Mechanical properties of a polylactic 3D-printed interim crown after thermocycling.

ABSTRACT: Polylactic acid (PLA) has garnered attention for use in interim dental restorations due to its biocompatibility, biodegradability, low cost, ease of fabrication, and moderate strength. However, its performance under intraoral conditions, particularly under heat and moisture, remains underexplored. This study evaluated the mechanical properties of PLA interim crowns compared with those of polymethylmethacrylate (PMMA) and bisphenol crowns under simulated intraoral conditions with thermocycling. Three CAD/CAM polymers-PMMA (milling), PLA (fused deposition), and bisphenol (stereolithography)-were tested for fracture resistance, hardness, and surface roughness. For fracture strength, 25 crowns from each group were cemented onto dies. The Shore D hardness and surface roughness were measured on

SUBMITTER: Doh RM 

PROVIDER: S-EPMC11781676 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature