Skip to main content
Erschienen in: Clinical Oral Investigations 4/2013

01.05.2013 | Original Article

Accuracy of digital models obtained by direct and indirect data capturing

verfasst von: Jan-Frederik Güth, Christine Keul, Michael Stimmelmayr, Florian Beuer, Daniel Edelhoff

Erschienen in: Clinical Oral Investigations | Ausgabe 4/2013

Einloggen, um Zugang zu erhalten

Abstract

Objectives

With direct and indirect digitalisation, two access points to CAD/CAM-generated restorations are available. The aim of this study was to compare the accuracy of the single steps of both approaches by comparing construction datasets using a new methodology.

Material and method

Twelve test datasets were generated in vitro (1) with the Lava Chairside Oral Scanner (COS) (2) by digitizing polyether impressions (IMP) and (3) by scanning the referring gypsum cast by the Lava Scan ST laboratory scanner (ST) at a time. Using an inspection software, these datasets were superimposed by a best fit algorithm with the reference dataset (REF), gained from industrial computed tomography, and divergences were analysed.

Results

On the basis of average positive and negative deviations between test- and REF datasets, it could be shown that direct digitalisation accomplished the most accurate results (COS, 17 μm/−13 μm; SD ± 19 μm), followed by digitized polyether impression (IMP, 23 μm/−22 μm; SD ± 31 μm) and indirect digitalisation (ST, 36 μm/−35 μm; SD ± 52 μm). The mean absolute values of Euclidean distances showed the least values for COS (15 μm; SD ± 6 μm), followed by IMP (23 μm; SD ± 9 μm) and ST (36 μm; SD ± 7 μm). The mean negative and mean absolute values of all groups were significantly different. Comparing the mean positive values of the groups, IMP and COS (p = 0.082) showed no significant difference, whereas ST and COS, and ST and IMP exhibited statistically significant differences.

Conclusions

Within the limitations of this in vitro study, the direct digitalisation with Lava C.O.S. showed statistically significantly higher accuracy compared to the conventional procedure of impression taking and indirect digitalisation.

Clinical relevance

Within the limitations of this study, the method of direct digitalisation seems to have the potential to improve the accuracy of impressions for four-unit FDPs.
Literatur
1.
Zurück zum Zitat Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y (2009) A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J 28:44–56PubMedCrossRef Miyazaki T, Hotta Y, Kunii J, Kuriyama S, Tamaki Y (2009) A review of dental CAD/CAM: current status and future perspectives from 20 years of experience. Dent Mater J 28:44–56PubMedCrossRef
2.
Zurück zum Zitat DIN 13995: 2010‐02. Dentistry‐Terminology of process‐chain for CAD/CAM‐Systems. (NADENT: NA 014‐00‐05‐06 AK) DIN 13995: 2010‐02. Dentistry‐Terminology of process‐chain for CAD/CAM‐Systems. (NADENT: NA 014‐00‐05‐06 AK)
3.
Zurück zum Zitat Beuer F, Schweiger J, Edelhoff D (2008) Digital dentistry: an overview of recent developments for CAD/CAM generated restorations. Br Dent J 204:505–511PubMedCrossRef Beuer F, Schweiger J, Edelhoff D (2008) Digital dentistry: an overview of recent developments for CAD/CAM generated restorations. Br Dent J 204:505–511PubMedCrossRef
4.
Zurück zum Zitat Quaas S, Rudolph H, Luthardt RG (2007) Direct mechanical data acquisition of dental impressions for the manufacturing of CAD/CAM restorations. J Dent 35:903–908PubMedCrossRef Quaas S, Rudolph H, Luthardt RG (2007) Direct mechanical data acquisition of dental impressions for the manufacturing of CAD/CAM restorations. J Dent 35:903–908PubMedCrossRef
5.
Zurück zum Zitat Rubel BS (2007) Impression materials: a comparative review of impression materials most commonly used in restorative dentistry. Dent Clin N Am 51:629–642PubMedCrossRef Rubel BS (2007) Impression materials: a comparative review of impression materials most commonly used in restorative dentistry. Dent Clin N Am 51:629–642PubMedCrossRef
6.
Zurück zum Zitat Persson AS, Andersson M, Oden A, Sandborgh-Englund G (2008) Computer aided analysis of digitized dental stone replicas by dental CAD/CAM technology. Dent Mater 24:1123–1130PubMedCrossRef Persson AS, Andersson M, Oden A, Sandborgh-Englund G (2008) Computer aided analysis of digitized dental stone replicas by dental CAD/CAM technology. Dent Mater 24:1123–1130PubMedCrossRef
7.
Zurück zum Zitat Haim M, Luthardt RG, Rudolph H, Koch R, Walter MH, Quaas S (2009) Randomized controlled clinical study on the accuracy of two-stage putty-and-wash impression materials. Int J Prosthodont 22:296–302PubMed Haim M, Luthardt RG, Rudolph H, Koch R, Walter MH, Quaas S (2009) Randomized controlled clinical study on the accuracy of two-stage putty-and-wash impression materials. Int J Prosthodont 22:296–302PubMed
8.
Zurück zum Zitat Endo T, Finger WJ (2006) Dimensional accuracy of a new polyether impression material. Quintessence Int 37:47–51PubMed Endo T, Finger WJ (2006) Dimensional accuracy of a new polyether impression material. Quintessence Int 37:47–51PubMed
9.
Zurück zum Zitat Christensen GJ (2008) The challenge to conventional impressions. J Am Dent Assoc 139:347–349PubMed Christensen GJ (2008) The challenge to conventional impressions. J Am Dent Assoc 139:347–349PubMed
10.
Zurück zum Zitat Al-Bakri IA, Hussey D, Al-Omari WM (2007) The dimensional accuracy of four impression techniques with the use of addition silicone impression materials. J Clin Dent 18:29–33PubMed Al-Bakri IA, Hussey D, Al-Omari WM (2007) The dimensional accuracy of four impression techniques with the use of addition silicone impression materials. J Clin Dent 18:29–33PubMed
11.
Zurück zum Zitat DIN ISO 5725‐1: 1997‐11. Accuracy (trueness and precision) of measurement methods and results‐Part 1: General prinicples and definitions (ISO 5725‐1:1994) DIN ISO 5725‐1: 1997‐11. Accuracy (trueness and precision) of measurement methods and results‐Part 1: General prinicples and definitions (ISO 5725‐1:1994)
12.
Zurück zum Zitat Steinhäuser-Andresen S, Detterbeck A, Funk C, Krumm M, Kasperl S, Holst A, Hirschfelder U (2011) Pilot study on accuracy and dimensional stability of impression materials using industrial CT technology. J Orofac Orthop 72:111–124PubMedCrossRef Steinhäuser-Andresen S, Detterbeck A, Funk C, Krumm M, Kasperl S, Holst A, Hirschfelder U (2011) Pilot study on accuracy and dimensional stability of impression materials using industrial CT technology. J Orofac Orthop 72:111–124PubMedCrossRef
13.
Zurück zum Zitat Ender A, Mehl A (2011) Full-arch scans: conventional versus digital impressions—an in-vitro study. Int J Comput Dent 14:11–21PubMed Ender A, Mehl A (2011) Full-arch scans: conventional versus digital impressions—an in-vitro study. Int J Comput Dent 14:11–21PubMed
14.
Zurück zum Zitat State of industry (2000) Lab Management Today 16:9–15 State of industry (2000) Lab Management Today 16:9–15
15.
Zurück zum Zitat Mehl A, Ender A, Mörmann W, Attin T (2009) Accuracy testing of a new intraoral 3D camera. Int J Comput Dent 12:11–28PubMed Mehl A, Ender A, Mörmann W, Attin T (2009) Accuracy testing of a new intraoral 3D camera. Int J Comput Dent 12:11–28PubMed
16.
Zurück zum Zitat Luthardt RG, Loos R, Quaas S (2005) Accuracy of intraoral data acquisition in comparison to the conventional impression. Int J Comput Dent 8:283–294PubMed Luthardt RG, Loos R, Quaas S (2005) Accuracy of intraoral data acquisition in comparison to the conventional impression. Int J Comput Dent 8:283–294PubMed
17.
Zurück zum Zitat Christensen GJ (2008) Will digital impressions eliminate the current problems with conventional impressions? J Am Dent Assoc 139(6):761–763PubMed Christensen GJ (2008) Will digital impressions eliminate the current problems with conventional impressions? J Am Dent Assoc 139(6):761–763PubMed
18.
Zurück zum Zitat Christensen GJ (2005) The state of fixed prosthodontics impressions: room for improvement. J Am Dent Assoc 136:343–346PubMed Christensen GJ (2005) The state of fixed prosthodontics impressions: room for improvement. J Am Dent Assoc 136:343–346PubMed
19.
Zurück zum Zitat Güth JF, Keul C, Beuer F, Edelhoff D (2011) Untersuchung zur Reproduzierbarkeit und Genauigkeit der 3D-Ausrichtung zum Vergleich von STL-Datensätzen. Oral presentation #33. DGPro-Jahrestagung, Hamburg, May 14 Güth JF, Keul C, Beuer F, Edelhoff D (2011) Untersuchung zur Reproduzierbarkeit und Genauigkeit der 3D-Ausrichtung zum Vergleich von STL-Datensätzen. Oral presentation #33. DGPro-Jahrestagung, Hamburg, May 14
20.
Zurück zum Zitat Syrek A, Reich G, Ranftl D, Klein C, Cerny B, Brodesser J (2010) Clinical evaluation of all-ceramic crowns fabricated from intraoral digital impressions based on the principle of active wavefront sampling. J Dent 38:553–559PubMedCrossRef Syrek A, Reich G, Ranftl D, Klein C, Cerny B, Brodesser J (2010) Clinical evaluation of all-ceramic crowns fabricated from intraoral digital impressions based on the principle of active wavefront sampling. J Dent 38:553–559PubMedCrossRef
Metadaten
Titel
Accuracy of digital models obtained by direct and indirect data capturing
verfasst von
Jan-Frederik Güth
Christine Keul
Michael Stimmelmayr
Florian Beuer
Daniel Edelhoff
Publikationsdatum
01.05.2013
Verlag
Springer-Verlag
Erschienen in
Clinical Oral Investigations / Ausgabe 4/2013
Print ISSN: 1432-6981
Elektronische ISSN: 1436-3771
DOI
https://doi.org/10.1007/s00784-012-0795-0

Weitere Artikel der Ausgabe 4/2013

Clinical Oral Investigations 4/2013 Zur Ausgabe

Newsletter

Bestellen Sie unseren kostenlosen Newsletter Update Zahnmedizin und bleiben Sie gut informiert – ganz bequem per eMail.