대한치과기공학회지 (Journal of Technologic Dentistry)

  • 제42권4호
  • /
  • Pages.321-325
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  • 2020
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  • 1229-3954(pISSN)
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  • 2288-5218(eISSN)
대한치과기공학회 (Korean Academy of Dental Technology)
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다양한 석고제품으로 제작한 석고 모형의 정확성의 평가: 3차원 이미지의 컴퓨터 지원 분석

Three-dimensional evaluation of stone models made of various gypsum products

  • 김욱태 (신한대학교 바이오생태보건대학 치기공학과)
  • Kim, Wook Tae (Department of Dental Technology and Science, College of Biotechnology and Health, Shinhan University)
  • 투고 : 2020.09.29
  • 심사 : 2020.11.24
  • 발행 : 2020.12.30
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초록

Purpose: This study is to evaluate the accuracy of gypsum replica models made from various gypsum products. Methods: One main model was made of stainless steel by CNC milling process. Molds were formed from the main model, and the gypsum replica models were made using 8 types of type IV gypsum, 10 pieces each. The main model was digitized by a contact scanner (Incise; Renishaw) and the gypsum replicas were digitized by an optical scanner (E4; 3Shape A/S). The difference between the main model and the gypsum replicas were measured by inspection software (3D Systems). One-way ANOVA was performed to evaluate the statistical significance of differences between groups. In addition, the independent sample T test was performed to determine the difference between the conventional and scannable stone group (n=10, α=0.05). Results: The root mean square of the stone models were 7.24 ㎛ to 10.78 ㎛, and statistical significance was found between the two groups (SR, FR) and the other 6 groups (IS, SG, CA, CS, ER, EBG) (p<0.05). The accuracy of the gypsum replicas was 9.04 ㎛ and 7.62 ㎛ in the conventional and scannable stone group, respectively. There was statistical significance between the two groups (p<0.01). Conclusion: In the limited results of this study, the product with low setting expansion and the scannable showed high accuracy. Therefore, in order to obtain a stable and accurate scan model, it is more effective in terms of accuracy to use a scannable stone with a low setting expansion.

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참고문헌

  1. Poggio CE, Dosoli R, Ercoli C. A retrospective analysis of 102 zirconia single crowns with knife-edge margins. J Prosthet Dent. 2012;107:316-321. https://doi.org/10.1016/S0022-3913(12)60083-3
  2. Guth JF, Keul C, Stimmelmayr M, Beuer F, Edelhoff D. Accuracy of digital models obtained by direct and indirect data capturing. Clin Oral Investig. 2013;17:1201-1208. https://doi.org/10.1007/s00784-012-0795-0
  3. Beuer F, Schweiger J, Edelhoff D. Digital dentistry: an overview of recent developments for CAD/CAM generated restorations. Br Dent J. 2008;204:505-511. https://doi.org/10.1038/sj.bdj.2008.350
  4. Heshmati RH, Nagy WW, Wirth CG, Dhuru VB. Delayed linear expansion of improved dental stone. J Prosthet Dent. 2002;88:26-31. https://doi.org/10.1067/mpr.2002.127653
  5. Bailey JH, Donovan TE, Preston JD. The dimensional accuracy of improved dental stone, silverplated, and epoxy resin die materials. J Prosthet Dent. 1988;59:307-310. https://doi.org/10.1016/0022-3913(88)90178-3
  6. Rosenstiel SF, Land MF, Fujimoto J. Contemporary fixed prosthodontics. 4th ed. St. Louis (MO): Mosby, 2006.
  7. American National Standards Institute, American Dental Association. Specification no. 25 for dental gypsum products. New York (NY): ANSI, 2000.
  8. Anusavice KJ, Phillips RW, Shen C, Rawls HR. Phillips' science of dental materials. 12th ed. St. Louis (MO): Elsevier/Saunders, 2013.
  9. Winkler MM, Monaghan P, Gilbert JL, Lautenschlager EP. Comparison of four techniques for monitoring the setting kinetics of gypsum. J Prosthet Dent. 1998;79:532-536. https://doi.org/10.1016/S0022-3913(98)70174-X
  10. Alghazzawi TF, Al-Samadani KH, Lemons J, Liu PR, Essig ME, Bartolucci AA, et al. Effect of imaging powder and CAD/CAM stone types on the marginal gap of zirconia crowns. J Am Dent Assoc. 2015;146:111-120. https://doi.org/10.1016/j.adaj.2014.10.006
  11. Kim KB, Kim JH, Kim WC, Kim JH. Three-dimensional evaluation of gaps associated with fixed dental prostheses fabricated with new technologies. J Prosthet Dent. 2014;112:1432-1436. https://doi.org/10.1016/j.prosdent.2014.07.002
  12. Yuan FS, Sun YC, Wang Y, Lu PJ. Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation. Int J Oral Sci. 2013;5:155-161. https://doi.org/10.1038/ijos.2013.49
  13. Mahmood DJ, Linderoth EH, Vult Von Steyern P. The influence of support properties and complexity on fracture strength and fracture mode of all-ceramic fixed dental prostheses. Acta Odontol Scand. 2011;69:229-237. https://doi.org/10.3109/00016357.2010.549508
  14. Persson AS, Andersson M, Oden A, Sandborgh-Englund G. Computer aided analysis of digitized dental stone replicas by dental CAD/CAM technology. Dent Mater. 2008;24: 1123-1130. https://doi.org/10.1016/j.dental.2008.01.008
  15. Luthardt RG, Koch R, Rudolph H, Walter MH. Qualitative computer aided evaluation of dental impressions in vivo. Dent Mater. 2006;22:69-76. https://doi.org/10.1016/j.dental.2005.02.015
  16. Cho SH, Schaefer O, Thompson GA, Guentsch A. Comparison of accuracy and reproducibility of casts made by digital and conventional methods. J Prosthet Dent. 2015; 113:310-315. https://doi.org/10.1016/j.prosdent.2014.09.027