A biomechanical investigation of implant alignment and femoral neck notching with the Birmingham Mid-Head Resection

The Journal of Arthroplasty
M OlsenE H Schemitsch

Abstract

The Birmingham Mid-Head Resection (BMHR) is a bone-conserving, short-stem alternative to hip resurfacing for patients with compromised femoral head anatomy. The current study examined the effect of coronal implant alignment and femoral neck notching on proximal femoral strength with the BMHR. Neither relative valgus nor varus implant alignment had a significant impact on femoral strength compared to neutrally aligned, matched, paired cadaveric specimens. A 5-mm superior neck notch significantly weakened BMHR-implanted synthetic femurs compared to unnotched controls, whereas a 2-mm notch did not significantly affect ultimate failure load. Relative valgus alignment had a protective effect on a full-cortical-thickness superior neck notch. Mid-head resection arthroplasty may be more forgiving to minor preparatory errors than a typical hip resurfacing.

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Citations

Oct 2, 2013·HSS Journal : the Musculoskeletal Journal of Hospital for Special Surgery·Karthig Rajakulendran, Richard E Field
Sep 3, 2013·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·Coen A WijdicksMarc J Philippon
Mar 14, 2013·IEEE Transactions on Bio-medical Engineering·Zachary MorisonEmil H Schemitsch
Aug 22, 2015·International Orthopaedics·Eike Jakubowitz, Jörn Bengt Seeger
May 3, 2013·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Sam AghayanEdward T Davis
Dec 18, 2014·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Michael OlsenEmil H Schemitsch
Sep 4, 2015·Clinics in Orthopedic Surgery·Adeel AqilJustin Cobb
Sep 24, 2019·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Stefanos TsitlakidisMatthias C Klotz
Oct 17, 2014·The Journal of Bone and Joint Surgery. American Volume·Harpal S KhanujaMichael A Mont

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