OBJECTIVE: ) of multi-yttria-layered 3Y/5Y-partially stabilized zirconia (PSZ) in various zones (incisal, transition, and core). MATERIALS AND METHODS: PT = 0.62. RESULTS: in all zones (p < 0.001). The incisal zone subjected to conventional sintering demonstrated the highest translucency (10.09 ± 0.43). CONCLUSIONS: Speed sintering significantly reduces the optical properties of multi-yttria-layered zirconia, especially in the esthetically crucial incisal zone, resulting in clinically unacceptable color shifts and decreased translucency relative to conventional sintering methods. CLINICAL SIGNIFICANCE: While speed sintering significantly reduces time in the digital workflow, it may negatively impact the final aesthetic outcome of multi-yttria-layered zirconia restorations by compromising optical properties and reducing translucency in the incisal and transition zones. When maximum aesthetic integration is needed for anterior restorations, clinicians and lab technicians should prioritize conventional sintering.
Rahawi et al. (Thu,) studied this question.