Miniscrew

A micro-screw and thread technology, which is applied in the field of micro-screws, can solve problems such as insufficient micro-screws and over-tightening of micro-screws, and achieve the effects of easy processing, guaranteed tightness of joints, and extended service life

Pending Publication Date: 2018-07-06
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But these two kinds of microscrews all have the following shortcoming: because on the head of microscrew, only have only a thin neck and a through hole can be used for connecting and fixing rubber band traction ring, ligature wire and fragment arch wire etc. abnormal accessories, in practical use, often not enough
However, since the cross grooves are perpendicular to each other, when you want to change from one groove to the next, you must turn the microscrew through 90 degrees, which sometimes makes the microscrew too tight

Method used

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Examples

Experimental program
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Effect test

Embodiment approach 1

[0041] A first embodiment of the present invention provides a microscrew, see figure 1 As shown, it includes a head and a plug 1 connected to the head, and the plug 1 is used to implant and fix the microscrew in the patient's alveolar bone;

[0042] Wherein, the head includes a prism 3 with a regular N-sided cross-section, and M top grooves 4 are provided on the bottom surface of the prism 3 opposite to the pin 1, N is a natural number greater than or equal to 3, and M is greater than or equal to A natural number of 3, wherein the included angle between two adjacent top grooves 4 is less than 90 degrees.

[0043] Regarding the values ​​of N and M, in this implementation manner, N may be 6, 8, 10, or 12, etc., and M is equal to N / 2.

[0044] Obviously, both for processing and for the connection with the screwdriver head, when N is an even number, it can be more convenient to design. The higher the number, the closer the head is to a round head, which makes it easier for the hea...

Embodiment approach 2

[0052] The second embodiment of the present invention provides a micro screw. The second embodiment is different from the first embodiment. The main difference is that, in the first embodiment of the present invention, the three top grooves 4 are The three adjacent vertices of the hexagonal prism form a penetration in the direction of the other three vertices corresponding to the three vertices; and in the second embodiment of the present invention, see image 3 As shown, the three top grooves 4 are respectively formed through the direction from the midpoints of the three adjacent sides of the bottom surface of the hexagonal prism to the midpoints of the other three sides corresponding to the three sides.

[0053] It can be seen from the figure that when the top groove 4 has a symmetrical structure, one of the two penetration modes of the first embodiment and the second embodiment can be selected.

[0054] Relatively speaking, in the second embodiment, the M top grooves 4 are ...

Embodiment approach 3

[0056] The third embodiment of the present invention provides a micro screw. The third embodiment is different from the first and second embodiments. The main difference is that in the first and second embodiments of the present invention, only The case where N is greater than or equal to 6 is illustrated, and in the third embodiment of the present invention, see Figure 4 As shown, the present invention will be described by taking N equal to 3 as an example.

[0057] Specifically, in this embodiment, N may be equal to M equal to 3;

[0058] The three top grooves 4 are respectively formed to penetrate from the three vertex angles of the triangular prism to the directions of the three faces corresponding to the three vertex angles.

[0059] When N is equal to 3, prism 3 is a triangular prism. When a triangular prism or a hexagonal prism is used, the tension spring of the triangular head can be used in conjunction with the head, which is very convenient as a supplementary choi...

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Abstract

The invention discloses a miniscrew, belonging to the field of medical instruments. The miniscrew comprises a head and a fastening part connected with the head, wherein the fastening part is used forimplanting and fixing the miniscrew in the alveolar bone of a patient; the head comprises a prism with an N-regular-polygon-shaped cross section; the bottom surface, opposite to the fastening part, ofthe prism is provided with M top grooves; N is a natural number greater than or equal to 3, and M is a natural number greater than or equal to 3; and an included angle between every two adjacent topgrooves is less than 90 degrees. The rotation amount of the miniscrew can be effectively controlled.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a micro screw. Background technique [0002] Microscrew is a commonly used implant in the field of orthodontics. As a temporary device, a microscrew is surgically implanted in a specific position in the patient's mouth, which can provide a specific anchorage for orthodontic treatment and assist in the completion of orthodontic treatment. [0003] In 1997, Kanomi proposed microscrews specifically for orthodontic treatment. In the second year, Costa et al. designed a threaded screw with bracket-like microscrew and began to use it clinically. Since then, microscrews of various designs and details have begun to appear in large numbers, which has promoted the development of clinical applications. [0004] In the Chinese invention patents with the application number CN200320124802.0 and the application number CN201420554684.5, both disclose a micro-screw, which includes: a threade...

Claims

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Application Information

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IPC IPC(8): A61C8/00A61C7/00
CPCA61C7/00A61C8/0096
Inventor 张哲谌钱玉芬余佳梦
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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