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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

Fall 2000
Volume 2 , Issue 3



Pages: 223-228
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Marginal Microleakage in Bonded Amalgam Restorations: A Combined In Vivo and In Vitro Study.

Di Lenarda, Roberto; Cadenaro, Milena; Gregorig, Gianluca; Dorigo, Eletttra De Stefano

Purpose: This study evaluated the marginal microleakage m bonded amalgam restorations in teeth extracted a month after restoration placement Materials and Methods; Nine teeth in a patient scheduled for complete extraction were selected. In each tooth, a buccal prepared cavity was treated With Scotchbond Plus and filled with high copper amalgam. In four teeth, a lingual unllned restoration was also prepared as control. A month later, all the teeth were ex- tracted; seven teeth were immersed far 48 hours m a 0.05% basic fucsine dye solution and then sectioned. Sections were observed with a stereomicroscope at 10X. Results were statistically evaluated using a non parametric Mann-Whitney test for independent data. The remaining two teeth were sectioned and observed using a scanning electron microscope (SEM). Results: Stereomicroscopic analysis revealed that 80% of bonded specimens did not exhibit dye infiltration at the enamel margin: the same percentage of bonded specimens showed partial infiltration at the cervical margin, in the unlined control specimens, there was a complete dye infiltrationn at both margins. SEM analysis revealed a- good adaptation between resin and tooth and between resin and amalgam. Conclusion: Bonded amalgam restorations are effective in reducing marginal microleakage, particularly at the enamel margin.

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