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International Orthopaedics
Published in: International Orthopaedics 2/2014

01-02-2014 | Original Paper

Patient-specific instruments in total knee arthroplasty

Authors: Fabio Conteduca, Raffaele Iorio, Daniele Mazza, Andrea Ferretti

Published in: International Orthopaedics | Issue 2/2014

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Abstract

Purpose

In recent years, patient-specific instruments (PSI) has been introduced with the aim of reducing the overall costs of the implants, minimising the size and number of instruments required, and also reducing surgery time. The purpose of this study was to perform a review of the current literature, as well as to report about our personal experience, to assess reliability of patient specific instrument system in total knee arthroplasty (TKA).

Methods

A literature review was conducted of PSI system reviewing articles related to coronal alignment, clinical knee and function scores, cost, patient satisfaction and complications.

Results

Studies have reported incidences of coronal alignment ≥3° from neutral in TKAs performed with patient-specific cutting guides ranging from 6 % to 31 %.

Conclusions

PSI seem not to be able to result in the same degree of accuracy as the CAS system, while comparing well with standard manual technique with respect to component positioning and overall lower axis, in particular in the sagittal plane. In cases in which custom-made cutting jigs were used, we recommend performing an accurate control of the alignment before and after any cuts and in any further step of the procedure, in order to avoid possible outliers.
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Metadata
Title
Patient-specific instruments in total knee arthroplasty
Authors
Fabio Conteduca
Raffaele Iorio
Daniele Mazza
Andrea Ferretti
Publication date
01-02-2014
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 2/2014
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-013-2230-9

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