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

• Published in: Odontology 2019-04, Vol.107 (2), p.165-173
• Main Authors: Bakhsh, Turki A., Altouki, Nour H., Baeesa, Lina S., Baamer, Ruba A., Alshebany, Reema M., Natto, Zuhair, Nasir, Adnan, Turkistani, Alaa, Hasanain, Fatin, Naguib, Ghada H.
• Format: Article
• Language: English
• Subjects: Adhesives; Dental caries; Dental restorative materials; Dentistry; Medicine; Oral and Maxillofacial Surgery; Original Article; Self; Silver nitrate; Statistical analysis; Teeth
• ISSN: 1618-1247; 1618-1255
• DOI: 10.1007/s10266-018-0381-2

[Abstract] 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