Non-destructive 3D imaging of composite restorations using optical coherence tomography: Marginal adaptation of self-etch adhesives

Patricia Makishi, Yasushi Shimada, Alireza Sadr, Junji Tagami, Yasunori Sumi

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Objectives: To investigate the potential use of swept-source optical coherence tomography (SS-OCT) as a new tool to evaluate marginal adaptation of composite restorations in class I cavities. Methods: Round-shaped class I cavities (3 mm diameter × 1.5 mm depth) were prepared on buccal enamel of bovine teeth with cavity floor located in dentine. The cavities were restored with a flowable resin composite (Clearfil Majesty LV) using two-step self-etch adhesive (SE Bond), all-in-one self-etch adhesive (G-Bond) or no adhesive (Control). The specimens were subjected to water storage (37 °C, 24 h) or thermal stress challenge (5000 cycles, 5 °C and 55 °C). 3D scans (4 mm × 4 mm × 2.6 mm obtained in 4 s) of the restoration were obtained using SS-OCT before and after immersion into a contrast agent. 2D images obtained from the 3D scans (n = 30/group) were analysed to evaluate marginal adaptation. Area fraction of pixels with high brightness values at the interfacial zone was calculated using a digital image analysis software. The results were statistically compared with statistical significance defined as p ≤ 0.05. Results: Wilcoxon signed ranks test showed that there was no statistically significant difference in the results of SS-OCT before and after infiltration of the contrast agent when a ranking transformation was applied on to the data (p > 0.05). A significant positive linear correlation was found between the two SS-OCT images. Confocal laser scanning photomicrographs of samples cut after silver infiltration confirmed the presence of gap. Conclusions: 3D imaging by SS-OCT can be considered as a non-invasive technique for fast detection of gaps at the restoration interface.

Original languageEnglish
Pages (from-to)316-325
Number of pages10
JournalJournal of Dentistry
Volume39
Issue number4
DOIs
Publication statusPublished - Apr 2011
Externally publishedYes

Fingerprint

Optical Coherence Tomography
Adhesives
Contrast Media
Cheek
Immersion
Dentin
Dental Enamel
Nonparametric Statistics
Silver
Tooth
Lasers
Software
Hot Temperature
Water

Keywords

  • 3D imaging
  • Marginal adaptation
  • Self-etch adhesive
  • SS-OCT

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Non-destructive 3D imaging of composite restorations using optical coherence tomography : Marginal adaptation of self-etch adhesives. / Makishi, Patricia; Shimada, Yasushi; Sadr, Alireza; Tagami, Junji; Sumi, Yasunori.

In: Journal of Dentistry, Vol. 39, No. 4, 04.2011, p. 316-325.

Research output: Contribution to journalArticle

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