Maximilian Dosch, Falk Schwendicke, Po-Chun Tseng, Benedikt C Spies, Andreas Keßler
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引用次数: 0
Abstract
Objective: To develop realistic training teeth composed of multi-material colours and gradients and evaluate them in comparison with the standard model and extracted teeth with a group of students.
Material and method: Three different teeth were virtually designed by use of multiple STL-compartments and additively manufactured with different material gradients like colour, hardness and functional properties in a single printing process using MultiJet technology. The teeth included simulated hard-/softissues and restorative materials like enamel, dentin, pulp, carious dentin, composite, amalgam, and gutta-percha. The selected teeth were tested by a group of 25 clinical students in a volunteer hands-on course. They had experience in caries removal, post insertion and preparation on real patients. Study procedures included the removal of a faulty direct and indirect restoration, of gutta-percha as well as of carious dentin. The properties of the printed teeth for each task were assessed by the students using grades (1 = very good, 2 = good, 3 = satisfactory, 4 = sufficient, 5 = poor). Conventional model teeth and extracted real teeth served as reference.
Results: In comparison to standard model teeth, printed teeth were rated 1.1 ± 0.7, with a grade of 2.4 ± 1.2 for haptic impression and 1.2 ± 0.8 for realistic perception of the exercise. In comparison to extracted teeth, the colour of the enamel(2.1 ± 1.4), the dentin(1.8 ± 1.3) and the carious lesion(1.2 ± 0.8) were evaluated with overall good or very good values. The new features were rated with 1.2 ± 0.7 for the Amalgam filling, 1.0 ± 0.3 for the caries lesion, 1.4 ± 1.5 for the crown, and 2.0 ± 1.0 for the gutta-percha.
Conclusion: The results of the pilot study confirm the potential of multi-material additive manufacturing for educational purposes. Students preferred printed teeth in comparison with conventional acrylic and extracted teeth, considering the simulation of a training scenario close to clinical reality.
期刊介绍：
The aim of the European Journal of Dental Education is to publish original topical and review articles of the highest quality in the field of Dental Education. The Journal seeks to disseminate widely the latest information on curriculum development teaching methodologies assessment techniques and quality assurance in the fields of dental undergraduate and postgraduate education and dental auxiliary personnel training. The scope includes the dental educational aspects of the basic medical sciences the behavioural sciences the interface with medical education information technology and distance learning and educational audit. Papers embodying the results of high-quality educational research of relevance to dentistry are particularly encouraged as are evidence-based reports of novel and established educational programmes and their outcomes.
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