ROOT CANAL THERAPY DEVICE WITH MECHANICAL VIBRATION MODE AND ROTATION DRIVE MODE

Abstract

A root canal therapy device with a mechanical vibration mode and a rotation drive mode includes a head, a handle, a first flexible drive shaft and a second flexible drive shaft. The head includes an outer main part, a mandrel part for mounting a root canal file, a first drive input shaft part and a second drive input shaft part. The mandrel part is mounted in the outer main part. A first drive motor and a second drive motor are disposed on the handle. The invention has the following beneficial effects: the root canal file can rotate and vibrate during root canal preparation, so that the wall of a root canal is efficiently cut by the file; and the file can also vibrate, so that cutting resistance and cutting temperature are effectively reduced, a smear layer is avoided, and the quality and efficiency of root canal preparation are improved.

Claims

1. A root canal therapy device with mechanical vibration mode and rotation drive mode, comprising a head, a handle, a first flexible drive shaft and a second flexible drive shaft, wherein the head comprises an outer main part, a mandrel part used for mounting a root canal file, a first drive input shaft part and a second drive input shaft part, the mandrel part is mounted in the outer main part, a first drive motor and a second drive motor are disposed on the handle, the first drive motor is connected to the first drive input shaft part through the first flexible drive shaft, the first drive input shaft part is connected to the mandrel part and drives the mandrel part to rotate, the second drive motor is connected to the second drive input shaft part through the second flexible drive shaft, and the second drive input shaft part is connected to the mandrel part and drives the mandrel part to vibrate mechanically.

2. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 1, wherein the second drive input shaft part comprises a vibration input shaft, a wheel, an eccentric shaft, a connecting plate and a vibration output shaft, the vibration input shaft has an end connected to the second flexible drive shaft and an end connected to the wheel, the eccentric shaft is mounted on the wheel, the connecting plate is mounted on the eccentric shaft, the vibration output shaft is mounted on the connecting plate, and the vibration output shaft is connected to the mandrel part and drives the mandrel part to vibrate mechanically.

3. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 2, wherein the mandrel part comprises a T-shaped end gear shaft mounted in the outer main part, an upper sleeve, an I-shaped wheel and a lower sleeve, the upper sleeve, the I-shaped wheel and the lower sleeve are disposed around the T-shaped end gear shaft from top to bottom, a lever ring is disposed around the I-shaped wheel and has an end rotatably connected to the outer main part and an end connected to the vibration output shaft, and the T-shaped end gear shaft is connected to the first drive input shaft part.

4. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 3, wherein an upper ball groove is formed between an upper end of the I-shaped wheel and the upper sleeve, a lower ball groove is formed between a lower end of the I-shaped wheel and the lower sleeve, balls are disposed in the upper ball groove and the lower ball groove, and the I-shaped wheel is in clearance fit with the T-shaped end gear shaft.

5. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 3, wherein holes are formed in a waist of the I-shaped wheel in a radial direction, the lever ring is a circular ring provided with a left lug and a right lug, and is disposed around a middle of the I-shaped wheel, and convex shafts protruding inwards in the radial direction are disposed on the lever ring and are in clearance fit with the holes in the I-shaped wheel.

6. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 5, wherein a left lug shaft hole is formed in the left lug of the lever ring, a left lug shaft is disposed on the outer main part, the left lug shaft hole is in clearance fit with the left lug shaft, a side plate is disposed on the right lug of the lever ring, and a right lug shaft hole is formed in a waist of the side plate and is in clearance fit with the vibration output shaft.

7. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 6, wherein the first drive input shaft part comprises a gear shaft mounted at a top of the side plate, and the gear shaft is engaged and connected with the T-shaped end gear shaft through a gear.

8. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 3, wherein the outer main part comprises a sleeve, the T-shaped end gear shaft, the upper sleeve, the I-shaped wheel and the lower sleeve are all mounted in the sleeve, an upper circular gland is disposed at an upper end of the sleeve, a lower circular gland is disposed at a lower end of the sleeve, the I-shaped wheel is disposed between the upper circular gland and the lower circular gland, an upper elastic ring is disposed between the I-shaped wheel and the upper circular gland, and a lower elastic ring is disposed between the I-shaped wheel and the lower circular gland.

9. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 8, wherein the upper elastic ring and the lower elastic ring are made of a high polymer material or a metal material, and are in the shape of a ring, a spring or a membrane.

10. The root canal therapy device with mechanical vibration mode and rotation drive mode according to claim 3, wherein a lock nut is connected to a lower end of the T-shaped end gear shaft and is attached to a lower end of the lower sleeve, and the lock nut locks the upper sleeve, the I-shaped wheel and the lower sleeve on the T-shaped end gear shaft.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0031] FIG. 1 is schematic diagram of a root canal file in the prior art.

[0032] FIG. 2 is a principle diagram of an ultrasonic root canal therapy apparatus in the prior art.

[0033] FIG. 3 is a schematic diagram of a root canal therapy device with a mechanical vibration mode and a rotation drive mode.

[0034] FIG. 4 is a schematic diagram of a head of the root canal therapy device with a mechanical vibration mode and a rotation drive mode.

[0035] FIG. 5 is a detailed structural diagram of the head of the root canal therapy device with a mechanical vibration mode and a rotation drive mode, wherein (a) is a structural diagram of an outer main part, (b) is a schematic diagram of a mandrel, (c) is a sectional view, and (d) is a sectional view.

[0036] FIG. 6 is a schematic diagram of a handle of the root canal therapy device with a mechanical vibration mode and a rotation drive mode.

[0037] FIG. 7 is a schematic diagram of a flexible drive shaft of the root canal therapy device with a mechanical vibration mode and a rotation drive mode.

DETAILED DESCRIPTION OF THE INVENTION

[0038] The invention will be further described below in conjunction with the accompanying drawings and specific implementations.

[0039] The objective of the invention is to provide a root canal therapy device which is used tooth root canal treatment and has a mechanical vibration mode and a rotation drive mode. Compared with the traditional rotary root canal therapy apparatus and the traditional ultrasonic vibration-type root canal therapy apparatus, the root canal therapy device provided by the invention effectively combines rotational motions and vibrating motions, thus improving the chip removal capacity of root canal files, drastically reducing cutting resistance and cutting temperature, avoiding a smear layer, effectively improving the quality of root canal preparation, and relieving the labor intensity of operators.

[0040] The invention relates to a root canal therapy device with a mechanical vibration mode and a rotation drive mode. The root canal therapy device is mainly constituted by a head 1, a handle 2, and flexible drive shafts 3 and 4, as shown in FIG. 3.

[0041] An outer main part of the head 1 is composed of a sleeve A1 and a shell A2, wherein the sleeve A1 and the shell A2 are rigidly and fixedly connected, and a tail end of the shell A2 is connected to the handle 2 in a stationary fit manner, as shown in FIG. 3, FIG. 4 and (a) in FIG. 5. An orifice A1-1 and an orifice A1-2 are formed in a wall of the sleeve A1, a shaft A1-3 is mounted in the orifice A1-1, and an orifice A2-1 is formed in the shell A2. A circular gland A1-4 and a circular gland A1-5 are disposed at an upper end and a lower end of the sleeve Al respectively, and an elastic ring A1-6 and an elastic ring A1-7 are disposed on inner sides of the circular glands respectively. An input shaft A2-2 is mounted in the shell A2, and the cross-section of a rear end of the input shaft A2-2 is square. A wheel A2-3 is fixedly mounted at a front end of the input shaft A2-2, and an eccentric shaft A2-4 is fixedly mounted on the wheel A2-3. A connecting plate A2-5 is movably mounted on the eccentric shaft A2-4, and a vibration output shaft A2-6 is fixedly mounted on the connecting plate A2-5.

[0042] The elastic ring A1-6 and the elastic ring A1-7 are made of a high polymer material or a metal, and are in the shape of a ring, a spring or a membrane. The mounting manner of the elastic rings is not limited.

[0043] A mandrel part of the head 1 consists of a T-shaped end gear shaft B 1, an upper sleeve B2, an I-shaped wheel B3, a lower sleeve B4 and a lock nut B5, as shown in FIG. 4 and (b) to (d) in FIG. 5. A through hole B1-1 is formed in the center of the T-shaped gear shaft B1, and a root canal file is fastened and mounted in the through hole B1-1. Balls B6 are arranged between the I-shaped wheel B3 and the upper sleeve B2 as well as between the I-shaped wheel B3 and the lower sleeve B4, grooves are formed in contact surfaces of the I-shaped wheel, the sleeves and the balls, and the balls B6 are able to roll in the grooves and will not fall off. A thread is arranged at a lower end of the T-shaped end gear shaft B1 and fits the lock nut B5, and the upper sleeve B2, the I-shaped wheel B3 and the lower sleeve B4 are locked on the T-shaped gear shaft B1 through the lock nut B5; a gap is formed between a center hole of the I-shaped wheel B3 and the T-shaped gear shaft B1, and the I-shaped wheel B3 is able to rotate freely with respect to the T-shaped gear shaft B1 through rolling of the balls B6. A hole B3-1 and a hole B3-2 are formed in a waist of the I-shaped wheel B3, as shown in (d) in FIG. 5.

[0044] The structure of the T-shaped end gear shaft B1 is not limited. An end gear may be arranged in the middle of the gear shaft.

[0045] The head 1 further includes a lever ring C1, as shown in FIG. 4 and (c) in FIG. 5. The lever ring C1 is a circular ring provided with lugs, and is disposed around the middle of the I-shaped wheel B3. A shaft hole C1-1 is formed in a left lug of the lever ring C1 and is in clearance fit with the shaft A1-3, and the lever ring C1 is able to swing around the shaft A1-3. A convex shaft C1-2 and a convex shaft C1-3, which protrude inwards, are fixedly mounted in the middle of the lever ring C1 and are in clearance fit with the hole B3-1 and the hole B2-1 of the I-shaped wheel B3 respectively, so that the I-shaped wheel B3 will be driven to move synchronously when the lever ring C1 swings. Because the I-shaped wheel B3 is locked on the T-shaped end gear shaft, the T-shaped end gear shaft will be driven to vibrate synchronously when the I-shaped wheel B3 vibrates. A side plate C1-4 is disposed on a right lug of the lever ring C1, and a shaft hole C1-5 is formed in a waist of the side plate and is clearance fit with the vibration output shaft C1-6. A gear shaft C1-6 is mounted at the top of the side plate C1-4, and the cross-section of ends of the gear shaft C1-6 is square.

[0046] As shown in FIG. 4 which illustrates an assembly diagram of the head 1, the I-shaped wheel B3 is elastically restrained in the middle of the sleeve A1 by means of the elastic ring A1-6 and the elastic ring A1-7, and the lever ring C1 is mounted on the I-shaped wheel B3, so that the head in the invention is formed. Wherein, the gear shaft C1-6 on the lever ring C1 is engaged with a gear on the T-shaped end gear shaft B1, and the shaft hole C1-5 in the side plate of the lever ring C1 is in clearance fit with the vibration output shaft A2-6.

[0047] A power supply 2-1, a drive control system 2-2, and rotary motors 2-3 and 2-4 are disposed in the handle 2, wherein an output shaft 2-3-1 of the rotary motor 2-3 and an output shaft 2-4-1 of the rotary motor 2-4 stretch out of a handle shell 2-5. An operation key 2-6 is disposed on the handle shell 2-5. A seam allowance 2-7 connected to the shell A2 is formed disposed a front end of the handle shell 2-5. The cross-section of the output shaft 2-3-1 of the rotary motor 2-3 and the output shaft of the 2-4-1 of the rotary motor 2-4 is square, as shown in

[0048] The structure of the flexible drive shaft 3 and the flexible drive shaft 4 is shown in FIG. 7. A coupling 3-2 and a coupling 3-3 are fastened and connected to two ends of a flexible shaft 3-1, a hole 3-4 in a square sectional shape and a hole 3-5 in a square sectional shape are formed in the center of the coupling 3-2 and in the center of the coupling 3-3 respectively, the hole 3-4 is in clearance fit with an end, in a square sectional shape, of the gear shaft C1-6, and the hole 3-5 is in clearance fit with the output shaft 2-3-1 of the rotary motor 2-3. The rotation of the rotary motor 2-3 is transmitted to the gear shaft C1-6 through the flexible shaft 3 to drive the gear shaft C1-6 to rotate. In this way, the rotation of the rotary motor 2-4 is transmitted to the output shaft A2-2 through the flexible shaft 4.

[0049] Flexible shafts of the flexible drive shaft 3 and the flexible drive shaft 4 may be flexible shafts made of stainless steel wires, flexible shafts made of high polymer materials, or rigid drive shafts provided with cardan joints.

[0050] When the root canal therapy device with a mechanical vibration mode and a rotation drive mode of the invention is used, the head 1 is connected to the seam allowance 2-7 on the handle 2 through the shell A2; the gear shaft C1-6 of the head is connected to the rotary motor 2-3 of the handle through the flexible drive shaft 3, and the input shaft A2-2 of the head is connected to the rotary motor 2-4 of the handle through the flexible drive shaft 4, so that the assembly shown in FIG. 3 is formed.

[0051] During work, a root canal file is fastened and mounted in the through hole B1-1 of the end gear shaft B1 in the head. When the rotary motor 2-3 inputs torque to the gear shaft C1-6 to drive the gear shaft C1-6 to rotate, the gear shaft C1-6 engaged with the T-shaped end gear shaft B1 will drive the T-shaped end gear shaft B1 and the root canal file mounted in the T-shaped end gear shaft B1 to rotate, and the I-shaped wheel B3 will not rotate synchronously. When the rotary motor 2-4 input torque to the shaft A2-2 to drive the shaft A2-2 to rotate, the wheel A2-3 will be driven to rotate to drive the eccentric shaft A2-4 to vibrate. Vibrations of the eccentric shaft A2-4 will be transmitted to the lever ring C1 through the connecting plate A2-5 and the vibration output shaft A2-6, so that the lever ring C1 is driven to vibrate. Due to the fact that the convex shaft C1-2 and the convex shaft C1-3 in the middle of the lever ring C 1 are in clearance fit with the hole B3-1 and the hole B3-2 of the I-shaped wheel B3, the I-shaped wheel C3 will be driven to vibrate synchronously when the lever ring C1 vibrates. Due to the fact that the I-shaped wheel B3, the upper sleeve B2 and the lower sleeve B4 are locked on the T-shaped gear shaft B1 through the lock nut B5, the T-shaped gear shaft B1 and the root canal file mounted in the T-shaped end gear shaft B1 will be driven to vibrate synchronously when the I-shaped wheel B3 vibrates. When the rotary motor 2-3 and the rotary motor 2-4 work synchronously, the root canal file will be driven to mechanically vibrate and rotate.

[0052] After use, the head 1, the flexible drive shafts 3 and 4, and the handle 2 can be separated from each other, and the head 1 and the flexible drive shaft 3 and 4 can be sterilized at a high temperature and a high pressure.

[0053] When the root canal therapy device with a mechanical vibration mode and a rotation drive mode is used, the root canal file can rotate and vibrate synchronously during work; during root canal preparation, the root canal file can rotate to cut the wall of a root canal and maintain the original root canal axis, and the root canal file can also vibrate to drastically reduce cutting resistance and cutting temperature; and liquid in the root canal is stirred when the root canal file vibrates, so that the chip removal capacity of the root canal file is improved, a smear layer is effectively avoided, the quality of root canal preparation is remarkably improved, and the labor intensity of operators is relieved.

[0054] The above contents are used to further explain the invention in detail in conjunction with specific preferred implementations, but the specific implementations of the invention are not restricted to the above description. Those ordinarily skilled in the art can make several simple deductions or substitutions with departing from the concept of the invention, and all these deductions or substitutions should also fall within the protection scope of the invention.