scholarly journals Clinical Variability of Landmark Collection in an Imageless Robot-Assisted Total Knee Arthroplasty System

10.29007/4dzm ◽  
2018 ◽  
Author(s):  
Rahul Khare ◽  
Branislav Jaramaz
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Planning Process ◽  
Computer Assisted ◽  
Accurate Identification ◽  
Implant Placement ◽  
Leg Alignment ◽  
Total Knee ◽  
The Impact ◽  
First Time

Use of computer-assisted Total Knee Arthroplasty systems enable more accurate implant placement, better tissue balancing and improved leg alignment. Image-free computer-assisted TKA systems rely on accurate identification of femoral and tibial landmarks to guide the implant planning process. Previously, researchers have studies the variability in collection of these landmark positions and the impact of this variability on the final implant position. Here, for the first time, we present a study assessing the variability of seven landmarks during anonymized clinical cases. Of all the landmarks, we found that there was maximum variability in collection of the femoral anterior notch point.

scholarly journals CAOS Augmented Mechanical Instrumentation Provides Versatility and Improved Accuracy During Total Knee Arthroplasty

10.29007/mq2k ◽  
2020 ◽  
Author(s):  
Jefferson Craig Morrison ◽  
Erika Frazier ◽  
Mary Denton Stumb
Keyword(s):  
Total Knee Arthroplasty ◽  
Length Of Stay ◽  
Knee Arthroplasty ◽  
Weight Bearing ◽  
Computer Assisted ◽  
Surgical Time ◽  
Surgical Workflow ◽  
Leg Alignment ◽  
Total Knee ◽  
The Impact

This study assessed the impact of adding computer-assisted orthopedic surgery (CAOS) augmentation to conventional mechanical instrumentation with regard to the enablement of both mechanical and natural alignment surgical philosophies and accuracy of postoperative alignment for total knee arthroplasty (TKA). Fifty CAOS augmented TKA cases were compared to 101 conventional cases. Data on surgical time, length of stay, and postoperative weight-bearing long leg alignment were collected. The results reported no significant impact on surgical time with incorporation of CAOS augmentation into the conventional surgical workflow, as well as a shorter length of stay and substantial decrease in alignment outliers compared to the conventional TKA cases. The study revealed the advantages of CAOS augmentation in providing a non-disruptive tool to enhance surgical accuracy and offer versatility in accommodating different surgical philosophies during TKA.

Clinical impact of component placement in manually instrumented total knee arthroplasty

2021 ◽  
Vol 103-B (9) ◽  
pp. 1449-1456
Author(s):  
Gregory S. Kazarian ◽  
Elizabeth G. Lieberman ◽  
Erik J. Hansen ◽  
Ryan M. Nunley ◽  
Robert L. Barrack
Keyword(s):  
Systematic Review ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Femoral Rotation ◽  
Limited Evidence ◽  
Implant Placement ◽  
Implant Size ◽  
Total Knee ◽  
Placement Accuracy ◽  
The Impact

Aims The goal of the current systematic review was to assess the impact of implant placement accuracy on outcomes following total knee arthroplasty (TKA). Methods A systematic review was performed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines using the Ovid Medline, Embase, Cochrane Central, and Web of Science databases in order to assess the impact of the patient-reported outcomes measures (PROMs) and implant placement accuracy on outcomes following TKA. Studies assessing the impact of implant alignment, rotation, size, overhang, or condylar offset were included. Study quality was assessed, evidence was graded (one-star: no evidence, two-star: limited evidence, three-star: moderate evidence, four-star: strong evidence), and recommendations were made based on the available evidence. Results A total of 49 studies were identified for inclusion. With respect to PROMs, there was two-star evidence in support of mechanical axis alignment (MAA), femorotibial angle (FTA), femoral coronal angle (FCA), tibial coronal angle (TCA), femoral sagittal angle (FSA), femoral rotation, tibial and combined rotation/mismatch, and implant size/overhang or offset on PROMs, and one-star evidence in support of tibial sagittal angle (TSA), impacting PROMs. With respect to survival, there was three- to four-star evidence in support FTA, FCA, TCA, and TSA, moderate evidence in support of femoral rotation, tibial and combined rotation/mismatch, and limited evidence in support of MAA, FSA, and implant size/overhang or offset impacting survival. Conclusion Overall, there is limited evidence to suggest that PROMs are impacted by the accuracy of implant placement, and malalignment does not appear to be a significant driver of the observed high rates of patient dissatisfaction following TKA. However, FTA, FCA, TCA, TSA, and implant rotation demonstrate a moderate-strong relationship with implant survival. Efforts should be made to improve the accuracy of these parameters in order to improve TKA survival. Cite this article: Bone Joint J 2021;103-B(9):1449–1456.

scholarly journals Higher body mass index is associated with larger postoperative improvement in patient-reported outcomes following total knee arthroplasty

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
K Giesinger ◽  
JM Giesinger ◽  
DF Hamilton ◽  
J Rechsteiner ◽  
A Ladurner
Keyword(s):  
Body Mass Index ◽  
Total Knee Arthroplasty ◽  
Pain Relief ◽  
Body Mass ◽  
Knee Arthroplasty ◽  
Normal Weight ◽  
World Health ◽  
Obese Patients ◽  
Total Knee ◽  
The Impact

Abstract Background Total knee arthroplasty is known to successfully alleviate pain and improve function in endstage knee osteoarthritis. However, there is some controversy with regard to the influence of obesity on clinical benefits after TKA. The aim of this study was to investigate the impact of body mass index (BMI) on improvement in pain, function and general health status following total knee arthroplasty (TKA). Methods A single-centre retrospective analysis of primary TKAs performed between 2006 and 2016 was performed. Data were collected preoperatively and 12-month postoperatively using WOMAC score and EQ-5D. Longitudinal score change was compared across the BMI categories identified by the World Health Organization. Results Data from 1565 patients [mean age 69.1, 62.2% women] were accessed. Weight distribution was: 21.2% BMI < 25.0 kg/m2, 36.9% BMI 25.0–29.9 kg/m2, 27.0% BMI 30.0–34.9 kg/m2, 10.2% BMI 35.0–39.9 kg/m2, and 4.6% BMI ≥ 40.0 kg/m2. All outcome measures improved between preoperative and 12-month follow-up (p < 0.001). In pairwise comparisons against normal weight patients, patients with class I-II obesity showed larger improvement on the WOMAC function and total score. For WOMAC pain improvements were larger for all three obesity classes. Conclusions Post-operative improvement in joint-specific outcomes was larger in obese patients compared to normal weight patients. These findings suggest that obese patients may have the greatest benefits from TKA with regard to function and pain relief one year post-op. Well balanced treatment decisions should fully account for both: Higher benefits in terms of pain relief and function as well as increased potential risks and complications. Trial registration This trial has been registered with the ethics committee of Eastern Switzerland (EKOS; Project-ID: EKOS 2020–00,879)

The Impact of Gastric Bypass Surgery Compared to Total Knee Arthroplasty on Knee Symptoms

2018 ◽  
Vol 04 (02) ◽  
Author(s):  
Hafiz Kassam ◽  
Allan Okrainec ◽  
Timothy Jackson ◽  
Michael G Zyweil ◽  
Anthony V Perruccio ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Gastric Bypass ◽  
Knee Arthroplasty ◽  
Bypass Surgery ◽  
Gastric Bypass Surgery ◽  
Total Knee ◽  
The Impact

Bone ingrowth in total knee arthroplasty: The impact of HA-coatings and the relation with mechanical stability

1998 ◽  
Vol 31 ◽  
pp. 26
Author(s):  
L. Labey ◽  
H. Van Campenhout ◽  
J. Vander Sloten ◽  
R. Van Audekercke ◽  
G. Van der Perre ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Mechanical Stability ◽  
Bone Ingrowth ◽  
Total Knee ◽  
The Impact
Sign in / Sign up

Export Citation Format

Share Document