Dental prosthesis

Details

Inventors: Fischer, Artur; Weber, H.; Rubeling, Gunter;
Assignee: fischerwerke Artur Fischer GmbH & Co. KG (Tumlingen/Waldachtal, DE)
Primary Examiner: Stone; Cary E.
Assistant Examiner:
Attorney, Agent or Firm: Striker; Michael J.

A dental prosthesis comprises an element fixed in a mouth, a removable dental porsthesis component placed on the element, and a removable connection of the dental prosthesis component with the element and including vertical groove formed in an adjacent surface in each of the element and the component, the grooves being located immediately opposite to one another and open into one another, the connection further including a resilient friction element engaging in the grooves.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide a dental prosthesis having a frictional connection, in which the connection takes as little space as possible and is economical to produce.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a dental prosthesis in which a vertical groove is formed in adjacent surfaces of an element fixed in a mouth and a removable component fitting over the element fixed in the mouth so that the grooves are located directly opposite to one another, and the resilient friction element engages in both grooves.
In accordance with the present invention the grooves in which the resilient friction element is inserted are produced in the outer surface of the primary element which is fixed in the mouth such as a telescope crown or internal telescope, and on the inner surface of the removable components such as a removable crown or external telescope.
The friction element is pressed into the grooves so that the friction between the friction element and the inner surface of the groove is sufficient to fix the dental prosthesis securely in the mouth.
However, the friction in the grooves is not too great for removal of the dental prosthesis.
The friction element which is used in accordance with the present invention is preferably a profile pin composed of polyamide and engaging the undercuts in the grooves with its x-shaped profile.
The cross-section of such profile can be for example curved, swallow-tailed or triangular.
In accordance with another feature of the present invention the grooves which are located opposite to one another do not have the same cross-sectional shape.
For example, one groove can be trapezoidal, while the other groove in the opposite surface can be semi-circular.
The semi-circular groove in this case can be provided on the outer surface of the inner telescope crown, while the trapezoidal groove can be provided on the inner surface of the outer removable crown

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