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Updated: Dec 20, 2025

Accessing the Cytotoxicity and Cell Response to Biomaterials
Published on: July 8, 2021
Osteoclast and osteoblast response to strontium-doped struvite coatings on titanium for improved bone integration
Claus Moseke1, Katharina Wimmer2, Markus Meininger2
1Institute for Biomedical Engineering (IBMT), University of Applied Sciences Mittelhessen (THM), Giessen, Germany.
Abstract:
To develop implants with improved bone ingrowth, titanium substrates were coated with homogeneous and dense struvite (MgNH4PO4·6H2O) layers by means of electrochemically assisted deposition. Strontium nitrate was added to the coating electrolyte in various concentrations, in order to fabricate Sr-doped struvite coatings with Sr loading ranging from 10.6 to 115 μg/cm2. It was expected and observed that osteoclast activity surrounding the implant was inhibited. The cytocompatibility of the coatings and the effect of Sr-ions in different concentrations on osteoclast formation were analyzed in vitro. Osteoclast differentiation was elucidated on morphological, biochemical as well as on gene expression level. It could be shown that moderate concentrations of Sr2+ had an inhibitory effect on osteoclast formation, while the growth of osteoblastic cells was not negatively influenced compared to pure struvite surfaces. In summary, the electrochemically deposited Sr-doped struvite coatings are a promising approach to improve bone implant ingrowth.
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