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KMID : 0355420230470010040
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Journal of Korean Academy of Oral Health
2023 Volume.47 No. 1 p.40 ~ p.46
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Evaluation of fracture strength and translucency of 3D printing resin crown for carious primary anterior tooth
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Ham Young-Jun
Lee Joon-Haeng
Kim Jong-Su
Kim Jong-Bin
Han Mi-Ran
Shin Ji-Sun
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Abstract
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Objectives: The purpose of this study was to compare the fracture strength and traslucency of 3D printing resin crowns according to different thicknesses.
Methods: Resin crowns were designed with CAD software and a 3D scanner, using scanned data of the #61 tooth model. Resin Crowns with different thicknesses were printed using a 3D printer, and subsequently divided into four groups according to thickness (0.3, 0.5, 0.7, and 1.0 mm). Fracture strength was compared among groups with a resin strip crown of 1.0 mm thickness. Compressive force was applied using a universal testing machine at 30° along the lingual surface at 1 mm/min cross head speed. For translucency evaluation, thin square specimens were printed of thicknesses 0.3, 0.5, 0.7, and 1.0 mm, and translucency was measured using a spectrophotometer.
Results: As a result of fracture strength measurement, fracture strength increased as thickness increased, and a significant difference was observed solely between thicknesses of 0.3 and 0.5 mm, and the thicknesses of 0.3 and 0.5 mm (P<0.05). Translucency decreased as thickness increased, and similarly, a significant difference was observed only between thicknesses of 0.3 and 0.5 mm and the thicknesses of 0.7 and 1.0 mm (P<0.05).
Conclusions: A 3D printing resin crown can be used as a clinical option for restoring a primary anterior tooth affected by caries.
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KEYWORD
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3D printing resin crown, Fracture strength, Primary anterior tooth, Translucency parameter
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