CN104000661B - Oral cavity enlarging is filed - Google Patents

Abstract

The invention discloses an oral cavity enlargement file, which belongs to the technical field of medical device structures. In order to solve the problem that the existing oral enlargement files cannot treat the root canals of the posterior teeth and the root canals of patients with small mouth openings, the present invention provides an oral enlargement file, which includes a working end, a neck and a handle; The working end is connected with the neck; the neck is movably connected with the handle, and the length of the mouth enlargement file can be changed through the movably connection between the neck and the handle. The mouth enlargement file proposed by the invention can change its own length, and can perform root canal treatment on the posterior teeth of the oral cavity and the teeth of patients with small oral openings.

Description

mouth enlargement file

technical field

The invention relates to an oral cavity enlargement file, which belongs to the technical field of medical device structures for treating dental diseases, and specifically belongs to the technical field of medical device structures related to oral cavity expansion files.

Background technique

Diseases such as pulpitis and periapical periodontitis are dental diseases that we often encounter. The treatment method usually chooses root canal treatment. During the root canal treatment, it is necessary to use an oral expansion file to remove the inflammatory pulp and necrotic substances in the root canal.

FIG. 1 shows a conventional mouth enlargement file 40 . The mouth enlargement file 40 includes a working end 41 , a neck 42 and a handle 43 . There are two types of oral enlargement files 40 commonly used clinically at present, and the lengths are respectively 31 mm (millimeter) and 35 mm (millimeter). When performing root canal treatment, it is necessary to first put the oral enlargement file 40 into the oral cavity along the direction of the long axis of the tooth, and then insert the working end 41 into the tooth root canal after reaching the top of the tooth that needs root canal treatment. File to remove inflamed pulp and necrotic material from the root canal. However, some patients have a small mouth opening, about 20mm (millimeter) to 25mm (millimeter), or even smaller, so there is no way to put the oral enlargement file 40 into the mouth along the long axis of the tooth to insert the root canal of the tooth , root canal treatment is not possible. When treating the root canal of the posterior teeth in the oral cavity, because the space of the posterior teeth in the oral cavity is small, the existing oral enlargement files cannot be inserted vertically into the posterior tooth root canals, so the posterior teeth cannot be treated by root canal treatment.

Contents of the invention

The present invention proposes a mouth enlargement file to solve the problem that the existing mouth enlargement file cannot treat the root canals of the posterior teeth and the root canals of patients with small mouth openings.

The mouth enlargement file of the present invention includes a working end, a neck and a handle; the working end is connected to the neck; the neck is movably connected to the handle, and through the movement of the neck and the handle The connection can change the length of the mouth enlargement file.

The mouth enlargement file proposed by the present invention can change its own length, so that when root canal treatment is performed on the teeth of patients with a small mouth opening or the back teeth of the oral cavity, the mouth enlargement file is placed in the oral cavity along the long axis of the teeth. First, the length of the oral expansion file is shortened. After the oral expansion file is placed in the oral cavity, the oral expansion file is stretched and inserted into the root canal in a vertical direction, and then the root canal treatment is performed. The mouth enlargement file of the present invention can also carry out thorough root canal treatment on the affected tooth under the condition of retaining the affected tooth.

Wherein, the neck is movably connected to the handle in the following manner: the neck is provided with external threads, the handle is provided with a through hole, and the through hole is provided with an external thread that matches the neck. Internally threaded, the handle and the neck are threadedly engaged together.

Wherein, the outer surface of the handle is provided with grooves. When holding the oral enlargement file with tweezers or other clamping tools, the groove is used as a clamping point to ensure that the oral enlargement file is firmly clamped.

Wherein, the pitch of the internal thread of the handle is 0.4mm-1mm.

Wherein, the neck is movably connected with the handle as follows: the handle is provided with a cavity and a chute; the chute is arranged on the outer surface of the handle; the cavity is located below the chute, And communicate with the chute; the neck is inserted into the cavity; one end of the neck is provided with a through hole, the diameter of the middle part of the through hole is larger than the diameter of both ends; the through hole is installed with a moving handle, the outer surface of the mobile handle is respectively provided with a first protrusion and a second protrusion; the first protrusion and the second protrusion are circular; the first protrusion is located outside the through hole , the second protrusion is located inside the through hole; the moving handle can drive the neck to slide in the chute; the bottom of the chute is provided with at least one recess; a spring is installed in the recess, so The spring is fixed at the bottom of the recess, and the free length is equal to the depth of the recess.

Wherein, the groove bottom of the chute is provided with at least three recesses.

The groove bottom of the chute is provided with at least three recesses, and the neck can be fixed in at least three positions through the at least three recesses, so as to obtain at least three mouth enlargement files with different lengths.

Wherein, the flexible connection between the neck and the handle is as follows: the handle is provided with an internal hole and a groove, and the internal hole is located below the groove; gears are installed in the handle; The groove is located on the outer surface of the handle, and a metal strip is installed in the groove, and the metal strip can slide in the groove, and the metal strip is made of a magnetic material; the upper part of the groove is provided with Two beams; the lower part of the gear is located in the inner hole of the handle, the middle part is located in the groove, and the upper part is exposed from the surface of the handle; the neck is in the shape of a rack matching the gear; the neck It is inserted into the internal hole and meshed with the gear; the gear is made of magnetic material.

Wherein, the bottom of the groove is provided with a card. When the oral enlargement file is not in use, the card is located between the metal bar and the gear to separate the metal bar from the gear, preventing the metal bar from being attracted to the tooth groove by the gear, so that the gear can rotate.

Wherein, the surface of the metal strip is processed with roll lines, and the roll lines are evenly distributed on the outer surface of the metal strip. The roll pattern can increase the friction on the surface of the metal strip, which saves effort when moving the metal strip by hand.

Wherein, roll lines are processed on the surface of the handle, and the roll lines are evenly distributed on the outer surface of the handle. The roller pattern can increase the friction force on the surface of the handle, which is convenient for the doctor to hold during use.

Description of drawings

Fig. 1 is the schematic diagram of existing mouth enlargement file;

Fig. 2 is a schematic top view of the first embodiment of the present invention;

Fig. 3 is a schematic diagram of another shape of the handle of the first embodiment of the present invention;

Fig. 4 is a schematic top view of a second embodiment of the present invention;

Figure 5 is a schematic cross-sectional view of Figure 4 along the H-H direction;

6 is a schematic cross-sectional view of the neck of the second embodiment of the present invention;

7 is a schematic cross-sectional view of the connection between the neck and the moving handle in the second embodiment of the present invention;

Fig. 8 is a schematic cross-sectional view of the mobile handle fixed in the recess according to the second embodiment of the present invention;

Fig. 9 is a schematic cross-sectional view of the maximum compression spring of the mobile handle according to the second embodiment of the present invention;

Fig. 10 is a schematic cross-sectional view of the neck and the moving handle of the second embodiment of the present invention after spring reset;

Fig. 11 is a schematic top view of a third embodiment of the present invention;

FIG. 12 is a schematic cross-sectional view along the B-B direction of FIG. 11 .

detailed description

The technical solution of the present invention will be described in detail below with reference to FIGS. 2-12 . During the introduction, "forward" is a direction pointing to the left of the figure, and "backward" is a direction pointing to the right of the figure.

Embodiment one:

FIG. 2 is a schematic top view of the first embodiment of the present invention. The mouth enlargement file 10 includes a working end 11 , a neck 12 and a handle 13 . The working end 11 is a cylinder or a cone with threads on the surface. The neck 12 is a cylinder, and the neck 12 is provided with external threads. The handle 13 is provided with a through hole along its axial direction, the axis of the through hole is the same as the axis of the handle 13, and the internal thread matching the external thread of the neck 12 is arranged in the through hole, and the neck 12 is inserted into the through hole of the handle 13 Among them, the handle 13 and the neck 12 are engaged together by threads to form a threaded transmission device. The outer surface of the handle 13 is provided with an annular groove 14 surrounding the handle 13. When using tools such as tweezers to clamp the handle 13, the groove 14 is used as a clamping point for more stable clamping. Groove 14 also can be two grooves that are symmetrical with respect to the axis of handle 13, also plays the effect that handle 13 is clamped more firmly.

The usage method of the first embodiment of the present invention: before putting the mouth enlargement file 10 into the oral cavity, use tweezers or other clamping tools to hold the handle 13, rotate the neck 12, and shrink the neck 12 partly or completely into the handle 13. After the mouth enlargement file 10 is shortened to a length that can be put into the oral cavity, the mouth enlargement file 10 is put into the oral cavity in a direction perpendicular to the teeth. After the oral enlargement file 10 is located above the tooth to be root canal treated, use tweezers or other clamping tools to clamp the annular groove 14 of the handle 13, and then rotate the neck 12 with your fingers to make the neck 12 protrude in whole or in part handle 13, so that the oral cavity enlargement file 10 reaches a suitable length, the working end 11 is inserted into the root canal of the tooth, and the file is moved in the root canal to remove the inflammatory pulp and necrotic substances in the root canal. After the cleaning is completed, use tweezers or other clamping tools to hold the handle 13, rotate the neck 12, and reduce the length of the mouth enlargement file 10. After shrinking to a suitable length, the mouth enlargement file is taken out from the oral cavity.

Fig. 3 is the schematic diagram of another kind of shape of handle 13, and the middle part of handle 13 has recessed part 15, just can not establish groove 14 on handle 13 like this, when clamping handle 13 with tweezers or other clamping tools, recessed The portion 15 acts as a clamping point, and the handle 13 can also be clamped more firmly.

Wherein, the handle 13 and the neck 12 are threadedly engaged together to form a screw transmission device, and the handle 13 rotates one turn, and the displacement of the neck 12 is 0.4mm (millimeter)-1mm (millimeter), preferably 0.5mm (millimeter). The thread of the handle 13 is a single thread, and the pitch is 0.4mm (millimeter)-1mm (millimeter), preferably 0.5mm (millimeter). Before the root canal treatment, measure the length of the tooth root canal with an X-ray film, and then the required length of the oral enlargement file 10 can be obtained, and then the number of turns of the oral enlargement file 10 that needs to be rotated to reach the required length can be calculated. Rotate the handle 13 to the required number of turns, so as to ensure that the oral enlargement file 10 can be inserted into the end of the root canal to completely clean the root canal, and prevent the oral enlargement file 10 from penetrating too deep into the root canal and piercing the root canal.

Preferably, the surface of the handle 13 is processed with roll lines, and the roll lines are evenly distributed on the outer surface of the handle 13 to increase the friction force and facilitate the doctor's grip.

The mouth enlargement file proposed by the present invention can change its own length, so that when root canal treatment is performed on the teeth of patients with a small mouth opening or the back teeth of the oral cavity, the mouth enlargement file is placed in the oral cavity along the long axis of the teeth. First, the length of the oral expansion file is shortened. After the oral expansion file is placed in the oral cavity, the oral expansion file is stretched and inserted into the root canal in a vertical direction, and then the root canal treatment is performed. The mouth enlargement file of the present invention can also carry out thorough root canal treatment on the affected tooth under the condition of retaining the affected tooth.

Embodiment two:

Fig. 4 is a schematic top view of the second embodiment of the present invention. The mouth enlargement file 200 includes a working end 211, a neck 212 and a handle 213. The handle 213 is a rod structure as a whole, and the working end 211 is a cylinder or cylinder with threads on its surface. cone.

Fig. 5 is a schematic cross-sectional view of Fig. 4 along the H-H direction. The handle 213 is provided with a cavity 203 and a chute 201; The axes of 213 are the same. The chute 201 is located on the outer surface of the handle 213, the chute 201 communicates with the cavity 203, the chute 201 is located above the cavity 203; the neck 212 is inserted into the cavity 203, and one end of the neck 212 is equipped with a mobile handle 202 , moving the handle 202 can drive the neck 212 to slide in the cavity 203 . The front side and the back side of the groove bottom of the chute 201 are respectively provided with a recess 204; the bottom of the recess 204 is fixed with a spring 209, and the free length of the spring 209 is equal to the depth of the recess 204; the handle 213 is made of metal material, and the hardness of the metal material is large. , can prevent the spring 209 from pressing through the concave portion 204 .

6 is a schematic cross-sectional view of the neck of the second embodiment of the present invention, and FIG. 7 is a schematic cross-sectional view of the connection between the neck and the mobile handle of the second embodiment of the present invention. One end of the neck 212 is provided with a through hole 210, through which The axis of the hole 210 is perpendicular to the axis of the neck 212 , and the through hole 210 runs through the neck 212 . Through hole 210 comprises circular through hole upper part 214, circular through hole middle part 215, circular through hole lower part 216, the diameter of through hole middle part 215 is greater than the diameter of through hole upper part 214, the diameter of through hole middle part 215 is greater than through hole. The diameter of the lower part 216 of the hole, that is, the diameter of the middle part of the through hole 210 is larger than the diameter of both ends, the through hole 210 is in the shape of a Chinese character, and the cross section of the through hole 210 along its axis direction is stepped. A moving handle 202 is installed in the through hole 210 . The moving handle 202 is a cylinder and is vertically arranged in the through hole 210 . The upper surface of the moving handle 202 is provided with a first protrusion 206, the first protrusion 206 is circular, the raised surface of the first protrusion 206 is arc-shaped, and the first protrusion 206 is coaxial with the moving handle 202; The lower surface of the moving handle 202 is provided with a second protrusion 207 , the second protrusion 207 is circular, and the raised surface of the second protrusion 207 is arc-shaped, and the second protrusion 207 is coaxial with the moving handle 202 . After the moving handle 202 is installed in the through hole 210, when no pressure is applied to the moving handle 202, the first protrusion 206 is outside the through hole 210; the second protrusion 207 is located in the middle part 215 of the through hole 210, and the second protrusion 207 can prevent the moving handle 202 from slipping from the through hole 210 . Moving the handle 202 can drive the neck 212 to slide in the chute 201 , so that the neck 212 can shrink into the cavity 203 or extend out from the cavity 203 to adjust the length of the mouth enlargement file 200 .

Wherein, the moving handle 202 is made of elastic material, and the length of the moving handle 202 is 10mm (millimeter)-20mm (millimeter).

Wherein, the total number of turns n of the spring 209 is 5 turns to 10 turns, the diameter d of the spring wire is 1.1mm (millimeter) to 2.2mm (millimeter), the winding ratio C takes a value of 5-10, and the pitch t takes a value of 1.7mm ( mm)—3.4mm (mm).

The use process of the oral enlargement file 200 is introduced below in conjunction with Fig. 8, Fig. 9 and Fig. 10: before the oral enlargement file 200 is placed in the oral cavity, the moving handle 202 is pushed backward, the neck 212 shrinks into the cavity 203, and the length of the oral enlargement file 200 become shorter. When the moving handle 202 moved above the recess 204 on the rear side of the groove bottom of the chute 201, press the moving handle 202 downward with your fingers, and the first protrusion 206 on the upper end of the moving handle 202 enters the through hole middle part 215 of the through hole 210, The second protrusion 207 enters the recess 204 of the handle 213. At this time, the moving handle 202 presses the spring 209 downward, and the spring 209 deforms due to being pressed. The reset force of the spring 209 is 0.5N (Newton)--1.5N (Newton) ), the resetting force is not enough to push the second projection 207 of the moving handle 202 out of the recess 204, so that the moving handle 202 is fixed in the recess 204, the neck 212 cannot slide in the chute 201, and the length of the mouth enlargement file 200 is fixed. . The oral enlargement file 200 is then placed in the oral cavity. When the oral enlargement file 200 is put into the oral cavity and is located above the tooth to be treated for root canal treatment, continue to press the moving handle 202 downward to make the handle 202 compress the spring 209 to the maximum, so that the spring 209 continues to be compressed and deformed. Increase, so the restoring force increases, and now the returning force of spring 209 is 3N (Newton)--5N (Newton), at this moment hand decontrols moving handle 202, pushes moving handle 202 upwards due to larger restoring force, moves The handle 202 pops up, and finally the first protrusion 206 pops out of the through hole 210 , the second protrusion 207 pops out of the recess 204 , and pops into the middle portion 215 of the through hole 210 . When the spring 209 returns to the free length, it is equal to the depth of the recess 204. At this time, the moving handle 202 and the neck 212 return to their original positions, that is, the first protrusion 206 is outside the through hole 210, and the second protrusion 207 is outside the through hole 210. In the middle part 215 of the through hole, the moving handle 202 can slide in the chute 201, so that the length of the oral enlargement file 200 can be adjusted. Push the moving handle 202 forward, the neck 212 protrudes from the cavity 203, the length of the oral enlargement file 200 becomes longer, and when the moving handle 202 reaches the top of the recess 204 on the front side of the groove bottom, the same moving handle 202 makes the neck 212 Fix it, insert the working end 211 into the root canal of the tooth, use the oral expansion file 200 to file up and down in the root canal of the tooth, and remove the inflammatory pulp and necrotic substances in the root canal. After the file is completed in the root canal, continue to press the moving handle 202, so that the moving handle 202 can slide in the chute 201 again, so that the length of the oral cavity enlargement file 200 is shortened and taken out from the oral cavity.

By fixing the moving handle 202 in the concave portion 204, the position of the neck 212 is fixed, so that when the working end 211 files up and down in the root canal of the tooth, the neck 212 will not shrink into the cavity 203 due to force. The bottom of the chute 201 is preferably provided with at least three recesses 204. When the moving handle 202 is moved above one of the recesses 204 , the moving handle 202 is pressed down, and the moving handle 202 is fixed in the recess 204 . Because the mobile handle 202 is connected to the neck 212 , the neck 212 is fixed in the cavity 203 . The neck 212 can be fixed in one position through one recess 204 , and at least three recesses 204 are provided at the bottom of the sliding groove 201 , so as to obtain at least three mouth enlargement files 200 with different lengths.

The moving handle 202 is a cylinder, and the recess 204 can be a cylinder or a rectangle.

Preferably, the surface of the handle 213 is processed with roll lines, and the roll lines are evenly distributed on the outer surface of the handle 213, so as to increase the friction force and facilitate the doctor to hold it.

Embodiment three:

Fig. 11 is a schematic top view of the third embodiment of the present invention, and Fig. 12 is a schematic cross-sectional view of Fig. 11 along the B-B direction.

Oral enlargement file 30 includes a working end 31, a neck 32 and a handle 33; the working end 31 is a cylinder or cone with threads on the surface; the neck 32 is a cylinder; the handle 33 is a cylinder, and the handle 33 is provided with grooves 34, the inner hole 35, the gear 38 is installed in the handle 33.

Groove 34 is positioned at the outer surface of handle 33, and metal bar 36 is installed in the groove 34, and metal bar 36 is cylinder, and toggles metal bar 36, and metal bar 36 can slide in groove 34, and metal bar 36 is made of magnetic material Made; the upper part of the groove 34 is provided with two beams 39, the beams 39 can prevent the metal strip 36 from slipping out of the groove 34. A card 37 is provided at the bottom of the groove 34, and the card 37 has a rectangular structure.

The inner hole 35 is located below the groove 34 , the axis of the inner hole 35 is parallel to the axis of the handle 33 , and the neck 32 is inserted into the inner hole 35 and can move back and forth in the inner hole 35 .

Gear 38 is installed in the handle 33, and the axis of gear 38 is perpendicular to the axis of handle 33; When holding the handle 33, the fingers can toggle the gear 38; the neck 32 is in the shape of a rack matched with the gear 38, and the neck 32 is inserted into the inner hole 35 to mesh with the gear 38; the gear 38 is made of a magnet material, and the gear 38 Being able to attract the metal strip 36 , the metal strip 36 moves towards the gear 38 and finally gets stuck in the tooth groove of the gear 38 . When the mouth enlargement file 30 is not in use, the card 37 at the bottom of the groove 34 is located between the metal strip 36 and the gear 38, separating the metal strip 36 and the gear 38, preventing the metal strip 36 from being attracted into the tooth groove by the gear 38.

How to use: Before putting the oral expansion file 30 into the oral cavity, move the gear 38 forward, the neck 32 shrinks into the inner hole 35, the length of the oral expansion file 30 becomes shorter, and when the appropriate length is reached, put the oral expansion file 30 into the mouth. When the mouth enlargement file 30 is located above the tooth to be root canal treated, dial the gear 38 backward, the neck 32 protrudes from the inner hole 35, the length of the mouth enlargement file 30 becomes longer, and the working end 31 is inserted into the root canal of the tooth. After the mouth enlargement file 30 reaches the appropriate length, the metal strip 36 is moved to make the metal strip 36 cross the card 37. After crossing the card 37, the metal strip 36 is attracted by the magnetic force of the gear 38 and is attracted to the tooth groove of the gear 38. The gear 38 cannot continue to rotate, and the position of the neck 32 is fixed. Use the mouth enlargement file 30 to file up and down in the root canal of the tooth to remove the inflammatory pulp and necrotic substances in the root canal. After the dental enlargement file 30 has been filed in the root canal of the tooth, the metal bar 36 is pushed hard to separate the metal bar 36 from the gear 38 and pass over the card 37. At this time, the gear 38 can continue to rotate. 32 shrinks into the inner hole 35, the length of the mouth enlargement file 30 becomes shorter, and the mouth enlargement file 30 is taken out from the oral cavity.

Preferably, the surface of the metal strip 36 is processed with roll lines, and the roll lines are evenly distributed on the outer surface of the metal strip 36 .

Preferably, the surface of the handle 33 is processed with roll lines, and the roll lines are evenly distributed on the outer surface of the handle 33 to increase the friction force and facilitate the doctor to hold it.

In addition, the oral cavity expansion file disclosed by the present invention can also be applied in root canal expansion treatment, that is, the oral cavity expansion file is installed on the mobile phone clamping device.

Claims (2)

1. an oral cavity enlarging file, it is characterised in that include working end, cervical region and handle；Described working end It is connected with described cervical region；Described cervical region is flexibly connected with described handle, and described cervical region is with described handle activity even The mode connect is: described handle is provided with cavity and chute；Described chute is arranged on the outer surface of this handle； Described cavity is positioned at below described chute, and through with described chute；

Described cervical region inserts in described cavity；One end of described cervical region is provided with through hole, in the middle part of described through hole Diameter is more than the diameter at two ends；

Being provided with moving handle in described through hole, it is protruding that the outer surface of described moving handle is respectively arranged with first Protruding with second；Described first projection and the second projection are annular；Described first projection is positioned at described through hole Outside, described second projection is positioned at inside described through hole；Described moving handle can drive cervical region in chute Slide；

The bottom land of described chute is provided with at least one recess；Spring, described spring are installed in described recess It is fixed on the bottom of described recess, and the deep equality of drift and described recess.

Oral cavity enlarging the most according to claim 1 is filed, it is characterised in that the bottom land of described chute is arranged There is at least three recess.