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Accuracy of computer-aided design/computer-aided manufacturing-generated dental casts based on intraoral scanner data.
J Am Dent Assoc. 2014 Nov; 145(11):1133-40.JA

Abstract

BACKGROUND

Little is known about the accuracy of physical dental casts that are based on three-dimensional (3D) data from an intraoral scanner (IOS). Thus, the authors conducted a study to evaluate the accuracy of full-arch stereolithographic (SLA) and milled casts obtained from scans of three IOSs.

METHODS

The authors digitized a polyurethane model using a laboratory reference scanner and three IOSs. They sent the scans (n = five scans per IOS) to the manufacturers to produce five physical dental casts and scanned the casts with the reference scanner. Using 3D evaluation software, the authors superimposed the data sets and compared them.

RESULTS

The mean trueness values of Lava Chairside Oral Scanner C.O.S. (3M ESPE, St. Paul, Minn.), CEREC AC with Bluecam (Sirona, Bensheim, Germany) and iTero (Align Technology, San Jose, Calif.) casts were 67.50 micrometers (95 percent confidence interval [CI], 63.43-71.56), 75.80 μm (95 percent CI, 71.74-79.87) and 98.23 μm (95 percent CI, 94.17-102.30), respectively, with a statistically significant difference among all of the scanners (P < .05). The mean precision values were 13.77 μm (95 percent CI, 2.76-24.79), 21.62 μm (95 percent CI, 10.60-32.63) and 48.83 μm (95 percent CI, 37.82-59.85), respectively, with statistically significant differences between CEREC AC with Bluecam and iTero casts, as well as between Lava Chairside Oral Scanner C.O.S. and iTero casts (P < .05).

CONCLUSION

All of the casts showed an acceptable level of accuracy; however, the SLA-based casts (CEREC AC with Bluecam and Lava Chairside Oral Scanner C.O.S.) seemed to be more accurate than milled casts (iTero).

PRACTICAL IMPLICATIONS

On the basis of the results of this investigation, the authors suggested that SLA technology was superior for the fabrication of dental casts. Nevertheless, all of the investigated casts showed clinically acceptable accuracy. Clinicians should keep in mind that the highest deviations might occur in the distal areas of the casts.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Patzelt SB
Dr. Patzelt is an associate professor, scientific associate and the vice director, postgraduate program, Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center-University of Freiburg, Baden-Württemberg, Germany. He also is a visiting scholar and a research professor, Department of Periodontics, School of Dentistry, University of Maryland, Baltimore. Address correspondence to Dr. Patzelt at Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center-University of Freiburg, Huggstetter Strasse 55, 79106 Freiburg, Germany, e-mail sebastian.patzelt@uniklinik-freiburg.de.
Bishti S
Dr. Bishti was a doctoral candidate, Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center-University of Freiburg, Baden-Württemberg, Germany, when this article was written. She now is an assistant professor, Department of Removable Prosthodontics, School of Dentistry, University of Zawia, Libya.
Stampf S
Dr. Stampf is a biostatistician, Clinical Epidemiology, Department of Clinical Research, University Hospital Basel, Switzerland.
Att W
Dr. Att is an associate professor and the director, Postgraduate Program, Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center-University of Freiburg, Baden-Württemberg, Germany.

MeSH

Computer-Aided DesignDental Impression TechniqueDimensional Measurement AccuracyHumansImage Processing, Computer-AssistedImaging, Three-DimensionalModels, DentalPolyurethanesSoftware

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25359645

Citation

Patzelt, Sebastian B M., et al. "Accuracy of Computer-aided Design/computer-aided Manufacturing-generated Dental Casts Based On Intraoral Scanner Data." Journal of the American Dental Association (1939), vol. 145, no. 11, 2014, pp. 1133-40.
Patzelt SB, Bishti S, Stampf S, et al. Accuracy of computer-aided design/computer-aided manufacturing-generated dental casts based on intraoral scanner data. J Am Dent Assoc. 2014;145(11):1133-40.
Patzelt, S. B., Bishti, S., Stampf, S., & Att, W. (2014). Accuracy of computer-aided design/computer-aided manufacturing-generated dental casts based on intraoral scanner data. Journal of the American Dental Association (1939), 145(11), 1133-40. https://doi.org/10.14219/jada.2014.87
Patzelt SB, et al. Accuracy of Computer-aided Design/computer-aided Manufacturing-generated Dental Casts Based On Intraoral Scanner Data. J Am Dent Assoc. 2014;145(11):1133-40. PubMed PMID: 25359645.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Accuracy of computer-aided design/computer-aided manufacturing-generated dental casts based on intraoral scanner data. AU - Patzelt,Sebastian B M, AU - Bishti,Shaza, AU - Stampf,Susanne, AU - Att,Wael, PY - 2014/11/1/entrez PY - 2014/11/2/pubmed PY - 2015/10/2/medline KW - Intraoral scanner KW - accuracy KW - dental casts KW - digital impression KW - milling KW - precision KW - stereolithography KW - trueness SP - 1133 EP - 40 JF - Journal of the American Dental Association (1939) JO - J Am Dent Assoc VL - 145 IS - 11 N2 - BACKGROUND: Little is known about the accuracy of physical dental casts that are based on three-dimensional (3D) data from an intraoral scanner (IOS). Thus, the authors conducted a study to evaluate the accuracy of full-arch stereolithographic (SLA) and milled casts obtained from scans of three IOSs. METHODS: The authors digitized a polyurethane model using a laboratory reference scanner and three IOSs. They sent the scans (n = five scans per IOS) to the manufacturers to produce five physical dental casts and scanned the casts with the reference scanner. Using 3D evaluation software, the authors superimposed the data sets and compared them. RESULTS: The mean trueness values of Lava Chairside Oral Scanner C.O.S. (3M ESPE, St. Paul, Minn.), CEREC AC with Bluecam (Sirona, Bensheim, Germany) and iTero (Align Technology, San Jose, Calif.) casts were 67.50 micrometers (95 percent confidence interval [CI], 63.43-71.56), 75.80 μm (95 percent CI, 71.74-79.87) and 98.23 μm (95 percent CI, 94.17-102.30), respectively, with a statistically significant difference among all of the scanners (P < .05). The mean precision values were 13.77 μm (95 percent CI, 2.76-24.79), 21.62 μm (95 percent CI, 10.60-32.63) and 48.83 μm (95 percent CI, 37.82-59.85), respectively, with statistically significant differences between CEREC AC with Bluecam and iTero casts, as well as between Lava Chairside Oral Scanner C.O.S. and iTero casts (P < .05). CONCLUSION: All of the casts showed an acceptable level of accuracy; however, the SLA-based casts (CEREC AC with Bluecam and Lava Chairside Oral Scanner C.O.S.) seemed to be more accurate than milled casts (iTero). PRACTICAL IMPLICATIONS: On the basis of the results of this investigation, the authors suggested that SLA technology was superior for the fabrication of dental casts. Nevertheless, all of the investigated casts showed clinically acceptable accuracy. Clinicians should keep in mind that the highest deviations might occur in the distal areas of the casts. SN - 1943-4723 UR - https://www.unboundmedicine.com/medline/citation/25359645/Accuracy_of_computer_aided_design/computer_aided_manufacturing_generated_dental_casts_based_on_intraoral_scanner_data_ DB - PRIME DP - Unbound Medicine ER -