CN104688361A - Device for taking out broken instrument in root canal and take-out method thereof - Google Patents
Device for taking out broken instrument in root canal and take-out method thereof Download PDFInfo
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- CN104688361A CN104688361A CN201510079385.XA CN201510079385A CN104688361A CN 104688361 A CN104688361 A CN 104688361A CN 201510079385 A CN201510079385 A CN 201510079385A CN 104688361 A CN104688361 A CN 104688361A
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- inner separator
- pipe inner
- separator tool
- root
- trepan
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Abstract
The invention discloses a device for taking out a broken instrument in a root canal and a take-out method thereof. The device is characterized by comprising a mechanical trephine and a single-opened window sleeve, wherein the mechanical trephine is composed of a cylindrical trephine (1) and an adapter, wherein the adapter is composed of a connector (2) and a fastener (3); the cylindrical trephine (1) is connected with one end of the connector through a fastener; the other end of the connector is matched with a connector in a dentsply root canal treatment motor, so that the cylindrical trephine is arranged on the dentsply root canal treatment motor to realize rotary control on the cylindrical trephine; the single-opened window sleeve is composed of a single-opened window sleeve body (4), a wedge (5) and a clamping handle (6); and a manual trephine can be replaced with the mechanical trephine to form another set of device. According to the take-out method of the device for taking out the broken instrument in the root canal, a few of dental tissues are removed when the broken instrument in the root canal is taken out, and the device has the advantages of being simple and fast to operate.
Description
Technical field
The invention belongs to medical assistance instrument field, be specifically related to a kind of device and the removing method thereof that take out root pipe inner separator tool.
Background technology
Dental pulp disease and periapical disease are modal oral cavity chronic bacillary, infectious disease, and root canal therapy is treatment dental pulp disease and the most effective method of periapical disease.Root canal effectively reduces the microorganism in root pipe by mechanical-chemical preparation, and by three-dimensional filling, thus effectively promote the healing of periapical lesion.Root canal particularly uses multiple apparatus in root canal preparation, and as NiTi apparatus, barbed broach, Nickel-titanium stainless file, reamer etc., these apparatuses all fracture may occur in endodontic procedure.In root pipe, fracture is a kind of more thorny complication of root canal, and root pipe inner separator tool Obstructed canal, causes the downright bad infectious agent in root pipe or inflammatory pulpal tissue thoroughly not to clear up, have potential impact to prognosis.Fracture all may occur at a lot of root of the tooth, and especially bending tiny root pipe, as the nearly buccal root of maxillary molar and the mesial root of lower molar, and multidigit descends 1/3 in root.And the probability of machine NiTi apparatus generation fracture is 7 times of hands NiTi apparatus.
Micro-ultrasonic technique is the prefered method of taking out root pipe inner separator tool.The clinical procedure that micro-ultrasonic technique gets disconnected tool comprises and uses GG to bore to set up linear passages, and improvement GG bores and sets up platform, and ultrasonic instrument exposes separation instrument top 1-2mm, utilizes ultrasonic counterclockwise ring cutting, is taken out by separation instrument.In the process, in order to formed visual linear passages and apparatus can be movable space, inevitably need to remove part tissue of tooth.There is certain defect and influence factor in this method: 1. supersonic vibration makes NiTi instruments temperature raise rapidly, and apparatus can be caused again to fracture.2. remove the amount of tissue of tooth more, be particularly positioned at the separation instrument of root tip, the destructiveness for root pipe is comparatively large, easily causes that side is worn, survey of vertical root fracture.3. spinning movement when sleeve technology gets disconnected tool may cause some apparatus easily to move to root side, increases the difficulty of taking out.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of device and the removing method thereof that take out root pipe inner separator tool, removal tissue of tooth less when being characterized in making taking-up root pipe inner separator tool, there is simple to operate, advantage fast.
The device of taking-up root pipe inner separator tool of the present invention, be divided into two covers, a set ofly remove sleeve pipe for machine trepan and separation instrument, described machine trepan is made up of cylindrical trepan and adapter, described adapter is made up of connector and securing member, cylindrical ring drilled through securing member and was connected with one end of connector, interface on the other end of connector and Deng Shibai root canal motor matches, cylindrical trepan to be arranged on Spin Control Deng Shibai root canal motor realized to cylindrical trepan;
Described separation instrument removes sleeve pipe by sleeve pipe of singly windowing, chock, holding handle is formed, described holding handle is made up of upper and lower two jig arm and trip bolt, trip bolt crosses the screwed hole on upper clip arm and the circular hole on lower clip arm, described sleeve pipe one end of singly windowing is provided with the oval window of half, apart from working end 0.5mm, other end circumference is provided with the groove matched with the fork-shaped of the lower clip arm end of holding handle, described chock one end is the oblique section of arc, other end circumference is provided with the groove matched with the fork-shaped of the upper clip arm end of holding handle, described chock is inserted in singly windows in sleeve pipe, on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
Another set ofly remove sleeve pipe for hands trepan and separation instrument, described hands trepan is made up of cylindrical trepan, adapter and handle, described adapter is made up of connector and securing member, cylindrical ring drilled through securing member and was connected with one end of connector, and the other end of connector embeds in handle and is connected with handle.
Described separation instrument removes sleeve pipe by sleeve pipe of singly windowing, chock, holding handle is formed, described holding handle is made up of upper and lower two jig arm and trip bolt, trip bolt crosses the screwed hole on upper clip arm and the circular hole on lower clip arm, described sleeve pipe one end of singly windowing is provided with the oval window of half, apart from working end 0.5mm, other end circumference is provided with the groove matched with the fork-shaped of the lower clip arm end of holding handle, described chock one end is the oblique section of arc, other end circumference is provided with the groove matched with the fork-shaped of the upper clip arm end of holding handle, described chock is inserted in singly windows in sleeve pipe, on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
Above-mentioned two covers take out in the device of root pipe inner separator tool, and the internal-and external diameter of described sleeve pipe of singly windowing is equal with the internal-and external diameter of cylindrical trepan.
Above-mentioned two covers take out in the device of root pipe inner separator tool, and the upper clip arm of described holding handle and lower clip arm are provided with the turnover that angle is 135 °, so conveniently hold force lift.
Above-mentioned two covers take out in the device of root pipe inner separator tool, and the working end of described cylindrical trepan has cutting function, and working end internal diameter is a bit larger tham the root pipe inner separator tool side of being preced with diameter.
The device of taking-up root pipe inner separator tool of the present invention, the connector internal diameter of adapter has 0.8mm, 1.0mm, 1.2mm, 1.4mm tetra-kinds of specifications, be that the cylindrical trepan of 0.6mm, 0.8mm, 1.0mm, 1.2mm matches respectively with internal diameter, wherein trepan wall thickness 0.1 millimeter.
Casing length of singly windowing has 18mm, 25mm two kinds of specifications, corresponding chock length is 25mm, 30mm, these two kinds of length all have different diameters, its internal-and external diameter is equal with cylindrical trepan internal-and external diameter, internal diameter is 0.6mm, 0.8m, 1.0mm, 1.2mm, external diameter is 0.8mm, 1.0mm, 1.2mm, 1.4mm, and corresponding chock diameter is 0.5mm, 0.7mm, 0.9mm, 1.1mm.Clamper matches with the diameter of sleeve pipe of singly windowing, chock.Suitable sleeve pipe is chosen according to the diameter of the apparatus broken ends of fractured bone.
The removing method taking out the device of root pipe inner separator tool comprises the following steps:
When root pipe inner separator tool contacts tight with dentin, use mobile phone, GG bores, improvement GG bores and sets up by the direct line of sight path of root canal orifice to separation instrument hat side, machine trepan is mounted to Deng Shibai root canal motor by adapter, utilize its reverse function to reverse to enter linear passages and with root pipe inner separator tool close contact, simultaneously cylindrical trepan is rotated counterclockwise around the hat side of root pipe inner separator tool, row trephining around it, screws out root pipe inner separator tool; Or adopting hands trepan at the counterclockwise ring cutting of root pipe inner separator tool hat side row, root pipe inner separator tool screws out;
When screwing out the failure of root pipe inner separator tool with machine trepan or hands trepan, or root pipe inner separator tool contact with dentin closely time, separation instrument is adopted to remove sleeve pipe, sleeve pipe of singly windowing is used to entangle the root pipe inner separator tool side of being preced with 2mm, stubborn screw makes upper clip arm move to lower clip arm, drive chock to move vertically simultaneously, chock arc oblique section tip is inserted root pipe inner separator tool and singly windowed between internal surface of sleeve pipe, utilize wedge principle, root pipe inner separator tool is shifted, wedged the oval window of sleeve pipe of singly windowing, then the jig arm of described holding handle is lifted, lift out root pipe inner separator tool.
Compared with prior art, the present invention has following beneficial effect:
1, the device that the present invention takes out root pipe inner separator tool is divided into two covers, can according to the tightness degree choice for use whether having root pipe motor and root pipe inner separator tool to contact with dentin, the success rate that the design raising root pipe inner separator tool of singly windowing sleeve pipe takes out, and apparatus can be avoided to release root tip when taking out root pipe inner separator tool, and cylindrical trepan can fast in the capable trephining of separation instrument periphery, less removal tissue of tooth, effectively saves the operating time.
2, hands trepan of the present invention uses and separation instrument temperature can be avoided to raise rapidly, reduces heat production, coordinates sleeve pipe of singly windowing to use, prevents apparatus secondary separation.If do not have machine motor also can adopt hands trepan simultaneously, improve use popularity.
3, chock end of singly windowing in sleeve pipe of the present invention is the oblique section of arc, increases the probability in space between wedging separation instrument and sleeve pipe, and avoiding moves along sleeve pipe axis makes disconnected tool move to root Guan Genfang and increase taking-up difficulty.
Accompanying drawing explanation
Fig. 1 is the front view of the connector of adapter.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the right view of Fig. 1.
Fig. 4 is the front view of the securing member of the adapter of device of the present invention.
Fig. 5 is the right view of Fig. 4.
Fig. 6 is the structural representation of cylindrical trepan.
Fig. 7 is the enlarged drawing of I part in Fig. 6.
Fig. 8 is that machine trepan assembles later structural representation.
Fig. 9 is the front view of handle.
Figure 10 is the top view of Fig. 9.
Figure 11 is the left view of Figure 10.
Figure 12 is the structural representation of hands trepan.
Figure 13 is the operating diagram of machine trepan.
Figure 14 is the operating diagram of hands trepan.
Figure 15 is the front view of sleeve pipe of singly windowing.
Figure 16 is the top view of Figure 15.
Figure 17 is the structural representation of chock.
Figure 18 is the front view of holding handle.
Figure 19 is the left view of Figure 18.
Figure 20 is the structural representation that separation instrument removes sleeve pipe
Figure 21 is the operating diagram that separation instrument removes sleeve pipe.
The cylindrical trepan of 1-, 2-connector, 3-securing member, the mono-sleeve pipe of windowing of 4-, 5-chock, 6-holding handle, 7-trip bolt, 8-lower clip arm, 9-groove, 10-upper clip arm, 11-handle.
Detailed description of the invention
Below by embodiment, the present invention is specifically described; what be necessary to herein means out is that the present embodiment is only used to further illustrate the present invention; but can not be interpreted as limiting the scope of the invention, person skilled in art can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1 takes out one of the device and removing method thereof of root pipe inner separator tool
Described in the present embodiment, the structure of the device of root pipe inner separator tool is as Fig. 1 ~ 8,, shown in Figure 13, Figure 15 ~ 21, remove sleeve pipe by supporting machine trepan and separation instrument to form, described machine trepan is made up of cylindrical trepan 1 and adapter, the working end of described cylindrical trepan has cutting function, and working end diameter is a bit larger tham the root pipe inner separator tool side of being preced with diameter.Described adapter is made up of connector 2 and securing member 3, cylindrical ring drilled through securing member and was connected with one end of connector, interface on the other end of connector and Deng Shibai root canal motor matches, and Deng Shibai root canal motor realizes be rotated counterclockwise control to cylindrical trepan to be arranged on by cylindrical trepan;
Described separation instrument removes sleeve pipe and is made up of sleeve pipe 4 of singly windowing, chock 5, holding handle 6, described holding handle is made up of upper and lower two jig arm and trip bolt 7, trip bolt crosses two jig arm, trip bolt crosses the screwed hole on upper clip arm 10 and the circular hole on lower clip arm 8, and the upper clip arm 10 of holding handle 6 and lower clip arm 8 are provided with the turnover that angle is 135 °.Described sleeve pipe 4 one end of singly windowing is provided with the oval window of half apart from end 0.5mm place, window height size is about 1.5mm, the other end is provided with apart from end 15mm place circumference the groove 9 matched with the fork-shaped of lower clip arm 8 end of holding handle, described chock 5 one end is the oblique section of arc, the other end is provided with apart from end 20mm place circumference the groove 9 matched with the fork-shaped of upper clip arm 10 end of holding handle, described chock is inserted in singly windows in sleeve pipe, and on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
The connector internal diameter of adapter has 0.8mm, and the internal diameter of cylindrical trepan is 0.6mm, and casing length of singly windowing is 18mm, and corresponding chock length is 25mm, and casing inner diameter of singly windowing is 0.6mm, and external diameter is 0.8mm, and corresponding chock diameter is 0.5mm.
Take out one of removing method of the device of root pipe inner separator tool:
Because root pipe inner separator tool contacts closely with dentin, use mobile phone, GG bores, improvement GG bores and sets up by the direct line of sight path of root canal orifice to separation instrument hat side, machine trepan is mounted to Deng Shibai root canal motor by adapter, utilize its reverse function to reverse to enter linear passages and with root pipe inner separator tool close contact, simultaneously cylindrical trepan is rotated counterclockwise around the hat side of root pipe inner separator tool, row trephining around it, screws out root pipe inner separator tool; Or adopting hands trepan at the counterclockwise ring cutting of root pipe inner separator tool hat side row, root pipe inner separator tool screws out.
Embodiment 2 takes out device and the removing method two thereof of root pipe inner separator tool
The structure of the device of root pipe inner separator tool is taken out as Fig. 1 ~ 12 described in the present embodiment,, shown in Figure 14, Figure 15 ~ 21, remove sleeve pipe by supporting hands trepan and separation instrument to form, described hands trepan forms by by cylindrical trepan 1, adapter and handle 11, the working end of described cylindrical trepan has cutting function, and working end diameter is greater than the root pipe inner separator tool side of being preced with diameter.Described adapter is made up of connector 3 and securing member 4, and cylindrical ring drilled through securing member and is connected with one end of connector, and the other end of connector embeds in handle and is connected with handle.
Described separation instrument removes sleeve pipe and is made up of sleeve pipe 4 of singly windowing, chock 5, holding handle 6, described holding handle is made up of upper and lower two jig arm and trip bolt 7, trip bolt crosses two jig arm, trip bolt crosses the screwed hole on upper clip arm 10 and the circular hole on lower clip arm 8, and the upper clip arm 8 of holding handle and lower clip arm 9 are provided with the turnover that angle is 135 °.Described sleeve pipe 4 one end of singly windowing is provided with the oval window of half apart from end 0.5mm place, window height size is about 1.5mm, the other end is provided with apart from end 20mm place circumference the groove 9 matched with the fork-shaped of lower clip arm 8 end of holding handle, described chock 5 one end is the oblique section of arc, the other end is provided with apart from end 28mm place circumference the groove 9 matched with the fork-shaped of upper clip arm 10 end of holding handle, described chock is inserted in singly windows in sleeve pipe, and on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
The connector internal diameter of adapter has 1.2mm, and the internal diameter of cylindrical trepan is 1.0mm, and casing length of singly windowing is 25mm, and corresponding chock length is 30mm, and casing inner diameter of singly windowing is 1.0mm, and external diameter is 1.2mm, and corresponding chock diameter is 0.9mm.
Take out the removing method two of the device of root pipe inner separator tool:
Because root pipe inner separator tool contacts closely with dentin, use mobile phone, GG bores, and improvement GG bores and sets up by the direct line of sight path of root canal orifice to separation instrument hat side, adopt hands trepan at the counterclockwise ring cutting of root pipe inner separator tool hat side row, attempt to screw out root pipe inner separator tool; Screw out unsuccessfully, separation instrument is adopted to remove sleeve pipe, use sleeve pipe of singly windowing to entangle the root pipe inner separator tool side of being preced with 2mm, stubborn screw makes upper clip arm move to lower clip arm, drives chock to move vertically simultaneously, chock arc oblique section tip is inserted root pipe inner separator tool and singly windowed between internal surface of sleeve pipe, utilize wedge principle, root pipe inner separator tool is shifted, is wedged the oval window of sleeve pipe of singly windowing, then lift the jig arm of described holding handle, lift out root pipe inner separator tool.
Claims (10)
1. one kind is taken out the device of root pipe inner separator tool, it is characterized in that this device comprises supporting machine trepan and separation instrument removes sleeve pipe, described machine trepan is made up of cylindrical trepan (1) and adapter, described adapter is made up of connector (2) and securing member (3), cylindrical ring drilled through securing member and was connected with one end of connector, interface on the other end of connector and Deng Shibai root canal motor matches, and Deng Shibai root canal motor realizes be rotated counterclockwise control to cylindrical trepan to be arranged on by cylindrical trepan;
Described separation instrument removes sleeve pipe by sleeve pipe of singly windowing (4), chock (5), holding handle (6) is formed, described holding handle is made up of upper and lower two jig arm and trip bolt (7), trip bolt crosses the screwed hole on upper clip arm (10) and the circular hole on lower clip arm (8), described sleeve pipe (4) one end of singly windowing is provided with the oval window of half, other end circumference is provided with the groove (9) matched with the fork-shaped of the lower clip arm of holding handle (8) end, described chock (5) end is the oblique section of arc, other end circumference is provided with the groove (9) matched with the fork-shaped of the upper clip arm of holding handle (10) end, described chock is inserted in singly windows in sleeve pipe, on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
2. tell the device taking out root pipe inner separator tool according to claim 1, the internal-and external diameter of the sleeve pipe that it is characterized in that singly windowing described in this device is equal with the internal-and external diameter of cylindrical trepan.
3. tell the device taking out root pipe inner separator tool according to claim 1 or 2, it is characterized in that the upper clip arm (10) of holding handle described in this device and lower clip arm (8) are provided with the turnover that angle is 135 °.
4. according to claim 1 or 2, take out the device of root pipe inner separator tool, it is characterized in that the working end of cylindrical trepan described in this device has cutting function, working end inside diameter is greater than the root pipe inner separator tool side of being preced with diameter.
5. take out the device of root pipe inner separator tool according to claim 3, it is characterized in that the working end of described cylindrical trepan has cutting function, working end diameter is greater than the root pipe inner separator tool side of being preced with diameter.
6. one kind is taken out the device of root pipe inner separator tool, it is characterized in that this device comprises supporting hands trepan and separation instrument removes sleeve pipe, described hands trepan is made up of cylindrical trepan (1), adapter and handle (11), described adapter is made up of connector (3) and securing member (4), cylindrical ring drilled through securing member and was connected with one end of connector, and the other end of connector embeds in handle and is connected with handle.
Described separation instrument removes sleeve pipe by sleeve pipe of singly windowing (4), chock (5), holding handle (6) is formed, described holding handle is made up of upper and lower two jig arm and trip bolt (7), trip bolt crosses the screwed hole on upper clip arm (10) and the circular hole on lower clip arm (8), described sleeve pipe (4) one end of singly windowing is provided with the oval window of half, other end circumference is provided with the groove (9) matched with the fork-shaped of the lower clip arm of holding handle (8) end, described chock (5) end is the oblique section of arc, other end circumference is provided with the groove (9) matched with the fork-shaped of the upper clip arm of holding handle (10) end, described chock is inserted in singly windows in sleeve pipe, on described holding handle, the forked end of lower clip arm sticks into chock and the respective slot place of sleeve pipe of singly windowing respectively.
7. take out the device of root pipe inner separator tool according to claim 6, the internal-and external diameter of the sleeve pipe that it is characterized in that singly windowing described in this device is equal with the internal-and external diameter of cylindrical trepan.
8. tell the device taking out root pipe inner separator tool according to claim 7, it is characterized in that the upper clip arm (10) of holding handle described in this device and lower clip arm (8) are provided with the turnover that angle is 135 °.
9. according to claim 6 or 7, take out the device of root pipe inner separator tool, it is characterized in that the working end of cylindrical trepan described in this device has cutting function, working end internal diameter is greater than the root pipe inner separator tool side of being preced with diameter.
10., according to the removing method of the device of one of claim 1 ~ 9 described taking-up root pipe inner separator tool, it is characterized in that the method comprises the following steps:
When root pipe inner separator tool contacts tight with dentin, use mobile phone, GG bores, improvement GG bores and sets up by the direct line of sight path of root canal orifice to separation instrument hat side, machine trepan is mounted to Deng Shibai root canal motor by adapter, utilize its reverse function to reverse to enter linear passages and with root pipe inner separator tool close contact, simultaneously cylindrical trepan is rotated counterclockwise around the hat side of root pipe inner separator tool, row trephining around it, screws out root pipe inner separator tool; Or adopting hands trepan at the counterclockwise ring cutting of root pipe inner separator tool hat side row, root pipe inner separator tool screws out;
When screwing out the failure of root pipe inner separator tool with machine trepan or hands trepan, or root pipe inner separator tool contact with dentin closely time, adopt sleeve pipe of singly windowing, under the microscope, sleeve pipe of singly windowing is used to entangle the root pipe inner separator tool side of being preced with 2mm, stubborn screw makes upper clip arm move to lower clip arm, drive chock to move vertically simultaneously, chock arc oblique section tip is inserted root pipe inner separator tool and singly windowed between internal surface of sleeve pipe, utilize wedge principle, root pipe inner separator tool is shifted, wedged the oval window of sleeve pipe of singly windowing, then the jig arm of described holding handle is lifted, lift out root pipe inner separator tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510079385.XA CN104688361A (en) | 2015-02-14 | 2015-02-14 | Device for taking out broken instrument in root canal and take-out method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510079385.XA CN104688361A (en) | 2015-02-14 | 2015-02-14 | Device for taking out broken instrument in root canal and take-out method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104688361A true CN104688361A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510079385.XA Pending CN104688361A (en) | 2015-02-14 | 2015-02-14 | Device for taking out broken instrument in root canal and take-out method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104688361A (en) |
Cited By (4)
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| CN106580487A (en) * | 2016-12-22 | 2017-04-26 | 周奇峰 | Fractured instrument extractor in root canal |
| CN107115153A (en) * | 2016-02-24 | 2017-09-01 | 武汉大学口腔医学院 | In root pipe break thing removing method and realize this method separation instrument extract suit |
| US10813719B1 (en) | 2017-06-07 | 2020-10-27 | Sherif Radwan | Method and extraction device for removal of broken root canal file fragment |
| CN115105230A (en) * | 2022-07-06 | 2022-09-27 | 四川大学 | Combined lantern ring system for taking out broken instrument in root canal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107115153A (en) * | 2016-02-24 | 2017-09-01 | 武汉大学口腔医学院 | In root pipe break thing removing method and realize this method separation instrument extract suit |
| CN106580487A (en) * | 2016-12-22 | 2017-04-26 | 周奇峰 | Fractured instrument extractor in root canal |
| US10813719B1 (en) | 2017-06-07 | 2020-10-27 | Sherif Radwan | Method and extraction device for removal of broken root canal file fragment |
| CN115105230A (en) * | 2022-07-06 | 2022-09-27 | 四川大学 | Combined lantern ring system for taking out broken instrument in root canal |
| CN115105230B (en) * | 2022-07-06 | 2023-11-03 | 四川大学 | Combined lantern ring system for taking out root canal internal fracture instrument |
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