Accuracy and reproducibility of intraoral scanning in vivo

Abstract

Abstract: PURPOSE: To evaluate the accuracy and reproducibility of intraoral scanning system by comparing linear measurements obtained from conventional models and digital models. METHODS: Both conventional models (control group) and intraoral scanning (experimental group) of 5 volunteers were made. After taking silicon impressions, the volunteers' oral cavities were scanned directly by Trios Ortho (3 Shape) at 8a.m., 13p.m., 18p.m. and repeated for 15 days. The gypsum models were measured by digital caliper and regarded as golden standard. The intraoral scanning files were measured by Simplant software. A well-trained examiner measured them in random order at 8a.m., 13p.m. and 18p.m. The measurements were repeated for 15 times. Datasets obtained from different groups were compared for accuracy via paired t test. A one-way analysis of variance (ANOVA) was implemented to compare differences within experimental groups for reproducibility using SAS 11.0 software package. RESULTS: There was a significant linear difference between gypsum model and intraoral scanning digital model in the parameter of 23L from volunteer V1 (P<0.01). In terms of accuracy and reproducibility, no significant difference was found (P>0.05). CONCLUSIONS: The accuracy and reproducibility of intraoral scanning on whole arches are quite acceptable in this in vivo study.

Key words: Intraoral scanning, Digital model, Accuracy, Reproducibility

CLC Number:

R783.5

XIE Yi-lun, SHEN Gang. Accuracy and reproducibility of intraoral scanning in vivo[J]. Shanghai Journal of Stomatology, 2016, 25(5): 593-599.

References

[1] Kim JH, Kim KB, Kim WC, et al. Accuracy and precision of polyurethane dental arch models fabricated using a three-dimensional subtractive rapid prototyping method with an intraoral scanning technique [J]. Korean J Orthod, 2014, 44(2): 69-76.
[2] Miyazaki T, Hotta Y, Kunii J, et al. A review of dental CAD/CAM: current status and future perspectives from 20 years of experience [J]. Dent Mater J,2009, 28(1): 44-56.
[3] Sutton AF, McCord JF. Variations in tooth preparations for resin-bonded all-ceramic crowns in general dental practice [J]. Br Dent J, 2001, 191(12): 677-681.
[4] Goodacre CJ, Campagni WV, Aquilino SA. Tooth preparations for complete crowns: an art form based on scientific principles [J]. J Prosthet Dent, 2001, 85(4): 363-376.
[5] Chuembou Pekam F, Marotti J, Wolfart S, et al. High-frequency ultrasound as an option for scanning of prepared teeth: an in vitro study [J]. Ultrasound Med Biol, 2015, 41(1): 309-316.
[6] Patzelt SB, Emmanouilidi A, Stampf S, et al. Accuracy of full-arch scans using intraoral scanners [J]. Clin Oral Investig, 2014, 18(6): 1687-1694.
[7] Rekow ED. Dental CAD/CAM systems: a 20-year success story [J]. J Am Dent Assoc, 2006,137 (Suppl): 5s-6s.
[8] Karl M, Rosch S, Graef F, et al. Strain situation after fixation of three-unit ceramic veneered implant superstructures [J]. Implant Dent, 2005, 14(2): 157-165.
[9] Del'Acqua MA, Arioli-Filho JN, Compagnoni MA, et al. Accuracy of impression and pouring techniques for an implant-supported prosthesis[J]. Int J Oral Maxillofac Implants, 2008, 23(2): 226-236.
[10] Luthardt RG, Loos R, Quaas S. Accuracy of intraoral data acquisition in comparison to the conventional impression [J]. Int J Comput Dent, 2005, 8(4): 283-294.
[11] Mehl A, Ender A, Mörmann W, et al. Accuracy testing of a new intraoral 3D camera [J]. Int J Comput Dent, 2009, 12(1): 11-28.
[12] Ender A, Mehl A. Full arch scans: conventional versus digital impressions- an in-vitro study[J]. Int J Comput Dent, 2011, 14(1): 11-21.
[13] van der Meer WJ, Andriessen FS, Wismeijer D, et al. Application of intra-oral dental scanners in the digital workflow of implantology [J]. PLoS One, 2012, 7(8): e43312.
[14] Galhano GA, Pellizzer EP, Mazaro JV. Optical impression systems for CAD-CAM restorations[J]. J Craniofac Surg, 2012, 23(6): e575-579.
[15] Ender A, Mehl A. Accuracy of complete-arch dental impressions: a new method of measuring trueness and precision [J]. J Prosthet Dent, 2013, 109(2): 121-128.
[16] Miyazaki T, Hotta Y. CAD/CAM systems available for the fabrication of crown and bridge restorations [J]. Aust Dent J, 2011, 56(Suppl 1): 97-106.
[17] 苏庭舒, 孙健. 口内数字化印模技术 [J]. 中华临床医师杂志(电子版), 2012, 6(19): 5780-5782.
[18] Quaas S, Rudolph H, Luthardt RG. Direct mechanical data acquisition of dental impressions for the manufacturing of CAD/CAM restorations [J]. J Dent, 2007, 35(12): 903-908.