CN208573815U - It is a kind of can precise positioning and be used for cortex bone channel bone cement screw - Google Patents

Abstract

The utility model, which discloses, a kind of precise positioning and can be used for the bone cement screw in cortex bone channel, including hollow screw ontology and the U-shaped screw cap for being fixed on hollow screw body end, wherein, at least more than one the bone cement overfolw hole communicated with bone cement chamber is equipped with along central axial direction on the lower end outside wall of hollow screw ontology, it is equipped with bone cement injection hole along central axial direction in the upper center of hollow screw ontology, at least one the first reference lines are additionally provided on the lateral wall of hollow screw ontology；At least one the second reference lines are additionally provided on U-shaped screw cap at least side lateral wall.The application on the basis of the screw of cortex channel will the improvement residing in hollow designs, in conjunction with the reference line on screw body and U-shaped screw cap.The position that can accurately determine bone cement overfolw hole after Safe screw is placed in can further enhance the stability that bone cement and screw, bone trabecula are fixed according to this region of anatomical research there are bone trabecula after bone cement is perfused.

Description

It is a kind of can precise positioning and be used for cortex bone channel bone cement screw

Technical field

The utility model relates to a kind of screws, and relating particularly to one kind can precise positioning and the bone for cortex bone channel Cement screw belongs to the field of medical instrument technology.

Background technique

With increasingly sharpening for China human mortality aging, more and more sufferers of osteoporosis face need to carry out because of spinal disease Fixed operation.However osteoporosis will will affect the holding power of screw and bone interface, so as to cause the generation of Unstable internal fixation Rate increases.The expenditure of medical expense is increased while bringing additional pain to patient.

For the holding power for increasing internal fixation of spine, its stability is improved, cortex bone channel screw and bone water has occurred Mud strengthening screw technology.The former bone amount fall based on cortex bone in osteoporosis model far below cancellous bone bone amount this One discovery.It improves and sets nail channel, enter screw through centrum isthmus, contact 4 layers of cortex bone, improve the stability of its fixation. There is researches show that its resisting pull out forces to improve 30% compared to conventional pedicle screws.The latter is injected by hollow bone cement screw Bone cement fixes bone cement with screw and bone trabecula interface, although being remarkably improved the pullout of strength of screw, one Denier screw is accidentally set or bone cement injection excessively causes to leak, and the high fever that bone cement polymerization generates can damage surrounding spinal cord or mind Through root.The damage for being difficult to retrieve is caused to patient.

Therefore, how to significantly improve the stability of sufferers of osteoporosis face screw under the premise of accurate, safety is current ridge Column surgery urgent problem to be solved.In this context, we, which have developed, a kind of precise positioning and can be used for the bone in cortex bone channel Cement screw.

Summary of the invention

For many shortcomings and deficiencies present in above-mentioned background technique, the utility model is improved and has been created to this Newly, bone cement will can be perfused in screw distal openings the improvement residing in hollow design on the basis of the screw of cortex channel, while Raised graticule is set on screw and U-shaped screw cap, be placed in operative doctor can accurately by distal screw tapping in art Cancellous bone region, it is ensured that the bone cement of perfusion can be fixed with screw, bone trabecula interface.To significantly improve its stability.

In order to solve the above problem and reach above-mentioned goal of the invention, the utility model one kind precise positioning and can be used for cortex The bone cement screw in bone channel is realized by using following design structure and using following technical solution:

As the utility model one kind can precise positioning and for cortex bone channel bone cement screw improvement, the screw The hollow screw ontology (1) of marrow mud can be perfused and be fixed on the U-shaped spiral shell of hollow screw ontology (1) end by being equipped with including inside The head of a nail (2), the threaded one end of U-shaped screw cap (2) connect the matched connecting rod (3) used, and the other end connects hollow screw Ontology (1), the upper end lateral wall of hollow screw ontology (1) and the inner sidewall universal rotational of U-shaped screw cap (2), in hollow screw It overflows on the lower end outside wall of ontology (1) along the bone cement communicated with bone cement chamber that central axial direction is equipped at least more than one Portal (11), bone cement injection hole (12) is equipped with along central axial direction in the upper center of hollow screw ontology (1), hollow At least one the first reference lines (13) are additionally provided on the lateral wall of screw body (1)；Outside at least side of U-shaped screw cap (2) At least one the second reference lines (21) are additionally provided on side wall.

The improvement above-mentioned as the utility model, the hollow screw ontology (1) include conical construction section (14) and with The thread segment (15) that conical construction section (14) is made into integration, thread segment (15) are full thread or half-thread；Thread segment (15) is stretched U-shaped screw cap (2) is outside out.

The further improvement above-mentioned as the utility model, the thread segment (15) include upper section screw thread (151) and lower section Screw thread (152), the screw pitch of lower section screw thread (152) are equal to or more than the screw pitch of upper section screw thread (151)；Upper section screw thread (151) and under Section screw thread (152) is deep thread or shallow thread, and upper section screw thread (151) is identical as the screw thread of lower section screw thread (152) or not Together.

The further improvement above-mentioned as the utility model, in hollow screw ontology (1), upper center is provided with taper Or cylindrical mounting hole, the head end kissing on the mounting hole top and connecting rod (3) of cylindricality or taper are matched.

The further improvement above-mentioned as the utility model is symmetrically arranged with threaded in the two sides of U-shaped screw cap (2) Arc connector (22) is symmetrically arranged with U-shaped mounting groove (23) between two connectors (22), the position of two U-shaped mounting grooves (23) It sets and is adapted with the position of connecting rod (3).

The further improvement above-mentioned as the utility model is also symmetrically arranged at least one in the two sides of U-shaped screw cap (2) A circular connection card hole (24), connection card hole (24) are matched with the connector kissing on connecting rod (3) respectively；The hollow screw The head of ontology (1) is conical nose or spherical head；There are two the bone cement overfolw hole (11) sets, two bone cements overflow The diameter in hole (11) increases from top to bottom.

The again further improvement above-mentioned as the utility model, first reference line (13) are provided with one, one First reference line (13) is set on the side lateral wall of hollow screw ontology (1)；Second reference line (21) is set to U-shaped The second reference line (21) design structure of the two sides of screw cap (2), two sides is identical or different.

The again again further improvement above-mentioned as the utility model, first reference line (13) and second benchmark Line (21) is upward convex bump either to recessed recessed groove, and in the first reference line (13) and second benchmark It is additionally provided on line (21) with color or with the decorative pattern of font pattern.

As the utility model it is above-mentioned again be more further improved again, first reference line (13) is along hollow screw sheet The length direction of body (1) is opened up along extension to the bottom sides of hollow screw ontology (1) from the top sides of hollow screw ontology (1) Edge；Second reference line (21) opens up from the top sides of U-shaped screw cap (2) along extension along the length direction of U-shaped screw cap (2) The extremely bottom edge of U-shaped screw cap (2), and the design structure of the second reference line (21) of two sides is different, wherein side is set as Solid line, the other side are set as dotted line either side and are set as upward convex bump, and the other side is set as to recessed recess Slot.

It is also more further improved as the utility model is above-mentioned, the hollow screw ontology (1) and the U-shaped spiral shell The direction of rotation of the head of a nail (2) is consistent, is provided with U-shaped interstage sleeve (4) in U-shaped screw cap (2), and the screw thread of the thread segment (15) is double The combination of line screw thread, single thread or double thread and single thread.

Utility model has the following beneficial effects compared with the prior art: the application combines existing cortex bone channel The fixed characteristic of screw and bone cement screw, in cortex channel on the basis of screw will the improvement residing in hollow designs, in conjunction with screw Reference line on ontology and U-shaped screw cap.The position that can accurately determine bone cement overfolw hole after Safe screw is placed in, according to dissection Learn and study this region there are bone trabecula, can be further enhanced after bone cement be perfused bone cement and screw, bone trabecula fixation it is steady It is qualitative；Simultaneously as diameter gradually increases the screw lower end bone cement overfolw hole of the utility model from top to bottom, meet fluid force Gate principle is learned, enables bone cement even into centrum, increases the stability of anchoring.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:

Fig. 1 is one of entirety perspective view of the utility model；

Fig. 2 is the two of the entirety perspective view of the utility model；

Fig. 3 is the main view of the utility model；

Fig. 4 is the right view of the utility model；

Fig. 5 is the left view of the utility model；

Fig. 6 is the top view of utility model；

Fig. 7 is second of design structure of utility model；

Fig. 8 is the overall structure diagram of U-shaped interstage sleeve (4) component of the utility model；

Fig. 9 is one of usage state diagram of the utility model

Figure 10 is the two of the usage state diagram of the utility model；

Figure 11 is the three of the usage state diagram of the utility model；

Figure 12 is the four of the usage state diagram of the utility model；

Figure 13 is the five of the usage state diagram of the utility model；

Wherein, figure label: 1-hollow screw ontology, 11-bone cement overfolw holes, 12-bone cement injection holes, 13- First reference line, 14-conical construction sections, 15-thread segments, 151-upper section screw threads, 152-lower section screw threads；

2-U-shaped screw caps, the 21-the second reference line, 22-connectors, 23-U-shaped mounting grooves, 24-connection card holes；

3-connecting rods；

4-U-shaped interstage sleeves；

5-marrow mud.

Specific embodiment

In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under Further detailed description is made to the technical solution of the utility model in conjunction with attached drawing and specific embodiment in face.

One kind as shown in Figure of description 1 to Figure of description 13 can precise positioning and the bone water for cortex bone channel Mud snail nail, the fixing screws include that inside is equipped with the hollow screw ontology 1 that marrow mud can be perfused and is fixed on hollow screw ontology 1 The U-shaped screw cap 2 of end, the threaded one end of U-shaped screw cap 2 connect the matched connecting rod 3 used, and other end connection is hollow Screw body 1, the inner sidewall universal rotational of the upper end lateral wall of hollow screw ontology 1 and U-shaped screw cap 2, wherein in hollow spiral shell It follows closely and overflows on the lower end outside wall of ontology 1 along the bone cement communicated with bone cement chamber that central axial direction is equipped at least more than one Portal 11, bone cement injection hole 12 is equipped with along central axial direction in the upper center of hollow screw ontology 1, in hollow screw sheet At least one the first reference lines 13 are additionally provided on the lateral wall of body 1；It is additionally provided on at least side lateral wall of U-shaped screw cap 2 At least one the second reference lines 21.

Further, hollow screw ontology 1 includes conical construction section 14 and is made into integration with conical construction section 14 Thread segment 15, thread segment 15 are full thread or half-thread；Thread segment 15 stretches out outside U-shaped screw cap 2.

Specifically, thread segment 15 includes upper section screw thread 151 and lower section screw thread 152, the screw pitch of lower section screw thread 152 is equal to or greatly In the screw pitch of upper section screw thread 151；Upper section screw thread 151 and lower section screw thread 152 are deep thread or shallow thread, and upper section screw thread 151 with The screw thread of lower section screw thread 152 is identical or different.

Specifically, being provided with taper or cylindrical mounting hole, the peace of cylindricality or taper in 1 upper center of hollow screw ontology Dress hole top and the head end kissing of connecting rod 3 are matched.

More specifically, threaded arc connector 22, two connectors 22 are symmetrically arranged in the two sides of U-shaped screw cap 2 Between be symmetrically arranged with U-shaped mounting groove 23, the position of two U-shaped mounting grooves 23 is adapted with the position of connecting rod 3.

Further, at least one circular connection card hole 24, connection card are also symmetrically arranged in the two sides of U-shaped screw cap 2 Match respectively with the connector kissing in connecting rod 3 in hole 24；The head of the hollow screw ontology 1 is conical nose or ballhead Portion；There are two the bone cement overfolw hole 11 is set, the diameter of two bone cement overfolw holes 11 increases from top to bottom.

Further, the first reference line 13 is provided with one, and first reference line 13 is set to hollow screw ontology 1 On the lateral wall of side；Second reference line 21 is set to the two sides of U-shaped screw cap 2, and the second reference line 21 of two sides designs knot Structure is identical or different.

Specifically, the first reference line 13 and second reference line 21 are upward convex bump either to recessed recessed Slot is fallen into, and is additionally provided on the first reference line 13 and second reference line 21 with color or with the decorative pattern of font pattern.

More specifically, the first reference line 13 is along the length direction of hollow screw ontology 1 from the top of hollow screw ontology 1 Edge extension is opened up to the bottom edge of hollow screw ontology 1；Length direction of second reference line 21 along U-shaped screw cap 2 It opens up to the bottom edge of U-shaped screw cap 2 along extending from the top sides of U-shaped screw cap 2, and the second reference line 21 of two sides is set It is different to count structure, wherein side is set as solid line, and the other side is set as dotted line either side and is set as upward convex bump, The other side is set as to recessed recessed groove.

Specifically, hollow screw ontology 1 is consistent with the direction of rotation of U-shaped screw cap 2, it is provided in U-shaped screw cap 2 U-shaped Interstage sleeve 4, the screw thread of thread segment 15 are the combination of double thread, single thread or double thread and single thread.

In conclusion more specifically embodiment is the utility model:

Step 1: in operation, cutting skin, sufficiently remove machine by vertebra, after exposing vertebral plate anatomical structure, determines that cortex bone is logical The entry point of road screw, entry point on the right side of in the of 5 points or on the left of in the of 7 points, are set and receive 10 degree in staple rail mark, tail inclines below the pedicle isthmus It 25 ° to 30 °, is placed in along pedicle of vertebral arch bottom margin.Screw way is directed toward on the right side of 12~01 o'clock direction or 11~12 o'clock direction left side；

Step 2: screw way is prepared using special equipment；

Step 3: by any the of any first reference line 13 of 1 lateral wall of screw body and U-shaped 2 lateral wall of screw cap The alignment of two reference lines 21, makes convex portion at two coincide and draw a straight line.Then will set connecting rod 3 and U-shaped nut 2, Screw body 1 connects；

Step 4: side protrusion is aligned below pedicle isthmus at 7 points if the os integumentale screw of merging left side, if merging Right side os integumentale screw then will be at 5 points below side protrusion alignment pedicle isthmus.After the completion of screw merging, U is followed closely outside the head of a nail 2 Second reference line 21 of side wall may continue as determine 1 the first reference line of lateral wall 13 of screw body reference, still need in alignment with Below pedicle isthmus on the right side of in the of 5 points or at 7 points of left sides；

Step 5: on this basis, bone cement can be perfused by the bone cement overfolw hole 11 of hollow screw ontology 1.

In screw provided in this embodiment, hollow screw ontology 1 and U-shaped screw cap 2 are all made of titanium alloy and are made.It can also adopt Hollow screw ontology 1 and U-shaped screw cap 2 is made with other materials, as long as being able to satisfy human body needs, the utility model does not do this Limitation.

The utility model can be perfused the screw body of bone cement and be designed base on screw and U-shaped nut using hollow design Directrix realizes the accurate efficient perfusion of bone cement in operation as reference, can reduce the dosage of bone cement, reduces bone cement and seeps The generation of leakage.The stability of screw can also be enhanced simultaneously.

Above to one kind provided by the utility model can precise positioning and for cortex bone channel bone cement screw into It has gone and has been discussed in detail, while also the principles of the present invention have been described herein, the explanation of the above working principle is It is used to help understand the core concept of the utility model.It should be pointed out that for those skilled in the art, Under the premise of not departing from the utility model principle, the utility model can also be made improvements and modifications, these improvement and modification It also falls into the protection scope of the utility model claims.

Claims (10)

1. one kind precise positioning and can be used for the bone cement screw in cortex bone channel, which includes that marrow can be perfused in internal be equipped with The hollow screw ontology (1) of mud and the U-shaped screw cap (2) for being fixed on hollow screw ontology (1) end, the one of U-shaped screw cap (2) End is threadedly coupled the matched connecting rod (3) used, and the other end connects hollow screw ontology (1), hollow screw ontology (1) The inner sidewall universal rotational of upper end lateral wall and U-shaped screw cap (2), it is characterised in that: outside the lower end of hollow screw ontology (1) It is equipped at least more than one the bone cement overfolw hole (11) communicated with bone cement chamber along central axial direction on side wall, hollow The upper center of screw body (1) is equipped with bone cement injection hole (12) along central axial direction, in the outer of hollow screw ontology (1) At least one the first reference lines (13) are additionally provided on side wall；It is additionally provided at least on at least side lateral wall of U-shaped screw cap (2) One the second reference line (21).

2. one kind according to claim 1 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: the hollow screw ontology (1) includes the screw thread that cone construction section (14) and is made into integration with conical construction section (14) Section (15), thread segment (15) are full thread or half-thread；Thread segment (15) stretches out U-shaped screw cap (2) outside.

3. one kind according to claim 2 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists It include upper section screw thread (151) and lower section screw thread (152) in: the thread segment (15), the screw pitch of lower section screw thread (152) is equal to or greatly Screw pitch in upper section screw thread (151)；Upper section screw thread (151) and lower section screw thread (152) are deep thread or shallow thread, and upper section screw thread (151) identical or different as the screw thread of lower section screw thread (152).

4. one kind according to claim 2 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: hollow screw ontology (1) upper center is provided with taper or cylindrical mounting hole, the mounting hole top of cylindricality or taper with The head end kissing of connecting rod (3) is matched.

5. one kind according to claim 4 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: it is symmetrically arranged with threaded arc connector (22) in the two sides of U-shaped screw cap (2), it is symmetrical between two connectors (22) Equipped with U-shaped mounting groove (23), the position of two U-shaped mounting grooves (23) is adapted with the position of connecting rod (3).

6. one kind according to claim 1 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: it is also symmetrically arranged at least one circular connection card hole (24) in the two sides of U-shaped screw cap (2), connection card hole (24) is respectively Match with the connector kissing on connecting rod (3)；The head of the hollow screw ontology (1) is conical nose or spherical head；Institute It states there are two bone cement overfolw hole (11) sets, the diameter of two bone cement overfolw holes (11) increases from top to bottom.

7. one kind according to claim 1 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: first reference line (13) is provided with one, and first reference line (13) is set to the side of hollow screw ontology (1) On lateral wall；Second reference line (21) is set to the two sides of U-shaped screw cap (2), the second reference line (21) design of two sides Structure is identical or different.

8. one kind according to claim 7 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: first reference line (13) and second reference line (21) be upward convex bump either to recessed recess Slot, and be additionally provided on the first reference line (13) and second reference line (21) with color or with the decorative pattern of font pattern.

9. one kind according to claim 7 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: first reference line (13) is prolonged along the length direction of hollow screw ontology (1) from the top sides edge of hollow screw ontology (1) Stretch out the bottom edge set to hollow screw ontology (1)；Length direction of second reference line (21) along U-shaped screw cap (2) It is opened up from the top sides of U-shaped screw cap (2) along extension to the bottom edge of U-shaped screw cap (2), and the second reference line of two sides (21) design structure is different, and wherein side is set as solid line, and the other side is set as dotted line either side and is set as upward convex Bump, the other side is set as to recessed recessed groove.

10. one kind according to claim 2 precise positioning and can be used for the bone cement screw in cortex bone channel, feature exists In: the hollow screw ontology (1) is consistent with the direction of rotation of the U-shaped screw cap (2), is provided with U in U-shaped screw cap (2) Type interstage sleeve (4), the screw thread of the thread segment (15) are the combination of double thread, single thread or double thread and single thread.