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US 8,162,661 B2Granted
Ultrasonic crown and bridge remover
OwnerZbigniew Ponainventor
Life of this patent
Estimating the term…
Abstract
A dental tool having a pair of releasably and pivotably connected opposing jaw members. A biasing mechanism connected to at least one of the jaw members biases the jaw members toward a proximate rest position. A separating mechanism is connected to at least one jaw member for separating the jaw members. An ultrasonic vibrator is connected to the jaw members for vibrating them. A fastening device may be used to connect the pair of opposing jaw members.
Claims12
An ultrasonic, vibrating dental tool for removing a dental crown, comprising:
- a handle having a longitudinal axis and a neck portion extending longitudinally therefrom having the same longitudinal axis;
- a first jaw member releasably connected to the neck portion having a substantially L-shape and having a rear leg portion extending longitudinally from the neck portion, said rear leg portion is slidably received within the neck portion for selectively positioning of the first jaw member for engaging a dental crown;
- a second jaw member releasably connected to the neck portion having a substantially C-shape that is pivotably connected at a pivot point to the neck portion substantially perpendicular to the longitudinal axis of the neck portion and rear leg portion of the first jaw member, and having an extended rear leg portion extending rearward substantially parallel to the longitudinal axis of the neck portion when the jaw members are in a substantially closed position;
- a biasing member connected to the neck portion and the extended rear leg portion of the second jaw member having a longitudinal axis substantially perpendicular to the longitudinal axis of the neck portion, the biasing member operable to bias the jaw members to the closed position;
- a depressible actuator connected to the biasing member, operable to open the jaw members when compressed downward in the direction toward the neck portion, the actuator operable to pivot the second jaw member about the pivot point;
- at least one internal pivot point in the neck portion to selectively secure the first and second jaw members at a predetermined angled position;
- the first and second jaw members being substantially parallel to each other, each jaw member having a front wedge portion for engaging the dental crown, the front wedge portion being operable to engage a crown therebetween, the end of each front wedge portion having an angled outer surface to facilitate removal of the crown;
- and
- a vibrator, located within the handle, and operable to vibrate the jaw members.
6 more elements
Dependencies are inferred from the claim text.