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Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_11 | Pages 123 - 123
1 Jul 2014
PATIENT-SPECIFIC GUIDING FOR REVISION OF MEDIAL UNICOMPARTMENTAL TO TOTAL KNEE ARTHROPLASTY: BENEFICIAL FIRST RESULTS OF A NEW OPERATING TECHNIQUE PERFORMED ON TEN PATIENTS
Kerens B Boonen B Schotanus M Kort N
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Summary Statement

This is the first report of a new technique for unicompartmental to total knee arthroplasty revision surgery in which patient specific guides are formed based on preoperative CT imaging. This technique can help to make revision surgery less technically demanding.

Introduction

Unicompartmental to total knee arthroplasty revision surgery can be a technically demanding procedure. Joint line restoration, rotation and augmentations can cause difficulties. This study describes a new technique in which single way fitting guides serve to position knee system cutting blocks.

Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_11 | Pages 334 - 334
1 Jul 2014
REVISION FROM UNICOMPARTMENTAL TO TOTAL KNEE ARTHROPLASTY: CLINICAL OUTCOME DEPENDS ON REASON FOR REVISION
Kerens B Boonen B Schotanus M Lacroix H Emans P Kort N
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Summary Statement

This paper is the first to compare the results of unicompartmental to total knee arthroplasty revision surgery between cases with explained pain and cases with unexplained pain. Revision surgery for unexplained pain usually results in a less favourable outcome.

Introduction

Although it is suggested in literature that results of UKA to TKA revision surgery improve when the mechanism of failure is understood, a comparative study regarding this topic is lacking.

Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_11 | Pages 121 - 121
1 Jul 2014
RADIOGRAPHIC AND OPERATIVE OUTCOME FOR PATIENT-SPECIFIC GUIDES COMPARED WITH CONVENTIONAL INSTRUMENTATION IN TOTAL KNEE ARTHROPLASTY: A MULTICENTRE, PROSPECTIVE, RANDOMISED CONTROLLED TRIAL
Boonen B Schotanus M Kerens B van der Wegen W Kort N
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Summary

Alignment results did not differ between PSG and conventional instrumentation. A small reduction in operation time and blood loss was found with the PSG system, but is unlikely of clinical significance. Length of hospital stay was identical for both groups.

Introduction

Several techniques for aligning a TKA exist nowadays. Patient-specific guiding (PSG) has relatively recently been introduced to try to resolve the shortcomings of existing techniques while optimising the operative procedure. Still few reports have been published on the clinical outcome and on the peroperative results of this new technique. This prospective, double-blind, randomised controlled trial was designed to address the following research questions: 1. Is there a significant difference in outliers in alignment in the frontal and sagittal plane between PSG TKA and conventional TKA. 2. Is there a significant difference in operation time, blood loss and length of hospital stay between the 2 techniques.