3D-Printed versus Conventionally Fabricated Scaffolds for Alveolar Bone Regeneration: A Narrative Review of Architecture, Mechanical Properties, and Regenerative Outcomes Michael Josef Kridanto Kamadjaja1*, Mefina Kuntjoro1, Jesslyn Azalia2 Abstract Background: Alveolar ridge deficiency frequently requires bone augmentation before dental implant placement, and scaffold-based grafts are increasingly used as alternatives to autogenous