A preliminary study on fit accuracy of removable partial denture frameworks fabricated digitally and conventionally using the micro-CT
Article Sidebar
Main Article Content
Abstract
Objectives: To compare the fit accuracy of the retentive clasps as parts of removable partial denture frameworks fabricated by digitally assisted technique and that fabricated by a conventional procedure using the micro-computed tomography (micro-CT) analysis.
Materials and Methods: A cobalt-chromium (Co-Cr) model with partial edentulous area at the upper right second premolar was constructed and used as a master model. Three groups of removable partial denture frameworks with direct retainers on the upper right first premolar and the upper right first molar were fabricated (n=5). The first group was digitally scanned by an intraoral scanner. In the second group, a conventional impression was taken with alginate, poured with type IV gypsum and digitally scanned by a laboratory scanner. Both groups were virtually surveyed, designed and 3D-printed as resin frameworks prior to lost-wax casting. The third group was conventionally fabricated. The frameworks from each group were then positioned on the Co-Cr master model. The gap widths were analyzed at the terminal end of the retentive clasp using the micro-CT. A two-way ANOVA with a multiple comparison Bonferroni test was used to compare the mean differences of gap width among the groups and the mean differences of gap width between teeth in the same group at 0.05 significance level.
Results: The mean gap width of the second group that received a laboratory scanning was significantly greater than those of the other groups. There was no statistically significant difference between the mean gap width of the frameworks received an intraoral scanning and a conventionally fabricated (p>0.05). Furthermore, the statistically significant difference of the mean gap width between tooth 14 (151.19±1.12µm) and 16 (181.71±8.03µm) was observed only in the second group that received a laboratory scanning (p<0.05).
Conclusion: Removable partial denture frameworks fabricated from digitally-assisted technique with the use of intraoral scanning and a conventional procedure exhibited better fit accuracy than those fabricated digitally with the use of laboratory scanning.
Article Details
References
2. Shams A, Tavanafar S, Dastjerdi MR, Chaijan KA. Patient satisfaction and complication rates after delivery of removable partial dentures: A 4-year retrospective study. SRM J Res Dent Sci. 2015; 6: 225-9.
3. Rudd RW, Rudd KD. A review of 243 errors possible during the fabrication of a removable partial denture: part I. J Prosthet Dent. 2001; 86: 251-61.
4. Rudd RW, Rudd KD. A review of 243 errors possible during the fabrication of a removable partial denture: part II. J Prosthet Dent. 2001; 86: 262-76.
5. Rudd RW, Rudd KD. A review of 243 errors possible during the fabrication of a removable partial denture: part III. J Prosthet Dent. 2001; 86: 277-88.
6. Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y. A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J. 2009; 28: 44-56.
7. Alghazzawi T. Advancements in CAD/CAM technology: Options for practical implementation. J Prosthodont Res. 2016; 60: 72-84.
8. Abduo J, Lyons K, Bennamoun M. Trends in Computer-Aided Manufacturing in Prosthodontics: A Review of the Available Streams. Int J Dent. 2014; 1-15.
9. Nayar S, Bhuminathan S, Bhat WM. Rapid prototyping and stereolithography in dentistry. J Pharm Bioallied Sci. 2015; 7: S216-9.
10. Eggbeer D, Bibb R, Williams R. The computer-aided design and rapid prototyping fabrication of removable partial denture frameworks. Proc Inst Mech Eng H 2005; 219: 195-202.
11. Williams RJ., Bibb R, Rafik T. A technique for fabricating patterns for removable partial denture frameworks using digitized casts and electronic surveying. J Prosthet Dent 2004; 91: 85-8.
12. Hussein OM, Hussein LA. Novel 3D Modeling Technique of Removable Partial Denture Framework Manufactured by 3D Printing Technology. Int J Adv Res. 2014; 2: 686-694.
13. Bibb RJ., Eggbeer D., Williams RJ., Woodward A. Trial fitting of a removable partial denture framework made using computer-aided design and rapid prototyping techniques. Proc Inst Mech Eng H. 2006; 220: 793-7.
14. Williams R. J., Bibb R., Eggbeer D., Collis J. Use of CAD/CAM technology to fabricate a removable partial denture framework. J Prosthet Dent. 2006; 96: 96-9.
15. Lang L. A., Tulunoglu I. A critically appraised topic review of computer-aided design/computer-aided machining of removable partial denture frameworks. Dent Clin North Am. 2014; 58: 247-55.
16. Wakabayashi K, Sohmura T, Nakamura T, Kojima T, Kinuta S, Takahashi J, Yatani H. New evaluation method by microfocus radiograph CT for 3D assessment of internal adaptation of all-ceramic crowns. Dent Mater J. 2005; 24: 362-7.
17. Borba, M., Cesar, P. F., Griggs, J. A., & Della Bona, Á. Adaptation of all-ceramic fixed partial dentures. Dent Mater. 2011; 27: 1119–1126.
18. Swain M. V., Xue J. State of the art of Micro-CT application in dental research. Int J oral Sci. 2009; 1:177-88
19. Shahmoradi M, Swain M.V. Quantitative characterization and micro-CT mineral mapping of natural fissural enamel lesions. J Dent. 2016; 46:23-9
20. Du Plessis A, le Roux S, Els J, Booysen G, Blaine D. Application of microCT to the non-destructive testing of an additive manufactured titanium component. Case Studies in Nondestructive Testing and Evaluation. 2015; 4:1-7.
21. Lee JW., Park JM., Park EJ., Heo SJ., Koak JY., Kim SK. Accuracy of a digital removable partial denture fabricated by casting a rapid prototyped pattern: A clinical study. J Prosthet Dent. 2017; 118; 468-474.
22. Arnold C, Hey J, Schweyen R, Setz JM. Accuracy of CAD-CAM-fabricated removable partial dentures. J Prosthet Dent. 2018; 119: 586-592
23. Carr, Alan B, David T. Brown, and William L. McCracken's Removable Partial Prosthodontics. 13th ed. St. Louis, Mo: Mosby, 2015.
24. Peutzfeldt A, Asmussen E. Accuracy of alginate and elastomeric impression materials. Scand J Dent Res. 1989; 97: 375-9.
25. Hack GD., Patzelt S. Evaluation of the Accuracy of Six Intraoral Scanning Devices: An in-vitro Investigation. J Am Dent Assoc. 2015; 10: 1-5.
26. Luthardt RG, Loos R, Quaas S. Accuracy of intraoral data acquisition in comparison to the conventional impression. Int J Comput Dent. 2005; 8: 283-94.
27. Mangano F, Gandolfi A, Luongo G, Logozzo S. Intraoral scanners in dentistry: a review of the current literature. BMC Oral Health. 2017; 17: 149.
28. Ryakhovskiy A, Kostyukova V. Comparative analysis of 3D data accuracy of single tooth and full dental arch captured by different intraoral and laboratory digital impression systems. Stomatologii︠a︡. 2016; 95 : 65.
29. Ender A., Attin T., Mehl A. In vivo precision of conventional and digital methods of obtaining complete arch dental impressions. J Prosthet Dent. 2016; 115: 313-20.
30. Rudolph H., Salmen H., Moldan M., et al. Accuracy of intraoral and extraoral digital data acquisition for dental restorations. J Appl Oral Sci. 2016; 24 : 85-94
31. Lee KY, Cho JW, Chang NY, Chae JM, Kang KH, Kim SC, Cho JH. Accuracy of three-dimensional printing for manufacturing replica teeth. Korean J Orthod. 2015; 45 : 217-25.
32. Fenlon MR., Juszczyk AS., Hughes RJ., Walter JD., Sherriff M. Accuracy of fit of cobalt–chromium removable partial denture frameworks on master casts. Eur J Prosthodont Restor Dent. 1993; 1: 127–130.
33. Anan MT, Al-Saadi MH. Fit accuracy of metal partial removable dental prosthesis frameworks fabricated by traditional or light curing modeling material technique: An in vitro study. Saudi Dent J. 2015; 27: 149-54.