OBJECTIVES: This study aims to determine the accuracy of 3D printed models after different storage conditions using two different material/printer systems. METHODS: A STL file of a full-arch maxillary cast was used to print 30 models from two different technologies, Carbon 3D and Formlabs 3 printers. The models were printed at 50 micrometers layer thickness. These printed models were randomized into 3 groups per printer (n=5) for storage: Room-temperature (22 ± 2 °C), low-temperature (~4 ± 1 °C), and High-temperature (50 ± 2 °C). Each of the models was scanned at a designated storage time to generate STL files, which were imported into a 3D inspection software for superimposition and evaluation of deviations using 3D comparison, points of reference, and inter-tooth distances. The trueness in this project was the absolute tooth distance difference between the reference and the testing scan. Precision in this project was the standard deviation of the tooth distances among the measurement of duplicate models within each subgroup. A regression model was used to compare the differences among the groups. RESULTS: The trueness and precision of the printed models were found significantly affected by the two printer types and different storage temperatures. Dimension changes were found to be more on the gingiva and the tooth surface of the molar area. Models under high temperatures showed expansion, while models under low temperatures presented shrinkage. Models under room temperature did not show significant distortions in general. Carbon 3D printed models showed higher in-tolerance percentages compared to Formlabs 3. CONCLUSIONS: Different printer types and storage conditions significantly affect the dimension accuracy of 3D printed dental models. Carbon 3D printed models showed less deviation compared with Formlabs 3 in terms of trueness and precision. Storage of 3D printed models at higher temperatures should be avoided to prevent dimension distortion. Lower temperature storage for the Carbon model is recommended.