[Fracture resistance of thin-walled teeth restored with different post and core materials].

Purpose: To discuss the selection of appropriate post and core materials in order to obtain better fracture resistance for thin-walled teeth.

Methods: Ninety maxillary incisors were endodontically treated and the crowns were cut off. Then they were randomly divided into 9 groups.

Amperometric sensor based on ferrocene-modified multiwalled carbon nanotube nanocomposites as electron mediator for the determination of glucose.

A kind of nanocomposite with good dispersion in water was prepared through covalent adsorption of ferrocenecarboxaldehyde on multiwalled carbon nanotubes (MWNTs) for electrical communication between glucose oxidase (GOD) and electrode. The ferrocene-modified multiwalled carbon nanotube nanocomposites (MWNTs-Fc) could be conveniently cast on electrode surfaces. With the aid of chitosan, GOD was then immobilized on the nanostructure film to form a reagentless amperometric sensor for glucose determination.