[1] Iuliu Hatieganu Univ Med & Pharm, Dept Conservat Odontol, 33 Motilor St, Cluj Napoca 400001, Romania
[2] Babes Bolyai Univ, Raluca Ripan Inst Res Chem, Dept Polymer Composites, 30 Fantanele St, Cluj Napoca 400294, Romania
[3] Iuliu Hatieganu Univ Med & Pharm, Dept Prosthet Dent & Dent Mat, 32 Clin St, Cluj Napoca 400006, Romania