Influence of four systems for dental bleaching on the bond strength of orthodontic brackets.

Objective: To compare the influence of four systems for dental bleaching on the shear bond strength (SBS) of orthodontic brackets.

Materials And Methods: One-hundred and fifty freshly extracted bovine teeth were randomly divided into five groups. In group I the teeth were untreated (control).

Cleido cranial dysplasia: report of a family.

A family case of Cleidocranial Dysplasia is presented. A mother and two adolescent girls were examined. In all three cases, a radiological series was performed over the entire body.