Effect of bonding application time on the microleakage of Class V sandwich restorations.
Aust Dent J
; 57(3): 334-8, 2012 Sep.
Article
en En
| MEDLINE
| ID: mdl-22924357
ABSTRACT
BACKGROUND:
The aim of this study was to assess the effect of bonding application time on the microleakage of Class V sandwich restorations.METHODS:
Eighty non-carious third molars were randomly divided into 16 groups. Two Class V cavities were prepared on the buccal and lingual surfaces of teeth. Three groups were restored with Fuji II GIC and treated with a total-etch bonding system (Stea/SDI) immediately after insertion, at 7 minutes and 15 minutes after mixing the glass ionomer cements (GICs). Another three groups were restored with Riva Self Cure GIC and treated with the total-etch system identically. The other six groups were subjected to self-etching bonding (Frog/SDI) after GIC placement in an identical procedure. The remaining groups were made using light cure GICs (Fuji II or Riva Light Cure) in conjunction with the total-etch or self-etching systems. Cavities were then restored with composite (Valux plus, 3M/ESPE). Samples were subsequently immersed in 2% methylene blue solution for 48 hours and observed under a stereomicroscope after sectioning. Four-scale grading was used to assess microleakage in occlusal and gingival walls. Data were analysed using Kruskal-Wallis and Mann-Whitney tests.RESULTS:
The self-etching bonding system exhibited more microleakage in occlusal margins regardless of time. Over time, microleakage significantly decreased in gingival margins in all self-cure groups except for Riva Self Cure treated with the total-etch system (p < 0.05).CONCLUSIONS:
Bonding application time had no effect on the microleakage of occlusal margins. However, maturation of GICs induced a decreased microleakage in gingival margins.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Recubrimientos Dentinarios
/
Filtración Dental
/
Restauración Dental Permanente
/
Grabado Dental
/
Cementos de Ionómero Vítreo
Idioma:
En
Revista:
Aust Dent J
Año:
2012
Tipo del documento:
Article
País de afiliación:
Irán