Ready-To-Use and Rapidly Biodegradable Magnesium Phosphate Bone Cement: In Vivo Evaluation in Sheep.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37224104.
- Also identified by DOI 10.1002/adhm.202300914 and PMC identifier 11468836.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
In clinical practice, hydroxyapatite (HA) cements for bone defect treatment are frequently prepared by mixing a powder component and a liquid component shortly before implantation in the operation theater, which is time-consuming and error-prone. In addition, HA cements are only slightly resorbed, that is, cement residues can still be found in the bone years after implantation. Here, these challenges are addressed by a prefabricated magnesium phosphate cement paste based on glycerol, which is ready-to-use and can be directly applied during surgery. By using a trimodal particle size distribution (PSD), the paste is readily injectable and exhibits a compressive strength of 9-14 MPa after setting. Struvite (MgNH<sub>4</sub> PO<sub>4</sub> ·6H<sub>2</sub> O), dittmarite (MgNH<sub>4</sub> PO<sub>4</sub> ·H<sub>2</sub> O), farringtonite (Mg<sub>3</sub> (PO<sub>4</sub> )<sub>2</sub> ), and newberyite (MgHPO<sub>4</sub> ·3H<sub>2</sub> O) are the mineral phases present in the set cement. The paste developed here features a promising degradation of 37% after four months in an ovine implantation model, with 25% of the implant area being newly formed bone. It is concluded that the novel prefabricated paste improves application during surgery, has a suitable degradation rate, and supports bone regeneration.
Medical subject headings
- Bone Cements
- Phosphates