Ragai-Edward Matta1, Bastian Bergauer2, Werner Adler3, Manfred Wichmann4, Hans-Joachim Nickenig5. 1. Department of Prosthodontics (Head: Professor Dr. Manfred Wichmann), Friedrich-Alexander University of Erlangen Nürnberg, Glückstr. 11, 91054 Erlangen, Germany. Electronic address: ragai.matta@uk-erlangen.de. 2. Department of Oral and Maxillofacial Surgery (Head: Professor Dr. Dr. Dr. h.c. Friedrich Wilhelm Neukam), Friedrich-Alexander University of Erlangen Nürnberg, Glückstr. 11, 91054 Erlangen, Germany. 3. Department of Medical Informatics, Biometry and Epidemiology (Head Professor. Dr. rer. nat. Olaf Gefeller, PhD), Friedrich-Alexander-University of Erlangen Nuremberg, Waldstr. 6, 91054 Erlangen, Germany. 4. Department of Prosthodontics (Head: Professor Dr. Manfred Wichmann), Friedrich-Alexander University of Erlangen Nürnberg, Glückstr. 11, 91054 Erlangen, Germany. 5. Department of Oral and Maxillofacial Plastic Surgery and Interdisciplinary, Department of Oral Surgery and Implantology (Head: Professor. J.E. Zöller, MD, DMD), University of Cologne, Kerpener Str. 62, 50937 Köln, Germany.
Abstract
PURPOSE: The use of a surgical template is a well-established method in advanced implantology. In addition to conventional fabrication, computer-aided design and computer-aided manufacturing (CAD/CAM) work-flow provides an opportunity to engineer implant drilling templates via a three-dimensional printer. In order to transfer the virtual planning to the oral situation, a highly accurate surgical guide is needed. The aim of this study was to evaluate the impact of the fabrication method on the three-dimensional accuracy. MATERIALS AND METHODS: The same virtual planning based on a scanned plaster model was used to fabricate a conventional thermo-formed and a three-dimensional printed surgical guide for each of 13 patients (single tooth implants). Both templates were acquired individually on the respective plaster model using an optical industrial white-light scanner (ATOS II, GOM mbh, Braunschweig, Germany), and the virtual datasets were superimposed. Using the three-dimensional geometry of the implant sleeve, the deviation between both surgical guides was evaluated. RESULTS: The mean discrepancy of the angle was 3.479° (standard deviation, 1.904°) based on data from 13 patients. Concerning the three-dimensional position of the implant sleeve, the highest deviation was in the Z-axis at 0.594 mm. The mean deviation of the Euclidian distance, dxyz, was 0.864 mm. CONCLUSION: Although the two different fabrication methods delivered statistically significantly different templates, the deviations ranged within a decimillimeter span. Both methods are appropriate for clinical use.
PURPOSE: The use of a surgical template is a well-established method in advanced implantology. In addition to conventional fabrication, computer-aided design and computer-aided manufacturing (CAD/CAM) work-flow provides an opportunity to engineer implant drilling templates via a three-dimensional printer. In order to transfer the virtual planning to the oral situation, a highly accurate surgical guide is needed. The aim of this study was to evaluate the impact of the fabrication method on the three-dimensional accuracy. MATERIALS AND METHODS: The same virtual planning based on a scanned plaster model was used to fabricate a conventional thermo-formed and a three-dimensional printed surgical guide for each of 13 patients (single tooth implants). Both templates were acquired individually on the respective plaster model using an optical industrial white-light scanner (ATOS II, GOM mbh, Braunschweig, Germany), and the virtual datasets were superimposed. Using the three-dimensional geometry of the implant sleeve, the deviation between both surgical guides was evaluated. RESULTS: The mean discrepancy of the angle was 3.479° (standard deviation, 1.904°) based on data from 13 patients. Concerning the three-dimensional position of the implant sleeve, the highest deviation was in the Z-axis at 0.594 mm. The mean deviation of the Euclidian distance, dxyz, was 0.864 mm. CONCLUSION: Although the two different fabrication methods delivered statistically significantly different templates, the deviations ranged within a decimillimeter span. Both methods are appropriate for clinical use.
Authors: Lukas Postl; Thomas Mücke; Stefan Hunger; Sabina Noreen Wuersching; Svenia Holberg; Oliver Bissinger; Rainer Burgkart; Michael Malek; Stefan Krennmair Journal: Eur J Med Res Date: 2022-07-02 Impact factor: 4.981
Authors: Lukas Postl; Thomas Mücke; Stefan Hunger; Oliver Bissinger; Michael Malek; Svenia Holberg; Rainer Burgkart; Stefan Krennmair Journal: Eur J Med Res Date: 2021-03-15 Impact factor: 2.175
Authors: S Chhatwani; K Schudlich; S C Möhlhenrich; A Pugachev; A Bicsak; B Ludwig; S Hassfeld; G Danesh; L Bonitz Journal: Clin Oral Investig Date: 2021-05-05 Impact factor: 3.573