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BMC Musculoskeletal Disorders
Published in: BMC Musculoskeletal Disorders 1/2021

Open Access 01-12-2021 | Hip Dysplasia | Research article

The accuracy of digital templating in cementless total hip arthroplasty in dysplastic hips

Authors: Emelie Kristoffersson, Volker Otten, Sead Crnalic

Published in: BMC Musculoskeletal Disorders | Issue 1/2021

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Abstract

Background

Total hip arthroplasty (THA) for developmental dysplasia of the hip (DDH) is a complex procedure due to associated anatomical abnormalities. We studied the extent to which preoperative digital templating is reliable when performing cementless THA in patients with DDH.

Methods

We templated and compared the pre- and postoperative sizes of the acetabular and femoral components and the center of rotation (COR), and analysed the postoperative cup coverage, leg length discrepancy (LLD), and stem alignment in 50 patients (56 hips) with DDH treated with THA.

Results

The implant size exactly matched the template size in 42.9% of cases for the acetabular component and in 38.2% of cases for the femoral component, whereas the templated ±1 size was used in 80.4 and 81.8% of cases for the acetabular and femoral components, respectively. There were no statistically significant differences between templated and used component sizes among different DDH severity levels (acetabular cup: p = 0.30 under the Crowe classification and p = 0.94 under the Hartofilakidis classification; femoral stem: p = 0.98 and p = 0.74, respectively). There were no statistically significant differences between the planned and postoperative COR (p = 0.14 horizontally and p = 0.52 vertically). The median postoperative LLD was 7 (range 0–37) mm.

Conclusion

Digital preoperative templating is reliable in the planning of cementless THA in patients with DDH.
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Metadata
Title
The accuracy of digital templating in cementless total hip arthroplasty in dysplastic hips
Authors
Emelie Kristoffersson
Volker Otten
Sead Crnalic
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Musculoskeletal Disorders / Issue 1/2021
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-021-04793-6

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