Medial-plantar plate for medial column arthrodesis

Patent metadata

Field	Value
Publication number	US-2016256204-A1
Application number	US-201414420240-A
Country	US
Kind code	A1
Filing date	Sep 11, 2014
Priority date	Sep 11, 2014
Publication date	Sep 8, 2016
Grant date	—

Abstract

An article comprises a unitary plate configured to conform to a foot of a patient. The plate has a dorsal portion shaped to conform to a dorsal surface of a medial column of the foot and a plantar-medial portion shaped to conform to a medial surface of a first metatarsal of the foot and extend to a plantar surface of the first metatarsal. The plantar-medial portion is integrally attached to the dorsal portion. The plate has a plurality of apertures for receiving screws. The apertures include: a plurality of first apertures through the dorsal portion, adapted to receive a respective one or more first screws to be inserted into a dorsal surface of a talus of the foot, and at least one second aperture adapted to receive a second screw inserted through a plantar end of the plantar-medial portion into a first metatarsal of the foot.

First claim

What is claimed is:

1 . A method comprising:
fastening a unitary plate to a foot of a patient, the unitary plate having a dorsal portion that conforms to a dorsal surface of a medial column of the foot and a plantar-medial portion that conforms to a medial surface of a first metatarsal of the foot and extends to a plantar surface of the first metatarsal, the plantar-medial portion integrally attached to the dorsal portion, the fastening including: inserting one or more screws through the dorsal portion into a talus of the foot, and inserting at least one additional screw through a proximal end of the plantar-medial portion into a first metatarsal of the foot.

2 . The method of claim 1 , further comprising inserting a compression screw through a compression slot in the plantar-medial portion.

3 . The method of claim 2 , wherein the step of inserting the compression screw causes compression of the medial column.

4 . The method of claim 1 , wherein the plantar portion comprises an oblique portion extending in a posterior-medial direction, the oblique portion conforming to the first metatarsal, and the at least one additional screw is a locking screw.

5 . The method of claim 4 , wherein the locking screw is a polyaxial screw.

6 . The method of claim 4 , wherein the locking screw is an osteopenic screw.

7 . The method of claim 1 , wherein the dorsal portion of the plate has a first row of holes and a second row of holes, the first and second rows of holes are configured to receive locking screws, and the second row of holes is longitudinally offset from the first row of holes.

8 . The method of claim 7 , wherein the foot has a navicular and a cuneiform, and the step of inserting the one or more screws includes inserting at least one screw in each of the talus, the navicular, and the cuneiform.

9 . The method of claim 1 , wherein the dorsal portion has a first average normal direction and the plantar-medial portion has a second average normal direction, and an angle between the first average normal direction and the second average normal direction is about 95 degrees.

10 . The method of claim 1 , wherein the unitary plate is fastened to the foot as part of a medial column fusion for treating neuropathic osteoarthropathy.

11 . An article, comprising:
a unitary plate configured to conform to a foot of a patient, the unitary plate having a dorsal portion shaped to conform to a dorsal surface of a medial column of the foot and a plantar-medial portion shaped to conform to a medial surface of a first metatarsal of the foot and extend to a plantar surface of the first metatarsal, the plantar-medial portion integrally attached to the dorsal portion, the unitary plate having a plurality of apertures for receiving screws, the apertures including: a plurality of first apertures through the dorsal portion, including one or more apertures adapted to receive a respective one or more first screws to be inserted into a dorsal surface of a talus of the foot, and at least one second aperture adapted to receive a second screw inserted through a plantar end of the plantar-medial portion into a first metatarsal of the foot.

12 . The article of claim 11 , wherein the plantar portion further includes a compression slot.

13 . The article of claim 12 , wherein the compression slot is proximate an anterior end of the unitary plate distal from the first apertures.

14 . The article of claim 11 , wherein the plantar-medial portion comprises an oblique portion extending in a posterior-medial direction, the oblique portion configured to conform to the first metatarsal of the foot, and the second aperture is located in the oblique portion.

15 . The article of claim 11 , wherein the dorsal portion of the plate has a first row of first apertures and a second row of first apertures, the first and second rows of first apertures are configured to receive locking screws, and the second row of first apertures is longitudinally offset from the first row of first apertures.

16 . The article of claim 15 , wherein the foot has a navicular and a cuneiform, and the first apertures are arranged to permit inserting the first screws through the first apertures into each of the talus, the navicular, and the cuneiform.

17 . The article of claim 11 , wherein the dorsal portion has a first average normal direction and the plantar-medial portion has a second average normal direction, and an angle between the first average normal direction and the second average normal direction is about 95 degrees.

18 . A method comprising:
fastening a unitary plate to a foot of a patient, the unitary plate having a lateral portion that conforms to a lateral surface of a lateral column of the foot and a plantar portion that conforms to a plantar surface of a cuboid bone of the foot and extends at least to a plantar surface of the cuboid bone, the plantar portion integrally attached to the lateral portion, the fastening including: inserting one or more screws through the lateral portion into a calcaneus of the foot, and inserting at least one additional screw through a plantar proximal end of the plantar portion into the cuboid bone of the foot.

19 . The method of claim 18 , further comprising inserting a compression screw through a compression slot in the plantar portion, so as to cause compression of the medial column.

20 . The method of claim 18 , wherein the lateral portion has a first average normal direction and the plantar portion has a second average normal direction, and an angle between the first average normal direction and the second average normal direction is about 95 degrees.

21 . The method of claim 18 , wherein the unitary plate is fastened to the foot as part of a medial column fusion for treating neuropathic osteoarthropathy.

22 . An article, comprising:
a unitary plate configured to conform to a foot of a patient, the unitary plate having a lateral portion shaped to conform to a lateral surface of a lateral column of the foot and a plantar portion shaped to extend to and conform to a plantar surface of a cuboid bone of the foot, the plantar portion integrally attached to the lateral portion, the unitary plate having a plurality of apertures for receiving screws, the apertures including: a plurality of first apertures through the lateral portion, including one or more apertures adapted to receive a respective one or more first screws to be inserted into a lateral surface of a calcaneus of the foot, and at least one second aperture adapted to receive a second screw inserted through the plantar portion into a cuboid bone of the foot.

23 . The article of claim 22 , wherein the plantar portion further includes a compression slot proximate an anterior end of the unitary plate distal from the first apertures.

24 . The article of claim 22 , wherein the plantar-medial portion comprises an oblique portion extending in a plantar-posterior direction, the oblique portion configured to conform to the cuboid bone of the foot, and the second aperture is located in the oblique portion.

25 . The article of claim 22 , wherein the dorsal portion of the plate has a first row of first apertures and a second row of first apertures, the first and second rows of first apertures are configured to receive locking screws, and the second row of first apertures is longitudinally offset from the first row of first apertures.

26 .

Assignees

• Wright Medical Tech Inc

Inventors

• Patel Vinay
• Mccombs-Stearns Mary

Classifications

• A61B17/8052

  immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded · CPC title

• A61B17/8061

  specially adapted for particular bones (A61B17/70 and A61B17/74 take precedence) · CPC title

• A61B17/8014 Primary

  the extension or compression force being caused by interaction of the plate hole and the screws · CPC title

• A61B17/8057

  the interlocking form comprising a thread · CPC title