• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    bone screw with elaborate threads. the present invention relates to a surgical screw for anchoring a flexible member to a bone. the screw may include a primary thread that has a continuous helical crest that curves around the screw stem. a set of secondary disks can be laid over, and following the continuous helical crest around the screw. the set of secondary threads can have the same periodicity as the primary thread. the primary thread may comprise both a sharp portion and a blunt portion to prevent damage to the flexible member.
    公开号:BR112013015210B1
    申请号:R112013015210-9
    申请日:2011-12-15
    公开日:2020-12-15
    发明作者:Leo Arieh Pinczewski
    申请人:Leo Arieh Pinczewski；
    IPC主号:
    专利说明:

    Background 1. Field of the present description.
    [001] The present description refers, in general, to surgical implants, and, more particularly, but not necessarily entirely, to surgical screws for anchoring flexible limbs, such as grafts, tendons, ligaments and implants, in bones during the surgery. 2. Description of the Related Technique.
    [002] Surgical screws are increasingly used by orthopedic surgeons to repair injuries. In particular, surgical screws can be used to anchor flexible limbs, such as grafts, tendons, ligaments or implants in a bone. In a typical surgery, a hole is first prepared by the surgeon in the bone. A free end of the flexible member can then be inserted into the hole by the surgeon. The surgeon can then install a surgical screw in the hole. The surgical screw may include threads that engage the side wall of the hole in order to secure the flexible member in the hole. The surgical screw can secure the flexible member to the bone by stapling the flexible member against the side wall of the hole.
    [003] In some cases, the high tension imposed on the bone screws currently available causes the flexible limb to be damaged. In other cases, it causes the flexible member to be removed while the surgical screw remains stuck in the hole, due to an inadequately weak engagement between the screw and the flexible member.
    [004] In still additional cases, the high tension in the flexible member can cause the surgical screw itself to withdraw from the hole and release the flexible member.
    [005] In an attempt to reduce these problems, some previously available surgical screws have been designed with features for improved engagement, such as sharper and larger threads that provide a safer engagement on the side walls of the hole in the bone. However, the use of sharper and larger threads inadvertently causes the flexible member to fail as the threads can section or weaken the flexible member. Attempts to minimize damage to the flexible limb while improving the engagement between surgical screws and bone have been made, but with limited success.
    [006] An attempt to prevent graft or tendon damage is described in US Patent 5,383,878 (hereinafter "the '878 Patent"), which was granted on January 24, 1995 to the applicant, however, the risk of removing the flexible member is increased. The '878 patent describes a surgical screw that has a body with a thread formed along the body. The thread formed along the body is devoid of an outer cut line. In particular, the thread on the body has a smooth or smooth thread in order to provide an interlocking fixation of a bone end of a graft tendon within a prepared hole in a bone. Stated in another way, the threads of the surgical screw of the '878 patent do not have an outer cut line that would follow the ridge of the thread in a normal and helical way. The surgical screw of the '878 patent was an improvement over the previously available surgical screws in which its threads did not cut, and therefore did not damage the graft during implantation. Although the '878 patent surgical screw has been successful in minimizing graft damage caused by "sharp" threads, the soft threads of the' 878 patent surgical screw may not always prevent the graft or tendon from coming out, or removing of the bone screw. For example, the use of "soft threads" can cause the surgical screw to recede from the bone orifice after implantation.
    [007] Another attempt to prevent damage to the graft or tendon is disclosed in US Patent 6,589,245 (hereinafter "the Patent‘ 245 "), which was granted on July 8, 2003 to Weiler et al. The '245 patent describes an interference screw having a sharp thread disposed adjacent to the penetrating end and a blunt thread in the next region. The purpose of the blunt thread is to ensure that the transplant tissue is not sectioned or separated in the blunt thread area. Although an improvement, the reduced pressure or force imposed by the interference screw described in the '245 Patent on the graft or tendon presents an increased risk of failure to prevent the graft or tendon from coming out, and the screw itself is at risk of coming out of a hole .
    [008] The prior art is thus characterized by several disadvantages that are addressed by the present description. This description minimizes and, in some respects, eliminates the resources mentioned above and other problems when using the structural methods and resources disclosed in this document. .
    [009] It seems to the applicant that the reason for all the other bone screws is to increase their grip on the bone. On the contrary, a key point of the present description is to increase the grip on the flexible member (for example, in the graft or tendon) and to prevent the flexible member from leaving the bone.
    [0010] In the applicant's experience, the bone screw can be retained in the hole, even if the tendon for which it is responsible has left the hole. Surgeons are usually concerned with keeping the screw in the bone, but, in fact, the reason for the surgery should be to keep the tendon (flexible limb) in position in the bone. is to improve the withdrawal force needed to displace the flexible member. This purpose is not addressed by either the '245 Patent or the' 878 Patent. The present description describes a new and innovative screw that holds the flexible member in place in the bone, while increasing the grip of the screw itself to the bone, minimizing damage to the flexible member, and still allows easier removal of the screw from the bone without damage additional to the surrounding tissue or bone.
    [0011] The features and advantages of this description will be presented in the description that follows and, in part, will be apparent from the description or may be learned by practicing this description without undue experimentation. The features and advantages of the present description can be realized and obtained through the instruments and combinations particularly pointed out in the attached claims. Brief Description of Drawings
    [0012] The features and advantages of the description will become apparent from a consideration of the subsequent detailed description in connection with the accompanying drawings, in which: Figure 1 is a side view of a surgical screw in accordance with one embodiment of the present description ; Figure 2 is a cross-sectional side view of the surgical screw shown in Figure 1; Figure 3 is a perspective view of the surgical screw shown in Figure 1; Figure 4 is a perspective view of the surgical screw shown in Figure 1; Figure 5 is a side view of a surgical screw in accordance with an embodiment of the present description; Figure 6 is a cross-sectional side view of the surgical screw shown in Figure 5; Figure 7 is a perspective view of a surgical screw in accordance with an embodiment of the present description; Figure 8 is a perspective view of the surgical screw shown in Figure 7; Figure 9 is a side view of the surgical screw shown in Figure 7; Figure 10 is a cross-sectional side view of the surgical screw shown in Figure 7; Figure 11 is a side view of a surgical screw in accordance with an embodiment of the present description; Figure 12 is a side view of a surgical screw in accordance with an embodiment of the present description; and Figures 13 and 14 represent a method of anchoring a flexible member to a bone in accordance with an embodiment of the present description. Detailed Description
    [0013] In order to promote an understanding of the principles according to the description, reference will now be made to the modalities illustrated in the drawings and a specific language will be used to describe it. It should be noted, however, that any limitation of the scope of the description is thus intentional. Any additional changes and modifications to the features of the invention illustrated in this document and any additional applications of the principles of the description, as illustrated in this document, which would normally occur to those skilled in the relevant art and in possession of this description are considered to be within the scope of the claimed description.
    [0014] It should be noted that, as used in this specification and in the appended claims, the singular forms "one (a)" and "the (a)" include referents in the plural unless the context dictates clearly the contrary.
    [0015] When describing and claiming the present description, the following terminology will be used according to the definitions presented below.
    [0016] As used in this document, the terms "comprising", "including", "containing", "characterized by", and grammatical equivalents thereof are inclusive or open terms that do not exclude elements or steps of the method unreported and additional.
    [0017] The applicant presents an improved surgical screw, or interference device, which minimizes thread damage to flexible members, reduces the risk of the flexible member coming out, reduces the risk of the screw coming out and allows easier screw removal when needed in the future without further damage to the surrounding tissue or bone. The applicant's surgical screw may include a double-acting thread. For example, the threads of the applicant's surgical screw may have a shape factor that varies along the length of the screw. The threads close to the distal end of the screw can have a sharp cut line for improved engagement with the side wall of a hole in a bone while the threads towards the proximal end can have a "smooth" cut line to reduce damage to the grafts.
    [0018] The applicant's surgical screw may further comprise a primary thread and a set of secondary threads. The set of secondary threads can be arranged on, and follow, the primary thread as it winds around the stem of the surgical screw. A height or breadth of the primary thread can be significantly greater than the height or breadth of the set of secondary threads. The primary thread and the secondary thread set can be coextensive along the stem of the surgical screw.
    [0019] The applicant's surgical screw can operate to decrease the risk of the attached flexible limb leaving the bone, while the surgical screw remains fixed in the hole. The applicant's surgical screw can also reduce sliding incidences between the flexible member and the surgical screw. The applicant's surgical screw is also designed to prevent the bone screw from leaving the bone itself. Thus, it should be noted that the applicant's surgical screw can increase the grip on the flexible member and prevent the flexible member, or the screw itself, from leaving the bone.
    [0020] The applicant's surgical screw may include a macro shape that engages the bone and also a micro-coupling feature to prevent the flexible member from being removed from a hole while the surgical screw remains in place. The nature of the micro coupling feature of the present description is unique in that it improves the resistance to removal of the flexible member without understanding the ability of the surgical screw to be inserted or extracted.
    [0021] Referring now to Figures 1 to 4, a surgical screw 100 is shown in accordance with one embodiment of the present description. In one embodiment of the present description, the screw 100 may be a tapered screw as shown. Screw 100 may comprise a screw head 102 and a stem member 104. Screw 100 may extend from a proximal end 106 to a distal end 108. Screw head 102 may be located at proximal end 106. The The stem member 104 itself may extend from the screw head 102 to the distal end 108 of the screw 100. The stem member 104 of the screw 100 may comprise threads 110. As will now be described, the thread shape of the threads 110 may vary over time. along the length of the stem member 104, which means that the shape, path and physical space occupied by the threads 110 can vary along the length of the stem member 104. Stated differently, the thread 110 can vary in size, thickness , format, spacing or in any suitable physical manner.
    [0022] Threads 110 may comprise a first portion of thread 112 and a second portion of thread 114. The first portion of thread 112 may extend a distance of D1 from the distal end 108 of the screw 100 towards the direction of the proximal end 106 of screw 100 as shown in Figure 2. The second thread portion 114 can extend a distance of D2 from the end of the first thread portion 112 towards the proximal end 106 of screw 100 as also shown in Figure 2. The second thread portion 114 may terminate at the head 102 of the screw 100.
    [0023] As perhaps best seen in Figure 2, but visible in other Figures as well, the topography of the surface or thread form of threads 110 varies along the stem member 104 of screw 100. In particular, threads 110 in the first thread portion 112 may comprise a sharper cutting line 116 than threads 110 in the second thread portion 114. The threads 110 in the second thread portion 114 may be more rounded than the threads 110 in the first thread portion 112. The threads 110 in the second thread portion 114 may comprise a more sinusoidal shape than the threads 110 in the first thread portion 112. In an embodiment of the present description, the threads 110 in the first thread portion 112 may be more in V shape than the threads threads 110 in the second thread portion 114.
    [0024] In one embodiment of the present description, the threads 110 in the first thread portion 112 may have a sharper thread ridge 120 than a thread ridge 122 of the threads 110 in the second portion 114. In an embodiment of the present description, the threads threads 110 in the first portion of thread 112 may have a stronger penetration into the bone than threads 110 in the second portion 114. In an embodiment of the present description, threads 110 in the first portion of thread 112 may form a higher pressure between the ridge thread 120 and the bone (not shown) that the thread cap 122 of threads 110 in the second portion 114. In one embodiment of the present description, the threads 110 in the first thread portion 112 may have a more pressure thread shape high while the threads 110 in the second portion 114 may have a lower pressure thread shape. (A sharper thread concentrates a screw force in a smaller area resulting in a higher force per unit area and thus a higher pressure.) In one embodiment of the present description, the thread shape along the member of shank 104 of screw 100 varies along its length, where the sharpening of threads 110 decreases as threads 110 approach proximal end 106.
    [0025] In an embodiment of the present description, the length, D1, of the first thread portion 112 can be approximately 20 to 40% of the length D3, of the screw 100, or the length D1 can be approximately 40% to 60% of the length , D3, of screw 100, depending on the mode. In an embodiment of the present description, the length, D2, of the second thread portion 114 can be approximately 50% to 70% of the length, D3, of the screw 100, or about 60%. In an embodiment of the present description, the threads 110 in the second thread portion 114 can be fully round in their largest diameter and extend over a similar total radius in the root diameter of the threads 110.
    [0026] Referring now to Figures 5 and 6, a surgical screw 200 is shown in line with an embodiment of the present description. Screw 200 may have all, some or none of the features of screw 100 described in relation to Figures 1 to 4, above. As shown in Figures 5 and 6, screw 200 may comprise a head 202 and a stem member 204. The stem member 204 may comprise threads 206. The stem member 204 may include a first portion of thread 208 and a second portion thread 210. As explained above, threads 206 of the first thread portion 208 may have a sharper cut line than threads 206 of the second thread portion 210.
    [0027] The screw 200 may also comprise an external surface 212. Formed on the surface 212, it may have a micro-texture 214. The micro-texture 214 can increase the coefficient of friction of the screw 200 to prevent the sliding of a tendon or graft. The microtexture 214 can be characterized by surface roughness parameters (by definition of ISO) 0.2 to 2.0 Ra and 4 to 20 Rz. The microtexture 214 can be produced using the following machining: cutting depth 0.1 mm to 0.3 mm, pitch 0.1 to 0.5 mm and cutting edge radius from 0.075 mm to 0.2 mm. The microtexture 214 on the outer surface 212 may comprise serrated edges. The microtexture 214 on the outer surface 212 can comprise roughness.
    [0028] In an embodiment of the present description, screws 100 and 200 can be formed using an injection molding process. Screws 100 and 200 can be formed by elaborate threads.
    [0029] Referring now to Figures 7 to 10, a surgical screw 300 is shown according to an embodiment of the present description. The screw 300 may comprise a screw head 302 and a stem member 304. The screw 300 may extend from a proximal end 306 to a distal end 308. The screw head 302 can be located at the proximal end 306. The rod member 304 can extend from screw head 302 to distal end 308 of screw 300. Formed in screw head 302 it can be a recess or socket 310 that has a surface 312 configured and adapted to receive a drive rod of a tool (not shown).
    [0030] The screw 300 may comprise a primary thread 320 extending from the distal end 308 towards the proximal end 306. The primary thread 320 may comprise a continuous helical crest 322 which coils on the stem member 304. primary thread 320 can be separated by grooves 321, and the primary thread is further defined by side walls 323. A thread width of primary thread 320, indicated by double arrows marked with reference number 350 in Figure 9, can increase in distal to proximal direction. A thread height or primary thread width 320, indicated by the double arrows marked with reference number 352 in Figure 9, can decrease in the distal to proximal direction.
    [0031] The primary thread 320 may comprise a first portion 324 and a second portion 326. The first portion 324 may be closer to the distal end 308, which means, as part of a distal section 338. The second portion 326 may follow sequentially the first portion 324 and extends towards the proximal end 306, which means, as part of a proximal section 340. A cutting edge 324A of the first portion 324 can be sharper than a cutting edge 326A of the second portion 326 The transition between the first portion 324 and the second portion 326 may be abrupt. Alternatively, the transition between the first portion 324 and the second portion 326 may be gradual.
    [0032] Despite being part of the same primary thread 320, the shape of primary thread 320 in the first portion 324 and in the second portion 326 may vary. The first portion 324 and the second portion 326 can together define a thread length of the primary thread 320. In one embodiment of the present description, the first portion 326 can extend approximately 50% to 70% of the length of the primary thread 320. In In one embodiment of the present description, the second portion 326 can extend about 50% to 70% of the length of the primary thread 320 and can, for example, extend about 60% of that length.
    [0033] A set of secondary threads 328 can also be arranged on the stem member 304 of screw 300. In an embodiment of the present description, the set of secondary threads 328 can comprise a single thread or a plurality of threads. For example, the Secondary thread set 328 may comprise one thread, one thread, three threads, four threads or more threads.
    [0034] In an embodiment of the present description, the set of secondary threads 328 can be arranged on, and follow, the continuous helical crest 322 of the primary thread 320. In an embodiment of the present description, the set of secondary threads 328 can be arranged at the peaks of the continuous helical crest 322 of the primary thread 320. In an embodiment of the present description, the set of secondary threads 328 may be present or absent in the grooves 321 between the undulations or peaks of the primary thread 320.
    [0035] The secondary thread set 328 can start at the primary thread 320, starting at an upper portion of the stem member 304 and extends towards the proximal end 306 of the screw 300. The secondary thread set 328 can extend in the direction proximal closer to the proximal end 306 of the screw 300 than the primary thread 320. That is, the secondary threads 328 may extend beyond the primary thread 320 in the proximal direction on the stem member 304. Conversely, the primary thread 320 may extend to the distal end 308 of the screw 300 while the secondary threads 328 may not reach the distal end 308.
    [0036] The primary thread 320 can have a periodicity, for example, axial length by undulation, which means the axial distance along a longitudinal geometric axis 309 of the screw 300 per revolution of the primary thread 320 as shown in Figure 9. The set of secondary threads 328 can also have a periodicity. In an embodiment of the present description, the periodicity of the primary thread 320 and the secondary thread assembly 328 may be the same or substantially the same. The primary thread 320 may comprise a thread height and the secondary thread assembly 328 may also comprise a thread height. In an embodiment of the present description, the thread height of the secondary thread set 328 may be 20% or less than the height of the primary thread 320. In an embodiment of the present description, the thread height of the secondary thread set 328 may be 10% or less than the height of the primary thread 320. As can be seen in a better way in Figure 10, the surgical screw 300 can include a hollow passage or cannulation 330.
    [0037] Referring now to Figure 11, a surgical screw 400 is shown according to an embodiment of the present description. Screw 400 may comprise a screw head 402 and a stem member 404. Screw 400 may extend from a proximal end 406 to a distal end 408. Screw head 402 may be located at proximal end 406. The stem member 404 can extend from screw head 402 to distal end 408 of screw 400.
    [0038] The screw 400 may comprise a primary thread 410 that extends from the distal end 408 towards the proximal end 406. The primary thread 410 may comprise a continuous helical crest 412 that coils around the stem member 404. of primary thread 410 can be separated by grooves 414. The shape of primary thread 410 can be substantially the same as primary thread 320 of surgical screw 300 as described above.
    [0039] A set of secondary threads 420 can also be arranged on the stem member 404 of screw 400. In an embodiment of the present description, the set of secondary threads 420 may comprise a single thread or a plurality of threads. For example, the secondary thread set 420 may comprise a thread, a pair of threads, three threads or four threads.
    [0040] In an embodiment of the present description, the set of secondary threads 420 can be arranged on, and follow, the continuous helical crest 412 of the primary thread 410. In an embodiment of the present description, the set of secondary threads 420 can be arranged at the peaks of the continuous helical crest 412 of the primary thread 410. In an embodiment of the present description, the secondary thread set 420 may be absent in the grooves 414 between the undulations of the primary thread 410.
    [0041] In an embodiment of the present description, the set of secondary threads 420 may extend from distal end 408 of surgical screw 400 towards the proximal end 406 of surgical screw 400 following the continuous helical crest 412 of primary thread 410 and above grooves 414. In one embodiment, the set of secondary threads 420 may be coextensive with the primary thread 410. In one embodiment, the set of secondary threads 420 may extend beyond the end of primary thread 410 towards the proximal end 406 .
    [0042] Referring now to Figure 12, a surgical screw 500 is shown according to an embodiment of the present description. The screw 500 can comprise a screw head 502 and a stem member 504. The screw 500 can extend from a proximal end 506 to a distal end 508. The screw head 502 can be located at the proximal end 506. The stem member 504 can extend from screw head 502 to distal end 508 of screw 500.
    [0043] The screw 500 may comprise a primary thread 510 that extends from the distal end 508 towards the proximal end 506. The primary thread 510 may comprise a continuous helical crest 512 that coils around the stem member 504. of primary thread 510 can be separated by grooves 514. The shape of primary thread 510 can be substantially the same as primary thread 320 of surgical screw 300 as described above.
    [0044] A set of secondary threads 520 can also be arranged on the stem member 504 of screw 500. In an embodiment of the present description, the set of secondary threads 520 can comprise a single thread or a plurality of threads. For example, the secondary thread set 520 may comprise a thread, a pair of threads, three threads or four threads.
    [0045] In an embodiment of the present description, the set of secondary threads 520 may extend from the distal end 508 of the surgical screw 500 towards the proximal end 506 of the surgical screw 500 along the continuous helical crest 512 of the primary thread 510 and in the grooves 514. In one embodiment, the set of secondary threads 520 may be coextensive with the primary thread 510. In one embodiment, the set of secondary threads 520 may extend beyond the end of the primary thread 510 towards the proximal end 506.
    [0046] Referring now to Figures 13 and 14, there is shown a process for anchoring a flexible member 600 in a bone 602 using the surgical screw 300. It should be noted that any of the surgical screws disclosed in this document can be used in place of surgical screw 300. To begin with, a hole 604 can be formed in bone 602 as is known to that of ordinary skill in the art, using, for example, a surgical drill. Once hole 604 is formed, flexible member 600 can be installed in hole 604.
    [0047] The surgical screw 300 can then be installed and advanced into hole 604 using a tool 606 that turns the screw 300. As the screw 300 is first advanced, the primary thread 320 near the distal end 308 can engage a side wall 608 from hole 604 and flexible member 600. As the screw 300 is advanced, the secondary thread set 328 can engage the side wall 608 of hole 604 and the flexible member 600. When fully installed, as shown in Figure 14, both primary thread 320 and secondary thread set 328 can engage side wall 608 of bore 604 and flexible member 600.
    [0048] It should be noted that double engagement of both primary thread 320 and secondary thread set 328 on side wall 608 of hole 604 enhances the ability of screw 300 to resist the outlet and allows screw 300 to be removed without additional damage to any tissue or bone. The addition of the secondary threads 328 allows in particular an increased grip on the flexible member 600 and a simultaneous increase in the grip of the screw 300 on the side walls of the bone 608, and still without undue resistance to a future removal of the screw 300: in short, simply unscrew the screw 300 to remove it. The set of secondary threads 328 can engage the side wall 608 in the depression formed by the primary thread 320. It should be noted, therefore, that the insertion torque and the removal torque are not much or are not affected, because the torque is a function of the threaded coupling between the screw 300 and the fabric. That is, although screw 300 can be easily installed and removed with the use of a tool, screw 300 can also provide improved resistance to withdrawal, due to the double engagement by both the primary thread and the secondary thread, and still allow easy removal by simply unscrewing screw 300. Screw 300 thus prevents further damage to flexible member 600 or bone 602 during removal.
    [0049] It should be noted that the structure and apparatus disclosed in this document is merely an example of a means to prevent the removal of a surgical screw, and it should be noted that any structure, apparatus or system to prevent the removal of a surgical screw that performs the same or equivalent functions as those disclosed in this document are intended to be within the scope of a means to prevent the removal of a surgical screw, including those structures, apparatus or systems to prevent the removal of a surgical screw that are currently known, or may become available in the future. Anything that works in the same way, or equivalent, as a means to prevent the removal of a surgical screw is within the scope of that element.
    [0050] According to the features and combinations described above, a useful method for fixing a flexible member includes the steps of: (a) drilling a hole in a bone; and (b) securing the flexible member to the hole using a surgical screw; wherein the surgical screw comprises a head and a stem member, the stem member having a first thread portion and a second thread portion; wherein the first thread portion has sharper threads compared to the threads of the second thread portion.
    [0051] According to the features and combinations described above, a useful method for fixing a flexible member includes the steps of: (a) drilling a hole in a bone; and (b) securing the flexible member to the hole using a surgical screw; (c) that the surgical screw comprises an external surface; wherein the outer surface comprises a microtexture formed thereon.
    [0052] According to the features and combinations described above, a useful method for fixing a flexible member includes the steps of: (a) drilling a hole in a bone; and (b) securing the flexible member to the hole using a surgical screw; wherein the surgical screw comprises an external surface; wherein the outer surface comprises a primary thread and a set of secondary threads.
    [0053] One embodiment of the present description can include a surgical screw that has a stem member with a longitudinal geometric axis, a first thread portion that extends along a first length of the stem member and a second thread portion that extends along a second length of the stem member, wherein the first thread portion has a cutting edge that is sharper than the second thread portion.
    [0054] One embodiment of the present description may include a surgical screw that has a stem member with a longitudinal geometric axis, a thread that extends along a length of the stem member, in which a topography of the surface or shape of the thread thread varies along the length of the stem member.
    [0055] One embodiment of the present description may include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises a double-acting thread.
    [0056] One embodiment of the present description may include a surgical screw having a rod member with a longitudinal geometric axis, wherein said rod member comprises a thread, said thread having a non-uniform thread shape.
    [0057] One embodiment of the present description can include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises a varied thread.
    [0058] One embodiment of the present description can include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises a distal end and a proximal end, a thread extending from the distal end towards the proximal end, where the thread is sharper at the distal end of the stem member.
    [0059] One embodiment of the present description may include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises a distal end and a proximal end, a thread extending from the distal end in the direction of the proximal end, where the thread shape varies along the screw stem member.
    [0060] One embodiment of the present description may include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises a distal end and a proximal end, with a thread extending from the distal end towards the proximal end, where the thread forms a high pressure at the distal end and a low pressure at the proximal end when the screw stem member is installed in the hole in a bone.
    [0061] One embodiment of the present description can include a surgical screw that has a rod member with a longitudinal geometric axis, wherein said rod member comprises threads that engage a hole wall with a high pressure close to the distal end of the screw and a low pressure towards the proximal end of the screw.
    [0062] One embodiment of the present description may include a surgical screw having a rod member with a longitudinal geometric axis, wherein said rod member comprises threads. The threads can comprise a microtexture for improved engagement in bone and graft.
    [0063] One embodiment of the present description may include a surgical screw that has an outer surface, the outer surface of which comprises a microtexture formed therein.
    [0064] One embodiment of the present description may include a surgical screw that has an outer surface, the outer surface of which comprises serrated edges.
    [0065] One embodiment of the present description can include a surgical screw that has a primary thread and a set of secondary threads, wherein the set of secondary threads is arranged on the primary thread.
    [0066] One embodiment of the present description may include a surgical screw that has a primary thread that has a thickness and an amplitude, in which the thickness increases and the amplitude decreases in the distal to the proximal direction.
    [0067] One embodiment of the present description may include a surgical screw that has a primary thread and a set of secondary threads, wherein the set of secondary threads are arranged on the peaks of the primary thread.
    [0068] Those who have common skill in the relevant technique will note the advantages provided by the resources of this description. For example, it is a feature of the present description to provide a double threaded surgical screw. Another feature of the present description is to provide such a screw with microtexture to prevent the tendon or graft from sliding. It is also a feature of the present description, according to one aspect of the same, to provide an injection molded surgical screw formed of threads elaborated with a double thread shape and microtexture.It is a feature of the present description to provide a surgical screw that has a primary thread and a set of secondary threads.
    [0069] In the aforementioned Detailed Description, several resources of this description are grouped in a single modality with the purpose of making the description more dynamic. This method of description should not be interpreted as reflecting an intention that the claimed description needs more resources that are expressly cited in each claim. Preferably, as the following claims reflect, the aspects of the invention are found in less than all the resources of a single previous modality. Thus, the claims are hereby incorporated into that Detailed Description of the description as a reference, where each claim is sustained as a modality of the present description.
    [0070] It should be understood that all the provisions described above are only illustrative of the application of the principles of this description. Numerous modifications and alternative provisions can be developed by those skilled in the art without departing from the spirit and scope of the present description and the appended claims are intended to cover such modifications and provisions. Thus, although the present description has been shown in the drawings and described above with particularity and detail, it will be apparent to those of ordinary skill in the art that numerous modifications, including, but not limited to, variations in size, materials, shape, shape, function and the way of operation, assembly and use can be done without separating from the principles and concepts presented in this document.
    权利要求:
    Claims (23)
    [0001]
    1. Apparatus (300) for anchoring a flexible member (600) in a hole into which the flexible member (600) is inserted when engaging a side wall of the hole (604) formed in a bone (602), the apparatus comprising: a rod member (304) having a proximal end (306) and a distal end (308); a primary thread (320) disposed on the stem member and extending from the distal end (308) towards the proximal end (306); and one or more secondary threads arranged on the primary thread, characterized by the fact that: a thread height of the primary thread (320) decreases in the distal to the proximal direction, and the secondary threads (328) are coextensive with the primary threads (320 ), and secondary threads (328) are formed over a portion including grooves (321) of the primary threads (320).
    [0002]
    Apparatus (300) according to claim 1, characterized in that the secondary threads (328) extend along an upper portion of the primary thread (320).
    [0003]
    Apparatus (300) according to claim 1, characterized in that the secondary threads (328) extend beyond the primary thread (320) in the proximal direction along the stem member (304).
    [0004]
    Apparatus (300) according to claim 1, characterized in that it comprises a head (302) arranged at the proximal end (306) of the stem member (304), wherein the head comprises an engaging surface (312 ) configured and dimensioned to receive a tool driving rod in a dockable manner.
    [0005]
    Apparatus (300) according to claim 1, characterized by the fact that the primary thread (320) has a periodicity and the secondary threads (328) have a periodicity, in which the periodicity of the primary thread (320) and the secondary threads are equal.
    [0006]
    Apparatus (300) according to claim 1, characterized in that the primary thread (320) comprises a continuous helical crest (322) wound around the stem member (304), in which the secondary threads (328) are arranged on, and follow on the continuous helical crest (322) of the primary thread (320) around the stem member (304).
    [0007]
    Apparatus (300) according to claim 6, characterized in that the secondary threads (328) are additionally arranged between the undulations of the continuous helical crest (322).
    [0008]
    Apparatus (300) according to claim 1, characterized in that the primary thread (320) comprises a first portion (324) and a second portion (326), the first portion (324) and the second portion ( 326) each having an end edge, the end edge of the first portion (324) being sharper than the end edge of the second portion (326).
    [0009]
    Apparatus (300) according to claim 8, characterized in that the secondary threads (328) are coextensive only with the second portion (326) of the primary thread (320).
    [0010]
    Apparatus (300) according to claim 1, characterized in that the secondary threads (328) consist of a single thread.
    [0011]
    Apparatus (300) according to claim 1, characterized in that the secondary threads (328) comprise a plurality of threads.
    [0012]
    Apparatus (300) according to claim 1, characterized in that it comprises a microtexture on a surface of the stem member (304).
    [0013]
    Apparatus (300) according to claim 1, characterized in that the primary thread (320) comprises a thread height and the secondary threads (328) comprise a thread height, wherein the thread height of the threads secondary threads (328) is less than 20% of the height of the primary thread (320).
    [0014]
    14. The apparatus (300) according to claim 1, characterized by the fact that the flexible limb is human tissue.
    [0015]
    15. The apparatus (300) according to claim 1, characterized by the fact that: the stem member (304) extends between a proximal end (306) and a distal end (308), and has a surface; the primary thread (320), disposed on the surface of the stem, comprises a continuous helical crest (322) wound on the stem member (304), the crest having a peak; and, one or more secondary threads (328) are arranged at the peak of the crest of the primary thread (320), where a thread height of the primary thread decreases in the distal to proximal direction, and the secondary threads (328) are coextensive with the primary threads (320), and the secondary threads (328) are formed over a portion including grooves of the primary threads (320).
    [0016]
    Apparatus (300) according to claim 15, characterized in that it comprises a head disposed on the rod member (304) adjacent to the proximal end (306), wherein the head comprises an engaging surface configured and dimensioned for receive a drive member in a dockable manner.
    [0017]
    Apparatus (300) according to claim 15, characterized in that the primary thread (320) comprises a first portion adjacent to the distal end of the stem member (304) and a second portion that follows the first portion, the first portion having an edge that is sharper than an edge of the second portion.
    [0018]
    18. The apparatus (300) according to claim 15, characterized by the fact that the flexible member is a ligament.
    [0019]
    19. The apparatus (300) according to claim 15, characterized by the fact that the secondary threads (328) consist of a single thread.
    [0020]
    Apparatus (300) according to claim 15, characterized in that the secondary threads (328) comprise at least two threads.
    [0021]
    Apparatus (300) according to claim 15, characterized in that the secondary threads (328) reside only at the peak of the primary thread crest (320), and do not reside in any side wall or groove of the primary thread ( 320).
    [0022]
    Apparatus (300) according to claim 15, characterized in that the number of secondary threads (328) per peak of the primary thread crest (320) increases in a direction distal to a proximal direction.
    [0023]
    Apparatus (300) according to claim 1, characterized by the fact that: the stem member (304) has a proximal end (306) and a distal end (308); the primary thread (320) is arranged on the stem member (304) and extends from the distal end (308) towards the proximal end (306); the one or more secondary threads are arranged on the primary thread; a head is disposed at the proximal end of the stem member (304), the head of which comprises an engaging surface configured and dimensioned to receive a tool driving rod attactically; the secondary threads extend along an upper portion of the primary thread (320); the secondary threads (328) extend beyond the primary thread (320) in the proximal direction along the stem member; the primary thread (320) has a periodicity and the secondary threads have a periodicity, in which the periodicity of the primary thread (320) and the periodicity of the secondary threads are the same; the primary thread (320) comprises a continuous helical crest that coils on the stem member, the secondary threads are arranged on, and follows on the continuous helical crest of the primary thread (320) around the stem member (304); the secondary threads (328) are arranged between the undulations of the continuous helical crest (322); the primary thread (320) comprises a first portion and a second portion, the first portion and the second portion, each having an end edge, the end edge of the first portion being sharper than the end edge of the second portion; the secondary threads (328) comprise a plurality of threads; the primary thread (320) comprises a thread height and the secondary threads (328) comprises a thread height, where the thread height of the secondary threads (328) is less than 20% of the height of the primary thread (320), where a thread height of the primary thread decreases in the distal to the proximal direction, and the secondary threads (328) are coextensive with the primary threads; and, the secondary threads (328) are formed in a portion including grooves of the primary threads (320).
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    同族专利:
    公开号 | 公开日
    JP2016190079A|2016-11-10|
    AU2016200985A1|2016-03-03|
    BR112013015210A2|2016-09-13|
    WO2012080846A2|2012-06-21|
    EP2651322A2|2013-10-23|
    JP2014508550A|2014-04-10|
    US20120158137A1|2012-06-21|
    RU2013130919A|2015-01-20|
    RU2600284C2|2016-10-20|
    AU2011342906B2|2016-03-03|
    ZA201304230B|2014-02-26|
    MX2013006872A|2013-11-22|
    JP6334168B2|2018-05-30|
    WO2012080846A3|2012-08-23|
    CN103648422A|2014-03-19|
    AU2011342906A1|2013-07-11|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-17| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-07-21| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-10-13| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-15| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 15/12/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US42356610P| true| 2010-12-15|2010-12-15|
    US61/423,566|2010-12-15|
    US13/327,727|2011-12-15|
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    US13/327,727|US20120158137A1|2010-12-15|2011-12-15|Peek-rich bone screw|
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