CN105877828A - Bionic fixing device for treating calcaneal fractures - Google Patents
Bionic fixing device for treating calcaneal fractures Download PDFInfo
- Publication number
- CN105877828A CN105877828A CN201610205232.XA CN201610205232A CN105877828A CN 105877828 A CN105877828 A CN 105877828A CN 201610205232 A CN201610205232 A CN 201610205232A CN 105877828 A CN105877828 A CN 105877828A
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- Prior art keywords
- calcaneus
- intramedullary
- nail
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- hollow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
Abstract
The invention discloses a bionic fixing device for treating calcaneal fractures and belongs to the technical field of medical apparatus and instruments for orthopedics. The bionic fixing device is used for treating the calcaneal fractures. The technical scheme provided by the invention is that two intramedullary nails are embedded into calcaneus and are connected in a cross way for resetting the injured calcaneus; bionic pores are respectively formed in the two intramedullary nails; the directions of the pores are consistent with that of bone trabecula at the pore positions; the pores can guide the bone trabecula to be grown into; the intramedullary nails are made of degradable medical magnesium alloys, do not need to perform secondary surgery to be taken out after being planted, and can be autonomously degraded. The bionic fixing device disclosed by the invention is an initiation in calcaneal surgery of the orthopedics; by adopting a bionic principle, the reconstruction of the bone trabecula is realized and the continuousness of the bone trabecula is restored according to the anatomy and biomechanics characteristics of the bone trabecula as well as the degradability of the intramedullary nails, thereby achieving the aim of effectively restoring local normal structures and mechanical conductivity of bone. The bionic fixing device also has the characteristics of improving a fixing effect, facilitating surgical procedures and the like, and is beneficial for restoration of normal functions of patients; an ideal therapeutic effect is realized.
Description
Technical field
The present invention relates to a kind of fixing device for treating root bone fracture, belong to orthopedic medical device technical field.
Background technology
Calcaneus is the main heavy burden bone of human body, and one piece of spongy bone maximum during calcaneus is also human body shank simultaneously, fracture of calcaneus is modal fracture of tarsus.In the fractures of calcaneus, can not be ignored, reset accurately and the strong fixing patient of being bears a heavy burden as early as possible, the prerequisite of functional rehabilitation.The most either reset, still fix any one link and go wrong, all can cause the generation that fracture of calcaneus posterior joint is scorching, common talalgia occur then, brings unnecessary misery to patient.In fixing be one of the principal mode of calcaneus fractures, the most correct selection inside-fixture, contribute to the early rehabilitation of patient.Owing to the occupation time process of inside-fixture inevitably hinders bone trabecula to rebuild in fracture healing process, can not there be efficient recovery skeleton local normal configuration and mechanotransduction, may result in stress raisers, cause inside-fixture to loosen, exit, the even complication such as fracture.At present, in calcaneus fractures, inside-fixture uses general intramedullary pin, this is just inevitably generated the problems referred to above, it is unfavorable for the post-operative recovery of patient, even causing the adverse consequences being difficult to recover normal function, this situation is the most effectively solved, and becomes the difficult problem affecting calcaneus fractures.In view of this, it is quite necessary to develop the fixing device of a kind of applicable calcaneus fractures, to reach preferable therapeutic effect.
Summary of the invention
The technical problem to be solved is to provide a kind of bionical fixing device treating fracture of calcaneus, this bionical fixing device can realize bone trabecula according to bone trabecular dissection and biomechanics characteristic and rebuild, recover bone trabecular seriality, and then reach have efficient recovery skeleton local normal configuration and mechanotransduction, also there is minimizing operation wound, promote fixed effect, the advantage facilitating operation technique.
The technical scheme solving above-mentioned technical problem is:
nullA kind of bionical fixing device treating fracture of calcaneus，It includes one piece of hollow intramedullary nail、One piece of entity intramedullary pin and 1-4 piece of locking nail，Intramedullary nail holes is had in the middle part of the rivet nut of hollow intramedullary nail，The rivet nut two ends of hollow intramedullary nail and entity intramedullary pin have locking nail respectively，Hollow intramedullary nail and entity intramedullary pin are embedded in calcaneus，Entity intramedullary pin passes intramedullary nail holes and the hollow intramedullary nail interconnection of hollow intramedullary nail，The intersecting plane of hollow intramedullary nail and entity intramedullary pin is paralleled with the sagittal plane of human body，The locking nail of hollow intramedullary nail and entity intramedullary pin is perpendicular with the intersecting plane of hollow intramedullary nail and entity intramedullary pin，1-4 piece of locking nail is each passed through calcaneus from calcaneus side、The locking nail of hollow intramedullary nail and entity intramedullary pin is fixed with calcaneus，The rivet nut of hollow intramedullary nail and entity intramedullary pin has micropore respectively that run through rivet nut，The direction of micropore trend bone trabecular with the calcaneus of micropore position is consistent.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, the intramedullary nail holes inwall of described hollow intramedullary nail has screw thread, entity intramedullary pin to have screw thread to match with the screw thread of intramedullary nail holes with the rivet nut outer wall of the intramedullary nail holes junction of hollow intramedullary nail.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, described locking nail is made up of rivet nut and nut, there is the head of a nail one end of rivet nut, the other end of rivet nut has screw thread, nut matches with rivet nut screw thread, the length of rivet nut is more than the distance between calcaneus both sides, and the head of a nail of locking nail and nut lay respectively at calcaneus both sides and fixed by locking nail.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, one end of described hollow intramedullary nail is positioned at calcaneus back upper place, the other end is positioned at calcaneus front lower place, one end of entity intramedullary pin is positioned at the calcaneus back lower place, the other end is positioned at calcaneus front upper place, and hollow intramedullary nail and the entity intramedullary pin angle in intramedullary nail holes intersection are 60 °.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, micropore and the centrage of the central axis of the length direction of hollow intramedullary nail, the micropore at rivet nut rear portion and the length direction of hollow intramedullary nail that the rivet nut of described hollow intramedullary nail is anterior are 50-60 ° of angle；The anterior micropore of entity intramedullary pin is 20-25 ° of angle with the centrage of the length direction of entity intramedullary pin, and the micropore at rivet nut rear portion is 60-90 ° of angle with the centrage of the length direction of entity intramedullary pin.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, one end of described hollow intramedullary nail is positioned at calcaneus rear, the rivet nut length direction centrage of hollow intramedullary nail is parallel with calcaneus bottom surface, one end of entity intramedullary pin is positioned at the calcaneus back lower place, the other end is positioned at calcaneus front upper place, and hollow intramedullary nail and the entity intramedullary pin angle in intramedullary nail holes intersection are 30 °.
The bionical fixing device of above-mentioned treatment fracture of calcaneus, micropore and the centrage of the length direction of hollow intramedullary nail that the rivet nut of described hollow intramedullary nail is anterior are 25-30 ° of angle, and the micropore at rivet nut rear portion is 60-70 ° of angle with the centrage of the length direction of hollow intramedullary nail；The anterior micropore of entity intramedullary pin becomes 10-20 ° of angle, the micropore at rivet nut rear portion to be 80-90 ° of angle with the centrage of the length direction of entity intramedullary pin with the centrage of the length direction of entity intramedullary pin.
The invention has the beneficial effects as follows:
The present invention is embedded in two intramedullary pins at calcaneus, article two, intramedullary pin interconnection, the calcaneus damaged is resetted, article two, intramedullary pin there is bionic micropore respectively, the direction of micropore is consistent with the bone trabecular trend of micro well locations, and bone trabecula can be guided to grow into, and intramedullary pin uses degradable medical magnesium alloy, need not second operation after implantation be drawn off, can degrade voluntarily.
The present invention is initiating in the operation of orthopaedics calcaneus, use bionic principle, the degradability followed closely according to bone trabecular dissection and biomechanics characteristic and marrow, it is achieved bone trabecula is rebuild, recover bone trabecular seriality, and then reach have efficient recovery skeleton local normal configuration and the purpose of mechanotransduction.The present invention also has minimizing operation wound, promotes fixed effect, facilitates the features such as operation technique, and the beneficially post-operative recovery of patient makes patient bear a heavy burden as early as possible, recovers normal function, to reach preferable therapeutic effect.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the another kind of structural representation of the present invention.
In figure, labelling is as follows: hollow intramedullary nail 1, entity intramedullary pin 2, intramedullary nail holes 3, locking nail 4, locking nail 5, micropore 6, calcaneus 7, bone trabecula 8.
Detailed description of the invention
The present invention includes 1, one piece of entity intramedullary pin 2 of one piece of hollow intramedullary nail and 1-4 piece of locking nail.
Fig. 1,3 displays, have intramedullary nail holes 3 in the middle part of the rivet nut of hollow intramedullary nail 1, the rivet nut two ends of hollow intramedullary nail 1 and entity intramedullary pin 2 have locking nail 4 respectively.Intramedullary nail holes 3 is for by hollow intramedullary nail 1 and entity intramedullary pin 2 interconnection, and locking nail 4 is fixing with calcaneus 7 after locking nail 5 passes hollow intramedullary nail 1 and entity intramedullary pin 2 to be connected.
Fig. 1,3 displays, hollow intramedullary nail 1 and entity intramedullary pin 2 are embedded in calcaneus 6, the intersecting plane of hollow intramedullary nail 1 and entity intramedullary pin 2 is paralleled with the sagittal plane of human body, and the locking nail 4 of hollow intramedullary nail 1 and entity intramedullary pin 2 is perpendicular with the intersecting plane of hollow intramedullary nail 1 and entity intramedullary pin 2.
Fig. 1,3 displays, intramedullary nail holes 3 inwall of hollow intramedullary nail 1 has screw thread, a diameter of 4-8 of screw, the mid portion of the rivet nut of entity intramedullary pin 2 and intramedullary nail holes 3 junction has the screw thread of a length of 12-15, this screw thread matches with the screw thread of intramedullary nail holes 3, entity intramedullary pin 2 hollow intramedullary nail 1 and entity intramedullary pin 2 pass through the threaded of intramedullary nail holes 3, form firm locking relation.
Fig. 1,3 displays, hollow intramedullary nail 1 two ends have locking nail 4 respectively, the most also there is locking nail 4 at the two ends of entity intramedullary pin 2, these locking nail 4 are used for through in fixedly locked nail 5, the diameter of locking nail 4 is 3, and the longitudinal axis of locking nail 4 is all perpendicular with the plane of hollow marrow nail 1 and entity marrow nail 2 formation.
Fig. 2 shows, the locking nail 5 of the present invention is made up of rivet nut and nut, there is the head of a nail one end of rivet nut, the other end of rivet nut has screw thread, nut matches with rivet nut screw thread, the length of rivet nut is more than the distance between calcaneus 7 both sides, and the head of a nail of locking nail 5 and nut lay respectively at calcaneus 7 both sides and fixed by locking nail 5.Locking nail 5 penetrates calcaneus 7 from the side of calcaneus 7, the locking nail 4 in hollow intramedullary nail 1 and entity intramedullary pin 2 rivet nut, and the opposite side at calcaneus 7 passes, fastened by nut, locking nail 5 pressurizes in the both sides of calcaneus 7, thus recovers the width of calcaneus 7, indirectly recovers the height of calcaneus 7.
Fig. 1,3 displays, the rivet nut of hollow intramedullary nail 1 and entity intramedullary pin 2 has micropore 6 respectively that run through rivet nut, the direction of micropore 6 is consistent with the trend of calcaneus 7 bone trabecula 8 of micropore 6 position, micropore 6 can guide bone trabecula 8 to grow into, realize bone trabecula 8 to rebuild, recover the seriality of bone trabecula 8, and then reach have efficient recovery skeleton local normal configuration and the purpose of mechanotransduction.
Fig. 1 shows, a kind of structure of the present invention is, one end of hollow intramedullary nail 1 is positioned at calcaneus 7 back upper place, the other end is positioned at calcaneus 7 front lower place, one end of entity intramedullary pin 2 is positioned at calcaneus 7 back lower place, the other end is positioned at calcaneus 7 front upper place, and hollow intramedullary nail 1 and the entity intramedullary pin 2 angle in intramedullary nail holes 3 intersection are 60 °.
At the rivet nut front portion 1/3rd of the hollow intramedullary nail 1 of this structure, there is the central axis of micropore 6 and the length direction of hollow intramedullary nail 1 on surface, and at rivet nut rear portion 2/3rds, surface has micropore 6 to be 50-60 ° of angle with the centrage of the length direction of hollow intramedullary nail 1.Having micropore 6 at the front portion 1/3rd of entity intramedullary pin 2 is 20-25 ° of angle with the centrage of the length direction of entity intramedullary pin 2, and at rivet nut rear portion 2/3rds, surface has micropore 6 to be 60-90 ° of angle with the centrage of the length direction of entity intramedullary pin 2.A diameter of 0.2-5mm of above-mentioned micropore 6.
Fig. 3 shows, the another kind of structure of the present invention is, one end of hollow intramedullary nail 1 is positioned at calcaneus 7 rear, the rivet nut length direction centrage of hollow intramedullary nail 1 is parallel with calcaneus 7 bottom surface, one end of entity intramedullary pin 2 is positioned at calcaneus 7 back lower place, the other end is positioned at calcaneus 7 front upper place, and hollow intramedullary nail 1 and the entity intramedullary pin 2 angle in intramedullary nail holes 3 intersection are 30 °.
Having micropore 6 at the rivet nut front portion 1/2nd of the hollow intramedullary nail 1 of this structure is 25-30 ° of angle with the centrage of the length direction of hollow intramedullary nail 1, and having micropore 6 at rivet nut rear portion 1/2nd is 60-70 ° of angle with the centrage of the length direction of hollow intramedullary nail 1.Having micropore 6 to become 10-20 ° of angle with the centrage of the length direction of entity intramedullary pin 2 at the front portion 1/2nd of entity intramedullary pin 2, having micropore 6 at rivet nut rear portion 1/2nd is 80-90 ° of angle with the centrage of the length direction of entity intramedullary pin 2.
The hollow intramedullary nail 1 of the present invention and the material of entity intramedullary pin 2 are medical magnesium alloy, and medical magnesium alloy is a kind of degradable embedded material.Compared with traditional embedded material, medical magnesium alloy has the advantage that (1) has degradability, magnesium alloy has relatively low corrosion potential, corrosion degradation easily occurs under the internal milieu containing chloride ion, thus need not second operation after implanting human body and be drawn off；(2) safety is high, mainly excretes through urinary system, for human body without obvious toxic and side effects；(3) good mechanical compatibility, the elastic modelling quantity of magnesium alloy can with skeleton closest to, avoiding problems the problem that some conventional implant materials bring, such as stress capture-effect.
The locking nail 5 of the present invention uses the nondegradable material of titanium matter.The head of a nail is hexagon, and the length of side is 10-20, and thickness is 3-5, nail rod a diameter of 3, a length of 22-40, and locking nail 5 fore-end has screw thread, screw thread and nut, remainder smooth surface.Nut is hexagon, and thickness is 3-5, and its length of side is 10-20.
One embodiment of the present of invention is as follows:
The a length of 50-100mm of hollow marrow nail 1, outer diameter is 6-12, and diameter of bore is 2-6.
The a length of 50-100mm of entity intramedullary pin 2, a diameter of 4-8.
Claims (7)
- null1. the bionical fixing device treating fracture of calcaneus，It is characterized in that: it includes one piece of hollow intramedullary nail (1)、One piece of entity intramedullary pin (2) and 1-4 piece of locking nail (5)，Intramedullary nail holes (3) is had in the middle part of the rivet nut of hollow intramedullary nail (1)，The rivet nut two ends of hollow intramedullary nail (1) and entity intramedullary pin (2) have locking nail (4) respectively，Hollow intramedullary nail (1) and entity intramedullary pin (2) are embedded in calcaneus (7)，Entity intramedullary pin (2) passes intramedullary nail holes (3) and hollow intramedullary nail (1) interconnection of hollow intramedullary nail (1)，The intersecting plane of hollow intramedullary nail (1) and entity intramedullary pin (2) is paralleled with the sagittal plane of human body，The locking nail (4) of hollow intramedullary nail (1) and entity intramedullary pin (2) is perpendicular with the intersecting plane of hollow intramedullary nail (1) and entity intramedullary pin (2)，1-4 piece of locking nail (5) is each passed through calcaneus (7) from calcaneus (7) side、The locking nail (4) of hollow intramedullary nail (1) and entity intramedullary pin (2) is fixing with calcaneus (7) to be connected，The rivet nut of hollow intramedullary nail (1) and entity intramedullary pin (2) has micropore (6) respectively that run through rivet nut，The direction of micropore (6) is consistent with the trend of calcaneus (7) bone trabecula (8) of micropore (6) position.
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 1, it is characterized in that: intramedullary nail holes (3) inwall of described hollow intramedullary nail (1) has screw thread, entity intramedullary pin (2) to have screw thread to match with the screw thread of intramedullary nail holes (3) with the rivet nut outer wall of intramedullary nail holes (3) junction of hollow intramedullary nail (1).
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 1 and 2, it is characterized in that: described locking nail (5) is made up of rivet nut and nut, there is the head of a nail one end of rivet nut, the other end of rivet nut has screw thread, nut matches with rivet nut screw thread, the length of rivet nut is more than the distance between calcaneus (7) both sides, and the head of a nail of locking nail (5) and nut lay respectively at calcaneus (7) both sides and fixed by locking nail (5).
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 3, it is characterized in that: one end of described hollow intramedullary nail (1) is positioned at calcaneus (7) back upper place, the other end is positioned at calcaneus (7) front lower place, one end of entity intramedullary pin (2) is positioned at calcaneus (7) back lower place, the other end is positioned at calcaneus (7) front upper place, and hollow intramedullary nail (1) and the entity intramedullary pin (2) angle in intramedullary nail holes (3) intersection are 60 °.
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 4, it is characterized in that: micropore (6) and the centrage of the central axis of the length direction of hollow intramedullary nail (2), the micropore (6) at rivet nut rear portion and the length direction of hollow intramedullary nail (2) that the rivet nut of described hollow intramedullary nail (1) is anterior are 50-60 ° of angle；The anterior micropore (6) of entity intramedullary pin (2) is 20-25 ° of angle with the centrage of the length direction of entity intramedullary pin (2), and the micropore (6) at rivet nut rear portion is 60-90 ° of angle with the centrage of the length direction of entity intramedullary pin (2).
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 3, it is characterized in that: one end of described hollow intramedullary nail (1) is positioned at calcaneus (7) rear, the rivet nut length direction centrage of hollow intramedullary nail (1) is parallel with calcaneus (7) bottom surface, one end of entity intramedullary pin (2) is positioned at calcaneus (7) back lower place, the other end is positioned at calcaneus (7) front upper place, and hollow intramedullary nail (1) and the entity intramedullary pin (2) angle in intramedullary nail holes (3) intersection are 30 °.
- The bionical fixing device for the treatment of fracture of calcaneus the most according to claim 6, it is characterized in that: micropore (6) and the centrage of the length direction of hollow intramedullary nail (1) that the rivet nut of described hollow intramedullary nail (1) is anterior are 25-30 ° of angle, and the micropore (6) at rivet nut rear portion is 60-70 ° of angle with the centrage of the length direction of hollow intramedullary nail (1)；The anterior micropore (6) of entity intramedullary pin (2) becomes 10-20 ° of angle with the centrage of the length direction of entity intramedullary pin (2), and the micropore (6) at rivet nut rear portion is 80-90 ° of angle with the centrage of the length direction of entity intramedullary pin (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205232.XA CN105877828A (en) | 2016-04-05 | 2016-04-05 | Bionic fixing device for treating calcaneal fractures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610205232.XA CN105877828A (en) | 2016-04-05 | 2016-04-05 | Bionic fixing device for treating calcaneal fractures |
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| Publication Number | Publication Date |
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| CN105877828A true CN105877828A (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610205232.XA Pending CN105877828A (en) | 2016-04-05 | 2016-04-05 | Bionic fixing device for treating calcaneal fractures |
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| CN (1) | CN105877828A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108143477A (en) * | 2017-12-18 | 2018-06-12 | 武汉大学 | Using the intramedullary bone lengthening device of memory alloy spring electromagnetic heating |
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| US6579293B1 (en) * | 2000-08-02 | 2003-06-17 | Rama E. Chandran | Intramedullary rod with interlocking oblique screw for tibio-calcaneal arthrodesis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20160824 |