Cavity adaptation of composite restorations prepared at crown and root: Optical assessment using SS-OCT

Rima Zakzuk Alshahni, Yasushi Shimada, Yuan Zhou, Masahiro Yoshiyama, Alireza Sadr, Yasunori Sumi, Junji Tagami

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Evaluation of gap formation at the interfaces of a two-step self-etching adhesive with/without pre-etching was performed using swept-source optical coherence tomography (SS-OCT). Round cavities were prepared in bovine incisors at the middle (MC) and cervical (CC) thirds of the crown and the cervical third of the root (CR). Clearfil SE bond was directly applied to one group (SE) and another (PA) was pretreated with K-etchant gel. Following restoration by flowable composite resin, the teeth were thermally challenged and stored for 2 months. Interfacial gaps observed in the cross-sectional OCT images were analyzed and the bottom cavities exhibited increased gaps compared to the margin and dentin-enamel junction (DEJ). The CR site had a larger gap than at MC and CC in the SE group. DEJ separation at the MC was significantly smaller than that at CC in both groups. Therefore, gap formation depends on the cavity region, location, and bonding protocol.

Original languageEnglish
Pages (from-to)779-789
Number of pages11
JournalDental materials journal
Volume38
Issue number5
DOIs
Publication statusPublished - 2019

Keywords

  • Bottom
  • Dentin-enamel junction
  • Gap
  • SS-OCT
  • Self-etch adhesive

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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