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

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

Influence of the knot position on the union of the greater trochanter after bipolar hip arthroplasty via the modified Dall approach: a prospective non-randomized study

Authors: Masanao Kataoka, Hiroshi Fujita, Hiroaki Hara, Hideto Harada, Yuki Okutani, Yoshiki Murotani

Published in: BMC Musculoskeletal Disorders | Issue 1/2021

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Abstract

Background

In our institute, all elderly patients with displaced femoral neck fracture were treated with cemented bipolar hemiarthroplasty (BHA) using the modified Dall approach. To our knowledge, there are no reports on the knot position of the greater trochanter reattachment. The aim of this study was to determine influence of two knot positions (anterior or posterior) on the complications of the greater trochanter.

Methods

This is a prospective non-randomized study conducted on 95 elderly patients (95 hips) from September 2013 to December 2017. The knot position was changed from anterior to posterior alternately. The X-ray images obtained immediately after the operation were compared with those obtained at 3 months postoperatively; thereafter, the status of the greater trochanter was classified into three types: type A, no apparent shifting and fracture; type C, over 1-mm shifting of the fragment; and type F, fracture of the greater trochanter.

Results

Regarding age at operation, sex, BMI, size of the greater trochanteric fragment, stem type, and surgeon, there was no significant difference between two groups. In the anterior group, 34 hips (72.3%), 5 hips (10.6%), and 8 hips (17.0%) were classified under type A, C, and F, respectively. In the posterior group, 44 hips (91.7%), 1 hip (2.1%), and 3 hips (6.3%) were classified under type A, C, and F, respectively. There were significantly fewer greater trochanteric complications in the posterior group.

Conclusions

The posterior knot position improved the union of the greater trochanter after BHA compared with the anterior knot position.

Trial registration

We had approved IRB at our hospital clinical research review committee. Retrospectively registered.
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Metadata
Title
Influence of the knot position on the union of the greater trochanter after bipolar hip arthroplasty via the modified Dall approach: a prospective non-randomized study
Authors
Masanao Kataoka
Hiroshi Fujita
Hiroaki Hara
Hideto Harada
Yuki Okutani
Yoshiki Murotani
Publication date
01-12-2021
Publisher
BioMed Central
Keywords
Hip-TEP
Hip-TEP
Published in
BMC Musculoskeletal Disorders / Issue 1/2021
Electronic ISSN: 1471-2474
DOI
https://doi.org/10.1186/s12891-021-04005-1

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