pp 1–9 | Cite as

Effect of self-etch adhesives on the internal adaptation of composite restoration: a CP-OCT Study

  • Turki A. Bakhsh
  • Nour H. Altouki
  • Lina S. Baeesa
  • Ruba A. Baamer
  • Reema M. Alshebany
  • Zuhair Natto
  • Adnan Nasir
  • Alaa Turkistani
  • Fatin Hasanain
  • Ghada H. Naguib
Original Article


Despite improvements in dental adhesive materials, internal adaptation remains a challenge in bonded restorations. The aim of this study was to compare microgaps and internal floor adaptation between two different self-etch adhesives in class-V cavities using cross-polarization optical coherence tomography (CP-OCT). In this in vitro study, standardized round class-V cavities were prepared in 20 non-carious human upper central incisor teeth. They were randomly divided into two groups, TN and SE, with each group receiving a different dental adhesive. In TN group, the adhesive used was all-in-one Tetric N-Bond Self-Etch (TN; Ivoclar/Vivadent, Liechtenstein), while SE group was bonded with two-step self-etch Clearfil SE Bond 2 adhesive (SE; Kuraray Noritake Dental Inc, Japan). The prepared cavities were restored with flowable composite and then stored in distilled water for 24 h. Next, they were immersed in silver nitrate, followed by immersion in a photo-developing solution. Optical comparison was carried out by CP-OCT to assess microgaps and composite adaptation at the cavity floor. A Mann–Whitney test was applied to the data, which showed a statistically significant difference in composite adaptation among the two groups (p < 0.001) with the SE group showing superior adaptation. CP-OCT is a reliable tool for non-invasive imaging that gives an insight into composite performance. Better adaptation was found with the two-step self-adhesive for the composite used in this study.


Imaging OCT Tooth Microgaps Adhesive 



This work was partially supported by the Academy of International Medical Center, Jeddah, Saudi Arabia and partly by Saudi Dental Research group (SDR). The authors therefore acknowledge with thanks the International Medical Center and SDR for technical support. We would also like to show our gratitude to Muhannad Shuman, Malek Eldesouky, Nadyah Althafir, Shahad Almaghamsi and Ather Aljarullah for their assistance in this research.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interests.


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Copyright information

© The Society of The Nippon Dental University 2018

Authors and Affiliations

  • Turki A. Bakhsh
    • 1
    • 2
  • Nour H. Altouki
    • 3
  • Lina S. Baeesa
    • 3
  • Ruba A. Baamer
    • 3
  • Reema M. Alshebany
    • 3
  • Zuhair Natto
    • 4
  • Adnan Nasir
    • 3
  • Alaa Turkistani
    • 1
  • Fatin Hasanain
    • 1
  • Ghada H. Naguib
    • 5
    • 6
  1. 1.Operative Dentistry Department, Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia
  2. 2.Dental DepartmentInternational Medical CenterJeddahSaudi Arabia
  3. 3.Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia
  4. 4.Department of Dental Public Health, Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia
  5. 5.Division of Biomaterials, Department of Operative Dentistry, Faculty of DentistryKing Abdulaziz UniversityJeddahSaudi Arabia
  6. 6.Department of Oral Biology, Faculty of DentistryCairo UniversityCairoEgypt

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