Stress Distribution and Fracture Resistance of repairing Cracked Tooth with Fiber‐reinforced Composites and Onlay

Abstract The purpose of this study was to explore the effects of fibre‐reinforced composites and onlay restorations on the fracture resistance of the cracked teeth. The experiments were grouped as follows: intact teeth, cracked teeth, crown; onlay; annular ribbond + onlay, laminated ribbond + onlay and fibre post + onlay; annular ribbond + crown, laminated ribbond + crown and fibre post + crown. The maximal Von Mises stress of dentin, the maximal Von Mises stress at the crack, the fracture resistance and fracture pattern under static loading were analysed by single‐factor analysis of variance (ANOVA) and post‐test by LSD. The annular ribbond + crown had a significant difference in fracture resistance than the crown ( P < 0.05). The annular ribbond + onlay had more favourable fractures than crown in fracture pattern, and there were significant differences ( P < 0.05). Compared with crown restoration, fibre‐reinforced composites and onlay can improve the fracture resistance of the cracked teeth.