Document Type : Original Article
Authors
1
Department of Operative Dentistry, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt.
2
Department of Dental Biomaterials, Faculty of Dental Medicine (Assuit), Al-Azhar University, Assuit, Egypt
3
Department of Crown and bridge, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt.
4
Department of Endodontic, Faculty of Dental Medicine (Cairo-Boys), Al-Azhar University, Cairo, Egypt
5
Department of Operative Dentistry, Faculty of Dentistry, Nahada University, Beni-suief, Egypt.
Abstract
Aim: The goal of this study was to assess the nanoleakage of nano-filled resin
composites utilizing various adhesive systems at varying dentin depths. Subjects and
methods: In this investigation, 120 freshly removed human molars were tested. The
chosen teeth were randomly divided into two main groups (n=60), with each main
group being divided into two smaller groups (n=30) based on the adhesive system (etch-
&rinse mode and self-etch mode of application). According to the superficial and deep < /div>
dentin layers used in the adhesion process, each small group was separated into two
even smaller subgroups (n = 15). Each smaller group was divided into three different
categories depending on the lengths of storage (24 hours, 3 months, and 6 months) (n
= 5). Each tooth was gradually reconstructed using the nanofilled resin composite. The
specimens were cut longitudinally in the mesio-distal and bucco-lingual orientations
to create resin-dentin beams. For the purpose of assessing nanoleakage, the beam was
submerged in silver nitrate. Results: There was no statistically significant difference
between groups in terms of the effect of application mode or dentin depth on nanoleakage,
however there was a statistically significant increase in median nano-leakage scores
from 24 hours to 3 months and 3 to 6 months of storage duration. Conclusion: The use
of both bonding chemicals helps to reduce resin composite leakage. Since the self-etch
adhesive system excelled total etch in deep cavities, it is advised to use it. While the
total etch adhesive method, is advised for use in superficial cavities.
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