Abstract
Objectives
This study aims to evaluate the accuracy of a powder-free three-dimensional (3D) measuring system (CEREC Omnicam, Sirona), when scanning the surface of a material at different angles. Additionally, the influence of water was investigated.
Materials and methods
Nine different materials were combined with human tooth surface (enamel) to create n = 27 specimens. These materials were: Controls (InCoris TZI and Cerec Guide Bloc), ceramics (Vitablocs® Mark II and IPS Empress CAD), metals (gold and amalgam) and composites (Tetric Ceram, Filtek Supreme A2B and A2E). The highly polished samples were scanned at different angles with and without water. The 216 scans were then analyzed and descriptive statistics were obtained.
Results
The height difference between the tooth and material surfaces, as measured with the 3D scans, ranged from 0.83 μm (±2.58 μm) to −14.79 μm (±3.45 μm), while the scan noise on the materials was between 3.23 μm (±0.79 μm) and 14.24 μm (±6.79 μm) without considering the control groups. Depending on the thickness of the water film, measurement errors in the order of 300–1,600 μm could be observed.
Conclusions
The inaccuracies between the tooth and material surfaces, as well as the scan noise for the materials, were within the range of error for measurements used for conventional impressions and are therefore negligible. The presence of water, however, greatly affects the scan.
Clinical relevance
The tested powder-free 3D measuring system can safely be used to scan different material surfaces without the prior application of a powder, although drying of the surface prior to scanning is highly advisable.
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References
Wiedhahn K, Schenk O, Fritzsche G (2012) Cerec Omnicam — Intraoralscan 2.0. Int J Comput Dent 15:199–205
Reich S, Vollborn T, Mehl A, Zimmermann M (2013) Intraoral optical impression systems—an overview. Int J Comput Dent 16:143–162
Kurbad A (2000) The optical conditioning of Cerec preparations with scan spray. Int J Comput Dent 3:269–279
Meyer BJ, Mormann WH, Lutz F (1990) Optimization of the powder application in the Cerec method with environment-friendly propellant systems. Schweiz Monatsschr Zahnmed 100:1462–1468
Ender A, Mehl A (2013) Accuracy of complete-arch dental impressions: a new method of measuring trueness and precision. J Prosthet Dent 109:121–128
Kim SY, Kim MJ, Han JS, Yeo IS, Lim YJ, Kwon HB (2013) Accuracy of dies captured by an intraoral digital impression system using parallel confocal imaging. Int J Prosthodont 26:161–163
Ahmad I (1999) Three-dimensional shade analysis: perspectives of color--Part I. Pract Periodontics Aesthet Dent 11:789–796, quiz 798
Powers JM, Sakaguchi RL (2006) Craig’s restorative dental materials, 12th edn. Mosby/Elsevier, St. Louis
Yu B, Ahn JS, Lee YK (2009) Measurement of translucency of tooth enamel and dentin. Acta Odontol Scand 67:57–64
Kamishima N, Ikeda T, Sano H (2005) Color and translucency of resin composites for layering techniques. Dent Mater J 24:428–432
Yu B, Lee YK (2008) Translucency of varied brand and shade of resin composites. Am J Dent 21:229–232
Yu B, Lee YK (2008) Differences in color, translucency and fluorescence between flowable and universal resin composites. J Dent 36:840–846
Kim SJ, Son HH, Cho BH, Lee IB, Um CM (2009) Translucency and masking ability of various opaque-shade composite resins. J Dent 37:102–107
Ryan EA, Tam LE, McComb D (2010) Comparative translucency of esthetic composite resin restorative materials. J Can Dent Assoc 76:a84
Arimoto A, Nakajima M, Hosaka K, Nishimura K, Ikeda M, Foxton RM, Tagami J (2010) Translucency, opalescence and light transmission characteristics of light-cured resin composites. Dent Mater 26:1090–1097
Nakajima M, Arimoto A, Prasansuttiporn T, Thanatvarakorn O, Foxton RM, Tagami J (2012) Light transmission characteristics of dentine and resin composites with different thickness. J Dent 40(Suppl 2):e77–e82
Horie K, Nakajima M, Hosaka K, Kainose K, Tanaka A, Foxton RM, Tagami J (2012) Influences of composite-composite join on light transmission characteristics of layered resin composites. Dent Mater 28:204–211
Pecho OE, Ghinea R, Ionescu AM, Cardona JD, Paravina RD, Perez MD (2012) Color and translucency of zirconia ceramics, human dentine and bovine dentine. J Dent 40:e34–e40
Nogueira AD, Della Bona A (2013) The effect of a coupling medium on color and translucency of CAD-CAM ceramics. J Dent 41(Suppl 3):e18–e23
Schmeling M, DE Andrada MA, Maia HP, DE Araújo EM (2012) Translucency of value resin composites used to replace enamel in stratified composite restoration techniques. J Esthet Restor Dent 24:53–58
Spyropoulou PE, Giroux EC, Razzoog ME, Duff RE (2011) Translucency of shaded zirconia core material. J Prosthet Dent 105:304–307
Mehl A, Gloger W, Kunzelmann KH, Hickel R (1997) A new optical 3-D device for the detection of wear. J Dent Res 76:1799–1807
Ender A, Mehl A (2015) In-vitro evaluation of the accuracy of conventional and digital methods of obtaining full-arch dental impressions. Quintessence Int 46(1):9–17. doi:10.3290/j.qi.a32244
Chandran DT, Jagger DC, Jagger RG, Barbour ME (2010) Two- and three-dimensional accuracy of dental impression materials: effects of storage time and moisture contamination. Biomed Mater Eng 20:243–249
Caputi S, Varvara G (2008) Dimensional accuracy of resultant casts made by a monophase, one-step and two-step, and a novel two-step putty/light-body impression technique: an in vitro study. J Prosthet Dent 99:274–281
Ceyhan JA, Johnson GH, Lepe X (2003) The effect of tray selection, viscosity of impression material, and sequence of pour on the accuracy of dies made from dual-arch impressions. J Prosthet Dent 90:143–149
Rudolph H, Luthardt RG, Walter MH (2007) Computer-aided analysis of the influence of digitizing and surfacing on the accuracy in dental CAD/CAM technology. Comput Biol Med 37:579–587
Ziegler M (2009) Digital impression taking with reproducibly high precision. Int J Comput Dent 12:159–163
Wostmann B, Rehmann P, Balkenhol M (2009) Accuracy of impressions obtained with dual-arch trays. Int J Prosthodont 22:158–160
Piwowarczyk A, Ottl P, Buchler A, Lauer HC, Hoffmann A (2002) In vitro study on the dimensional accuracy of selected materials for monophase elastic impression making. Int J Prosthodont 15:168–174
Balkenhol M, Ferger P, Wostmann B (2007) Dimensional accuracy of 2-stage putty-wash impressions: influence of impression trays and viscosity. Int J Prosthodont 20:573–575
Logozzo S, Zanetti EM, Franceschini G, Kilpelä A, Mäkynen A (2014) Recent advances in dental optics—Part I. 3D intraoral scanners for restorative dentistry. Opt Lasers Eng 54:203–221
Flugge TV, Schlager S, Nelson K, Nahles S, Metzger MC (2013) Precision of intraoral digital dental impressions with iTero and extraoral digitization with the iTero and a model scanner. Am J Orthod Dentofacial Orthop 144:471–478
Petrie CS, Walker MP, O’Mahony AM, Spencer P (2003) Dimensional accuracy and surface detail reproduction of two hydrophilic vinyl polysiloxane impression materials tested under dry, moist, and wet conditions. J Prosthet Dent 90:365–372
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Kurz, M., Attin, T. & Mehl, A. Influence of material surface on the scanning error of a powder-free 3D measuring system. Clin Oral Invest 19, 2035–2043 (2015). https://doi.org/10.1007/s00784-015-1440-5
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DOI: https://doi.org/10.1007/s00784-015-1440-5