Hy-Flex II Total Knee and Ligament Balancing System: Preliminary Report on Concept, Design, Surgical Technique, and Short-Term Clinical results

1999 ◽  
pp. 402-407
Author(s):  
Shinichi Yoshino ◽  
Hiroshi Nakamura ◽  
Masakazu Nagashima ◽  
Hiroo Shiga ◽  
Akitoshi Tachihara
Keyword(s):  
Surgical Technique ◽  
Preliminary Report ◽  
Clinical Results ◽  
Concept Design ◽  
Short Term ◽  
Ligament Balancing ◽  
Total Knee

Keio Total Knee Arthroplasty: Concept, Design, and Clinical Results

1988 ◽  
pp. 83-91
Author(s):  
F. Iseki ◽  
T. Takeda ◽  
K. Fujikawa
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Concept Design ◽  
Total Knee

Short-Term Clinical Results of Porous Tantalum Monoblock Patella in Total Knee Arthroplasty: Analysis of Two-Dimensionally Osteomorphometry

2015 ◽  
Vol 3 (1) ◽  
pp. 8-13
Author(s):  
Takao Kaneko ◽  
◽  
Takahiro Otani ◽  
Hideaki Ishii ◽  
Nobuhito Nango ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Short Term ◽  
Porous Tantalum ◽  
Total Knee

scholarly journals Better Short-term Function After Unicompartmental Compared to Total Knee Arthroplasty

2020 ◽  
Author(s):  
Eric Tille ◽  
Franziska Beyer ◽  
Kai Auerbach ◽  
Marco Tinius ◽  
Jörg Lützner
Keyword(s):  
Total Knee Arthroplasty ◽  
Treatment Option ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Matched Pair ◽  
Short Term ◽  
Patient’S Satisfaction ◽  
Patient Reported ◽  
Total Knee ◽  
Matching Criteria

Abstract BackgroundUnicompartmental knee arthroplasty (UKA) is an established treatment option for patients with unicompartmental osteoarthritis (OA). However, strict patient selection is crucial for its success. The proposed advantages include nearly natural knee kinematics, faster rehabilitation and better functional outcomes. Despite these facts and it’s proven cost-effectiveness, there are hesitations for the use of UKA as an alternative to total knee arthroplasty (TKA). Key objectives of this study were therefore to assess clinical and patient-reported-outcome (PRO) as well as patient’s satisfaction after medial UKA in comparison to TKA. MethodsTo assess the outcome after UKA we conducted a prospective multi-center study. 116 patients with unicompartmental OA and indication for UKA were included. Overall 54 females and 62 males with an average age of 62.7 years (±9.8) and an average body mass index (BMI) of 29.2 (± 3.7) were recruited. Clinical results and PRO were assessed using the Knee Society Score (KSS). Follow-ups took place 3 months, 1 and 2 years after surgery including clinical examination, radiographs, assessment of PRO and adverse events. Pain and satisfaction were evaluated using a visual analog scale (VAS, 0 (worst) to 10 (best)).For comparison with TKA a propensity score matched-pair analysis was performed to eliminate confounders. Matching criteria were gender, patient´s age, BMI and comorbidities. A total of 116 matched-pairs were analysed. ResultsThere was no revision in the UKA group until 2 years after surgery. Revision rates were higher in the TKA group (0.6%).Preoperative KSS-Scores were higher within the UKA cohort (p < 0.001). After surgical treatment, PROMs displayed a significant improvement (p < 0,001) in both cohorts. Regarding the Knee-Score (Pain, Alignment, ROM) we observed no differences between cohorts after 12 months. The Function-Score demonstrated significantly better results in the UKA cohort (UKA vs. TKA 95 vs 80, p < 0.001). Patient satisfaction was higher in UKA patients (UKA vs TKA 9.0 vs 8.8, p = 0.019).ConclusionPatients of both cohorts showed high satisfaction after knee arthroplasty. UKA resulted in higher function scores compared to TKA without increased revision rate during short-term follow-up. Therefore, UKA is a good treatment option for unicompartmental OA. Trial registrationClinicaltrials.gov, NCT04598568. Registered 22 October 2020 - Retrospectively registered, https://www.clinicaltrials.gov/ct2/show/record/NCT04598568?cond=balanSys+Uni&draw=2&rank=1

Comparision of Fixed-Bearing and Mobile-Bearing Total Knee Arthroplasties: Short-Term Clinical Results

2015 ◽  
Vol 3 (2) ◽  
Author(s):  
Burak Kaymaz ◽  
Cihan Sevinçhan ◽  
Umut Hatay Gölge ◽  
Gurdal Nusran ◽  
Ferdi Göksel ◽  
...  
Keyword(s):  
Mobile Bearing ◽  
Clinical Results ◽  
Total Knee Arthroplasties ◽  
Fixed Bearing ◽  
Short Term ◽  
Total Knee

scholarly journals Better short-term function after unicompartmental compared to total knee arthroplasty

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Eric Tille ◽  
Franziska Beyer ◽  
Kai Auerbach ◽  
Marco Tinius ◽  
Jörg Lützner
Keyword(s):  
Total Knee Arthroplasty ◽  
Treatment Option ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Matched Pair ◽  
Short Term ◽  
Patient’S Satisfaction ◽  
Patient Reported ◽  
Total Knee ◽  
Matching Criteria

Abstract Background Unicompartmental knee arthroplasty (UKA) is an established treatment option for patients with unicompartmental osteoarthritis (OA). However, strict patient selection is crucial for its success. The proposed advantages include nearly natural knee kinematics, faster rehabilitation and better functional outcomes. Despite the aforementioned facts and it’s proven cost-effectiveness, there are still hesitations for the use of UKA as an alternative to total knee arthroplasty (TKA). Key objectives of this study were therefore to assess clinical and patient-reported outcome (PRO) as well as patient’s satisfaction after medial UKA in comparison to TKA. Methods To assess the outcome after UKA we conducted a prospective multi-center study. 116 patients with unicompartmental OA and indication for UKA were included. Overall 54 females and 62 males with an average age of 62.7 years (±9.8) and an average body mass index (BMI) of 29.2 (± 3.7) were recruited. Clinical results and PRO were assessed using the Knee Society Score (KSS). Follow-ups took place 3 months, 1 and 2 years after surgery including clinical examination, radiographs, assessment of PRO and adverse events. Pain and satisfaction was evaluated using a visual analog scale (VAS, 0 (worst) to 10 (best)). For comparison with TKA a propensity score matched-pair analysis was performed to eliminate confounders. Matching criteria were gender, patient’s age, BMI and comorbidities. A total of 116 matched-pairs were analysed. Results There was no revision in the UKA group until 2 years after surgery. Revision rates were higher in the TKA group (0.6%). Preoperative KSS-Scores were higher within the UKA cohort (p <  0.001). After surgical treatment, PROMs displayed a significant improvement (p <  0,001) in both cohorts. Regarding the Knee-Score (Pain, Alignment, ROM) we observed no differences between cohorts after 12 months. The Function-Score demonstrated significantly better results in the UKA cohort (UKA vs. TKA 95 vs 80, p <  0.001). Patient satisfaction was also higher in UKA patients (UKA vs TKA 9.0 vs 8.8, p = 0.019). Conclusion Patients of both cohorts showed high satisfaction after knee arthroplasty. UKA resulted in higher function scores compared to TKA without increased revision rate during short-term follow-up. Therefore, UKA is a good treatment option for unicompartmental OA. Trial registration Clinicaltrials.gov, NCT04598568. Registered 22 October 2020 - Retrospectively registered.

Spacer-Based Gap Balancing in Total Knee Arthroplasty: Clinical Success with a Reproducible Technique

2017 ◽  
Vol 30 (08) ◽  
pp. 798-806 ◽  
Author(s):  
Frédéric Lavoie
Keyword(s):  
Total Knee Arthroplasty ◽  
Surgical Technique ◽  
Knee Arthroplasty ◽  
Clinical Success ◽  
Postoperative Outcome ◽  
Trochlear Groove ◽  
Ligament Balancing ◽  
Gap Balancing ◽  
Total Knee

AbstractProper coronal and transverse ligament balancing is an important aspect of total knee arthroplasty (TKA) and has an impact on postoperative outcome. Many variations of the gap balancing technique were described to address this challenge, most of them using various tensioning devices, but none for which the use is widespread. The aim of this paper is to describe a gap technique variant for TKA using spacer blocks and report the clinical results for a cohort of patients on which it was used. A total of 114 TKAs were performed in 101 patients using a standardized surgical technique that integrates ligament balancing with sizing and positioning of the femoral component. Clinical variables were assessed preoperatively and after a mean follow-up of 43 months using the Knee Society score, the Knee injury and Osteoarthritis Outcome Score (KOOS), and the International Knee Documentation Committee (IKDC) score. A significant improvement in every clinical function score was noted at the latest follow-up compared with preoperative values. All the knees except four (96%) were well-balanced at the last follow-up examination; a firm but delayed end-point was noted in the remaining four knees but did not seem to affect patient outcome. The patellar button was centered in the prosthetic trochlear groove for all knees on the postoperative radiographs. Similar improvements in the scores and in range of motion were noted for knees with a preoperative coronal misalignment of 10 degrees or more (n = 26) compared with knees with less than 10 degrees of varus or valgus (n = 77). The described surgical technique appears to be reliable to obtain well-balanced knees and good patellar tracking when performing a primary TKA, even in knees with important coronal misalignment.

scholarly journals Soft Tissue Envelope Preserving Technique for Computer Navigated Total Knee Arthroplasty

2017 ◽  
Vol 5 (5_suppl5) ◽  
pp. 2325967117S0015
Author(s):  
Gavin Clark ◽  
Luke Mooney
Keyword(s):  
Total Knee Arthroplasty ◽  
Patient Satisfaction ◽  
Soft Tissue ◽  
Knee Arthroplasty ◽  
Mechanical Axis ◽  
Computer Navigation ◽  
Clinical Results ◽  
Short Term ◽  
Soft Tissue Envelope ◽  
Total Knee

Objectives: Current techniques in Total Knee Arthroplasty(TKA) are utilitarian in that all patients are recommended to have the same alignment of neutral mechanical axis. It has been well established that the population has a varied natural alignment with less than 20% of patients naturally neutral. The ability to predictably individualise alignment for patients is hypothesised to result in greater patient satisfaction. This technique aims to modify mechanical axis technique to consider an individual’s soft tissue constraints. Methods: Soft Tissue Envelope Preserving (STEP) is an operative technique for performing TKA that utilises the soft tissue data obtained intra-operatively from computer navigation registration to determine the optimal alignment to provide balanced positioning of implants without the need for soft tissue releases. Hence balance is achieved through bone cuts rather than altering the patient’s soft tissue balance. The technique will be described in detail. Results: The last 100 patients performed with complete data sets including navigation files and both pre-op and one year post operative outcome measures were reviewed. The spread of overall alignments and bony resections have been compiled with no outliers outside 5 degrees of neutral. The clinical results were comparable with other series and patient satisfaction of greater than 90% was reported. There were no MCL or LCL releases performed. Ilio-tibial band partial releases were the only reported soft tissue releases made. Conclusions: This technique is a safe and effective method of performing TKA with good short term outcomes. It minimises the use of soft tissue releases by utilising the patient’s own soft tissue envelope to balance the knee whilst maintaining the basic principles of a measured resection mechanical axis technique. It has resulted in excellent patient satisfaction in the short term.

scholarly journals Early Results of a Modular Cementless Tibial Component for Total Knee Arthroplasty

2014 ◽  
Vol 4 (3) ◽  
pp. 27-30
Author(s):  
Raj Sinha, MD, PhD ◽  
Cristian Balcescu
Keyword(s):  
Tibial Component ◽  
Base Plate ◽  
Clinical Results ◽  
Success Rates ◽  
Short Term ◽  
Early Results ◽  
Primary Tkas ◽  
Total Knee ◽  
Cementless Components ◽  
Bony Fixation

Cementless components in TKA have been used for almost 3 decades, despite mixed success rates. However, biologic fixation remains attractive, especially for younger patients, because of the potential of unlimited durability. This paper is the first to report results on a modular tibial base plate using trabecular metal as a fixation surface. Twenty-four primary TKAs were evaluated clinical and radiographically at mean 1.9 year followup. Excellent clinical results were obtained. There was no significant subsidence or change in orientation of any component. One component was probably loose radiographically but was insufficiently symptomatic to warrant revision. Five components showed nonprogressive radiolucent lines. One reoperation was performed for stiffness, at which time the components were well fixed. Thus, it would appear that excellent bony fixation can be achieved with a modular cementless tibial component with excellent short-term clinical results.

scholarly journals Short-term Clinical Results of NexGen LPS-Flex Total Knee Arthroplasty.

2003 ◽  
Vol 52 (1) ◽  
pp. 210-214 ◽  
Author(s):  
Kei Kawaguchi ◽  
Yasushi Momota ◽  
Kotaro Hoshino
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Short Term ◽  
Total Knee

The Miller-Galante total knee arthroplasty:Evaluation of design, surgical technique, indications, and clinical results

1991 ◽  
Vol 6 (4) ◽  
pp. 30-38 ◽  
Author(s):  
James L. Guyton ◽  
Aaron G. Rosenberg
Keyword(s):  
Surgical Technique ◽  
Clinical Results ◽  
Total Knee
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