Anchorage nail

Abstract

The utility model belongs to the technical field of oral medical instruments, and particularly discloses an anchorage nail. The anchorage nail comprises a nail cap and a nail body, the nail body is provided with external threads and comprises a first cylindrical section, a conical section, a second cylindrical section and a tip which are sequentially connected, the first cylindrical section is connected with the nail cap, the diameter of the second cylindrical section is smaller than that of the first cylindrical section, and the diameter of the end, close to the first cylindrical section, of the conical section is equal to that of the first cylindrical section. The diameter of one end, adjacent to the second cylindrical section, of the conical section is equal to that of the second cylindrical section. The anchorage nail has good tapping performance, and the tip end of the anchorage nail is not prone to breakage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oral cavity medical instrument technical field, concretely relates to a anchorage pin. BACKGROUND

[0002] The anchorage pin is used for implanting the anchorage pin into the bone to resist the reaction force generated by the orthodontic force when the tooth is treated orthodontically. In the related technology, the tip angle of some anchorage pins is too small, in which case, the anchorage pin is easy to attack into the bone tissue, but easy to break. The tip angle of some anchorage pins is large, although it is not easy to break, but it is not easy to attack into the bone tissue. SUMMARY

[0003] The utility model aims at solving one of the technical problems in the related art at least to some extent. For this purpose, the embodiment of the utility model provides an anchorage pin, which can have good attackability and the tip is not easy to break.

[0004] The anchorage pin of the utility model embodiment, including the nail cap and the nail body, the nail body has the outer thread, the nail body includes the first cylinder section, the conical section, the second cylinder section and the tip that connect gradually, the first cylinder section is connected with the nail cap, the diameter of the second cylinder section is less than the diameter of the first cylinder section, and the diameter of the end adjacent to the first cylinder section of the conical section is equal to the diameter of the first cylinder section, the diameter of the end adjacent to the second cylinder section of the conical section is equal to the diameter of the second cylinder section.

[0005] It can be understood that the nail body in the embodiment includes the first cylinder section, the conical section, the second cylinder section and the tip that connect gradually, the tip is sharp and small in size, can be in the case that the angle is set larger, the self attackability of attack into the bone tissue is less affected, and the tip is not easy to break when attacking into the bone tissue. At the same time, the conical section is away from the tip, and the diameter is much larger than the tip, so that the conical section is not easy to break, so that the taper of the conical section can be set smaller to make the conical section have good attackability, and then the conical section can smoothly attack into the bone tissue after the tip enters the bone tissue. And the second cylinder section is gently transitioned between the tip and the conical section, so that the breakage caused by stress concentration due to angle mutation can be avoided.

[0006] In the embodiment, the angle of the tip is 60°-90°.

[0007] In the embodiment, the taper angle of the conical section is 15°-20°.

[0008] In the embodiment, the external thread on the first cylindrical segment is a first thread segment, the external thread on the conical segment, the second cylindrical segment and the tip is a second thread segment, the pitch of the first thread segment is P1, the pitch of the second thread segment is P2, and P1

[0009] In the embodiment, the first thread segment is a multi-start thread.

[0010] In the embodiment, the pitch P1 of the first thread segment is 0.5mm-0.7mm;

[0011] And / or, P2=2P1.

[0012] In the embodiment, the first cylindrical segment has the first thread segment adjacent to one end of the conical segment.

[0013] In the embodiment, the diameter of the first cylindrical segment is D1, and D1 is 1.2mm-2mm.

[0014] In the embodiment, the diameter of the transition segment is D2, and D2=1 / 2D1.

[0015] In the embodiment, the nail cap comprises a head, a neck and a screw cap arranged in sequence, and the screw cap is connected with the nail body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a simplified diagram of the anchorage nail of the embodiment of the utility model.

[0017] Figure 2 is a perspective view of the anchorage nail of the embodiment of the utility model.

[0018] Figure 3 is a side view structural schematic diagram of the anchorage nail of the embodiment of the utility model.

[0019] REFERENCE NUMERALS:

[0020] 1, nail cap; 11, head; 12, neck; 121, through hole; 13, screw cap; 2, nail body; 21, first cylindrical segment; 22, conical segment; 23, second cylindrical segment; 24, tip; 25, first thread segment; 26, second thread segment. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0022] In the embodiment, as Figures 1 to 3As shown, the anchorage nail includes a nail cap 1 and a nail body 2, the nail body 2 has external threads, and the nail body 2 includes a first cylindrical section 21, a conical section 22, a second cylindrical section 23 and a pointed end 24 connected in sequence, the first cylindrical section 21 is connected with the nail cap 1, the diameter of the second cylindrical section 23 is smaller than that of the first cylindrical section 21, and the diameter of the conical section 22 adjacent to one end of the first cylindrical section 21 is equal to that of the first cylindrical section 21, and the diameter of the conical section 22 adjacent to one end of the second cylindrical section 23 is equal to that of the second cylindrical section 23.

[0023] Specifically, the first cylindrical section 21, the conical section 22, the second cylindrical section 23 and the pointed end 24 can be integrally formed, and the nail body 2 and the nail cap 1 can be integrally formed, and the integrally formed structure is beneficial to improve the overall strength.

[0024] It can be understood that the nail body 2 in the embodiment includes the first cylindrical section 21, the conical section 22, the second cylindrical section 23 and the pointed end 24 connected in sequence, the pointed end 24 is sharp and small in size, can be less affected by self-tapping when tapping into bone tissue in the case of a larger angle setting, and can prevent the pointed end 24 from being broken when tapping into bone tissue. At the same time, the conical section 22 is away from the pointed end 24 and has a diameter much larger than that of the pointed end 24, so it is not easy to break, thereby the taper of the conical section 22 can be set smaller to make the conical section 22 have good tapping property, and then the conical section 22 can smoothly tap into the bone tissue after the pointed end 24 enters the bone tissue. And the second cylindrical section 23 smoothly transitions between the pointed end 24 and the conical section 22, which can avoid breaking due to stress concentration caused by sudden change of angle.

[0025] In the embodiment, as shown in the figure, Figure 1 the angle A in the figure is the angle of the pointed end 24, and the angle of the pointed end 24 is 60°-90°.

[0026] For example, the angle of the pointed end 24 can be 60°, 65°, 70°, 75°, 80°, 85° or 90°, etc. If the angle of the pointed end 24 is set too large, the tapping property of the pointed end 24 will be reduced. If the angle of the pointed end 24 is too small, it is easy to break.

[0027] By setting the angle of the pointed end 24 to 60°-90°, the pointed end 24 can have good tapping property and is not easy to break, which is beneficial to ensure the safety and convenience of use.

[0028] In the embodiment, as shown in the figure, Figure 1 the angle B in the figure is the taper angle of the conical section 22. The taper angle of the conical section 22 is 15°-20°.

[0029] For example, the cone angle of the conical segment 22 can be 15°, 16°, 17°, 18°, 19°, or 20°, etc. If the cone angle of the conical segment 22 is too large, a large insertion force is required, and the insertion speed is slow. If the cone angle of the conical segment 22 is too small, the taper of the conical segment 22 is too gentle, and the tissue damage is easily caused by the large friction during removal.

[0030] Understandably, by setting the cone angle of the conical segment 22 to 15° to 20°, the anchorage nail can have good penetration while reducing the damage to bone tissue.

[0031] In this embodiment, as Figure 2 and Figure 3 As shown, the external thread on the first cylindrical section 21 is the first thread section 25, and the external threads on the conical section 22, the second cylindrical section 23 and the tip 24 are the second thread section 26. The pitch of the first thread section 25 is P1, and the pitch of the second thread section 26 is P2, where P1 < P2.

[0032] Understandably, setting the external threads on the conical segment 22, the second cylindrical segment 23, and the tip 24 to the wider pitch of the second thread segment 26 reduces the contact area between the conical segment 22, the second cylindrical segment 23, and the tip 24 and the bone tissue, thereby reducing frictional resistance and facilitating insertion. After the anchorage screw is inserted into the bone tissue, it needs to be tightly bonded to the bone tissue through the first cylindrical segment 21 to improve the stability of the connection. Setting the external threads on the first cylindrical segment 21 to the narrower pitch of the first thread segment 25 increases the contact area between the first cylindrical segment 21 and the bone tissue, resulting in greater friction and thus improving the tightness of the bond with the bone tissue, making the anchorage screw less likely to fall out.

[0033] In this embodiment, the first thread segment 25 is a multi-start thread.

[0034] For example, the first thread segment 25 can be a double-start thread, a triple-start thread, etc. Those skilled in the art can set the number of starts in the first thread segment according to actual needs, and there are no restrictions here.

[0035] Understandably, multi-threaded screws allow the anchorage screw to advance a distance of multiple thread pitches per rotation, which can increase the speed of implantation and removal, as well as increase the contact area with bone tissue, increasing friction and occlusal force, thereby helping to improve fixation and reduce the risk of local stress concentration.

[0036] In this embodiment, the pitch P1 of the first threaded segment 25 is 0.5mm to 0.7mm.

[0037] For example, the first thread segment 25 can have a pitch P1 of 0.5 mm, 0.6 mm, or 0.7 mm. If the pitch P1 of the first thread segment 25 is too large, the contact area between the first thread segment 25 and the bone tissue is reduced, which reduces the initial stability and fixation force. If the pitch P1 of the first thread segment 25 is too small, the rotational resistance is increased, which makes the implantation process more difficult, requires a larger torque, and increases the surgical risk and the discomfort of the patient.

[0038] In this embodiment, the pitch P1 of the first thread segment 25 is set to 0.5 mm to 0.7 mm, which ensures that the anchorage nail can be stably fixed and facilitates the implantation of the anchorage nail, thereby reducing the surgical risk and the discomfort of the patient.

[0039] In this embodiment, P2 = 2P1. Specifically, the second thread segment 26 has a pitch P2 of 1 mm to 1.4 mm. For example, the second thread segment 26 can have a pitch P2 of 1 mm, 1.2 mm, 1.3 mm, or 1.4 mm, etc. If the pitch P2 of the second thread segment 26 is too large, the anchorage nail is more likely to rotate or loosen after implantation. If the pitch P2 of the second thread segment 26 is too small, the difficulty of implanting the anchorage nail is increased.

[0040] In this embodiment, the pitch P2 of the second thread segment 26 is set to 2P1, i.e., P2 is 1 mm to 1.4 mm, which, through the cooperation of the first thread segment 25 and the second thread segment 26, facilitates the implantation of the anchorage nail while improving the stability after implantation.

[0041] In this embodiment, as shown in FIGS. 1 to 3, the first cylindrical segment 21 has the first thread segment 25 adjacent to one end of the conical segment 22. Figure 2 and Figure 3 The first thread segment 25 is adjacent to one end of the conical segment 22.

[0042] Specifically, the first thread segment 25 is adjacent to one end of the conical segment 22, and the other end of the first cylindrical segment 21 adjacent to the screw cap 1 is a smooth segment. It can be understood that, after the anchorage nail is implanted, the smooth segment on the first cylindrical segment 21 is in contact with the gum, and the smooth segment is arranged at this position, which is beneficial to reduce the discomfort.

[0043] In this embodiment, the first cylindrical segment 21 has a diameter D1 of 1.2 mm to 2 mm.

[0044] For example, the diameter D1 of the first cylindrical segment 21 can be 1.2 mm, 1.3 mm, 1.5 mm, 1.8 mm, or 2.0 mm, etc. Those skilled in the art can set the diameter range of the first cylindrical segment 21 as needed, which is not limited herein. If the diameter D1 of the first cylindrical segment 21 is too large, the damage is severe, the discomfort is increased, and the safety is reduced. If the diameter D1 of the first cylindrical segment 21 is too small, it is not conducive to improving the stability of the connection.

[0045] In this embodiment, the diameter D1 of the first cylindrical segment 21 is set to 1.2-2 mm, which can improve the stability of the connection, reduce the damage to the bone tissue, reduce the discomfort of the patient, and improve the safety.

[0046] In this embodiment, the diameter of the transition segment is D2, and D2=1 / 2D1.

[0047] Specifically, the diameter D2 of the transition segment is 0.6-1 mm. For example, the diameter D2 of the transition segment can be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm, etc. If the diameter of the transition segment is too large or too small, the length of the conical segment 22 in the axial direction will be too short or too long if the diameter of the first cylindrical segment 21 and the taper of the conical segment 22 remain unchanged. If the conical segment 22 is too long, the length of the first cylindrical segment 21 will be shortened if the total length of the anchorage peg remains unchanged, which is not conducive to improving the stability of the connection. If the conical segment 22 is too short, it is not conducive to the penetration of the anchorage peg.

[0048] In this embodiment, by setting the diameter D2 of the transition segment to 1 / 2D1, the anchorage peg is beneficial to have good penetration and maintain stability after implantation through the cooperation with the first cylindrical segment 21.

[0049] In this embodiment, as shown in Figures 1 to 3 The cap 1 includes a head 11, a neck 12, and a screw cap 13 arranged in sequence, and the screw cap 13 is connected to the peg body 2.

[0050] Specifically, the neck 12 is provided with a through hole 121 extending in the radial direction of the neck 12. The through hole 121 is used for knotting the orthodontic wire or other orthodontic instruments thereon to provide orthodontic traction. The outer diameters of the head 11 and the screw cap 13 are both larger than the outer diameter of the neck 12, and the outer diameter of the screw cap 13 is larger than the outer diameter of the first cylindrical segment 21. By setting the outer diameter of the neck 12 to be smaller, the orthodontic wire or other orthodontic instruments can be connected to the neck 12, thereby facilitating the connection of the orthodontic wire or other orthodontic instruments to the anchorage peg. By setting the outer diameter of the screw cap 13 to be larger, the anchorage peg can be limited by the screw cap 13 to prevent the anchorage peg from being implanted too deeply, so as to facilitate the removal of the anchorage peg later.

[0051] The end of the head 11 away from the neck 12 is provided with a smooth spherical surface. By setting the end of the head 11 away from the neck 12 as a smooth spherical surface, the smooth spherical surface can reduce the friction and contact area with the surrounding soft tissue, thereby reducing the irritation and potential damage to these tissues to reduce the pain and discomfort of the patient.

[0052] The embodiment sets the nut 13, can limit the support nail, prevent the support nail from being implanted too deep, so as to facilitate the support nail to be taken out in the later period. The neck 12 is arranged between the nut 13 and the head 11, the support nail is connected with the orthodontic instrument such as the orthodontic wire through the neck 12, and the connection of the orthodontic instrument such as the orthodontic wire and the support nail can be facilitated.

[0053] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0054] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0055] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0056] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0057] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0058] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A anchorage pin, characterized in that, The application relates to a nail, which comprises: a nail cap; a nail body with external threads, the nail body comprising a first cylindrical section, a conical section, a second cylindrical section and a pointed end connected in sequence, the first cylindrical section being connected with the nail cap, the diameter of the second cylindrical section being smaller than that of the first cylindrical section, and the diameter of the conical section adjacent to one end of the first cylindrical section being equal to that of the first cylindrical section, and the diameter of the conical section adjacent to one end of the second cylindrical section being equal to that of the second cylindrical section.

2. The anchorage peg of claim 1, wherein The angle of the pointed end is 60-90 degrees.

3. The anchorage peg of claim 1, wherein The taper angle of the conical section is 15-20 degrees.

4. The anchorage peg of claim 1, wherein The external threads on the first cylindrical section are a first thread section, the external threads on the conical section, the second cylindrical section and the pointed end are a second thread section, the pitch of the first thread section is P1, the pitch of the second thread section is P2, and P1 5. The anchorage peg of claim 4, wherein The first thread section is a multi-threaded thread.

6. The anchorage peg of claim 4, wherein The pitch P1 of the first thread section is 0.5-0.7 mm. And / or, P2=2P1.

7. The anchorage peg of claim 4, wherein The first cylindrical section has the first thread section adjacent to one end of the conical section.

8. The anchorage peg of claim 1, wherein The diameter of the first cylindrical section is D1, and D1 is 1.2-2 mm.

9. The anchorage peg of claim 8, wherein The diameter of the transition section is D2, and D2=1 / 2D1.

10. The anchorage peg of claim 1, wherein The nail cap comprises a head, a neck and a screw cap arranged in sequence, and the screw cap is connected with the nail body.

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