1. OPTICAL PROPERTIES AND MICROSTRUCTURAL CHANGES OF HARD DENTAL TISSUES IN GASTRO-ESOPHAGEAL REFLUX DISEASE PATIENTS. Authors: RADU CHISNOIU, MARIOARA MOLDOVAN, MIHAELA PĂSTRAV, OVIDIU PĂSTRAV, MONICA LAURA DASCĂLU (RUSU), ANDREA MARIA CHISNOIU, OLGA HILDA ORASAN.2. 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.3. IN VITRO STUDIES ON ENAMEL AND DENTIN ADHESION OF COMPOSITE RESINS IN PATIENTS WITH CHRONIC KIDNEY FAILURE AND HEALTHY PATIENTS. Authors: GEORGIANA FLORENTINA GHEORGHE, OANA ELENA AMZA, IOANA SUCIU, BOGDAN DIMITRIU, LILIANA GARNEATA, ANDREA MARIA CHISNOIU, DOINA PRODAN, MIHAELA PĂSTRAV, SANDA ILEANA CIMPEAN, RADU CHISNOIU.