[논문]비니어 세라믹과 지르코니아 세라믹의 Push-Shear 결합강도

안재석; 노형록; 이정환

doi:10.5392/jkca.2015.15.09.384

비니어 세라믹과 지르코니아 세라믹의 Push-Shear 결합강도
Push-Shear Bond Strength of Veneering Ceramics and Zirconia Ceramic 원문보기

한국콘텐츠학회논문지 = The Journal of the Korea Contents Association, v.15 no.9, 2015년, pp.384 - 394

안재석 (광주보건대학교 치기공과) , 노형록 (전북대학교 치의과학과) , 이정환 (광주보건대학교 치기공과)

초록
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본 연구에서는 원통형 지르코니아 코어에 다섯 종류의 지르코니아 비니어 세라믹을 축성하여 push-전단결합강도를 측정하고, 비니어 세라믹의 이축굽힘강도와 지르코니아 글라스 라이너 처리에 따른 전단결합강도 차이를 알아보고자 하였다. 지르코니아 비니어 세라믹은 piston-on-three-ball test로 이축굽힘강도를 측정하였고, 지르코니아 실린더 코어와 비니어 세라믹은 push-shear test로 결합강도를 측정하였으며, 결과값은 이원분산분석을 사용하여 분석하였다. 이축굽힘강도는 Cercon ceram kiss (CE)군에서 가장 높게 측정되었고 전단결합강도는 글라스 처리군과 Triceram(TR)군이 높게 측정 되었으며 Creation ZI(CR)군에서 가장 낮은 값이 측정 되었다. 실험군에서 지르코니아 라이너 처리군이 라이너 처리하지 않는 군보다 전단결합강도가 높게 나타났으며 통계적으로 유의한 차이를 보였다(P<0.05). 따라서 지르코니아 라이너 처리는 지르코니아와 비니어 세라믹의 결합강도를 향상시킬 수 있는 것으로 사료된다.

Abstract ▼ AI-Helper

The purpose of this study was to evaluate the push-shear bond strength between five commercial zirconia veneering ceramics and zirconia core cylinder, and to investigate the effect of biaxial flexural strength and zirconia liner glass treatments. The biaxial flexural strengths of the veneering ceramics were evaluated by a piston-on-three-ball test. The bond strengths between the Y-TZP cylinder and zirconia veneering ceramics were evaluated using the push-shear bond strength test. The data was analyzed using two-way ANOVA and Scheffe's test. The biaxial flexural strength of Cercon ceram kiss (CE) was higher than those of the other groups. The glass-treated and Triceram zirconia groups showed the highest value and the Creation ZI(CR) showed the lowest. In all groups, the liner glass treatment groups showed significantly higher push-shear bond strength than those without(P<0.05). The liner glass treatments of zirconia can improve the bond strength between the zirconia ceramic core and veneering ceramics.

주제어

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제안 방법

As the limitations of this study the authors admit that the push-shear bond strength test specimens investigated do not represent clinical shape and oral conditions, but provide a geometry that permits shear bond strength measurement. Therefore, further studies, in the development of a zirconia core and veneering ceramic interface will be necessary for clinical long term success.
At first, this study examined the extent to which the biaxial flexural strengths of five commercially available zirconia veneering ceramics affect the bond strength between the zirconia core cylinder and commercially available veneering ceramics. The Weibull analysis used in the present study showed that the m values ranged from 5.
Each zirconia veneering ceramic powder was mixed with the corresponding manufacturer`s liquid(n=14 per group). Seventy disc specimens (diameter: 17 mm; thickness: 1.5 mm) were prepared using a vibration-condensation method with a stainless steel mold, and sintered in ceramic furnace(P-500, Ivoclar vivadent AG, Liechtenstein) according to the firing schedules recommended by the manufacturer[Table 2]. After self-glazing, all zirconia veneering ceramic specimens were wet ground with SiC paper up to 2000 grit and polished with 1 ㎛ ceramographic cloth and diamond suspensions.
The aims of this study, which is divided in two parts, were to compare the fracture strength of five commercially available zirconia veneering ceramics by a piston-on-three-ball biaxial flexural test method using circular disc specimens to determine if they can affect the bond strength, and to estimate the effect of surface treatments with and without the application of two types of liner glass treatment, a specially-prepared glass and zirconia liner products, between the zirconia core cylinder and five veneering ceramics using Push-shear bond test[13][14].
The fractured surfaces were observed by scanning electron microscopy(JEOL, JSM-5800, Japan) and optical microscopyLeica, EZ4D, Germany). These analyses were used to examine the mechanisms of failure as well as the nature of the interface between the treated surface and veneering porcelain.

대상 데이터

Zirconia core cylinder specimens were obtained from experimental industrially manufactured yttria partially-stabilized tetragonal zirconia polycrystalline (Y-TZP sleeve, NSC, Gwangju, Korea) ceramic cylinder (diameter: 3.6 mm; length: 18 mm). The zirconia ceramic cylinders were cleaned, dried and sintered at 1450℃ for 2 h at a heating and cooling rate of 8.

데이터처리

The push-shear bond strength means from each group from were analyzed by two-way ANOVA for the effect of surface treatment and liner glass. A post hoc Scheffe’s test was used(p=0.

성능/효과

In the push-shear bond strength test, three catastrophic failure modes were observed: adhesive, cohesive and mixed failure mode. The most promising results showed that the zirconia liner groups had higher mean push-shear bond strength. The failure mode observed for Triceram(TR) and with the zirconia liner groups were mainly mixed mode; adhesive at the interface and cohesive in the veneering ceramic[Fig.

후속연구

These results suggest that liner glass treatment should be performed on zirconia all-ceramic system to improve the bond strength. Further study will be needed to overcome the existing thermal incompatibilities between the zirconia core and veneering ceramics.
As the limitations of this study the authors admit that the push-shear bond strength test specimens investigated do not represent clinical shape and oral conditions, but provide a geometry that permits shear bond strength measurement. Therefore, further studies, in the development of a zirconia core and veneering ceramic interface will be necessary for clinical long term success.

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