Ir
a la edición de Setiembre 2003
Revise
otros articulos
|
Revista
Virtual ODONTOLOGIA CLINICA (ISSN 1728-1245) |
|
Año
01 Número 04 Setiembre 2003 |
Resumen
de artículo
Microfiltración en amalgamas
Se
conoce microfiltración marginal es Statement
of problem The penetration of oral fluids and bacteria at the interface
between the preparation walls and amalgam restorations, known as marginal
microleakage, continues to be a problem in restorative dentistry.
Microleakage may result in secondary caries and the irritation of the
pulp. PURPOSE: This study evaluated the effect of amalgam type, adhesive
system, and storage period on microleakage of amalgam restorationsMaterial
and methods Eighty human premolars and molars were divided randomly into 8
equal groups of 10 teeth each. A combination of 2 different types of
amalgam alloys (Spherodon and Nogama-2) and 2 bonding agents (Resinomer
and High-Q-Bond) were used to restore Class V preparations. After
thermocycling for 750 cycles (4 degrees C and 60 degrees C for 1-minute
dwell times), the teeth were stored in a corrosive solution (modified
Fusayama solution). The mean depth of fuchsin dye penetration was
evaluated after an immersion period of 14 days and 180 days. The data were
analyzed with a 3-way analysis of variance model and Wilcoxon paired
signed rank test (alpha=.05). Main effects (aging time, amalgam, and
adhesive), as well as possible interactions, were included in the model.
RESULTS: Significant differences were found in all analyzed combinations.
The 3-way interaction between time, restoration, and adhesive was
significant (P=.04 and P=.015 for the cervical and occlusal margin,
respectively). After long-term storage, dye penetration values decreased
in all groups and reached a lower level compared with short-term storage
(range of 0.42 mm to 0.83 mm versus 0.61 mm to 3.6 mm for the long and
short term, respectively). CONCLUSION: An adhesive bonding agent may
affect microleakage in the short term. However, in the long term the
effect of the adhesive does not appear to be the dominant factor in
reducing microleakage around amalgam restorations.
Referencias
bibliográficas: Ziskind
D, Venezia E, Kreisman I, Mass E. Amalgam type, adhesive system, and
storage period as influencing factors on microleakage of amalgam
restorations. J
Prosthet Dent. 2003 Sep;90(3):255-60.
Sección: Operatoria dental, Materiales dentales
