The effect of additional enamel etching and a flowable composite to the interfacial integrity of Class II adhesive composite restorations.

Abstract:

:This in vitro study evaluated the interfacial integrity of Class II resin composite restorations. The influence of a flowable composite and additional enamel etching was also evaluated. Deep, saucer-shaped Class II cavities were prepared in the mesial and distal proximal surfaces of 25 extracted human molars and assigned to five treatment groups. The gingival margins were extended to approximately 1 mm above the CEJ in 40 cavities and below the CEJ in 10 cavities. The prepared cavities were then restored with a self-etching primer system (Clearfil Liner Bond II) and a hybrid resin composite (Clearfil AP-X), with and without a flowable composite (Protect Liner F) and additional enamel etching with 37% phosphoric acid gel (K-etchant). After finishing, polishing and thermocycling (4 and 60 degrees C, x300), the samples were longitudinally sectioned through the restorations and resin-tooth interfaces were observed directly under a laser scanning microscope. Statistical analysis indicated that the use of a flowable composite produced significantly more (p = 0.04) gap-free resin-dentin interfaces than teeth restored without the flowable composite. However, both flowable composite and enamel etching could not prevent gap formation at enamel-resin interfaces and crack formation on enamel walls.

journal_name

Oper Dent

journal_title

Operative dentistry

authors

Belli S,Inokoshi S,Ozer F,Pereira PN,Ogata M,Tagami J

keywords:

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

70-5

issue

1

eissn

0361-7734

issn

1559-2863

journal_volume

26

pub_type

临床试验,杂志文章,随机对照试验
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