A clinical case--a follow-up clinical and histological study--is presented in this paper, which describes the use of resorbable hydroxylapatite [OsteoGen (H.A. Resorb), Impladent, Inc., & GBD Marketing Group, Inc., Medical Division, Valley Stream, NY 11580] for the repair of a large mandibular lesion, followed by the placement of an endosseous dental implant six weeks after the graft placement....

By theoretical modeling and X-ray absorption spectroscopy, the local coordination structure of Zn incorporated into hydroxylapatite was examined. Density function theory (DFT) calculations show that Zn favors the Ca2 site over the Ca1 site, and favors tetrahedral coordination. X-ray absorption near edge structure (XANES) spectroscopy results suggest one dominant coordination environment for the...

Conjugates of biotin with the decamer of glutamic acid (glu10) and the trimer of D,L-2-amino-5-phosphonovaleric acid (I) have been synthesized, and it has been shown that they mediate the binding of avidin to hydroxylapatite. In a similar way a conjugate of methotrexate with glu10 mediates the binding of dihydrofolate reducatase to the mineral. The presentation of ligands on the hydroxylapatite...

The extracellular endo-1,4-beta-glucanase components of Ruminococcus flavefaciens FD-1 were analyzed by high-performance liquid chromatography (HPLC) by using DEAE ion-exchange, hydroxylapatite, and gel filtration chromatography and polyacrylamide gel electrophoresis (PAGE). Two endo-1,4-beta-glucanase peaks were resolved by DEAE-HPLC and termed endoglucanases A and B. Carboxymethyl cellulose (...

OBJECTIVE To evaluate histologically the extent and character of tissue in-growth after injection of calcium hydroxylapatite for soft-tissue augmentation. METHODS Prospective case series of 8 patients from a private facial plastic surgery practice. Each patient was injected subdermally between the dermis and the subcutaneous fat with 0.1 mL of calcium hydroxylapatite in the superior postauric...

Hydrothermal process has been applied for effective production of Hydrogen from biowastes. In this study hydrothermal process for production of valuable Hydroxylapatitefrom chicken manure containing phosphorus was focused on. Conditions of 400 ̊C and 26 27 MPa with addition of 1 mmol Ca(OH)2 were determined as the optimal by using Ophospho-DL-serine as a model compound. Afterwards, the real biow...

Fossils not only provide the geologic record of evolution, they also remind us of the crucial role that mineralized tissues play in the biology of organisms. Mineralized tissues are composite structures consisting of an inorganic mineral phase, an organic phase, and cells. In this article, I provide an overview of the mineral–matrix relationships in bones and teeth, highlight the significant di...

INTRODUCTION Medialization thyroplasty is a useful tool in the management of dysphonia and dysphagia with aspiration secondary to unilateral vocal fold impairment. A variety of implant materials have been used for medialization thyroplasty including silicone elastomer (Silastic, Dow Corning Corporation, Midland, MI), expanded polytetrafluoroethylene (Gore-Tex, Gore, Newark, DE), and hydroxylapa...

A protein kinase has been purified from the bovine corpus luteum by acid precipitation, ammonium sulfate fractionation and chromatography on DEAE-cellulose and hydroxylapatite columns. The enzyme has a molecular weight of approximately 159,000. DEAE-cellulose chromatography resolved the protein kinase activity into two peaks, designated as KI and KII. Both peaks possessed adenosine 3’,5’-monoph...

A protein kinase has been purified from the bovine corpus luteum by acid precipitation, ammonium sulfate fractionation and chromatography on DEAE-cellulose and hydroxylapatite columns. The enzyme has a molecular weight of approximately 159,000. DEAE-cellulose chromatography resolved the protein kinase activity into two peaks, designated as KI and KII. Both peaks possessed adenosine 3’,5’-monoph...