3Dプリンターで作製した仮設橋梁材料のせん断接着強度をレジンセメントの種類と表面処理の違いで比較した

Comparison of the shear bond strength of 3D printed temporary bridges materials, on different types of resin cements and surface treatment.

抄録

背景:

本研究の目的は，3Dプリンターで作製した歯冠用仮歯材料について，レジンセメントとレジン添加型グラスアイオノマーセメントのせん断接着強さを，異なる表面処理方法と組み合わせて比較することにある．

BACKGROUND: Thus, purpose of this study was to compare the shear bond strength of the resin cement and the resin modified glass ionomer cement on 3D printed temporary material for crowns and bridges in combination with different surface treatment modalities.

材料および方法:

VarseoSmile Temp material (Bego, Bremen, Germany) (n=64) を長方形のブロック状 (n=32) と円柱状の試験片 (n=32) をVarseo S 3D printer (Bego, Bremen, Germany) を用いて印刷した．試験片は4つのグループに分け、各種類8個ずつとした。2グループ（n=16組）はPerlablast® Micro [PM] 50µm（Bego, Bremen, Germany）で，2グループ（n=16組）はAlumina [AL] 50µmでブラスト処理を施した．円柱状の試験片をZwick/Roell社（Ulm, Germany）の機械で荷重20Nで直方体ブロックにセメント固定し，同等のセメント固定を行った．前処理として，1群（n=8）にフジセム2［フジ+AL & フジ+PM］を，1群にバリオリンク®エステティック［バリオ+AL & バリオ+PM］をそれぞれ用いてセメントを充填した．フジセム2は化学的に硬化させ、デュアルキュアのバリオリンク®エステティックはLED（Bluephase II, Ivoclar Vivadent, Ellwagen, Germany；光強度1,000 mW/cm2以上、ハイパワーモジュール）で追加光硬化を行った。せん断強度は，Zwick/Roell万能試験機（速度0.8mm/min）で行い，破砕および統計解析を行った（T-test，<0.05）．

MATERIAL AND METHODS: Test specimens VarseoSmile Temp material (Bego, Bremen, Germany) (n=64) in the form of rectangular blocks (n=32) and cylindrical test specimens (n=32) were printed using the Varseo S 3D printer (Bego, Bremen, Germany). The specimens were divided into 4 groups, with 8 specimens of each kind. Two groups (n=16 pairs) were blasted with Perlablast® Micro [PM] 50µm (Bego, Bremen, Germany) and two groups (n=16 pairs) were blasted with alumina [AL] 50µm. The cylindric specimen were cemented on the rectangular block with a load of 20N using a Zwick/Roell machine (Ulm, Germany), to ensure a comparable cementing process. One group (n=8) of each pre-treatment was cemented with Fuji Cem 2 [Fuji+AL & Fuji+PM] and one of each with Variolink® Esthetic [Vario+AL & Vario+PM]. The Fuji Cem 2 was chemically cured while dual curing Variolink® Esthetic was additionally light cured using LED (Bluephase II, Ivoclar Vivadent, Ellwagen, Germany; light intensity, >1,000 mW/cm2, high power modus). The shear strength was performed with Zwick/Roell universal test machine (speed, 0.8 mm/min), fracture and statistical analysis was performed (T-test, <0.05).

結果:

RESULTS: T-test showed a significant difference Fuji Cem 2 (Fuji+AL & Fuji&PM) and Variolink® Esthetic (Vario+AL &Vario+PM) (=0.000). Fuji+AL & Fuji+PM showed a significant difference for surface pre-treatment (=0.002). Vario+AL & Vario+PM no significance (=0.872) for pre-treatment method was detectable.

結論:

バリオリンク®エステティックは，フジセム2に比較して高い接着強さを示し，フジセム2はアルミナ前処理により接着強さが増加した．バリオ＋ALおよびバリオ＋PMでは有意差は認められなかった．せん断接着強さ，接着，接着性レジンセメント，レジン添加型グラスアイオノマーセメント，3Dプリント材料，力学試験，プロビジョナルレストレーション．

CONCLUSIONS: Variolink® Esthetic showed a higher bond strength compared to Fuji Cem 2 and an increasing bond strength for Fuji Cem 2 with alumina pre-treatment. There was no significant difference for Vario+AL and Vario+PM. Shear bond strength, adhesion, adhesive resin cement, resin modified glass ionomer cement, 3D printable materials, mechanical testing, provisional restoration.