Evaluation of physical properties of fiber-reinforced composite resin

• Published in: Dental materials Vol. 36; no. 8; pp. 987 - 996
• Main Authors: Suzaki, Naoko, Yamaguchi, Satoshi, Hirose, Nanako, Tanaka, Ryousuke, Takahashi, Yusuke, Imazato, Satoshi, Hayashi, Mikako
• Format: Journal Article
• Language: English
• Published: England Elsevier Inc 01.08.2020; Elsevier BV
• Subjects: Absorption; Anisotropy; Bend tests; CAD/CAM; Composite materials; Composite Resins; Core flow; Dental cement; Dental Materials; Dental Stress Analysis; Dentistry; Fiber composites; Fiber reinforced polymers; Fiber-reinforced; Fibers; Flexural strength; Fracture toughness; Glass; Glass fiber reinforced plastics; Materials Testing; Modulus of rupture in bending; Physical properties; Pliability; Resin composites; Resins; Stress, Mechanical; Surface Properties; Tensile tests; Variance analysis; Water absorption; Water absorption; Resin composites; Fiber-reinforced; Flexural strength; Fracture toughness
• ISSN: 0109-5641; 1879-0097
• DOI: 10.1016/j.dental.2020.04.012

[Display omitted] •Physical properties of a fiber-reinforced CAD/CAM resin disc (TRINIA) were examined.•TRINIA demonstrated distinct anisotropy.•TRINIA can be superior restorative material when specifying direction of mesh layers. This study aimed to investigate physical properties of a fiber-reinforced CAD/CAM resin disc, which included woven layers of multi-directional glass fibers. Fiber orientations of CAD/CAM specimens (TRINIA, SHOFU) were specified as longitudinal (L), longitudinal-rotated (LR), and anti-longitudinal (AL). A fiber-reinforced composite (everX posterior, GC (E)) and a conventional composite (Beauti core flow paste, SHOFU (B)) were also tested. A three-point bending test and a tensile test with notchless prism-shaped specimens were conducted using a universal testing machine (AUTOGRAPH AG-IS, Shimadzu). A water absorption test was also carried out after the specimens were stored in water for 24h or 1 week. Flexural strength and fracture toughness were obtained by conducting a three-point bending test. TRINIA L and LR groups showed significantly high flexural strength (254.2±22.3 and 248.8±16.7MPa, respectively). Those were approximately 2.5 times higher than those in AL, E, and B groups (96.8–98.0MPa) (p<0.05, ANOVA and Tukey HSD test). No significant difference was shown in flexural modulus among the experimental groups. The fracture toughness in L group (9.1±0.4MPa/m1/2) was found to be significantly higher than those in other groups (1.9–3.0MPa/m1/2; p<0.05). TRINIA group demonstrated significantly lower water absorption (4.7±1.9μg/mm3) than did E (16.1±3.1μg/mm3) and B (17.3±3.7μg/mm3) groups (p<0.05). TRINIA demonstrated distinct anisotropy. TRINIA can be used as a superior restorative material when specifying directions of its fiber mesh layers.