接着性レジンシステムと各種歯科用基材との接着強さ

Bond strength of an adhesive resin system with various dental substrates.

抄録

パナビア21レジン系接着システムをさまざまな歯科用基材間の接着剤として評価するための室内試験を行った．パナビア21レジンをエナメル質と象牙質に直接接着させ，ニッケル-クロム-ベリリウム（Ni-Cr-Be）試料とエナメル質，象牙質，他のNi-Cr-Be試料，III型金との間に配置した．アマルガムと象牙質の接着には、パナビア21レジンも使用した。せん断接着強さは、24時間後と3ヵ月後のサーモサイクル後に測定した。24時間および3ヵ月の試験結果から、パナビア21レジンのエナメル質接着強さ（24時間：19.3±5.5MPa、3ヵ月：23.7±4.4MPa）は、象牙質接着強さ（24時間：7.8±1.4MPa、3ヵ月：8.8±3.2MPa）を上回った。パナビア21レジンとNi-Cr-Be合金との接着強さ（24時間，16.3±3.4MPa；3ヵ月，17.6±2.7MPa）およびパナビア21レジンとNi-Cr-Be合金と象牙質との接着強さ（24時間，18.7±4.2MPa；3ヵ月，19.8±5.3MPa）は，接着性エナメル質接着強さに匹敵した．Ni-Cr-Be合金とタイプIII金との間のパナビア21レジンでも高い接着強さが得られた（24時間、39.3±5.9MPa；3ヵ月、35.5±7.1MPa）。パナビア21レジンで両試験期間中に観察された最大の接着強さは，Ni-Cr-Be合金とエナメル質の間（24時間，54.2±10.7 MPa；3ヵ月，56.4±7.1 MPa）とNi-Cr-Be合金の2つの試料の間（24時間，55.1±5.6 MPa；3ヵ月，49.1±8.6 MPa）であった．パナビア21レジンは、固定式補綴修復物の埋入に一般的に使用されるさまざまな歯科用基材間で高い接着強さを示した。

A laboratory study was conducted to evaluate the Panavia 21 resin-based adhesive system as a bonding agent between a variety of dental substrates. Panavia 21 resin was bonded directly to enamel and dentin and placed between nickel-chromium-beryllium (Ni-Cr-Be) specimens and enamel, dentin, other Ni-Cr-Be samples, and type III gold. Panavia 21 resin was also used to bond amalgam to dentin. Shear bond strengths were determined at 24 hours and after thermocycling at 3 months. The results of this study at both the 24-hour and the 3-months test periods indicate that the enamel bond strengths of Panavia 21 resin (24 hours, 19.3 +/- 5.5 MPa; 3 months, 23.7 +/- 4.4 MPa) exceeded its dentin bond strengths (24 hours, 7.8 +/- 1.4 MPa; 3 months, 8.8 +/- 3.2 MPa). The bond strengths between Panavia 21 resin and Ni-Cr-Be alloy (24 hours, 16.3 +/- 3.4 MPa; 3 months, 17.6 +/- 2.7 MPa) and those for Panavia 21 resin between Ni-Cr-Be alloy and dentin (24 hours, 18.7 +/- 4.2 MPa; 3 months, 19.8 +/- 5.3 MPa) were comparable to adhesive enamel bond strengths. High bond strengths were also generated by Panavia 21 resin between Ni-Cr-Be alloy and type III gold (24 hours, 39.3 +/- 5.9 MPa; 3 months, 35.5 +/- 7.1 MPa). The greatest bond strengths observed during both test time periods for Panavia 21 resin were between Ni-Cr-Be alloy and enamel (24 hours, 54.2 +/- 10.7 MPa; 3 months, 56.4 +/- 7.1 MPa) and between two samples of Ni-Cr-Be alloy (24 hours, 55.1 +/- 5.6 MPa; 3 months, 49.1 +/- 8.6 MPa). Panavia 21 resin produced high bond strengths between a variety of dental substrates commonly used for the placement of fixed prosthodontic restorations.