All-ceramic Crown용 도재의 굽힘강도에 관한 비교연구
A comparative study on the flexure strength of the ceramics for all-ceramic crowns
유형우, 송창용, 배태성, 송광엽, 박찬운,
소속 상세정보
유형우 ( Yu Hyoung-Woo ) - 전북대학교 치과대학 치과보철학교실
송창용 ( Song Chang-Yong ) - 전북대학교 치과대학 치과보철학교실
배태성 ( Bae Tae-Sung ) - 전북대학교 치과대학 치과보철학교실
송광엽 ( Song Kwang-Yeob ) - 전북대학교 치과대학 치과보철학교실
박찬운 ( Park Charn-Woon ) - 전북대학교 치과대학 치과보철학교실
KMID : 0362419940320020195
Abstract
The purpose of this study was to evaluate the fracture resistance of the four kinds of dental porcelains for the all-ceramic crown(Vita In-Ceram, vita Hi-Ceram,IPS-Empress, Vitadur-N) and one kind for the metal-ceramic crown(Vita VMK 68) was used as the control group. In order to determine the fracture resistance, the bi-axial flexure strength was measured at a crosshead speed of 0.5mm/min, and the Vickers hadrness was measured at an indentation load of 1kg for 20 seconds. @ES The results obtained were summarized as follows: @EN 1. The maximum Weibull modulus of 24.61 for Vitadur-N and the minimum one the minimum one of 8.82 for IPS-Empress were observed ; the maximum characteristic strength of 353.26Mpa for Vita In-Ceram and the minimum that of 63.20MPa for Vitadur-N were also observed. 2. The maximum mean bi-axial flexure strength of 339.12MPa for Vita In-Ceram and thd minimum one of 61.99MPa for Vitadur-N were calculated.
Results of the Scheffe test indicated that the statistically significant difference (P<0.05) existed between Vita In-Ceram or Vita Hi-Ceram and the others ; also between IPS-Empress and Vitadur-N. 3. The maximum mean hardness of 980.55kg/㎟for Vita VMK 68 appeared. Results of the Scheffe test indicated that statistically significant difference(P<0.05) existed between Vita In-Ceram or Vita Hi-Ceram and the others ; also between IPS-Empress and Vita VMK 68.
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