Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지)

Korean Academy of Stomatognathic Function and Occlusion (대한턱관절교합학회)
권호 표지

Shear Bond Strength of Composite Resin ($TESCERA^{TM}$ ATL) Veneering on Zirconia Surface with Various Surface Treatments

지르코니아의 표면처리 방법에 따른 압축강화형 복합레진 ($TESCERA^{TM}$ ATL)전장의 결합강도

  • Park, Soo-Jeong (Department of Biomaterials & Prosthodontics, Graduate School of Dentistry, Kyung Hee University) ;
  • Lee, Richard Sung-Bok (Department of Biomaterials & Prosthodontics, Graduate School of Dentistry, Kyung Hee University) ;
  • Lee, Suk-Won (Department of Biomaterials & Prosthodontics, Graduate School of Dentistry, Kyung Hee University) ;
  • Ahn, Su-Jin (Department of Biomaterials & Prosthodontics, Graduate School of Dentistry, Kyung Hee University) ;
  • Lim, Ho-Nam (Department of Dental Materials, Graduate School of Dentistry, Kyung Hee University)
  • 박수정 (경희대학교 치과대학.치의학전문대학원 치과보철학교실) ;
  • 이성복 (경희대학교 치과대학.치의학전문대학원 치과보철학교실) ;
  • 이석원 (경희대학교 치과대학.치의학전문대학원 치과보철학교실) ;
  • 안수진 (경희대학교 치과대학.치의학전문대학원 치과보철학교실) ;
  • 임호남 (경희대학교 치과대학.치의학전문대학원 치과재료학교실)
  • Received : 2010.12.10
  • Accepted : 2011.03.25
  • Published : 2011.03.30
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Abstract

The aim of this study was to evaluate shear bond strength of pressed reinforced composite resin ($TESCERA^{TM}$ ATL) veneering to zirconia with various surface treatments. Forty sintered zirconia specimens and forty pockmarked zirconia specimens were fabricated. All the materials were categorized as Group 1 (Control : porcelain veneering on zirconia surface), Group 2 ( $TESCERA^{TM}$ ATL dentine veneering after bonding agent application on zirconia surface), Group 3 ($TESCERA^{TM}$ ATL dentine veneering on pockmarked zirconia surface), Group 4 ($TESCERA^{TM}$ ATL dentine veneering after bonding agent application on pockmarked zirconia surface), Group 5 (Thermocycling on Group 1), Group 6 (Thermocycling on Group 2), Group 7 (Thermocycling on Group 3), and Group 8 (Thermocycling on Group 4). SBS(Shear bond strength) of 8 groups was determined with an Instron Universal Testing Machine. Also fractured surface of specimens were observed with a scanning electron microscope. There were no significant differences in the initial SBS between Group 1(control group), Group 3, and Group 4. (p>0.05) Group 2 presented the lowest SBS values. There was a no significant difference between just as 24hour water storage and simulated aging on pockmarked zirconia groups. (p>0.05) A formation of pockmarked irregularities on zirconia surface as mechanically pitted surface was reliable method for establishing a stronger bond between $TESCERA^{TM}$ ATL and zirconia-based material.

압축강화형 복합레진($TESCERA^{TM}$ ATL)을 지르코니아 framework에 효과적으로 전장하기 위하여, 표면처리 방법을 여러 가지로 달리한 지르코니아 표면에 압축강화형 복합레진을 전장하여 전단결합강도를 실험적으로 비교하였다. 지르코니아의 표면적 증가를 도모하기 위해 최종소결 전 지름 1.1mm round bur를 사용하여 지르코니아 표면에 pockmark (honey-comb concept)를 형성하였고, 화학적으로는 Primer (Zr-plus primer, Bisco, Inc., Shaumurg, USA)를 도포하여 결합강도 증가를 도모하였다. 지르코니아에 porcelain을 적층하여 대조군으로 삼고 각 군을 5도와 55도 사이에서 10,000회 thermocycling시켜 simulated aging 결과 또한 비교하였다. 전단결합강도를 측정하였고 주사전자현미경을 통해 파절단면을 관찰하였다. Pockmark를 형성한 실험군에 압축강화형 복합레진($TESCERA^{TM}$ ATL) 전장 시 도재 전장과 유사한 전단결합 강도를 발휘하였으며,(p>0.05) 동일 시편을 24시간 수중 보관했을 때에 비해 thermocycling 했을 때의 전단결합강도가 약간 감소하였으나 유의차는 보이지 않았다.(p>0.05) 지르코니아 표면에의 Primer의 도포가 압축강화형 복합레진 ($TESCERA^{TM}$ ATL)과의 결합강도를 증가시키지는 못하였다. 지르코니아 소결 전 표면에 pockmark를 주어 표면적을 증가시키고 요철의 효과를 주는 것은 $TESCERA^{TM}$ ATL과의 결합강도를 증가시켰으며, 이는 임상적으로 지르코니아-포세린의 결합강도에 필적하는 강하고 내구성 있는 결합강도를 가져온다고 판단되었다.

Keywords

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