Published online Apr 18, 2021. doi: 10.5312/wjo.v12.i4.214
Peer-review started: September 10, 2020
First decision: January 27, 2021
Revised: February 1, 2021
Accepted: March 11, 2021
Article in press: March 11, 2021
Published online: April 18, 2021
Highly porous metal acetabular components are widely used in patients with low bone mass, but the strength of osseointegration may differ.
There is a need to perform studies to compare the strength of osseintegration of new porous metal biomaterials used in total hip arthroplasty of patients with low bone mass.
The objective of this study was to compare the strength of the formed bonе-metal osseointegration among four types of porous metal biomaterials in an in vivo animal model with both normal bone and after simulation of osteoporosis
The experimental study was performed in a rabbit model of postmenopausal osteoporosis. Biomechanical evaluation of the femur was carried out by testing the implant breakout force 8 wk after implantation of four types of biomaterials: TTM, CONCELOC, Zimmer Biomet's Trabecular Metal (TANTALUM), and ATLANT. The force was gradually increased until complete detachment of the implant from the bone.
The breakout force needed for implant detachment was significantly higher in healthy controls, compared with the ovariectomized group for all implants. The breakout force for ATLANT in the ovariectomized group was lower than that observed with TANTALUM, CONCELOC’ and TTM.
TANTALUM, TTM and CONCELOC had equal bone-implant osseointegration in healthy and osteoporotic bones. ATLANT showed a significant decrease in osseointegration in healthy and osteoporotic bone.
Further studies on the use of other biomechanical methods will expand the knowledge of the strength of osseointegration of modern porous materials, which will help in choosing optimal materials for acetabular implants when performing total hip arthroplasty in patients with osteoporosis.