Evaluation on the Marginal Fitness of Zirconia Core fabricated with CAD/CAM System

CAD/CAM 시스템으로 제작한 지로코니아 코어의 변연 적합도 평가

  • 노형록 (전북대학교 바이오나노시스템공학과) ;
  • 선금주 (광주보건대학교 치기공과) ;
  • 주규지 (광주보건대학교 치기공과)
  • Received : 2013.08.14
  • Accepted : 2013.09.24
  • Published : 2013.11.28


The purpose of this study was to evaluate the marginal fitnesses on the effect of span length of bridge and the marginal gaps within the clinically allowed range. The samples were fabricated with zirconia core using CAD/CAM system. The test groups were divided by four groups, single crown, 2-units bridge, 3-units bridge and 4-units bridge and 10 zirconia cores per each group. The results of mean marginal gaps were $42.95{\pm}6.93{\mu}m$ in the single crown, $43.53{\pm}5.27{\mu}m$ in 2-unit, $53.43{\pm}13.38{\mu}m$ in 3-unit, and $50.85{\pm}8.25{\mu}m$ in 4-unit on each. The marginal gap of mesial and distal surfaces were statistically significant differences between single, 2-unit group and 3-unit, 4-unit group (p<.05) and this results was effected by the span length. The buccal and lingual surfaces were no statistically significant differences within all groups(p>.05). From this results the span length of the zirconia core may have influence on marginal fitness and the marginal gaps were within the clinically allowed range.


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