Cup press fit in uncemented THA depends on sex, acetabular shape, and surgical technique.

Clinical Orthopaedics and Related Research
Eduardo Garcia-ReyAna Cruz-Pardos

Abstract

Uncemented press-fit cups provide bone fixation in primary THA, but the use of screws is sometimes necessary to achieve primary stability of the socket. However, it is unclear whether and when screws should be used. We analyzed the factors related to screw use with a press-fit uncemented cup and assessed whether screw use is associated with the same rates of loosening and revision as a press-fit technique. We retrospectively reviewed 248 patients who underwent THA using the same prosthetic design. Eighty-eight hips had screws to achieve primary cup fixation (Group 1), and 189 did not (Group 2). Mean age was 50 years (range, 14-73 years). We analyzed factors related to the patient, acetabular type, and reconstruction of the rotation center of the hip. Minimum followup was 5 years (mean, 8.9 years; range, 5-12 years). We found higher screw use in women, patients with less physical activity, Acetabular Types A or C, and a distance from the center of the prosthetic femoral head to the normal center of rotation of more than 3 mm. There were four revisions in Group 1 and five in Group 2. Eight hips had radiographic loosening in Group 1 and nine in Group 2. Cups with a postoperative abduction angle of more than 50° had a higher risk f...Continue Reading

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Citations

Dec 23, 2016·Clinical Orthopaedics and Related Research·Enrique Gomez-Barrena
Jun 26, 2017·Orthopaedics & Traumatology, Surgery & Research : OTSR·U BrulcB Mavčič
Aug 2, 2018·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·William A ManningJames Holland
Feb 7, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Tomonori TetsunagaToshifumi Ozaki
Apr 25, 2019·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Adam James FarrierJames Holland
Jan 15, 2014·International Orthopaedics·Takaaki FujishiroMasahiro Kurosaka
Oct 15, 2019·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Adam James FarrierJames Holland
Feb 15, 2020·The Journal of International Medical Research·Chen FeiKun Zhang
Jun 18, 2014·Biomedizinische Technik. Biomedical Engineering·Werner Winter, Matthias Karl
Feb 18, 2014·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Thomas IlchmannMartin Clauss
Aug 11, 2016·International Orthopaedics·Simo S A MiettinenVille Remes
Feb 7, 2017·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Eduardo García-Rey
Nov 2, 2016·Clinical Orthopaedics and Related Research·Kazuhiro HasegawaHiroyuki Tsuchiya
Dec 16, 2020·Orthopaedics & Traumatology, Surgery & Research : OTSR·Eduardo Garcia-ReyEduardo Garcia-Cimbrelo

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