Artificial teeth

• US 20100035208A1
• Filed: 07/31/2009
• Published: 02/11/2010
• Est. Priority Date: 08/01/2008
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Shofu
• Original Assignee: Kabushiki Kaisha Shofu
• Inventors: Kadobayashi, Yusei
• Granted Patent: US 8,684,736 B2
• Time in Patent Office: Days
• US Class Current: 433/191
• CPC Class Codes: A61C 13/097 characterised by occlusal profiles , i.e. chewing contact surfaces

Abstract

The invention enables to arrange teeth at appropriate positions depending on the oral cavity environment of each patient without requiring advanced techniques or experiments. In artificial molar teeth to be arranged on bases 33, 34 which are mounted in an oral cavity as a dental prosthetic appliance, an occlusal surfaces of the teeth 1, 2, 5, 6 are provided with side grooves 29 to 32 extending toward a buccal side or lingual side, and intersecting portions (tops 29a to 32a) of the side grooves 29 to 32 with the outer circumference of the occlusal surface, and a contact point 35 are formed on a plane parallel to the mesical distal direction. Or the teeth 1, 2, 5, 6 are configured such that the bottom ends of fossae 25, 27 on the occlusal surface and the contact point 35 are formed on a plane parallel to the mesical distal direction. Alternatively, mutually parallel flat frictional contact portions 9 to 12 are provided around cusps 13A, 13B to 16, 17A, 17B to 20 mutually contacting with maxillary molar teeth 1, 2 and mandibular molar teeth 5, 6, respectively.

Claims

1. Artificial molar teeth to be arranged on a base which is mounted in an oral cavity as a dental prosthetic appliance,

wherein an occlusal surface of the teeth is provided with a side groove extending toward a buccal side or lingual side in a state arranged on the base, and

an intersecting portion of the side groove with the outer circumference of the occlusal surface, and a contact point with teeth arranged adjacently in a mesical distal direction are formed on a plane parallel to the mesical distal direction.

4. The artificial molar teeth according to claim 1, wherein the teeth have mutually occluding teeth on the opposed bases, and mutually parallel flat frictional contact portions are provided around the mutually contacting cusps of these teeth, respectively.

6. The artificial molar teeth according to claim 4, wherein in each cusp of the maxillary molar teeth and mandibular molar teeth, the frictional contact portions of a distal buccal side are parallel to each other, and the frictional contact portions of a mesial buccal side are parallel to each other, and the frictional contact portions of ae distal lingual side are parallel to each other, and the frictional contact portions of a mesial lingual side are parallel to each other.

7. The artificial molar teeth according to claim 6, wherein the frictional contact portions of the mesial lingual side of the cusp of the maxillary molar teeth and the frictional contact portions of the distal buccal side of the cusp of the mandibular molar teeth are parallel to each other, the frictional contact portions of the distal buccal side of the cusp of the maxillary molar teeth and the frictional contact portions of the mesial lingual side of the cusp of the mandibular molar teeth are parallel to each other, the frictional contact portions of the distal lingual side of the cusp of the maxillary molar teeth and the frictional contact portions of the mesial buccal side of the cusp of the mandibular molar teeth are parallel to each other, and the frictional contact portions of the mesial buccal side of the cusp of the maxillary molar teeth and the frictional contact portions of the distal lingual side of the cusp of the mandibular molar teeth are parallel to each other.

8. The artificial molar teeth according to claim 1, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

14. The artificial molar teeth according to claim 4, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

16. The artificial molar teeth according to claim 6, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

17. The artificial molar teeth according to claim 7, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

2. Artificial molar teeth having two or more teeth to be arranged adjacently in the mesical distal direction on a base which is mounted in an oral cavity as a dental prosthetic appliance, and a cusp side embrasure being formed at a cusp side from a contact point with the outer circumference thereof,

wherein an occlusal surface of at least one tooth is provided with a side groove extending toward a buccal side or lingual side, and an intersecting portion of the side groove with the outer circumference of the occlusal surface and the contact point are formed on a plane parallel to the mesical distal direction.

9. The artificial molar teeth according to claim 2, wherein the teeth have mutually occluding teeth on the opposed bases, and mutually parallel flat frictional contact portions are provided around the mutually contacting cusps of these teeth, respectively.

12. The artificial molar teeth according to claim 2, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

3. Artificial molar teeth having two or more teeth to be arranged adjacently in the mesical distal direction on a base which is mounted in an oral cavity as a dental prosthetic appliance, and a cusp side embrasure being formed at a cusp side from a contact point with the outer circumference thereof,

wherein at least one tooth is configured such that the bottom end of a fossa on the occlusal surface of the tooth and the contact point are formed on a plane parallel to the mesical distal direction.

10. The artificial molar teeth according to claim 3, wherein the teeth have mutually occluding teeth on the opposed bases, and mutually parallel flat frictional contact portions are provided around the mutually contacting cusps of these teeth, respectively.

13. The artificial molar teeth according to claim 3, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.

5. Artificial molar teeth having maxillary molar teeth and mandibular molar teeth arranged on bases which are mounted on upper and lower jaws of an oral cavity as a dental prosthetic appliance,

wherein mutually parallel flat frictional contact portions are provided around the mutually contacting cusps of the maxillary molar teeth and mandibular molar teeth, respectively.

11. The artificial molar teeth according to claim 5, wherein in each cusp of the maxillary molar teeth and mandibular molar teeth, the frictional contact portions of a distal buccal side are parallel to each other, and the frictional contact portions of a mesial buccal side are parallel to each other, and the frictional contact portions of ae distal lingual side are parallel to each other, and the frictional contact portions of a mesial lingual side are parallel to each other.

15. The artificial molar teeth according to claim 5, wherein the cusp tops of adjacent teeth are disposed so as to coincide with each other.