RU200069U1 - DENTIST CHAIR - Google Patents

Abstract

The utility model relates to medical equipment and is designed to fix the dentist's working arm in the forearm / elbow area. The dental chair contains a base, a seat, a backrest with a lifting mechanism, armrests. In this case, the armrests are installed on the left side of the chair, the first one for the patient, the second armrest for the doctor. Moreover, the armrest for the doctor is made in the form of a disc with a diameter of 2/3 of the length of the human ulna. The disc itself is pivotally fixed on one side of the retractable, swivel bar, the second end of the bar is fixed on a vertically mounted rod, which, in turn, is fixed in a pipe fixed to the dental chair. The proposed technical solution increases safety and eliminates the patient's injury by creating comfortable, stress-free working conditions for the dentist, eliminating overstrain of body muscles and displacement of internal organs. 4 ill.

Description

The proposed device dental chair refers to medicine, specifically to dentistry, and is intended for prosthetics, treatment and preventive examinations of the oral cavity.

From the prior art, the invention is known AC No. 23558, application No. 53356 dated 08.22.1929 "Dental chair", the technical solution is aimed at the ability to choose the most comfortable location of the doctor relative to the patient due to the rotating chair around the patient. This invention does not have a device for fixing the dentist's working hand and maintaining the level of work in the oral cavity selected for the entire treatment period. This leads to tension in almost all muscles and a displacement of the internal organs of the dentist due to the tilt of the whole body forward and to the right relative to the patient and the maintenance of uncomfortable working conditions throughout the working day. This, in turn, leads to a deterioration in the quality of treatment and occupational diseases of the doctor.

Patent No. 673145, application No. 1964829, with priority from 18.10.1973 "Dental chair" The technical solution is aimed at adjusting the patient's seat by means of a system of levers and a drive. This invention does not have a device for fixing the working arm of the dentist and maintaining the selected level of work in the oral cavity. This leads to tension in almost all muscles and displacement of the internal organs of the dentist due to the tilt of the whole body forward and to the right relative to the patient.

This, in turn, leads to a deterioration in the quality of treatment and occupational diseases of the doctor.

AC No. 1128948 application No. 3560490 dated 02.02.1983 "Dental chair", the technical solution is aimed at connecting the seat and backrest and the possibility of turning the backrest.

This invention does not have a device for fixing the working arm of the dentist and maintaining the selected level of work in the oral cavity. This leads to the tension of almost all muscles and the displacement of the internal organs of the dentist due to the tilt of the whole body forward and to the right and the maintenance of uncomfortable working conditions throughout the working day. This, in turn, leads to a deterioration in the quality of treatment and occupational diseases of the doctor.

AS No. 1093342 application 3563841 dated 03/11/1983, "Dental chair". The technical solution focuses on the design of the lift and the location of the patient chair. This invention does not have a device for fixing the dentist's working arm and maintaining the selected level of work in the oral cavity during the treatment period, which leads to tension of almost all muscles and displacement of the internal organs of the dentist due to the tilt of the body forward and to the right, and maintaining uncomfortable working conditions throughout working day. This, in turn, leads to a deterioration in the quality of treatment and occupational diseases of the dentist.

The invention of A.S. No. 1843010, application No. 4624299 dated 11.11.1988

"Operating chair" is a chair for a surgeon with a base, a seat, a backrest, two armrests with supports for the hands with the possibility of height adjustment of the armrests. This invention makes it possible to stabilize the position of the surgeon's hands and achieve precision in the manipulation of the surgeon's hands. The disadvantage of this invention is that, despite the presence of armrests, this chair in dentistry cannot be used when the patient is sitting in a chair, because a chair as a dentist's workplace should not only secure the dentist's working arm and maintain the level of work in the oral cavity selected for the entire period of treatment, but also ensure that the causes of tension in almost all muscles and displacement of the internal organs of the dentist arising from the tilt of the body are eliminated dentist forward and to the right and maintaining such working conditions throughout the working day. This, in turn, leads to a deterioration in the quality of treatment and occupational diseases of the doctor.

As a prototype of the proposed technical solution, AC No. 264618 was adopted, application No. 1222765 dated 03/04/1968, "Dental chair", because it coincides in the greatest number of essential features with the proposed technical solution. The technical solution for AC No. 264618 includes a base, a seat, a backrest, a lifting mechanism, two armrests, a footrest, a stand for a lamp, a glass spittoon, but the technical solution for AC No. 264618 does not have a device for fixing the dentist's working arm and preserving the chosen one for the period of treatment the patient's level of work in the oral cavity, which leads to tension of all muscles and displacement of internal organs due to the tilt of the dentist forward and to the right and the maintenance of uncomfortable working conditions throughout the working day. It leads to a deterioration in the quality of treatment and occupational diseases of the doctor.

All of the listed inventions, in each individual case, solve specific problems of improving the dental chair, but none of these inventions is aimed at creating a comfortable and safe working environment for a dentist.

All of the above inventions do not create conditions for performing work on the treatment of patients with high quality.

The proposed technical solution helps to eliminate stress and relieve fatigue under constant stress on the physician's body by achieving comfortable conditions, even during long-term work in the oral cavity.

The proposed technical solution increases safety and eliminates the patient's injury by creating comfortable, stress-free working conditions for the dentist, excluding overstrain of body muscles and displacement of internal organs.

Currently, the term “dental” chair has been replaced by “dental” chair in the medical literature.

The essential features of the proposed technical solution "dental chair" include features necessary for the direct functioning of the device - treatment, examinations and dental prosthetics with high quality.

The limiting features of the technical solution include base, seat, backrest, lift mechanism, armrests,

Signs

- armrests are installed on the left side of the chair,

- the first for the patient,

- second armrest for the doctor,

- the armrest for the doctor is made in the form of a disc,

- the armrest for the doctor is made with a diameter of 2/3 of the length of the human elbow bones,

- the disc is hinged on one side of the sliding pivot bar,

- the swivel bar consists of two parts, connected telescopically and is adjustable in length,

- the second end of the swivel rod is fixed on the vertically installed rod,

- the stem is fixed in the pipe,

- the tube is fixed to the dental chair.

The set of essential features of the proposed technical solution allows you to obtain the claimed technical result and is in a causal relationship with the specified result.

The set of signs of the distinctive part of the formula allows us to assert that the armrest for the doctor, containing all the distinctive features of the formula, is a necessary and sufficient condition for achieving the main technical result - it eliminates stress and helps relieve fatigue with a constant load on the doctor's body when working in the oral cavity.

The proposed technical solution increases safety and excludes injuries and improves the quality of all types of work in the treatment of patients. When using the totality of all the points of the formula, we will get a technical result - a dental chair safe for the health of the doctor. The technical result is to reduce physical stress on the dentist, to achieve a high quality of work performed, regardless of the length of service of the doctor and his physical condition and well-being, as well as to exclude the possibility of occupational diseases.

The technical result should include the simplification of complex dental operations, preparation of teeth for crowns, preparation of carious cavities, endodontic work, etc. During the work of a dentist using a support armrest, the tension of the muscles of the shoulder girdle decreases, the muscles of the back are unloaded, preventing the development of occupational diseases such as polyarthritis, tendovaginitis, and deforming spondylosis. This increases the physician's efficiency.

This device allows you to more accurately perform parallel movements relative to the preparation surfaces, improving the quality of the preparation of teeth, because the support armrest allows movement in the same plane, both left or right, and forward and backward, preventing the axis of the preparation or rotating instrument from being knocked down.

Relieving tension in the physician's body when tilting it to the right and forward eliminates pressure on the liver, bile ducts, intestines and hip joint. Prevents the occurrence of related diseases. This technical solution is the result of many years of work of dentists and their analysis of the problems that dentists face every day.

In the book "Ways of maintaining the dentist's working capacity", author Rudolf Schöbel, Medicine Publishing House, 1971, the causes and types of occupational diseases and their influence on the dentist's workability are analyzed, which confirms the correct solution of the technical problem by the authors of the development.

The purpose of this alleged invention is to improve the efficiency and quality of service delivery and to prevent occupational diseases of the dentist.

Brief Description of Drawings

FIG. 1 Dental chair device

The dental chair consists of a base (1), a seat with a leg support (2), a movable back (3), a lifting device (4), a headrest (5), an armrest installed on the left side of the chair (6), an armrest for a doctor made in the form disc (7). A dental unit (8) is fixed on the chair, which contains: a spittoon (9), a stand for a lamp (10), a cup holder (22), a doctor's module (11).

FIG. 2 Armrest device for the doctor.

Figure 2 shows an armrest device for a doctor, which is an integral part of the device "Dental chair", the armrest for a doctor is made in the form of a disk, hinged on the chair using a simple system of levers.

The armrest for the doctor is made in the form of a disc (7). The disk is hinged on one side of the retractable pivot rod on a 25 mm long cylindrical rod (21), which is inserted into a 30 mm long pipe section, welded to the outer end of the retractable part of the pivot rod (21). The swivel bar consists of two parts: an internal retractable and an external, telescopically connected. The retractable part is a rectangular bar or pipe with dimensions (300 × 15 × 25) mm (12). The second end of the sliding part is inserted into the outer part of the pivot bar, which is a rectangular pipe (250 × 20 × 30) mm (13) with a 180 mm long slot on the lower surface corresponding to the width (14) of the diameter of the M-6 fixing bolt (15 ) screwed through the slot into the retractable part of the pivot rod, which has a threaded hole at the bottom, located at a distance of 50 mm from the end of the retractable rod. The stationary part of the swivel rod is hinged by means of a welded rod, 80 mm long (16) inserted into a vertically installed and fixed round pipe. This is the movable part of the upright (18). The swivel rod stem can be rigidly fixed with a pressure bolt (17). The movable part of the vertical post, a round pipe with a length of 400 mm and an outer diameter of 20 mm, in turn, is fixed at the desired height in a fixed pipe (17) using a bolt with a thumbscrew (19) having an inner diameter of 21 mm, an outer diameter of 25 mm and a length of 450 mm ... The fixed tube (17) is fixed to the dental chair using a 5 mm metal plate (20) with holes that match the device for attaching to the dental unit chair. Implementation of the invention. The device - an armrest for a dentist is a part of a dental chair and is a structure fixed to a metal plate (20) (Fig. 2, Fig. 3).

FIG. 3 - an example of a specific attachment of the armrest to the KSEM-05 chair.

Metal plate 5 mm thick (20) (Fig. 2, Fig. 3) with 3 holes for the M8 bolt, which is attached to the place intended for attaching the dental unit

US-02, together with this installation. A pipe with a diameter of 25 mm (17) (Fig. 2, Fig. 3) is welded to the metal plate for fastening, the wall thickness is 2 mm, the length of the pipe is 450 mm. In the upper part of the pipe, at a distance of 20 mm from the edge, a hole is made in which an M8 thread is cut, into which an M8 bolt with a wing and a pointed threaded part, 10-15 mm long (19) is screwed (Fig. 2). An M8 bolt with a thumbscrew allows you to fix the inner part of the rack at the desired height - a movable tube that holds the swivel bar and the armrest disc. In the upper part of the rack - a movable pipe with a diameter of 20 mm includes a rod (16) (Fig. 2) with a diameter of 16 mm and a length of 80 mm, welded to the rotary rod (13) (Fig. 2). Swivel bar, which is made of 2 rectangular pipes, connected telescopically. Structurally, the swivel rod consists of two parts: an inner and an outer telescopically connected. The outer part is a rectangular pipe, 250 mm long, which has an incomplete cut on the bottom surface. On one side, a metal bar is inserted into a rectangular pipe, which has a threaded hole on the bottom surface, at a distance of 5 cm from the other end, corresponding to the projection of the slot. Through the slot in the outer part, a fixing bolt is screwed into the bar, which fixes the bar in the pipe in the desired position and prevents the movable bar from falling out of the pipe. At the outer end of the bar, the disc-armrest (7) is hingedly fixed (Fig. 1, Fig. 2). The hinge consists of a cylindrical rod, 25 mm long, fixed in the center of the disc and a 30 mm long pipe segment (21) (Fig. 2) welded to the outer end of the sliding part of the pivot rod. The second end of the retractable part of the pivot rod is inside another rectangular pipe (13) (Fig. 2), which is hinged to the rack / vertically mounted round pipe (18) (Fig. 2) by means of a cylindrical rod (16) (Fig. 2) 80 mm long, inserted from above into a 400 mm long tube (18) (Fig. 2), which in turn is fixed in a round tube (17) (Fig. 2) fixed to the dental chair (20) (Fig. 2).

The design is collapsible and consists of five parts (Fig. 2):

- disc support, / armrest for the doctor / diameter 300 mm (7)

- the extending part of the swivel bar / rectangular pipe or bar / 300 × 15 × 25 mm (12)

- the outer part of the swivel bar / rectangular pipe / 250 × 20 × 30 mm (13)

- inner (movable) part of the support post / round pipe /, with an outer diameter of 20 mm and a length of 400 mm (18)

- the outer part of the support leg / round tube /, inner diameter 21 mm, outer 25 mm, 450 mm long, welded to a plate for attaching the dental unit to the dental chair (17)

- plate 5 mm thick with holes for bolts (20)

On different chairs, the place for attaching the dental unit will have a different design, so the shape of the plate welded to the column will correspond to the standard dimensions of the connection on each chair.

The armrest itself is covered with a material used in dental technology, for example, polyurethane and covered with leatherette or artificial leather on top. The material must be resistant to disinfection preparations and ensure good contact with human skin or clothing fabric. The coating material should not be slippery.

The diameter of the disc-shaped armrest for ease of use is selected at the rate of 2/3 of the length of the human ulna. The length of the ulna, with certain tolerances, depends on the height of the person and ranges from 32 cm with an increase of about 2 meters, up to 24 cm with an increase of 1.5 meters. Accordingly, 2/3 of the length of the ulna is from 21.1 cm to 15.8 cm. Both of these sizes allow you to get high-quality support for the dentist's working arm, but in our opinion, the diameter of the armrest of an "average" statistical doctor with a height of 1 , 7 meters. The length of the ulna is 28 cm and the value of 2/3 of the length of the ulna will be 18.5 cm, which satisfies doctors of tall stature - the diameter of the support is 21 cm and of small stature - the diameter of the support is 16 cm.

However, it is also necessary to take into account the length of the hand with the fingers collected in pinches holding the instrument - in particular, the dental handpiece. The length of the hand in this state is approximately 10-15 cm. Therefore, for this particular design, we have chosen the size of the armrest with a diameter of 300 mm.

The proposed device is mounted on a dental chair KSEM - 05. (7) (Fig. 1).

The principle of the armrest is as follows:

- when the doctor's forearm is placed on the support in the area of the elbow joint, it is carried away by the doctor's hand due to friction and pressure and moves back and forth, to the sides, following the movements of the hand. The movement takes place in two movable joints:

- at the point of rotation in the center of the disk (21) (Fig. 2)

- at the point of rotation at the end of the movably installed and rotating rod (16) (Fig. 2)

These hinges are sufficient to move the arm over short distances, within 10-20 cm. The doctor, leaning his elbow on the support, makes movements simultaneously with the support, transferring the vertical load through the arm to the armrest.

In this case, the muscles that lift the shoulder and hold the hand in weight are unloaded. And all movements are performed due to the muscles of the trunk and a slight tilt of the body. Movements are made in a horizontal plane. The vertical movement of the instrument / for example / the tip occurs due to the mobility of the hand.

The armrest can be adjusted in height by moving the stem in the tube and fixing the stem with an M8 bolt with a wing and a pointed threaded part (19) (FIG. 2). A more accurate height adjustment can be carried out by changing the value of the pipe exit from the upper part of the stem and fixing the pipe with an M8 bolt with a wing and a pointed threaded part located on the stem.

In this case, the rod entering the pipe and welded to the swivel rod can be blocked - in this case, the entire structure becomes rigid.

Armrest adjustment algorithm.

1. Place the patient in the chair.

2. Adjust the height of the armrest so that the arm / working / rests freely on the armrest, without straining the shoulder muscles and can freely move back and forth, while keeping the body straight without deviating to the right.

3. Install the armrest along the length by moving the movable part of the swivel bar, depending on the inclination of the back of the chair.

4. You can start working.

The possibility of achieving the technical result of the development, expressed in reducing the physical exertion of the dentist, the ability to move the hand without straining the shoulder muscles (muscles that hold the hand in weight), as a result, improving the quality of work performed regardless of the doctor's work experience, work time and physical condition, facilitates carrying out complex dental procedures. This device facilitates the execution of parallel movements relative to the preparation surfaces, improving the quality of the preparation of the teeth, because the device allows you to make hand movements in one plane with support both left-right and forward-backward, preventing knocking down the axis of the preparing, rotating instrument.

The technical result is the safety of the dental chair for the health of the doctor. The achieved technical result is confirmed by scientific work: Rudolf Schebel "Ways of maintaining the dentist's working capacity" publishing house Medicine 1971. At the same time, it should be noted that the widespread use of this device will reduce the types of occupational diseases, eliminating the causes of their occurrence and increase the doctor's efficiency.

FIG. 4 An example of the specific use of the armrest in the work of a dentist - therapist

23 - right side view

24 is a front view from the patient's head.

Claims (1)

A dental chair containing a base, a seat, a backrest with a lifting mechanism, armrests, characterized in that the armrests are installed on the left side of the chair, the first for the patient, the second armrest for the doctor is made in the form of a disc with a diameter of 2/3 of the length of the human elbow bones, the disc itself is articulated is fixed on one side of a retractable, swivel rod, the other end of the rod is fixed on a vertically mounted rod, which, in turn, is fixed in a pipe fixed to the dental chair.

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