複数の水素結合部分を持つ粘着性モノマーを介して,デンチン結合の改善
Denghao Fu1, Jonathan Hardy2, Caroline R Szczepanski1
1Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI 48824, USA.
Acta biomaterialia
|September 4, 2025
まとめ
2-ウレイド-4[1H]-ピリミディノン (UPy) モノマーを歯用接着剤に組み込むことは,結合強さと耐久性を高めます. UPy-機能化されたメタクリラミドは,ポリメリゼーションと生物互換性を改善し,UPy-OPG230-MMAは水中の状態で最適な性能を示す.
科学分野:
- バイオマテリアル科学
- ポリマー化学
- 歯科用 材料
背景:
- 樹脂とデントンのインターフェースは 歯の修復における重要な弱点であり, 劣化傾向にあります.
- 現在の結合技術は,コラーゲンの分解とメタクリlateの水解により,長期の耐久性に問題があります.
- 接点と粘着樹脂内の水素結合を強化することは有望な戦略です.
研究 の 目的:
- UPy機能化されたメタクリラミドを合成し,歯の粘着性能を改善するために評価する.
- 水素結合と粘着性に対するグリコールスペーサーの柔軟性の影響を調査する.
- ポリメリゼーション運動,生物相容性,機械的強度,および歯質への結合に対するUPyモノメアの影響を評価する.
主な方法:
- 3つのUPyベースのメタクリラミドの合成,さまざまなグリコールスペーサー (UPy-OPG400-MMA,UPy-OPG230-MMA,UPy-OEG148-MMA)
- モデルメタクリlateベースの粘着剤の配合にUPyモノマーを組み込む.
- ポリメリゼーション運動,生物相容性,機械特性,およびマイクロ張力結合強度 (μTBS) の評価.
- SEMやラーマンスペクトロスコーピーのようなテクニックを用いたインターフェイスの特徴付け.
主要な成果:
- UPy-メタクリラミドは,ポリメリゼーション運動,生物適合性,および機械的特性を強化しました.
- グリコールスペーサーの柔軟性は,水素結合の有効性と全体的な性能に大きな影響を与えた.
- UPy-OPG230-MMAを持つ樹脂は水中の条件で最も堅固な水素結合を示した.
- セルフエッチング粘着剤のモデルで,HEMAの50%をUPy-OPG230-MMAに置き換えることで,μTBSとインターフェイスの整合性が著しく改善されました.
結論:
- UPy機能化されたメタクリラミッドは,歯の接着剤と樹脂-デントンのインターフェースを強化する有効な戦略を提供します.
- UPy-OPG230-MMAモノメアは,水性環境での最適な水素結合により優れた性能を示しています.
- このアプローチは,粘着剤の耐久性と生物互換性を高め,以前のUPyアプリケーションの限界に対処します.
- 開発されたUPyモノメアは水溶剤に溶けやすいので,歯科用にも適しています.
関連する概念動画
Hydrogen Bonds
10.2K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
10.2K
Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)
2.0K
Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
2.0K
Complexometric Titration: Ligands
1.1K
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
1.1K
Cationic Chain-Growth Polymerization: Mechanism
2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K
Anionic Chain-Growth Polymerization: Overview
2.2K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.2K
Complexation Equilibria: The Chelate Effect
649
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
649


