CAD/CAM仮修復物のせん断接着強さに及ぼす表面処理と修復材料の影響．

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J Adv Prosthodont.2019 Apr;11(2):95-104. doi: 10.4047/jap.2019.11.2.95.Epub 2019-04-26.

CAD/CAM仮修復物のせん断接着強さに及ぼす表面処理と修復材料の影響．

Influence of surface treatments and repair materials on the shear bond strength of CAD/CAM provisional restorations.

Ki-Won Jeong
Sung-Hun Kim

PMID: 31080570 PMCID: PMC6491361. DOI: 10.4047/jap.2019.11.2.95.

抄録

目的:

表面処理や補修材がせん断接着強さに及ぼす影響を評価し、CAD/CAM仮修復材の破壊靭性を測定する。

PURPOSE: To evaluate the effect of surface treatments and repair materials on the shear bond strength and to measure the fracture toughness of CAD/CAM provisional restoration materials.

材料と方法:

MATERIALS AND METHODS: Four CAD/CAM (3D printing: Nextdent C&B and ZMD-1000B Temporary, CAD/CAM resin block: Yamahachi PMMA disk and Huge PMMA block) and four conventional (monometacrylate: Jet and Alike, dimetacrylate: Luxatemp and Protemp 4) materials were selected to fabricate disk-shaped specimens and divided into six groups according to surface treatment (n=10). CAD/CAM materials were repaired with Jet or Luxatemp, while conventional materials were repaired with their own materials. The shear bond strength was measured by using universal testing machine. Ten rectangular column-shaped specimens for each material were fabricated to measure the fracture toughness by single edge v notched beam technique. Statistical analysis was performed by one-way ANOVA.

結果:

RESULTS: The highest shear bond strength of CAD/CAM materials was achieved by SiC paper + sandblasting. It was also accomplished when repairing 3D printing materials with Luxatemp, and repairing CAD/CAM resin blocks with Jet. Yamahachi PMMA disk showed the highest fracture toughness. Nextdent C&B showed the lowest fracture toughness value but no statistically significant difference from Alike and Luxatemp (>.05).

結論:

CAD/CAMプロビジョナル修復を成功させるためには、CAD/CAM材料の種類に応じた機械的表面処理と適切な修復材料を選択する必要があります。CAD/CAMプロビジョナル材料は、従来の材料と比較して、臨床で使用するのに適した機械的特性を有しています。

CONCLUSION: In order to successfully repair the CAD/CAM provisional restoration, mechanical surface treatment and appropriate repair material according to the CAD/CAM material type should be selected. The CAD/CAM provisional materials have proper mechanical properties for clinical use as compared to conventional materials.