摘要:
An intervertebral prosthetic device and method for spinal stabilization, according to which a prosthetic device is implanted relative to two vertebrae and is positioned so that it makes a rigid connection with one of the vertebra and a non-rigid connection with the other vertebra.
摘要:
Intervertebral implant components having compliant coatings, and methods of making and implanting the implant components are provided. The embodiments relate to compositions, methods and devices having a compliant surface coating that permits application of the device in areas without significant bone reformation to accept the device.
摘要:
One embodiment of the present application includes a spinal disk prosthesis with one end portion to form a load transmitting relationship with one vertebra of a patient's spine and another end portion to form a load transmitting relationship with another vertebra of the patient's spine. A tube connects the end portions together and a damping material is positioned inside the tube. The end portions each include a magnet to generate a corresponding magnetic field. These magnetic fields are oriented to provide a repulsive force between the end portions to provide a magnetic bearing.
摘要:
At least a portion of an articulating surface of a facet arthroplasty device may comprise a polycrystalline diamond compact. The polycrystalline diamond compact may be useful to increase the wearability and decrease the coefficient of friction of the at least one articulating surface of the facet arthroplasty device. The polycrystalline diamond compact may be utilized with any facet arthroplasty device and may be formed by any appropriate method including, but not limited to, diamond sintering, chemical vapor deposition, physical vapor deposition, and energy beam ablation/deposition.
摘要:
The forces exerted on a spinal implant by one or more coupling assemblies are controlled to facilitate the use of the implant in spinal stabilization and other procedures. The coupling assemblies are structured to limit the forces exerted on the implant to avoid undesirable alteration of a characteristic of the implant while engaging the implant to the coupling assembly and providing at least one of a rigid, semi-rigid or variable engagement of the coupling assembly with one or more anatomical structures of the spinal column.
摘要:
This invention relates to orthopedic tethers and their use to treat orthopedic defects. The tethers of the present invention include a central or inner load bearing fiber or cable surrounded by one or more protective sheaths. Additionally the tethers of the present invention provide enhanced imaging characteristics and can include one or more a radiopaque elements that can readily observed under common diagnostic imaging techniques.
摘要:
Embodiments include a method for promoting selective tissue attachment to medical implants. By treating implant surfaces where tissue attachment is desired with tissue attachment promoting treatments, and treating implant surfaces where tissue attachment is not desired with tissue attachment inhibiting treatments, selective tissue attachment to medical implants may be achieved. Also, embodiments include an implant with at least one tissue contacting surface and at least one secondary surface where tissue attachment is not desired, and appropriate tissue attachment promoting or inhibiting treatments on the surfaces.
摘要:
A method of making a component of a spinal fixation system. The method may comprise providing a mixture of a powder of at least one metal or metal alloy and a polymeric binder. A metal-injection-molding process may use the mixture to form a component for a spinal fixation system. The components may have varying flexibility across their cross-sections. Also, components are provided that are produced by this process, such as spinal fixation rods and plates.
摘要:
Elongated connecting elements include bodies having anisotropic cross-sectional shapes defining a first moment of inertia about a first bending axis and a second moment of inertia about a second bending axis that is transverse to the first bending axis. The connecting elements are positioned along one or more spinal motion segments and engaged to vertebrae with anchors with the first and second bending axes in the desired orientation relative to the spinal motion segments.
摘要:
A surgical instrument for assessing tissue characteristics such as tissue density and volume is disclosed. The surgical instrument is hand-held and includes transducers adapted for emitting and/or receiving acoustic signals. The surgical instrument utilizes pulse-echo to determine tissue characteristics. The surgical instrument may be utilized to determine such things as the size of a lesion and whether the lesion has been completely removed or filled with graft material.