Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Comparison of marginal fit of metal copings according to wax blocks and oral scanning methods

구강인기법과 왁스블록의 종류에 따른 금속 코핑의 변연적합도 비교

  • Chung, In-Sung (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Kim, Won-Young (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan) ;
  • Jeon, Byung-Wook (Department of Dental Laboratory Science, College of Health Science, Catholic University of Pusan)
  • 정인성 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 김원영 (부산가톨릭대학교 보건과학대학 치기공학과) ;
  • 전병욱 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Received : 2020.07.31
  • Accepted : 2020.09.02
  • Published : 2020.09.30
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Abstract

Purpose: We investigated the marginal fit between abutment and metal copings according to impression technique, wax block types, and metal types. Methods: We selected the traditional impression method of using rubber impression materials and the digital impression method of using oral scanners, three types of wax blocks, and two types of metal, both of which were domestically and commercially available, were selected to produce metal copings, and the marginal fit was determined through the use of silicon replication. Results: The measurements of axial wall fit revealed that the IYV specimens had the best fit, with a mean gap of 24.11±5.95 ㎛, followed by CEV, CHV, CSS, CSV, CES, CHS, and IYS specimens (mean: 33.44±8.41 ㎛). The differences were not statistically significant. The marginal gap measurements showed that the CEV specimen had the smallest gap, 17.25±4.13 ㎛, followed by the CSV, CHV, CSS, CES, CHS, IYV, and IYS specimen (mean: 43.47±15.63 ㎛). The differences were statistically significant. Conclusion: The axial wall fit of the metal coping (VeraBond2V; Aalba Dent, Inc., Fairfield, CA, USA) produced by the lost wax technique with the traditional impression method was excellent. The marginal fit of the metal coping (VeraBond 2V) produced by wax milling with the use of an oral scanner was also excellent. The marginal fit of the metal coping was within the clinically acceptable limits in all groups.

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References

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