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Hybrid layer seals the cementum/4-META/MMA-TBB resin interface
Saori Tanaka1, Tsutomu Sugaya, Masamitsu Kawanami
1Department of Periodontology and Endodontology, Graduate School of Dental Medicine, Hokkaido University, Kita 13 Nishi 7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan. tanaka@den.hokudai.ac.jp
Summary
This study shows that 4-META/MMA-TBB resin effectively bonds to cementum, forming a hybrid layer similar to dentin. This finding supports its potential use in dental treatments involving cementum adhesion.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Adhesive Dentistry
Background:
- 4-META/MMA-TBB resin is clinically used for bonding fractured roots and in apicoectomy.
- Previous research has not investigated the adhesion of this resin to cementum.
Purpose of the Study:
- To evaluate the bonding and sealing capabilities of 4-META/MMA-TBB resin on cementum.
- To compare cementum adhesion with established dentin adhesion properties.
Main Methods:
- Bovine root cementum and dentin surfaces were treated with citric acid and ferric chloride.
- 4-META/MMA-TBB resin was applied to treated surfaces.
- Microtensile bond strength and leakage tests were performed.
- Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) were used for interface analysis.
Main Results:
- The microtensile bond strength to cementum was comparable to that of dentin.
- Leakage levels for cementum were similar to those observed for dentin.
- A hybrid layer, 2-3 micrometers thick, was identified at the resin-cementum interface via SEM and TEM.
Conclusions:
- 4-META/MMA-TBB resin demonstrates effective adhesion to cementum.
- Adhesion to cementum occurs through the formation of a hybrid layer, mirroring its mechanism on dentin.
- The findings support the potential clinical application of 4-META/MMA-TBB resin for treatments involving cementum.
