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논문 상세정보

IPS Empress 도재관의 파절강도: 하악 제1대구치에서 교합면 두께와 축면경사도에 따른 영향

FRACTURE STRENGTH OF THE IPS EMPRESS CROWN : THE EFFECT OF OCCLUSAL DEPTH AND AXIAL INCLINATION ON LOWER FIRST MOLAR

Abstract

The purpose of this study was to compare the fracture strength of the IPS Empress ceramic crown according to the occlusal depth (1.5mm, 2.0mm, 2.5mm) and axial inclination ($4^{\circ},\;8^{\circ},\;12^{\circ}$) of the lower First Molar. After 10 metal dies were made for each group, the IPS Empress ceramic crowns were fabricated and cemented with resin cement(Bistite resin cement, Tokuyama Soda Co. LTD., Japan). The cemented crowns were mounted on the testing jig with inclination of 30 degrees and the universal testing machine(Zwick Z020, Zwick, Germany)was used to measure the fracture strength. The results of this study were as follows : 1. The fracture strength of the ceramic crown with 2.5mm depth and $12^{\circ}$ inclination was the highest (1789 N). Crowns of 1.5mm depth and $4^{\circ}$ inclination had the lowest strength (1091 N). 2. There were no significant differences in the fracture strength by axial inclination of the same occlusal depth group. 3. Most fracture lines began at the loading area and extended through proximal surface perpendicular to the margin, irrespective of occlusal depth. Size of fragment was affected by the amount of occlusal reduction.

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이 논문을 인용한 문헌 (4)

  1. Jeong Hee-Chan 2006. "FRACTURE STRENGTH OF ZIRCONIA MONOLITHIC CROWNS" 대한치과보철학회지 = The journal of Korean academy of prosthodontics, 44(2): 157~164 
  2. Lee, Sang-Min ; Jeong, Hee-Chan ; Jeon, Young-Chan 2007. "FRACTURE STRENGTH OF ZIRCONIA MONOLITHIC CROWNS AND METAL-CERAMIC CROWNS AFTER CYCLIC LOADING AND THERMOCYCLING" 대한치과보철학회지 = The journal of Korean academy of prosthodontics, 45(1): 12~20 
  3. Park, Chan-Yong ; Jeon, Young-Chan ; Jeong, Chang-Mo ; Yun, Mi-Jung 2009. "An in-vitro wear study of human enamel opposing heat-pressed ceramics" 대한치과보철학회지 = The journal of Korean academy of prosthodontics, 47(1): 21~28 
  4. Lee, In-Seob ; Kim, Jeong-Mi ; Dong, Jin-Keun 2010. "Fracture strength of zirconia ceramic crowns according to tooth position" 대한치과보철학회지 = The journal of Korean academy of prosthodontics, 48(2): 94~100 

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