TWI757171B - A dental abrasive tool and methods of use - Google Patents

Abstract

A dental abrasive tool is used to solve the problems of poor appearance of teeth after extraction operations and training teeth for treatment. Includes a base with a plurality of placement parts, a sequence indicating part is positioned on at least one placement part; a first cutting drill is located at the placement part, the first cutting drill has a head end, a cutting section is located at the head end, and the length of the cutting section is 12-14mm; a first deep drilling needle is located at the placement part, the first deep drilling needle has a blade head, and the largest radial dimension is 3~3.5mm; a second deep drilling needle is located at the placement part, the second deep drilling needle has a blade head, and the largest radial dimension of the blade head is 7-9mm; And a polishing drill pin is located in the placing part, the polishing drill pin has a polishing part, and the polishing part is covered by emery grains with a diameter of 20-30 μm. The invention also provides a method of using the dental abrasive tool.

Description

Dental abrasives and methods of using the same

The present invention relates to a surgical instrument, in particular to a dental abrasive tool for grinding alveolar teeth, and a method of using the abrasive instrument.

Modern people's pursuit of beautiful appearance is not only limited to the correctness of facial skin or facial features, but also the teeth exposed when speaking or smiling. Therefore, when teeth are damaged due to diseases or accidents, How to take into account the maintenance of the aesthetics of the diseased teeth at the same time of surgery is a major test for dentists.

For example, when a damaged tooth is extracted, the alveolar bone will shrink horizontally and vertically, and the keratinized mucosa (Keratinized mocosa) will decrease, resulting in a decrease in the protection of the periodontal. In addition, after the tooth is extracted, not only The mucosal tissue around the extraction site will sag, causing atrophy in appearance, and it is easy to cause a gap between the new implant and the adjacent tooth, resulting in a poor appearance.

In addition, the current dental practitioners have insufficient skills to maintain the appearance of the patient's teeth after tooth extraction, and there is no effective standard procedure in the current medical books for the dental practitioners to refer to and learn, which leads to various dental practitioners. Inability to receive effective training, resulting in poor medical quality.

In view of this, it is still necessary to improve the problems caused by tooth extraction and the treatment of dental staff after tooth extraction.

In order to solve the above-mentioned problems, the object of the present invention is to provide a dental abrasive tool that can trim the alveolus of the tooth portion before performing the tooth extraction operation, so as to avoid the tissue atrophy around the tooth portion after the tooth extraction.

Another object of the present invention is to provide a dental abrasive tool, which can trim the teeth to maintain the tissue integrity of the keratinized mucosa, improve the periodontal protection, and maintain the integrity around the affected part after tooth extraction.

Another object of the present invention is to provide a method of using a dental abrasive tool for medical personnel to learn and train, so as to improve the quality of medical personnel and medical quality.

The directionality or similar terms used throughout the present disclosure, such as "front", "back", "left", "right", "top (top)", "bottom (bottom)", "inside", "outside" , "side surface", etc., mainly refer to the directions of the attached drawings, each directionality or its similar terms are only used to assist the description and understanding of the various embodiments of the present invention, and are not intended to limit the present invention.

The use of the quantifier "a" or "an" for the elements and components described throughout the present invention is only for convenience and provides a general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and a single The concept of also includes the plural case unless it is obvious that it means otherwise.

Similar terms such as "combined", "combined" or "assembled" mentioned in the whole text of the present invention mainly include the components that can be separated without destroying the components after the connection, or the components can not be separated after being connected, which are common knowledge in the field. It can be selected according to the material of the components to be connected or the assembly requirements.

The "tooth part" mentioned in the whole of the present invention can be a tooth mold for teaching, training and demonstration.

The dental abrasive tool of the present invention comprises: a base having a plurality of placing parts, A sequence marking portion is located on at least one placement portion; a first cutting drill pin is located in the placement portion, the first cutting drill pin has a head end, a cutting segment is located at the head end, and the length of the cutting segment is 12 ~14mm; a first deep drilling needle, located in the placement part, the first deep drilling needle has a blade head, the maximum radial dimension of the blade head is 3~3.5mm; a second deep drilling needle Drill needle, located in the placement part, the second deep drilling needle has a blade head, the maximum radial dimension of the blade head is 7~9mm; and a polished drill needle, located in the placement part, the polishing needle The drill needle has a polishing portion, and the polishing portion is covered by diamond grains with a diameter of 20-30 μm.

The method of using the dental abrasive tool of the present invention is used for a dental mold, and is performed by using the dental abrasive tool as described above, comprising: transversely cutting a tooth portion from the dental crown with the cutting section of the first cutting bur Cut to form a broken tooth; continue to grind the truncated face of the broken tooth with the first deep drill to a depth of 3~5mm; continue to carry out the truncated face of the broken tooth with the second deep drill grinding to a depth of more than 8 mm; and polishing the cut surface of the broken tooth with the polishing drill.

Accordingly, in the dental abrasive tool of the present invention, the base has a sequence marking portion to display the order of use of each drill, and the user uses the first cutting drill and the first deep drill in sequence. The needle, the second deep drilling needle and the polishing needle are used to guide the keratinized tissue on the teeth, which can avoid tissue atrophy around the teeth and achieve the effect of maintaining the aesthetic appearance of the patient's teeth. In addition, by using the dental abrasive tool of the present invention, it can be used to perform keratinized tissue guidance on a tooth, it can be used for dental medical personnel to learn, and the patient's teeth can be guided through keratinized tissue. After treatment, the gingiva can grow in the pulp cavity to avoid gingival recession, and after six to eight weeks, follow-up tooth extraction and bone filling can be performed to obtain a wider alveolar bone width, which can preserve the good state of the tooth tissue and achieve improvement. The efficacy of medical personnel quality.

Wherein, the several placement parts are several hole grooves, the first cutting drill needle, the first deep drilling needle, the second deep drilling needle and the polishing drill needle are respectively inserted into each of the Placement Department. In this way, the plurality of drill needles can be inserted into the plurality of placement parts, which has the function of improving the convenience of the user to take. effect.

Here, the sequence indicating part is a number. In this way, the order of use of each drill can be clearly marked, which has the effect of improving the convenience of use.

The dental abrasive tool of the present invention further comprises a cover body coupled to the upper surface of the base to cover the plurality of placement portions. In this way, the system has the effect of isolating the dust or moisture from the outside, so as to protect the sanitation of the drills.

Wherein, the length of the cutting section of the first cutting drill is 12.5 mm. In this way, the cutting segment can be used to cross-cut the dental crown, which has the effect of cutting off the tooth.

Wherein, the first deep drilling needle has a joint end, and the extension length of the blade head of the first deep drilling needle toward the joint end is 5 mm. In this way, it is possible to grind the teeth.

Wherein, the second deep drilling needle has a joint end, and the extension length of the blade head of the second deep drilling needle toward the joint end is 8 mm. In this way, the second deep drilling needle can precisely grind the teeth.

The dental abrasive tool of the present invention further comprises a second cutting drill located at the placement portion, the second cutting drill has a head end, a cutting section is located at the head end, and the cutting section has a length of 7-9 mm . In this way, the second cutting bur can cut the lingual tooth neck of the broken tooth.

The dental grinding tool of the present invention further comprises a first grinding drill located in the placement portion, the first grinding drill has a spherical blade portion, and the diameter of the spherical blade portion is 2.5-3.5 mm. In this way, the first grinding bur can trim the dentin in the pulp cavity through the spherical surface of the spherical blade.

The dental grinding tool of the present invention further comprises a second grinding drill located at the placement portion, the second grinding drill has a spherical blade portion, and the diameter of the spherical blade portion is 1.5-2.5 mm. In this way, the second grinding bur can use the spherical surface of the ball blade with a smaller diameter relative to the first grinding bur The effect of trimming the dentin in the pulp cavity in detail.

The dental abrasive tool of the present invention further comprises a dressing drill located at the placement portion, the dressing drill has a dressing end and a joint end, the diameter of the end face of the dressing end is 0.9-1.5 mm, the dressing The circumferential surface of the end portion extends 0.9 to 1.5 mm from the end surface toward the joint end of the dressing drill. In this way, the trimming drill has the effect of trimming the dentin in the pulp cavity into a plane.

The use method of the dental abrasive tool of the present invention is used in a dental mold, further comprising cutting the lingual tooth neck of the broken tooth in the pulp cavity of the tooth with the second cutting drill. In this way, the second cutting drill has the effect of cutting the lingual tooth neck of the broken tooth.

The use method of the dental abrasive tool of the present invention is used in a tooth mold, and further comprises rough trimming the dentin of the broken tooth section with the first abrasive drill. In this way, the first grinding bur has the effect of trimming the dentin in the pulp cavity through the spherical surface of the spherical blade.

The use method of the dental grinding tool of the present invention is used for a tooth mold, and further comprises finely trimming the sectional surface of the broken tooth with the second grinding drill. In this way, the second grinding bur has the effect of finely trimming the dentin in the pulp cavity by the spherical surface of the ball-blade portion having a smaller diameter than the first grinding bur.

The use method of the dental abrasive tool of the present invention is used in a tooth mold, and further comprises trimming the polished section surface into a flat surface with the trimming drill. In this way, the trimming drill has the effect of trimming the dentin in the pulp cavity into a plane.

1: Base

11: Placement Department

12: Sequence marking part

2: The first cutting drill

2a, 6a: head end

2b, 3b, 4b, 5b, 6b, 7b, 8b, 9b: binding ends

21,61: Cutting segment

3: The first deep drill

3a, 4a: Blade head

4: The second deep drill

5: Polished drill

5a: Polishing section

6: Second cutting drill

7: The first grinding drill

7a, 8a: Ball blade

8: Second grinding drill

9: Dressing drill

9a: Trim the ends

91: End face

92: Circumferential surface

T: cover body

H: tooth

H1: Broken tooth

[FIG. 1] An exploded perspective view of a preferred embodiment of the present invention.

[Fig. 2] A front view of the first cutting drill of the present invention.

[FIG. 3] A front view of the second cutting drill of the present invention.

[FIG. 4] A front view of the first deep drill of the present invention.

[FIG. 5] A front view of the second deep drilling needle of the present invention.

[Fig. 6] A front view of the first grinding drill of the present invention.

[Fig. 7] A front view of the second grinding drill of the present invention.

[Fig. 8] A front view of the polishing drill of the present invention.

[Fig. 9] A front view of the dressing drill of the present invention.

[Fig. 10] A schematic diagram of the usage sequence of a preferred embodiment of the present invention.

In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings: please refer to Figure 1, It is a preferred embodiment of the dental abrasive tool set of the present invention, and includes a base 1, on which a first cutting drill 2, a first drilling drill 3, a first cutting drill 2 are placed. Two dozen deep drills 4 and one polished drill 5.

The base 1 is used to store and store several drills for the convenience of the user and to protect the several drills. The base 1 can be a rectangular base, a circular base or other geometric shapes. The shape of the seat body is not limited in the present invention. In this embodiment, the base 1 is a long rectangular base, so that several drill needles can be arranged in sequence from one end of the base 1 to the other end, so that the user can intuitively and sequentially take each drill. Drill needles, or place several drill needles on the base 1 in sequence. The base 1 has a plurality of placement portions 11 , the placement portions 11 may be located on the surface of the base 1 , and the placement portions 11 may have shapes corresponding to the drill bits and The number of grooves, for example, the plurality of placement portions 11 can be a plurality of long grooves, so that the plurality of drills can be placed on the placement portion 11. In this embodiment, the plurality of placement portions 11 are several holes, so that the drills can be inserted into the placement portions 11, In order to improve the convenience of users. The base 1 can have a sequence marking portion 12, the sequence marking portion 12 is located at least one placing portion 11, the sequence marking portion 12 can be an arrow, or the sequence marking portion 12 can be a number, so that they can be respectively The indication is based on the order in which the plurality of placement parts 11 take the plurality of drill needles. In addition, a cover body T can also be combined with the upper surface of the base 1 to cover the plurality of placing portions 11 to isolate dust or moisture from the outside.

Referring to Figures 1 and 2, each drill can be driven by a driving member to rotate at a high speed, so that each drill can grind and dress the teeth H (as shown in Figure 10). The driving member may be a conventional dental handpiece, which can be understood by those skilled in the art, and will not be described in detail in the present invention. The first cutting drill 2 has a head end 2a and a coupling end 2b, the coupling end 2b can be used for coupling with the driving member so that the driving member drives the first cutting drill 2 to rotate. In addition, the first cutting drill The needle 2 can be inserted into the placing portion 11 from the joint end 2b for storage. The first cutting drill needle 2 has a cutting section 21, and the cutting section 21 can be coated with diamond grains with a diameter of 106-125 μm. A rough surface of the surface of the first cutting drill 2, the cutting segment 21 is formed by extending from the head end 2a toward the joint end 2b, so that when the first cutting drill 2 rotates at a high speed, the cutting segment 21 can be 21 forms grinding and cutting on the tooth portion H, and the extension length of the cutting section 21 is 12-14 mm, preferably 13 mm, so that the cutting section 21 can be used for transversely cutting the tooth portion H to cut off the tooth portion H.

Please refer to FIG. 4 , the first deep drilling needle 3 has a blade head 3a and a joint end 3b, and the joint end 3b can be used for connecting to the driving element and being inserted into the placing portion 11 . The blade head 3a can be coated with diamond grains with a diameter of 106-125 μm to form a rough surface. The maximum radial dimension of the blade head 3a is 3~3.5mm, preferably 3.3mm. The extension length of one end of the deep drilling needle 3 toward the joint end 3b is 3~6mm, preferably 5mm. In this way, the blade head 3a can be used for vertical grinding of the tooth portion H, and the The dentin is shaved to expose the pulp cavity.

Please refer to FIG. 5, the second deep drill 4 has a blade head 4a and a The joint end 4b, the blade head 4a can be coated with diamond grains with a diameter of 106-125μm to form a rough surface, the joint end 4b can be used to be combined with the driver and inserted in the placing portion 11, the blade head 4a is 7~9mm, preferably 8mm, from one end of the second deep drilling needle 4 toward the joint end 4b. It is worth noting that the second deep drilling needle 4 is used to extend into the pulp In order to further deepen the exposure of the pulp cavity, the maximum radial dimension between the opposite sides of the blade head 4a is 2.5mm, so that the second drilling needle 4 can extend into the pulp In the cavity, because the second drilling needle 4 has a smaller radial size, when grinding in the depth of the pulp cavity, it can avoid damage to the surrounding tissue, and can accurately drill the depth of the pulp cavity. dentin for grinding.

Referring to FIG. 8, the polishing drill 5 has a polishing portion 5a and a joint end 5b, the polishing portion 5a is located at one end of the polishing drill 5, and the polishing portion 5a faces from one end of the polishing drill 5 toward The extension length of the joint end 5b is 4~6mm, preferably 5mm. The joint end 5b can be used to combine with the driving element and be inserted into the placing portion 11. The polishing portion 5a is made of diamond with a diameter of 20~30μm. Coated with sand grains, the polishing portion 5a can finely grind the dentin in the pulp cavity for polishing.

The dental abrasive tool set of the present invention may further comprise a second cutting drill 6 , a first grinding drill 7 , a second grinding drill 8 and a dressing drill 9 .

Referring to FIG. 3, the second cutting drill 6 has a head end 6a and a joint end 6b. The joint end 6b can be used for connecting to the driving element and inserting it into the placing portion 11. The second cutting The drill needle 6 has a cutting section 61, and the cutting section 61 can be a rough surface surrounding the surface of the second cutting drill needle 6. The rough surface can be formed by coating diamond grains with a diameter of 106-125 μm. The cutting segment 61 is formed by extending from the head end 6a toward the joint end 6b, so that when the second cutting drill 6 rotates at a high speed, the cutting segment 61 can cut the lingual tooth neck. It is worth noting that , the extension length of the cutting section 61 is 7-9 mm, preferably 8 mm, so that the risk of the cutting section 61 touching the lips or tongue around the teeth H by mistake can be reduced.

Please refer to FIG. 6 , the first grinding drill 7 has a ball edge portion 7a and a joint end 7b, the ball edge portion 7a is located at one end of the first grinding drill pin 7, and the ball edge portion 7a is formed by Coated with diamond grains with a diameter of 106-125 μm, the connecting end 7b can be used to connect to the driving element and be inserted into the placing portion 11 , and the diameter of the ball-blade portion 7a is 2.5-3.5 mm, preferably 3 mm, In this way, the first grinding bur 7 can trim the dentin in the pulp cavity through the spherical surface of the spherical blade portion 7a.

Please refer to FIG. 7 , the second grinding drill 8 has a ball edge portion 8a and a joint end 8b, the ball edge portion 8a is located at one end of the second grinding drill pin 8, and the ball edge portion 8a is formed by Coated with diamond grains with a diameter of 106-125 μm, the connecting end 8b can be used to connect to the driving element and be inserted into the placing portion 11 , and the diameter of the ball-blade portion 8a is 1.5-2.5 mm, preferably 2 mm, In this way, the second grinding bur 8 can perform detailed trimming of the dentin in the pulp cavity by the spherical surface of the ball blade portion 8 a with a smaller diameter than the first grinding bur 7 .

Referring to FIG. 9, the trimming drill 9 has a trimming end 9a and a combining end 9b. The combining end 9b can be used to connect with the driving element and be inserted into the placing portion 11. The trimming end 9a can be formed by covering the end surface 91 of the dressing drill 9 and the peripheral surface 92 of the dressing drill 9 by diamond grains with a diameter of 106-125 μm. The diameter of the end surface of the dressing end 9a is 0.9-1.5 mm, preferably is 1mm, and the circumferential surface 92 of the trimmed end portion 9a extends from the end surface 91 toward the joint end 9b by 0.9-1.5mm, preferably 1mm, to avoid damaging the polished dentin surface. In this way, the trimming The ends can be trimmed to a flat surface from the polished dentin surface.

In addition, the number of each drill can be several, so that each drill can be replaced when worn. In this embodiment, the first cutting drill 2, the second cutting drill 6, the first cutting drill The deep drill 3 and the second deep drill 4 have a relatively large amount of grinding on the teeth H. Therefore, the first cutting drill 2, the second cutting drill 6, the first deep drill The number of the needles 3 and the second drilling needles 4 is two, respectively, so as to facilitate immediate replacement during the operation.

Referring to Fig. 10, the dental abrasive tool set of the present invention can be used for the tooth portion H to perform a keratinized mucosa inductive technique (Keratinized Mucosa Inductive Technique). The cutting section 21 transversely cuts the tooth portion H from the dental crown to form a broken tooth H1, so that the protruding tooth portion H can be removed. The lingual tooth neck is cut.

Continue to grind the cut-off surface of the broken tooth H1 with the first deep drilling needle 3 to gradually remove the broken tooth H1, so that the broken tooth H1 can be formed downward to a depth of at least 3 mm, preferably 5 mm. The depth, thus, forms the first drilling depth. Then, the cutting edge head 4a of the second deep drilling needle 4 has a smaller radial dimension, the section of the broken tooth H1 can be further ground, for example, the broken tooth H1 can be made Down to a depth of at least 8mm.

In order to make the section of the broken tooth H1 flat, the first grinding drill 7 can be used to rough trim the cross section of the broken tooth H1, or the second grinding drill 8 can be used for detailed trimming, preferably, The system can be trimmed with the first grinding drill 7 and then the second grinding drill 8, so as to reduce the roughness of the section of the broken tooth H1, and then, the polishing drill 5 further The truncated surface of the broken tooth H1 is polished. For example, the polishing drill 5 can polish the section after the second grinding drill 8 is trimmed in detail. Preferably, the polishing drill 9 is used to polish the polished surface. Trim to a flat surface.

To sum up, in the dental abrasive tool of the present invention, the base has a sequence marking portion to display the order of use of each drill, and the user uses the first cutting drill, the first drill in sequence The deep drill needle, the second deep drill needle and the polished drill needle are used to guide the keratinized tissue on the teeth, which can avoid tissue atrophy around the teeth and achieve the effect of maintaining the aesthetic appearance of the patient's teeth. In addition, by using the dental abrasive tool of the present invention, it can be used to perform keratinized tissue guidance on a tooth, it can provide dental medical personnel with learning, and can be applied to patient surgery, and the patient's tooth can be passed through After keratinized tissue guidance, the gums can grow in the pulp cavity to avoid gingival recession After six to eight weeks, follow-up tooth extraction and bone filling can be performed to obtain a wider alveolar bone width, which can preserve the good state of the tooth organization and achieve the effect of improving the quality of medical personnel.

Although the present invention has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the patent application attached hereto.

1: Base

11: Placement Department

12: Sequence marking part

2: The first cutting drill

21: Cutting segment

3: The first deep drill

4: The second deep drill

5: Polished drill

6: Second cutting drill

61: Cutting segment

7: The first grinding drill

8: Second grinding drill

9: Dressing drill

91: End face

T: cover body

Claims (16)

A dental abrasive tool, comprising: a base with several placement parts, a sequence marking part is positioned opposite to at least one placement part; a first cutting drill located in the placement part, the first cutting drill It has a head end, a cutting section is located at the head end, and the length of the cutting section is 12-14 mm; a first deep drilling needle is located at the placing part, and the first deep drilling needle The maximum radial dimension of the blade head is 3~3.5mm; a second deep drilling needle is located in the placement portion, the second deep drilling needle has a blade head, and the maximum radial dimension of the blade head is 7~9mm; and a polishing drill located in the placement portion, the polishing drill has a polishing portion, and the polishing portion is covered by diamond grains with a diameter of 20-30 μm. The dental abrasive tool of claim 1, wherein the placement portions are a plurality of holes, the first cutting drill, the first deep drill, the second deep drill and the polishing drill A joint end is respectively inserted into each of the placing parts. The dental abrasive tool according to claim 1, wherein the sequence marking part is a number. The dental abrasive tool of claim 1, further comprising a cover body coupled to the upper surface of the base to cover the plurality of placement portions. The dental abrasive tool of claim 1, wherein the length of the cutting section of the first cutting drill is 12.5 mm. The dental abrasive tool of claim 1, wherein the first deep drill has a joint end, and the extension length of the blade head of the first deep drill toward the joint end is 5 mm. The dental abrasive tool of claim 1, wherein the second deep drilling needle has a joint end, and the extension length of the blade head of the second deep drilling needle toward the joint end is 8 mm. The dental abrasive tool of any one of claims 1 to 7, further comprising a second A cutting drill pin is located in the placing portion, the second cutting drill pin has a head end, a cutting section is located at the head end, and the length of the cutting section is 7-9 mm. The dental abrasive tool according to any one of claims 1 to 7, further comprising a first grinding drill located in the placement portion, the first grinding drill having a spherical edge portion, and the diameter of the spherical edge portion is 2.5~3.5mm. The dental abrasive tool according to any one of claims 1 to 7, further comprising a second abrasive drill located at the placement portion, the second abrasive drill having a spherical edge portion, and the diameter of the spherical edge portion is 1.5~2.5mm. The dental abrasive tool according to any one of claims 1, 3 to 7, further comprising a dressing drill located at the placement portion, the dressing drill has a dressing end and a joint end, and the dressing end is The diameter of the end face is 0.9~1.5mm, and the circumferential surface of the trimming end extends 0.9~1.5mm from the end face to the joint end of the trimming drill. A method of using a dental abrasive tool, which is used for a dental mold, and is performed by using the dental abrasive tool as claimed in any one of claims 1 to 7, comprising: transversely cutting the cutting section of the first cutting burr A tooth portion is cross-cut by the dental crown to form a broken tooth; continue to use the first deep drill to cut down the cut surface of the broken tooth to a depth of 3~5mm; continue to use the second deep drill to grind The cut surface of the broken tooth is ground downward to a depth of more than 8 mm; and the cut surface of the broken tooth is polished with the polishing drill. A method of using a dental abrasive tool, which is used for a dental mold, and is performed by using the dental abrasive tool as claimed in claim 8, comprising: transversely cutting a tooth portion from a dental crown with the cutting section of the first cutting drill Cross-cut to form a broken tooth; Use the second cutting drill to cut the lingual tooth neck of the broken tooth in the pulp cavity of the tooth; continue to use the first deep drilling drill to cut down the cut surface of the broken tooth to a depth of 3~5mm ; Continue to grind the truncated surface of the broken tooth with the second deep drill to a depth of more than 8 mm; and use the polishing drill to polish the truncated surface of the broken tooth. A method of using a dental abrasive tool, which is used for a dental mold, and is performed by using the dental abrasive tool as claimed in claim 9, comprising: transversely cutting a tooth portion from a dental crown with the cutting section of the first cutting drill Carry out cross-cutting to form a broken tooth; continue to grind the truncated surface of the broken tooth with the first deep drill to a depth of 3~5mm; continue to use the second deep drill to continue the truncated surface of the broken tooth grinding to a depth of more than 8 mm; rough trimming the dentin of the broken tooth section with the first grinding drill; and polishing the truncated surface of the broken tooth with the polishing drill. A method of using a dental abrasive tool, which is used for a dental mold, and is performed by using the dental abrasive tool as claimed in claim 10, comprising: transversely cutting a tooth portion from a dental crown with the cutting section of the first cutting drill Carry out cross-cutting to form a broken tooth; continue to grind the truncated surface of the broken tooth with the first deep drill to a depth of 3~5mm; continue to use the second deep drill to continue the truncated surface of the broken tooth Carry out grinding to a depth of more than 8 mm; use the second grinding drill to perform fine trimming on the sectional surface of the broken tooth; and use the polishing drill to polish the sectional surface of the broken tooth. A method of using a dental abrasive tool, which is used for a dental mold, and is performed by using the dental abrasive tool as claimed in claim 11, comprising: transversely cutting a tooth portion from a dental crown with a cutting section of the first cutting drill make a cross cut to form a break Tooth; continue to grind the cut surface of the broken tooth with the first deep drill to a depth of 3~5mm; continue to grind the cut surface of the broken tooth with the second deep drill to more than 8mm The depth of the broken tooth is polished with the polishing drill; and the polished section surface is trimmed into a plane with the dressing drill.

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