Single-lock anterior cervical plate
DC CAFCFirst Claim
1. A plate system adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate system comprising:
- a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screws each having a central longitudinal axis and being adapted to engage each of the at least two cervical vertebral bodies, respectively, each of said bone screws having a leading end for insertion into the bone of the cervical vertebral bodies and a trailing end opposite said leading end, said trailing end having a top surface oriented toward said trailing end of said bone screw and a bottom surface opposite said top surface oriented toward said leading end of said bone screw;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only a single one of said bone screws inserted in a single one of said at least two bone screw receiving holes, said locking element adapted to be coupled to said plate prior to the insertion of said bone screw to be locked by said locking element into said one of said bone screw receiving holes, said locking element being moveable from an initial position that permits the insertion of said bone screw into said one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of said top surface of said bone screw inserted in said one of said bone screw receiving holes.
2 Assignments
Litigations
0 Petitions
Reexamination
Accused Products
Abstract
Anatomically contoured anterior cervical plates with bone ingrowth surfaces, providing for intersegmental compressive preloading, and a rigid and locked interface to all of the bone screws, with those engaging the vertebrae deployed in highly convergent pairs. The bone screws have a tapered self-tapping leading end, an increasing root diameter with a generally constant outer diameter with a thread that is narrow and sharp throughout and an enlarged head portion capable of an interference fit to the receiving holes of the plate. Instrumentation consists of plate holders, a compression apparatus and a pilot hole forming device that interlocks with the plate. Methods for spinal compression and bone hole preparation are provided.
496 Citations
123 Claims
-
1. A plate system adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screws each having a central longitudinal axis and being adapted to engage each of the at least two cervical vertebral bodies, respectively, each of said bone screws having a leading end for insertion into the bone of the cervical vertebral bodies and a trailing end opposite said leading end, said trailing end having a top surface oriented toward said trailing end of said bone screw and a bottom surface opposite said top surface oriented toward said leading end of said bone screw;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only a single one of said bone screws inserted in a single one of said at least two bone screw receiving holes, said locking element adapted to be coupled to said plate prior to the insertion of said bone screw to be locked by said locking element into said one of said bone screw receiving holes, said locking element being moveable from an initial position that permits the insertion of said bone screw into said one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of said top surface of said bone screw inserted in said one of said bone screw receiving holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A plate adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate comprising:
-
a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies, each of said bone screw receiving holes being adapted to receive a single bone screw to attach said plate to the cervical spine; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only a single bone screw inserted in one of said at least two bone screw receiving holes, said locking element adapted to be coupled to said plate prior to the insertion of the bone screw to be locked by said locking element into said bone screw receiving hole, said locking element being moveable from an initial position that permits the insertion of said bone screw into said one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of said one of said bone screw receiving holes into which the single bone screw is to be inserted. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 67, 68, 97)
-
-
64. A plate adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate comprising:
-
a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies, each of said bone screw receiving holes being adapted to receive a single bone screw to attach said plate to the cervical spine; and
said plate having at least one non-detachable locking portion, each of said at least one locking portion adapted to lock to said plate only a single bone screw insereted in one of said at least two bone screw receiving holes, said locking portion being moveable from an inital position that permits the insertion of the bone screw to be locked by said locking portion into said one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of said one of said bone screw receiving holes to retain the bone screw to said plate. - View Dependent Claims (65, 66, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86)
-
-
87. A plate system adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screws each having a central longitudinal axis and being adapted to engage each of the at least two cervical vertebral bodies, respectively, each of said bone screws having a leading end for insertion into the bone of the cervical vertebral bodies and a trailing end opposite said leading end, said trailing end having a top surface oriented toward said trailing end of said bone screw and a bottom surface opposite said top surface oriented toward said leading end of said bone screw;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only a single one of said bone screws inserted in a single one of said at least two bone screw receiving holes, said locking element adapted to be coupled to said plate prior to the insertion of said bone screw to be locked by said locking element into said one of said bone screw receiving holes, said locking element being moveable from an initial position that permits the insertion of said bone screw into said one of said bone screw receiving holes to a final position that is adapted to extend over at least a portion of said top surface of said bone screw inserted in said one of said bone screw receiving holes. - View Dependent Claims (88, 89, 90, 91, 92, 93, 94, 95, 96, 98, 99)
-
-
100. A plate system adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface opposite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screws each having a central longitudinal axis and being adapted to engage each of the at least two cervical vertebral bodies, respectively, each of said bone screws having a leading end for insertion into the cervical spine and a trailing end opposite said leading end, at least one of said bone screws including proximate said trailing end a maximum cross section dimension transverse to the central longitudinal axis of said bone screw, said bone screw having a contact surface area having a generally flat portion;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical longitudinal axis and being adapted to receive one of said bone screws to attach said plate to the cervical spine; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only one of said bone screws inserted in one of said bone screw receiving holes, each of said at least one locking element adapted to contact said generally flat portion of said contact surface area of a respective one of said bone screws so as to retain one of said bone screws to said plate. - View Dependent Claims (101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111)
-
-
112. A plate system adapted for use in the anterior human cervical spine for contacting the anterior aspect of at least two cervical vertebral bodies, said plate system comprising:
-
a plate having a longitudinal axis and a length sufficient to span a disc space and overlap portions of at least two adjacent cervical vertebral bodies, a lower surface for placement against the cervical vertebral bodies and an upper surface oppisite said lower surface, said lower surface being concave along a substantial portion of the longitudinal axis of said plate;
at least two bone screws each having a central longitudinal axis and being adapted to engage each of the at least two cervical vertebral bodies, respectively, each of said bone screws having a leading end for insertion into the cervical spine and a trailing end opposite said leading end, said trailing end including a lower surface generally transverse to the central longitudinal axis of said screw;
at least two bone screw receiving holes extending through said plate from said upper surface through said lower surface, at least a first of said bone screw receiving holes associated with a first of the cervical vertebral bodies and at least a second of said bone screw receiving holes associated with a second of the cervical vertebral bodies, each of said bone screw receiving holes has a seat, said seat having a surface being at least in part flat and adapted to contact said lower surface of one of said bone screws; and
at least one locking element, each of said at least one locking element adapted to lock to said plate only one of said bone screws inserted in one of said at least two bone screw receiving holes, each of said at least one locking element contacting at least a portion of a respective one of said bone screws so as to retain one of said bone screws to said plate. - View Dependent Claims (113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123)
-
Specification