Morphological evaluation of the sagittal plane femoral load-bearing surface in computer-simulated virtual total knee arthroplasty implantation at different flexion angles

2016 ◽  
Vol 25 (9) ◽  
pp. 2880-2886 ◽  
Author(s):  
Shichang Chen ◽  
Yiming Zeng ◽  
Mengning Yan ◽  
Bing Yue ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Bearing Surface ◽  
Load Bearing ◽  
Morphological Evaluation ◽  
Total Knee

scholarly journals Accelerometer-Based Navigation in Total Knee Arthroplasty for the Management of Extra-Articular Deformity and Retained Femoral Hardware: Analysis of Component Alignment

Joints ◽  
2019 ◽  
Vol 07 (01) ◽  
pp. 001-007 ◽  
Author(s):  
Andrea Cozzi Lepri ◽  
Matteo Innocenti ◽  
Fabrizio Matassi ◽  
Marco Villano ◽  
Roberto Civinini ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Lower Limb ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Control Group ◽  
Navigation Systems ◽  
Level Of Evidence ◽  
Total Knee

Abstract Purpose Recent advances in total knee arthroplasty (TKA) include an accelerometer portable system designed to improve component position and alignment. The purpose of this study is to evaluate whether accelerometer navigation system can be a valuable option in complex TKAs for extra-articular deformity of the lower limb or in case of retained femoral hardware. Methods A group of 13 patients underwent TKA with an accelerometer navigation system. Three patients had a tibial extra-articular deformity, six had a femoral extra-articular deformity, and four had an intramedullary nail in the femur. Preoperative and postoperative mechanical axes were measured from full-length lower extremity radiographs to evaluate alignment. The alignment of prosthetic components in the frontal and sagittal planes was determined by postoperative radiographs. Results At 30-days postoperative radiographic check, the hip knee ankle angle was within 2.0° (0 ± 1) of the neutral mechanical axis. The alignment of the tibial component on the frontal plane was 90.0° (range 89–91) and on the sagittal plane 5.0° (range 3–7). The alignment of the femoral component on the frontal plane was 90.0° (range 89–91) and on the sagittal plane 3.0° (range 0–5). Conclusion The alignment of the prosthetic components has been accurate and comparable to other navigation systems in literature without any increase in surgical times. The accelerometer-based navigation system is therefore a useful technique that can be used to optimize TKA alignment in patients with extra-articular deformity or with lower limb hardware, where the intramedullary guides cannot be applied. Level of Evidence This is an observational study without a control group, Level III.

Progressive Tibial Bearing Sagittal Plane Conformity in Cruciate-Retaining Total Knee Arthroplasty

2020 ◽  
Author(s):  
John B. Meding ◽  
Lindsey K. Meding ◽  
R. Michael Meneghini ◽  
Robert A. Malinzak
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Cruciate Retaining ◽  
Total Knee

scholarly journals Early changes in sagittal plane knee biomechanics after total knee arthroplasty

2013 ◽  
Vol 21 ◽  
pp. S88-S89
Author(s):  
E.M. Debbi ◽  
B. Bernfeld ◽  
E. Gray ◽  
M. Salai ◽  
Y. Levy ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Knee Biomechanics ◽  
Total Knee

scholarly journals Early Outcomes of an Alternative Bearing Surface in Primary Total Knee Arthroplasty in Patients with Self-reported Metal Allergy

2020 ◽  
Vol 6 (4) ◽  
pp. 639-643
Author(s):  
Jesua I. Law ◽  
Micael J. Morris ◽  
Jason M. Hurst ◽  
Keith R. Berend ◽  
Adolph V. Lombardi ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Primary Total Knee Arthroplasty ◽  
Metal Allergy ◽  
Bearing Surface ◽  
Total Knee ◽  
Primary Total Knee ◽  
Alternative Bearing

Sagittal plane positioning of the femoral component in total knee arthroplasty

1988 ◽  
Vol 3 (4) ◽  
pp. 355-358 ◽  
Author(s):  
Philip M. Faris ◽  
Merrill A. Ritter ◽  
E. Michael Keating
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Total Knee

The Effect of Cement Viscosity in Total Knee Arthroplasty

2012 ◽  
Author(s):  
Kevin Abbruzzese ◽  
Richard O’Laughlin ◽  
Daniel Lee ◽  
D. Gordon Allan ◽  
Manish Paliwal
Keyword(s):  
Total Knee Arthroplasty ◽  
Aseptic Loosening ◽  
Knee Arthroplasty ◽  
Evaluation System ◽  
Sagittal Plane ◽  
Mechanical Tests ◽  
Lateral View ◽  
Superior Performance ◽  
Posterior View ◽  
Total Knee

Aseptic loosening of the tibial implant remains one of the major reasons of failure in Total Knee Arthroplasty (TKA). Currently, there is no consensus on the role that cement viscosity at the time of application to the bone plays in ensuring the long-term success of the arthroplasty. The purpose of this study was to investigate the relationship between cement viscosity and aseptic loosening of tibial implants. Three cements (Depuy 2, Palacos R (high viscosity cements) and Simplex-P, a medium viscosity cement) were compared during TKA through radiographic analysis and mechanical loading tests using surrogate tibia. Cement penetration was measured from radiographs of the constructs and analyzed according to the Knee Society Total Knee Arthroplasty Roentgenographic Evaluation System. Simplex-P had the maximum cumulative penetration in seven zones in the mediolateral view, and three zones in antero-posterior view. Simplex exhibited maximum penetration in zone 7 in the antero-posterior view, and in zone 3 in the lateral view. For the mechanical tests the TKA constructs were subjected to cyclic compressive loading in the sagittal plane. Simplex-P had the smallest micro-motion in sagittal plane, the results were significant when compared to Palacos R. The consistently superior performance of Simplex-P suggests that cement viscosity does indeed play a role in arthroplasty success. These results have direct clinical relevance for TKA patients suffering from aseptic loosening.

scholarly journals Risk factors for a post-operative neutrally aligned total knee arthroplasty in the sagittal plane developing fixed flexion deformity at 2 years follow up study

2019 ◽  
Vol 5 (2) ◽  
pp. 211 ◽  
Author(s):  
Amila Silva ◽  
Sharon Tan ◽  
Adriel Tay ◽  
Hee Nee Pang ◽  
Ngai Nung Lo ◽  
...  
Keyword(s):  
Risk Factors ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
P Value ◽  
Flexion Deformity ◽  
Maximum Flexion ◽  
Total Knee ◽  
Independent Risk Factors ◽  
Fixed Flexion Deformity

<p class="abstract"><strong>Background:</strong> The incidence of fixed flexion deformity (FFD) following total knee arthroplasty (TKA) has been reported to be as high as 17%, increasing demand on the quadriceps and hindering mobility. The aim of this study is then to identify these predictors for the development of FFD.</p><p class="abstract"><strong>Methods:</strong> In this retrospective study, all patients who underwent primary TKA from January 2008 to June 2009 at a single institution were identified. All patients with neutral alignment in the sagittal place of the knee intra-operatively were identified and followed up. The knee motion was measured in both operated and contralateral knees and followed-up for a minimum of 24 months post-operatively.<strong></strong></p><p class="abstract"><strong>Results:</strong> Multivariate analysis demonstrated pre-operative FFD of the non-operated knee (p-value 0.03), pre-operative range of motion of the operated knee (p-value 0.01) and non-operated (p-value 0.01) knee and pre-operative maximum flexion of the operated knee (p-value 0.001) to be independent risk factors for development of FFD at 24 months.</p><p class="abstract"><strong>Conclusions:</strong> Independent risk factors for the development of post-operative FFD in TKA are pre-operative FFD of the operated knee, FFD of the non-operated knee and the maximum flexion of the operated knee. The relative risk of a male developing FFD is also as high as 1.34.</p>

scholarly journals Variability of Sagittal Plane Proximal Tibial Morphology and Its Effect on Stem Placement in Total Knee Arthroplasty

2022 ◽  
Vol 13 ◽  
pp. 55-61
Author(s):  
Eric S. Secrist ◽  
Taylor Rowe ◽  
Katherine K. Li ◽  
Thomas K. Fehring
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Total Knee
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