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International Orthopaedics

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Open Access 01-10-2014 | Original Paper

Patient-specific computed tomography based instrumentation in total knee arthroplasty: a prospective randomized controlled study

Authors: Andrzej Kotela, Ireneusz Kotela

Published in: International Orthopaedics | Issue 10/2014

Abstract

Purpose

The aim of this study was to compare radiological results of total knee arthroplasties (TKAs) performed with patient-specific computed tomography (CT)-based instrumentation and conventional technique. The main study hypothesis was that CT-based patient-specific instrumentation (PSI) increases the accuracy of TKA.

Methods

A prospective, randomized controlled trial was carried out between January and December 2011. A group of 112 patients who met the inclusion and exclusion criteria were enrolled in this study and randomly assigned to an experimental or control group. The experimental group comprised 52 patients operated on with the aid of the Signature™ CT-based implant positioning system. The control group consisted of 60 patients operated on using conventional instrumentation. The radiographic evaluation of implant positioning and overall coronal alignment was performed 12 months after the surgery by using standing anteroposterior radiographs of the entire lower limb and standard lateral radiographs.

Results

Of the 112 patients initially enrolled for the study, 95 were included in the subsequent analyses. There were no statistically significant differences between groups in respect to coronal and sagittal component positioning and overall coronal alignment, except for frontal tibial component positioning. For this parameter, better results were obtained in the control group, with borderline statistical significance.

Conclusions

Our study did not reveal superiority of the CT-based PSI system over conventional instrumentation. Further high-quality investigations of patient-specific systems are absolutely indispensable to assess their utility for TKA. In our opinion, the surgeon applying PSI technology is required to have advanced knowledge and considerable experience with the conventional method.

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Title: Patient-specific computed tomography based instrumentation in total knee arthroplasty: a prospective randomized controlled study
Authors: Andrzej Kotela
Ireneusz Kotela
Publication date: 01-10-2014
Publisher: Springer Berlin Heidelberg
Published in: International Orthopaedics / Issue 10/2014
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI: https://doi.org/10.1007/s00264-014-2399-6

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Patient-specific computed tomography based instrumentation in total knee arthroplasty: a prospective randomized controlled study

Abstract

Purpose

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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