Bogdan CULICCristina GASPARIKAdrian Mihai VARVARĂCarina CULICCristian Mihai DRAGOȘLaura SILAGHI DUMITRESCUDiana DUDEA2024-10-162017-03-30F. Beuer, J. Schweiger, D. Edelhoff, British Dental Journal, 2008, 204, 505. S.B. Nathan, B. Aaronson Heidi, Compedium, 2008, 29, 494. P. Feuerstein, S. Puri, Oral Health, 2009, 99, 65. A. Coldea, M.V. Swain, N. Thiel, Dental Materials, 2013, 29, 419. A. Awada A., D. Nathanson, Journal of Prosthetic Dentistry, 2015, 144, 587. N.D. Ruse, M.J. Sadoun, Journal of Dental Research, 2014, 93, 1232. A. Della Bona, P. Corazza, Yu Zhang, Dental Materials, 2014, 30, 564. D. Fasbinder, G. Neiva, Journal of Esthetic and Restorative Dentistry, 2016, 28, 66. S.B. Turker, T. Biskin, Journal of Prosthetic Dentistry, 2003, 89, 466. O. Polydorou, E. Hellwig, TM Auschill, Operative Dentistry, 2006, 31, 473. S. Ourique, C. Arrais, A. Cassoni, C. Tsuzuki-Ota, J.A. Rodrigues, Brazilian Oral Research, 2011, 25, 453. M. Goldberg, M. Grootveld, E. Lynch, Clinical Oral Investigations, 2010, 14, 1. T. Attin, C. Hanning, A. Wiegand, R. Attin, Dental Materials, 2004, 20, 852. P. Wttanapayungkul, A.U. Yap, Operative Dentistry, 2004, 29, 398. A.F. Lima, A.P. Ribeiro, D.G. Soares, N.T. Sacono, J. Hebling, C.A. De Souza, Acta Odontologica Scadinavica, 2013, 71, 1319. I. Baldea, D. Olteanu, A. Filip, M. Cenariu, D. Dudea, A. Tofan, C. Alb, M. Moldovan, Clinical Oral Investigation, 2016 [Epub ahead of print]. DOI:10.1007/s00784-016-1882-4 R. Ghinea, MM. Pérez, L.J. Herrera, M.J. Rivas, A. Yebra, R.D. Paravina, Journal of Dentistry, 2010, 38, 57. M.M. Pérez, R. Ghinea, M.J. Rivas, A. Yebra, A. Ionescu, R.D. Paravina, L.J. Herrera, Dental Materials, 2016, 32, 461. A. Petran, T. Radu, B. Culic, R. Turcu, Applied Surface Science, 2016, 390, 1. A.U. Guler, F. Yilmaz, T. Kulunk, E. Guler, S. Kurt, Journal of Prosthetic Dentistry, 2005, 94, 118. R. Bagheri, M.F. Burrow, M. Tyas, Journal of Dentistry, 2005, 33, 389. A. Alharbi, S. Ardu, T. Bortolotto, I. Krejci, Odontology, 2016, DOI:10.1007/s10266-016-0258-1. C. Gaspari, A.G Grecu, B. Culic, M.E. Badea, D. Dudea, Journal of Esthetetic and Restorative Dentistry, 2015, 27, 285. K.J. Anusavice, Degradability of Dental Ceramics, 1992, 6, 82. S. Marto, C. Coito, A. Pequeno, Al. Cavalheiro, Revista Portuguesa de Estomatologia, Medicina Dentaria Cirurgia Maxillofacial, 2012, 53, 7. A.A. Zaki, N.Z. Fahmy, Journal of Prosthodontics, 2009, 18, 223. A.D. Vanderlei, S.P. Passos, S.M. Salazar-Marocho, S.M. Pereira, V.Z. Vásquez, M.A. Bottino, Acta Odontologica Latinoamericana, 2010, 23, 257. A.V. Burde, S. Cuc, A. Radu, M.A. Rusu, C.S. Cosma, R.S. Câmpian, D. Leordean, Studia UBB Chemia, 2016, 61, 205.1224-7154(online): 2065-9520http://dspace.chem.ubbcluj.ro:4000/handle/20.500.14637/10STUDIA UBB CHEMIA, LXII, 1, 2017 (p. 61-71), DOI:10.24193/subbchem.2017.1.05 Bogdan CULIC Department of Prosthetic Dentistry and Dental Materials, Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj Napoca, Romania, bculic@umfcluj.ro https://orcid.org/0000-0002-9350-7892 Cristina GASPARIK Department of Prosthetic Dentistry and Dental Materials, Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj Napoca, Romania *Corresponding author: gasparik.cristina@umfcluj.ro https://orcid.org/0000-0001-9271-9589 Adrian Mihai VARVARĂ Department of Prosthetic Dentistry and Dental Materials, Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj Napoca, Romania, varvara.mihai@umfcluj.ro https://orcid.org/0000-0001-9271-9589 Carina CULIC Department of Prosthetic Dentistry and Dental Materials, Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj Napoca, Romania, carina.culic@umfcluj.ro Cristian Mihai DRAGOȘ Department of Statistics, Faculty of Economics and Business Administration, Babes-Bolyai University, Cluj-Napoca, Romania, cristian.dragos@econ.ubbcluj.ro https://orcid.org/0000-0003-1552-0490 Laura SILAGHI DUMITRESCU Raluca Ripan Chemistry Research Institute, Babes-Bolyai University, Cluj-Napoca, Romania, lauraiulia2000@yahoo.com https://orcid.org/0000-0001-9060-8463 Diana DUDEA Department of Prosthetic Dentistry and Dental Materials, Faculty of Dental Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania, ddudea@umfcluj.ro https://orcid.org/0000-0002-9080-9625The objective of our study was to test the bleaching effect of two whitening gels, on stained hybrid ceramic material used for Computer Aided Design/ Computer Aided Manufacturing technology. 40 rectangular specimens 12/14/1mm were prepared form Vita Enamic blocks. All specimens were accelerated stained, and distributed in two groups. Group 1 was bleached using Opalescence PF 15% (Ultradent, USA), group 2 was bleached using an experimental gel containing natural products. ΔE* (used to asses the color changes) was above the perceptibility threshold of 1.2 in 40%; and the WID (used to asses the bleaching process in dentistry) showed high units for both bleaching gels. Hybrid ceramics staining showed moderate results, while the bleaching effect was present, with no statistical difference between the discolorations produced by the two bleaching gels (p<0.05). SEM images showed that the bleaching gels did not affect the surface structure of the material.enCAD/CAMhybrid ceramicspolymerbleachingcolorSEMArticle