摘要:
An intervertebral implant and associated method. The intervertebral implant can include a first component having a first articulating surface and a first bone engagement surface for engaging a first vertebra, and a second component having a second articulating surface and a second bone engagement surface for engaging a second vertebra adjacent to the first vertebra. The first and second articulating surfaces articulate with each other for substantially replicating a natural spinal movement. The first and second bone engagement surfaces define an outer surface substantially shaped as an envelope of five cylinders.
摘要:
The present teachings provide an implant. The implant can include an implant body partially defining at least one threaded aperture. The implant can also include a bone fastener including a threaded portion threadably engaged with the at least one threaded aperture. The threaded aperture can circumferentially surround no more than 180° of the bone fastener.
摘要:
An expandable spinal implant device for supporting vertebral bodies can include first and second body members and first and second expansion mechanisms. The body members can each have a first end positionable toward one of the vertebral bodies and can each define a hollow interior. The expansion mechanisms can be spaced apart from each other and can include a first drive shaft and a second drive shaft, respectively. The first and second drive shafts can each have a gear member fixedly coupled thereto. Each drive shaft can be threadably engaged at a first side to the first body member and at a second side to the second body member. The expansion mechanisms can be operable to effect axial displacement of the first body member relative to the second body member by rotationally driving the gear members of the first and second drive shafts.
摘要:
A dual reconstructive wire system for use with an anatomy can include a first guide wire, a second guide wire, a first guide instrument, a first cannulated insertion instrument, and a second cannulated insertion instrument. The first guide wire can pass through the first cannulated insertion instrument such that a first end and a second end of the first guide wire extends beyond the first end and the second end, respectively of the first cannulated insertion instrument. The second guide wire can pass through the second cannulation insertion instrument such that a first end and a second end of the second guide wire extends beyond the first end and the second end, respectively of the second cannulated insertion instrument.
摘要:
Implantable pliable bone blocks comprising a solid block of cortical bone characterized by a length, width and thickness, having a first and a second face on opposite sides of the block. The first and second faces have a plurality slot features. The angle of incidence of the slot features of the first face and the x-axis and the angle of incidence of the slot features of the second face and the x-axis (a2) are such that the slots would intersect if they were in the same plane. Methods are provided for making implantable pliable bone blocks.
摘要:
A device is disclosed for insertion in the human or animal body in order to increase the spacing between adjacent spinous processes of the spinal column. The device comprises a plurality of shaped members which are pivotally joined to each other and arranged around a central screwed rod which is supported by a collar at one end and a threaded collar at the opposite end said collar and collar being located within the pivoting axis of the adjacent members forming each end of the device. Following insertion in the body and positioning between adjacent spinous processes the device may be deployed by rotation of the central screwed rod in order to achieve the desired separation of adjacent spinous processes while at the same time providing a secure location of the device in the deployed condition.
摘要:
Methods and devices for treatment of osteonecrosis of the femoral head with core decompression include a dowel adapted for placement into a core decompression channel of a femoral head. A cathode at the distal end of the dowel provides electrical stimulation of bone growth in the femoral head. A method of treating osteonecrosis of the femoral head involves placing a dowel having a cathode thereon into a core decompression channel of a femoral head in a state of osteonecrosis. Electrical current is supplied to the cathode for electrical stimulation of bone growth in the femoral head.
摘要:
Methods of modifying stem cells and compositions of modified stem cells, in particular mesenchymal stem cells, using electric or electromagnetic fields. In various embodiments, the present invention's methods are for the treatment of a human or other mammal subject in need thereof, comprising providing an in vitro culture comprising mesenchymal stem cells, administering an electric stimulation to the in vitro culture, and implanting the mesenchymal stem cells into the subject. Methods also include treatment of a human or other mammal subject, comprising implanting mesenchymal stem cells into the subject, and administering an electric stimulation to the mesenchymal stem cells in situ. Other embodiments include methods of administering electric stimulation in conjunction with growth factors to stem cells.
摘要:
A rod coercer for use in spinal fixation procedures is provided. The rod coercer can be pivoted in a first direction to fixedly grip an implant, and pivoted in a second direction to reduce a rod into the implant. In one embodiment, the rod coercer includes first and second articulating handle branches, first and second rod contacting arms extending from the first and second handle branches, first and second implant gripping arms pivotally interconnected with the first and second handle branches, and means for releasably locking the handle branches and the implant gripping arms in a closed and locked position. In another embodiment, the rod coercer includes a single handle having first and second implant gripping arms connected by a bridge and pivotally attached to the handle, and spring-loaded implant gripping arms for gripping sides of an implant. In another embodiment, the rod coercer includes an adjustable rod contacting arm which can be adjusted to a desired angle with respect to the handles of the coercer. In another embodiment, the rod coercer includes pivotally interconnected handle branches, each of which is divided into upper and lower branch portions which are pivotally interconnected with each other, an implant gripping assembly extending from the lower branch portions of the handle branches, and a rod contacting arm slidably and pivotally coupled to the upper and lower branch portions. In another embodiment, the implant gripping arms of the rod coercer of the present invention are secured to each other by a flexible retainer.
摘要:
A percutaneous tower for the orthopedic procedures. The tower can include an outer elongated member, an inner elongated member received within the outer elongated member, a release actuator operable to move the inner elongated member relative to the outer elongated member between first and second positions, and a fastener engagement member coupled to a distal portion of the tower and operable to engage a bone fastener when the inner elongated member is in the first position, and to disengage the bone fastener when the inner elongated member is in the second position.