1. COMPARATIVE IN VITRO STUDY OF THE DIFFERENT ORTHODONTIC BRACKETS USING TWO ETCHING TECHNIQUES. Authors: MIHAELA PĂSTRAV, ANDREA MARIA CHISNOIU, OVIDIU PĂSTRAV, LAURA SILAGHI DUMITRESCU, CODRUTA SAROSI, VIORICA TARMURE.2. SURFACE CHARACTERIZATION AND CYTOTOXICITY ANALYSIS OF THE TITANIUM ALLOYS FOR DENTISTRY. Authors: PAULA ARGENTINA JIMAN, MARIOARA MOLDOVAN, CODRUTA SAROSI, ALEXANDRINA MUNTEAN, ANDREEA SIMONA POP, VIORICA TARMURE, CATALIN POPA, AUREL GEORGE MOHAN.