Kabushikikaisha Shofu

Hirokazu Satoh

Kunihiro Fujii

Noriyuki Negoro

Toshiyuki Nakatsuka

Nobutaka Watanabe

Katsushi Tamaki

Coupled artificial teeth

To provide a pair of maxillary and mandibular coupled artificial tooth sets applicable to alveolar ridge shapes of an unspecified large number of edentulous patients and having all the parts of 14 teeth coupled into an ideal arch shape and in an ideal maxillomandibular occlusal contact relationship. The present invention provides a pair of maxillary and mandibular coupled artificial tooth sets clearly defining an arrangement region of all parts at the time of arrangement in virtual three-dimensional coordinates, a contact relationship between maxillary and mandibular artificial teeth, and a harmonizing contact/gliding relationship at the time of movement on a mean-value articulator. This enables provision of a high-quality complete denture in which an occlusal relationship required for a complete denture can be established in a short time regardless of a skill of a technician and a difference in shape of an alveolar ridge of an edentulous patient.

Artificial teeth set including mandibular coupled artificial teeth having an arch shape and maxillary coupled artificial teeth having an arch shape

Artificial teeth of upper and lower jaws, allowing easy operation by clarifying the three-dimensional positional relation of cusp tips and pits to contact with each other in occlusion. Each pair of artificial teeth may include cusp tips and pits, and the positional relation of the cusp tips and pits are set appropriately.

Artificial tooth

It is intended to provide artificial teeth designed to easily enable bilateral balanced occlusion with less grinding adjustment. According to the present invention, angles formed by occlusal facets of the artificial teeth with an occlusal plane are suitably set. An artificial tooth for maxillary central incisor, for example, has a protrusive facet and a retrusive facet on an incisal edge thereof. Of angles formed by the protrusive facet with the occlusal plane, the angle in cross section along a sagittal plane is 22.0&#xb0; to 25.5&#xb0;, and the angle in cross section along a coronal plane is 1.5&#xb0; to 6.5&#xb0;. Of angles formed by the retrusive facet with the occlusal plane, the angle in cross section along the sagittal plane is 20.5&#xb0; to 23.0&#xb0;, and the angle in cross section along the coronal plane is 1.5&#xb0; to 6.5&#xb0;.

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Kyoto, Japan

Hirokazu Satoh