A sintered hydroxyapatite (HAP) ceramic for use in wear studies was prepared from a commercial tricalcium phosphate. The sintered HAP had physical properties close to those of human enamel. The coefficient of friction and wear of the sintered HAP ceramic as characterized by tangential force, track width, and surface failure data, approximated those of human enamel.

A fast, efficient and novel method of preparation of hydroxyapatite using microwaves has been described.

composite Impregnated with Bone Morphogenetic Protein-2 Takashi Taniyama, Shinichi Sotome, Tsuyoshi Yamada, Tomokazu Masaoka, Toshitaka Yoshii, Tomoji Takayama, Yuko Kozaka, Takehiko Nakajima, Atsushi Okawa. Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan, Development Division of Advanced Orthopaedic Therapeutics, Graduate School, Tokyo Medical and Dental Un...

Dissolution rate studies were conducted with hydroxyapatite and enamel in the presence of adsorbed surfactants. In general, the ability of the surfactant to retard the dissolution rate was directly related to its ability to adsorb onto apatite. Cetylpyridinium chloride adsorbed poorly onto apatite, and its influence on the dissolution rate was marginal. The long-chain protonated amines were muc...

The aim of this study was to compare the characteristics of the bone-to-implant interface of hydroxyapatite-coated and non-coated commercially pure titanium threaded implants after different periods of healing in humans. To eliminate possible variations of the results from differences in bone quality and in surgical techniques used in the different test and control sites, only one half of each ...

An electric-current-assisted method was used to mineralize dense hydrogels and create hydroxyapatite/hydrogel composites with unique hierarchical structures. The microstructure of the final material can be controlled by the mineralization technique and the chemistry of the organic matrix. A hydroxyapatite/hydrogel composite was obtained with a large inorganic content (approximately 60% of the w...

PURPOSE To evaluate and compare clinically and radiographically use of hydroxyapatite crystals and 2% glutaraldehyde as a pulpotomy agent. METHOD Thirty deciduous molars were treated with pulpotomy using hydroxyapatite crystals and 2% glutaraldehyde. RESULTS Clinical and radiographic findings were observed at three months and six months. The success rate was found to be 100% clinically and ...