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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

December 1994
Volume 25 , Issue 12

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Micromorphologic relationship between resin and dentin in Class II restorations: An in vivo and in vitro investigation by scanning electron microscopy Volume 26


Pages: 861-866
PMID: 7568696

The wetting property of dentinal bonding systems may play an important role in the mechanism of adhesion to dentin. Some studies have observed that tags penetrate 100 um or more in nonvital teeth and less than 10 um in vital teeth. This investigation was designed to evaluate the micromorphologic relationship between in vivo and in vitro dentin after application of two new dentinal bonding systems in Class II restorations. Class II cavities were restored in vitro and in vivo with Gluma 2000 adhesive and Pekafill hybrid resin or Scotchbond Multipurpose adhesive and Z100 composite resin. After dissolution of dental structures, the restorations were observed with a scanning ele ctron microscope. No morphologic differences were found be tween in vivo and in vitro specimens with either of the new dentinal adhesive systems tested. Short resin tags were often found in vivo, particularly at the cavity walls. Only a few areas in vivo had deep resin tags (longer than 100 um) and these were always at the cavity floor

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