Litcius/Paper detail

Trueness of stereolithography ZrO<sub>2</sub> crowns with different build directions

Ha-Bin Lee, Eun-Jeong BEA, Wan‐Sun Lee, Ji‐Hwan Kim

2022Dental Materials Journal14 citationsDOIOpen Access PDF

Abstract

This study aims to measure the trueness of zirconia crowns with different build directions of materials fabricated using the stereolithography (SLA) method. The anatomic contour crown of prepped maxillary right first molar was designed using CAD software to obtain the standard tessellation language (STL) file. Two different build directions were set for the crowns using Materialize Magics software. One group was built with a margin base platform, while the other group was built in the direction opposite to the occlusal surface base platform. The 20 crown-shaped parts were printed. The STL files of scanned printing zirconia crowns were superimposed each segment by the 3D analysis software. The two groups were statistically analyzed using t-tests. Significant differences were found in the marginal and internal discrepancies between the groups. The build direction had a significant influence on the accuracy of the zirconia crown. The results indicate the most effective build direction for manufacturing SLA 3D-printed crowns.

Topics & Concepts

StereolithographyCrown (dentistry)Materials scienceSoftwareCubic zirconiaEngineering drawingMargin (machine learning)Base (topology)Tessellation (computer graphics)Rapid prototypingOrthodonticsComputer scienceComputer graphics (images)Composite materialEngineeringMathematicsCeramicMedicineMathematical analysisMachine learningProgramming languageDental materials and restorationsAdditive Manufacturing and 3D Printing TechnologiesAnatomy and Medical Technology