Patent ID: 8696355
Filing Date: 2014-04-15
Classification: A61C

Abstract:
1. Artificial molar teeth having maxillary molar teeth and mandibular molar teeth arranged in plates to be fitted to the upper jaw and lower jaw, respectively, in an oral cavity as a dental prosthetic appliance, wherein the maxillary molar teeth and the mandibular molar teeth have occlusal facets mutually contacting with each other in each cusp, wherein each of the maxillary molar teeth has an occlusal facet that defines an intersection angle β formed by a first line that is normal to the occlusal facet of the maxillary molar tooth and an occlusal plane, wherein each of the mandibular molar teeth has an occlusal facet that defines an intersection angle α formed by a second line that is normal to the occlusal facet of the mandibular molar tooth and the occlusal plane, wherein, for each of the maxillary molar teeth, the first line that is normal to the occlusal facet is a normal line relative to a contact plane containing a crossing point of a central line between a mesial side outer end position and a distal side outer end position in the mesiodistal direction, and a central line between a cusp side outer end position and a cervical side outer end position in the cusp-cervical direction of the maxillary molar tooth, wherein, for each of the mandibular molar teeth, the second line that is normal to the occlusal facet is a normal line relative to a contact plane containing a crossing point of a central line between a mesial side outer end position and a distal side outer end position in the mesiodistal direction, and a central line between a cusp side outer end position and a cervical side outer end position in the cusp-cervical direction of the mandibular molar tooth, wherein the occlusal plane is a plane including a middle point of a line between a pair of anterior teeth cutting end corners of the lower jaw, and distal buccal side cusp tops of a pair of mandibular second molar teeth, wherein the intersection angle α of the mandibular molar teeth is larger than the intersection angle β of the maxillary molar teeth, wherein, among the maxillary molar teeth, the intersection angle β becomes smaller toward the mesial side, and wherein, among the mandibular molar teeth, the intersection angle α becomes smaller toward the mesial side.