International Comparative Evaluation of Knee Replacement with Fixed or Mobile Non-Posterior-Stabilized Implants

AbstractThe purpose of the present study was to measure the effects of gap balancing and resection techniques on migration of a single total knee replacement implant design. A total of 23 patients (24 knees) were recruited on referral to either a surgeon performing gap balancing or a surgeon performing measured resection and followed prospectively. All patients received a fixed bearing, posterior stabilized total knee replacement implant of a single radius femoral component design with cement fixation, and all aspects of care outside of resection technique were identical. Patients underwent radiostereometric analysis (RSA) at 2 weeks (baseline), 6 weeks, 3 months, 6 months, 1 year, and 2 years. Migration of the tibial and femoral components was compared between groups. Tibial component migration was greater at 2 years in the gap balancing group (mean difference = 0.336 mm, p = 0.036), but there was no difference at 1 year. One measured resection and three gap balancing tibial components demonstrated continuous migration > 0.2 mm between years 1 and 2. There was no difference in femoral component migration. Small differences in tibial component migration were found between the gap balancing and measured resection techniques. However, comparing the migration to established predictive thresholds for long-term loosening risk, implants performed with both techniques were found to have equally low revision risk.

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A comparative evaluation of operational efficiency of wood industry using data envelopment analysis and Malmquist productivity index

Drvna industrija ◽

10.5552/drvind.2019.1937 ◽

2019 ◽

Vol 70 (3) ◽

pp. 287-298 ◽

Cited By ~ 1

Author(s):

Jože Kropivšek ◽

Matej Jošt ◽

Petra Grošelj ◽

Darko Motik ◽

Andreja Pirc Barčić ◽

...

Keyword(s):

Data Envelopment Analysis ◽

Comparative Evaluation ◽

Operational Efficiency ◽

Malmquist Productivity Index ◽

Productivity Index ◽

Data Envelopment ◽

Low Carbon ◽

Wood Industry ◽

International Comparative ◽

Using Data

The wood industry, as a traditional sector, represents a very important part of the economy in terms of ensuring a sustainable development of society and transition to a low-carbon society in both countries studied, Slovenia and Croatia. For its further development, it is crucial to know the current position of the industry. The best way to achieve this is an analysis of financial data and international comparative evaluation of its operational efficiency. The aim of the research is to compare the relative efficiency of the wood industry using Data Envelopment Analysis (DEA) and the Malmquist Productivity Index (MI), focusing on the Slovenian and Croatian wood industry sectors (C16 and C31) for a recent five-year period (from 2013-2017). With this purpose, the combined measure DEA/MI was applied. The analysis includes only the highest rated companies with more than fi ve employees, divided into 12 clusters regarding the company size. As a result, it was established that clusters CRO-C31- micro, CRO-C16-micro and SI-C16-larger have the highest operational efficiency, due to the effects of different financial indicators, especially activity and liquidity ratios. In general, within the grouped clusters regarding country and subsector, groups SI-C16 and CRO-C31 achieve the highest values for the average of weighted score of efficiency, while CRO-C16 achieves the lowest values.

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Comparison of Cruciate Sacrificing vs Posterior Stabilized Total Knee Replacement Using A Contemporary Total Knee System.

The Journal of Arthroplasty ◽

10.1016/j.arth.2021.08.029 ◽

2021 ◽

Author(s):

Thomas L. Bernasek ◽

T. Kyle Stoops ◽

Meera Gill ◽

Corey Engel ◽

Peter Simon

Keyword(s):

Total Knee Replacement ◽

Knee Replacement ◽

Posterior Stabilized ◽

Total Knee

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Comparative Evaluation of Clonidine and Fentanyl as Adjuvants with Levobupivacaine for Postoperative Epidural Analgesia after Total Knee Replacement Surgery - A Randomised Double Blind Study

Anesthesia and Critical Care ◽

10.26502/acc.032 ◽

2022 ◽

Vol 04 (01) ◽

Author(s):

Madhukant . ◽

Subhash Chandra ◽

Rohit Kateliya ◽

Poonam Kumari ◽

Chandni Sinha ◽

...

Keyword(s):

Total Knee Replacement ◽

Epidural Analgesia ◽

Knee Replacement ◽

Comparative Evaluation ◽

Blind Study ◽

Double Blind Study ◽

Double Blind ◽

Replacement Surgery ◽

Total Knee ◽

Postoperative Epidural Analgesia

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The Effect on Long Term Survivorship of Surgeon Preference for Posterior Stabilized or Minimally Stabilized Total Knee Replacement: An Analysis of 63416 Cases from the AOANJRR

Orthopaedic Journal of Sports Medicine ◽

10.1177/2325967117s00170 ◽

2017 ◽

Vol 5 (5_suppl5) ◽

pp. 2325967117S0017

Author(s):

Christopher Vertullo ◽

Peter Lewis ◽

Michelle Lorimer ◽

Stephen Graves

Keyword(s):

Total Knee Replacement ◽

Selection Bias ◽

Knee Replacement ◽

High Volume ◽

Patellar Resurfacing ◽

Posterior Stabilized ◽

Observational Series ◽

Total Knee ◽

Optimum Management

Introduction & Aims: Controversy still exists as to the optimum management of the PCL in TKR, with registry data suggesting Posterior Stabilised TKR have a higher Cumulative Percent Revision (CPR) compared to Minimally Stabilised TKR. Proponents of PS TKR suggest this difference is due to selection bias as result of preferential use of PS TKR in complex or more severe cases. To remove this selection bias, we aimed to compare CPR based on surgeon TKR stability preference to treat with PS or MS TKR rather than actual prosthesis type received. Method: Observational series. An analysis of AOANJRR data from 1999 – 2014 was utilized to identify two cohorts of high volume surgeons who preferred to use routinely either MS or PS TKR. Only fixed tibial inserts and patellar resurfacing TKR were included. A MS preferring surgeon used MS TKR at least 90% of the time and a PS preferring surgeon used PS TKR at least 90% of the time. Consequently, each patient cohort included both PS and MS TKR in differing proportions. Results: Procedures undertaken by PS preferring surgeons had a significantly higher risk of revision (CPR (Hazard Ratio = 1.45 (95% CI 1.30, 1.63), p< 0.001). There was a higher rate of revision for loosening and infection in the PS group. Of the 39 941 TKR with cemented fixation of both femur and tibia, the PS preferring surgeons had a higher CPR than the MS preferring cohort (HR = 1.55 (1.33, 1.80), p< 0.001). Regardless of whether the polyethylene was crosslinked or non-crosslinked, the MS preferring surgeons had a lower CPR compared to the PS preferring surgeons. Conclusions: In this analysis, procedures undertaken by surgeons who mainly preferred to use PS TKR had a higher rate of revision than those that mainly used MS TKR. This finding was irrespective of patient age and was also evident when fixation and the type of polyethylene used was taken into account.

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