Guaranteed retention, resistance and dental health condition should be as filling material filling

(1) has retained value of residual Crown, and residual root or Crown big area damage, residues teeth body organization anti-force shaped poor, filling material easy off or cannot do filling treatment who; (2) need with repair body heightened or recovery occlusal who; (3) patient teeth Crown short, or exists thin-walled weak pointed, and patients Heli had big or has molar syndrome who; (4) longitudinal line, and oblique line, and rampage teeth folding; (5) Crown defect of base teeth.