WO2025122702A1 - Plaques pour fracture du fémur proximal à usage vétérinaire - Google Patents

Plaques pour fracture du fémur proximal à usage vétérinaire Download PDF

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Publication number
WO2025122702A1
WO2025122702A1 PCT/US2024/058603 US2024058603W WO2025122702A1 WO 2025122702 A1 WO2025122702 A1 WO 2025122702A1 US 2024058603 W US2024058603 W US 2024058603W WO 2025122702 A1 WO2025122702 A1 WO 2025122702A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
proximal
bone plate
proximal femur
recited
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2024/058603
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English (en)
Inventor
Jerome GULVAS
Matthew HOUBRE
Christoph CHRONZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arthrex Inc
Original Assignee
Arthrex Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arthrex Inc filed Critical Arthrex Inc
Publication of WO2025122702A1 publication Critical patent/WO2025122702A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur

Definitions

  • Canines, felines, or other animals may suffer a bone fracture as a result of a traumatic impact. Bone fractures are typically repaired using a combination of a bone plate and fixation screws.
  • This disclosure is directed to bone plates for repairing proximal femur fractures in animals, such as canines, for example.
  • An exemplary proximal femur bone plate designed for veterinary use may include, inter alia, a shaft portion, a head portion, a bone contacting surface, and an outer surface opposed to the bone contacting surface.
  • the head portion includes a distal section that is angled at an inclined angle relative to the shaft portion and a proximal tip section that is angled at a declined angle relative to the distal section.
  • the inclined angle and the declined angle are configured to accommodate a curvature of a greater trochanter of a proximal femur.
  • proximal femur bone plate designed for veterinary use may include, inter alia, a shaft portion including a distal tip section and a proximal straight section, and a head portion including a distal section and a proximal tip section.
  • the head portion is bounded by a peripheral edge that connects the head portion to a first side and a second side of the proximal straight section.
  • the peripheral edge includes a first curved expanded section that connects the distal section to the first side of the proximal straight section and a second curved expanded section that connects the distal section to the second side of the proximal straight section.
  • the first curved expanded section and the second curved expanded section are configured to accommodate a flared anatomy of a subtrochanteric region of a proximal femur.
  • Figure 1 illustrates select portions of a canine musculoskeletal system.
  • a proximal femur of the canine includes a fracture.
  • Figure 2 is a top view of a bone plate for repairing a proximal femur fracture.
  • Figure 3 is a bottom view of the bone plate of Figure 2.
  • Figure 4 is a side view of the bone plate of Figure 2.
  • Figure 5 illustrates the bone plate of Figures 2-4 positioned relative to a proximal femur of a canine.
  • Figures 6(a), 6(b), and 6(c) illustrate multiple views of a bone plate having a right orientation.
  • This disclosure is directed to bone plates designed for veterinary use.
  • the bone plates could be utilized for repairing proximal femur fractures in canines or felines.
  • An exemplary proximal femur bone plate designed for veterinary use may include, inter alia, a shaft portion, a head portion, a bone contacting surface, and an outer surface opposed to the bone contacting surface.
  • the head portion includes a distal section that is angled at an inclined angle relative to the shaft portion and a proximal tip section that is angled at a declined angle relative to the distal section.
  • the inclined angle and the declined angle are configured to accommodate a curvature of a greater trochanter of a proximal femur.
  • the proximal femur is a canine proximal femur
  • the bone contacting surface includes a concave curvature for conforming to a contour of the canine proximal femur.
  • the head portion includes a first width that is greater than a second width of the shaft portion.
  • a plurality of openings, at least one K-wire hole, and at least one suture hole are formed through the head portion.
  • a plurality of openings and at least one K-wire hole are formed through the shaft portion.
  • the head portion is bounded by a peripheral edge that connects the head portion to a first side and a second side of the shaft portion.
  • the peripheral edge includes a first curved expanded section that connects the distal section to the first side of the shaft portion and a second curved expanded section that connects the distal section to the second side of the shaft portion.
  • first curved expanded section and the second curved expanded section are configured to accommodate a flared anatomy of a subtrochanteric region of the proximal femur.
  • a first opening is provided proximate the first curved expanded section and a second opening is provided proximate the second curved expanded section.
  • the peripheral edge includes a first straight section that extends between the first curved expanded section and a curved tip of the proximal tip section.
  • the peripheral edge includes a second straight section that extends between the second curved expanded section and the curved tip of the proximal tip section.
  • the shaft portion includes a distal tip section that is angled relative to a proximal straight section of the shaft portion.
  • the head portion is angled to the left or to the right relative to the proximal straight section of the shaft portion.
  • the head portion includes a cobra head-like appearance.
  • a plurality of undercut portions are formed in the shaft portion and the head portion.
  • Another exemplary proximal femur bone plate designed for veterinary use may include, inter alia, a shaft portion including a distal tip section and a proximal straight section, and a head portion including a distal section and a proximal tip section.
  • the head portion is bounded by a peripheral edge that connects the head portion to a first side and a second side of the proximal straight section.
  • the peripheral edge includes a first curved expanded section that connects the distal section to the first side of the proximal straight section and a second curved expanded section that connects the distal section to the second side of the proximal straight section.
  • the first curved expanded section and the second curved expanded section are configured to accommodate a flared anatomy of a subtrochanteric region of a proximal femur.
  • the distal tip section is angled relative to the proximal straight section of the shaft portion.
  • the head portion is angled to the left or to the right relative to the proximal straight section of the shaft portion.
  • the distal section of the head portion is angled at an inclined angle relative to the proximal straight section of the shaft portion, and the proximal tip section is angled at a declined angle relative to the distal section.
  • the inclined angle and the declined angle are configured to accommodate a curvature of a greater trochanter of the proximal femur.
  • Figure 1 schematically illustrates select portions of a musculoskeletal system 10 of an animal.
  • the musculoskeletal system 10 is that of a canine.
  • teachings of this disclosure may be applicable for other veterinary uses, such as for felines, for example.
  • Hind limbs 12 of the musculoskeletal system 10 are specifically illustrated in Figure 1.
  • Each hind limb 12 includes, among other bones, a femur 14 and a tibia 16 positioned distally of the femur 14.
  • a distal section 18 of the femur 14 interfaces with the tibia 16 to establish a knee joint of the animal.
  • the distal section 18 may be simply referred to as the distal femur.
  • a proximal section 20 of the femur 14 interfaces with an ilium 22 to establish a hip joint of the animal.
  • the proximal section 20 may be simply referred to as the proximal femur.
  • the ilium 22 includes an acetabulum 24 that forms a cup configured to receive a femoral head 26 of the proximal section 20 of the femur 14.
  • the femoral head 26 may articulate relative to the acetabulum 24 as part of a ball-and-socket joint of the hip joint.
  • a fracture 28 can occur in the proximal section 20 of the femur 14, such as in response to a traumatic impact.
  • the fracture 28 may present itself in various forms and could result in one or more bone fragments breaking away from the proximal section 20 of the femur 14. Whatever pattern exhibited by the fracture 28, the fracture 28 typically must be repaired in order to alleviate pain and facilitate proper bone healing.
  • the fracture 28 may be repaired using a bone plate. This disclosure is therefore directed to bone plate designs that are specifically suited for repairing proximal femur fractures of animals (e.g., non-humans such as canines and felines).
  • Figures 2-5 illustrate an exemplary bone plate 30 for repairing a fracture 28 of a proximal section 20 of a femur 14 of an animal, such as a canine or feline, for example.
  • the bone plate 30 is shown alone in Figures 2-4, and the bone plate 30 is shown positioned relative to the proximal section 20 of the femur 14 in Figure 5.
  • the bone plate 30 may extend along a longitudinal axis A between a shaft portion 32, located distally and configured to interface with a diaphysis 36 of the femur 14 when the bone plate 30 is implanted, and a head portion 34, located proximally and configured to interface with a greater trochanter 38 of the proximal femur when the bone plate 30 is implanted (see, e.g., Figure 5).
  • the shaft portion 32 and the head portion 34 establish a single-piece bone plate structure.
  • the bone plate 30 may be specifically sized and shaped for use relative the proximal section 20 of the femur 14 of a canine or a feline, for example.
  • the bone plate 30 may be anatomically contoured to the proximal femur in each of an X-axis, Y-axis, and Z-axis of a cartesian coordinate system 25 for accommodating multiple breed sizes and shapes.
  • the bone plate 30 includes an overall length LI.
  • the overall length LI may be specifically sized for use relative the proximal section 20 of the femur 14 of a canine or a feline, for example.
  • the shaft portion 32 may include a length L2, and the head portion 34 may include a length L3. In an embodiment, the length L2 is larger than the length L3.
  • the shaft portion 32 may be either non-scalloped or scalloped along its length L2.
  • the head portion 34 may be broader than the shaft portion 32.
  • the head portion 34 may include a maximum width W 1 that is larger than a maximum width W2 of the shaft portion 32.
  • the distal tip section 40 may be angled relative to the proximal straight section 42 to establish a slight kickout within the shaft portion 32 for providing a more optimized shape for accommodating the procurvatum contour of the diaphysis 36 of the femur 14.
  • the distal tip section 40 may extend at an angle a relative to the proximal straight section 42. In an embodiment, the angle a is between about 5 degrees and about 10 degrees. In another embodiment, the angle a is about 7 degrees. However, the angle a may be optimized for suitability relative to any type of animal.
  • the term “about” means that the expressed quantities or ranges need not be exact but may be approximated and/or larger or smaller, reflecting acceptable tolerances, conversion factors, measurement error, etc.
  • the head portion 34 of the bone plate 30 may be angled (in the Y-axis direction) relative to the proximal straight section 42 of the shaft portion 32.
  • the head portion 34 may extend at an angle P relative to the proximal straight section 42. In an embodiment, the angle is about 5 degrees. However, the angle P may be optimized for suitability relative to any type of animal.
  • the head portion 34 of the bone plate 30 may include a distal section 48 and a proximal tip section 50.
  • the distal section 48 is located between the proximal straight section 42 and the proximal tip section 50 and thus establishes the interface between the shaft portion 32 and the head portion 34.
  • the longitudinal axis A may bisect the proximal straight section 42 of the shaft portion 32 into two equal sections such that the proximal straight section 42 is substantially symmetrical about the longitudinal axis A.
  • the distal section 48 and the proximal tip section 50 of the head portion 34 may each be asymmetrically disposed about the longitudinal axis A.
  • the distal section 48 of the head portion 34 may extend at an inclined angle y (in the Z-axis direction, see Figure 4) relative to the proximal straight section 42 of the shaft portion 32.
  • the distal section 48 is angled at an inclined angle y of between about 10 degrees and about 20 degrees relative to the proximal straight section 42.
  • the inclined angle y is about 20 degrees.
  • other angles may be suitable within the scope of this disclosure.
  • the proximal tip section 50 may extend at a declined angle 0 relative to the distal section 48 of head portion 34 (in the Z-axis direction, see Figure 4). In an embodiment, the proximal tip section 50 is angled at a declined angle 0 of between about 5 degrees and about 45 degrees relative to the distal section 48. However, other angles may be suitable within the scope of this disclosure.
  • the head portion 34 of the of the bone plate 30 may be bounded by a peripheral edge 52 that extends from a first side 54 of the proximal straight section 42 of the shaft portion 32 to a second side 56 of the proximal straight section 42 that is opposite of the first side 54.
  • the peripheral edge 52 may connect to and extend outwardly of the first side 54 of the proximal straight section 42 to establish a first curved expanded section 58 of the distal section 48 of the head portion 34. From the first curved expanded section 58, the peripheral edge 52 may continue linearly to establish a first straight section 60 of the proximal tip section 50 of the head portion 34.
  • the peripheral edge 52 may extend from the first straight section 60 about a curved tip 62 of the proximal tip section 50 and then linearly along a second straight section 64 that is positioned on an opposite side of the proximal tip section 50 from the first straight section 60.
  • the peripheral edge 52 may additionally connect to and extend outwardly of the second side 56 of the proximal straight section 42 to establish a second curved expanded section 66 of the distal section 48 of the head portion 34.
  • the second curved expanded section 66 may connect to the second straight section 64 of the proximal tip section 50 of the head portion 34.
  • the inclined angle y, the declined angle 0, and the first and second curved expanded sections 58, 66 may cooperate to establish a cobra head-like appearance (e.g., single or dual cobra-head) of the head portion 34 of the bone plate 30.
  • the head portion 34 is therefore configured to be anatomically contoured to the proximal femur.
  • the inclined angle y and the declined angle 0 of the head portion 34 may cooperate to better accommodate the curvature of the greater trochanter 38 of the proximal section 20 of the femur 14, and the first and second curved expanded sections 58, 66 are designed to better accommodate the flared anatomy of a subtrochanteric region 68 (see Figure 5) of the femur 14.
  • the shaft portion 32 of the bone plate 30 may include a plurality of openings 70 each configured for receiving a fixation device 72 (e.g. screws, etc., shown in Figure 5 but not in Figures 2-4) for fixating the bone plate 30 to the diaphysis 36 of the femur 14.
  • the openings 70 extend completely through the shaft portion 32 and therefore open through both the bone contacting surface 44 and the outer surface 46.
  • the proximal straight section 42 of the shaft portion 32 includes seven openings 70 that are equally sized and aligned relative to one another along the longitudinal axis A, and the distal tip section 40 of the shaft portion 32 includes three equally sized openings 70.
  • other configurations are also contemplated, and thus the total number of openings 70 and their specific arrangement within the shaft portion 32 are not intended to limit this disclosure.
  • a first cluster of openings 74 may be formed in the distal section 48 of the head portion 34, and a second cluster of openings 76 may be formed in the proximal tip section 50 of the head portion 34.
  • the openings 74, 76 may each be configured for receiving additional fixation devices 72 (e.g. screws, etc.) for fixating the bone plate 30 to the proximal femur.
  • the openings 74, 76 extend completely through the head portion 34 and therefore open through both the bone contacting surface 44 and the outer surface 46.
  • the distal section 48 includes three openings 74 that are equally sized and positioned in a clustered arrangement for maximizing bone purchase within the proximal femur.
  • One of the openings 74 may be provided proximate to the first curved expanded section 58, another of the openings 74 may be provided proximate to the second curved expanded section 66, and yet another of the openings 74 may be provided distal to the other two openings 74 of the clustered arrangement.
  • other configurations are also contemplated, and thus the total number of openings 74 and their specific arrangement within the distal section 48 are not intended to limit this disclosure.
  • the opening 74 of the distal section 48 that is distal to the two other openings 74 of the distal section 48 may be an angled opening that is designed to maximize bone purchase into a neck portion of the proximal femur.
  • this distally-most located opening 74 is angled at an angle between about 5 degrees and about 15 degrees relative to a transverse axis that is perpendicular to the longitudinal axis A of the bone plate 30.
  • other angles may also be suitable depending on a given breed size and shape.
  • the proximal tip section 50 includes three openings 76 that are equally sized and positioned in a clustered arrangement for maximizing bone purchase within the proximal femur.
  • the total number of openings 76 and their specific arrangement within the proximal tip section 50 are not intended to limit this disclosure.
  • the bone plate 30 may additionally include one or more K-wire holes 78 configured for receiving a K-wire (not shown) in order to temporarily secure the bone plate 30 to the femur 14 prior to achieving final fixation via the fixation devices 72.
  • the K-wire holes 78 extend completely through the bone plate 30 and therefore open through both the bone contacting surface 44 and the outer surface 46.
  • the bone plate 30 includes one K-wire hole 78 formed in shaft portion 32 (e.g., within the distal tip section 40) and one K-wire hole 78 formed in the head portion 34 (e.g., within the proximal tip section 50).
  • the total number and placement of the K-wire holes 78 provided in the bone plate 30 is not intended to limit this disclosure.
  • the bone plate 30 may additionally include one or more suture holes 80 configured for receiving a suture or other threadlike material.
  • suture (not shown) may be passed through various muscles (e.g., vastus lateralis of quadricep) associated with the femur 14 and then passed through the suture holes for securing the muscles during surgical closure.
  • the suture hole 80 is formed through the bone plate 30 at an interface between the distal section 48 and the proximal tip section 50 of the head portion 34.
  • other placement locations could be implemented and therefore are contemplated within the scope of this disclosure.
  • a plurality of undercut portions 82 may be formed in the bone plate 30 (e.g., in both the shaft portion 32 and the head portion 34) on the bone contacting surface 44.
  • the undercut portions 82 are configured to minimize bone contact at certain locations of the bone plate 30, thereby creating a more homogenous cross-sectional area across the bone plate 30 in order to reduce stress concentration at the bone plate openings and improve mechanical properties.
  • the bone plate 30 may be made from any biocompatible material or combination of biocompatible materials. Exemplary materials that may be suitable for manufacturing the bone plate 30 include, but are not limited to, titanium, titanium alloys, stainless steel, thermoplastic materials, etc.
  • the bone plate 30 is shown and described as having a left orientation. However, the bone plate 30 could also be provided in a right orientation, with such a bone plate being the mirror image of the left orientated bone plates described above.
  • Figures 6(a), 6(b), and 6(c) illustrate an exemplary proximal femur bone plate 30-2 having a right orientation.
  • the bone plates of this disclosure provide a more anatomic, easier to use, and more stable bone plate for repairing proximal femur fractures of animals compared to prior plate designs.
  • the proposed bone plates may be utilized for all proximal femur fracture patterns and include various design features for specifically accommodating the contour and native tissue anatomy of the proximal femur.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'invention concerne des lames osseuses à usage vétérinaire. Par exemple, les lames osseuses peuvent être utilisées pour réparer des fractures du fémur proximal chez les canidés ou les félins. Les lames osseuses peuvent comporter diverses caractéristiques permettant de mieux s'adapter à l'anatomie et à la structure du tissu natif du fémur proximal d'un animal, et peuvent être utilisées pour tous les types de fractures du fémur proximal.
PCT/US2024/058603 2023-12-07 2024-12-05 Plaques pour fracture du fémur proximal à usage vétérinaire Pending WO2025122702A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363607283P 2023-12-07 2023-12-07
US63/607,283 2023-12-07

Publications (1)

Publication Number Publication Date
WO2025122702A1 true WO2025122702A1 (fr) 2025-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2024/058603 Pending WO2025122702A1 (fr) 2023-12-07 2024-12-05 Plaques pour fracture du fémur proximal à usage vétérinaire

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WO (1) WO2025122702A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6338734B1 (en) * 2000-03-14 2002-01-15 Biomet, Inc. Method and apparatus for trochanter fixation
US7207993B1 (en) * 2000-02-03 2007-04-24 Pioneer Laboratories, Inc. Apparatus and method for repairing the femur
US8764809B2 (en) * 2006-08-15 2014-07-01 Swissmedtechsolutions Ag Trochanter retention plate
US20180256221A1 (en) * 2017-03-13 2018-09-13 DePuy Synthes Product, Inc. Proximal Femur Hook Plate
US20190380754A1 (en) * 2018-06-15 2019-12-19 Stryker European Operations Holdings, LLC Trochanter Plates

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207993B1 (en) * 2000-02-03 2007-04-24 Pioneer Laboratories, Inc. Apparatus and method for repairing the femur
US6338734B1 (en) * 2000-03-14 2002-01-15 Biomet, Inc. Method and apparatus for trochanter fixation
US8764809B2 (en) * 2006-08-15 2014-07-01 Swissmedtechsolutions Ag Trochanter retention plate
US20180256221A1 (en) * 2017-03-13 2018-09-13 DePuy Synthes Product, Inc. Proximal Femur Hook Plate
US20190380754A1 (en) * 2018-06-15 2019-12-19 Stryker European Operations Holdings, LLC Trochanter Plates

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