Background: Oral microbiome biofilms can appear on all surfaces of the oral cavity as well restorative materials such Glass Ionomer Cement (GIC). GIC is considered superior because it has ability to produce fluoride, which a cariostatic effect, but fluoride produced inadequate inhibit growth biofilms, so modifications were made by adding hydroxyapatite from eggshell. Purpose: To evaluate levels...

Time-resolved energy dispersive X-ray diffraction (EDXRD) data have been measured in situ from cast blocks of gypsum, CaSO(4) x 2 H(2)O, in the presence of reactive phosphate solutions under hydrothermal conditions (100 < or = T < or = 180 degrees C) in order to understand the formation of hydroxyapatite monoliths, for applications such as in artificial bone or dental materials. Measurement of ...

BACKGROUND AND PURPOSE Hydroxyapatite ceramic microparticles are newly developed embolic materials. The purpose of this study was to evaluate the characteristics, embolic properties of hydroxyapatite ceramic microparticles, and effects of transcatheter embolization from an angiographic standpoint and to histopathologically evaluate the results of animal experimentation. METHODS After physical...

Liver cell culture within three-dimensional structures provides an improved culture system for various applications in basic research, pharmacological screening, and implantable or extracorporeal liver support. Biodegradable calcium-based scaffolds in such systems could enhance liver cell functionality by providing endothelial and hepatic cell support through locally elevated calcium levels, in...

OBJECTIVE To report hearing results using a titanium ossicular replacement prosthesis during canal wall down mastoidectomy with tympanoplasty to treat cholesteatoma. DESIGN Retrospective medical record review. SETTING Referral university hospital. PATIENTS Patients with cholesteatoma treated with primary or revision canal wall down mastoidectomy with tympanoplasty in a single stage. Patie...

Bone morphogenetic protein (BMP) is known to require a suitable carrier to induce ectopic bone formation in vivo. Hydroxyapatite ceramics have been reported to be effective in some forms but ineffective in others as a carrier of BMP-induced bone formation. In this study we compare three geometrically different forms of hydroxyapatite to examine their functions as carriers of BMP-induced bone fo...

The regeneration of large bone defects is an osteoinductive, osteoconductive, and osteogenic process that often requires a bone graft for support. Limitations associated with naturally autogenic or allogenic bone grafts have demonstrated the need for synthetic substitutes. The present study investigates the feasibility of using novel hollow hydroxyapatite microspheres as an osteoconductive matr...

This work focuses on studying the effect of sintering temperature ,pressing pressure and sintering time (soaking time) on phases generated, porosity and fracture strength of sintered HA powder compact at a range of (800-1200) ̊C , (38.378-153.513)Mpa and (1-5)hr respectively, and evaluation of sintered HA powder compact in synthetic body fluids(SBF), to indicate the biological bioactivity . Both...

Objective: The aim of this paper was to assess the relationships among chemical, phase and structural composition and etiopathogenic factors of non-infectious phosphate calculi formed in patients with low and high urinary phosphate concentrations, and to characterize the mechanism of their formation related on biochemical results. Material and Methods: Twelve samples of phosphate renal calculi ...

In this study, the mechanical properties of bioactive coatings on Ti6Al4V substrates were investigated using instrumented nanoindentation. The aim was to observe the differences in the mechanical properties before and after immersion in collagen solution. The hydroxyapatite coatings were prepared through two processes: self-assembly in simulated body fluid and a hydrothermal method. Sintered hy...