Owing to the development of high resolution scanners and the new possibility of whole body scanning in recent years positron emission tomography has become more and more important in diagnostic imaging, especially for the diagnosis of malignant tumors and their metastases. Positron emission tomography (PET) is a special nuclear medical imaging technique, which is quantitative (correcting for ra...

Nghiên cứu được thực hiện trên 758 trẻ em tại tỉnh Vĩnh Phúc, tuổi từ 2-4 tuổi, học 1 số trường mầm non Phúc. Mục tiêu: mô tả và đánh giá tình trạng sâu răng trước sau dự phòng ở một nhóm thành phố Yên, Phương pháp nghiên cứu: Mô cắt ngang can thiệp cộng đồng không đối chứng. Kết quả: Tỷ lệ mắc là 71,4%; dmft: 5,63±5,46; dmfs: 8,58±10,27; Sau Vecni fluor, có 47,2% mặt tổn thương mức 2 trở về bì...

The healing process after implantation of sintered bone in the rat parietal bone was compared with that of synthetic hydroxyapatite using both scanning electron and light microscopy. The results showed that the differences between the sintered natural bone and the synthetic hydroxyapatite implantations were in the states of bone union and the bioresorbability of the implanted materials, even th...

Crab's shells of Portunus pelagicus species were used as raw materials for synthesis of hydroxyapatite were used for protection against demineralization of teeth. Calcination was conducted to crab's shells of Portunus pelagicus at temperature of 1000°C for 5 hours. The results of calcination was reacted with (NH4)2HPO4, then dried at 110°C for 5 hours. Sintering was conducted to results of prec...

Poly (2-hydroxy ethyl) methacrylate (PHEMA) is a polymer that can be carboxymethylated to induce calcification on its surface. This mimics the calcification of bone matrix since the polymer surface induces the deposit of large hydroxyapatite calcospherites. We investigated the effect of Sr on hydroxyapatite crystals developed on PHEMA pellets. Pellets were incubated for 1 week in a synthetic bo...

AIMS To document the long term experience of bone derived hydroxyapatite orbital implants and compare results using scleral wrapped implants with those not using sclera. METHODS This retrospective case series reviewed the long term follow up of 118 patients with 120 eyes which had undergone enucleation and bone derived hydroxyapatite orbital implant insertion at Dunedin Hospital from 1977 unt...

OBJECTIVE The objective of this study is to develop a method for selective detection of the calcific (hydroxyapatite) component in human aortic smooth muscle cells in vitro and in calcified cardiovascular tissues ex vivo. This method uses a novel optical molecular imaging contrast dye, Cy-HABP-19, to target calcified cells and tissues. METHODS A peptide that mimics the binding affinity of ost...

Calcium hydroxyapatite can be a significant component of black pigment gallstones. Diverse molecules that bind calcium phosphate inhibit hydroxyapatite precipitation. Because glycine-conjugated bile acids, but not their taurine counterparts, bind calcium phosphate, we studied whether glycochenodeoxycholic acid inhibits calcium hydroxyapatite formation. Glycochenodeoxycholic acid (2 mM) totally ...