These files can be used to 3D print models. Ortho 2.x/Connect 5.2.2 - With the Ortho 2.x software, users can export closed geometry models. STL files are open geometry models only and do not include restoration data. CEREC/Ortho/Connect - With the release of CEREC 4.5, Sirona Connect 4.5 and CEREC Ortho 1.2 softwares, Dentsply Sirona has also introduced an Open Scan Export License which enables users to export STL files from the chairside software.