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Published in: International Orthopaedics 1/2019

01-01-2019 | Original Paper

The anterior-based muscle-sparing approach to the hip: the “other” anterior approach to the hip

Authors: Roberto Civinini, Andrea Cozzi Lepri, Christian Carulli, Fabrizio Matassi, Marco Villano, Massimo Innocenti

Published in: International Orthopaedics | Issue 1/2019

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Abstract

Purpose

The purpose of this study was to evaluate safety, efficacy, and learning curves of anterior-based muscle-sparing total hip arthroplasty (ABMS-THA) in the supine position. Furthermore, early functional outcome was evaluated and compared to direct anterior approach (DAA) by measuring surface electromyography (sEMG).

Methods

We present a prospective cohort study of 343 hips. The safety and learning curve were assessed by recording operative time and peri-operative adverse events. For assessment of efficacy, functional and radiological outcomes were evaluated. A selected group of 32 patients have been studied by sEMG and compared to a matched group of 32 patients who received a THA using DAA approach.

Results

There was one dislocation (0.3%); two (0.6%) patients had an intra-operative fractures of the greater trochanter; two patients (0.6%) experienced a self-limited femoral nerve palsy. Physical therapy milestones for hospital discharge were reached on an average of 1.7 days. sEMG showed that ABMS and DAA have a similar muscle recruitment pattern and functional recovery after THA. One patient was revised for infection, 16 were lost, and 326 hips were available with a median follow-up of 42 months (range 24–60). The mean Harris Hip Score (HSS) increased from 44.3 to 91.9. Ninety-six percent of the hips had a leg length discrepancy (LLD) < 5 mm. There were no radiological signs of mechanical loosening or osteolysis.

Conclusions

The ABMS approach in the supine position is clinically effective and safe; special advantages include a very low dislocation rate and a great control of LLD.
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Metadata
Title
The anterior-based muscle-sparing approach to the hip: the “other” anterior approach to the hip
Authors
Roberto Civinini
Andrea Cozzi Lepri
Christian Carulli
Fabrizio Matassi
Marco Villano
Massimo Innocenti
Publication date
01-01-2019
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 1/2019
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-018-4190-6

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