Fluoride release of glass ionomer restorations after bleaching with two different bleaching materials.

Objective: This study was designed to evaluate the effect of two bleaching agents on the fluoride release of three types of glass ionomer materials.

Materials And Methods: A total of 90 specimens of the tested materials (Ketac Fil, Photac Fil and F2000) were prepared by a split Teflon ring with an internal diameter of 5 mm and thickness of 2 mm. The tested materials were applied and bleached according to manufacturer instructions.

Cryosurgery of the oral and peri-oral region: a literature review of the mechanism, tissue response, and clinical applications.

Cryosurgery is a method of achieving lesion destruction by rapid freezing in situ. Application of cryosurgery in medicine widespread and its use within dentistry is also well documented, using both open and closed liquid nitrogen and carbon dioxide. The major advantages of oral cryosurgery include bloodless treatment, very low incidence of secondary infection, and a relative lack of scarring and pain.