BR202017016202U2 - Orthodontic circuit breaker with long screw. - Google Patents

Abstract

longitudinal screw orthodontic circuit breaker the longitudinal screw orthodontic circuit breaker refers to a quick orthodontic hygienic expander made entirely of stainless steel, which presents the positioning of the screw in the sagittal direction, differing for this reason from other expanders that comply the same purpose. This peculiar position of its long axis favors it being able to be adjusted to narrow palates in a privileged manner, that is, it is installed higher in the palatal vault, closer to the center of resistance of the posterior teeth, and occupies less space for the tongue. , providing more comfort and maintaining the advantage of large transverse opening capacity.

Description

DESCRIPTIVE REPORT

ORTHODONTIC BREAKER WITH LONGITUDINAL SCREW.

The breakers are used in the dental specialty called Orthodontics with the main objectives of expanding the upper dental arch, uncrossing posterior bites and making the maxillomandibular basal bones compatible in the transversal direction. Its use is indicated in childhood, in young children or in adults with surgical assistance.

A wide variety of designs of these expanders are available on the market, the most well known and widely used are the Haas and Hyrax types. The first consists of thick stainless steel wires, acrylic, an expander screw, rings and the second made entirely of stainless steel with folding rods that are adapted to the patient's arch and rings in which they are welded. In both, the screws are positioned perpendicular to the sagittal direction, providing lateral expansion of the two hemiarches.

Candidate candidates for this type of intervention usually have a narrow jaw and deep palate, which often leads to the need to perform more than one expansion to achieve compatibility between the arches. One of the factors that contribute to this is the discrepancy between the need for expansion and the size of the screw that can be accommodated in the narrow palatal vault.

The device model shown here differs from others on the market and has a design capable of being inserted in extremely narrow palates, with the ability to expand the jaw by a large extent with a single screw (Figures 1, 2, 3 and 4).

It consists of four rods of stainless steel wire, 1.45 mm in diameter, foldable and adaptable to the posterior support teeth (Figure 1 a), which are welded to the first premolar and first molar rings, together with the reinforcement wires, in the same way as the other existing hygienic circuit breakers.

Its screw has a hexagonal head, to receive a griffin key, or another type turned to the anterior (Figure 2 a), differing from the others because it is positioned sagittally on the palate and not transversely, with its long axis aligned with the palatal suture (Figure 2). The thread is left half of the head (Figure 2 b) and right for the rest of its length (Figure 2 c). Two cursors, one juxtaposed to the head of the screw and the other positioned at the other end (Figure 2 d) are connected to the rods adaptable to the teeth through

2/2 ολ two steel bars per side (Figure 2 e), fixed with pins at both ends (Figure 2 f), pivoting joints as hinges. Each of the bars joins each cursor to the center of the element containing the rods (Figure 1 b) to adapt the appliance to the teeth.

When the device is completely closed, before its activation, all components (folding rods and screw) are juxtaposed with each other and as the screw is activated, turning it clockwise with the appropriate key, the cursors positioned at the ends, they move towards each other, causing the lateral components, elements that are foldable and adaptable to the arch, to distance themselves from each other and from the central axis, naturally transmitting the expansion force to the teeth (Figure 3).

Adjustment to the patient's model, containing the rings on the first premolars and first molars, is carried out in the usual way for other existing circuit breakers. The anterior arms are adapted to be welded to the rings of the first premolars, the posterior ones to the rings of the first molars, together with the reinforcement bar juxtaposed and that contours the posterior teeth.

The key for driving the screw in the mouth can be hexagonal, in griffin or other type, for fitting and transmitting torque to the screw head. It has an angle of about 45 degrees between the axis of the active tip and the cable (Figure 4 a), to allow the activation of the expander in its place of use, the patient's mouth.

Claims (1)

ORTHODONTIC BREAKER WITH LONGITUDINAL SCREW, 1 made of rigid, hygienic, rigid stainless steel to be adapted and welded to rings in order to expand the upper hemiarches. Characterized by presenting the long axis of its screw arranged parallel to the sagittal palatal suture, differently from the other existing circuit breakers. Its activation can be done by a key that accompanies it, with a hexagon head, griffin or other type. The screw on the device has two types of thread, left from the head to half its length and right from the rest, which allows its sagittal disposition. The threads thus arranged move the two cursors at the ends, in a direction so as to approach each other as the screw is turned or turned clockwise. During this reciprocal movement, the side parts of the circuit breaker, which contains the rigid arms adaptable to the maxillary posterior teeth, move away from the midline, transmitting the necessary force for the expansion of the arches. This system allows the appliance to have a large opening capacity, even if it has a small width, or a transverse dimension when closed, which is advantageous for its adaptation on the palate, allowing the screw to be positioned in the center of resistance of the posterior teeth, in addition to occupying less vault space. In addition, it still allows a large extent of disjunction to be achieved with the use of a single screw, even in cases of very narrow palates. It can also be adapted for support in mini-implants instead of teeth through rings and even with mixed support. A special wrench for activating the device, with hexagonal active tip, griffin or other type, with an angle of around 45 degrees between the active tip and the cable, facilitates the adaptation and activation of the screw in the mouth.