Does component placement affect short-term clinical outcome in robotic-arm assisted unicompartmental knee arthroplasty?

2019 ◽  
Vol 101-B (4) ◽  
pp. 435-442 ◽  
Author(s):  
F. Zambianchi ◽  
G. Franceschi ◽  
E. Rivi ◽  
F. Banchelli ◽  
A. Marcovigi ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Clinical Outcome ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Robotic Arm ◽  
Short Term ◽  
Soft Tissue Balancing ◽  
Unicompartmental Knee ◽  
Post Implantation

Aims The purpose of this multicentre observational study was to investigate the association between intraoperative component positioning and soft-tissue balancing on short-term clinical outcomes in patients undergoing robotic-arm assisted unicompartmental knee arthroplasty (UKA). Patients and Methods Between 2013 and 2016, 363 patients (395 knees) underwent robotic-arm assisted UKAs at two centres. Pre- and postoperatively, patients were administered Knee Injury and Osteoarthritis Score (KOOS) and Forgotten Joint Score-12 (FJS-12). Results were stratified as “good” and “bad” if KOOS/FJS-12 were more than or equal to 80. Intraoperative, post-implantation robotic data relative to CT-based components placement were collected and classified. Postoperative complications were recorded. Results Following exclusions and losses to follow-up, 334 medial robotic-arm assisted UKAs were assessed at a mean follow-up of 30.0 months (8.0 to 54.9). None of the measured parameters were associated with overall KOOS outcome. Correlations were described between specific KOOS subscales and intraoperative, post-implantation robotic data, and between FJS-12 and femoral component sagittal alignment. Three UKAs were revised, resulting in 99.0% survival at two years (95% confidence interval (CI) 97.9 to 100.0). Conclusion Although little correlation was found between intraoperative robotic data and overall clinical outcome, surgeons should consider information regarding 3D component placement and soft-tissue balancing to improve patient satisfaction. Reproducible and precise placement of components has been confirmed as essential for satisfactory clinical outcome. Cite this article: Bone Joint J 2019;101-B:435–442.

Robotic Arm-Assisted Lateral Unicompartmental Knee Arthroplasty: How Are Components Aligned?

2021 ◽  
Author(s):  
Francesco Zambianchi ◽  
Giorgio Franceschi ◽  
Federico Banchelli ◽  
Andrea Marcovigi ◽  
Andrea Ensini ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Three Dimensional ◽  
Robotic Arm ◽  
Short Term ◽  
Soft Tissue Balancing ◽  
Lateral Unicompartmental Knee Arthroplasty ◽  
Lateral Uka

AbstractThe purpose of this multicenter, retrospective, observational study was to investigate the association between intraoperative component positioning and soft tissue balancing, as reported by robotic technology for a cohort of patients who received robotic arm-assisted lateral unicompartmental knee arthroplasty (UKA) as well as short-term clinical follow-up of these patients. Between 2013 and 2016, 78 patients (79 knees) underwent robotic arm-assisted lateral UKAs at two centers. Pre- and postoperatively, patients were administered the Knee Injury and Osteoarthritis Score (KOOS) and the Forgotten Joint Score-12 (FJS-12). Clinical results were dichotomized based upon KOOS and FJS-12 scores into either excellent or fair outcome, considering excellent KOOS and FJS-12 to be greater than or equal to 90. Intraoperative, postimplantation robotic data relative to computed tomography-based components placement were collected and classified. Following exclusions and loss to follow-up, a total of 74 subjects (75 knees) who received robotic arm-assisted lateral UKAs were taken into account with an average follow-up of 36.3 months (range: 25.0–54.2 months) postoperative. Of these, 66 patients (67 knees) were included in the clinical outcome analysis. All postoperative clinical scores showed significant improvement compared with the preoperative evaluation. No association was reported between three-dimensional component positioning and soft tissue balancing throughout knee range of motion with overall KOOS, KOOS subscales, and FJS-12 scores. Lateral UKA three-dimensional placement does not seem to affect short-term clinical performance. However, precise boundaries for lateral UKA positioning and balancing should be taken into account. Robotic assistance allows surgeons to acquire real-time information regarding implant alignment and soft tissue balancing.

scholarly journals Follow-up Study (short-term) on Unicompartmental Knee Arthroplasty

2006 ◽  
Vol 55 (3) ◽  
pp. 328-332
Author(s):  
Hiroto Ota ◽  
Katushi Kudo ◽  
Dai Tatsushiro ◽  
Masanori Matsumoto ◽  
Hiroyuki Yamada ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Short Term ◽  
Follow Up Study ◽  
Unicompartmental Knee

scholarly journals Hybrid Oxford unicompartmental knee arthroplasty has lower residual cement extrusion than cemented arthroplasty in treating end-stage unicompartmental knee osteoarthritis

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Guangzhong Yang ◽  
Xufeng Jiao ◽  
Qianli Li ◽  
Zheng Li ◽  
Shuai An ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Oxford Knee Score ◽  
Short Term ◽  
Unicompartmental Knee ◽  
Significant Difference ◽  
End Stage ◽  
Oxford Unicompartmental Knee Arthroplasty ◽  
Hybrid Group

Abstract Background Hybrid Oxford unicompartmental knee arthroplasty (OUKA) consists of cementless femoral prostheses and cemented tibial prostheses. Although a hybrid OUKA has been used in clinical practice, the clinical outcome has not been reported. The purpose of this study was to compare the short-term clinical outcomes and rate of residual bone cement extrusion between hybrid and cemented prostheses and analyse the possible reasons for differences between outcomes. Methods A total of 128 knees (118 patients) with end-stage osteoarthritis were included in this study, of which underwent consecutive operations using unicondylar Oxford phase 3 implants from July 2017 and September 2019 in our centre. Follow-up was performed at 6 weeks, 3 and 6 months, 1 year and every year after operation, and complications and changes in the Oxford knee score (OKS) were recorded. The OKS of the two groups was analysed by the generalized estimating equation approach. Prosthesis-based standard fluoroscopy was performed in a timely manner after each operation, and the rate of residual cement extrusion of the two groups was estimated using T-tests and a multivariate regression analysis. Results Excluding the cases that lost follow-up, a total of 120 knees (65 in hybrid group and 55 in cemented group) were included in the analysis. There was no statistically significant difference in patient characteristics between the two groups (p > 0.05). The average follow-up time was 23.4 months (and ranged from 12 to 38 months). As of the last follow-up, there were no complications, such as dislocation, fracture, prosthesis loosening and subsidence, but one patient in the cemented group experienced symptoms caused by residual loose cement. Postoperative OKS in both groups improved significantly (p < 0.001). There was no significant difference in the OKS at any point during the follow-up or in the improvement of the OKS between the two groups (p > 0.05). Residual cement was mainly extruded behind the tibial prosthesis. The rate of hybrid periprosthetic residual cement extrusion was significantly lower in the hybrid group than in the cemented group, and the difference was statistically significant (OR = 3.38; p = 0.014). Conclusions Hybrid OUKA is as effective as cemented OUKA in the short term after operation and can significantly reduce the residual cement extrusion rate around the tibial prosthesis.

scholarly journals Clinical Efficacy of Unicompartmental Knee Arthroplasty in the Treatment of Spontaneous Osteonecrosis of the Knee

2020 ◽  
Author(s):  
Hao Li ◽  
Ting ting Liu ◽  
Min Zhang
Keyword(s):  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Stage Iv ◽  
Knee Joints ◽  
Short Term ◽  
Vas Score ◽  
Unicompartmental Knee ◽  
Spontaneous Osteonecrosis ◽  
Before And After

Abstract BackgroundThis retrospective study aimed to evaluate the short-term effectiveness of unicompartmental knee arthroplasty (UKA) in the treatment of spontaneous osteonecrosis of the knee (SONK).MethodsThe patients who were diagnosed as SONK and received UKA in our hospital from January 2012 to January 2018 were retrospectively analyzed. The patients were diagnosed and staged by X-ray and MRI techniques before surgery. The range of motion (ROM), femorotibial angle (FTA), and visual analog scale (VAS) score of patients' knee joints were assessed before and after surgery. Clinical outcomes were evaluated by the hospital for special surgery (HSS) knee score.ResultsA total of 18 patients with spontaneous osteonecrosis (4 males and 14 females; mean age: 62.5 years) met the inclusion criteria participated in this study. According to the Mont grades, 12 cases (66.7%) were in stage III, and 6 cases (33.3%) were in stage IV. The average follow-up was 19.6 months. At the last follow-up, it was found that the hospital for HSS score was increased from 61.22 ± 2.90 to 91.0 ± 2.89 (P < 0.05); VAS score was decreased from 6.44 ± 1.04 to 1.94 ± 0.99 (P < 0.05); FTA was improved from 178.42 ± 0.84 to 176.17 ± 0.87 (P < 0.05); ROM (120.17 ± 5.88) was not significantly different from that before surgery (119.61 ± 5.56, P = 0.601).ConclusionThe encouraging results of this study indicate that UKA has an excellent short-term clinical effect in the treatment of SONK.

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