CN209847417U - Tooth root marrow cutter - Google Patents

Abstract

The utility model discloses a tooth root marrow cutter relates to the apparatus field, solves through current apparatus live pulp cutting operation easily remain infect the pulpal tissue, easily injure the problem of being close to the healthy pulpal tissue of apical periphery. The utility model adopts the technical proposal that: tooth root marrow cutter, including the needle body, the handle is connected to the one end of needle body, and the other end of needle body is the working end, and the working end of needle body is crooked to be the dog-ear, and the distal end of dog-ear is the cutting section, and the cutting section sets up the cutting edge, and the near-end of dog-ear is the burr section, and the outside of burr section is provided with the burr. The working end of the needle body can extend into the medullary cavity depth which can not be reached by the ball drill and the digging spoon, so that the infected pulp tissue at the deep part is separated from the healthy living marrow and taken out, and the healthy living marrow at the apical part in the root canal is reserved. The tooth root pulp cutter can be used for removing the pulp tissue of the crown part in the root canal of the open permanent tooth of the apical pore, and the completeness of the pulp tissue of the apical part in the root canal and the tissue around the apical part is ensured; and the separation section is smooth, thereby being beneficial to the subsequent treatment of the marrow capping.

Description

Tooth root marrow cutter

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a surgical instrument for cutting off and taking out the living marrow of a coronary fracture permanent tooth.

Background

Trauma and coronary fracture of young permanent anterior teeth is a common clinical accident. Coronal pulp exposure can easily lead to infection of the pulp tissue in the coronal section, which can progress over time to the pulp in the root section, eventually leading to necrosis of the entire pulp. For teeth with a root that has not yet fully developed, the root continues to develop relying on healthy living marrow. Therefore, it is important to preserve the living pulp of the injured tooth, and the purpose of maintaining the vitality of the root pulp and promoting the root to continue to develop should be achieved during the treatment.

Live-myeloablation is a method of removing infected pulp at the crown and retaining healthy pulp at the root with an instrument, and is currently the most effective treatment method. For light permanent teeth of the last year, infected coronal pulp may be removed using a bulb or a curette. The working end of the ball drill is a sphere with a multi-edge, the cutting surface is a concave surface, and the rotating speed is adjusted by a mobile phone to cut off and remove dental pulp tissues close to the crown. The digging spoon consists of a handle and two working ends, wherein the working ends are spoon-shaped and can also cut off dental pulp tissues close to the crown. However, both the bulb drill and the curette are unable to remove any infected or necrotic pulp tissue at the deep site due to the limited length of the instrument that extends into the root canal.

When the infection exceeds the depth that can be reached by a bulb and a spoon, a broach will often be used clinically to remove the infected pulp tissue. The working end of the medullary needle is flat and straight, the surface of the working end is provided with a plurality of tiny barbs, when in use, the working end is inserted into a root canal, the root canal marrow is wound on the medullary needle by rotation, and then the root canal marrow is slowly drawn out. The broach can be used to remove pulp when the apical foramen is closed, but pulp tissue near the apical part of the root canal is mostly left when the broach is applied to young and permanent teeth with the apical foramen not closed. Since the pulp tissue and periapical tissue are not separated, the periapical tissue is pulled out together when the pulp is extracted by rotating the pulp extracting needle, and not only the infected pulp tissue cannot be completely removed but also the healthy pulp tissue near the periapical tissue is damaged. Thus, the use of a broach does not provide a good solution to the problem of removing deeply infected pulp tissue.

According to the above analysis, the conventional bulb drill or spoon for storing living pulp cannot remove the infected pulp tissue in the deep part because the length of the bulb drill or spoon extending into the root canal is limited. When the pulp extracting needle is used for removing infected pulp tissues, pulp tissues and periapical tissues of a patient with an unclosed apical foramen are not separated, and when the pulp extracting needle is used for rotating and extracting pulp, not only the infected pulp tissues can not be completely removed, but also healthy pulp tissues close to the periapical periphery can be damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tooth root marrow cutter, which solves the problems that the pulp tissue is easy to remain and infect and the healthy pulp tissue near the root tip periphery is easy to be damaged when the pulp cutting operation is carried out by the prior apparatus.

The utility model provides a technical scheme that its technical problem adopted is: tooth root marrow cutter, including the needle body, the handle is connected to the one end of needle body, and the other end of needle body is the working end, and the working end of needle body is crooked to be the dog-ear, and the distal end of dog-ear is the cutting section, and the cutting section sets up the cutting edge, and the near-end of dog-ear is the burr section, and the burr section is provided with the burr. Wherein, the bevel has two sides, and the distal end of the bevel is the side where the working end of the needle body is located.

Specifically, the method comprises the following steps: the length of the cutting section is 0.1-1.0 mm, and the length of the burr section is 10-15 mm.

Specifically, the method comprises the following steps: the needle body is made of stainless steel.

Specifically, the method comprises the following steps: the folding angles of the needle body are connected in an arc way.

Specifically, the method comprises the following steps: the cutting section and the burr section are perpendicular to each other.

Specifically, the method comprises the following steps: the direction of the cutting edge is mutually vertical to the axial direction of the needle body.

The tooth root pulp cutter is used, a handle is held to go deep into a root canal of a diseased tooth, after a cutting edge reaches the estimated cutting depth, the tooth root pulp cutter starts to rotate for a circle along the direction vertical to the long axis of a tooth body, the pulp part needing to be cut in the root canal is separated from the pulp part needing to be reserved, the cut pulp is wound outside a burr section through rotation, and the tooth root pulp cutter is pulled out to finish the operation.

The utility model has the advantages that: the working end of the needle body of the tooth root pulp cutter can extend into the pulp cavity depth which can not be reached by the bulb drill and the digging spoon, thereby separating the infected pulp and the healthy pulp in the deep part of the root canal and keeping the healthy and alive pulp at the root tip part in the root canal. The tooth root pulp cutter can be used for permanent teeth with open apical foramen, and can cut off the connection between root canal coronal infected pulp tissue and root healthy pulp tissue, so that the integrity of the root healthy pulp tissue is ensured, and the defect of a common broach is overcome; and the cutting section of the needle body is provided with a cutting edge, so that the separation section is smooth, and the subsequent pulp covering is facilitated.

Drawings

Fig. 1 is a schematic structural view of the dental root pulp cutter of the present invention.

Reference numerals: the needle body 1, the cutting section 11, the burr section 12, the handle 2.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figure 1, the utility model relates to a tooth root marrow cutter, which comprises a needle body 1, one end of the needle body 1 is connected with a handle 2, and the other end of the needle body 1 is a working end. The handle 2 is used for holding, can be detachably connected with the needle body 1, and can also be integrated with the needle body 1. The outer side of the handle 2 is provided with anti-skid grains, and the shape of the handle 2 is convenient for holding. The needle body 1 and the handle 2 are both preferably made of stainless steel materials, so that the disinfection is convenient.

The bending of the working end of the needle body 1 is a break angle, the break angle comprises two edges, the two edges are respectively called the far end of the break angle and the near end of the break angle, the far end of the break angle is one edge where the end head of the working end of the needle body is located, the far end of the break angle is a cutting section 11, the near end of the break angle is a burr section 12, the burr section 12 is provided with burrs, and the burrs are arranged on the whole burr section. The working end is bent at a break angle, the angle between the cutting section 11 and the burr section 12 preferably being around 90 degrees, for example 90 ° ± 20 °. The cutting section 11 and the burr section 12 are connected by an arc, the radius of the arc is as small as possible, and the healthy dental pulp tissue and periapical tissue are prevented from being injured. The cutting section 11 is provided with a cutting edge, so that the working end can conveniently go deep into the pulp cavity to separate infected pulp tissues from healthy pulp, the direction of the cutting edge of the cutting section 11 is vertical to the axial direction of the needle body 1, and the whole cutting section 11 is provided with the cutting edge, so that the separation section is flat. Wherein the needle body 1 is axially in the axial direction of the main part of the needle body 1, i.e. the part not comprising the cutting segment 11.

The diameter of the root canal is approximately 0.2-2.0 mm, so the length of the cutting segment 11 is 0.1-1.0 mm. For example, when the pulp of the maxillary middle incisor tooth from the enamel cementum border to the root apex 3/4 root canal (diameter: 1.5mm) is removed, a dental root-pulp cutter having a cutting segment 11 with a length of 0.75mm is preferably selected. The depth of the root canal is approximately 10 to 15mm, so the length of the burr section 12 is 10 to 15 mm.

Claims (6)

1. Tooth root marrow cutter, including needle body (1), handle (2) are connected to the one end of needle body (1), and the other end of needle body (1) is the working end, its characterized in that: the bending of the working end of the needle body (1) is a bevel, the far end of the bevel is a cutting section (11), the cutting section (11) is provided with a cutting edge, the near end of the bevel is a burr section (12), and the burr section (12) is provided with burrs.

2. The tooth root pulp cutter according to claim 1, wherein: the length of the cutting section (11) is 0.1-1.0 mm, and the length of the burr section (12) is 10-15 mm.

3. The tooth root pulp cutter according to claim 1, wherein: the needle body (1) is made of stainless steel.

4. The tooth root pulp cutter according to claim 1, wherein: the folding angles of the needle body (1) are connected in a circular arc manner.

5. The dental root pulp cutter as claimed in any one of claims 1 to 4, wherein: the cutting section (11) and the burr section (12) are perpendicular to each other.

6. The tooth root pulp cutter according to claim 5, wherein: the direction of the cutting edge is mutually vertical to the axial direction of the needle body (1).