Skip to main content
main-content

06.03.2019 | Original Paper

Cup alignment in total hip arthroplasty using the muscle-sparing modified Watson-Jones approach—comparison between lateral and supine positions

Zeitschrift:
International Orthopaedics
Autoren:
Yuichi Kishimura, Yukihide Minoda, Shigekazu Mizokawa, Ryo Sugama, Yoichi Ohta, Hiroaki Nakamura
Wichtige Hinweise

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Purpose

The present study aimed to compare the cup alignment outliers in total hip arthroplasty (THA) using the same surgical approach with the patient in the supine position versus the lateral position.

Methods

THA using the muscle-sparing modified Watson-Jones approach was performed in 142 consecutive hips. THA was performed with the patient in the lateral position in 84 hips (lateral group) and in the supine position in 58 hips (supine group). The cup alignment was aimed at 40° inclination and 20° anteversion by referring to the mechanical alignment guide. Cup alignment and outliers (10° > aimed alignment) were assessed using post-operative 3D-CT.

Results

The absolute error from the aimed inclination was 6.0 ± 4.7° in the supine group and 4.2 ± 3.6° in the lateral group (p = 0.01). The absolute error from the aimed anteversion was 4.1 ± 3.2° in the supine group and 5.1 ± 3.7° in the lateral group (p = 0.12). The supine group showed a higher rate of outliers than the lateral group for the cup inclination (22% vs 5%; p < 0.01). Inclination and BMI were positively correlated in the spine position group (p < 0.01, R = 0.48), but were not correlated in the lateral position group.

Conclusion

THA performed with the patient in the supine position has a higher risk of outliers of cup alignment compared with the lateral position, even when the same surgical approach is used. BMI affected the cup inclination in the supine position.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

★ PREMIUM-INHALT
e.Med Interdisziplinär

Mit e.Med Interdisziplinär erhalten Sie Zugang zu allen CME-Fortbildungen und Fachzeitschriften auf SpringerMedizin.de. Zusätzlich können Sie eine Zeitschrift Ihrer Wahl in gedruckter Form beziehen – ohne Aufpreis.

Weitere Produktempfehlungen anzeigen
Literatur
Über diesen Artikel
  1. Sie können e.Med Orthopädie & Unfallchirurgie 14 Tage kostenlos testen (keine Print-Zeitschrift enthalten). Der Test läuft automatisch und formlos aus. Es kann nur einmal getestet werden.

Neu im Fachgebiet Orthopädie und Unfallchirurgie

Mail Icon II Newsletter

Bestellen Sie unseren kostenlosen Newsletter Update Orthopädie und Unfallchirurgie und bleiben Sie gut informiert – ganz bequem per eMail.

Bildnachweise