다양한 방법으로 제작한 코발트-크롬 코어와 세라믹의 전단결합강도 비교
Shear bond strength of veneering porcelains to Co-Cr cores with various manufacturing methods
류태훈, 김정미, 조혜원, 정지혜, 김유리,
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류태훈 ( Ryu Tae-Hun ) - 원광대학교 치과대학 치과보철학교실
김정미 ( Kim Jeong-Mi ) - 원광대학교 치과병원 치과기공실
조혜원 ( Cho Hye-Won ) - 원광대학교 치과대학 치과보철학교실
정지혜 ( Jung Ji-Hye ) - 원광대학교 치과대학 치과보철학교실
김유리 ( Kim Yu-Lee ) - 원광대학교 치과대학 치과보철학교실
KMID : 1035320170440010001
Abstract
The purpose of this study was to compare the shear bond strength of veneering porcelains(Duceram Kiss, VITA VMK Master) to 3 types of Co-Cr cores manufactured with different methods(casting, milling, 3D printing). Cast(StarLoy C, Degudent, Germany), milled (Ceramill Sintron, Amann Girrbach, Germany), 3D printed(EOS Cobalt Chrome SP2; EOS GmbH, Germany) Co-Cr core specimens were fabricated according to Schmitz-Schulmeyer method. Two kinds of dental porcelains(Duceram Kiss, VITA VMK Master) were applied on Co-Cr cores, with each core given 12 specimens of each porcelain respectively, thus in total 72 specimens were fabricated. Shear bond strength of each specimen was measured by universal testing machine(Z020, Zwick, Ulm, Germany) and scanning electron microscope (JSM 6360, JEOL, Tokyo, Japan) was used for observing fracture pattern in 20 magnification. Shear bond strength according to different manufacturing methods were analyzed using SPSS 21.0(IBM SPSS Statistics 21, IBM, Chicago, USA) in one-way ANOVA. Duncan’s multiple range test were conducted as a post-test.(p=0.05)
Shear Bond strength of Duceram Kiss veneered groups were as follows: milled(29.78±4.67 MPa), cast(29.29±5.84 MPa), 3D printed (26.58±4.78 MPa). Results of VITA VMK Master veneered groups were as follows: milled (29.08 ±4.60 MPa), 3D printed(27.24±4.28 MPa), cast(26.23±2.92 MPa). Yet both groups had no significant difference (p>0.05). All specimens in the test groups exhibited combined failure of mixed cohesive and adhesive failure.
키워드
shear bond strength; Co-Cr core; casting; milling; 3D printing; failure mode
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