scholarly journals The unicompartmental knee is the preferred side in individuals with both a unicompartmental and total knee arthroplasty

2019 ◽  
Vol 28 (10) ◽  
pp. 3193-3199 ◽  
Author(s):  
Anatole Vilhelm Wiik ◽  
Dinesh Nathwani ◽  
Ahsan Akhtar ◽  
Bilal Al-Obaidi ◽  
Robin Strachan ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Sagittal Plane ◽  
Coronal Alignment ◽  
Component Alignment ◽  
Posterior Slope ◽  
Knee Oa ◽  
Unicompartmental Knee ◽  
Total Knee

Abstract Purpose To determine the preferred knee in patients with both one total and one unicompartmental knee arthroplasty. Method Patients simply with a unicompartmental (UKA) and total knee arthroplasty (TKA) on contralateral sides were retrospectively screened from three senior knee surgeon’s logs over a 15 year period. Patients safe and free from other diseases to affect gait were approached. A total of 16 patients (mean age 70 ± 8) agreed to ground reaction force testing on an instrumented treadmill at a fair pace and incline. A gender-ratio identical group of 16 healthy control subjects (mean age 67 ± 10) and 16 patients with ipsilateral medial knee OA (mean age 66 ± 7) were analysed to compare. Results Radiographically the mode preoperative Kellgren–Lawrence knee grade for each side was 3. Postoperatively, the TKA side had a mean coronal femoral component alignment of 7° and a mean tibial coronal alignment of 89° with a mean posterior slope of 5° in the sagittal plane. The UKA side had a mean coronal femoral component alignment of 7° and a mean tibial coronal alignment of 86° with a mean posterior slope of 4° in the sagittal plane. In 7 patients, the TKA was the first procedure, while 6 for the UKA and 3 done simultaneously. Gait analysis demonstrated in both walking conditions the UKA limb was the preferred side through all phases of loading (p < 0.05) and nearer to normal than the TKA limb when compared to healthy controls and patients with knee OA. The greatest difference was observed between the transition of weight acceptance and midstance (p = 0.008), when 22% more load was taken by the UKA side. Conclusion By using a dynamic metric of an everyday activity, a distinct gait difference between differing arthroplasty types were established. A more natural loading pattern can be achieved with unicompartmentals as compared to total knees. Level of evidence Retrospective comparative study, Level III.

Navigation-Assisted Total Knee Arthroplasty for a Valgus Knee Improves Limb and Femoral Component Alignment

Orthopedics ◽  
2019 ◽  
Vol 42 (2) ◽  
pp. e253-e259 ◽  
Author(s):  
Sung-Sahn Lee ◽  
Kyeu-Back Kwon ◽  
Yong-In Lee ◽  
Young-Wan Moon
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Valgus Knee ◽  
Component Alignment ◽  
Total Knee

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

scholarly journals Retraction Note: Effect of sagittal femoral component alignment on biomechanics after mobile-bearing total knee arthroplasty

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yong-Gon Koh ◽  
Jin-Ah Lee ◽  
Hwa-Yong Lee ◽  
Dong-Suk Suh ◽  
Hyo-Jeong Kim ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Mobile Bearing ◽  
Component Alignment ◽  
Total Knee ◽  
Retraction Notice

This article has been retracted. Please see the Retraction Notice for more detail: https://doi.org/10.1186/s13018-019-1458-5.

Use of Shorter Intramedullary Guide for Ipsilateral Total Knee Arthroplasty following Prior Total Hip Arthroplasty

2017 ◽  
Vol 31 (04) ◽  
pp. 348-351 ◽  
Author(s):  
Bradley Webb ◽  
Slif Ulrich ◽  
Kenneth MacKinlay ◽  
Langan Smith ◽  
Arthur Malkani
Keyword(s):  
Total Knee Arthroplasty ◽  
Total Hip Arthroplasty ◽  
Femoral Component ◽  
Knee Arthroplasty ◽  
Hip Arthroplasty ◽  
Limb Alignment ◽  
Component Alignment ◽  
Total Hip ◽  
Significant Difference ◽  
Total Knee

AbstractAlignment after total knee arthroplasty (TKA) plays an important role with respect to patient satisfaction and implant survivorship. In patients undergoing ipsilateral TKA with prior total hip arthroplasty (THA), the femoral intramedullary (IM) guide cannot be fully inserted into the femoral canal because of the prior THA. The purpose of this study was to determine the effect of femoral component alignment using a shorter IM guide during TKA in patients with an ipsilateral THA. We identified 42 patients undergoing ipsilateral TKA with the use of a short IM guide in the setting of a prior THA. A matched cohort group was identified from our total joint registry that included 42 patients who underwent primary TKA. The surgical goal was to achieve 5 degrees of valgus on the femoral side and 0 degree on the tibial side with an overall postoperative tibial–femoral angle of 5 degrees of valgus. Patients were evaluated clinically using Knee Society pain scores (KSSs), function scores, and with radiography. Both the tibial–femoral limb alignment and the femoral component alignment were compared using Student's t-test. There were no significant differences between the two groups with respect to sex, age, body mass index (BMI), pre- and postoperative KSSs. There was a statistically significant difference between the two groups with respect to radiographic tibial–femoral limb alignment, 4.33 degrees of valgus in the short stem THA–TKA group versus 5.4 degrees of valgus in the TKA group (p < 0.04); however, this difference did not correlate to a difference in postoperative outcomes. An adequate tibial–femoral component alignment was achieved in patients undergoing ipsilateral TKA with prior THA using a shortened IM femoral guide.

Comparative Study for Alignment of Extramedullary Guides versus Portable, Accelerometer-Based Navigation in Total Knee Arthroplasty

2017 ◽  
Vol 31 (01) ◽  
pp. 092-098 ◽  
Author(s):  
Kazu Matsumoto ◽  
Masashi Fukuta ◽  
Nobuyuki Mori ◽  
Haruhiko Akiyama ◽  
Hiroyasu Ogawa
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Mechanical Axis ◽  
Sagittal Plane ◽  
Sagittal Alignment ◽  
Coronal Alignment ◽  
Technical Improvement ◽  
Primary Tkas ◽  
Total Knee ◽  
Alignment Angle

AbstractThe use of portable, accelerometer-based navigation (PN) devices for positioning of the components of total knee arthroplasty (TKA) is emerging as an alternative to standard extramedullary (EM) systems, which was needed to the image intensifier. The aim of our study was to compare the accuracy of component positioning in TKA using an EM and PN systems. Data from 100 consecutive primary TKAs, performed by multiple surgeons in 87 patients between October 2010 and June 2015, were analyzed. Coronal and sagittal plane alignments of the TKA components, relative to the mechanical axis of the limb, were evaluated by radiography. The mean postoperative coronal alignment angle of the femoral (α) and tibial (β) components was comparable between the groups (α: PN, 89.9 ± 2.2 degrees; EM, 89.9 ± 1.6 degrees and β: PN, 90.1 ± 1.4 degrees; EM, 89.6 ± 1.3 degrees). Groups were also comparable with regard to mean postoperative sagittal alignment angle of the femoral and tibial components (γ: PN, 2.3 ± 3.3 degrees; EM, 1.8 ± 1.7 degrees and σ: PN, 89.7 ± 2.5 degrees; EM, 90.1 ± 1.3 degrees). The incidence rate of a component malalignment > 3 degrees in the coronal and sagittal planes of the mechanical axis of the knee was comparable between the groups. In conclusion, the coronal and sagittal alignments for the femoral components was less accurate compared with tibial component alignment, especially in the PN group, and the sagittal alignment of the femoral component was less accurate than coronal alignment for both groups. Both the PN and EM systems provide satisfactory coronal and sagittal component alignments in TKA. Further technical improvement of the PN system could further improve its application for accurate component implantation in TKAs.

scholarly journals Clinical Outcomes of First 100 Navigated Total Knee Arthroplasties at Duke University Medical Center

2014 ◽  
Vol 4 (1) ◽  
pp. 13-18
Author(s):  
Todd E Bertrand
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Medical Center ◽  
Coronal Plane ◽  
Computer Assisted ◽  
Coronal Alignment ◽  
Component Alignment ◽  
Duke University ◽  
Total Knee ◽  
Postoperative Knee

ABSTRACT Background Total knee arthroplasty (TKA) is one of the most clinically successful and cost-effective interventions in medicine. Implant malalignment can be a cause of early failure following total knee arthroplasty. Computer-assisted surgery has been employed to improve the precision of component alignment. Questions/purpose: We asked (1) What is the average coronal plane alignment of the first 100 patients undergoing computer-assisted total knee arthroplasty at our institution? (2) How do our clinical and radiographic results compare to those values reported in the literature? (3) Was a ‘learning curve’ present as evidenced by improvements in coronal plane alignment over time? Methods We retrospectively reviewed our first 100 patients undergoing computer navigated total knee arthroplasty. We calculated postoperative knee range of motion (ROM), coronal alignment as well as preoperative and postoperative Knee Society Scores. Minimum follow-up was 4.3 years (0.2-8.25 years). Results Of the 100 patients, average postoperative limb alignment was 0.9° varus compared to the mechanical axis. Seventy-nine percent of patients had coronal plane alignment of ±3°. Knee Society Scores improved on average from 60 preoperatively (52-67) to 85 postoperatively (56-97). Conclusion Computer-assisted total knee arthroplasty is potentially a way to improve component alignment and overall patient satisfaction. In our cohort, average coronal alignment was similar to literature reported values for navigated and conventional total knee arthroplasty. The benefit of this technology remains unproven. Level of evidence Level IV Bertrand TE, Bolognesi MP. Clinical Outcomes of First 100 Navigated Total Knee Arthroplasties at Duke University Medical Center. The Duke Orthop J 2014;4(1):13-18.

Sign in / Sign up

Export Citation Format

Share Document