Extra-coronal device for dental use

摘要

In a mounting device (11) fitted to the matrix (3) is arranged a friction part (14), in which the slide piece (9) of the patrix (2) can be introduced. Via an activation device provided on the matrix, a retention force acting on the slide piece is adjustable. The activation device comprises a pressure body (17) and a pressure device which activates it. The pressure body with a pressure surface acts on a section of the friction part, which is arranged in a rear area of the mounting device in the insert direction of the matrix. The pressure device consists of an activating screw (16) with a narrowed foot section. A wedge-shaped component complementary to the narrowing of the activating screw is provided as the pressure body.