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    • 8. 发明公开
    • Dentures and false teeth
    • Zahnprothesen undkünstlicheZähne
    • EP1099420A2
    • 2001-05-16
    • EP00310035.1
    • 2000-11-10
    • Yamahachi Shizai Kogyo Kabushiki KaishaNakamura, ShojiTamagawa, Hideyasu
    • Nakamura, ShojiTamagawa, Hideyasu
    • A61C13/24
    • A61C13/09A61C13/097
    • 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
    • 教导假牙可以包括对应于上,下第二前磨牙和/或第一磨牙的一个或多个假牙。 假牙或齿优选地具有与上下第二前磨牙和第一磨牙相关的以下特征:(1)通过上第二前磨牙的支撑尖端和上第一磨牙的支撑尖端的假想平面可以是 平行或基本平行于咬合平面; (2)通过形成在下第二前磨牙和下第一磨牙的咬合面上的相对齿接触区域的基部的假想平面可以平行或基本平行于咬合平面; 和(3)以中心闭塞,上第二前磨牙的支撑尖和上第一磨牙的支撑尖可以接触形成在下第二前磨牙的咬合面上的相应的相对齿接触区域的底部, 第一磨牙 还教导了包括义齿板和对应于较低的第一前磨牙,第二前磨牙,第一磨牙和/或第二磨牙的多个假牙的假牙,其中形成在牙齿表面的相对齿接触区域的形状 第二前磨牙和下第一磨牙具有以下角度条件:(a)矢状切面导向角≥矢状髁导向角和(b)侧切面导向角>矢状髁导向角