In Vitro Evaluation of Translucency and Color Stability of CAD/CAM Polymer‐Infiltrated Ceramic Materials after Accelerated Aging

• DOI: 10.1111/jopr.13239
• Publication Date: 2020-08-28T06:14:57Z
• Authors: Mohammad D. Al Amri; Nawaf Labban; Saleh Alhijji; Hassan Alamri; Mounir Iskandar; Jeffrey A. Platt
• Keywords: Distilled water; Acrylic resin; Immersion; Carbamide peroxide

Abstract Purpose To investigate and compare the translucency color stability of a newly introduced polymer‐infiltrated ceramic network (PICN) material (Crystal Ultra) to those clinically well‐established restorative materials. Materials Methods A total 80 specimens measuring (12 × 14 1 mm ± 0.05 mm) were prepared from five CAD/CAM (IPS e.max (IPS), Lava Ultimate (LU), Cerasmart (CS), Vita Enamic (VE), Crystal Ultra (CU)) high (HT) blocks in A2 or equivalent shades. Specimens randomly allocated into two groups (A B) (n = 8), subjected 5,000 thermal‐cycles (TC). This was followed by one‐week immersion group coffee (staining) solution B distilled water. Following immersion, both further TC. spectrophotometer used measure parameter (TP) change (ΔE 00 ) samples using CIELAB coordinates at baseline, after TC, following Color evaluated CIEDE2000 formula. Data analyzed non‐parametric tests (α 0.05). Results The TP values materials ranged 18.0‐22.0. initial changes significant for VE ( p 0.012). Coffee TC significantly impacted PICN (VE CU) compared glass‐ ceramics resin nanoceramic (CS LU) comparison between different intervals showed difference < 0.01). perceptible except which demonstrated acceptable changes. major noticed immersed coffee; LU CS higher 2.45 2.09, respectively) than CU 1.8). Conclusions low nanoceramics lithium disilicate glass‐ceramic. exhibited better nanoceramics, but when with glass‐ceramic