CN115887028A - Root canal drilling and grinding system with auxiliary positioning guide plate - Google Patents

Abstract

The invention relates to a root canal therapy instrument, in particular to a root canal drilling and grinding system with an auxiliary positioning guide plate, which is used for root canal therapy of an affected tooth and comprises a clamping part, a guide part, a mobile phone and a bracket type guide plate; the guide piece comprises a guide piece body, a central hole and a guide post; the central hole is formed in the center of the guide piece body, and the guide posts are symmetrically arranged at two ends of the guide piece body by taking the central hole as the center; a machine needle is arranged on the mobile phone and penetrates through the central hole; the clamping piece is used for clamping and fixing the guide piece on the mobile phone; the bracket type guide plate comprises a columnar bracket and a retainer connected to the columnar bracket; the retainer wraps the retention teeth to fix the columnar bracket; the fixed columnar support is symmetrically provided with guide column slots at two sides of the affected tooth, and guide column slot cavities matched with the guide columns are formed in the guide column slots. Compared with the prior art, the invention solves the problems of poor guiding accuracy, small drilling and grinding operation space, high difficulty and narrow drainage and overflow channel in the prior art.

Description

Root canal drilling and grinding system with auxiliary positioning guide plate

Technical Field

The invention relates to a root canal treatment instrument, in particular to a root canal drilling and grinding system with an auxiliary positioning guide plate.

Background

Root canal therapy is the most common clinical treatment of dental pulp and periapical disease, and aims to remove inflammation or necrotic dental pulp, disinfect infected root canals, and promote healing of periapical lesions. Opening of the medullary cavity and exposing the root canal orifice are the primary steps of treatment, which are the prerequisite and basis for subsequent root canal disinfection and root canal filling.

Generally, a clinician performs the opening of the marrow and exploring the root canal orifice according to the anatomical morphology and the opening cavity type of the pulp cavity of the tooth and by combining clinical experience and hand feeling. However, due to individual differences in teeth, root canal variations, and calcification of the pulp cavity and root canal caused by aging or inflammation, clinicians need to perform precise opening of the pulp and positioning of the calcified root canal orifice with the aid of auxiliary examination and devices.

In the prior art, a cone beam X-ray computed tomography (CBCT) system is widely applied to oral clinical treatment, and doctors can judge the number of root canals, the position of the root canal orifice, the degree of medullary cavity and calcification of the root canal according to CBCT three-dimensional image results, thereby playing a certain guiding auxiliary role in operation. In recent years, various digital guide plates have been developed to successfully convert the three-dimensional guide function of image pictures into an entity auxiliary device, so that doctors can accurately control the drilling and grinding direction by means of guide holes/columns in the guide plates. The digital guide plate is synthesized by firstly obtaining a CT digital three-dimensional model through a CBCT image section, simultaneously registering and synthesizing the optical digital model obtained by an intraoral optical impression scanner and the optical digital model to form an integral digital three-dimensional model, and then manufacturing the guide plate by using a 3D printing technology.

The digital guide plate solves the problems of experience and hand feeling operation to a certain extent, but still has some problems, most guide plates are full-covering tooth surface type guide plates, the operation space of a tooth grinding area is narrow, the thickness of the guide plate self occupies a certain space, and the operation difficulty is increased. In addition, guiding hole/post on the baffle usually matches with the drill point diameter in order to reach the purpose of control direction, but the guiding hole diameter is comparatively narrow, and the unable abundant root canal that enters into of water spray of the high-speed cell-phone of dentistry leads to boring to grind the position and is difficult to obtain sufficient cooling, and simultaneously, the aperture is narrow also can lead to the excessive difficulty of piece waste liquid drainage, and then leads to the drill point to be hindered the unable normal drilling of power and grinds down, and the field of vision is fuzzy. Although this problem can be solved by adding debris evacuation channels, adding or enlarging tooth face exposure holes, etc., this method also reduces the accuracy of the guiding hole/post guiding, and the evacuation efficiency is low, which still cannot improve the drilling efficiency and the grinding effect. In addition, tooth surface opening can be realized by guiding the marrow opening direction through a laser instead of a guide plate guide hole, but the laser cost is high, and the guide device is large in size and is not suitable for conventional use.

Therefore, a new digital guide plate needs to be developed to solve the problems of high operation difficulty, narrow drainage and overflow channel and poor guiding accuracy, so as to better realize the establishment of calcified and variant root canal approaches.

Disclosure of Invention

The present invention is directed to solve at least one of the above problems, and an object of the present invention is to provide a root canal drilling and grinding system with an auxiliary positioning guide plate, which is used for root canal treatment, to solve the problems of poor guiding accuracy, small drilling and grinding operation space, high difficulty, and narrow discharge and overflow channel in the prior art, and to better implement calcification and establishment of variant root canal approach.

The purpose of the invention is realized by the following technical scheme:

a root canal drilling and grinding system with an auxiliary positioning guide plate is used for root canal treatment of a diseased tooth and comprises a clamping part, a guide part, a mobile phone and a bracket type guide plate;

the guide piece comprises a guide piece body, a central hole and a guide post; the central hole is arranged in the center of the guide piece body, and the guide posts are symmetrically arranged at two ends of the guide piece body by taking the central hole as the center;

the mobile phone is provided with a machine needle, and the machine needle penetrates through the central hole; the clamping and holding piece is used for clamping and fixing the guide piece on the mobile phone;

the bracket type guide plate comprises a columnar bracket and a retainer connected to the columnar bracket; the retainer is wrapped on the retaining tooth to fix the columnar bracket; the fixed columnar bracket is symmetrically provided with guide post slots at two sides of the affected tooth, and guide post slot cavities matched with the guide posts are formed in the guide post slots;

the guide post is inserted into the guide post slot cavity to guide the direction of the needle.

Preferably, the clamping and holding piece is fixed with fixing claws arranged at intervals, and the fixing claws are provided with bulges near the free ends; the guide piece also comprises a retention buckle arranged on the guide piece body, the retention buckle and the guide post are arranged in a reverse direction, and a groove is arranged at the position, close to the free end, of the retention buckle; the retention claw is arranged around the mobile phone and is clamped with the groove of the retention buckle through the bulge of the retention claw, so that the guide piece is clamped and fixed on the mobile phone. The guide piece is clamped and fixed on the mobile phone through the clamping piece, and can be quickly detached and installed as required; and the external clamping does not influence or change the original mobile phone structure, and can be used as an external accessory to be matched with the existing mobile phone for use.

Preferably, the surface of the guide post is marked with a millimeter scale. The drilling and grinding depth can be judged through the scales of the millimeter graduated scale during drilling and grinding, and a doctor can conveniently control the drilling and grinding process according to design.

Preferably, the mobile phone further comprises a water storage cavity arranged inside the mobile phone, and the water storage cavity is communicated to the free end of the needle through a water spraying pipeline. Cooling water in the water storage cavity is sprayed out from the head of the lathe needle along a water spraying pipeline to cool the drilled and ground holes; the delivery port of water spray pipe directly sets up in the car needle head, ensures that the cooling water can fully get into in boring the hole, makes its abundant cooling.

Preferably, the guide piece further comprises a suction hole and a suction device connecting port; the suction hole is arranged on the guide piece body around the central hole, and the suction device connecting port is arranged on the side edge of the guide piece body; the suction hole is communicated with the suction device connecting port in the guide piece body. The suction hole is arranged around the central hole and is communicated with the internal pipeline, and the suction device connecting port can be further connected with the strong suction device of the dental chair through the pipeline, so that when the abrasion drill is carried out, the strong suction device can discharge the chip waste liquid generated by the abrasion drill through the suction device connecting port, the internal pipeline and the suction hole.

Preferably, the mobile phone further comprises a suction apparatus head connecting port arranged on the side edge of the mobile phone; the suction apparatus head connecting port is communicated to the free end of the needle through a suction pipeline. The suction apparatus head connecting port is further connected with a strong suction apparatus pipeline of the dental chair, when the drill is ground, the strong suction apparatus discharges the chip waste liquid generated by the drill through a suction port arranged on the head of the needle, a suction pipeline and the suction apparatus head connecting port out of a hole of the drill; because directly set up in drill bit end department, therefore can in time discharge the brill hole that grinds most piece waste liquid that produces, avoid the waste liquid piece to pile up, lead to the brill mill downwards to produce extra resistance.

Preferably, the bracket type guide plate forms a surface type retention.

Preferably, the retained teeth are selected from teeth on both sides of the dentition centerline and not affected teeth, including one tooth on each of the proximal and distal sides of the affected tooth and at least one tooth on the opposite side of the dentition centerline of the affected tooth. The columnar support and the retainer are connected to form a quadrilateral surface type retention, so that the guide plate is integrally and stably retained on the tooth row, and the guide plate is prevented from shaking, tilting and dislocation in use.

Preferably, the retainer is partially covered on the retention tooth in the form of a crown, and is undercut by the buccal and lingual sides of the retention tooth, and

the surface pit and the groove are used for obtaining stable retention. The retainer closely contacts with the cheek, tongue/palate and/or the fixed tooth>

The supporting points form a quadrilateral surface type fixing body, and the fixing bodies are connected by a columnar bracket to form a bracket type guide plate which is firmly fixed.

Preferably, the columnar support is not attached to the oral soft tissue, so that the support type guide plate is prevented from damaging the oral soft tissue in the installation and use process.

Compared with the prior art, the invention has the following beneficial effects:

(1) The personalized guide plate used in the invention is a bracket type guide plate, the direction of the sewing needle is controlled by matching the guide post and the guide post groove, and the periphery of the sewing needle is not limited by a guide hole/channel, so that the guide plate is an innovative sleeveless guide plate. The sleeveless guide plate has the advantages that:

a) Smooth water inlet and drainage: when the sleeveless guide plate is used, the surface of an affected tooth is opened and is shielded by the sleeveless guide plate, the cooling water of the high-speed mobile phone can fully contact the tooth surface, and chips and waste liquid can be discharged smoothly. The delivery port and the suction port that cooperate car needle head portion to set up can directly aim at and bore the hole of grinding and cool off to in time the resorption of piece and the waste liquid that will bore the hole of grinding.

b) The visual field is wide: the surface of the affected tooth is not covered by the guide plate, so that a doctor can look directly at the affected tooth, and the doctor can conveniently operate and observe the affected tooth. The millimeter scale that sets up on the cooperation guide post further makes things convenient for the doctor to confirm the brill and grind the progress.

c) Accurately controlling the opening direction: when the turning needle is drilled and ground, no metal ring or guide hole/channel is arranged around the turning needle, and the guide post, the guide post groove and the turning needle are separated from each other at a certain interval and are not in direct contact with each other, so that the problem of direction deviation caused by the fact that the guide hole channel is damaged by high-speed drilling and grinding of the turning needle is solved.

d) The length of the needle is not limited: because of no guide plate covering on the affected tooth surface, additional thickness can not be generated, a lengthened car needle is not needed, the operation of the back tooth area is more convenient, and the applicability and the convenience are improved.

(2) According to the invention, the guide piece fixed on the high-speed mobile phone is provided with the suction hole, so that the generated debris waste liquid can be timely sucked while the high-speed mobile phone is drilled and ground, the operation visual field is clearer, and in addition, a saliva suction device is not required to be additionally arranged, so that the treatment comfort level of a patient is improved.

(3) The head part of the machine needle can spray water, so that cooling water can fully enter the root canal and effectively contact the wall of the root canal, and the brittle fracture of the dental tissue caused by heat generation is prevented. Meanwhile, the head part of the turning needle can realize negative pressure suction, can quickly suck waste liquid and scraps around a drilling and grinding point in the root canal, prevents the waste liquid from being accumulated at the bottom of a drilling and grinding channel, and prevents the drilling needle from being downwards drilled and ground due to resistance force; waste liquid and debris generated by drilling and grinding can be quickly and fully discharged by matching with the suction holes around the central hole of the guide piece.

(4) The personalized bracket type guide plate is in a surface type retention mode, adopts a partial crown mode, has a different curvature and the same working position with the design of the oral removable denture bracket, has good stability, covers a small area of a tooth surface, and has enough operation space.

(5) According to the invention, the guide column is provided with the millimeter graduated scale, so that the drilling and grinding depth of the lathe needle can be indicated, and the entry depth of the calcified root canal pulp cavity is determined by combining the three-dimensional image model, so that a clinical operator can accurately and quickly find the root canal opening.

Drawings

FIG. 1 is an exploded view of the system;

FIG. 2 is a schematic side view of the system after assembly;

FIG. 3 is a schematic structural view of a front view of the system after assembly and fixation;

FIG. 4 is a schematic diagram of the internal structure of the mobile phone;

FIG. 5 is a schematic structural view of a bracket type guide plate;

in the figure: 1-a retention pawl; 2-retention buckle; 3-a guide post; 4-a central bore; 5-a suction apparatus connecting port; 6-a guide body; 7-sewing needles; 8-suction holes; 9-a suction apparatus head connecting port; 10-a water spray pipeline; 11-a suction conduit; 12-a water storage cavity; 13-guide post socket cavity; 14-guide post slots; 15-affected tooth; 16-a retainer; 17-column shaped scaffold.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Example 1

A root canal drilling and grinding system with an auxiliary positioning guide plate is shown in figures 1-5 and is used for root canal treatment of a diseased tooth 15 and comprises a clamping piece, a guide piece, a mobile phone and a bracket type guide plate;

the guide comprises a guide body 6, a central bore 4 and a guide post 3; the central hole 4 is arranged in the center of the guide piece body 6, and the guide posts 3 are symmetrically arranged at two ends of the guide piece body 6 by taking the central hole 4 as the center;

a machine needle 7 is arranged on the mobile phone, and the machine needle 7 penetrates through the central hole 4; the clamping piece is used for clamping and fixing the guide piece on the mobile phone;

the bracket type guide plate comprises a cylindrical bracket 17 and a retainer 16 connected to the cylindrical bracket 17; the retainer 16 is coated on the retention tooth to fix the columnar bracket 17; the fixed columnar bracket 17 is symmetrically provided with guide post slots 14 at two sides of the affected tooth 15, and guide post slot cavities 13 matched with the guide posts 3 are formed in the guide post slots 14;

the guide post 3 is inserted into the guide post slot cavity 13 to guide the direction of the needle 7.

More specifically, in the present embodiment:

as shown in fig. 1-3, the drilling and grinding part of the positioning system is integrally composed of three parts, including a clasp, a guide and a mobile phone. The clamping and holding piece is mainly used for firmly clamping and fixing the guide piece on the mobile phone head.

4 fixing claws 1 which are annularly arranged are fixed on the body of the clamping piece, and the space formed inside the fixing claw 1 is just matched with the shape of the back of the handpiece of the mobile phone. The position of the fixing claw 1 close to the free end extends to two sides to form small bulges for being firmly clamped and fixed.

The guide piece comprises a guide piece body 6, a guide column 3 arranged on the front surface of the guide piece body 6 and a retention buckle 2 arranged on the back surface of the guide piece body 6. The retention buckle 2 is arranged corresponding to the retention claw 1 of the clamping and holding piece, the formed shape is matched with the front shape of the mobile phone head, a pair of symmetrical grooves are arranged at the position, close to the free end, of the retention buckle 2 and are matched with the protrusion of the retention claw 1 in a clamping manner (the retention buckle 2 of the guide piece shown in figure 1 only draws part, is actually matched with the number, position and shape of the retention claw 1 of the clamping and holding piece, and can wrap the outer part of the mobile phone head). The guide piece is clamped and fixed by the back of the mobile phone through the fixing claw 1, so that the guide piece can be fixed on the front of the head of the mobile phone. The center of the guide body 6 is provided with a central hole 4 for allowing a needle 7 fixed on the front surface of the handpiece head of the mobile phone to pass through. Guide post 3 uses central hole 4 to set up in pairs as the center, and be parallel to each other and symmetry, 20mm apart from between two guide posts 3, the external diameter of single guide post 3 is 2mm, and it is used for cooperateing with the posture baffle of support in order to realize the direction and guide. The outer side of the central hole 4 is further provided with an annular suction hole 8 surrounding the central hole 4, a suction device connecting port 5 is formed in the side edge of the guide piece body, the suction device connecting port 5 is communicated with the annular suction hole 8 through an internal pipeline, when the dental chair is used, the suction device connecting port 5 is connected to a strong suction device on the dental chair through a pipeline, and therefore the drilling and grinding holes can be timely sucked and discharged through the suction hole 8 when the debris waste liquid generated in the drilling and grinding process is discharged. Further, a millimeter scale is arranged on the surface of the guide column 3, and the depth of the downward drilling and grinding of the needle 7 is judged according to the millimeter scale on the guide column 3 when the marrow opening is carried out.

The mobile phone comprises a needle 7 arranged at the head of the mobile phone, and also comprises a water storage cavity 12 arranged inside the mobile phone as shown in fig. 4, wherein the water storage cavity 12 is communicated to the head of the needle 7 through a water spraying pipeline 10 inside the mobile phone, so that when drilling and grinding are carried out, water flow can be directly sprayed out from the needle head of the needle 7 to a drilling and grinding hole. The water spraying pipe 10 is connected with a micro water pump in the prior art, and cold water in the water storage cavity 12 is sprayed out from the water spraying pipe 10. In other embodiments, the water storage chamber 12 may be connected to an external water source to form a continuous spray of water without being limited by the size of the water storage chamber 12, as the water usage demands. In addition, a suction device head connecting port 9 is further arranged on the side of the mobile phone head, the suction device head connecting port 9 is communicated to the head of the needle 7 through a negative pressure suction pipeline 11 inside the mobile phone, and when drilling and grinding are carried out, the suction device head connecting port 9 is connected to a strong suction device on a dental chair through a pipeline, so that chip waste liquid generated in the drilling and grinding process can be discharged out of a drilling and grinding hole through the suction pipeline 11 and the suction device head connecting port 9 in time.

The bracket-type guide is shown in fig. 5, and is fixed in the oral cavity around the affected tooth 15. The main body of the bracket type guide plate is a retainer 16 and a columnar bracket 17 connected with each retainer 16, the retainer 16 adopts a partial crown form and utilizes the buccal and lingual side of the retaining teeth to be concave, an

Superficial fossa groove and closely clinging to cheek, tongue/palate and/or combination of teeth>

The face, and then each fulcrum forms quadrangle face formula maintenance, acquires stable maintenance, and the holistic stable maintenance of baffle is gone up on the tooth, avoids the baffle in use to take place to wave, stick up and dislocate. On a columnar support 17 at both sides of the affected tooth 15A guide post slot 14 is arranged, a guide post slot cavity 13 matched with the guide post 3 is arranged on the guide post slot 14, and the guide post 3 is inserted into the guide post slot cavity 13 to control and guide the drilling and grinding direction of the needle 7.

The bracket type guide plate is a customized guide plate customized according to the conditions of the dentition and the diseased tooth 15 of the oral cavity of a patient, is prepared by 3D printing and comprises the following specific steps:

before operation, CBCT scanning is carried out on the affected tooth 15, a CT digital three-dimensional model is obtained through image reconstruction, and the medullary cavity approach direction of the calcified root canal is determined according to the model. A bracket type guide plate is designed according to the tooth position of an affected tooth 15, when the fixed teeth are selected, 1 fixed tooth is respectively arranged in the near and far parts of the affected tooth 15, and 1-2 fixed teeth are selected on the opposite side of the central line of the dentition according to the position and the condition of the affected tooth 15. The optical digital three-dimensional model is obtained by scanning the retention teeth and the affected teeth 15 by using an intraoral optical scanner, and the integrated three-dimensional model is constructed by combining the CT digital three-dimensional model. On the model, the extension line of the central axis of the calcified root canal extends to

The plane is the medullary cavity approach, the extension line and->

The intersection point of the surfaces is the drilling and grinding point of the vehicle needle 7 which is located at->

Drawing a straight line which passes through a drilling and grinding point and is vertical to a connecting line of crest of an alveolar ridge on the surface, wherein two symmetrical points which are 10mm away from the drilling and grinding point on the straight line are openings of a guide post slot 14, drawing two straight lines which are parallel to a medullary cavity approach through the two openings respectively, namely the central axis of the guide post slot 14, taking the axis as the center, and a columnar body with the radius of 1mm is a guide post slot cavity 13, designing the guide post slot 14 according to the position of the guide post slot cavity 13, wherein the columnar supports 17 at two sides of a diseased tooth 15 are curves which are close to a far and middle retainer 16 and the guide post slot 14, the curves are connected with other retaining teeth to form a columnar support 17, and the columnar support 17 needs to be kept away from soft tissues in the oral cavity as far as possible. 3D printing is carried out after guide plate design is completedAnd (5) manufacturing to obtain the personalized and customized bracket type guide plate.

According to the needs, the root canal positioning system is arranged among different patients, the metal clamping piece, the guide piece and the needle 7 can be reused after high-temperature and high-pressure disinfection, and the personalized guide plate can be designed and replaced only according to the condition of the affected teeth 15.

This root canal positioning system passes through guide post 3 on the high-speed cell-phone and the control of guide post slot 14 realization on the posture baffle to high-speed cell-phone brill and grind the direction, and the brill depth of grinding can be instructed to the scale on the guide post 3. The guide piece body 6 and a strong suction device of the dental treatment chair can be connected by a hose, when the high-speed mobile phone drills and grinds, the scraps and waste liquid generated on the surface of the tooth are quickly sucked by the suction hole 8 of the guide piece body 6 and are discharged through the suction device connecting port 5. Set up spray pipe 10 and suction pipeline 11 in the needle 7, the connecting tube through the aircraft nose inside links to each other with water storage chamber 12 and strong suction of dental chair respectively, makes needle 7 head possess water spray and negative pressure suction function for attract the waste liquid and the piece in the root canal deep.

The embodiments described above are intended to facilitate a person of ordinary skill in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. A root canal drilling and grinding system with an auxiliary positioning guide plate is used for drilling and grinding a root canal of an affected tooth (15), and is characterized by comprising a clamping part, a guide part, a mobile phone and a bracket type guide plate;

the guide piece comprises a guide piece body (6), a central hole (4) and a guide column (3); the central hole (4) is formed in the center of the guide piece body (6), and the guide columns (3) are symmetrically arranged at two ends of the guide piece body (6) by taking the central hole (4) as a center;

the mobile phone is provided with a sewing needle (7), and the sewing needle (7) penetrates through the central hole (4); the clamping piece is used for clamping and fixing the guide piece on the mobile phone;

the bracket type guide plate comprises a columnar bracket (17) and a retainer (16) connected to the columnar bracket (17); the retainer (16) is covered on the retention tooth to fix the columnar bracket (17); guide post slots (14) are symmetrically arranged on the two sides of the affected tooth (15) of the fixed columnar support (17), and guide post slot cavities (13) matched with the guide posts (3) are formed in the guide post slots (14);

the guide post (3) is inserted into the guide post slot cavity (13) to guide the direction of the needle (7).

2. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1, wherein the clamping piece is fixed with spaced retaining claws (1), and the retaining claws (1) are provided with protrusions near the free ends; the guide piece also comprises a retention buckle (2) arranged on the guide piece body (6), the retention buckle (2) and the guide post (3) are arranged in a reverse direction, and a groove is formed in the retention buckle (2) close to the free end; the fixing claw (1) is arranged around the mobile phone and is clamped with the groove of the fixing buckle (2) through the bulge of the fixing claw (1), so that the guide piece is clamped and fixed on the mobile phone.

3. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1, wherein the surface of the guide column (3) is marked with a millimeter scale.

4. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1, wherein the mobile phone further comprises a water storage cavity (12) arranged inside the mobile phone, and the water storage cavity (12) is communicated to the free end of the needle (7) through a water spraying pipeline (10).

5. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1, wherein the guide member further comprises a suction hole (8) and a suction device connection port (5); the suction holes (8) are arranged on the guide piece body (6) around the central hole (4), and the suction device connecting port (5) is arranged on the side edge of the guide piece body (6); the suction hole (8) is communicated with the suction device connecting port (5) in the guide piece body (6).

6. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1, wherein the mobile phone further comprises an aspirator handpiece connection port (9) arranged at the side of the mobile phone; the suction apparatus head connecting port (9) is communicated to the free end of the needle (7) through a suction pipeline (11).

7. The system of claim 1, wherein the holder guide forms a face-on retention.

8. The root canal drilling and grinding system with the auxiliary positioning guide plate according to claim 7, wherein the retention teeth are selected from teeth on both sides of the central line of the dentition and not affected teeth (15), including one tooth in the proximal and distal directions of the affected tooth (15) and at least one tooth on the opposite side of the central line of the dentition of the affected tooth (15).

9. The root canal drilling and grinding system with the auxiliary positioning guide plate as claimed in claim 1 or 8, wherein the retainer (16) is wrapped on the retaining tooth in the form of a partial crown.

10. The root canal drilling and milling system with the auxiliary positioning guide plate as claimed in claim 1, wherein the columnar bracket (17) is not arranged to be attached to soft tissues of the oral cavity.

Images