The aim of this work was to investigate the effect of silica coating on bioactivity and biodegradability of hydroxyapatite. In this purpose, we firstly attempted to synthesis hydroxyapatite (HA) nanoparticles and its silica coated (Si-HA) sample in collagen matrix using calcium chloride, sodium phosphate and sodium silicate. Characterization of the sample was carried out using Fourier transform...

The main motive of the study is to analyze and compare crystallographic changes using X-Ray diffraction method for zinc substituted hydroxyapatite. Materials Methods: Different types hydroxyapatite are used. Calcium nitrate tetrahydrate, chloride hexahydrate, diammonium hydrogen phosphate ammonium hydroxide solutions added they mixed with solution. ultrasonic was used carry precipitation method...

Background: In this research article, we evaluate the use of sub-periosteal tunneling (tunnel technique) combined with alloplastic in situ hardening biphasic calcium phosphate (BCP, a compound of β-tricalcium phosphate and hydroxyapatite) bone graft for lateral augmentation of a deficient alveolar ridge. Methods: A total of 9 patients with deficient mandibular alveolar ridges were included in t...

alpha-Tricalcium phosphate bone cement, as formerly designed and developed by Driessens et al., consists of a powder composed by alpha-tricalcium phosphate (alpha-TCP) and hydroxyapatite (HA) seeds, and an aqueous solution of Na2HPO4 as mixing liquid. After mixing powder and liquid, alpha-TCP dissolves into the liquid and calcium deficient hydroxyapatite (CDHA), more insoluble than the former, ...

The activity of calcium in plaque fluid is needed to calculate the saturation level of that fluid relative to the tooth mineral. One method to determine the calcium activity in very small plaque fluid samples is by micro ion-selective electrode (ISE). Two commercially available calcium ionophores, a neutral-carrier and a charged-carrier, were evaluated in micro ISEs and compared to a commercial...

Introduction: A bone graft is a substitute material that has been widely used in grafting. In general, can be resorbable and replace normal the healing process within few months, because principle nature of osteoconduction, osteoinduction, osteogenic. One synthetic materials commonly hydroxyapatite (HA), which identical to crystal structure from bone. Review: Hydroxyapatite graft, most now due ...

In the submandibular saliva of 10 cystic fibrosis subjects and 10 controls the turbidity and elevated calcium, protein, and amylase concentrations of the cystic fibrosis secretions, and precipitation of calcium and phosphate in a ratio consistent with hydroxyapatite have been confirmed. By electron microscopy the centrifuged deposits of the cystic fibrosis saliva were seen to be composed predom...