BMC Oral Health
Marginal adaptation of 3D-printed crowns: influence of preparation geometry and digitization workflow
Abstract Background This in vitro study evaluated the impact of different workflow and finish line design on the marginal adaptation of 3D printed resin matrix ceramic crowns. Methods Forty extracted mandibular molars were randomly allocated into two groups according to finish line design ( n = 20); heavy chamfer 0.8 mm (H) and conservative chamfer 0.2 mm (C). Each main group was divided into 2 subgroups ( n = 10) according to workflow; direct digital intraoral scanning workflow (D) and semi-digital workflow (S). C …