Anelise F Montagner1, Niek J M Opdam2, Jan L Ruben2, Ewald M Bronkhorst2, Maximiliano S Cenci3, Marie-Charlotte D N J M Huysmans2. 1. School of Dentistry, Department of Restorative Dentistry, Federal University of Pelotas, Gonçalves Chaves 457, 96015-560 Pelotas, RS, Brazil; College of Dental Sciences, Department of Preventive and Restorative Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands. Electronic address: animontag@gmail.com. 2. College of Dental Sciences, Department of Preventive and Restorative Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands. 3. School of Dentistry, Department of Restorative Dentistry, Federal University of Pelotas, Gonçalves Chaves 457, 96015-560 Pelotas, RS, Brazil.
Abstract
OBJECTIVE: This in vitro study aimed to compare dentin wall caries development at different composite-dentin interfaces. METHODS: Dentin samples (10.4 mm(2)) were restored with composite resin using two adhesive systems (etch-and-rinse and self-etch techniques). Different composite-dentin interfaces with gaps were produced: (a) failed bonded, which were fractured at interface after being submitted to aging protocols (no aging, mechanical loading or water storage); (b) non-bonded interfaces, both without any adhesive material or with adhesive material applied only on the dentin. Adhesively fractured and non-bonded samples were subjected to a lactic acid gel (pH=5) caries model with a continuous opening/closing movement of the interfacial gap for 10 days. Transverse wavelength-independent microradiographs were taken, and lesion depth and mineral loss were measured. Data were analyzed with linear mixed-effects regression models. RESULTS: Caries development differed among the composite-dentin interfaces (p<0.001). The non-bonded interface with adhesive material on the dentin showed less lesion depth than the failed bonded groups, while the non-bonded interface without adhesive on dentin showed the deepest wall lesions. Difference between the adhesive systems was observed only in the non-bonded groups (p=0.003), with the self-etch adhesive applied on the dentin showing more severe lesions. Samples broken after mechanical loading aging showed deeper lesions than those broken after water storage (p<0.001). SIGNIFICANCE: Composite-dentin interfaces failed after aging presented different demineralization from interfaces that were never bonded, indicating that the restorative treatment changes the tissue in a way relevant to secondary caries development.
OBJECTIVE: This in vitro study aimed to compare dentin wall caries development at different composite-dentin interfaces. METHODS: Dentin samples (10.4 mm(2)) were restored with composite resin using two adhesive systems (etch-and-rinse and self-etch techniques). Different composite-dentin interfaces with gaps were produced: (a) failed bonded, which were fractured at interface after being submitted to aging protocols (no aging, mechanical loading or water storage); (b) non-bonded interfaces, both without any adhesive material or with adhesive material applied only on the dentin. Adhesively fractured and non-bonded samples were subjected to a lactic acid gel (pH=5) caries model with a continuous opening/closing movement of the interfacial gap for 10 days. Transverse wavelength-independent microradiographs were taken, and lesion depth and mineral loss were measured. Data were analyzed with linear mixed-effects regression models. RESULTS: Caries development differed among the composite-dentin interfaces (p<0.001). The non-bonded interface with adhesive material on the dentin showed less lesion depth than the failed bonded groups, while the non-bonded interface without adhesive on dentin showed the deepest wall lesions. Difference between the adhesive systems was observed only in the non-bonded groups (p=0.003), with the self-etch adhesive applied on the dentin showing more severe lesions. Samples broken after mechanical loading aging showed deeper lesions than those broken after water storage (p<0.001). SIGNIFICANCE: Composite-dentin interfaces failed after aging presented different demineralization from interfaces that were never bonded, indicating that the restorative treatment changes the tissue in a way relevant to secondary caries development.
Authors: N K Kuper; F H van de Sande; N J M Opdam; E M Bronkhorst; J J de Soet; M S Cenci; M C D J N M Huysmans Journal: J Dent Res Date: 2014-10-08 Impact factor: 6.116
Authors: Paulo A Da Rosa Rodolpho; Tiago A Donassollo; Maximiliano S Cenci; Alessandro D Loguércio; Rafael R Moraes; Ewald M Bronkhorst; Niek J M Opdam; Flávio F Demarco Journal: Dent Mater Date: 2011-07-16 Impact factor: 5.304
Authors: Paulette Spencer; Qiang Ye; Jonggu Park; Elizabeth M Topp; Anil Misra; Orestes Marangos; Yong Wang; Brenda S Bohaty; Viraj Singh; Fabio Sene; John Eslick; Kyle Camarda; J Lawrence Katz Journal: Ann Biomed Eng Date: 2010-02-27 Impact factor: 3.934
Authors: André L Faria-E-Silva; Andressa Dos Santos; Angela Tang; Emerson M Girotto; Carmem S Pfeifer Journal: Dent Mater Date: 2018-06-20 Impact factor: 5.304