scholarly journals Comparison of Alignment and Prosthesis Positioning Accuracy Between Robotics and Personalized 3D Preoperative Planning in Total Knee Arthroplasty

2021 ◽  
Author(s):  
Kai Lei ◽  
LiMing Liu ◽  
PengFei Yang ◽  
Ran Xiong ◽  
Liu Yang ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Preoperative Planning ◽  
Operation Time ◽  
Consecutive Series ◽  
Clinical Trial Registry ◽  
Tourniquet Time ◽  
Positioning Accuracy ◽  
Total Knee

Abstract Purpose: Lower limb alignment is crucial in total knee arthroplasty (TKA). Previous studies have shown that robotics and personalized three-dimensional (3D) preoperative planning could improve postoperative alignment accuracy compared with conventional TKA, but comparison between the above two techniques has never been reported. The purpose of this study was to compare the alignment and prosthesis positioning accuracy between robotics and personalized 3D preoperative planning in TKA.Methods: A consecutive series of patients who received TKA in our Center from September 2020 to January 2021 were enrolled. After 1:2 matching, 52 and 104 patients were eventually included in robotics group and personalized 3D preoperative planning group, respectively. Multiple postoperative alignment variables, operation time, tourniquet time, length of hospital stay, hemoglobin (Hb) decrease at 1 and 3 days after operation were recorded and compared.Results: Compared with personalized 3D preoperative planning, robotics had significantly lower frontal tibial component (FTC) angle absolute deviation (P<0.001) and less FTC outliers (P<0.05). The postoperative hip-knee-ankle (HKA) angle and frontal femoral component (FFC) angle were different between two groups, while the absolute deviations were similar. Hb decreases of robotics were significantly lower than those of personalized 3D preoperative planning (P<0.001), while the operation time and tourniquet time were longer (P<0.001).Conclusion: Compared with personalized 3D preoperative planning, robotics has more accurate tibial component coronal alignment and less postoperative Hb decrease, while the operation time is significantly longer.Trial registration: The Chinese Clinical Trial Registry, ChiCTR2000036235. Registered 22 August 2020, http://www.chictr.org.cn/showproj.aspx?proj=59300

scholarly journals Demographic data is more predictive of component size than digital radiographic templating in total knee arthroplasty

2020 ◽  
Vol 32 (1) ◽  
Author(s):  
Stephen J. Wallace ◽  
Michael P. Murphy ◽  
Corey J. Schiffman ◽  
William J. Hopkinson ◽  
Nicholas M. Brown
Keyword(s):  
Total Knee Arthroplasty ◽  
Regression Model ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Demographic Data ◽  
Patient Specific ◽  
Consecutive Series ◽  
Level Of Evidence ◽  
Component Size ◽  
Total Knee

Abstract Background Preoperative radiographic templating for total knee arthroplasty (TKA) has been shown to be inaccurate. Patient demographic data, such as gender, height, weight, age, and race, may be more predictive of implanted component size in TKA. Materials and methods A multivariate linear regression model was designed to predict implanted femoral and tibial component size using demographic data along a consecutive series of 201 patients undergoing index TKA. Traditional, two-dimensional, radiographic templating was compared to demographic-based regression predictions on a prospective 181 consecutive patients undergoing index TKA in their ability to accurately predict intraoperative implanted sizes. Surgeons were blinded of any predictions. Results Patient gender, height, weight, age, and ethnicity/race were predictive of implanted TKA component size. The regression model more accurately predicted implanted component size compared to radiographically templated sizes for both the femoral (P = 0.04) and tibial (P < 0.01) components. The regression model exactly predicted femoral and tibial component sizes in 43.7 and 43.7% of cases, was within one size 90.1 and 95.6% of the time, and was within two sizes in every case. Radiographic templating exactly predicted 35.4 and 36.5% of cases, was within one size 86.2 and 85.1% of the time, and varied up to four sizes for both the femoral and tibial components. The regression model averaged within 0.66 and 0.61 sizes, versus 0.81 and 0.81 sizes for radiographic templating for femoral and tibial components. Conclusions A demographic-based regression model was created based on patient-specific demographic data to predict femoral and tibial TKA component sizes. In a prospective patient series, the regression model more accurately and precisely predicted implanted component sizes compared to radiographic templating. Level of evidence Prospective cohort, level II.

Varus alignment of the tibial component up to seven degrees is not associated with poor long-term outcomes in a neutrally aligned total knee arthroplasty

2021 ◽  
Author(s):  
Francisco Antonio Miralles-Muñoz ◽  
Marta Rubio-Morales ◽  
Laiz Bello-Tejada ◽  
Santiago González-Parreño ◽  
Alejandro Lizaur-Utrilla ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Varus Alignment ◽  
Long Term Outcomes ◽  
Total Knee

Tibial Cut Accuracy in Mechanically Aligned Total Knee Arthroplasty Using Extensor Hallucis Longus Tendon to Determine Extramedullary Tibial Guide Position

2021 ◽  
Author(s):  
Pablo Besa ◽  
Rafael Vega ◽  
Gerardo Ledermann ◽  
Claudio Calvo ◽  
Manuela Angulo ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Lower Extremity ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Anatomical Landmark ◽  
Mechanical Alignment ◽  
Longus Tendon ◽  
Extensor Hallucis Longus ◽  
Tibial Cut ◽  
Total Knee

AbstractThis study aimed to determine the tibial cut (TC) accuracy using extensor hallucis longus (EHL) tendon as an anatomical landmark to position the total knee arthroplasty (TKA) extramedullary tibial guide (EMTG), and its impact on the TKA mechanical alignment (MA). We retrospectively studied 96 TKA, performed by a single surgeon, using a femoral tailored intramedullary guide technique. Seventeen were prior to the use of the EHL and 79 used the EHL tendon to position the EMTG. We analyzed preoperative and postoperative standing total lower extremity radiographs to determine the tibial component angle (TCA) and the correction in MA, comparing pre-EHL use and post-EHL technique incorporation. Mean TCA was 88.89 degrees and postoperative MA was neutral in 81% of patients. Pre- and postoperative MAs were not correlated. As a conclusion of this study, using the EHL provides a safe and easy way to determine the position of EMTG.

Effect of tibial component varus on wear in total knee arthroplasty

The Knee ◽  
2012 ◽  
Vol 19 (5) ◽  
pp. 560-563 ◽  
Author(s):  
Ajay Srivastava ◽  
Gregory Y. Lee ◽  
Nikolai Steklov ◽  
Clifford W. Colwell ◽  
Kace A. Ezzet ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Total Knee

Experience Influences the Agreement and Reliability of Tibial Component Positioning in Total Knee Arthroplasty

2018 ◽  
Vol 33 (4) ◽  
pp. 1231-1234 ◽  
Author(s):  
Derek F. Amanatullah ◽  
Graham D. Pallante ◽  
Matthieu P. Ollivier ◽  
Alexander W. Hooke ◽  
Matthew P. Abdel ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Total Knee

scholarly journals MAFbx, MuRF1, and the stress-activated protein kinases are upregulated in muscle cells during total knee arthroplasty

2012 ◽  
Vol 303 (4) ◽  
pp. R376-R386 ◽  
Author(s):  
Ashley N. Bailey ◽  
Austin D. Hocker ◽  
Benjamin R. Vermillion ◽  
Keith Smolkowski ◽  
Steven N. Shah ◽  
...  
Keyword(s):  
Older Adults ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Muscle Protein ◽  
Vastus Lateralis ◽  
Cost Effective ◽  
Mrna Levels ◽  
Tourniquet Time ◽  
Total Knee ◽  
Expanding Population

Total knee arthroplasty (TKA) is the most common and a cost-effective surgical remediation for older adults with long-standing osteoarthritis. In parallel with the expanding population of older adults, the number of TKAs performed annually is projected to be 3.48 million by 2030. During this surgery, a tourniquet is used to stop blood flow to the operative leg. However, the molecular pathways that are affected by tourniquet use during TKA continue to be elucidated. We hypothesized that components of the catabolic FoxO3a (i.e., MuRF1, MAFbx, and Bnip3) pathway, as well as the cellular stress pathways [i.e., stress-activated protein kinase (SAPK)/JNK and MAPKs], are upregulated during TKA. The purpose of this study was to measure changes in transcripts and proteins involved in muscle cell catabolic and stress-activated pathways. We obtained muscle biopsies from subjects, 70 ± 1.3 yr, during TKA, from the vastus lateralis at baseline (before tourniquet inflation), during maximal ischemia (just before tourniquet release), and during reperfusion. Total tourniquet time was 43 ± 2 min and reperfusion time was 16 ± 1. Significant increases in FoxO3a downstream targets, MAFbx and MuRF1, were present for mRNA levels during ischemia (MAFbx, P = 0.04; MuRF1, P = 0.04), and protein expression during ischemia (MAFbx, P = 0.002; MuRF1, P = 0.001) and reperfusion (MuRF1, P = 0.002). Additionally, stress-activated JNK gene expression ( P = 0.01) and protein were elevated during ischemia ( P = 0.001). The results of this study support our hypothesis that protein degradation pathways are stimulated during TKA. Muscle protein catabolism is likely to play a role in the rapid loss of muscle volume measured within 2 wk of this surgery.

Underhang of the tibial component increases tibial bone resorption after total knee arthroplasty

2018 ◽  
Vol 27 (4) ◽  
pp. 1270-1279 ◽  
Author(s):  
ShiZhong Gu ◽  
Shinichi Kuriyama ◽  
Shinichiro Nakamura ◽  
Kohei Nishitani ◽  
Hiromu Ito ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Bone Resorption ◽  
Knee Arthroplasty ◽  
Tibial Component ◽  
Tibial Bone ◽  
Total Knee

scholarly journals Slight femoral under-correction versus neutral alignment in total knee arthroplasty with preoperative varus knees: a comparative study

Arthroplasty ◽  
2022 ◽  
Vol 4 (1) ◽  
Author(s):  
Kai Lei ◽  
Li-Ming Liu ◽  
Peng-Fei Yang ◽  
Ran Xiong ◽  
De-Jie Fu ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Operative Time ◽  
Length Of Hospital Stay ◽  
Clinical Results ◽  
Patient Reported Outcome Measures ◽  
Tourniquet Time ◽  
Patient Reported ◽  
Total Knee ◽  
Neutral Alignment

Abstract Background This study aimed to compare the short-term clinical results of slight femoral under-correction with neutral alignment in patients with preoperative varus knees who underwent total knee arthroplasty. Methods The medical records and imaging data were retrospectively collected from patients who had undergone total knee arthroplasty in our hospital from January 2016 to June 2019. All patients had varus knees preoperatively. Upon 1:1 propensity score matching, 256 patients (256 knees) were chosen and divided into a neutral alignment group (n=128) and an under-correction group (n=128). The patients in the neutral group were treated with the neutral alignment. In the under-correction group, the femoral mechanical axis had a 2° under-correction. The operative time, tourniquet time and the length of hospital stay in the two groups were recorded. The postoperative hip-knee-ankle angle, frontal femoral component angle and frontal tibial component angle were measured. Patient-reported outcome measures were also compared. Results The operative time, tourniquet time and the length of hospital stay in the under-correction group were significantly shorter than the neutral alignment group (P<0.05). At the 2-year follow-up, the under-correction group had a larger varus alignment (P<0.05) and a larger frontal femoral component angle (P<0.05), and the frontal tibial component angles of the two groups were comparable. Compared with the neutral alignment group, the slight femoral under-correction group had significantly better patient-reported outcome measures scores (P<0.05). Conclusion For varus knees treated with total knee arthroplasty, alignment with a slight femoral under-correction has advantages over the neutral alignment in terms of the shorter operative time and better short-term clinical results. Level of evidence III

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