CN201248761Y - Medical self-drilling self-tapping fixing spicule - Google Patents
Medical self-drilling self-tapping fixing spicule Download PDFInfo
- Publication number
- CN201248761Y CN201248761Y CNU2008200685117U CN200820068511U CN201248761Y CN 201248761 Y CN201248761 Y CN 201248761Y CN U2008200685117 U CNU2008200685117 U CN U2008200685117U CN 200820068511 U CN200820068511 U CN 200820068511U CN 201248761 Y CN201248761 Y CN 201248761Y
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- tapping
- self
- blade
- spicule
- fixed bone
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Abstract
A medical self-drilling self-tapping fixing spicule comprises a drill head cutting edge part (1) at end part, a cylinder part (2) at middle part and an interface part (3) at tail, which are integrated, wherein the drill head cutting edge part (1) comprises a drill head cutting edge (11), a tapping cutting edge (12) and a fixing screw (13), the tapping cutting edge (12) is provided between the drill head cutting edge (11) and the fixing screw (13), the tapping cutting edge (12) has a low flat drill head cutting edge (11) gradually transitioned to the cutting edge same as the fixing screw (13). The medical self-drilling self-tapping fixing spicule overcomes the defects of the prior spicule surgery such as complex process, difficult operation, increased surgery time and increased bleeding condition. The medical self-drilling self-tapping fixing spicule can complete drilling, tapping and fixing spicule in one time.
Description
Technical field
This utility model relates to the fixed bone spicule that medical bone external fixator uses, and more particularly it is a kind of medical self-drilling self-tapping fixed bone spicule.
Background technology
The employed fixed bone spicule of existing medical bone external fixator must be used bit bore in advance, and then use the special screw tap tapping supporting with spicule on bone when operation is installed, could install and fix spicule at last on bone.Such mode makes the operation process complexity, operation inconvenience, the hemorrhage of operating time and sufferer all increases to some extent, in the process of boring, the high heat that the high speed rotating of drill bit and violent friction bring causes the probability of head necrosis to increase, cause the fixing not firm or fixedly failure of fixed bone spicule, and operation repeatedly might cause the secondary injury to the patient.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned existing disadvantages of background technology part, and a kind of medical self-drilling self-tapping fixed bone spicule is provided.It is the installation that once-through operation just can be finished boring, tapping and fixed bone spicule, and the blade of boring of suitable low speed and tapping avoids causing because of the high heat that high speed rotating and violent friction bring the possibility of head necrosis.
The purpose of this utility model reaches by following measure: medical self-drilling self-tapping fixed bone spicule, it comprises end drill bit knife edge part, middle part barrel portion, the end interfaces part that is integral structure, it is characterized in that described bit wing blade branch comprises bit wing sword, tapping blade and retaining thread, the tapping blade is between drill bit blade and retaining thread, and the shape of tapping blade is to carry out the transition to the blade identical with retaining thread gradually from low flat drill bit blade.
In technique scheme, described drill bit blade comprises two transition faces, two pairs of blades, two chip areas, and transition face, chip area, blade be arranged clockwise successively, wherein the angle α between two blades be 89 ° 36 '-91 ° 15 '.
In technique scheme, on described tapping blade, have two helical angles and be 83 ° chip area, described chip area connects to the drill bit blade.
In technique scheme, described retaining thread is to be parabola by cusp, is hyperbola at the bottom of the tooth, and the transition face at the bottom of cusp and the tooth is the channel section that arc surface constitutes.
In technique scheme, be distributed with the annular staff gauge reticle of some, fixed interval on the barrel portion in the middle part of described being positioned at.
In technique scheme, the power interface draw-in groove of fixed bone spicule is arranged on the interface section of described tail end.
In technique scheme, the power interface of fixed bone spicule is arranged on the interface section of described tail end, described power interface is positioned at the rear of power interface draw-in groove.
1., two boring blade suitable angles this utility model fixed bone spicule has following advantage:, its configuration design is suitable on bone low speed boring to be avoided producing too much bone bits and heat, prevents that Yin Gaowen from osteonecrosis taking place.2., the tapping blade by low flat blade gradually transition be the blade identical with retaining thread, effectively reduce the required moment of torsion of tapping, avoid producing too much heat, prevent Yin Gaowen generation osteonecrosis.3., two chip areas that are symmetrically distributed with helical angle that are arranged on the tapping knife edge part are suitable for the low speed tapping for the tapping blade provides suitable blade anterior angle, and can effectively get rid of the bone bits that boring and tapping produce, prevent that moment of torsion from increasing, required axial force and the moment of torsion of installation spicule reduced significantly, avoid taking place folder pin, disconnected sword and bone is caused the secondary injury, avoid producing too much heat, prevent that Yin Gaowen from osteonecrosis taking place.4., retaining thread constitutes the U-shaped screw thread by curve, such section makes stress concentration greatly reduce, and has improved the intensity of fixed bone spicule, has effectively prevented the broken needle that takes place under regular service conditions; This U-shaped screw thread is when guaranteeing spicule intensity simultaneously, spicule and bone contact area have been increased again, make spicule stress distribution the best in bone, therefore the anchoring condition of spicule is greatly improved, improved the anchor force of fixed bone spicule, make fixed bone spicule be fit to long-term the indwelling, avoid taking place loosening phenomenon.5., fixed bone spicule be clamped and connected the part be slick periphery, diameter all is fit to be connected easily with the bone external fixator and adjust with length, guarantees powerful chucking power, improved chucking power and the use flexibility ratio.6., the part that is clamped and connected of fixed bone spicule is carved with several fixedly annular staff gauge reticles of unit gap, be convenient in operation, in time measure the degree of depth that fixed bone spicule inserts, prevent that effectively fixed bone spicule from inserting the soft tissue injury of taking an advanced study into offside, also can avoid using too much the injury of X-ray irradiation simultaneously hospitalized patients.7., the power interface draw-in groove of fixed bone spicule is the endless groove of circular arc, can be easily and fast from the supporting power chuck loading and unloading of fixed bone spicule and prevent that spicule from coming off, effectively simplified the structure of power chuck.8., the power interface of fixed bone spicule is the transmission of power interface of fixed bone spicule rotation and pressurization, is distributed in the plane that periphery extends vertically by one or several and forms, its quantity is definite according to the diameter and the purposes of fixed bone spicule.Can transmit moment of torsion and plus-pressure with closely cooperating, make fixed bone spicule pressurization rotation, be convenient to that fixed bone spicule is holed, tapping on bone, make retaining thread enter bone fixation smoothly simultaneously with the supporting power chuck of fixed bone spicule.
Description of drawings
Fig. 1 is the overall structure sketch map of this utility model medical self-drilling self-tapping fixed bone spicule.
Fig. 2 is the boring blade side schematic view of this utility model medical self-drilling self-tapping fixed bone spicule.
Fig. 3 is the head construction (comprising boring blade, tapping blade, chip area and retaining thread) of this utility model medical self-drilling self-tapping fixed bone spicule.
Fig. 4 is this utility model medical self-drilling self-tapping fixed bone spicule boring blade end face sketch map.
Fig. 5 is that the supporting of this utility model medical self-drilling self-tapping fixed bone spicule uses constitutional diagram with bitbrace, fixed bone spicule chuck and fixed bone spicule.
1. drill bit knife edge parts (end) among the figure, 2. barrel portion (middle part), 3. interface section (tail end), 7. power interface draw-in groove, 8. power interface, 11. drill bit blades, 12. tapping blades, 13. retaining threads, 21. annular staff gauge reticle, 111. blades, 121. chip areas, 131. transition faces.
The specific embodiment
Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not constitute to qualification of the present utility model, only do for example.By explanation advantage of the present utility model, will become clear more and easy and understand simultaneously.
Consult accompanying drawing as can be known: this utility model medical self-drilling self-tapping fixed bone spicule, it comprises end drill bit knife edge part 1, middle part barrel portion 2, the end interfaces part 3 that is integral structure, drill bit knife edge part 1 comprises drill bit blade 11, tapping blade 12 and retaining thread 13, tapping blade 12 is between drill bit blade 11 and retaining thread 13, and the shape of tapping blade 12 is to carry out the transition to the blade (as shown in Figure 1) identical with retaining thread 13 gradually from low flat drill bit blade 11.Drill bit blade 11 comprises two transition faces 131, the two pairs of blades 111, two chip areas 121, and transition face 131, chip area 121, blade 111 be arranged clockwise successively, wherein the angle α between two blades 111 be 89 ° 36 '-91 ° 15 '.Have two helical angles on the tapping blade 12 and be 83 ° chip area 121, described chip area 121 connects to drill bit blade 11.Retaining thread 13 is to be parabola by cusp, is hyperbola at the bottom of the tooth, and the transition face at the bottom of cusp and the tooth is the channel section that arc surface constitutes.Be distributed with the annular staff gauge reticle 21 of some, fixed interval on the barrel portion 2 in the middle part of being positioned at.The power interface draw-in groove 7 that fixed bone spicule is arranged on the interface section 3 of tail end.The power interface 8 that fixed bone spicule is arranged on the interface section 3 of tail end, described power interface 8 are positioned at the rear (as Fig. 2, Fig. 3, shown in Figure 4) of power interface draw-in groove 7.
Medical self-drilling-self-tapping fixed bone spicule is characterized in that whole spicule structure is made of three parts, 1. drill bit knife edge part (end), 2. barrel portion (middle part), 3. interface section (tail end).
Medical self-drilling self-tapping fixed bone spicule drill bit knife edge part (end) is made of three parts, drill bit blade 11, tapping blade 12 and retaining thread 13.Drill bit blade 11 at fixed bone spicule foremost, design have two knife edge included angles be 89 ° 36 '-91 ° 15 ', and the configuration design of bit part is suitable on bone low speed boring.Tapping blade 12 is at the rear portion of drill bit blade 11, design has the tapping blade 12 that is complementary with spicule retaining thread 13, the shape of tapping blade 12 is to carry out the transition to gradually and the identical blade of spicule screw thread from relatively lower flat blade, so that finish tapping smoothly, the tapping knife edge part also symmetry to have two helical angles be 83 ° chip area 121; The effect of these two chip areas 121 has two: the bone chips that one is used to hole and produces when getting rid of the blade cutting tapping time, it two provides suitable anterior angle for the tapping blade.Retaining thread partly is in the rear portion of tapping blade, is produced by tapping blade continuous transition, forms complete retaining thread 13; Retaining thread 13 is to be parabola by cusp, is hyperbola at the bottom of the tooth, and the transition face at the bottom of cusp and the tooth is the channel section that arc surface constitutes.
The barrel portion of medical self-drilling self-tapping fixed bone spicule (middle part) is made of slick periphery, it is the part that is clamped and connected of spicule and bone external fixator, be distributed with some, the annular staff gauge reticle 21 of 10mm at interval on it, the distribute middle part of whole fixed bone spicule of retaining part.
Medical self-drilling self-tapping fixed bone spicule interface section (tail end) is made of two parts.Power interface draw-in groove 7, power interface 8.Power interface draw-in groove 7 is in order firmly to connect a required cannelure around the spicule afterbody of power chuck, in order to spicule closely and easily is connected with manual turning handle; Power interface 8 is to leave one or several planes on the cylindrical surface of spicule tail end in order to transmit axial force and moment of torsion, makes spicule pressurization rotation, finishes boring, tapping and fixes (as shown in Figure 5).
This utility model medical apparatus and instruments clinical experiment report:
Claims (7)
1, medical self-drilling self-tapping fixed bone spicule, it comprises the end drill bit knife edge part (1) that is integral structure, the barrel portion (2) at middle part, the interface section (3) of tail end, it is characterized in that described drill bit knife edge part (1) comprises drill bit blade (11), tapping blade (12) and retaining thread (13), tapping blade (12) is positioned between drill bit blade (11) and the retaining thread (13), and the shape of tapping blade (12) is to carry out the transition to gradually and the identical blade of retaining thread (13) from low flat drill bit blade (11).
2, medical self-drilling self-tapping fixed bone spicule according to claim 1, it is characterized in that described drill bit blade (11) comprises two transition faces (131), two pairs of blades (111), two chip areas (121), transition face (131), chip area (121), blade (111) be arranged clockwise successively, and wherein the angle α between two blades (111) is 89 ° of 36 ＇-91 ° of 15 ＇.
3, medical self-drilling self-tapping fixed bone spicule according to claim 1 is characterized in that having two helical angles and is 83 ° chip area (121) on described tapping blade (12), described chip area (121) connects to drill bit blade (11).
4, medical self-drilling self-tapping fixed bone spicule according to claim 1 is characterized in that described retaining thread (13) is is parabola by cusp, is hyperbola at the bottom of the tooth, and the transition face at the bottom of cusp and the tooth is the channel section that arc surface constitutes.
5, medical self-drilling self-tapping fixed bone spicule according to claim 1 is characterized in that being distributed with the annular staff gauge reticle (21) of some, fixed interval on the described barrel portion (2) that is positioned at the middle part.
6, medical self-drilling self-tapping fixed bone spicule according to claim 1 is characterized in that having on the interface section (3) of described tail end the power interface draw-in groove (7) of fixed bone spicule.
7, medical self-drilling self-tapping fixed bone spicule according to claim 6 is characterized in that having on the interface section (3) of described tail end the power interface (8) of fixed bone spicule, and described power interface (8) is positioned at the rear of power interface draw-in groove (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200685117U CN201248761Y (en) | 2008-07-17 | 2008-07-17 | Medical self-drilling self-tapping fixing spicule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200685117U CN201248761Y (en) | 2008-07-17 | 2008-07-17 | Medical self-drilling self-tapping fixing spicule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201248761Y true CN201248761Y (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200685117U Expired - Lifetime CN201248761Y (en) | 2008-07-17 | 2008-07-17 | Medical self-drilling self-tapping fixing spicule |
Country Status (1)
| Country | Link |
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| CN (1) | CN201248761Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114554986A (en) * | 2019-05-05 | 2022-05-27 | D·J·奥尔森 | Surgical tool and method |
-
2008
- 2008-07-17 CN CNU2008200685117U patent/CN201248761Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114554986A (en) * | 2019-05-05 | 2022-05-27 | D·J·奥尔森 | Surgical tool and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090603 Effective date of abandoning: 20080717 |