メチルメタクリレート系レジンセメントの歯科修復材への接着強さに関するデータ

Data on bond strength of methyl methacrylate-based resin cement to dental restorative materials.

抄録

メタクリル酸メチル（MMA）系レジンセメントは，歯科治療において歯科修復材を接着するための一般的な溶着剤の1つである．MMA系レジンセメントと各補綴物の接着強度は，クラウンやポストなどの補綴物の剥離や破折のない補綴治療の臨床的成功に重要である．しかし，MMA系レジンセメントと適切なプライマーを併用した場合の接着特性に関するオープンデータは限られている．本稿では，4-META/MMA-TBBレジンセメント（MMA系レジンセメント）と修復物（銀合金，金合金，長石質ポーセレン，ジルコニア）の接着強度と破壊様式について，4種類のプライマーを用いてデータを示す．各修復材に接着性プライマーを塗布し、MMA系レジンセメントで接着させた。セメント接着した試料は，5℃と55℃の水槽に交互に浸漬するサーモサイクルを10,000サイクル行った．レジンセメントと各修復材との接着強さは，通常の引張接着強さ試験により測定した．また，検査した試料の破壊モードを観察し，判定した．測定された引張接着強さは，一元配置分散分析（ANOVA）およびTukeyの多重比較試験により統計的に分析された．

A methyl methacrylate (MMA) -based resin cement is one of the popular luting agents to bond a dental restorative material in dental treatments. Bond strength of the MMA-based resin cement with adhesive primer to each restorative material is important for clinical success in prosthodontic treatments without debonding or fracture failures of the restoration such as a dental crown and post. However, open data on the bonding properties of combined use of the MMA-based resin cement and appropriate primers is limited. This article provides data on the bond strength and fracture mode of the 4-META/MMA-TBB resin cement (MMA-based resin cement) to the restorative materials (silver alloy, gold alloy, feldspathic porcelain, and zirconia) with four types of primer. Each restorative material was applied with the adhesive primer and bonded with the MMA-based resin cement. The cement-bonded samples were subjected to a thermocycling in which the materials were immersed alternately in water baths at 5 °C and 55 °C for 10,000 cycles. The bond strength between the resin cement and each restorative material was measured by means of a conventional tensile bond strength test. The fracture modes of the examined samples were observed and determined. The measured tensile bond strengths were statistically analysed using one-way analysis of variance (ANOVA), followed by Tukey's multiple comparison test.