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A kind of micro-anchor nail and correction device containing the micro-anchor nail

An anchorage nail, miniature technology, applied in the field of miniature anchorage nails and orthodontic devices containing the miniature anchorage nails, can solve problems such as circumferential displacement of anchorage nails, poor release of traction force, and reduced effectiveness of orthodontic correction. Achieve the effect of improving circumferential stability and avoiding bad release

Active Publication Date: 2017-06-30
杭州西湖生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, analyzing the structure of the orthodontic miniature self-tapping anchorage nail in the prior art, it is found that there are still the following disadvantages: after the anchorage nail is actually implanted into the compact bone, orthodontic traction is started, and the teeth are pulled together with arch wires and brackets. Connect with the anchorage nail, take the anchorage nail as the fixed point, and use the arch wire to pull the tooth to make it correct
In actual clinical application, it often happens that the entire anchorage nail generates torque due to the force at this place, resulting in circumferential displacement of the anchorage nail, which leads to poor release of traction force and reduces the effectiveness of orthodontic correction

Method used

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  • A kind of micro-anchor nail and correction device containing the micro-anchor nail
  • A kind of micro-anchor nail and correction device containing the micro-anchor nail
  • A kind of micro-anchor nail and correction device containing the micro-anchor nail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0052] The second embodiment is: the circumferential stabilizing grooves 6 are arranged on the tooth forms 8 , 9 , 10 and 11 .

[0053] Certainly, the number of tooth-shaped bodies 11 that screw body 2 is provided with from the top to the tail end is not unique, and can be adjusted as required. Similarly, the position of circumferential stabilizing groove 6 can also be adjusted according to the length of screw body 2, but Always at the tail end of the screw body 2.

[0054] Example 1: The screw main body 2 is provided with 10 conodonts 11 from the top end to the tail end, named respectively as conodonts 1, 2, 3, 4, 5, 6 and 7. , Conodont 8, Conodont 9, and Conodont 10. For the first embodiment, the circumferential stabilizing groove 6 is arranged on the tooth form 8, the tooth form 9 and the tooth form 10;

[0055] Example 2: The screw main body 2 is provided with 12 conodonts 11 from the top end to the tail end, named respectively as conodonts 1, 2, 3, 4, 5, 6 and 7. , Con...

Embodiment 1

[0069] If the first cavity wall 7 actually has the number of effective thread teeth N=3,

[0070] Then the first cavity wall 7 on each conodont 11 is subjected to a force f N =F N / 3=180 / 3=60 grams.

[0071] Assume that the helix angle ∠W=68.04° in this embodiment (according to the M2.0 anchor screw, here is not measured by the diameter of the pitch circle for the time being)

[0072] Then the first cavity wall 7 on each conodont 11 is stressed:

[0073] f P = f N *SIN∠W=60*SIN68.04=55.65 grams

[0074] f S = f N *COS∠W=60*COS68.04=22.44 grams

[0075] shear stress f N The component forces on the first cavity wall 7 and in the normal direction perpendicular to the first cavity wall 7 are respectively f P and f S , in other words, f P The effective shearing force of the first cavity wall 7 on each tooth form 11 to the compact bone when supporting the maximum torsion force of the nail.

[0076] set f wis the shear strength of the implanted part of the compact bone,...

Embodiment 2

[0079] If the actual effective thread thread number N=4 of the first chamber wall 7,

[0080] Then the first cavity wall 7 on each conodont 11 is subjected to a force f N =F N / 4=180 / 4=45 grams.

[0081] Assume that the helix angle ∠W=68.04° in this embodiment (according to the M2.0 anchor screw, here is not measured by the diameter of the pitch circle for the time being)

[0082] Then the first cavity wall 7 on each conodont 11 is stressed:

[0083] f P = f N *SIN∠W=45*SIN68.04=41.74 grams

[0084] f S = f N *COS∠W=45*COS68.04=16.82 grams

[0085] shear stress f N The component forces on the first cavity wall 7 and in the normal direction perpendicular to the first cavity wall 7 are respectively f P and f S , in other words, f P The effective shearing force of the first cavity wall 7 on each tooth form 11 to the compact bone when supporting the maximum torsion force of the nail.

[0086] set f w is the shear strength of the implanted part of the compact bone, wh...

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Abstract

The invention discloses a miniature anchorage nail and an orthodontic device comprising the miniature anchorage nail. The main body of a screw rod is provided with a circumferential stabilizing groove. The circumferential stabilizing groove is arranged on the tail end of the screw main body. The circumferential stability groove includes a first cavity wall, a second cavity wall, and a cavity formed by the first cavity wall and the second cavity wall, and the surface where the first cavity wall of the circumferential stability groove is located is perpendicular to the thread guide of the screw body On the surface where it is located, the length of the cavity is 3 to 4 tooth-shaped body spacings, and the depth is the tooth height. The first cavity wall and the screw body form a rotary cutting angle, and the rotation direction of the rotary cutting angle is related to the rotation of the implanted screw body. in the opposite direction. After the anchorage screw is implanted in the gum, the dense bone grows to fill the circumferential stable groove, so that the implanted micro-anchor screw obtains a circumferential tangential resistance surface, and avoids the phenomenon of circumferential rotational displacement of the implanted micro-anchor screw. The invention can improve the circumferential stability of the micro-anchor nail, and avoid the situation that the bad release of the traction force reduces the correction effect of the deformity.

Description

technical field [0001] The invention belongs to the technical field of orthodontic equipment, and in particular relates to a miniature anchorage nail and an orthodontic device containing the miniature anchorage nail. Background technique [0002] Orthodontics is the treatment of malocclusion of teeth through surgery or orthodontic equipment. Surgical treatment of dental malocclusion is expensive, recovery is slow, and the curative effect is not good, so most patients with dental malocclusion will choose to wear orthodontic equipment to correct dental malocclusion. As one of the commonly used orthodontic devices, micro-anchor nails are widely used. [0003] Traditional micro-anchor nails are divided into cylindrical and conical according to the shape of the implanted part. The implantation process mainly includes the following steps: first make a mucosal incision of several millimeters long at the designed position, then use a suitable drill to open a guide hole in the expo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C7/00
Inventor 茹栋韩天鹏王国庆陈利华狄传亮
Owner 杭州西湖生物材料有限公司
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