Spinal plate system for stabilizing a portion of a spine

• US 20040092939A1
• Filed: 01/24/2003
• Published: 05/13/2004
• Est. Priority Date: 02/01/2002
• Status: Abandoned Application

• Current Assignee: Zimmer Spine, Inc. (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Zimmer Spine, Inc. (Zimmer Biomet Holdings, Inc.)
• Inventors: Agricola, Jon P., Wagner, Erik J., Freid, James M.
• Application Number:
  US10/351,288
• Publication Number:
  US 20040092939A1
• Time in Patent Office: Days
• US Class Current: 606/79
• CPC Class Codes: A61B 17/1728 for holes for bone plates or plate screws
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/7059 Cortical plates A61B17/7007, A61B17/7058 take precedence
• CPC Class Codes: A61B 17/8009 the plate having a ratchet
• CPC Class Codes: A61B 17/8023 Variable length plates adjustable in both directions
• CPC Class Codes: A61B 17/8047 wherein the additional element surrounds the screw head in the plate hole A61B17/8052 takes precedence
• CPC Class Codes: A61B 17/808 Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
• CPC Class Codes: A61B 17/8085 with pliable or malleable elements or having a mesh-like structure, e.g. small strips A61B17/8071, A61B17/8076 take precedence
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 17/8625 Shanks, i.e. parts contacting bone tissue
• CPC Class Codes: A61B 17/8888 at its central region
• CPC Class Codes: A61B 17/8894 holding the implant into or through which the screw is to be inserted A61B17/7082, A61B17/7091 take precedence
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00858 high friction, non-slip on handles A61B2017/00429
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element
• CPC Class Codes: A61B 90/92 coded with colour
• CPC Class Codes: A61B 90/94 coded with symbols, e.g. text

Abstract

A spinal plate system that maintains intervertebral spacing and spinal stability is provided. In an embodiment, a spinal compression plate may include two or more plates coupled together form an adjustable-length plate. Compression of a spinal compression plate movement may mimic natural settling of bones in a spine and/or distribute at least a portion of a vertebral load to an implant positioned between two vertebrae. Maintaining at least a portion of the vertebral load on an insert may increase bone growth and increase fusion between an implant and surrounding vertebrae.

Claims

1. A spinal plate system for a human spine, comprising:

a first plate configured to be coupled to human bone, wherein the first plate comprises extensions;

a second plate configured to be coupled to human bone, wherein the second plate comprises slots; and

wherein at least one of the extensions on the first plate is configured to couple to at least one of the slots on the second plate to form an adjustable-length spinal plate.

2. The spinal plate system of claim 1, wherein at least one of the extensions on the first plate is configured to mate with at least one of the slots on the second plate.

3. The spinal plate system of claim 1, wherein two extensions on the first plate are configured to be coupled to two slots on the second plate.

4. The spinal plate system of claim 1, wherein two extensions on the first plate are configured to mate with two slots on the second plate.

5. The spinal plate system of claim 1, wherein extensions on the first plate are coupled to slots on the second plate.

6. The spinal plate system of claim 1, wherein the spinal plate system is configured to couple to two human vertebrae.

7. The spinal plate system of claim 1, wherein one extension on the first plate is configured to be coupled to one slot on the second plate.

8. The spinal plate system of claim 1, wherein the spinal plate system is configured to compress along a longitudinal axis such that lordotic alignment is maintained during use.

9. The spinal plate system of claim 1, wherein the spinal plate system is configured to compress to correspond to bone settling during use.

10. The spinal plate system of claim 1, wherein at least one of the slots and at least one of the extensions have mating stepped portions.

11. The spinal plate system of claim 1, further comprising a pin configured to inhibit decoupling of the first plate and the second plate during use.

12. The spinal plate system of claim 1, wherein the first plate is configured to conform to a lordotic curvature of a spine.

13. The spinal plate system of claim 1, wherein the second plate is configured to conform to a lordotic curvature of a spine.

14. The spinal plate system of claim 1, wherein the adjustable-length spinal plate is configured to conform to a curvature of a spine.

15. The spinal plate system of claim 1, wherein the spinal plate system is configured to conform to a radial curvature of a spine.

16. The spinal plate system of claim 1, wherein the spinal plate system is configured to provide structural support for a spinal implant.

17. The spinal plate system of claim 1, further comprising at least one bending region on the adjustable-length spinal plate, wherein the bending region is configured to facilitate bending of the adjustable-length spinal plate.

18. The spinal plate system of claim 1, further comprising at least one groove on the adjustable-length spinal plate, wherein at least one groove is configured to facilitate bending of the adjustable-length spinal plate.

19. The spinal plate system of claim 1, wherein the first plate comprises texturing to inhibit motion of the first plate relative to the second plate.

20. The spinal plate system of claim 1, wherein the second plate comprises texturing to inhibit motion of the second plate relative to the first plate.

21. A spinal plate system for a human spine, comprising:

a first plate configured to be coupled to human bone, wherein the first plate comprises an opening;

a second plate configured to be coupled to human bone, wherein the second plate comprises an opening;

wherein the first plate is configured to be coupled to the second plate to form an adjustable-length spinal plate with at least one opening through the adjustable-length spinal plate; and

a retainer configured to be positioned in at least one opening through the adjustable-length spinal plate.

22. The spinal plate system of claim 21, wherein the first plate is coupled to the second plate.

23. The spinal plate system of claim 21, wherein the retainer is positioned in the opening in the first plate.

24. The spinal plate system of claim 21, wherein the retainer is positioned in the opening in the second plate.

25. The spinal plate system of claim 21, wherein the opening is located at or near a center of the adjustable-length spinal plate.

26. The spinal plate system of claim 21, wherein the first plate comprises at least one extension.

27. The spinal plate system of claim 21, wherein the second plate comprises at least one slot.

28. The spinal plate system of claim 21, wherein the first plate comprises at least one extension and the second plate comprises at least one slot, and wherein at least one extension of the first plate is configured to be coupled to at least one slot of the second plate.

29. The spinal plate system of claim 21, wherein the first plate comprises at least one extension and the second plate comprises at least one slot, and wherein at least one extension of the first plate is configured to be coupled to at least one slot of the second plate

30. The spinal plate system of claim 21, wherein the retainer is substantially ring-shaped.

31. The spinal plate system of claim 21, wherein the retainer is configured to inhibit backout of a fastener when the fastener is positioned in the opening.

32. The spinal plate system of claim 21, wherein the retainer is configured to inhibit backout of a fastener when the fastener is positioned in the opening, and wherein the fastener couples to the spinal plate to bone during use.

33. The spinal plate system of claim 21, further comprising a coupling member, wherein the coupling member is configured to couple the first plate to the second plate such that at least a portion of the first plate overlays at least a portion of the second plate.

34. The spinal plate system of claim 21, wherein the adjustable-length spinal plate is configured to compress to correspond to bone settling during use.

35. The spinal plate system of claim 21, wherein the adjustable-length spinal plate is configured to conform to a curvature of a spine.

36. The spinal plate system of claim 21, wherein the spinal plate system is configured to compress along a longitudinal axis such that lordotic alignment is maintained during use.

37. The spinal plate system of claim 21, wherein the first plate comprises texturing to inhibit motion of the first plate relative to the second plate.

38. The spinal plate system of claim 21, wherein the second plate comprises texturing to inhibit motion of the second plate relative to the first plate.

39. A spinal plate system for a human spine, comprising:

a first plate configured to be coupled to human bone;

a second plate configured to be coupled to human bone;

wherein the first plate is configured to be coupled to the second plate to form an adjustable-length spinal plate;

wherein the adjustable-length spinal plate comprises at least one elongated opening; and

wherein a retainer is configured to be positioned in at least one elongated opening such that the retainer can longitudinally move.

40. The spinal plate system of claim 39, wherein the first plate comprises at least one extension.

41. The spinal plate system of claim 39, wherein the second plate comprises at-least one slot.

42. The spinal plate system of claim 39 wherein the first plate comprises at least one extension and the second plate comprises at least one slot, and wherein at least one extension of the first plate is configured to be coupled to at least one slot of the second plate.

43. The spinal plate system of claim 39, wherein the retainer is substantially ring-shaped.

44. The spinal plate system of claim 39, wherein the retainer comprises projections.

45. The spinal plate system of claim 39, wherein the retainer is configured to inhibit backout of a fastener from the at least one elongated opening.

46. The spinal plate system of claim 39, wherein the retainer is configured to inhibit backout of a fastener from the at least one elongated opening, and wherein the fastener couples the spinal plate to bone during use.

47. The spinal plate system of claim 39, wherein the first plate comprises texturing to inhibit motion of the first plate relative to the second plate.

48. The spinal plate system of claim 39, wherein the second plate comprises texturing to inhibit motion of the second plate relative to the first plate.

49. A spinal plate system for a human spine, comprising:

a first plate configured to be coupled to human bone;

a second plate configured to be coupled to human bone;

wherein the first plate is configured to be coupled to the second plate to form an adjustable-length spinal plate;

wherein the adjustable-length spinal plate comprises at least one elongated opening; and

wherein a retainer is configured to be positioned in at least one of the elongated openings such that the retainer can uni-directionally move during use.

50. The spinal plate system of claim 49, wherein unidirectional movement comprises longitudinal movement.

51. The spinal plate system of claim 49, wherein the retainer comprises serrations.

52. The spinal plate system of claim 49, wherein at least one elongated opening comprises serrations.

53. The spinal plate system of claim 49, wherein the retainer comprises serrations, wherein at least one elongated opening comprises serrations, and wherein serrations of the retainer contact serrations of at least one elongated opening.

54. The spinal plate system of claim 49, wherein the first plate comprises at least one extension.

55. The spinal plate system of claim 49, wherein the second plate comprises at least one slot.

56. The spinal plate system of claim 49 wherein the first plate comprises at least one extension and the second plate comprises at least one slot, and wherein at least one extension of the first plate is configured to be coupled to at least one slot of the second plate.

57. The spinal plate system of claim 49, wherein the retainer is substantially ring-shaped.

58. The spinal plate system of claim 49, wherein the retainer is configured to inhibit backout of a fastener from the elongated opening.

59. The spinal plate system of claim 49, wherein the retainer is configured to inhibit backout of a fastener from the elongated opening, and wherein the fastener couples the plate to the bone during use.

60. The spinal plate system of claim 49, wherein the first plate comprises texturing to inhibit motion of the first plate relative to the second plate.

61. The spinal plate system of claim 49, wherein the second plate comprises texturing to inhibit motion of the second plate relative to the first plate.

62. A spinal plate system for a human spine, comprising:

a first plate configured to be coupled to human bone;

a second plate configured to be coupled to human bone;

wherein the first plate is configured to be coupled to the second plate to form an adjustable-length spinal plate; and

a spacer configured to establish a length of the adjustable-length spinal plate during use.

63. The spinal plate system of claim 62, wherein the first plate is coupled to the second plate.

64. The spinal plate system of claim 62, wherein the spacer is configured to establish a separation distance between the first plate and the second plate during use.

65. The spinal plate system of claim 62, wherein the spacer establishes a separation distance between the first plate and the second plate during use.

66. The spinal plate system of claim 62, wherein the spacer is configured to establish a separation distance of about 4 mm between the first plate and the second plate during use.

67. The spinal plate system of claim 62, wherein the spacer establishes a separation distance of about 4 mm between the first plate and the second plate during use.

68. The spinal plate system of claim 62, wherein the spacer is coupled to the adjustable-length spinal plate before insertion of the adjustable-length spinal plate into a patient.

69. The spinal plate system of claim 62, wherein the spacer is configured to establish a length of an adjustable-length spinal plate to facilitate coupling of the adjustable-length spinal plate to two or more vertebrae.

70. The spinal plate system of claim 62, wherein the spacer is coupled to an opening in the adjustable-length spinal plate during use.

71. The spinal plate system of claim 62, wherein the first plate comprises texturing to inhibit motion of the first plate relative to the second plate.

72. The spinal plate system of claim 62, wherein the second plate comprises texturing to inhibit motion of the second plate relative to the first plate.

73. A spacer for establishing a length of an adjustable-length spinal plate, comprising:

a coupling portion, wherein the coupling portion is configured to couple the spacer to the adjustable-length spinal plate during use; and

a spacing portion, wherein the spacing portion is configured to establish a space between components of the adjustable-length spinal plate during use.

74. The spacer of claim 73, wherein the coupling portion is threaded.

75. The spacer of claim 73, wherein the coupling portion is pointed for insertion into bone.

76. The spacer of claim 73, further comprising a guidepost, wherein an end of the guidepost comprises the coupling portion.

77. The spacer of claim 73, further comprising a guidepost, wherein the guidepost is configured to be coupled to a fastener guide.

78. The spacer of claim 73, wherein the spacing portion establishes a separation of about 4 mm between components of the adjustable-length spinal plate.

79. The spacer of claim 73, further comprising a guidepost, wherein the guidepost is configured to be coupled to a handle.

80. The spacer of claim 73, wherein the spacing portion contacts at least two components of the adjustable-length spinal plate during use.

81. The spacer of claim 73, further comprising an alignment portion, wherein the alignment portion is configured to position the spacer relative to the adjustable-length spinal plate.

82. The spacer of claim 73, wherein the spacer may be used to facilitate positioning of the adjustable-length spinal plate during insertion.

83. A spinal plate system for a human spine, comprising:

two or more plates configured to be coupled to human bone;

wherein the two or more plates are configured to be coupled together to form an adjustable-length spinal plate; and

wherein at least one of the two or more plates comprises one or more bending regions configured to facilitate bending of the adjustable-length spinal plate at one or more bending regions to achieve a desired curvature.

84. The spinal plate system of claim 83, wherein at least one of the one or more bending regions comprises a groove.

85. The spinal plate system of claim 83, wherein one of the two or more plates comprises two bending regions.

86. The spinal plate system of claim 83, wherein two of the two or more plates each comprise two bending regions.

87. The spinal plate system of claim 83, wherein a first plate comprises texturing to inhibit motion of the first plate relative to a second plate.

88. A spinal plate system, comprising:

a first plate configured to be coupled to human bone;

a second plate configured to be coupled to human bone;

wherein the first plate and the second plate are configured to be coupled together to form an adjustable-length spinal plate;

wherein at least a portion of the first plate couples with at least a portion of the second plate to form a coupling interface; and

wherein at least a portion of the coupling interface comprises friction texturing.

89. The spinal plate system of claim 88, wherein at least a portion of the first plate mates with at least a portion of the second plate to form a mating interface.

90. The spinal plate system of claim 88, wherein at least a portion of the first plate mates with at least a portion of the second plate to form a mating interface, and wherein at least a portion of the mating interface comprises friction texturing.

91. The spinal plate system of claim 88, wherein at least a portion of the first plate comprises friction texturing.

92. The spinal plate system of claim 88, wherein at least a portion of the second plate comprises friction texturing.

93. The spinal plate system of claim 88, wherein at least a portion of the first plate and at least a portion of the second plate comprise friction texturing.

94. A spinal plate system for a human spine, comprising:

two or more plates configured to be coupled to human bone;

wherein the first plate and the second plate are configured to be coupled together to form an adjustable-length spinal plate; and

wherein the adjustable-length spinal plate comprises at least one irregularly shaped opening configured to facilitate insertion of a retainer into the opening.

95. The spinal plate system of claim 94, wherein the retainer is substantially ring-shaped.

96. The spinal plate system of claim 94, wherein a first portion of at least one irregularly shaped opening may have a radius of curvature larger than a radius of curvature of a second portion of the opening.

97. The spinal plate system of claim 94, wherein a first plate comprises texturing to inhibit motion of the first plate relative to a second plate.

98. A spinal plate system for a human spine, comprising:

three or more plates configured to be coupled to human bone;

wherein the three or more plates are configured to be coupled together to form an adjustable-length spinal plate; and

wherein the adjustable-length spinal plate is configured to be fastened to at least four adjacent vertebrae.

99. The spinal plate system of claim 98, wherein the spinal plate system is configured to span three vertebral levels.

100. The spinal plate system of claim 98, wherein the spinal plate system is spans three vertebral levels.

101. The spinal plate system of claim 98, wherein the spinal plate system is configured to span four vertebral levels.

102. The spinal plate system of claim 98, wherein the spinal plate system is configured to span four vertebral levels.

103. The spinal plate system of claim 98, adjustable-length spinal plate comprises at least three openings.

104. The spinal plate system of claim 98, wherein a first plate of the three or more plates comprises texturing to inhibit motion of the first plate relative to an adjacent plate of the three or more plates.

105. An adjustable-length spinal plate kit for a human spine, comprising:

an adjustable-length spinal plate comprising at least one opening; and

a spacer configured to establish a length of the adjustable-length spinal plate during use.

106. The kit of claim 105, further comprising a plate insertion instrument for inserting the spinal plate into a patient.

107. The kit of claim 105, further comprising two or more spacers.

108. The kit of claim 105, wherein the spacer is configured to establish a separation between components of the adjustable-length spinal plate during use.

109. The kit of claim 105, wherein the spacer is configured to establish a separation of about 4 mm between components of the adjustable-length spinal plate during use.

110. The kit of claim 105, further comprising a fastener guide to facilitate positioning of a fastener in at least one opening of the spinal plate.

111. An adjustable-length spinal plate kit for a human spine, comprising:

an adjustable-length spinal plate comprising one or more openings; and

a fastener guide with at least one guide member, the fastener guide being configured to guide insertion of fasteners in one or more of the openings during use.

112. The kit of claim 111, wherein the fastener guide comprises at least two guide members.

113. The kit of claim 111, further comprising a plate insertion instrument.

114. The kit of claim 111, further comprising at least one drill configured to be inserted in the fastener guide.

115. The kit of claim 111, further comprising at least one tap configured to be inserted in the fastener guide.

116. An adjustable-length spinal plate kit for a human spine, comprising:

an adjustable-length spinal plate;

a spacer configured to establish a length of the adjustable-length spinal plate during use; and

a positioner configured to position a portion of an adjustable-length spinal plate in a patient.

117. The kit of claim 116, further comprising a plate insertion instrument.

118. The kit of claim 116, wherein the positioner comprises a pointed end for penetration of a bone.

119. The kit of claim 116, further comprising two or more spacers.

120. The kit of claim 116, wherein the spacer is configured to establish a separation between components of the adjustable-length spinal plate during use.

121. The kit of claim 116, wherein the spacer is configured to establish a separation of about 4 mm between components of the adjustable-length spinal plate during use.

122. The kit of claim 116, further comprising a fastener guide to facilitate positioning of a fastener in at least one opening of the spinal plate.

123. A method of stabilizing a portion of a spine, comprising:

establishing a separation distance between a first plate and second plate of an adjustable-length spinal plate with a spacer;

coupling the adjustable-length spinal plate to vertebrae; and

removing the spacer.

124. The method of claim 123, wherein removing the spacer allows the first plate to move relative to the second plate to accommodate reduction of a separation distance between the vertebrae during use.

125. The method of claim 123, wherein coupling the adjustable-length spinal plate to vertebrae comprises attaching a fastener to a fastener insertion tool;

using the insertion tool to position the tool in an opening in a vertebra below an opening through the adjustable-length spinal plate; and

using the insertion tool to thread the fastener into the vertebra to draw the adjustable-length spinal plate against the vertebra.

126. The method of claim 125, wherein a head of the fastener is inserted into a retainer positioned in the opening through the adjustable-length spinal plate.

127. A method of monitoring compression of a first vertebra relative to a second vertebra, comprising:

taking an initial x-ray image of an installed spinal compression plate;

measuring a distance between an end of an opening in a first plate and an end of a member of a second plate from the x-ray image to determine an initial separation distance;

taking a second x-ray image of the installed spinal compression plate at a subsequent time;

measuring a distance between the end of the opening in the first plate and the end of the member of the second plate from the second x-ray image to determine a second separation distance;

calculating an amount of compression of the spinal compression plate using the initial separation distance and the second separation distance.