Inlay shading effect on the photopolymerization kinetic of a dental composite material used as bonding system in an indirect restoration technique.
Dent Mater
; 21(8): 689-94, 2005 Aug.
Article
em En
| MEDLINE
| ID: mdl-15963562
ABSTRACT
OBJECTIVES:
To define the inlay shading effect on the polymerization levels and kinetics of a light activated bonding system for an indirect restoration technique. MATERIALS ANDMETHODS:
For the bonding system, an adhesive Excite (Ivoclar-vivadent) and a composite Z250 (3M-ESPE, St Paul Minnesota, USA) were investigated. A Demetron (Kerr USA) light curing unit was used. The composite inlay blocks of 2 mm thick were used for the experiment (Artglass A2 Heraeus, Kulzer, Dormagen, Germany). The bonding composite was photocured using a 2 mm composite inlay block as a shielding system while the adhesive was shielded by a 2.3 mm thick wafer, composed of the inlay material and the previously cured bonding composite. The kinetics and levels of polymerization were measured by a differential scanning calorimeter technique (DSC 25, Mettler, Orange, CA, Toledoh, küsnacht, switzerland).RESULTS:
The inlay shielded dental composite reaches a significantly lower level of polymerization compared to the unshielded composite. Inlay shielded composite, has a slower polymerization kinetic compared to unshielded composite. The resin adhesive shielded by the inlay-composite wafer reaches polymerization values not significantly different from those of the unshielded adhesive. SIGNIFICANCES The degree of cure of the light-cured composite resins for use as a base for indirect composite restorations, may be severely reduced as a result of inlay shielding.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Colagem Dentária
/
Resinas Compostas
/
Restauração Dentária Permanente
/
Restaurações Intracoronárias
Limite:
Humans
Idioma:
En
Revista:
Dent Mater
Ano de publicação:
2005
Tipo de documento:
Article