Design considerations for patient-specific surgical templates for total hip arthroplasty with respect to acetabular cartilage

verfasst von

Samuel Müller, Intsar Ahmad, Manuel Kraemer, Michael Utz, Johannes Gaa, Lüder A. Kahrs, Tobias Ortmaier

Abstract

Patient-specific instruments (PSIs) are clinically used to support the surgeon during a planned intervention. The planning is typically done based on volumetric image data from medical imaging systems, e.g. computed tomography (CT). The PSI uses the known surface structure of a bone for orientation during the intervention. Some surfaces of human bone are covered with a layer of cartilage which is hardly visible in clinically applied CT-imaging. This experimental study investigates ten different PSI designs and their effect to the overall accuracy when neglecting the cartilage in the design process. Therefore, a model of an acetabulum is used to simulate the use case of PSI in total hip arthroplasty. The concept of the different designs is to create structural elasticities in the PSI to avoid shifting of the whole instrument and rather have a small part of it deformed by cartilage. A needle array structure, for instance, should also be able to oust or penetrate remaining soft tissue in the acetabulum.

Organisationseinheit(en)

Institut für Mechatronische Systeme

Externe Organisation(en)

Medizinische Hochschule Hannover (MHH)
Aesculap AG

Typ

Artikel

Journal

Biomedizinische Technik

Band

62

Seiten

263-269

Anzahl der Seiten

7

ISSN

0013-5585

Publikationsdatum

24.05.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Biomedizintechnik

Elektronische Version(en)

https://doi.org/10.1515/bmt-2016-0020 (Zugang: Geschlossen)