CN102475586A - Implant protecting device with overload protection - Google Patents
Implant protecting device with overload protection Download PDFInfo
- Publication number
- CN102475586A CN102475586A CN2010105534308A CN201010553430A CN102475586A CN 102475586 A CN102475586 A CN 102475586A CN 2010105534308 A CN2010105534308 A CN 2010105534308A CN 201010553430 A CN201010553430 A CN 201010553430A CN 102475586 A CN102475586 A CN 102475586A
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- CN
- China
- Prior art keywords
- connector
- implant
- connecting body
- cervical region
- slide block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an implant protecting device with overload protection. The device comprises an implant, an upper connecting body, a lower connecting body, a spherical slide block, a compression nut and an artificial limb jointing tube, wherein the contact face between the upper connecting body and the lower connecting body is a spherical face; the contact face between the spherical slide block and the lower connecting body is the spherical face concentric with the contact face between the upper connecting body and the lower connecting body; the upper connecting body and the lower connecting body are connected through the spherical slide block and the compression nut; and the friction torque of the contact face between the upper connecting body and the lower connecting body is less than the permissible bending torque of the neck part of an extended end of the implant. The device has an overload skid function. When an external force applied to the artificial limb exceeds a limit value, certain relative slide is caused between the artificial limb and the implant, so the implant and a stump bone are prevented from being damaged.
Description
Technical field
The invention belongs to biomedical engineering field, concrete relate to a kind of implant preventer with overload protection.
Background technology
Existing conventional prosthesis will connect couplet through a receptive cavity and the artificial limb processed by resin material that matches with patient's deformed limb; Artificial limb is through soft tissue and receptive cavity power transmission; Do not meet the body biomechanics rule, because the breathability of receptive cavity is poor, interface environments is abominable; Deformed limb skin subject to damage, and because receptive cavity must be often changed in the deformed limb amyotrophy.Bone implanted artificial limb is a kind of new technique in artificial limb assembling field; This assembly method does not need receptive cavity; In amputation; An implant of being processed by the biocompatible metal material is implanted in the stump bone, realized that bone property is strong to close, the other end of implant is done the percutaneous sealing and is stretched out and externally be connected with artificial limb.Also oneself tries out the present report that has only Sweden that this artificial limb is arranged in the world clinically, but owing on the structural design of connector, do not consider the overload protection problem, receives that when artificial limb external force is done the time spent greatly, and implant often bends and ruptures.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, purpose is to solve existing bone implantable prosthetic is not considered overload protection on structural design problem, and a kind of implant preventer with overload protection is provided.
Technical scheme of the present invention is: a kind of implant preventer with overload protection; Comprise the implant that connects successively, last connector, following connector, sphere slide block and clamp nut; And be fixed on the artificial limb connecting tube on the said down connector; It is characterized in that: the said contact surface of going up connector and following connector is a sphere; Said sphere slide block with the following contact surface of connector is and the concentric sphere of connector contact surface up and down, through sphere slide block and clamp nut up and down connector couple together, and about making the moment of friction between the connector contact surface less than the bending moment allowable of implant external part cervical region.
The said diameter d that goes up the connector cervical region
2Diameter d less than implant external part cervical region
1, and going up the allowable bending moment of the bending moment allowable of connector cervical region less than implant external part cervical region, said moment of friction between the connector contact surface up and down is less than the bending moment allowable of last connector cervical region.
Implant protector according to the invention has the overload function of skidding, and when external force that artificial limb receives surpasses limit value, produces a certain amount of relative slip between artificial limb and the implant, thereby can protect implant and deformed limb bone to exempt from destruction.
Description of drawings
Fig. 1 is the structural representation of implant protector of the present invention.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
As scheme shown in the l; Implant protector according to the invention comprises the implant 1 that connects successively, last connector 2, following connector 3, sphere slide block 4 and clamp nut 5; And be fixed on the artificial limb connecting tube 6 on the said down connector 3; The upper end of last connector 2 is provided with interior hexagonal hole; Should in hexagonal hole be used for being connected with outer six square toes of implant 1 external part, the hole wall of interior hexagonal hole has a cannelure, the ear end through last connector end is with the outer six square toes clamping of bolt with implant 1 external part.The lower end of last connector 2 is that radius is the hemispherical head of R: the upper end of following connector 3 is that the ball-and-socket of R contacts with the concentric bulb of last connector 2 for radius; Connector is connected with clamp nut 5 through spherical slide block 4 up and down; The sphere on the sphere slide block 4 and the sphere of last connector are a homocentric sphere face; Regulate the pressure between the connector ball type of contact surface up and down through clamp nut 5, make the moment of friction that produces between contact surface bending moment allowable, simultaneously also less than the bending moment allowable of last connector 2 cervical regions less than implant 1 external part cervical region.When implant and last connector employing same material, the diameter d of last connector cervical region
2Be less than the diameter d of implant external part cervical region
1Thereby, make and go up the allowable bending moment of the bending moment allowable of connector cervical region less than the external part cervical region.Therefore, do the time spent when the bone implantable prosthetic receives big external force, the ball type of contact surface of connector at first skids up and down, thereby has both protected implant also to protect last connector to make it exempt from bending failure.
Claims (1)
1. implant preventer with overload protection; Comprise the implant that connects successively, last connector, following connector, sphere slide block and clamp nut; And be fixed on the artificial limb connecting tube on the said down connector; It is characterized in that: the said contact surface of going up connector and following connector is a sphere; Said sphere slide block with the following contact surface of connector is and the concentric sphere of connector contact surface up and down, through sphere slide block and clamp nut up and down connector couple together, and about making the moment of friction between the connector contact surface less than the bending moment allowable of implant external part cervical region; The said diameter d that goes up the connector cervical region
2Diameter d less than implant external part cervical region
1, and going up the allowable bending moment of the bending moment allowable of connector cervical region less than implant external part cervical region, said moment of friction between the connector contact surface up and down is less than the bending moment allowable of last connector cervical region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105534308A CN102475586A (en) | 2010-11-22 | 2010-11-22 | Implant protecting device with overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105534308A CN102475586A (en) | 2010-11-22 | 2010-11-22 | Implant protecting device with overload protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102475586A true CN102475586A (en) | 2012-05-30 |
Family
ID=46088445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105534308A Pending CN102475586A (en) | 2010-11-22 | 2010-11-22 | Implant protecting device with overload protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102475586A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9526488B2 (en) | 2013-03-15 | 2016-12-27 | Smith & Nephew, Inc. | Fenestrated locking suture anchor assembly |
| US9775702B2 (en) | 2010-03-10 | 2017-10-03 | Smith & Nephew, Inc. | Composite interference screws and drivers |
| US9788828B2 (en) | 2013-03-15 | 2017-10-17 | Smith & Nephew, Inc. | Miniaturized dual drive open architecture suture anchor |
| US9808337B2 (en) | 2010-03-10 | 2017-11-07 | Smith & Nephew, Inc. | Composite interference screws and drivers |
| US9808298B2 (en) | 2013-04-09 | 2017-11-07 | Smith & Nephew, Inc. | Open-architecture interference screw |
| US9901355B2 (en) | 2011-03-11 | 2018-02-27 | Smith & Nephew, Inc. | Trephine |
-
2010
- 2010-11-22 CN CN2010105534308A patent/CN102475586A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9775702B2 (en) | 2010-03-10 | 2017-10-03 | Smith & Nephew, Inc. | Composite interference screws and drivers |
| US9788935B2 (en) | 2010-03-10 | 2017-10-17 | Smith & Nephew, Inc. | Composite interference screws and drivers |
| US9808337B2 (en) | 2010-03-10 | 2017-11-07 | Smith & Nephew, Inc. | Composite interference screws and drivers |
| US9901355B2 (en) | 2011-03-11 | 2018-02-27 | Smith & Nephew, Inc. | Trephine |
| US9526488B2 (en) | 2013-03-15 | 2016-12-27 | Smith & Nephew, Inc. | Fenestrated locking suture anchor assembly |
| US9788828B2 (en) | 2013-03-15 | 2017-10-17 | Smith & Nephew, Inc. | Miniaturized dual drive open architecture suture anchor |
| US9808298B2 (en) | 2013-04-09 | 2017-11-07 | Smith & Nephew, Inc. | Open-architecture interference screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120530 |