Related Experiment Video
Updated: Jul 14, 2026

Analysis of Trunk Neural Crest Cell Migration using a Modified Zigmond Chamber Assay
Published on: January 19, 2012
The Zweymüller threaded cup: a choice in revision? Migration analysis and follow-up after 6 years
Jörg Hartmut Schröder1, Georg Matziolis, Jens Tuischer
1Charité-Universitäts medizin Berlin, Zentrum für Muskuloskeletale Chirurgie, Klinik für Orthopädie, Campus Charité Mitte, Berlin, Germany.
Abstract:
Excellent long-term results are reported for threaded cups with an osteointegrable surface in primary interventions. So far, little data are available on the use of such implants in revision cases. We investigated 30 loosened Aesculap PM threaded cups (Tuttlingen, Germany) with a smooth surface, revised with a conical, corundum-blasted Zweymüller threaded cup (Zweymüller Alloclassic CSF cup, Zimmer, Warsaw, Ind). Aseptic radiological loosening was seen in 8% of cases, and a survival rate of 95% was achieved after 6.1 years. Average migration was 1.4 mm cranially and 0.7 mm medially. The Harris hip score improved from 42 points preoperatively to 75 points at follow-up. Good medium-term results are possible after revision using a threaded cup with an osteointegrable surface, but not if segmental acetabular margin defects are present.
Related Concept Videos
Migration
Woodward–Hoffmann Selection Rules and Microscopic Reversibility
Design of Transmission Shafts
Residual Stresses in Circular Shafts
Thin-Walled Hollow Shafts
Design of Transmission Shafts - Stress Analysis

