CN101912299B - Integrated intramedullary nail system for treating proximal femoral fracture - Google Patents
Integrated intramedullary nail system for treating proximal femoral fracture Download PDFInfo
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- CN101912299B CN101912299B CN2010102715208A CN201010271520A CN101912299B CN 101912299 B CN101912299 B CN 101912299B CN 2010102715208 A CN2010102715208 A CN 2010102715208A CN 201010271520 A CN201010271520 A CN 201010271520A CN 101912299 B CN101912299 B CN 101912299B
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Abstract
The invention discloses an integrated intramedullary nail system for treating proximal femoral fracture. The system comprises a main nail (1), an integrated head screw (2), a first supporting screw (3), a second supporting screw (4) and a slip sheet (5), wherein the main nail (1) is made of titanium and consists of a proximal part (11), a transition part (12) and a distal part (13). The novel integrated intramedullary nail system can effectively prevent rotation displacement at the post-operation fracture alignment part and collapse at the fracture end so as to reduce the possibility of related post-operation complications.
Description
Technical field
The present invention relates to bone surgery and use equipment, particularly the marrow internal fixation equipment of intertrochanteric fracture of the femur is specially a kind of integrated intramedullary nail system in the treatment fractured near end of thighbone.
Background technology
Along with the aged tendency of population process, the sickness rate of intertrochanteric fracture of the femur increases day by day.The marrow internal fixation is used more and more widely in the treatment of intertrochanteric fracture of the femur because of its biomechanical advantage.Yet intramedullary pin related complications such as the rotation of femur head and neck, a screw cutting, neck of femur cripetura, femur head and neck turn in subsiding, fracture of shaft of femur are also following.Through the development of several generations marrow internal fixation device, thereby make it to adapt and significantly reduced the incidence rate of fracture of shaft of femur with the femur normal physiological bending through changing main nail valgus angle.Yet; Bear a heavy burden after the early stage intramedullary pin fixation and cause the fracture site institute of subsiding to cause that the generation of turning over even cutting in neck of femur cripetura, the head and neck and the rotation of femur head and neck etc. are still puzzlement orthopedist's a difficult problem, also become the problem greatly that hinders the application of intramedullary pin technology in intertrochanteric fracture of the femur.Chinese patent CN200320107607.7 has announced the compound interlocking intramedullary nail of a kind of self-locking, and the introducing through neck of femur self-locking nail core prevents to rotate displacement after the fracture butt joint.Among another patent CN200510106968.3, people such as the strange background of cloth dimension of L human relations Austria prevent the rotation of femur head and neck through two screws that converges mutually.Though the design of above-mentioned patent can prevent the rotation of postoperative generation femur head and neck to a certain extent, the fracture site that takes place for the postoperative related complication that subsides does not have obvious benifit.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing relevant intramedullary pin head screw designs, adopt and integrate a screw, thus reduce postoperative bear a heavy burden cause fracture site subside cause and turn in neck of femur cripetura, the head and neck even the generation of related complication such as cutting.
The invention provides a kind of integrated intramedullary nail system that is used to treat fractured near end of thighbone, comprise main nail, integrate a screw, first supporting screw, second supporting screw and slide plate; Main nail is by the titanium manufacturing, and it comprises proximal part, transition portion and three parts of distal portions, and the axis of proximal part becomes angle α with the axis of distal portions be 175-176 °, and transition portion carries out nature and is connected transition between the two; Be respectively arranged with three ducts on the proximal part, be followed successively by first duct, second duct, the 3rd duct of oblique setting from top to bottom with the substantially parallel setting in first duct; First duct comprises and is used to hold the rectangle head screw duct of rectangle head screw and the lag screw duct that is used to hold lag screw; Second duct is positioned at the below in first duct and is close to first duct and is provided with, and the diameter in second duct is little near the part of lateral wall near the part of medial wall, and second duct has female thread in the part near the medial wall; Angle β between the axis in first duct and second duct and the axis of proximal part is 120 °; The 3rd duct is used to hold second supporting screw, and the axis in the 3rd duct is vertical basically with the axis of proximal part; Proximal part near having slideway on the inner wall section; Slideway is "
" shape; Also be; Slideway is narrower near the part of near-end medial wall; And near the part broad of proximal part core, the slideway bottom is lower than the 3rd duct, and the upper end arrives the bottom in first duct; Slide plate comprises superposed slip ring and the rectangular sheet that is positioned at the bottom, slip ring hollow, and the size of its hollow space is basic identical with first duct with shape, and the rectangular sheet width of bottom is less than the partial width of slideway near the near-end medial wall; Slide plate is processed by having flexible steel disc.
The thickness of slide plate is about 0.5mm, and the length of bottom rectangle sheet and width are respectively 18mm and are 8mm.
The shape of cross section of proximal part is rounded square basically; The cross section of distal portions is circular.
Integrate a screw and comprise rectangle head screw, lag screw and tail medicated cap.
Rectangle head screw section is roughly the rectangular configuration of long 10mm, wide 3mm, and its abdominal part center has embeded slot, and this embeded slot can form perfect cooperation with the trapezoidal slide bar of falling of lag screw back.
The afterbody of rectangle head screw and lag screw has external screw thread; The section of lag screw is the sub-circular structure of 240 ° of diameter 12mm, radian.
Use novel integrated intramedullary nail system according to the invention can prevent effectively that postoperative fracture para-position place rotation displacement and fracture end from subsiding, thereby reduce the possibility that the postoperative related complication takes place.
Description of drawings
Fig. 1 is applied to the sketch map of fractured near end of thighbone for integrated intramedullary nail of the present invention;
Fig. 2 is for being main nail front view;
Fig. 3 is main nail side view;
Fig. 4 is for following closely the proximal part cross-sectional view along A-A to the master who is done among Fig. 3;
Fig. 5 is for integrating a screw cross section enlarged diagram;
Fig. 6 is for integrating a screw tail medicated cap sketch map;
Fig. 7 is the slide plate enlarged diagram for Fig. 6.
The specific embodiment
In order more at large to understand technical scheme of the present invention, will combine accompanying drawing that the present invention is made concrete elaboration below.
Fig. 1,2 shows the integrated intramedullary nail system that is used to treat fractured near end of thighbone of the present invention, and this system comprises main nail 1, integrate a screw 2, first supporting screw 3, second supporting screw 4 and slide plate 5.Master's nail 1 is preferably by the titanium manufacturing; It comprises proximal part 11, transition portion 12 and 13 3 parts of distal portions; Proximal part 11 is suitable for inserting near end of thighbone and femoral shaft respectively with distal portions 13; And in order to adapt to the femur anatomical shape, the axis of proximal part 11 becomes angle α to be about 175-176 ° with the axis of distal portions 13, and transition portion 12 carries out nature and is connected transition between the two.
Like Fig. 2, shown in 3, be respectively arranged with three ducts on the proximal part 11, be followed successively by from top to bottom oblique setting first duct, with second duct 113, the 3rd duct 115 of the substantially parallel setting in first duct.A screw 2 is integrated by being used to hold in first duct, its shape with work good after the profile of an integration screw be complementary, and it comprises the rectangle head screw duct 111 and the lag screw duct 112 that is used to hold lag screw 22 that is used to hold rectangle head screw 21.Second duct 113 is positioned at the below in first duct and is close to first duct and is provided with; And the diameter in second duct 113 is little near the part (right side among Fig. 2) of lateral wall near the part (left side among Fig. 2) of medial wall; Second duct 113 has female thread in the part near the medial wall, so that the screw-in of first supporting screw 3.Angle β between the axis in first duct and second duct and the axis of proximal part is about 120 °, and this angle is slightly less than collodiaphyseal angle, so that integrate the stress that a screw 2 dorsal parts can bear bigger vertical direction conduction under the heavy burden situation.The axis that the 3rd duct 115 is used to hold second supporting screw, 4, the three ducts is vertical basically with the axis of proximal part 11, helps 4 pairs of slide plates 5 of second supporting screw like this and stops supporting.
Shown in Fig. 2-4, proximal part 11 near having slideway 114 on the inner wall section, the end portion (as shown in Figure 2) in the just recessed proximal part 11 of slideway 114.When slide plate 5 was installed, slideway 114 was used to make slide plate 5 to slide within it, and after being in place, slide plate 5 is contained in the slideway 114.As shown in Figure 4; Fig. 4 among Fig. 3 along A-A to the cross-sectional view of being done; Be inverse-T-shaped at Fig. 4 middle slideway 114; Slideway should be
shape in fact; Also promptly, slideway 114 is narrower near the part of near-end medial wall, and near the part broad of proximal part 11 cores.Slideway 114 bottoms are lower than the 3rd duct 115, and the upper end arrives the bottom in first duct.As shown in Figure 4, the shape of cross section of proximal part 11 is rounded square basically.The cross section of distal portions 13 is circular.
Like Fig. 5,6, integrate a screw 2 and comprise rectangle head screw 21, lag screw 22 and tail medicated cap 23.Rectangle head screw 21 sections are roughly the rectangular configuration of long 10mm, wide 3mm, and its abdominal part center has embeded slot, and this embeded slot can form perfect cooperation with the trapezoidal slide bar 221 of falling of lag screw 22 backs.The afterbody of rectangle head screw 21 and lag screw 22 has external screw thread; After rectangle head screw 21 and lag screw 22 are worked good; Can tail medicated cap 23 be tightened on the said external screw thread; Thereby form a complete integration screw 2, and prevent between rectangle head screw 21 and the lag screw 22 to produce along the relative motion of falling on the trapezoidal embeded slot direction; Tail medicated cap 23 can also produce impedance with main nail lateral wall, prevents to integrate a screw 2 and wears out femoral head and pass to pelvic cavity.The front portion of said lag screw 22 also is provided with external screw thread, is used for lag screw is screwed in lag screw duct 112.The section of lag screw 22 is diameter 12mm, 240 ° of sub-circular structures of radian.The dorsal part of rectangle head screw 21 adopts planar design, has increased bone and the contact area of integrating a screw on the vertical direction, embeded slot with fall the cooperating of trapezoidal slide bar, prevented with the relative rotation between lag screw 22 and the rectangle head screw 21.
First supporting screw 3 and second supporting screw 4 are supporting screw of the prior art, and the two screws in the adjustable length in second duct 113 and the 3rd duct 115, can obtain best inboard supporting according to the fracture concrete condition.
Like Fig. 7; Slide plate 5 comprises superposed slip ring 51 and the rectangular sheet 52 that is positioned at the bottom; Slip ring 51 hollows; The size of its hollow space and shape are basic identical with first duct, and rectangular sheet 52 width of bottom are less than the partial width of slideway 114 near the near-end medial wall, thereby slide plate 5 is enclosed in the slideway 114.Slide plate 5 is processed by having flexible steel disc, and its thickness is about 0.5mm, and the length of bottom rectangle sheet and width are respectively 18mm and are 8mm.Receive when slide plate 5 under the situation of extruding force of first supporting screw 3, because slide plate has pliability, it can slide along integrating a screw.
During operation, before squeezing into main nail 1, need earlier slide plate 5 to be placed in the slideway 114.Slide plate 5 bottoms (far-end) along slideway 114 bottoms (far-end) opening insert, back slide plate 5 is to top (near-end) about 2mm that slides, slide plate 5 proximal annular rim structures 51 are fitted in the inboard corresponding grooves in first duct, make slide plate 5 be fixed in main nail 1 near-end inboard.
Then; To lead nail and 1 squeeze into, and assist down through the lag screw duct 112 to screw in lag screws 22 at seal wire, and control and advance to follow closely the degree of depth to correct position to correct position; Pressurize so that reach between fracture site, it is parallel with lag screw duct 112 top plan that lag screw is threaded to the dorsal part plane.Make inverted trapezoidal groove and lag screw 22 afterbodys of rectangle head screw 21 head veutros fall trapezoidal slide bar and carry out chimericly, and it is concordant to squeeze into 21 to two screw tail ends of rectangle head screw along glide direction.After this operation, be limited to the special geometric configuration of integrating a screw 2, the rotation displacement of femoral head and neck is limited, and making simultaneously becomes linear pressurization between two fracture portions.The tail medicated cap of screwing, thus prevent to produce between rectangle head screw 21 and the lag screw 22 along the relative motion of falling on the trapezoidal embeded slot direction; Tail medicated cap 23 can also produce impedance with main nail 1 lateral wall, prevents to integrate a screw 2 and wears out femoral head and pass to pelvic cavity.
Assist down at the guiding apparatus, 115 axis directions screw in second supporting screw 5 along the 3rd duct, make the second supporting screw top equal with main nail plane, 1 near-end medial wall, make it to bring into play to stop that slide plate 5 far-ends (also being the bottom) act on but do not support.Assist second duct, lower edge, 113 axis directions to screw in first supporting screw 3 at the guiding apparatus, stop precession when in the screw-in process, experiencing big resistance.And then continue precession second supporting screw 5 until receiving big resistance.At this moment, inboard supporting is just set up.Because the pliability of slide plate 5, thereby preventing under the heavy burden situation, to make fracture end produce the fine motion accelerating union of bone fracture when fracture site from subsiding.
Claims (6)
1. an integrated intramedullary nail system that is used to treat fractured near end of thighbone is characterized in that: comprise main nail (1), integrate a screw (2), first supporting screw (3), second supporting screw (4) and slide plate (5); Main nail (1) is by the titanium manufacturing; It comprises proximal part (11), transition portion (12) and (13) three parts of distal portions; It is 175-176 ° that the axis of proximal part (11) becomes angle α with the axis of distal portions (13), and transition portion (12) carries out nature and is connected transition between the two; Be respectively arranged with three ducts on the proximal part (11), be followed successively by first duct, second duct (113), the 3rd duct (115) of oblique setting from top to bottom with the substantially parallel setting in first duct; First duct comprises the lag screw duct (112) that is used to hold the rectangle head screw duct (111) of rectangle head screw (21) and is used to hold lag screw (22); Second duct (113) is positioned at the below in first duct and is close to first duct and is provided with, and the diameter of second duct (113) is little near the part of lateral wall near the part of medial wall, and second duct (113) have female thread in the part near the medial wall; Angle β between the axis in first duct and second duct and the axis of proximal part is 120 °; The 3rd duct (115) is used to hold second supporting screw (4), and the axis in the 3rd duct is vertical basically with the axis of proximal part (11); Proximal part (11) near having slideway (114) on the inner wall section; Slideway (114) is
shape; Also be
Slideway (114) is narrower near the part of near-end medial wall, and near the part broad of proximal part (11) core, slideway (114) bottom is lower than the 3rd duct (115), and the upper end arrives the bottom in first duct; Slide plate (5) comprises superposed slip ring (51) and is positioned at the rectangular sheet (52) of bottom; Slip ring (51) hollow; The size of its hollow space is basic identical with first duct with shape, and the rectangular sheet of bottom (52) width is less than the partial width of slideway (114) near the near-end medial wall; Slide plate (5) is processed by having flexible steel disc.
2. integrated intramedullary nail system as claimed in claim 1 is characterized in that: the thickness of slide plate is 0.5mm, and the length of bottom rectangle sheet and width are respectively 18mm and are 8mm.
3. integrated intramedullary nail system as claimed in claim 1 is characterized in that: the shape of cross section of proximal part (11) is rounded square basically; The cross section of distal portions (13) is circular.
4. integrated intramedullary nail system as claimed in claim 1 is characterized in that: integrate a screw (2) and comprise rectangle head screw (21), lag screw (22) and tail medicated cap (23).
5. integrated intramedullary nail system as claimed in claim 4; It is characterized in that: rectangle head screw (21) section is roughly the rectangular configuration of long 10mm, wide 3mm; Its abdominal part center has embeded slot, and this embeded slot can form perfect cooperation with the trapezoidal slide bar of falling of lag screw (22) back.
6. integrated intramedullary nail system as claimed in claim 5 is characterized in that: the afterbody of rectangle head screw (21) and lag screw (22) has external screw thread; The section of lag screw (22) is the sub-circular structure of 240 ° of diameter 12mm, radian.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102715208A CN101912299B (en) | 2010-09-03 | 2010-09-03 | Integrated intramedullary nail system for treating proximal femoral fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102715208A CN101912299B (en) | 2010-09-03 | 2010-09-03 | Integrated intramedullary nail system for treating proximal femoral fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101912299A CN101912299A (en) | 2010-12-15 |
| CN101912299B true CN101912299B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102715208A Expired - Fee Related CN101912299B (en) | 2010-09-03 | 2010-09-03 | Integrated intramedullary nail system for treating proximal femoral fracture |
Country Status (1)
| Country | Link |
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| CN (1) | CN101912299B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2362450Y (en) * | 1998-06-02 | 2000-02-09 | 潘滔 | Femur neck axial controlled inner bone marrow locking nail |
| US20050055024A1 (en) * | 2003-09-08 | 2005-03-10 | James Anthony H. | Orthopaedic implant and screw assembly |
| JP5060308B2 (en) * | 2004-12-31 | 2012-10-31 | シンセス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Intramedullary nail |
| US8100911B2 (en) * | 2008-06-30 | 2012-01-24 | Depuy Products, Inc. | Fracture fixation apparatus |
| CN101601605B (en) * | 2009-07-14 | 2011-01-05 | 常州市康辉医疗器械有限公司 | Intramedullary nail fixation device for fractured near end of thighbone |
| CN201551384U (en) * | 2010-03-02 | 2010-08-18 | 唐佩福 | Intramedullary fixation apparatus for intertrochanter fracture of femur |
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2010
- 2010-09-03 CN CN2010102715208A patent/CN101912299B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101912299A (en) | 2010-12-15 |
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Granted publication date: 20120321 Termination date: 20120903 |