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Skeletal Radiology
Published in: Skeletal Radiology 10/2012

01-10-2012 | Scientific Article

Validity and reliability of preoperative templating in total hip arthroplasty using a digital templating system

Authors: Ari Bertz, Kari Indrekvam, Mohamed Ahmed, Erling Englund, Arkan S. Sayed-Noor

Published in: Skeletal Radiology | Issue 10/2012

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Abstract

Objectives

To evaluate the validity, interobserver reliability, and intraobserver reproducibility of a digital templating system, the Mdesk™ in preoperative templating in cemented and reverse hybrid total hip arthroplasty (THA).

Materials and methods

Validity was evaluated by comparing the planned cup size, stem size, CCD angles, and neck length with the components used in 129 patients operated with cemented and reverse hybrid THA. The reliability was measured by comparing the templating results of two surgeons with each other (interobserver) and the results of two templatings carried out by first surgeon (intraobserver). The leg length discrepancy was measured before and after the operation to assess the templating ability to correct it.

Results

The Mdesk™ system showed good validity (kappa value ranged from 0.64 to 0.96), especially when one size over and under the planned size were included. No difference between cemented and cementless stems was found. The interobserver reliability ranged from fair (kappa 0.23) to substantial (kappa 0.61) while the intraobserver reproducibility ranged from substantial (kappa 0.70) to excellent (kappa 0.82). Templating and intraoperative measures succeeded to restore the leg length.

Conclusions

The Mdesk™ system has comparable validity and reliability with other templating systems used in clinical practice. We recommend that the same surgeon who does the preoperative radiographic templating to also perform the operation. Further studies are required to evaluate the results of succeeded templating in the long run.
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Metadata
Title
Validity and reliability of preoperative templating in total hip arthroplasty using a digital templating system
Authors
Ari Bertz
Kari Indrekvam
Mohamed Ahmed
Erling Englund
Arkan S. Sayed-Noor
Publication date
01-10-2012
Publisher
Springer-Verlag
Published in
Skeletal Radiology / Issue 10/2012
Print ISSN: 0364-2348
Electronic ISSN: 1432-2161
DOI
https://doi.org/10.1007/s00256-012-1431-4

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