Artificial teeth, method of determining grinding portion, and method of manufacturing denture

摘要

An artificial tooth where an occlusal surface is formed by grinding has a reference point that represents a position and an angle of the artificial tooth when an occlusal surface of the artificial tooth is obtained by an occlusal-surface form measuring apparatus. The reference point is a convexed spherical surface or a concaved spherical surface arranged on the occlusal-surface. The spherical surface has three or more reference points. The convexed spherical surface is fit to the concaved spherical surface when the maxillary artificial tooth and mandibular artificial tooth are occluded. The occluding portion of the artificial tooth has a grinding portion.

主权项

1. A method for determining a grinding portion of pre-grinding dentures of maxillomandibular artificial teeth, the method comprising:
providing the pre-grinding dentures of maxillomandibular artificial teeth which have a grinding portion to be formed into an occlusal surface by grinding, and three or more reference points disposed on the grinding portion; placing the pre-grinding dentures of maxillomandibular artificial teeth in a synthetic resin; providing an articulator having an upper arch and a lower arch, each of the upper arch and the lower arch having three or more reference points; reading the reference points of the pre-grinding dentures of maxillomandibular artificial teeth placed in the synthetic resin; producing a three dimensional data of the pre-grinding dentures of maxillomandibular artificial teeth in a computer based on the read reference points of the pre-grinding dentures of maxillomandibular artificial teeth; reading the reference points of the articulator; producing a three dimensional data of the articulator in the computer based on the read reference points of the articulator; calculating in the computer a position of the pre-grinding dentures of maxillomandibular artificial teeth mounted on the articulator so as to reproduce an occlusion state in the computer; and determining the grinding portion at a location where three dimensional data of the pre-grinding dentures of maxillomandibular artificial teeth overlap with each other.