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[Raman spectroscopic analysis of post-cement-root canal dentin interface].
Zhen-Chun Li1, Xuan Wu, Xiao-Dong Chen
1Dept. of Prosthodontics, Dalian Stomatological Hospital, School and Hospital of Stomatology, Dalian University, Dalian 116021, China.
Summary
Resin cements show interaction with dentin and fiber posts, unlike zinc phosphate or glass ionomers. Laser-Raman spectroscopy effectively analyzed these dental material interfaces.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Spectroscopy
Background:
- Adhesion of luting cements to canal dentin is crucial for the longevity of endodontically treated teeth.
- Understanding the interface between cements, dentin, and posts is essential for improving restorative success.
Purpose of the Study:
- To investigate the interfacial adhesion characteristics between luting cements and canal dentin.
- To evaluate the dentin-cement-post interface using Laser-Raman spectroscopy.
Main Methods:
- Three luting cements (zinc phosphate, glass ionomer, resin) and two post types (titanium, fiber-glass) were tested.
- Extracted human anterior teeth underwent endodontic treatment.
- Laser-Raman spectroscopy analyzed cement, post, and dentin interfaces before and after cementation.
Main Results:
- No significant spectral changes were observed at the zinc phosphate/dentin and glass ionomer/dentin interfaces.
- Distinct Raman spectral changes indicated interactions at the resin/dentin and resin/fiber-glass post interfaces.
Conclusions:
- Laser-Raman microspectroscopy is a valuable tool for analyzing dentin-luting cement interfaces.
- Resin cements demonstrate potential chemical interactions with both dentin and fiber-glass posts.
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