Mechanical properties of composites as functions of the syringe storage temperature and energy dose
J. appl. oral sci
; 23(2): 120-128, Mar-Apr/2015. tab, graf
Article
en En
| LILACS, BBO
| ID: lil-746540
Biblioteca responsable:
BR1.1
ABSTRACT
Objective:
To investigate the mechanical properties of different classifications of composites indicated for posterior application as functions of the storage condition and of the energy dose. Material andMethods:
Specimens (8x2x2 mm) were obtained according to the factors I) Composites (3M ESPE) Filtek P60, Filtek Z350XT, and Filtek Silorane; II) Syringe storage conditions room temperature, aged, oven, refrigerator, and freezer; and III) Energy dose 24 J/cm2 and 48 J/cm2. After photoactivation, the specimens were stored at 37ºC for 24 h. After storage, a three-point bending test was carried out in a universal testing machine at 0.5 mm/min. Flexural strength (S) and flexural modulus (E) were calculated. Data were analyzed by three-way ANOVA and Tukey's test (α=0.05).Results:
Different storage conditions significantly affected the silorane composite for S; conversely, no effects were noted in terms of E. The accelerated aging protocol significantly increased the S of Filtek P60 and Filtek Silorane, whereas storage in the oven significantly decreased the S for all of the composites tested. Filtek P60 was the only composite not affected by the lower storage temperatures tested for S, whereas for the silorane this parameter was impacted at the same conditions. The factor "dose" was not statistically significant.Conclusions:
The syringe storage at different temperature conditions proved to influence mostly the flexural strength, a clinically important characteristic considering the posterior indication of the materials tested. The silorane composite should not be stored at lower temperatures. .Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
BBO
/
LILACS
Asunto principal:
Contaminación de Alimentos
/
Alimentos Infantiles
/
Nitratos
Tipo de estudio:
Etiology_studies
/
Guideline
/
Risk_factors_studies
Límite:
Humans
/
Infant
País/Región como asunto:
Europa
Idioma:
En
Revista:
J. appl. oral sci
Asunto de la revista:
ODONTOLOGIA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Brasil