Patents Assigned to Martin A. Hass
  • Artificial teeth that minimize stresses on denture supporting tissue
    Patent number: 4194288
    Abstract: Artificial posterior teeth of non-interlocking construction having flat surfaces parallel to the plane of lateral tooth movement that form a major portion of the occlusal surfaces. Since the teeth can freely slide laterally on one another, side stresses that would tend to shift the dentures are avoided, even though a cross-bite setup is used. Each tooth has a laterally extending, food positioning and holding groove and one or more spillways thereon that permit fluids and comminuted food to escape, thereby reducing hydraulic pressure.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: March 25, 1980
    Assignee: Martin A. Hass
    Inventor: Martin A. Hass