Related Experiment Video
Updated: Dec 15, 2025
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
Bone Attachment on a New Design of Cementless Stem and a Widely Used Cup: Postmortem Retrieval Findings
Neda Farbod Gilmartin1, William G Hamilton2, Sang-Hyun Park1
1J. Vernon Luck Sr. Orthopaedic Research Center at the Orthopaedic Institute for Children, Los Angeles, California.
Case:
This was a postmortem retrieval study to assess bone fixation in a hydroxyapatite-coated ACTIS stem and a beaded Pinnacle Sector cup retrieved from an 89-year-old man 15-months postoperatively. Previous radiographic examinations showed good implant fixation without any radiolucency. The sectioned cup and stem showed good fixation on visual, microradiographic, and histological examinations. Slight changes in bone density and mineral content were observed.
Conclusions:
Clinical fixation was achieved in both components with variable degrees of bone ingrowth and ongrowth at 15 months postoperatively in this postmortem retrieval case.
