瓷牙用賤金屬切應結合力之研究（VII）

The Shear Bond Strength of Porcelain and Base Metal Alloys for Metal-Ceramic Crown (VII)

許金泗(Chin-Szu Hsu) ； 吳映德(Ying-Te Wu)

《The Kaohsiung Journal of Medical Sciences》 13卷12期 (1997/12) Pp. 730-737

https://doi.org/10.6452/KJMS.199712.0730

摘要

The popularity of the base metal alloys has increased in the past decade because of their lower price, high tensile strength and high elastic modulus. Several factors are critical in ensuring successful bonding: the matching of the thermal coefficients of expansion and constraction of the porcelain and metal, the metallurgic composition of the alloy and the pretreatment procedures used in preparation of the metal substructure.
Two ceramic base alloys (one alloy contains beryllium, another without) were studied. The surface textures were created by 50μm, 100μm aluminum oxide sandblasting, carbide bur, carborundum point and disk upon two base alloys, Rexillium III and Wiron 88. The purposes of this investigation were to determine how these variations in surface texture affect the bond strength of the two ceramo-metal alloy systems. The following results were obtained:
1. Statistics revealed that bond strength was not significantly increased with surface roughness (p＞0.05).
2. The shear bond strength for variable pretreatment methods were in the following sequence:100μm Al2O3 sandblasting, carbide bur, 50μm Al2O3 sandblasting, carborundum point, disk.
3. The Rexillium III alloy had a significantly higher bond strength than Wiron 88 alloy (p ＜0.05).
4. The Noritake porcelain showed a significantly higher bond strength than Biobond porcelain (p ＜0.05).
5. The fracture site was cohesive and adhesive mode treated with 50μm Al2O3, 100μm Al2O3, carbide bur. But carborundum point and disk was adhesive mode.

並列摘要

The popularity of the base metal alloys has increased in the past decade because of their lower price, high tensile strength and high elastic modulus. Several factors are critical in ensuring successful bonding: the matching of the thermal coefficients of expansion and constraction of the porcelain and metal, the metallurgic composition of the alloy and the pretreatment procedures used in preparation of the metal substructure.
Two ceramic base alloys (one alloy contains beryllium, another without) were studied. The surface textures were created by 50μm, 100μm aluminum oxide sandblasting, carbide bur, carborundum point and disk upon two base alloys, Rexillium III and Wiron 88. The purposes of this investigation were to determine how these variations in surface texture affect the bond strength of the two ceramo-metal alloy systems. The following results were obtained:
1. Statistics revealed that bond strength was not significantly increased with surface roughness (p＞0.05).
2. The shear bond strength for variable pretreatment methods were in the following sequence:100μm Al2O3 sandblasting, carbide bur, 50μm Al2O3 sandblasting, carborundum point, disk.
3. The Rexillium III alloy had a significantly higher bond strength than Wiron 88 alloy (p ＜0.05).
4. The Noritake porcelain showed a significantly higher bond strength than Biobond porcelain (p ＜0.05).
5. The fracture site was cohesive and adhesive mode treated with 50μm Al2O3, 100μm Al2O3, carbide bur. But carborundum point and disk was adhesive mode.

並列關鍵字

base metal ； shear bond strength ； porcelain