignment ◽  
Total Knee
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