scholarly journals Outcome in Total Knee Arthroplasty with a Medial-Lateral Balanced versus Unbalanced Gap

2016 ◽  
Vol 24 (3) ◽  
pp. 298-301 ◽  
Author(s):  
Ahmed Jawhar ◽  
Karolin Hutter ◽  
Hanns-Peter Scharf
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Womac Score ◽  
Computer Assisted ◽  
Womac Questionnaire ◽  
Total Womac Score ◽  
Total Knee ◽  
Extension Gap

Purpose To evaluate the clinical outcome in 108 total knee arthroplasty (TKA) patients with a medial-lateral balanced versus unbalanced gap after a mean follow-up of 34 months. Methods 64 women and 44 men (mean age, 69.5 years) underwent computer-assisted TKA for osteoarthritis using a cemented fixed-bearing cruciate-retaining prosthesis. The medial-lateral gap difference (measured with the prosthesis in situ and the patella reduced) was balanced (≤2 mm) in 81 patients and unbalanced (>2 mm) in 27 patients. After a mean follow-up of 34 months, patients were assessed using the Western Ontario and McMaster Universities Arthritis Index (WOMAC) questionnaire for pain, stiffness, and physical function. Scores were normalised to 0% (worst) to 100% (best). Results The balanced and unbalanced gap groups were comparable in terms of age, severity of osteoarthritis, and proportion of pre- and postoperative mechanical alignment. Compared with the balanced gap group, the unbalanced gap group had a larger medial-lateral extension gap difference (0.75±0.57 vs. 2.02±1.15 mm, p=0.001) and medial-lateral flexion gap difference (0.79±0.63 vs. 2.98±2.13 mm, p=0.001) and lower normalised total WOMAC score (84.9±18 vs. 74.8±20.8, p=0.017). Conclusion WOMAC score is better in TKAs with a medial-lateral balanced (<2 mm) gap.

scholarly journals Double-high insert presents with worse mid-term outcomes in cruciate-retaining medial-pivotal total knee arthroplasty – a propensity score matched analysis with averaged 8-year follow-up

2021 ◽  
Author(s):  
Shuai Xiang ◽  
Yingzhen Wang ◽  
Chengyu Lv ◽  
Changyao Wang ◽  
Haining Zhang
Keyword(s):  
Total Knee Arthroplasty ◽  
Propensity Score ◽  
Knee Arthroplasty ◽  
Womac Score ◽  
Cruciate Retaining ◽  
Radiographic Outcomes ◽  
Clinical Scores ◽  
Total Knee ◽  
Knee Society Function Score

Abstract Background The aim of this study was to compare the mid-term clinical and radiographic outcomes between medial-pivotal (MP) insert and double-high (DH) insert used under cruciate-retaining condition in ADVANCE® total knee arthroplasty (TKA). Methods The follow-up was conducted for 158 consecutive patients underwent unilateral ADVANCE® TKA from January 2011 to April 2014. 84 MP inserts and 74 DH inserts were used under cruciate-retaining condition. A 1:1 propensity score matching (PSM) analysis was performed between MP insert and DH insert to compare the clinical and radiographic outcomes. Results After a 1:1 PSM, 120 patients (60 pairs) were matched between MP insert and DH insert. The baseline demographic parameters and clinical scores were comparable between the two groups. The postoperative clinical outcomes at an averaged 8-year follow-up of both groups were significantly improved. The range of motion (ROM) of DH group was better than that of MP group and equivalent Knee Society Function Score (KSFS) between the two groups was found. However, the Knee Society Score (KSS), Western Ontario and McMaster Universities Arthritis Index (WOMAC) score and Forgotten Joint Score (FJS) of MP group were found to be significantly superior than those of DH group. Comparable complication rate and revision rate were observed between the two groups. The radiographic results were also equally good between MP and DH group. Conclusions Although the mid-term clinical and radiographic outcomes of DH insert are fairly good, the clinical scores of DH group were worse than those of MP group.

Conventional Versus Computer-Assisted Technique for Total Knee Arthroplasty: A Minimum of 5-Year Follow-up of 200 Patients in a Prospective Randomized Comparative Trial

2014 ◽  
Vol 29 (9) ◽  
pp. 1795-1802 ◽  
Author(s):  
Johannes Cip ◽  
Mark Widemschek ◽  
Matthias Luegmair ◽  
Mitchell B. Sheinkop ◽  
Thomas Benesch ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Comparative Trial ◽  
Computer Assisted ◽  
Total Knee

scholarly journals Revision Total Knee Arthroplasty With the Use of Restricted Kinematic Alignment Protocol: Surgical Technique and Initial Results

2021 ◽  
Vol 8 ◽  
Author(s):  
Lazaros Kostretzis ◽  
Gabriel Bouchard Roby ◽  
Sagi Martinov ◽  
Marc-Olivier Kiss ◽  
Janie Barry ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Adverse Events ◽  
Knee Arthroplasty ◽  
Womac Score ◽  
Kinematic Alignment ◽  
Posterior Stabilized ◽  
Patient Reported ◽  
Total Knee ◽  
Revision Tka

Purpose: Kinematic alignment (KA) for primary total knee arthroplasty (TKA) has been shown to provide equivalent or better results to mechanical alignment (MA). The use of KA in revision TKA to restore the individual knee anatomy, kinematics, and soft-tissue balance, has not been documented yet. The purpose of this study is to describe the technique for performing TKA revision using the restricted KA (rKA) protocol and to report (1) rerevision rate and adverse events, (2) patient-reported outcome measures (PROMs), and (3) radiological signs of implant dysfunction related to this technique.Methods: The rKA protocol was used in 43 selected TKA revisions cases suitable for the technique. Adverse events, reoperation, revision, and their causes were recorded. In addition, PROMs assessed by WOMAC score and radiographic evaluation to identify signs of implant dysfunction were documented at last follow-up.Results: After a mean follow-up of 4.0 years (0.9–7.7, ±2), only one rerevision (2.3%) was required for persisting instability (polyethylene liner exchange from posterior stabilized to a semi-constrained). Short-cemented stems were used for both the femur and tibia in 28 (65%) cases, for the femur alone in 13 (30%) cases, and no stems in two cases. In 31 (72%) cases, a standard posterior stabilized tibial insert was used, while 12 (28%) cases required a semi-constrained insert. The mean WOMAC score was 34.4 (0–80, ±21.7). Mean postoperative arithmetic hip-knee-ankle angle (HKA) was 0.8° varus (from 5° varus to 4° valgus), mean mechanical distal femoral angle was 1.7° valgus (from 2° varus to 5° valgus), and mean mechanical tibia proximal angle was 2.2° varus (from 5° varus to 1° valgus). No radiological evidence of aseptic loosening or periprosthetic radiolucencies were identified.Conclusion: Although current revision TKA implants are not ideal for revision TKA performed with rKA, they are an appealing alternative to MA, especially in cases of early, non-wear-related, unsuccessful MA TKAs. rKA TKA revision using short-cemented stems in conjunction with meticulous preoperative planning is safe in the mid-term.Level of evidence: IV

Conventional versus computer-assisted surgery in total knee arthroplasty: comparison at ten years follow-up

2018 ◽  
Vol 43 (6) ◽  
pp. 1355-1363 ◽  
Author(s):  
Michele d’Amato ◽  
Andrea Ensini ◽  
Alberto Leardini ◽  
Paolo Barbadoro ◽  
Andrea Illuminati ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Computer Assisted Surgery ◽  
Computer Assisted ◽  
Total Knee

A STUDY OF PRIMARY TOTAL KNEE ARTHROPLASTY (TOTAL KNEE REPLACEMENT) IN SEVERE DEGENERATIVE OSTEO ARTHRITIS OF KNEE

2021 ◽  
pp. 56-58
Author(s):  
Voligi Shekhar ◽  
Sateesh Chandra P ◽  
Gunda Veera Redd
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Primary Total Knee Arthroplasty ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Total Knee ◽  
The Mean ◽  
Lost To Follow Up ◽  
Primary Total Knee

AIM: To assess the clinical outcome, to study radiological variable inuencing the outcome of total knee arthroplasty and to identity patient variable which signicantly inuence the outcome. Out MATERIALS&METHODS: of the 30 Arthroplasties performed in 28 patients with in the study period. 5 patients (5 knees) were lost to follow-up for various reasons and thus 23 patients (25 knees) were available for clinical review. The mean age of the patient RESULTS: at the time of surgery was 61.04 years. 76% of Knee had primary osteoarthritis and 25% had secondary OA. The average post-operative alignment as 4.3º valgus (range, 3º varus-10º valgus), the mean posterior slope of tibia (s) was 3.5º (range, 0-8º)c and the average femoral exion angle (?) 7.6º. In the assessment of post CONCLUSION: operative outcome of total knee arthroplasty, Knee Society Score is a very useful tool. Restoration of normal alignment of valgus (6 + 2º) is possible with conventional (without computer assisted navigation) surgical technique.

Medial and lateral gap laxity differential in computer-assisted kinematic total knee arthroplasty

2019 ◽  
Vol 101-B (3) ◽  
pp. 331-339 ◽  
Author(s):  
P. McEwen ◽  
G. Balendra ◽  
K. Doma
Keyword(s):  
Total Knee Arthroplasty ◽  
Outcome Measures ◽  
Knee Arthroplasty ◽  
Computer Assisted ◽  
Lateral Flexion ◽  
Lateral Extension ◽  
Flexion Gap ◽  
Patient Reported ◽  
Total Knee ◽  
Extension Gap

AimsThe results of kinematic total knee arthroplasty (KTKA) have been reported in terms of limb and component alignment parameters but not in terms of gap laxities and differentials. In kinematic alignment (KA), balance should reflect the asymmetrical balance of the normal knee, not the classic rectangular flexion and extension gaps sought with gap-balanced mechanical axis total knee arthroplasty (MATKA). This paper aims to address the following questions: 1) what factors determine coronal joint congruence as measured on standing radiographs?; 2) is flexion gap asymmetry produced with KA?; 3) does lateral flexion gap laxity affect outcomes?; 4) is lateral flexion gap laxity associated with lateral extension gap laxity?; and 5) can consistent ligament balance be produced without releases?Patients and MethodsA total of 192 KTKAs completed by a single surgeon using a computer-assisted technique were followed for a mean of 3.5 years (2 to 5). There were 116 male patients (60%) and 76 female patients (40%) with a mean age of 65 years (48 to 88). Outcome measures included intraoperative gap laxity measurements and component positions, as well as joint angles from postoperative three-foot standing radiographs. Patient-reported outcome measures (PROMs) were analyzed in terms of alignment and balance: EuroQol (EQ)-5D visual analogue scale (VAS), Knee Injury and Osteoarthritis Outcome Score (KOOS), KOOS Joint Replacement (JR), and Oxford Knee Score (OKS).ResultsPostoperative limb alignment did not affect outcomes. The standing hip-knee-ankle (HKA) angle was the sole positive predictor of the joint line convergence angle (JLCA) (p < 0.001). Increasing lateral flexion gap laxity was consistently associated with better outcomes. Lateral flexion gap laxity did not correlate with HKA angle, the JLCA, or lateral extension gap laxity. Minor releases were required in one third of cases.ConclusionThe standing HKA angle is the primary determinant of the JLCA in KTKA. A rectangular flexion gap is produced in only 11% of cases. Lateral flexion gap laxity is consistently associated with better outcomes and does not affect balance in extension. Minor releases are sometimes required as well, particularly in limbs with larger preoperative deformities. Cite this article: Bone Joint J 2019;101-B:331–339.

scholarly journals Outcomes of Computer-Assisted Total Knee Arthroplasty Compared to Conventional TKA: A Bicentric Controlled Retrospective Clinical Study

2021 ◽  
Vol 10 (15) ◽  
pp. 3352
Author(s):  
Biagio Zampogna ◽  
Stefano Campi ◽  
Guglielmo Torre ◽  
Eleonora Villari ◽  
Francesco Moncada ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Time Lapse ◽  
Conventional Technique ◽  
Computer Assisted ◽  
Clinical Databases ◽  
Retrospective Clinical Study ◽  
Significant Difference ◽  
Total Knee

Despite the globally ascertained success of Total Knee Arthroplasty (TKA) procedure, 20% of patients are still unsatisfied with the surgery results. The purpose of the study is to identify the functional and radiological outcomes of the computer-assisted (CAS) TKA compared to the conventional technique. The clinical databases and medical records of both clinical sites were retrospectively analyzed, and then according to study time-lapse, inclusion, and exclusion criteria, eligible patients were retrieved and included. A total of 42 patients that underwent to CAS TKA (NAVI) and 61 patients that underwent to Conventional TKA (CONV) were included. The NAVI group reported a statistically significant higher surgical time. A lower intraoperative blood loss was found in the computer-assisted group, though this difference was not statistically significant. Implant survival analysis at two years did not show differences between groups during the follow-up period. At two years, follow-up postoperative intergroup analysis showed no statistically significant difference between groups. According to the radiologic analysis, the NAVI group showed comparable outcomes to the conventional group. The present study showed that there was no clinical and radiological difference between CAS arthroplasty and conventional technique.

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