ARTIFICIAL MOLAR TEETH

• US 20110045441A1
• Filed: 03/01/2010
• Published: 02/24/2011
• Est. Priority Date: 08/21/2009
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Shofu
• Original Assignee: Kabushiki Kaisha Shofu
• Inventors: KADOBAYASHI, Yusei
• Granted Patent: US 8,696,355 B2
• Time in Patent Office: Days
• US Class Current: 433/197
• CPC Class Codes: A61C 13/097 characterised by occlusal profiles , i.e. chewing contact surfaces

Abstract

Maxillary molar teeth and mandibular molar teeth are formed so as to be different in intersection angles (vertical line angles) between vertical lines extending in a vertical direction to occlusal facets and occlusal planes. That is, the maxillary molar teeth and the mandibular molar teeth are formed so as to be different in intersection angles of vertical lines of the protrusive occlusal facet and retrusive occlusal facet respectively. The occlusal facets of at least one of buccal cusps of the maxillary molar teeth and lingual cusps of the mandibular molar teeth are designed so that at least one of the width in the mesiodistal direction and the width in the cuspal-cervical direction is smaller than the occlusal facets of the opposite cusps of the antagonist molar teeth.

Claims

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 in an oral cavity as a dental prosthetic appliance,

wherein the maxillary molar teeth and mandibular molar teeth have occlusal facets mutually contacting with each other in each cusp, and

an intersection angle of a vertical line extending in a vertical direction to the occlusal facet and an occlusal plane of the maxillary molar teeth is set to be different from an intersection angle of a vertical line extending in a vertical direction to the occlusal facet and an occlusal plane of the mandibular molar teeth.

2. The artificial molar teeth of claim 1, wherein the intersection angle of the vertical line of the occlusal facet and the occlusal plane of the mandibular molar teeth is set to be larger the intersection angle of the vertical line of the occlusal facet and the occlusal plane of the maxillary molar teeth.

3. The artificial molar teeth of claim 1, wherein the cusp of each molar tooth has a protrusive occlusal facet and a retrusive occlusal facet.

4. The artificial molar teeth of claims 3, wherein each protrusive occlusal facet is generally parallel to each other, and each retrusive occlusal facet is generally parallel to each other.

5. The artificial molar teeth of claim 4, wherein each occlusal facet is changed in angle gradually toward the mesial side.

6. The artificial molar teeth of claim 1, wherein the occlusal facets are formed in first molar teeth, second molar teeth, and second premolar teeth.

7. The artificial molar teeth of claim 1, wherein the maxillary molar teeth and the mandibular molar teeth have buccal cusps and lingual cusps, respectively.

8. The artificial molar teeth of claim 7, wherein the occlusal facet of at least one of the buccal cusp of the maxillary molar teeth and the lingual cusp of the mandibular molar teeth is smaller than the occlusal facet of the opposite cusp of the antagonist molar teeth, at least in one of the width in the mesiodistal direction and the width in the cuspal-cervical direction.

9. Artificial molar teeth having maxillary molar teeth and mandibular molar teeth arranged in plates to be fitted to the upper jaw and lower jaw in an oral cavity as a dental prosthetic appliance,

wherein the maxillary molar teeth and mandibular molar teeth have protrusive occlusal facets and retrusive occlusal facets in each cusp, and the protrusive occlusal facets of the maxillary molar teeth and the mandibular molar teeth mutually contact with each other, and the retrusive occlusal facets of the maxillary molar teeth and the mandibular molar teeth mutually contact with each other,

an intersection angle of each vertical line extending in a vertical direction to the protrusive occlusal facet and the retrusive occlusal facet of the maxillary molar teeth is set to be different from an intersection angle of each vertical line extending in a vertical direction to the protrusive occlusal facet and the retrusive occlusal facet of the mandibular molar teeth.

10. The artificial molar teeth of claim 9, wherein the intersection angle of each vertical line extending in the vertical direction to the protrusive occlusal facet and the retrusive occlusal facet of the maxillary molar teeth is set to be larger the intersection angle of each vertical line extending in the vertical direction to the protrusive occlusal facet and the retrusive occlusal facet of the mandibular molar teeth.

11. The artificial molar teeth of claims 9, wherein each protrusive occlusal facet is generally parallel to each other, and each retrusive occlusal facet is generally parallel to each other.

12. The artificial molar teeth of claim 11, wherein each occlusal facet is changed in angle gradually toward the mesial side.

13. The artificial molar teeth of claim 9, wherein the occlusal facets are formed in first molar teeth, second molar teeth, and second premolar teeth.

14. The artificial molar teeth of claim 9, wherein the maxillary molar teeth and the mandibular molar teeth have buccal cusps and lingual cusps, respectively.

15. The artificial molar teeth of claim 14, wherein the occlusal facet of at least one of the buccal cusp of the maxillary molar teeth and the lingual cusp of the mandibular molar teeth is smaller than the occlusal facet of the opposite cusp of the antagonist molar teeth, at least in one of the width in the mesiodistal direction and the width in the cuspal-cervical direction.

16. Artificial molar teeth having maxillary molar teeth and mandibular molar teeth arranged in plates to be fitted to the upper jaw and lower jaw in an oral cavity as a dental prosthetic appliance,

wherein each molar tooth has an occlusal facet mutually contacting with each other in each cusp, and

the occlusal facet of at least one of the buccal cusp of the maxillary molar teeth and the lingual cusp of the mandibular molar teeth is smaller than the occlusal facet of the opposite cusp of the antagonist molar teeth, at least in one of the width in the mesiodistal direction and the width in the cuspal-cervical direction.