Dentures and false teeth
First Claim
Patent Images
1. A denture comprising:
- a denture plate and at least one false tooth affixed to the denture plate, the at least one false tooth corresponding to at least one of an upper second premolar, an upper first molar, a lower second premolar or a lower first molar, wherein the following conditions are satisfied when the denture is implanted in a patient;
(a) an imaginary plane passing through supporting cuspals of upper second premolars and supporting cuspals of upper first molars is parallel, or substantially parallel, to an occlusal plane, (b) an imaginary plane passing through bases of opposed-tooth contact regions formed on occlusal surfaces of lower second premolars and lower first molars is parallel, or substantially parallel, to the occlusal plane, wherein the opposed-tooth contact regions of the lower second premolars and the lower first molars have substantially concave surfaces and (c) in centric occlusion, the supporting cusps of the upper second premolars and supporting cusps of the upper first molars contact the bases of the respective opposed-tooth contact regions formed on the occlusal surfaces of the lower second premolars and the lower first molars.
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Abstract
Dentures are taught may comprise one or more false teeth that correspond to the upper and lower second premolars and/or first molars. The false tooth or teeth preferably have the following characteristics in relation to the upper and lower second premolars and first molars: (1) an imaginary plane passing through the supporting cuspals of the upper second premolars and the supporting cuspals of the upper first molars may be parallel or substantially parallel to the occlusal plane; (2) an imaginary plane passing through the base of the opposed-teeth contact region formed on the occlusal surface of the lower second premolars and the lower first molars may be parallel or substantially parallel to the occlusal plane; and (3) in centric occlusion, the supporting cusps of the upper second premolars and the supporting cusps of the upper first molars may contact the bases of the respective opposed-teeth contact regions formed on the occlusal surface of the lower second premolars and the lower first molars. Dentures are also taught that comprise a denture plate and a plurality of false teeth corresponding to lower first premolar, second premolar, first molar, and/or second molar, wherein the shapes of the opposed-tooth contact regions formed on the occlusal surfaces of the second premolar and the lower first molar have the following angular conditions:
(a) sagittal incisal guide angle≧sagittal condylar guide angle and
(b) lateral incisal guide angle>sagittal condylar guide angle.
18 Citations
36 Claims
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1. A denture comprising:
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a denture plate and at least one false tooth affixed to the denture plate, the at least one false tooth corresponding to at least one of an upper second premolar, an upper first molar, a lower second premolar or a lower first molar, wherein the following conditions are satisfied when the denture is implanted in a patient;
(a) an imaginary plane passing through supporting cuspals of upper second premolars and supporting cuspals of upper first molars is parallel, or substantially parallel, to an occlusal plane, (b) an imaginary plane passing through bases of opposed-tooth contact regions formed on occlusal surfaces of lower second premolars and lower first molars is parallel, or substantially parallel, to the occlusal plane, wherein the opposed-tooth contact regions of the lower second premolars and the lower first molars have substantially concave surfaces and (c) in centric occlusion, the supporting cusps of the upper second premolars and supporting cusps of the upper first molars contact the bases of the respective opposed-tooth contact regions formed on the occlusal surfaces of the lower second premolars and the lower first molars. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
(d) an imaginary plane passing through a vertex of the opposed-tooth contact region formed on the occlusal surface of the lower second premolars and the lower first molars is parallel, or substantially parallel, to the occlusal plane.
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3. A denture as in claim 1, wherein the following additional condition is satisfied when the denture is implanted in a patient:
(e) the supporting cusps of the upper second premolars and the supporting cusps of the upper first molars make simultaneous, or substantially simultaneous, contact in the opposed-tooth contact regions of the false tooth or teeth corresponding to the occlusal surface of the lower second premolars and the lower first molars.
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4. A denture as in claim 1, wherein the opposed-tooth contact region formed on the occlusal surface of the false tooth or teeth of the denture further satisfies the following conditions when the denture is implanted in a patient:
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(i) sagittal incisa guide angle≧
sagittal condylar guide angle and(ii) lateral incisal guide angle>
sagittal condylar guide angle.
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5. A denture as in claim 1, wherein the opposed-tooth contact region formed on the occlusal surface of the false tooth or teeth is smooth-surfaced.
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6. A denture as in claim 1, wherein the denture comprises at least two false teeth corresponding to an upper first premolar and an upper second molar and wherein the following additional conditions are satisfied when the denture is implanted in a patient:
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(a) the occlusal surface of the at least one false tooth is parallel, or substantially parallel, to the occlusal plane and (b) an imaginary plane passing through the supporting cuspal or cuspals of the upper first premolar and the upper second molar is parallel, or substantially parallel, to the occlusal plane.
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7. A denture as in claim 1, comprising false teeth corresponding to at least the upper and lower second premolars and the first molars, wherein:
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the upper second premolars and first molars have an identical, or substantially identical, hardness, the lower second premolars and first molars have an identical, or substantially identical, hardness, and the lower second premolars and first molars have a hardness equal to or less than the hardness of the upper second premolars and first molars.
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8. A denture according to claim 7, comprising false teeth corresponding to the upper and lower first premolars and second molars, wherein:
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the upper second premolars and first molars have a hardness equal to or greater than the hardness of the upper first premolar and the second molar and the lower second premolars and first molars have a hardness equal to or greater than the hardness of the lower first premolars and second molars.
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9. A denture of claim 1, wherein the at least one false tooth comprises an exterior occlusal surface layer and an interior material supporting the exterior occlusal surface layer, wherein the interior material comprises at least a portion having a wear resistance and/or hardness greater than the wear resistance and/or hardness of the exterior occlusal surface layer, wherein the exterior occlusal surface layer comprises polyalkyl (meth)acrylate as a primary ingredient and the Vickers hardness of the exterior oclusal surface layer is between about 15 to 60 and wherein the Vickers hardness of at least a portion of the interior material is between about 25 to 200.
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10. A denture as in claim 1, wherein the denture comprises at least two false teeth corresponding to an upper first premolar and an upper second molar and wherein the following additional conditions are satisfied when the denture is implanted in a patient:
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(d) the occlusal surface of the at least one false tooth is parallel, or substantially parallel, to the occlusal plane, (e) an imaginary plane passing through the supporting cuspal or cuspals of the upper first premolar and the upper second molar is parallel, or substantially parallel, to the occlusal plane, (f) an imaginary plane passing through a vertex of the opposed-tooth contact region formed on the occlusal surface of the lower second premolars and the lower first molars is parallel, or substantially parallel, to the occlusal plane and (g) the supporting cusps of the upper second premolars and the supporting cusps of the upper first molars make simultaneous, or substantially simultaneous, contact in the opposed-tooth contact regions of the false tooth or teeth corresponding to the occlusal surface of the lower second premolars and the lower first molars wherein the opposed-tooth contact region formed on the occlusal surface of the false tooth or teeth of the denture further satisfies the following conditions when implanted in a patient;
(i) sagittal incisal guide angle≧
sagittal condylar guide angle and(ii) lateral incisal guide angle>
sagittal condylar guide anglewherein the opposed-tooth contact region formed on the occlusal surface of the false tooth or teeth is smooth-surfaced.
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11. A denture as in claim 10, comprising false teeth corresponding to at least the upper and lower second premolars and the first molars, wherein:
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the upper second premolars and first molars have an identical, or substantially identical, hardness, the lower second premolars and first molars have an identical, or substantially identical, hardness, and the lower second premolars and first molars have a hardness equal to or less than the hardness of the upper second premolars and first molars.
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12. A denture according to claim 11, further comprising false teeth corresponding to second molars, wherein:
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the upper second premolars and first molars have a hardness equal to or greater than the hardness of the upper first premolar and the second molar and the lower second premolars and first molars have a hardness equal to or greater than the hardness of the lower first premolars and second molars.
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13. A denture as in claim 12, wherein when the denture is implanted in a patent, the following arrangement is provided in centric occlusion:
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supporting cuspals of the first premolars and the second molars are arranged at an identical height and supporting cuspals of the second premolars and the first molars are arranged at an identical height and located below the supporting cuspals of the first premolars and the second molars.
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14. A denture as in claim 13, wherein a line connecting the supporting cuspals of the first premolars and the second molars and a line connecting the supporting cuspals of the second premolars and the first molars are parallel, or substantially parallel, to the occlusal plane.
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15. A denture of claim 14, wherein the at least one false tooth comprises an exterior occlusal surface layer and an interior material supporting the exterior occlusal surface layer, wherein the interior material comprises at least a portion having a wear resistance and/or hardness greater than the wear resistance and/or hardness of the exterior occlusal surface layer, wherein the exterior occlusal surface layer comprises polyalkyl (meth)acrylate as a primary ingredient and the Vickers hardness of the exterior occlusal surface layer is between about 15 to 60 and wherein the Vickers hardness of at least a portion of the interior material is between about 25 to 200.
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16. A denture comprising a denture plate and a plurality of false teeth affixed to the denture plate corresponding to lower second premolars and/or lower first molars, wherein the following conditions are satisfied when the denture is implanted in a patient:
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(a) a first imaginary plane passing through bases of opposed-tooth contact regions formed on occlusal surfaces of the lower second premolars and the lower first molars is parallel, or substantially parallel, to the occlusal plane, (b) a second imaginary plane passing through distal edges of the opposed-tooth contact regions formed on the occlusal surfaces of the lower second premolars and the lower first molars is parallel, or substantially parallel, to the occlusal plane, wherein the opposed-tooth contact regions of the lower second premolars and the lower first molars have substantially concave surfaces. - View Dependent Claims (17)
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18. A false tooth adapted to be affixed to a denture, wherein the false tooth corresponds to a lower second premolar and/or a lower first molar, wherein the shape of a tooth contact region formed on an occlusal surface of the false tooth satisfies the following conditions:
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(a) sagittal incisal guide angle≧
sagittal condylar guide angle and(b) lateral incisal guide angle>
sagittal condylar guide angle.- View Dependent Claims (19, 20)
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21. A denture comprising a denture plate and at least one false tooth affixed to the denture plate corresponding to lower first premolars, second premolars, first molars, and/or second molars, wherein bases of occlusal surfaces of the first premolars and second molars are parallel, or substantially parallel to an occlusal plane and bases of occlusal surfaces of the second premolars and first molars are parallel, or substantially parallel to the occlusal plane and located below the bases of the occlusal surfaces of the first premolars and second molars.
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22. A denture comprising a denture plate and at least one false tooth affixed to the denture plate corresponding to upper first premolars, second premolars, first molars, and/or second molars, wherein when the denture is implanted in a patent, the following arrangement is provided in centric occlusion:
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supporting cuspals of the first premolars and the second molars are arranged at an identical height and supporting cuspals of the second premolars and the first molars are arranged at an identical height and located below the supporting cuspals of the first premolars and the second molars. - View Dependent Claims (23, 24)
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25. A denture comprising a denture plate and a plurality. of false teeth corresponding to a lower first premolar, second premolar, first molar, and/or second molar, wherein the shapes of opposed-tooth contact regions formed on occlusal surfaces of the second premolar and the lower first molar satisfy the following conditions when implanted in a patient:
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(a) sagittal incisal guide angle≧
sagittal condylar guide angle and(b) lateral incisal guide angle>
sagittal condylar guide angle and the shapes of opposed-tooth contact regions on occlusal surfaces of the first premolar and the second molar satisfy the following conditions when implanted in a patient;
(a) sagittal incisal guide angle≧
sagittal condylar guide angle and(b) lateral incisal guide angle>
sagittal condylar guide angle or the shapes are sloped more gently than a shape satisfying the above conditions.- View Dependent Claims (26)
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27. In combination,
a first false tooth corresponding to an upper second premolar, the first false tooth having lingual cuspals that provide a sole portion for opposed contact, wherein the lingual cuspals are partial spheres, a second false tooth corresponding to an upper first molar, the first false tooth having lingual cuspals that provide a sole portion for opposed contact, wherein the lingual cuspals are partial spheres, wherein the first false tooth and the second false tooth are connected.
- 28. A false tooth comprising an exterior occlusal surface layer and an interior material supporting the exterior occlusal surface layer, wherein the interior material comprises at least a portion having a wear resistance and/or hardness greater than the wear resistance and/or hardness of the exterior occlusal surface layer.
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35. A false tooth adapted to be affixed to a denture, wherein the false tooth corresponds to a lower second premolar and/or a lower first molar and an opposed-Tooth contact region formed on an occiusal surface of the false tooth has a substantially smooth, concave surface lacking bumps, wherein the false tooth comprises an exterior occlusal surface layer and an interior material supporting the exterior occlusal surface layer, wherein the interior material comprises at least a portion having a wear resistance and/or hardness greater than the wear resistance and/or hardness of the exterior occlusal surface layer, wherein the exterior occlusal surface layer comprises polyalkyl (math)acrylate as a primary ingredient and the Vickers hardness of the exterior occlusal surface layer is between about 15 to 60 and wherein the Vickers hardness of at least a portion of the interior material is between about 25 to 200.
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36. A denture comprising a denture plate and at least one false tooth affixed to the denture plate corresponding to lower first premolars and/or second molars, wherein an occlusal surface of the at least one false tooth is a substantially flat surface and parallel, or substantially parallel, to an occlusal plane, wherein the at least one false tooth comprises an exterior occlusal surface layer and an interior material supporting the exterior occlusal surface layer, wherein the interior material comprises at least a portion having a wear resistance and/or hardness greater than the wear resistance and/or hardness of the exterior occlusal surface layer, wherein the exterior occlusal surface layer comprises polyalkyl (meth)acrylate as a primary ingredient and the Vickers hardness of the exterior occlusal surface layer is between about 15 to 60 arid wherein the Vickers hardness of at least a portion of the interior maternal is between about 25 to 200.
Specification
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Current AssigneeYamaguchi Seiken Kogyo KK (Arakawa Chemical Industries Limited)
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Original AssigneeYamaguchi Seiken Kogyo KK (Arakawa Chemical Industries Limited)
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InventorsNakamura, Shoji, Tamagawa, Hideyasu
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Primary Examiner(s)O'Connor, Cary E.
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Application NumberUS09/711,853Time in Patent Office799 DaysField of Search433/196, 433/197, 433/202.1, 433/212.1US Class Current433/197CPC Class CodesA61C 13/09 Composite teeth, e.g. front...A61C 13/097 characterised by occlusal p...
