The extraction of metals from supports based on calcium phosphate was investigated; we conducted experiments with metal solutions at various concentrations, and using two carriers’ calcium phosphate hydroxyapatite and hydroxyapatite in the presence of polyethylene glycol polymer. The results show a metal retention of selectivity with excellent yields. The kinetic study shows that the extraction...

Objective: to determine the effect of nano-hydroxyapatite and different bioactive remineralizing agent in treatment loss enamel minerals. Material M nano-hydroxyapatite, Casein phospho-peptide amorphous calcium phosphate Sodium Fluoride. While artificial saliva was applied on control specimens. Surface microhardness measurements baseline were calculated, before/after demineralization digital 3D...

One of the main problems that remain in implant industry is poor osseointegration due to bioinertness implants. In order promote bioactivity, calcium (Ca), phosphorus (P) and strontium (Sr) were incorporated into a TiO2 porous layer produced by micro-arc oxidation. Ca P as bioactive elements are already well reported literature, however, knowledge effect Sr still limited. present work, various ...

There are three varieties of cartilage-hyaline, elastic, and fibrocartilage. Hyaline cartilage is the precursor of bone. In the adult it is mainly found at bone ends, forming the load-bearing surface of synovial joints. Extra-articular fibrocartilages such as those of the trachea and ribs often calcify with advancing age. Articular cartilage, however, usually remains free from mineral deposits....

This paper describes novel and innovative amorphous calcium magnesium fluoride phosphate (ACMFP) core-shell microparticles that may be applied in preventive dentistry for the prevention of caries treatment dentin hypersensitivity. The particles can synthesized with varied content, up to approximately 6 wt%, without any observable differences morphology or crystallinity. Fluoride release from is...

A review of classes of biomaterials and their applications is presented. Particular interest is paid to bioceramics, calcium phosphates and hydroxyapatite which are the leading biomaterials employed today. Several methods for producing hydroxyapatite are presented, including the characteristics and disadvantages of each methodology reported in specialized literature. The main trends of the mode...

     In this study, hydroxyapatite (HA) nanocrystals have been synthesized via chemical precipitation technique. Diammonium hydrogen phosphate and calcium nitrate 4-hydrate were used as starting materials and sodium hydroxide solution was used as the agent for pH adjustment. The powder sample was evaluated by techniques such as scanning electron microscope, transmission electron microscope, Fou...

Kidney and uteric stones are a common cause of pain disturbance in numerous people worldwide, as they tend to reappear. There several studies investigating the association urolithiasis nephrolithiasis with atherosclerosis, patients suffering from former diseases were found have been diagnosed atherosclerotic plaques. Hydroxyapatite calcium oxalate most mineral crystals both kidney/uteric plaque...

Double-layer composite coatings composed of a P2O5-based glass/Ca10(PO4)6(OH)2 (HA) mixture top layer and a simple HA underlayer, on Ti-6Al-4V substrates, were prepared using a plasma-spraying technique. The in vitro bioactivity of these coatings was assessed by immersion testing in simulated body fluid. Both scanning electron microscopy (SEM) analysis and the ionic solution changes followed by...