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Archives of Orthopaedic and Trauma Surgery

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01-01-2010 | Orthopaedic Outcome Assessment

Cementless total hip replacement: a prospective clinical study of the early functional and radiological outcomes of three different hip stems

Authors: Philipp Bergschmidt, Rainer Bader, Susanne Finze, Alexander Gankovych, Guenther Kundt, Wolfram Mittelmeier

Published in: Archives of Orthopaedic and Trauma Surgery | Issue 1/2010

Abstract

Introduction

Optimal fixation of cementless total hip stems is essential for long-term survival rates.

Aim

The purpose of this prospective study was to evaluate the early clinical and radiological outcomes of two new total hip stems with metaphyseal (Symax^®) and predominantly diaphyseal (Hipstar^®) anchoring principles in comparison to the well-established straight Zweymueller (SL-Plus^®) stem.

Method

Clinical and radiological evaluations of 74 patients were undertaken preoperatively as well as at 6 and 12 months postoperatively using the Harris Hip Score (HHS) and Western Ontario and McMaster Universities-Score.

Results

During follow-up no stem had to be revised. The mean preoperative HHS of the three study groups amounted to 54.6 ± 15.7 points. At the 12 months follow-up the mean HHS in the SL-Plus group (n = 22) was 88.3 ± 10.5 points, in the Hipstar group (n = 25) 83.3 ± 15.0 and the in Symax group (n = 27) 83.6 ± 15.1. Due to stress shielding the straight Hipstar stem revealed radiolucent lines in the proximal Gruen zones of about 60%, whereas the SL-Plus stem showed significantly more radiolucent lines (87%). However, subsequent long-term studies must be carried out in order to clarify if the progression of radiolucent lines may influence the clinical result and implant longevity.

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Title: Cementless total hip replacement: a prospective clinical study of the early functional and radiological outcomes of three different hip stems
Authors: Philipp Bergschmidt
Rainer Bader
Susanne Finze
Alexander Gankovych
Guenther Kundt
Wolfram Mittelmeier
Publication date: 01-01-2010
Publisher: Springer-Verlag
Published in: Archives of Orthopaedic and Trauma Surgery / Issue 1/2010
Print ISSN: 0936-8051
Electronic ISSN: 1434-3916
DOI: https://doi.org/10.1007/s00402-009-0907-8

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Cementless total hip replacement: a prospective clinical study of the early functional and radiological outcomes of three different hip stems

Abstract

Introduction

Aim

Method

Results

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Introduction

Aim

Method

Results

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