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  • Quintessence Publishing Deutschland
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Dr. Christian Wesemann

Germany, Berlin
2011-2017: Studium der Zahnmedizin an der Charité - Universitätsmedizin Berlin. 2017: Tätigkeit in einer allgemeinzahnärztlichen Praxis. Seit 2018: Wissenschaftlicher Mitarbeiter in der Abteilung für Zahnärztliche Prothetik, Alterszahnmeidzin und Funktionslehre der Charité - Universitätsmedizin Berlin. Seit 2019: Wissenschaftlicher Mitarbeiter in der Abteilung für Kieferorthopädie, Orthodontie und Kinderzahnheilkunde der Charité - Universitätsmedizin Berlin. Forschungsschwerpunkte: CAD/CAM, Digitale Workflows, Additive Fertigung.

Events

  
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Deutscher Zahnärztetag 2019

8. Nov 2019 — 9. Nov 2019Congress Center Messe Frankfurt
Speakers: Karl-Ludwig Ackermann, Sarah Al-Maawi, Kurt Werner Alt, Jassin Arnold, Thomas Attin, Mustafa Ayna, Anna Greta Barbe, Ingo Baresel, Jens Baresel, Tobias Bauer, Ursula Becker, Wilfried Beckmann, Christoph Benz, Lisa Bitterich, Dirk Bleiel, Uwe Blunck, Martin Boost, Andreas Braun, Anne Bredel-Geissler, Wolfgang Buchalla, Egon Burian, Sebastian Bürklein, Iain L. C. Chapple, Wolfgang Christian, Fabian Cieplik, Bettina Dannewitz, Monika Daubländer, Sybille David-Hebgen, Isabel Deckwer, James Deschner, Annika Döding, Christof Dörfer, Heike Dyrna, Norbert Engel, Peter Engel, Susanne Fath, Michael Frank, Roland Frankenberger, Rene Franzen, Cornelia Frese, Tobias Fretwurst, Michael Gahlert, Roland Garve, Werner Geurtsen, Shahram Ghanaati, Christiane Gleissner, Ulrike Gonder, Werner Götz, Dominik Groß, Knut A. Grötz, Martin Guffart, Norbert Gutknecht, Cornelius Haffner, Thorsten Halling, Frederic Hermann, Carlos Herrera-Vizcaino, Tim Hilgenfeld, Jürgen Hoffmann, Martin Hoffmann, Fabian Huettig, Alfons Hugger, Christine Hutschenreuter, Bruno Imhoff, Silke Jacker-Guhr, Søren Jepsen, A. Rainer Jordan, Alexander Jürchott, Bärbel Kahl-Nieke, Peer W. Kämmerer, Philipp Kanzow, Nele Kettler, Christian Kirschneck, Lydia Kogler, Bernd Kordaß, Franz-Josef Kramer, Norbert Krämer, Felix Krause, Matthis Krischel, Joachim Krois, Christina Kühne, Conrad Kühnöl, Bernd Lapatki, Silke Lehmann-Binder M.Sc., Christian Leonhardt, Ivona Leventic, Daniel Lindel, Jörg Alexander Lisson, Ulrike Lübbert, Elmar Ludwig, Anne-Katrin Lührs, Michael Lüpke, Frank Georg Mathers, Wibke Merten, Georg Meyer, Wolfram Misselwitz, Karin Mölling, Mhd Said Mourad, Dietmar Friedrich Müller, Moritz Mutschler, Katja Nickel, Nicole Nicklisch, Ina Nitschke, Olaf Oberhofer, Karina Obreja, Dietmar Oesterreich, Rebecca Otto, Simon Peroz, Peter Pospiech, Florian Probst, Monika Probst, Michael Rädel, Sven Reich, Katharina Reichenmiller, Katharina Reinecke, Daniel R. Reißmann, Bernd Reiss, Stefan Ries, Christiane Rinnen, Katharina Röher, Jerome Rotgans, Uwe Rudol, Michael Rumpf, Heidrun Schaaf, Claudia Schaller, Karina Schick, Ulrich Schiffner, Maximiliane Amelie Schlenz, Alexander Schmidt, Mathias Schmidt, Andrea-Maria Schmidt-Westhausen, Julian Schmoeckel, Wolfgang Schneider, Sigmar Schnutenhaus, Holger Schön, Andreas Schulte, Nelly Schulz-Weidner, Karola Schulze, Ralf Schulze, Falk Schwendicke, Thomas A. Schwenk, Andreas Simka, Ralf Smeets, Önder Solakoglu, David Sonntag, Hansmartin Spatzier, Benedikt Spies, Norbert Staab, Sabine Steding, Angela Stillhart, Marcus Stoetzer, Hendrik Terheyden, Andrea Thumeyer, Marin Vodanovic, Kai Voß, Maximilian Voß, Wolfgang Wahlster, Michael Walter, Sandra Weber, Almut Johanna Weigel, Paul Weigl, Michael Weiss, Hans-Jürgen Wenz, Johannes-Simon Wenzler, Christian Wesemann, Jens Westemeier, Lotta Westphal, Matthias Widbiller, Annette Wiegand, Horst Willeweit, Karl Frederick Wilms, Sandra Windecker, Michael M. Wolf, Anne Wolowski, Bernd Wöstmann, Sylvia Wuttig
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Quintessenz Verlags-GmbH

This author's journal articles

  
QZ - Quintessenz Zahntechnik, 3/2021
BuchbesprechungPages 334-335, Language: GermanWesemann, Christian

Protocols for Mobile Dental Photography with Auxiliary Lighting

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Quintessence International, 8/2017
DOI: 10.3290/j.qi.a38676, PubMed ID (PMID): 28740969Pages 667-676, Language: EnglishNowak, Roxana / Wesemann, Christian / Robben, Jan / Muallah, Jonas / Bumann, Axel

An in-vitro study comparing the accuracy of full-arch casts digitized with desktop scanners

Objective: The purpose of this study was to evaluate the accuracy of full-arch scans using 11 different cast scanners. Method and Materials: Dental arch length (AL), intermolar width (IMW), and intercanine width (ICW) of the reference plaster casts were measured using a coordinate measuring machine (Zeiss O-Inspect 422). The master cast was subsequently scanned 37 times using 11 desktop scanners (3Shape R500, 3Shape R700, 3Shape R1000, 3Shape R2000, Medianetx grande, Medianetx colori, DentaCore CS ULTRA, Dentaurum OrthoX, Maestro 3D, Imetric IScan D104i, GC Aadva Lab Scan). Using the software Convince Premium 2012 (3Shape), AL, IMW, and ICW were measured on the digital models and compared to the reference plaster cast. Results: The accuracy of the cast scanners differed significantly. The most accurate measurements were given by the cast scanners 3Shape R700 (ICW: 7.4 ± 5.9 µm) and Imetric IScan D104i (ICW: 9.1 ± 4.9 µm). The cast scanners 3Shape R1000 (ICW: 11.2 ± 3.4 µm) and GC Aadva Lab Scan (ICW: 13.8 ± 8.1 µm) yielded comparable measurements. DentaCore (ICW: 26.6 ± 7.5 µm) and Dentaurum OrthoX (ICW: 31.1 ± 24 µm) were significantly less accurate. Conclusion: Almost all scanners demonstrated a level of accuracy so high that further improvement would not provide additional benefit for use in orthodontics. Advancement of the scanners should focus primarily on reducing time and cost. For prosthodontic use, the scanners with the highest accuracy are recommended. Keywords: accuracy, CAD/CAM, desktop scanner, digital model, full-arch scan, plaster cast
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International Journal of Computerized Dentistry, 4/2017
PubMed ID (PMID): 29292411Pages 363-375, Language: English, GermanRobben, Jan / Muallah, Jonas / Wesemann, Christian / Nowak, Roxana / Mah, James / Pospiech, Peter / Bumann, Axel

Suitability and accuracy of CBCT model scan: an in vitro study

Plaster casts can be digitized with desktop scanners, intraoral scanners, and recently also with cone beam computed tomography (CBCT). The aim of this study was to investigate the accuracy of five different CBCT devices digitizing a plaster cast. A study cast serving as a patient was made using the double mix impression technique, and the impression was poured out with plaster. On the resulting plaster cast, arch length (AL), intermolar width (IMW), and intercanine width (ICW) were measured by a coordinate measuring machine (CMM) (Zeiss O-Inspect 422). The patient cast was then scanned by five CBCT devices - CS 9300, CS 9300 Select, CS 8100 3D (all Carestream), Promax 3D Mid (Planmeca), and Whitefox (Acteon) - in eight scan modes. For each CBCT device, 37 scans were performed. The resulting DICOM data were exported as stereolithographic (STL) data and linearly measured using Convince Premium 2012 (3Shape) software. All measurements were compared to the reference master values of the patient cast. The accuracy measurements showed significant differences among the CBCT devices. The highest accuracy was achieved by Whitefox (IMW: mean ± standard deviation (SD): 5.5 ± 5.7 µm) and CS 9300 (IMW: -15 ± 7.4 µm). Comparable results with less accuracy were shown by CS 8100 3D (IMW: -81.2 ± 7.4 µm) and CS 300 Select (IMW: -82.2 ± 6.6 µm). Significantly lower accuracy was shown by Promax 3D Mid (IMW: -126.1 ± 4.8 µm). Some CBCT devices are suitable for the digitization of plaster casts and show very good clinical accuracy. Dental offices equipped with CBCT devices could digitize plaster casts without the need for additional devices. Keywords: CBCT devices, accuracy, indirect digitization, plaster cast, CAD/CAM, stereolithography
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International Journal of Computerized Dentistry, 2/2017
PubMed ID (PMID): 28630956Pages 151-164, Language: English, GermanMuallah, Jonas / Wesemann, Christian / Nowak, Roxana / Robben, Jan / Mah, James / Pospiech, Peter / Bumann, Axel

Accuracy of full-arch scans using intraoral and extraoral scanners: an in vitro study using a new method of evaluation

The aim of this study was to compare the accuracy of six intraoral scanners as regards clinically relevant distances using a new method of evaluation. An additional objective was to compare intraoral scanners with the indirect digitization of model scanners. A resin master model was created by 3D printing and drilled in five places to reflect the following distances: intermolar width (IMW), intercanine width (ICW), and arch length (AL). To determine a gold standard, the distances were measured with a coordinate measuring instrument (Zeiss O-Inspect 422). The master model was scanned 37 times with the following intraoral scanners: Apollo DI (Sirona), CS 3500 (Carestream Dental), iTero (Cadent), PlanScan (Planmeca), Trios (3Shape), and True Definition (3M Espe), and indirectly digitized with the OrthoX Scan (Dentaurum). The digital models were then measured, and deviations from the gold standard calculated. Significant differences were found between the devices. Among the intraoral scanners, Trios and iTero showed the most accurate results, although CS 3500, True Definition, and Apollo DI achieved comparable results. PlanScan demonstrated the highest deviations from the gold standard, and presented a high standard deviation (SD). Direct digitization revealed comparable (and, in fact, slightly higher) accuracy than indirect digitization. Both indirect digitization and most of the intraoral scanners were therefore demonstrated to be suitable for use in the orthodontic office, with the exception of PlanScan, which did not meet the demands of individual orthodontic treatment. Keywords: intraoral scanner, indirect digitization, full-arch scan, digital impression, CAD/CAM, accuracy
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QZ - Quintessenz Zahntechnik, 10/2017
SciencePages 1262-1272, Language: GermanWesemann, Christian / Muallah, Jonas / Nowak, Roxana / Robben, Jan / Bumann, Axel

Genauigkeit von digitalisierten Ganzkiefermodellen

Ein Überblick direkter und indirekter Verfahren für die Kieferorthopädie
Für die Digitalisierung der Patientensituation stehen unterschiedliche direkte und indirekte Verfahren zur Verfügung. In dieser Studie wurde die Genauigkeit von 5 Intraoralscannern, 11 Modellscannern und 4 DVT-Geräten untersucht und mit der Genauigkeit von Modellen, die mittels Stereolithografie-Drucker erstellt wurden, verglichen. Keywords: Intraoralscanner, Modellscanner, DVT, Digitalisierung, Genauigkeit
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Quintessence International, 1/2017
DOI: 10.3290/j.qi.a37130, PubMed ID (PMID): 27834416Pages 41-50, Language: EnglishWesemann, Christian / Muallah, Jonas / Mah, James / Bumann, Axel

Accuracy and efficiency of full-arch digitalization and 3D printing: A comparison between desktop model scanners, an intraoral scanner, a CBCT model scan, and stereolithographic 3D printing

Objective: The primary objective of this study was to compare the accuracy and time efficiency of an indirect and direct digitalization workflow with that of a three-dimensional (3D) printer in order to identify the most suitable method for orthodontic use. Method and Materials: A master model was measured with a coordinate measuring instrument. The distances measured were the intercanine width, the intermolar width, and the dental arch length. Sixty-four scans were taken with each of the desktop scanners R900 and R700 (3Shape), the intraoral scanner TRIOS Color Pod (3Shape), and the Promax 3D Mid cone beam computed tomography (CBCT) unit (Planmeca). All scans were measured with measuring software. One scan was selected and printed 37 times on the D35 stereolithographic 3D printer (Innovation MediTech). The printed models were measured again using the coordinate measuring instrument. Results: The most accurate results were obtained by the R900. The R700 and the TRIOS intraoral scanner showed comparable results. CBCT-3D-rendering with the Promax 3D Mid CBCT unit revealed significantly higher accuracy with regard to dental casts than dental impressions. 3D printing offered a significantly higher level of deviation than digitalization with desktop scanners or an intraoral scanner. The chairside time required for digital impressions was 27% longer than for conventional impressions. Conclusion: Conventional impressions, model casting, and optional digitization with desktop scanners remains the recommended workflow process. For orthodontic demands, intraoral scanners are a useful alternative for full-arch scans. For prosthodontic use, the scanning scope should be less than one quadrant and three additional teeth. Keywords: 3D printed models, accuracy, CBCT model scan, desktop model scanner, digitalization, full-arch scans, intraoral scanner
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