IP Library › Granted Patent US 12678292

Granted Patent B2

US 12678292 · App. 18/785,071 · Granted Jul 14, 2026

Intra-vertebral body device for vertebral kyphoplasty with dual expansion (cranio-caudal and medio-lateral) capability

Inventors: Tobias A. Mattei (Eureka, MO); Nicholas Musgrave (St. Louis, MO)

A61F2/4425 A61F2/4601 A61F2002/30471 A61F2002/30518 A61F2002/443 A61F2002/4631

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Quick Facts

Patent No.: US 12678292
App. No.: 18/785,071
Granted: Jul 14, 2026
Kind: B2

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Abstract

An intra-vertebral body mechanical device for cement augmentation of a fractured vertebral body which has a plurality of upper plates and a plurality of lower plates. An expansion mechanism is operably connected between the upper plates and the lower plates. The expansion mechanism is operable to cause the plurality of upper plates to move to side-by-side relative positions increasing their combined surface area and to cause the plurality of lower plates to move to side-by-side relative positions increasing their combined surface area.

Claims (57)

1 . An intra-vertebral body device for restoring a fractured vertebral body comprising:

a base, the base having a longitudinal dimension between a top of the base and a bottom of the base, the top of the base and the bottom of the base being at longitudinally opposite ends of the base, the base longitudinal dimension between the top of the base and the bottom of the base is adjustable;

a plurality of upper plates operatively connected to the top of the base in a compact configuration of the plurality of upper plates, the plurality of upper plates in the compact configuration comprising at least a first upper plate positioned at the top of the base and second and third upper plates positioned in overlapping and stacked positions longitudinally beneath the first upper plate and on laterally opposite sides of the base;

a plurality of lower plates operatively connected to the bottom of the base in a compact configuration of the plurality of lower plates, the plurality of lower plates in the compact configuration comprising at least a first lower plate positioned at the bottom of the base and second and third lower plates positioned in overlapping and stacked positions longitudinally over the first lower plate and on laterally opposite sides of the base;

an expansion mechanism operatively connected to the plurality of upper plates and the plurality of lower plates;

the base, the plurality of upper plates, the plurality of lower plates and the expansion mechanism being configured for surgical positioning inside an interior of a fractured vertebral body between an upper interior surface of the fractured vertebral body and a lower interior surface of the fractured vertebral body, the expansion mechanism being configured to be operable to cause the plurality of upper plates to move from the compact configuration of the plurality of upper plates laterally relative to each other with the second and third upper plates moving laterally away from each other and out from the overlapped and stacked positions beneath the first upper plate, to positions of the second upper plate and the third upper plate on laterally opposite sides of the first upper plate and to move the second upper plate and the third upper plate longitudinally upward from beneath the first upper plate to side-by-side positions of the second upper plate and the third upper plate on laterally opposite sides of the first upper plate and achieve medio-lateral expansion of the plurality of upper plates and an expansion of the combined surface areas of the plurality of upper plates at the top of the base with the combined surface areas of the plurality of upper plates being configured to engage against and push against additional surface areas of the upper interior surface of the fractured vertebral body and the expansion mechanism being operable to cause the plurality of lower plates to move from the compact configuration of the plurality of lower plates laterally relative to each other with the second and third lower plates moving laterally away from each other and out from the overlapped and stacked positions over the first lower plate to positions of the second lower plate and the third lower plate on laterally opposite sides of the first lower plate and to move the second lower plate and the third lower plate longitudinally downward from over the first lower plate to side-by-side positions of the second lower plate and the third lower plate on laterally opposite sides of the first lower plate and achieve medio-lateral expansion of the plurality of lower plates and an expansion of the combined surface areas of the plurality of lower plates at the bottom of the base with the combined surface areas of the plurality of lower plates being configured to engage against and push against additional surface areas of the lower interior surface of the fractured vertebral body in restoring the fractured vertebral body with the intra-vertebral body device.

2 . The device of claim 1 , further comprising:

the expansion mechanism being configured to be operable to cause the plurality of upper plates to move from the overlapped, stacked relative positions of the first, second and third upper plates with the second and third upper plates positioned on laterally opposite sides of the base and the second and third upper plates positioned longitudinally beneath the first upper plate to side-by-side positions of the plurality of upper plates with the second and third upper plates positioned on laterally opposite sides of and laterally aligned with the first upper plate; and

the expansion mechanism being configured to be operable to cause the plurality of lower plates to move from the overlapped, stacked relative positions of the first, second and third lower plates with the second and third lower plates positioned on laterally opposite sides of the base and the second and third lower plates positioned longitudinally over the first lower plate to the side-by-side positions of the plurality of lower plates with the second and third lower plates positioned on laterally opposite sides of and laterally aligned with the first lower plate.

3 . The device of claim 2 , further comprising:

the plurality of upper plates being operatively connected for relative linear sliding movement between adjacent plates of the plurality of upper plates; and

the plurality of lower plates being operatively connected for relative linear sliding movement between adjacent plates of the plurality of lower plates.

4 . The device of claim 3 , further comprising:

5 . The device of claim 3 , further comprising:

the base, the plurality of upper plates, the plurality of lower plates and the expansion mechanism being adapted and configured for surgical insertion into an interior of a fractured vertebral body with the plurality of upper plates opposing an upper interior surface of the fractured vertebral body and the plurality of lower plates opposing a lower interior surface of the fractured vertebral body and then expanded longitudinally and medio-laterally.

6 . The device of claim 1 , further comprising:

the plurality of upper plates is separated from the plurality of lower plates by the expansion mechanism positioned longitudinally between the plurality of upper plates and the plurality of lower plates.

7 . The device of claim 1 , further comprising:

the expansion mechanism being configured to be operable to cause the plurality of upper plates to move relative to each other to side-by-side positions with the plurality of upper plates positioned on opposite sides of the top of the base; and

the expansion mechanism being configured to be operable to cause the plurality of lower plates to move relative to each other to side-by-side positions with the plurality of lower plates positioned on opposite sides of the bottom of the base.

8 . The device of claim 1 , further comprising:

the expansion mechanism being configured to be operable to cause the plurality of upper plates to first move laterally from overlapped relative positions and then move longitudinally to adjacent side-by-side relative positions and to cause the plurality of lower plates to first move laterally from overlapped relative positions and then move longitudinally to adjacent side-by-side relative positions.

9 . A device for intra-vertebral body restoration comprising:

a base, the base having a longitudinal dimension that is dimensioned for insertion between an upper interior surface of a fractured vertebral body and a lower interior surface of a fractured vertebral body, the base having a top of the base and a bottom of the base that are longitudinally spaced;

the base having a lateral dimension, the lateral dimension being mutually perpendicular with the longitudinal dimension;

a plurality of upper plates on the top of the base, the plurality of upper plates being connected to the top of a base in a compact configuration of the plurality of upper plates, the plurality of upper plates in the compact configuration comprising at least a first upper plate positioned at the top of the base and second and third upper plates position in overlapping and stacked positions longitudinally beneath the first upper plate and on laterally opposite sides of the base with the second upper plate positioned entirely below the first upper plate and the third upper plate positioned entirely below the first upper plate in the compact configuration of the plurality of upper plates, the plurality of upper plates on the top of the base being configured to be movable in a lateral direction on the top of the base and the plurality of upper plates on the top of the base being configured to be movable in a longitudinal direction on the top of the base; and

a plurality of lower plates on the bottom of the base, the plurality of lower plates being connected to the bottom of the base in a compact configuration of the plurality of lower plates, the plurality of lower plates in the compact configuration comprising at least a first lower plate positioned at the bottom of the base and second and third lower plates positioned in overlapping and stacked positions longitudinally above the first lower plate and on laterally opposite sides of the base with the second lower plate positioned entirely above the first lower plate and the third lower plate positioned entirely above the first lower plate in the compact configuration of the plurality of lower plates, the plurality of lower plates on the bottom of the base being configured to be movable in the lateral direction on the bottom of the base and the plurality of lower plates on the bottom of the base being configured to be movable in the longitudinal direction on the bottom of the base.

10 . The device of claim 9 , further comprising:

the plurality of upper plates on the top of the base being movable in laterally sliding movements between adjacent upper plates on the top of the base.

11 . The device of claim 10 , further comprising:

the plurality of lower plates on the bottom of the base being movable in laterally sliding movements between adjacent lower plates on the bottom of the base.

12 . The device of claim 11 , further comprising:

tongue and groove connections between adjacent plates of the plurality of upper plates and adjacent plates of the plurality of lower plates.

13 . The device of claim 9 , further comprising:

the plurality of upper plates is separated from the plurality of lower plates by the expansion mechanism positioned vertically between the plurality of upper plates and the plurality of lower plates.

14 . The device of claim 9 , further comprising:

the expansion mechanism being configured to be operable to cause the plurality of upper plates to move relative to each other to side-by-side positions with the second upper plate and third upper plate of the plurality of upper plates positioned on opposite sides of the top of the base;

and

the expansion mechanism being configured to be operable to cause the plurality of lower plates to move relative to each other to side-by-side positions with the second lower plate and third lower plate of the plurality of lower plates positioned on opposite sides of the bottom of the base.

15 . An intra-vertebral body device for restoring a fractured vertebral body comprising:

a base, the base having a longitudinal dimension that is configured for surgical positioning inside an interior of a fractured vertebral body between an upper interior surface and a lower interior surface of the fractured vertebral body, the base having a top of the base and a bottom of the base that are longitudinally spaced;

the base having a lateral dimension, the lateral dimension being mutually perpendicular with the longitudinal dimension;

a plurality of upper plates on the top of the base, the plurality of upper plates on the top of the base being movable laterally on the top of the base, the plurality of upper plates being connected to the top of the base in a compact configuration of the plurality of upper plates, the plurality of upper plates in the compact configuration comprising at least a first upper plate positioned at the top of the base and second and third upper plates positioned in overlapping and stacked positions longitudinally beneath the first upper plate with the second upper plate and the third upper plate positioned within a lateral dimension of the first upper plate and on laterally opposite sides of the base;

a plurality of lower plates on the bottom of the base, the plurality of lower plates on the bottom of the base being movable laterally on the bottom of the base, the plurality of lower plates being connected to the bottom of the base in a compact configuration of the plurality of lower plates, the plurality of lower plates in the compact configuration comprising at least a first lower plate positioned at the bottom of the base and second and third lower plates positioned in overlapping and stacked positions longitudinally over the first lower plate with the second lower plate and the third lower plate positioned within a lateral dimension of the first lower plate and on laterally opposite sides of the base; and

an expansion mechanism inside the base operatively connected to the plurality of upper plates and the plurality of lower plates, the expansion mechanism being configured to be operable to cause the plurality of upper plates to move laterally relative to each other to side-by-side positions and achieve an increased combined surface area of the plurality of upper plates at the top of the base with the combined surface area being configured to oppose additional surface area of the upper interior surface at the top of the fractured vertebral body and to cause the plurality of lower plates to move laterally relative to each other to side-by-side positions and achieve an increased combined surface area of the plurality of lower plates at the bottom of the base with the combined surface area being configured to oppose additional surface area of the lower interior surface at the bottom of the fractured vertebral body in restoring the fractured vertebral body with the intra-vertebral body device.

16 . The device of claim 15 , further comprising:

17 . The device of claim 15 , further comprising:

the expansion mechanism being operable to cause the plurality of upper plates to move from overlapped relative positions with the second and third upper plates positioned underneath the first upper plate to adjacent side-by-side relative positions and to cause the plurality of lower plates to move from overlapped relative positions with the second and third lower plates positioned on top of the first lower plate to adjacent side-by-side relative positions.

18 . The device of claim 15 , further comprising:

the base comprising the expansion mechanism.

19 . The device of claim 15 , further comprising:

the plurality of upper plates is operatively connected to the top of the base on opposite sides of the top of the base by the expansion mechanism incorporated into the base that enables relative movement of adjacent upper plates on the base; and

the plurality of lower plates is operatively connected to the bottom of the base on opposite sides of the bottom of the base by the expansion mechanism incorporated into the base that enables relative movement of adjacent lower plates on the base.

20 . The device of claim 15 , further comprising: