Device for monitoring and correcting the convergence angle of the walls of prepared teeth

Abstract

The present device pertains to the field of medicine, and more particularly to orthopaedic dentistry, and can be used for ensuring precision in the tooth preparation step during the installation of prostheses. The claimed device comprises a 1:5 red band micromotor or turbine handpiece, a coupling, an abrasive tool, two levers, a template, a pivoting assembly, a flange, a bushing, a bracket, and a shaft, wherein the flange is secured in the template, which is printed on a 3D printer, and the pivoting assembly is comprised of linear slide bearings and a guide shaft, wherein the shaft and the bracket are parallel to one another, and the handpiece is fastened by the coupling such that the axis of the abrasive tool is parallel to the axis of the shaft. The device provides a broader range of use in the given field of orthopaedic dentistry than the existing prior art.

Description

[0001] IPC A 61 C 3 / 025

[0002] A device for monitoring and adjusting the angle of convergence of the walls of prepared teeth

[0003] Egeletsh tkterdsch kabyrgalarynyts convergence buryshyn bakylauga zhene tuzetuge arnalgan kurylgy

[0004] The device belongs to the field of medicine, namely to orthopedic dentistry, and is used in prosthetics to ensure the accuracy of the dental preparation stage.

[0005] A device is known comprising a base, a work table secured thereto, a stand with elements for fixing the tools of a drilling and milling device, and a vertical movement guide device, provided with a movable stand with assemblies for fixing analytical and graphite rods secured to its brackets with measuring means: the value of the angle of inclination of a support tooth in the form of a coaxially mounted degree scale of a protractor, a rod with a horizontal axis of rotation, and an index arrow. And the vertical movement guide device is rigidly connected to the table platform, including a cross coupling with a freely rotating base disk, wherein the table body is connected to the platform by a screw yoke consisting of a screw and a nut, providing vertical movement of the table platform (RU Patent 2080099, A 61 C 19 / 04, published 27.10.2004)

[0006] The disadvantage of this solution is the difficult manufacturing process of the device.

[0007] A device is also known that contains a base with a hinged table for a jaw model, a vertical stand with a horizontal rod movable relative to it and a movable graphic marker located perpendicular to the plane of the base, characterized in that the graphic marker is provided with a retainer for the line of the gingival margin, installed with the possibility of horizontal movement relative to the rod, wherein the top of the retainer is located on a perpendicular lowered from the top of the graphic marker to the base of the device, and the horizontal rod is provided with a degree graduation (RU Patent 2199971, A 61 C 5 / 10, 13 / 38; published 27.10.2004).

[0008] The disadvantages of this patent include high labor costs when using the patented device, leading to increased costs for the services provided.

[0009] The closest in technical essence and achieved result to the claimed invention is a device for monitoring and correcting the angle of convergence of the walls of the teeth being prepared, which contains a turbine tip, a unit for fixing it on the supporting teeth, made in the form of a bite plate with perforation, pivotally connected by means of a depth gauge pin with graduation of two levers, the free ends of which are connected respectively to the bite plate and a coupling connected to the turbine tip, while it is equipped with a unit: changing the angle of inclination of the turbine tip, made in the form of a protractor in the form of a half-disk with a scale graduation, one division of which corresponds to the angle of rotation of the lever connected to the turbine tip by 2.5 °, and the latter is made with a shaped groove for the half-disk and is mounted on the hinge sleeve with the possibility of rotation and rigid fixation by means of screws, while the scale on the half-disk is made, for example,in the form of notches on its two flat surfaces with a transition to the end circular surface, and the groove for the half disk is made with an arrow in the central part, interacting with the scale of the end surface of the half disk (RU Patent 2123817, A 61 C 3 / 025, published on 27.10.2004).

[0010] The disadvantages of this device include its unreliable design, low measurement accuracy, and inconvenience. The objective of the proposed invention is to develop a device for monitoring and adjusting the convergence angle of the walls of prepared teeth with an expanded range of applications in dental preparation.

[0011] The problem is solved by a device comprising a tip, a coupling, an abrasive tool, two levers, a template, a hinge assembly, a flange, a bushing, a bracket, and a shaft. The flange is secured to a template, which is 3D printed. The hinge assembly is made of precision linear bearings and a guide shaft (or any known method). The shaft and bracket are parallel to each other and are secured with a coupling such that the axis of the abrasive tool is parallel to the shaft axis. The tip is a 1:5 micromotor with a red stripe (preferred) or a turbine motor.

[0012] Significant differences between the proposed device and the prototype include the additional addition of a tip (the doctor's tip), an abrasive tool, a template, a flange, a sleeve, a bracket, and a shaft. The flange is secured to a template, which is 3D printed. The hinge assembly is made of precision linear bearings and a guide shaft (or any known method). The shaft and bracket are parallel to each other. The tip is secured with a coupling such that the axis of the abrasive tool is parallel to the shaft axis. The tip is preferably a 1:5 micromotor with a red stripe. This improves the reliability of the design, improves its kinematics, and enhances the accuracy of measurement operations.

[0013] The proposed device is shown in Fig.: tip (doctor's) 1, coupling 2, abrasive tool 3, levers 4 and 5, template 6, hinge joint 7, flange 8, sleeve 9, bracket 10, shaft 11.

[0014]

[0015] Fig.

[0016] The device operates as follows: handpiece (doctor's) 1—preferably a 1:5 micromotor with a red stripe—with a loaded abrasive instrument 3, connected to the hinge joint 7 via lever 4, is inserted into coupling 2. The hinge joint 7 and bracket 10 are connected to each other by lever 5. Shafts 11 are fixed to each other in parallel. Bracket 10 is installed through flange 8 in sleeve 9, tightly fixed in template 6. During 3D modeling of the template, the axis of sleeve 9 is made parallel to the axis of the prosthesis insertion path. The axis of sleeve 9 should correspond to the prosthesis insertion path. Template 6 is placed directly into the oral cavity. Parallel movement of handpiece 1 with abrasive instrument 3 in accordance with the axis of the selected prosthesis insertion path during the odontopreparation stage allows for increased accuracy of the prepared tooth surfaces.

Claims

Invention formula 1. A device for monitoring and adjusting the angle of convergence of the walls of teeth being prepared, comprising a tip, a coupling, two levers, a hinged assembly, characterized in that it additionally contains an abrasive instrument, a template, a flange, a sleeve, a bracket, and a shaft.

2. The device according to paragraph 1, characterized in that the flange is fixed in a template, and the latter is printed on a 3D printer.

3. The device according to paragraph 1, characterized in that the hinge assembly is made of precision linear sliding bearings and shaft guides.

4. The device according to item 1, characterized in that the shaft and the bracket are parallel to each other.

5. The device according to paragraph 1, characterized in that the tip is secured with a coupling so that the axis of the abrasive tool is parallel to the axis of the shaft.

6. The device according to item 1, characterized in that the tip is a 1:5 micromotor with a red stripe (preferably) or a turbine.

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