This experimental study was carried out to investigate the effect of medical grade calcium sulphate and β-tricalcium phosphate/ hydroxyapatite on new bone formation. Additionally, the study compared these materials for infection, resorption, biocompatibility, immune reaction, fi brotic encapsulation, foreign body reaction and physical attachment. Forty, fi ve-month-old female Wistar Albino rats...

Carbonate apatite (CO3Ap), the form of apatite found in bone, has recently attracted attention. The purpose of the present study was to histologically evaluate the tissue/cellular response toward the low-crystalline CO3Ap fabricated using a dissolution-precipitation reaction with set gypsum as a precursor. When set gypsum was immersed in a 100°C 1 mol/L Na3PO4 aqueous solution for 24 h, the set...

Abstract A defect structure and osseointegration capacity of sodium chloride co-substituted hydroxyapatite (NaClAp) were newly studied. The NaClAp was prepared by reacting H 3 PO 4 Ca(OH) 2 with NaNO NH Cl followed sintering; pure (HAp) synthesized as a control. After sintering, the co-substitution Ca OH Na Cl, respectively, produced charged point defects at sites. Also, molecules partially ado...

PURPOSE To evaluate the long-term results of cheekbone augmentation using porous hydroxyapatite granules mixed with microfibrillar collagen in a large group of patients. MATERIALS AND METHODS Four hundred thirty patients who underwent zygomatic augmentation and intermaxillary osteotomy were evaluated clinically, radiologically, and histologically. RESULTS Complications were found in 13 pati...

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...

Various calcium phosphates (hydroxyapatite, α- and β-tricalcium phosphate, brushite) containing silver or gallium ions were synthesized via standard methods subjected to physicochemical analysis by Fourier transform infrared spectroscopy (FT-IR), powder X-ray diffractometry (PXRD), atomic absorption spectrometry (AAS). In the next step, obtained phosphate powders, sodium alginate, chondroitin u...

The aim of this work was to compare the osteogenicity of calcium phosphate ceramic granules with autologous bone graft in ectopic and orthotopic sites. Biphasic calcium phosphate (BCP) granules composed of hydroxyapatite (HA) and beta-tricalcium phosphate (beta-TCP) in a 60/40 ratio were sintered at 1050, 1125 and 1200 degrees C, producing different microporosities. Either BCP ceramic granules ...