Engineered Bi₂O₃ and BaSO4-PMMA composites for intraoral applications: Achieving radiation shielding and structural durability through microparticle synergy. - Zanelli WS; de Souza PV; Sacilotto CV; Niccoluci P; Puppin-Rontani RM (Dental materials : official publication of the Academy of Dental Materials, 2026)