| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312772 |
| ISSN: | 1516-1439 |
| Autores: | Paraizo, Marcio Antonio1 Miranda, Mauro Sayao de Mendes, Luis Claudio2 Gomes, Ailton de Souza Amaral, Ana Claudia Fernandes3 |
| Instituciones: | 1Universidade Federal do Rio de Janeiro, Faculdade de Odontologia, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Instituto de Macromoleculas Professora Eloisa Mano, Rio de Janeiro. Brasil 3Fundacao Oswaldo Cruz, Rio de Janeiro. Brasil |
| Año: | 2004 |
| Periodo: | Oct-Dic |
| Volumen: | 7 |
| Número: | 4 |
| Paginación: | 639-642 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | New types of copolymers using monomers which form inorganic polymers network (glass-like) and organic networks have been developed, known as ormocers. The aim of this work was to study how a particular dental filling material is degraded when subjected to a caries challenge by using low pH solutions. The supernadants were studied by HPLC to detect the presence of molecules from the resin, while the changes of the material surface were evaluated by contact angle. An organic modified ceromer (ormocer) called Definite® (Degussa ) was tested. Samples were built following manufacturer's instructions. After pH cycles, solutions were injected in a HPLC. The contact angle was obtained using a goniometer after and before the cycles. HPLC results showed material degradation, only detected in acid solutions. Bis-GMA and TEGDMA were detected in Definite® residues. Means and S.D. of contact angle were (p < 0,05): baseline: 85.16° ± 3.90° and after pH cycles: 69.77° ± 7.12°. The authors concluded that an ormocer filling material degraded on a caries simulated environment |
| Disciplinas: | Ingeniería, Medicina, Química |
| Palabras clave: | Ingeniería de materiales, Odontología, Química de polímeros, Resinas compuestas, Resistencia, Degradación, Caries |
| Keyword: | Engineering, Medicine, Chemistry, Materials engineering, Dentistry, Polymer chemistry, Composite resins, Resistance, Degradation, Caries |
| Texto completo: | Texto completo (Ver HTML) |
