Materials (Basel) Materials (Basel) Accuracy Evaluation of Indirect Bonding Techniques for Clear Aligner Attachments Using 3D-Printed Models: An In Silico and Physical Model-Based Study Raluca Fratila Cosmina Alonso-Ezpeleta Luis Óscar Universidad de Zaragoza Poveda-Saenz Manuel Giovannini Giovanni Lobo-Galindo Ana Belén Flores-Fraile Javier Zubizarreta-Macho Álvaro 2025 research-article