Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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Accuracy of implant custom abutments according to different radius of curvature value

곡률 반경 값에 따른 임플란트 맞춤형 지대주의 정확도

  • Wol Kang (Department of Dental Laboratory Technology, Daejeon Health University) ;
  • Hyuk-Joon Lee (Department of Dental Laboratory Science and Engineering, Graduate School, Korea University)
  • 강월 (대전보건대학교 치기공학과) ;
  • 이혁준 (고려대학교 일반대학원 보건과학과 치의기공학전공)
  • Received : 2024.08.01
  • Accepted : 2024.08.27
  • Published : 2024.09.30
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Abstract

Purpose: This study aimed to assess the accuracy of implant custom abutments according to the different radii of the curvature value. Methods: Two custom abutments with different radii of the curvature value were designed based on dental computer-aided design. Then, a total of 20 customized abutments, 10 of each design, were milled according to the designs. The fabricated custom abutments were scanned using a model scanner. Using Geomagic Control X (3D Systems) scanned files were superimposed on the designed files to evaluate trueness, and scanned files for each group were superimposed on each other to evaluate precision. Results: The trueness values of radius of curvature value (CV)-0.75 and CV-1.50 were 56.26±5.66 ㎛ and 47.10±2.64 ㎛, respectively. A significant difference (p<0.001) was found between the groups. The precision values of CV-0.75 and CV-1.50 were 26.87±1.24 ㎛ and 26.08±1.03 ㎛, respectively. No significant difference was found between the groups. Conclusion: The radius of the curvature value in the custom abutment design affected the machining accuracy.

Keywords

Acknowledgement

This study was conducted as a result of research by the MinLab Dental Laboratory.

References

  1. Hamilton A, Judge RB, Palamara JE, Evans C. Evaluation of the fit of CAD/CAM abutments. Int J Prosthodont. 2013;26:370-380. 
  2. Kim HS. Fabrication of custom abutment using dental CAD/CAM system. J Korean Dent Assoc. 2012;50:118-125. 
  3. Wu T, Liao W, Dai N, Tang C. Design of a custom angled abutment for dental implants using computer-aided design and nonlinear finite element analysis. J Biomech. 2010;43:1941-1946. 
  4. McLaren EA, Terry DA. CAD/CAM systems, materials, and clinical guidelines for all-ceramic crowns and fixed partial dentures. Compend Contin Educ Dent. 2002;23:637-641, 644, 646 passim; quiz 654. 
  5. Grossmann Y, Pasciuta M, Finger IM. A novel technique using a coded healing abutment for the fabrication of a CAD/CAM titanium abutment for an implant-supported restoration. J Prosthet Dent. 2006;95:258-261. 
  6. Ko KH, Park JH, Cho LR. Considerations for fabrication of CAD-CAM abutments: part I. selection of titanium block and fabrication process. Implantol. 2019;23:46-58. 
  7. Kim JY. Precision comparison analysis of custom abutment and implant fixture [master's thesis]. Seoul: Hoseo Unversity, 2017. 
  8. Priest G. Virtual-designed and computer-milled implant abutments. J Oral Maxillofac Surg. 2005;63:22-32. 
  9. Hamza TA, Ezzat HA, El-Hossary MM, Katamish HA, Shokry TE, Rosenstiel SF. Accuracy of ceramic restorations made with two CAD/CAM systems. J Prosthet Dent. 2013;109:83-87. 
  10. Cho BM, Lee DJ. A study on cutting characteristics according to cutting direction in ball-end milling. Trans Korean Soc Mach Tool Eng. 2007;16:191-197. 
  11. Schaefer O, Kuepper H, Thompson GA, Cachovan G, Hefti AF, Guentsch A. Effect of CNC-milling on the marginal and internal fit of dental ceramics: a pilot study. Dent Mater. 2013;29:851-858. 
  12. Gok A, Gologlu C, Demirci HI. Cutting parameter and tool path style effects on cutting force and tool deflection in machining of convex and concave inclined surfaces. Int J Adv Manuf Technol. 2013;69:1063-1078. 
  13. Kim CM, Kim SR, Cho MH. Effect of drill radius setting on prosthesis machining. J Korean Acad Dent Technol. 2018;40:1-8. 
  14. Huh JB, Shim JS. The factors caused errors in the production process of CAD/CAM prosthesis based on experience. J Korean Dent Assoc. 2014;52:332-345. 
  15. Lee SY, Chung IS, Jeon BW. The effect of abutment inclined angle on the marginal fit of zirconia all-ceramic crown. J Korean Acad Dent Technol. 2016;38:111-117. 
  16. Hong MH, Choi SM, Kwon TY. Evaluation on machining accuracy according to convergence angle and radius of curvature value used for fabricating custom abutments. Korean J Dent Mater. 2017;44: 329-336. 
  17. Kim KD. Abutment+Crown One-step Solution [Internet]. 2804 magazine; 2018 [cited 2018 Sep 13]. Available from: https://dental2804.com/bbs/exhi_best/1943554 
  18. 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. 
  19. Kim RJ, Park JM, Shim JS. Accuracy of 9 intraoral scanners for complete-arch image acquisition: a qualitative and quantitative evaluation. J Prosthet Dent. 2018;120:895-903.e1. 
  20. Huh JB, Shim JS. The factors caused errors in the production process of CAD/CAM prosthesis based on experience. J Korean Dent Assoc. 2014;52:332-345. 
  21. Khaledi AA, Farzin M, Akhlaghian M, Pardis S, Mir N. Evaluation of the marginal fit of metal copings fabricated by using 3 different CAD-CAM techniques: milling, stereolithography, and 3D wax printer. J Prosthet Dent. 2020;124:81-86. 
  22. Kim SM, Lee KB. Posterior single implant prosthesis using scannable healing abutment. J Korean Acad Prosthodont. 2019;57:432-438.