エッチアンドリンス法およびセルフエッチ法を用いた天然むし歯に対する普遍的接着剤システムの接着性能

Bonding Performance of Universal Adhesive Systems Applied in Etch-and-Rinse and Self-Etch Strategies on Natural Dentin Caries.

• V Hass
• Afm Cardenas
• Fsf Siqueira
• R R Pacheco
• Pmw Zago
• D O Silva
• M C Bandeca
• A D Loguercio

抄録

目的:

この研究では、天然象牙質齲蝕に対するエッチングアンドリンス（ER）またはセルフエッチング（SE）戦略を用いて適用された3つの汎用接着システムの接着性能を調査しました。

OBJECTIVE: This study investigated the bonding performance of three universal adhesive systems applied using etch-and-rinse (ER) or self-etch (SE) strategies on natural dentin caries.

材料と方法:

MATERIALS AND METHODS: Sixty human third molars were selected for this study: 30 naturally carious (CAD) and 30 sound (SD) teeth. The dentin surfaces were exposed, and teeth were randomly assigned to each evaluated adhesive system: Scotchbond Universal (SBU), Futurabond U (FBU), and Prime&Bond Elect (PBE) and an adhesive strategy: ER or SE. The adhesive systems were applied following the manufacturer's instructions, and the teeth were restored using a resin composite (Filtek Supreme Ultra, 3M). After 24 hours (distilled water at 37°C), samples were sectioned and evaluated using microtensile bond strength analysis (μTBS), micro-Raman spectroscopy to evaluate the degree of conversion within the hybrid layer (DC), and scanning electronic microscopy (SEM) to describe the morphology of the hybrid layer. The μTBS and DC data were analyzed using three-way analysis of variance and Tukey's test for means comparison (α=0.05). The SEM images were analyzed qualitatively.

結果:

CADとSDを比較すると、接着システムや戦略に関わらず、μTBS値の低下が観察された（<0.0001）。SBUは、象牙質基質とストラテジーの両方において統計的に高いμTBSを示した（<0.0001）。さらに、SBUはFBUおよびPBEと比較して、ハイブリッド層の完全性およびレジンタグの形成が優れていることを示した。FBUの平均μTBS値は、SEモードではSDの方が高かったのに対し、ERモードではCADの方がPBEと比較して高い平均μTBS値が観察された（<0.001）。

RESULTS: Reduced μTBS values were observed when comparing CAD with SD, regardless of adhesive system or strategy (<0.0001). SBU showed statistically higher μTBS for both dentin substrates and strategies (<0.0001). Furthermore, SBU showed greater integrity of the hybrid layer and resin tag formation compared with FBU and PBE. Mean μTBS values for FBU were higher for SD in the SE mode, whereas higher mean μTBS values were observed for CAD in the ER mode, both compared with PBE (<0.001).

結論:

齲蝕の影響を受けた基材では接着性能が低下する。ER戦略では、ユニバーサル接着システムの天然CAD上での接着性能を改善することはできませんでした。スコッチボンドユニバーサルシステムを使用した場合、接着性能の改善が得られた。

CONCLUSION: Bonding performance is reduced on a caries-affected substrate. The ER strategy was not able to improve the bonding performance on natural CAD for universal adhesive systems. Improved bonding performance was obtained when using the Scotchbond Universal system.