scholarly journals Surgical Navigation Improves the Precision and Accuracy of Tibial Component Alignment in Canine Total Knee Replacement

2016 ◽  
Vol 45 (1) ◽  
pp. 52-59 ◽  
Author(s):  
Kaleigh M. Peters ◽  
Erin Hutter ◽  
Robert A. Siston ◽  
Judith Bertran ◽  
Matthew J. Allen
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Tibial Component ◽  
Surgical Navigation ◽  
Component Alignment ◽  
Tibial Component Alignment ◽  
Total Knee ◽  
Precision And Accuracy

DOES NAVIGATION TOTAL KNEE REPLACEMENT REALLY MAKE A DIFFERENCE?

2013 ◽  
Vol 16 (02) ◽  
pp. 1350007
Author(s):  
P. Motwani ◽  
A. Jariwala ◽  
N. Valentine
Keyword(s):  
Total Knee Replacement ◽  
Tibial Component ◽  
Sagittal Plane ◽  
Computer Navigation ◽  
Component Alignment ◽  
Tibial Component Alignment ◽  
Significant Difference ◽  
Total Knee ◽  
The Mean

Background: Computer Navigation in Total Knee Replacement (TKR) has completed more than a decade since its inception. From that time, numerous studies have been done to see its effect on the variables of surgery and its outcome. Some studies have shown that it is definitely beneficial while others have negated its superiority over conventional techniques. This is an early outcome study on the results of navigation TKR in terms of alignment and clinical outcome at three years post-operatively. Methods: In the present study, 128 patients who had undergone navigation TKR (128 TKR) between January 2006 and November 2009 were included. The navigation system used was orthoPilot®. Patients were assessed post-operatively at one and three year using knee society score (KSS) and knee function score (KFS). All patients completed one year follow-up and 55 patients completed three year follow-up. From 128 patients, 40 navigated TKR patients operated between November 2007 and 2009 and were compared with 40 patients operated by conventional TKR operated between July 2007 and December 2008. Results: The mean KSS at 1 year post-operatively was 85.60 and at 3 years was 85.87. The mean KFS at 1 year post-operatively was 69.30 and at 3 years was 68.00. There was no statistically significant difference between navigation TKR and conventional TKR in terms of anatomical femoro-tibial alignment, femoral component alignment in coronal and sagittal plane and tibial component alignment in coronal plane. However, there was statistically significant difference between tibial component alignment in sagittal plane (p = 0.000) between both the groups. Conclusion: Computer navigation TKR affords a possibility to place both the femoral and tibial component very precisely without the risk of any greater axis deviation from ideal value. It helps in reducing the outliers in alignment of the limb and that of component and that improves the overall implant survival for a long time post-operatively.

The dog as a preclinical model to evaluate interface morphology and micro-motion in cemented total knee replacement

2012 ◽  
Vol 25 (01) ◽  
pp. 01-10 ◽  
Author(s):  
M. A. Miller ◽  
M. Khorasani ◽  
K. L. Townsend ◽  
M. J. Allen ◽  
K. A. Mann
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Subchondral Bone ◽  
Tibial Component ◽  
Preclinical Model ◽  
Interface Morphology ◽  
Material Interfaces ◽  
Post Surgery ◽  
Total Knee ◽  
Micro Motion

SummaryObjectives: This study investigated cemented fixation of the tibial component from a canine total knee replacement preclinical model. The objective was to determine the local morphology at the material interfaces (implant, cement, bone) and the local relative micro-motion due to functional loading following in vivo service.Methods: Five skeletally mature research dogs underwent unilateral total knee replacement using a cemented implant system with a polyethylene (PE) monobloc tibial component. Use of the implanted limb was assessed by pressure-sensitive walkway analysis. At 60 weeks post-surgery, the animals were euthanatized and the tibia sectioned en bloc in the sagittal plane to create medial and lateral specimens. High resolution imaging was used to quantify the morphology under the tray and along the keel. Specimens were loaded to 50% body weight and micro-motions at the PE-cement and cement-bone interfaces were quantified.Results: There was significantly (p = 0.002) more cement-bone apposition and interdigitation along the central keel compared to the regions under the tray. Cavitary defects were associated with the perimeters of the implant (60 ± 25%). Interdigitation fraction was negatively correlated with cavitary defect fraction, cement crack fraction, and total micro-motion.Clinical significance: Achieving good inter-digitation of cement into subchondral bone beneath the tibial tray is associated with improved interface morphology and reduced micro-motion; features that could result in a reduced incidence of aseptic loosening. Multiple drill holes distributed over the cut tibial surface and adequate pressurization of the cement into the subchondral bone should improve fixation and reduce interface micro-motion and cavitary defects.

The Effects of Resection Technique on Implant Migration in Single Radius Posterior-Stabilized Total Knee Replacement

2018 ◽  
Vol 33 (01) ◽  
pp. 078-083
Author(s):  
Matthew G. Teeter ◽  
Kevin Perry ◽  
Xunhua Yuan ◽  
James L. Howard ◽  
Brent A. Lanting
Keyword(s):  
Total Knee Replacement ◽  
Femoral Component ◽  
Knee Replacement ◽  
Tibial Component ◽  
Posterior Stabilized ◽  
Gap Balancing ◽  
Measured Resection ◽  
Total Knee ◽  
Single Radius ◽  
Component Migration

AbstractThe purpose of the present study was to measure the effects of gap balancing and resection techniques on migration of a single total knee replacement implant design. A total of 23 patients (24 knees) were recruited on referral to either a surgeon performing gap balancing or a surgeon performing measured resection and followed prospectively. All patients received a fixed bearing, posterior stabilized total knee replacement implant of a single radius femoral component design with cement fixation, and all aspects of care outside of resection technique were identical. Patients underwent radiostereometric analysis (RSA) at 2 weeks (baseline), 6 weeks, 3 months, 6 months, 1 year, and 2 years. Migration of the tibial and femoral components was compared between groups. Tibial component migration was greater at 2 years in the gap balancing group (mean difference = 0.336 mm, p = 0.036), but there was no difference at 1 year. One measured resection and three gap balancing tibial components demonstrated continuous migration > 0.2 mm between years 1 and 2. There was no difference in femoral component migration. Small differences in tibial component migration were found between the gap balancing and measured resection techniques. However, comparing the migration to established predictive thresholds for long-term loosening risk, implants performed with both techniques were found to have equally low revision risk.

scholarly journals Prospective, observational study to evaluate the relation between patient-reported outcomes and component rotation in total knee replacement: protocol for the CRACK study

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e031166
Author(s):  
Hans-Peter van Jonbergen ◽  
Ellie Landman ◽  
Maarten Horst ◽  
Robin Westerbeek ◽  
Ydo Kleinlugtenbelt
Keyword(s):  
Total Knee Replacement ◽  
Clinical Outcomes ◽  
Outcome Measures ◽  
Knee Replacement ◽  
Tibial Component ◽  
Patient Reported Outcomes ◽  
Persistent Pain ◽  
Component Rotation ◽  
Patient Reported ◽  
Total Knee

IntroductionTotal knee replacement (TKR) for osteoarthritis results in a satisfactory outcome in the majority of patients, although up to one in five patients may be dissatisfied with the outcome. Persistent pain is a main contributor to patient dissatisfaction, and femoral and tibial component malrotation have been identified as a potential cause for both persistent pain and patellofemoral problems. Based on the assumption that component malrotation is the causative factor for persistent pain, early revision for patients with symptomatic malrotated components has been advocated in the literature. However, convincing evidence that component malrotation indeed results in less than optimal outcomes is lacking. This study aims to assess the relation between knee prosthesis component rotation and patient-reported outcomes in a large group of patients and to determine the range of femoral, tibial and combined rotation that results in the best clinical outcomes.Methods and analysisIn this single-centre, prospective observational cohort study, a total of 500 patients will undergo TKR. All patients will have a 3D-CT assessment of femoral and tibial component rotation within 8 weeks after surgery. Outcome measures will include the Oxford Knee Score, the Knee Injury and Osteoarthritis Outcome Score, EQ-5D, visual analogue scale for pain, the American Knee Society Score and the knee joint range of motion. We will assess the relation between femoral, tibial and combined component rotation and patient-reported outcome measures at 8 weeks and 1 year of follow-up, and we will determine the range of femoral, tibial and combined rotation that results in the best clinical outcomes.Ethics and disseminationEthical approval for this study has been granted by the Isala Hospital ethics committee. The results will be published in a peer-reviewed journal and presented at relevant meetings.Trial registration numberNL7635.

Improving the accuracy of tibial component placement during total knee replacement in varus knees with tibial bowing: A prospective randomised controlled study

The Knee ◽  
2019 ◽  
Vol 26 (5) ◽  
pp. 1088-1095 ◽  
Author(s):  
Dhanasekararaja Palanisami ◽  
Chirag Parsana Jagdishbhai ◽  
Mithun Manohar ◽  
Pradeep Ramesh ◽  
Rajkumar Natesan ◽  
...  
Keyword(s):  
Total Knee Replacement ◽  
Knee Replacement ◽  
Tibial Component ◽  
Controlled Study ◽  
Component Placement ◽  
Randomised Controlled Study ◽  
Total Knee ◽  
Randomised Controlled

Efficacy of Portable Accelerometer-Based Navigation Devices versus Conventional Guides in Total Knee Arthroplasty: A Meta-analysis

2019 ◽  
Vol 33 (07) ◽  
pp. 691-703 ◽  
Author(s):  
Han Sun ◽  
Shuxiang Li ◽  
Kun Wang ◽  
Guofeng Wu ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Tibial Component ◽  
Operative Time ◽  
Short Form ◽  
Meta Analysis ◽  
Mechanical Alignment ◽  
Knee Score ◽  
Component Alignment ◽  
Posterior Slope ◽  
Tibial Component Alignment ◽  
Total Knee

AbstractVarious studies have provided different conclusions regarding which component's alignment can be actually improved by a novel portable accelerometer-based navigation device (PAD) compared with the conventional guide (CON); the operative times and clinical outcomes reported by these studies also exhibited incongruity. Thus, this meta-analysis was conducted to evaluate the efficacy of PADs in total knee arthroplasty (TKA). The Web of Science, EMBASE, PubMed, MEDLINE, and Cochrane Library databases were systematically searched. Studies published till July 2018 and comparing PAD with CON in treatment with TKA were identified. Sixteen studies in which 1,551 TKAs were reported were included. Results showed that PAD was significantly superior to CON in reducing tibial component alignment out of ±3 degrees, femoral coronal angle out of ±3 degrees, and overall mechanical alignment out of ±3 degrees. PAD can also help obtain a more accurate result of femoral coronal angle (degree); however, it requires a longer operative time than the CON group. The two groups were comparable in tibial component alignment out of ±2 degrees, tibial component posterior slope out of ±3 degrees, tibial component posterior slope out of ±2 degrees, femoral coronal angle out of ±2 degrees, femoral sagittal angle out of ±3 degrees, femoral sagittal angle out of ±2 degrees, tibial component alignment (degree), tibial component posterior slope (degree), femoral sagittal angle (degree), overall mechanical alignment (degree), blood loss, Knee Society knee score, Knee Society function score, Oxford Knee Score, Short Form-36 physical component score, Short Form-36 mental component score, and range of motion. In conclusion, compared with CON, PAD can help improve the femoral coronal angle as well as decrease the outliers out of ±3 degrees in femoral/tibial coronal angles and overall mechanical alignment. However, PAD did not show significant advantages in tibial and femoral component sagittal angles out of ±3 degrees, various outliers of ±2 degrees, most mean values of component alignments, operative time, and various functional or satisfactory scores.

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