Trial augment and set of trial augments for bone implant

Abstract

To provide a trial augment (100, 600) and a set of trial augments for a bone implant.SOLUTION: The trial augment 100 is configured to augment a bone implant in a first direction 101, in particular in a proximal or distal direction. The trial augment includes: a first connection element 104 capable of connecting the trial augment 100 to a device, in particular the bone implant or another trial augment; and a second connection element 106 capable of connecting to another trial augment to further augment the bone implant in the first direction 101.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a trial augmentation for a bone implant and a trial augmentation set.

Background Art

[0002] A trial augmentation is used to determine the size of the augmentation necessary to increase (reinforce) a bone implant according to the size of the bone defect of a patient receiving the bone implant.

Summary of the Invention

[0003] In the present invention, a trial augmentation for a bone implant is configured to increase (reinforce) the bone implant in a first direction (particularly, the proximal direction or the distal direction), and includes a first connection element configured to be connectable to a device (particularly, the bone implant) or another trial augmentation, and a second connection element configured to be connectable to another trial augmentation so as to further increase (reinforce) the bone implant in the first direction. The trial augmentations are stackable. Thereby, various thicknesses of the augmentation of the bone implant can be tried by using a trial augmentation alone or by using a stack of a plurality of trial augmentations.

[0004] The trial augmentation includes a main body for increasing (reinforcing) the bone implant, the first connection element protrudes and is provided on the distal surface of the main body, and the second connection element is recessed and provided on the proximal surface of the main body, or the first connection element is recessed and provided on the distal surface of the main body, and the second connection element protrudes and is provided on the proximal surface of the main body. Such a configuration of the connection element enables the protruding connection element in one trial augmentation to be accommodated within the main body of another trial augmentation.

[0005] Preferably, the first connecting element extends in a second direction (in particular, a direction from the rear to the front of the trial augument or a direction substantially from the rear to the front), and the second connecting element extends in the second direction or a third direction. When both connecting elements are configured to extend in the second direction, the first connecting element and the second connecting element are configured such that the direction in which the protruding connecting element of the trial augument is slid into the recessed connecting element of another trial augument and the direction in which the recessed connecting element of the trial augument is slid above the protruding connecting element of another trial augument are the same direction. When the second direction and the third direction are used, different sliding directions are provided on both sides of the trial augument.

[0006] According to one example, the first connecting element includes a first member that forms a linear (in particular, a dovetail type) sliding fit portion, and the first member has a cross-section that can be meshed and engaged with a second member provided to form the sliding fit portion in the device or the other trial augument. Thereby, the first member of the trial augument can be slid with respect to the second member of another trial augument so as to provide the stacked state. This trial augument can be stacked on one surface with respect to another trial augument having a corresponding second member.

[0007] Preferably, the first member is configured to be slidable in the sliding fit portion. Thereby, the connection of the trial augument guided by the linear sliding fit portion is enabled.

[0008] According to one example, the trial augment comprises a spring assembly (in particular, a spring sleeve), the first member comprises a wall surface portion having an opening for the spring assembly, the spring assembly is disposed within the opening, the spring assembly is provided to protrude from the first member, and the spring assembly is provided to be pushable into the opening so as to be flush or substantially flush with the wall surface portion. The spring assembly is configured to be pushed into the opening when the second member and the first member engage. The spring assembly is configured to penetrate into a housing of the second member configured to receive a part of the spring assembly. Thereby, when the spring assembly penetrates into the housing, the trial augment is prevented from moving in a direction from rear to front.

[0009] Preferably, the spring assembly is configured to protrude from the first member at an angle with respect to the wall surface portion. The angle is 90°, 45°, or an angle between 90° and 45°.

[0010] According to one example, the second connecting element comprises a second member forming a linear (in particular, a double-tail type) slide fitting portion, the second member is configured to be lockable to a first member forming the slide fitting portion in the other trial augment, and the second member is configured to be slidable in the slide fitting portion. Thereby, a plurality of trial augments can be connected to each other while being guided.

[0011] Preferably, the second member comprises a housing configured to be able to receive (accommodate) a portion protruding from the first member of the spring assembly in the other trial augment (in particular, a part of the sleeve of the spring sleeve).

[0012] According to one example, the second member has a cross-section (in particular, the cross-section of a groove with an undercut shape or the cross-section of a dovetail groove (rabbet groove)) that can mesh and engage with a first member provided to form the slide fitting portion in the other trial augument. Thereby, it becomes possible to provide (form) a stacked state by sliding the second member of the trial augument with respect to the first member of the other trial augument. On the other hand, this trial augument can be stacked with another trial augument having a corresponding first member. A trial augument having a first member and a second member each having a cross-section can be stacked with another trial augument having a corresponding first member and second member on both of its surfaces.

[0013] The trial augument set (a set of trial auguments) of the present invention includes at least two of the above-described trial auguments.

[0014] The trial augument set preferably includes at least two of the trial auguments in which the ranges in which the main bodies extend in the first direction are different from each other. Thereby, the space required for the tray is reduced. In particular, the maximum thickness of a conventional trial augument set is rarely used only in the case of a revision involving a significant bone defect. As a result, the maximum trial augument that is rarely used is avoided in the tray, so that the amount of trial auguments in the tray is reduced.

Brief Description of the Drawings

[0015] Further embodiments can be obtained from the following description and drawings.

[0016]

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MODE FOR CARRYING OUT THE INVENTION

[0017] The trial augment is provided as an instrument for increasing (enhancing) a bone implant to a required range. The trial augments described in this specification are stackable with each other. Thereby, a surgeon can obtain a thicker trial augment by combining two or more trial augments. As a result, the space for the instruments in the tray is reduced.

[0018] The bone implant may be a tibial implant or a femoral implant. The trial augment may be configured to increase (enhance) a tibial implant or a femoral implant.

[0019] In this embodiment, two trial augments are connected to each other by a linear (particularly, dovetail type) slide fitting portion. When the two trial augments are connected to each other, they need to be stable so as to avoid undesirable separation. According to an example, while the first trial augment is being connected to the second trial augment, a spring assembly of the first trial augment projects into a housing provided in a groove of the linear slide fitting portion of the second trial augment.

[0020] FIG. 1 schematically shows a perspective view of a trial augment 100 in a first embodiment. The trial augment 100 in the first embodiment is configured to increase (enhance) a tibial implant in the distal direction 101.

[0021] The trial augment 100 according to the first embodiment includes a main body 102. The main body 102 is configured to expand a tibial implant in the distal direction 101. The trial augment 100 according to the first embodiment includes a first connection element 104 configured to connect the trial augment 100 to a device.

[0022] The device may be a tibial implant or another trial augment 100 according to the first embodiment.

[0023] The trial augment 100 according to the first embodiment optionally includes a second connection element 106. The second connection element 106 is configured to connect to another trial augment 100 according to the first embodiment to further increase (enhance) a tibial implant in the distal direction 101.

[0024] The first connecting element 104 of the trial augument 100 according to the first embodiment protrudes from the main body 102. However, the first connecting element 104 may be a groove in the main body 102. The second connecting element 106 of the trial augument 100 according to the first embodiment is a groove in the main body 102. However, the second connecting element 106 may protrude from the main body 102. The first connecting element 104 is disposed on the distal surface of the main body 102 of the trial augument 100 according to the first embodiment. The second connecting element 106 is disposed on the proximal surface of the main body 102 of the trial augument 100 according to the first embodiment.

[0025] The first connecting element 104 and the second connecting element 106 extend along, or substantially along, the direction 103 from the rear to the front of the trial augument 100.

[0026] The first connecting element 104 includes a first member 108 that constitutes a linear (particularly, double-tail type) slide fitting portion (linear guide).

[0027] The first member 108 according to the trial augument 100 of the first embodiment is configured to be slidable in the linear slide fitting portion. Preferably, the first member 108 according to the trial augument 100 of the first embodiment is configured to be slidable in the second direction (front-rear direction 103).

[0028] The first member 108 according to the trial augument 100 of the first embodiment may be configured to be slidable in the direction 103 substantially from the rear to the front and / or substantially from the front to the rear in the trial augument 100 according to the first embodiment.

[0029] The first member 108 of the trial augument 100 according to the first embodiment has a cross-section for meshing and engaging with a second member that constitutes the linear slide fitting portion. The second member is provided on the device or another trial augument 100 according to the first embodiment.

[0030] The second connecting element 106 includes a second member 110 that constitutes a linear (particularly, dovetail type) slide fitting portion (linear guide). The second member 110 is configured to connect to another trial augument 100 according to the first embodiment.

[0031] The second member 110 of the trial augument 100 according to the first embodiment is configured to be lockable (engageable) with the first member 108 that constitutes the linear slide fitting portion of the another trial augument 100.

[0032] The second member 110 of the trial augument 100 according to the first embodiment is configured to be slidable in the linear slide fitting portion. The second member 110 may be configured to be slidable in the second direction (direction 103 from the rear to the front) or the third direction in the trial augument 100 according to the first embodiment.

[0033] The second member 110 of the trial augument 100 according to the first embodiment may be configured to be slidable in the direction 103 substantially from the rear to the front and / or in the direction substantially from the front to the rear in the trial augument 100 according to the first embodiment.

[0034] The second member 110 may have a cross-section for meshing and engaging with the first member 108 provided so as to constitute the linear slide fitting portion in the another trial augument 100.

[0035] The cross-section may be that of an undercut-shaped groove or that of a double-tail groove (ant groove).

[0036] The trial augument 100 according to the first embodiment includes a spring assembly 112. The spring assembly 112 will be described with reference to FIGS. 2 and 3.

[0037] FIG. 2 schematically shows a bottom view of the trial augument 100 according to the first embodiment. FIG. 3 schematically shows an enlarged view of a portion “A” in the bottom view of the trial augument 100 according to the first embodiment.

[0038] The first member 108 of the trial augument 100 according to the first embodiment includes an opening 114 for the spring assembly 112. The opening 114 may be provided in the wall surface portion of the first member 108.

[0039] The spring assembly 112 is disposed within the opening 114. The spring assembly 112 is provided so as to protrude from the first member 108. The spring assembly 112 may be configured to protrude from the first member 108 at an angle (obliquely) with respect to the wall surface portion. The angle may be, for example, 90°, 45°, or between 90° and 45°.

[0040] The spring assembly 112 is provided so as to be pushed into the opening 114. The spring assembly 112 is provided so as to be pushable into the opening 114 so as to be flush or substantially flush with the wall surface portion, for example.

[0041] The second member 110 may include a housing configured to accommodate a part of the spring assembly 112 (particularly, a part of the sleeve of the spring sleeve) protruding from the first member of another trial augument 100.

[0042] FIG. 4 schematically shows a perspective view of a trial augument set including two trial auguments 100 according to the first embodiment before being assembled in a stacked state.

[0043] The first connection element 104 in one trial augument 100 according to the first embodiment and the second connection element 106 in the other trial augument 100 according to the first embodiment are aligned with each other along the direction 103 from the rear to the front. The two exemplary trial auguments 100 according to the first embodiment have main bodies 102 that extend in a first direction (distal direction 101) and have different ranges (heights or thicknesses) from each other. However, the stack of trial auguments may be composed of trial auguments having the same height as each other in the first direction (distal direction 101).

[0044] FIG. 5 schematically shows the stacked state of two trial auguments 100 according to the first embodiment, that is, after being assembled into the stacked state.

[0045] Note that the stack may be composed of two or more trial auguments 100 according to the first embodiment.

[0046] The main bodies 102 of different trial auguments 100 according to the first embodiment may have different shapes and / or ranges (dimensions) in the second direction (direction 103 from the rear to the front) or the third direction from each other.

[0047] FIG. 6 schematically shows a perspective view of a trial augument 600 in the second embodiment. The trial augument 600 according to the second embodiment is configured to increase (strengthen) the femoral implant in the proximal direction 601.

[0048] The trial augument 600 according to the second embodiment includes a main body 602. The main body 602 is configured to extend the femoral implant in the proximal direction 601.

[0049] The trial augument 600 according to the second embodiment includes a first connection element 604 configured to connect the trial augument 600 to a device.

[0050] The device may be a femoral implant or another trial augument 600 according to the second embodiment.

[0051] The trial augument 600 according to the second embodiment optionally includes a second connection element 606. The second connection element 606 is configured to connect to another trial augument 600 according to the second embodiment to further increase (enhance) the femoral implant in the proximal direction 601.

[0052] The first connection element 604 of the trial augument 600 according to the second embodiment protrudes from the main body 602. However, the first connection element 604 may be a groove in the main body 602. The second connection element 606 of the trial augument 600 according to the second embodiment is a groove in the main body 602. However, the second connection element 606 may protrude from the main body 602. The first connection element 604 is disposed on the proximal side surface of the main body 602 of the trial augument 600 according to the second embodiment. The second connection element 606 is disposed on the distal side surface of the main body 602 of the trial augument 600 according to the second embodiment.

[0053] The first connection element 604 and the second connection element 606 extend along or substantially along the direction 603 from the rear to the front of the trial augument 600.

[0054] The first connection element 604 includes a first member 608 that constitutes a linear (particularly, double-tail type) slide fitting portion.

[0055] The first member 608 of the trial augument 600 according to the second embodiment is configured to be slidable in a linear slide fitting portion. Preferably, the first member 608 of the trial augument 600 according to the second embodiment is configured to be slidable in a second direction (direction 603 from rear to front).

[0056] The first member 608 of the trial augument 600 according to the second embodiment may be configured to be slidable in a direction 603 substantially from rear to front and / or in a direction substantially from front to rear in the trial augument 600 according to the second embodiment.

[0057] The first member 608 of the trial augument 600 according to the second embodiment has a cross section for meshing and engaging with a second member that constitutes the linear slide fitting portion. The second member is provided on the device or another trial augument 600 according to the second embodiment.

[0058] The second connecting element 606 includes a second member 610 that constitutes a linear (particularly, double-tail type) slide fitting portion (linear guide). The second member 610 is configured to connect to another trial augument 600 according to the second embodiment.

[0059] The second member 610 of the trial augument 600 according to the second embodiment is configured to be lockable (engageable) with the first member 608 that constitutes the linear slide fitting portion of the another trial augument 600.

[0060] The second member 610 of the trial augument 600 according to the second embodiment is configured to be slidable in a linear slide fitting portion. The second member 610 may be configured to be slidable in the second direction (direction 603 from the rear to the front) in the trial augument 600 according to the second embodiment, or in the third direction.

[0061] The second member 610 of the trial augument 600 according to the second embodiment may be configured to be slidable in the direction 603 substantially from the rear to the front in the trial augument 600 according to the second embodiment, and / or in the direction substantially from the front to the rear.

[0062] The second member 610 may have a cross section for meshing and engaging with the first member 608 provided so as to form the linear slide fitting portion in the other trial augument 600.

[0063] The cross section may be a cross section of an undercut-shaped groove or a cross section of a dovetail groove.

[0064] The trial augument 600 according to the second embodiment includes a spring assembly 612. The spring assembly 612 will be described with reference to FIGS. 7 and 8.

[0065] FIG. 7 schematically shows a bottom view of the trial augument 600 according to the second embodiment. FIG. 8 schematically shows an enlarged view of part "A" in the bottom view of the trial augument 600 according to the second embodiment.

[0066] The first member 608 of the trial augument 600 according to the second embodiment includes an opening 614 for the spring assembly 612. The opening 614 may be provided in the wall surface portion of the first member 608.

[0067] The spring assembly 612 is disposed within the opening 614. The spring assembly 612 is provided so as to protrude from the first member 608. The spring assembly 612 may be configured to protrude from the first member 608 at an angle (obliquely) with respect to the wall surface portion. The angle may be, for example, 90°, 45°, or an angle between 90° and 45°.

[0068] The spring assembly 612 is provided so as to be pushed into the opening 614. The spring assembly 612 is provided so as to be pushable into the opening 614 such that, for example, it is flush or substantially flush with the wall surface portion.

[0069] The second member 610 may include a housing configured to accommodate a part of the spring assembly 612 (in particular, a part of the sleeve of the spring sleeve) that protrudes from the first member of another trial augument 600.

[0070] FIG. 9 schematically shows a perspective view of a trial augument set including two trial auguments 600 according to a second embodiment before being assembled in a stacked state.

[0071] The first connection element 604 in one trial augument 600 according to the second embodiment and the second connection element 606 in the other trial augument 600 according to the second embodiment are aligned with each other along the direction 603 from the rear to the front. The two exemplary trial auguments 600 according to the second embodiment have main bodies 602 that extend in a first direction (proximal direction 601) and have different ranges (heights or thicknesses) from each other. However, the stack of trial auguments may be composed of trial auguments having the same height as each other in the first direction (proximal direction 601).

[0072] FIG. 10 schematically shows the stacked state of two trial auguments 600 according to the second embodiment, that is, after the assembly into the stacked state.

[0073] Note that the stacking may be composed of two or more trial augmentations 600 according to the second embodiment.

[0074] The main bodies 602 of different trial augmentations 600 according to the second embodiment may have different shapes and / or ranges (dimensions) in the second direction (direction 603 from the rear to the front) or the third direction.

Claims

1. A trial augment (100, 600) for a bone implant, comprising: the trial augment (100, 600) is configured to augment the bone implant in a first direction (101, 601), in particular in a proximal or distal direction; a first connecting element (104, 604) configured to be able to connect the trial augment (100, 600) to a device such as the bone implant or to another trial augment; a second connection element (106, 606) configured to be connectable to another trial augment to further augment the bone implant in the first direction. A trial augment characterized by:

2. a body (102, 602) for augmenting said bone implant; The first connecting element (104, 604) is provided protruding from a distal surface of the body (102, 602) and the second connecting element (106, 606) is provided recessed from a proximal surface of the body (102, 602); or The first connection element (104, 604) is recessed on a distal surface of the main body (102, 602), and the second connection element (106, 606) is protruding on a proximal surface of the main body (102, 602). The trial augment according to claim 1 .

3. the first connecting element (104, 604) extends in a second direction (103, 603), in particular a posterior-to-anterior direction or a substantially posterior-to-anterior direction of the trial augment (100, 600); the second connecting element (106, 606) extends in the second direction (103, 603) or in a third direction; The trial augment according to claim 1 or 2.

4. The first connecting element (104, 604) comprises a first member (108, 608) constituting a linear sliding engagement, in particular a dovetail type, The first member (108, 608) has a cross section that can be matingly engaged with a second member (110, 610) that is provided to form the sliding fitting portion of the device or the other trial augment. The trial augment according to any one of claims 1 to 3.

5. The first member (108, 608) is configured to be slidable in the slide fitting portion. The trial augment according to claim 4 .

6. A spring assembly (112, 612), in particular a spring sleeve, the first member (108, 608) includes a wall portion having an opening (114, 614) for the spring assembly (112, 612); The spring assembly (112, 612) is disposed within the opening (114, 614); The spring assembly (112, 612) is provided to protrude from the first member (108, 608), The spring assembly (112, 612) is configured to be pushably disposed within the opening (114, 614) so ​​as to be flush or substantially flush with the wall portion. The trial augment according to claim 4 or claim 5.

7. the spring assembly (112, 612) is configured to protrude from the first member (108, 608) at an angle relative to the wall portion; The angle is 90°, 45°, or an angle between 90° and 45°. The trial augment according to claim 6 .

8. The second connecting element (106, 606) comprises a second member (110, 610) constituting a linear sliding engagement, in particular a dovetail type, The second member (110, 610) is configured to be lockable to a first member (108, 608) that constitutes the slide fitting portion in the other trial augment, The second member (110, 610) is configured to be slidable in the slide fitting portion. A trial augment according to any one of claims 1 to 7.

9. The second member (110, 610) has a cross section, in particular an undercut groove cross section or a dovetail groove cross section, that can be engaged with the first member (108, 608) that is provided to constitute the sliding fitting portion in the other trial augment. The trial augment according to claim 8 .

10. The second member (110, 610) has a housing configured to receive a portion of the other trial augment protruding from the first member, such as a portion of a sleeve of a spring assembly (112, 612), in particular a spring sleeve. The trial augment according to claim 8 or claim 9.

11. At least two trial augments (100, 600) according to any one of claims 1 to 10, A trial augmentation set characterized by:

12. At least two of the trial augments (100, 600) have different extension ranges of the body (102, 602) in the first direction (101, 601), The trial augment set according to claim 11.

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