RU220892U1 - DEVICE FOR CARRYING MANDIBULAR ANESTHESIA - Google Patents

Abstract

The utility model relates to dentistry and can be used in specialized medical institutions when providing dental treatment to patients requiring mandibular anesthesia. The device for carrying out mandibular anesthesia consists of two guides, one ends of which are hingedly connected with the possibility of bringing together and spreading, and at the other ends, on one guide there is a guide element in the form of a truncated hollow cylinder for placing an injection syringe in it, on the other guide there is a jaw retainer with a head, wherein the guides have a curved part in the connection area and a straight part. The guide elements and the clamp with the head are removable, and the distance between the axes of the head of the jaw clamp and the tube of the guide element is 125.0 mm. The stated technical result is achieved by the fact that the device allows you to direct the needle of a syringe with a solution of local anesthetic to the area in close proximity to the lower alveolar nerve with high accuracy in a short time, eliminating the inconvenience of the patient by taking into account corrections for the cranial index, facial index, shape of the lower jaw and degree of opening mouth 2 salary f-ly, 1 ill.

Description

Field of technology to which the utility model relates

The utility model relates to medicine, namely to the use of local anesthesia in dentistry and can be used to administer anesthesia in the immediate vicinity of the inferior alveolar nerve.

It should be noted that at the moment in practical dentistry there are about 50 methods of anesthesia of the lower jaw. However, they are difficult to perform, which is due to the individual structural features of the maxillofacial region. In addition, it must be taken into account that the inferior alveolar nerve is distinguished by the fact that it has a passage inside the lower jaw, which is protected by a cortical plate, which further leads to its isolation from external influences. On the one hand, such anatomy is designed to protect the nerve from negative influences that can lead to irreversible damage to the nerve structure, and on the other hand, it reduces the possibility of influencing the nerve by introducing a local anesthetic drug near the bone.

State of the art

A device is known for administering local anesthesia and eliminating its possible complications during surgical intervention in the oral cavity (variants) and a method for administering local anesthesia and eliminating its possible complications during surgical intervention in the oral cavity (see patent RU No. 2702141, IPC A61M 19/ 00, 2019). The device is a three-dimensional stereolithographic model made using individual computer 3D modeling, which includes a guide piece with a straight through channel for the needle and a device rigidly attached to the guide piece for fixing the guide piece in the oral cavity. Moreover, the longitudinal axis of the straight through channel for the needle of the guide part is oriented so as to pass at the distance required for anesthesia from the location of the nerve that gives pain sensitivity to the place that will be operated on. The disadvantages of this device are the lack of:

- possibilities of correction for the anatomical features of the patient;

- the possibility of precise fixation relative to anatomical landmarks;

- possibility of bilateral use (for anesthesia on both sides).

A guide device for dental anesthesia is known, including a guide element with a tube with a through channel for receiving a syringe passing through it at a given point (see US patent No. 11,129946, IPC A61M 19/00, A61M 25/06, A61M 5/32 , published September 28, 2021).

In this case, the guide element contains a stop mechanism designed to stop the advancement of the syringe passing through the guide tube at a given point of the said syringe. The disadvantages of this device are:

- impossibility of correction to the anatomical features of the patient;

- inability to control the use of the volume of solution for injection; the syringe holder body is black, which obscures the view of the used volume of solution.

A device used for implementing the method of mandibular anesthesia is known, containing an arched body with extraoral and intraoral parts, the extraoral part is made in the form of a lamellar arch with an end section with a groove, a fixed ring-shaped grip for the finger is installed on the outer bend of the body, and the intraoral part includes a measuring rod with a graduated scale and a holder, wherein the end part of the rod is made in the form of a saddle, and the rod is movably installed along the through guide channel in the housing and is held by means of a screw retainer, and is additionally equipped with an elastic element resting between the end saddle of the rod and the housing (see patent RU No. 2727580 C1, MPK A61M 5/00, 2020). The disadvantages of this device are the lack of possibility of correction to the anatomical features of the patient and precise fixation relative to anatomical landmarks; impossibility of bilateral use (for anesthesia on both sides of the lower jaw).

All of the above solutions do not eliminate injuries to the mandibular nerve and inferior alveolar artery, and also do not provide the possibility of correction to the anatomical characteristics of the patient, the possibility of precise fixation relative to anatomical landmarks, and the possibility of bilateral use.

When creating a utility model, a technical problem is solved, which consists in expanding the arsenal of technical means for conducting mandibular anesthesia in the immediate vicinity of the inferior alveolar nerve.

The technical result consists in the implementation of this purpose.

Disclosure of the utility model To achieve the specified technical result, a device for performing mandibular anesthesia consists of two tubes of guide elements, one end of which is hingedly connected with the possibility of bringing together and spreading, and at the other end of one guide there is a guide element in the shape of a truncated cylinder for placing an injection syringe in it , the second guide has a jaw retainer with a head, while the guides have a curved part in the connection area and a straight part. The guide elements and the clamp with the head are removable. In addition, the distance between the axes of the head of the jaw clamp and the tube of the guide element is 125.0 mm.

The device is a three-dimensional stereolithographic structure manufactured using computer 3D modeling, created using computer modeling and when created using the finite element method, the deformed states of the interpterygoid space were studied at different positions of the lower jaw. The internal diameter of the guide element in the form of a truncated cylinder corresponds to the diameter of the body of the carpule dental syringe for free movement along the tube along its axis and has a distance between the axes of the head of the jaw retainer and the tube of the guide element of 125.0 mm, which corresponds to the length of the syringe placed inside the tube.

The presence of guides, one ends of which are hingedly connected with the possibility of bringing together and spreading, as well as the fact that they have a curved part in the connection zone and a straight part, provides the possibility of correction to the anatomical features of the patient and accurate fixation of the device taking them into account.

Brief description of the drawing

The utility model is illustrated in the drawings, where in FIG. Figure 1 shows a device for mandibular anesthesia. The following designations are used in the drawings: 1 - head of the jaw retainer; 2 - guide element for connection to head 1; 3 - hinge in the form of a threaded rivet; 4 - guide element for connection to tube 5; 5 - tube for the syringe.

Implementation of a utility model

The device for mandibular anesthesia consists of the following structural elements: a jaw retainer and guide elements, functionally interconnected.

The jaw retainer includes a head 1 and a guide element 2 for connection to the head 1. The jaw retainer is connected by a threaded rivet 3.

The head 1 of the jaw fixator is the fixing part behind the branch of the lower jaw on the side of the skin of the lateral part of the face.

The guide element 4 is connected to the tube 5, which is the syringe holder.

The head 1 of the jaw clamp is pre-fixed at a conditional point, which is located in the center of the line between the condylar process and the angle of the mandible.

The inner diameter of the tube 5 corresponds to the diameter of the syringe body, which can thus slide freely along the tube along its axis (Fig. 1).

In the process of creating the device, preliminary positioning of the guide elements was carried out according to averaged craniometric points and morphometric results using SolidWorks software (Choosing the optimal mandible position for inferior alveolar nerve block (IANB) using finite element analysis. Darawsheh, H.M., Safronova, A.A., Vasil' ev, Y.L., ...Saleev, N.R., Saleev, R.A. Annals of anatomy, 2023, 247, 152055).

To do this, a three-dimensional model of the device was superimposed on the STL model in a deformed state (with the jaw open by 46.0 ± 2.0 mm with a shift to the right by 17°), with the needle stroke marked.

The device works as follows.

When performing mandibular anesthesia on the right side, the patient is asked to open his mouth to the limit of freedom with a displacement of the lower jaw on the left side by 17°.

When performing mandibular anesthesia on the left side, the patient is asked to open his mouth to the limit of freedom with a displacement of the lower jaw on the right side by 17°.

By palpation, the condylar process (hereinafter - MO) and the edge of the lower jaw (hereinafter - EMF) are determined. The distance between the MO and the ELF is measured.

The middle of the obtained distance, point J, is the external reference point for the location of the head 1 of the jaw retainer.

Tube 5 of the guide element is placed at the point between the coronal parts of the first and second premolars with the jaw open on the opposite side (point T). The guide element is positioned so that the axis of the tube 5 overlaps point T.

The head 1 of the jaw retainer 1 is fixed in the area of the jaw at point J, and the tube 5 of the guide element is fixed in the area of the first and second premolars at point T so that the axis of the tube 5 coincides with the calculated axis of needle insertion.

Then the anesthetic is administered directly.

The inventive solution makes it possible to direct the needle of a syringe with a solution of local anesthetic to the area in close proximity to the inferior alveolar nerve with high accuracy in a short time, eliminating the inconvenience of the patient by taking into account corrections for the cranial index, facial index, shape of the lower jaw and degree of mouth opening.

Thus, the device makes it possible to increase the convenience and clarity of the manipulation, the possibility of correction to the anatomical features of the patient’s maxillofacial area, reduce risks and increase efficiency for administering a local anesthetic solution in close proximity to the inferior alveolar nerve.

Claims (3)

1. A device for mandibular anesthesia, consisting of two guides, one ends of which are hingedly connected with the possibility of bringing together and spreading, and at the other ends, on one guide, a guide element is installed in the form of a hollow cylinder truncated along the generatrix for placing an injection syringe in it, on On the other guide there is a jaw retainer with a head, wherein the guides have a curved part in the connection area and a straight part. 2. The device according to claim 1, characterized in that the guide elements and the retainer with the head are removable. 3. The device according to claim 1, characterized in that the distance between the axes of the head of the jaw retainer and the tube of the guide element is 125.0 mm.

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