[The dentinal smear layer. Characteristics and interactions. 2]. / Il fango dentinale. Caratteristiche ed interazioni. Parte II.

The Authors, after the presentation (in the first part of the Dossier) of a large literature review about the physical, chemical and clinical characteristics of formation, interaction, remotion of "smear layer" during cavity preparation in hard tooth tissue, describe the results of a scanning microelectronic research about the action as cleanser (for the dentinal cavity wall) of the CK101 (Caridex) versus wather, Tubulicid and phosphoric acid. The experimental results obtained "in vitro" show that the substance has relative action, without removing the tubular portion of "smear layer".

[Action of etching acid on lining materials]. / Azione della mordenzatura acida su materiali da sottofondo.

A review was made of the literature concerning intermediate materials for composite resin fillings and the possibilities of ortho-phosphoric acid infiltration. An experimental study was aimed at evaluating the damages caused by the acid action of the etching material on various type of base materials used. In conclusion, various procedures are suggested for composite resin restoration in order to avoid the risks of lesions of the pulp-dentin organ.