Volume 14, Issue 5 e1945
ORIGINAL ARTICLE

Virtual guidance versus virtual implant planning system in the treatment of distal radius fractures

Sven Yves Vetter

Sven Yves Vetter

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Jessica Magaraggia

Jessica Magaraggia

Division of Medical Image Computing, German Cancer Research Center (DKFZ), Heidelberg, Germany

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Nils Beisemann

Nils Beisemann

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Marc Schnetzke

Marc Schnetzke

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Holger Keil

Holger Keil

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Jochen Franke

Jochen Franke

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Paul Alfred Grützner

Paul Alfred Grützner

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

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Benedict Swartman

Corresponding Author

Benedict Swartman

BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Heidelberg, Germany

Correspondence

Dr Benedict Swartman, BG-Klinik Ludwigshafen, MINTOS Research Group, Department of Orthopaedics and Orthopaedic Trauma, Trauma Clinic at Heidelberg University, Ludwig-Guttmann-Str. 13, 67071 Ludwigshafen, Germany.

Email: [email protected]

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First published: 07 August 2018
Citations: 1

Abstract

Background

A virtual guidance framework is used to assist the conventional method of virtual implant planning system (VIPS). The study null hypothesis was that its screw placement accuracy is equal to that of conventional VIPS.

Methods

In 34 distal radius sawbone models, 3D implant planning was performed. A camera attached to the surgical drill was used to support screw positioning. Differences of angles/tip distances between planned and placed screws were identified in intraoperative cone beam Computer tomography (CT) and compared with already existing data from 22 patients treated by conventional VIPS.

Results

The virtual guidance group showed tip distances of 1.02 ± 0.56 mm, azimuth of 3.69° ± 4.34°, and inclination of 1.75° ± 1.37°, whereas the VIPS group showed tip distances of 2.23 ± 0.99 mm (P < 0.001), azimuth of 23.17° ± 33.50° (P < 0.001), and inclination angle of 4.18° ± 6.29° (P = 0.001).

Conclusions

The results reveal that using a guidance framework leads to a higher accuracy in screw placement compared with the conventional VIPS itself.

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