Pulp perforation type wedge-shaped defective fibrous band prosthesis for maxillary premolars and preparation method

The invention discloses a pulp perforation type wedge-shaped defective fibrous band prosthesis for maxillary premolars. The pulp perforation type wedge-shaped defective fibrous band prosthesis for themaxillary premolars comprises fibrous bands and a wedge-shaped composite resin restoration, wherein the number of the fibrous bands is 1 to 2, the lengths of the fibrous bands are smaller than 6.0 to7.5mm of the lengths of teeth, the widths of the fibrous bands are 1.0 to 2.0mm, and the thicknesses of the fibrous bands are 1.0 to 1.5mm. The depth of the wedge-shaped composite resin restoration from the tip to the bottom end is one second to two thirds of the dental diameter of tooth cervix, the width of the wedge-shaped composite resin restoration is the distance between the mesio-adjacent surface and the axiodisto-adjacent surface of the maxillary premolars, and thickness of the wedge-shaped composite resin restoration is 3.0 to 5.0mm; the wedge-shaped composite resin restoration wrapsand winds the one third-mid