Chlorapatite Glass‐Ceramics

Abstract

Apatite glass‐ceramics are attractive for medical and dental applications, and fluorapatite glass‐ceramics based on aluminosilicate glasses have been extensively studied. This study is the first study of chlorapatite glass‐ceramics based on calcium chloride‐containing Q2 bioactive phosphosilicate glasses. The crystallization behavior of oxychloride glasses is examined and compared with mixed oxychloride/fluoride and oxyfluoride glasses. The glass transition temperature decreased for all three series with increasing halogen content. On increasing the halogen content, there was an increasing tendency of the glasses to crystallize. The halogen‐free glass surface crystallized to pseudowollastonite and an apatite. On incorporating a halide, the glasses exhibited largely bulk crystallization to a haloapatite. In the case of chloride, the glasses crystallized to chlorapatite. This is the first time to our knowledge that chlorapatite has been shown to crystallize from a glass. Chlorapatite is very attractive for medical applications because it converts to hydroxyapatite the mineral phase of tooth and bone on immersion in water.

Characterization of bioactive glass‐coated carbon nanotubes prepared by solgel process

“…The SBF composition was made according to the protocol described by Kokubo et al 23 After the immersing course, the samples were dried in an oven at 80°C for 12 hours. SBF immersion was used to examine the apatite-forming ability of the BG or BG/CNT-COOH powders that were soaked in SBF solution at 37°C for 1, 3, 7, and 21 days.…”

Bioactive Glasses—Structure and Properties

“…[189] So far, only the 45S5 composition has been used in oral health applications,b ut it has been suggested that it may actually be too hard and thus too abrasive for use in dentifrices. [191] 6. [191] 6.…”

History and trends of bioactive glass‐ceramics

“…Recently, Chen et al under the supervision of Robert G. Hill reported on the development and characterization of new bioactive GCs based on chlorapatite. They believed that chlorapatite GC would be more interesting than fluorapatite for medical and dental applications, because it is more soluble than fluorapatite and will convert completely to hydroxyapatite in the presence of water .…”