Curing efficiency of various resin-based materials polymerized through different ceramic thicknesses and curing time
The Journal of Advanced Prosthodontics
;
: 126-131, 2011.
Artículo
en Inglés
| WPRIM
| ID: wpr-172526
ABSTRACT
PURPOSE:
The aim of this in vitro study was to examine the curing efficiency of various resin-based materials polymerized through ceramic restorations with 3 different thicknesses. Curing efficiency was evaluated by determining the surface microhardness (VHN) of the resin specimens. MATERIALS ANDMETHODS:
Four kinds of resin materials were used. Z350 (3M ESPE Filtek(TM) Z350 A2 Shade), Z250 (3M ESPE Filtek(TM) Z250 A2 Shade) and Variolink(R) II (VL Ivoclar vivadent, base transparent) either with or without a self-curing catalyst (VLC Ivoclar vivadent, catalyst low viscosity/transparent) were filled into the silicone mold (10 mm diameter, 1 mm thick). They were cured through ceramic discs (IPS e.max Press MO-0 ingot ivoclar vivadent, 10 mm diameter, 0.5, 1 and 2 mm thicknesses) by LED light-curing units for 20 and 40 seconds. Vicker's microhardness numbers (VHNs) were measured on the bottom surfaces by a microhardness tester. Data were analyzed using a 3- way analysis of variance (ANOVA) at a significance level of 0.05.RESULTS:
The thickness of ceramic disc increased, the VHNs of all four resin types were decreased (P<.05). The mean VHN values of the resins light cured for 40 seconds were significantly higher than that of LED for 20 seconds in all four resin materials (P<.05). VLC showed significantly higher VHN values than VL regardless of other conditions (P<.05). Z350 and Z250 showed higher values than VL or VLC (P<.01).CONCLUSION:
Thinner ceramic disc with increased curing time resulted higher VHN values of all resin materials. The use of a catalyst produced a greater hardness with all polymerization methods. Restorative resin materials (Z350, Z250) showed higher VHN values than resin cement materials (VL, VLC).
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Polímeros
/
Poliuretanos
/
Siliconas
/
Ceras
/
Resinas Acrílicas
/
Cerámica
/
Resinas Compuestas
/
Cementos de Resina
/
Polimerizacion
/
Hongos
Idioma:
Inglés
Revista:
The Journal of Advanced Prosthodontics
Año:
2011
Tipo del documento:
Artículo
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