Abstract:
A bioimplant is configured with at least two load-bearing surfaces (12, 14) each having a plurality of protrusions (16, 18) oriented at an angle with respect to one another to resist translation in all directions when opposing load bearing surfaces are under normally applied compressive loads.
Abstract:
A composite bone graft (1) for implantation in a patient, to methods of making, and using the composite bone graft along with methods for treating patients by implanting the composite bone graft at a site in a patient. The composite bone graft includes two or more connected, discrete, bone portions (2-4), and includes one or more bio-compatible connectors (7) which hold together the discrete bone portions (2-4) to form the composite bone graft (1). The composite bone graft (1) may include one or more textured bone surfaces (14b). The textured surface (14a, 14b) preferably includes a plurality of closely spaced protrusions, preferably closely spaced continuous protrusions. The composite bone graft (1) is useful for repairing bone defects caused by congenital anomaly, disease, or trauma in a patient, for example, for restoring vertical support of the anterior, and/or posterior column. Implantation of the composite bone graft results in improved graft stability, and osteo-induction ability, without a decrease in mechanical strength.
Abstract:
An orthopedic implant (300). The implant includes a metal portion (200) having an internal three-dimensional cavity (202), the cavity having an opening (206) to an outer surface (305) of the metal portion, a ledge (204) circumferentially surrounding at least a portion of the opening, and a porous metal insert (100) formed in a three-dimensional shape conforming to the shape of the cavity and enclosed by the cavity without being bonded to the cavity. The insert is retained inside the cavity by the ledge.
Abstract:
A replacement joint for a human body and a method of installing such a replacement joint is provided. A ball portion of the replacement joint is installed on an end of a first bone. A receptacle having an engagement surface that has an aspherical configuration is formed in a second bone. A socket portion of the replacement joint is inserted in the receptacle so as to receive the ball portion on the first bone. The socket portion has an engagement surface with an aspherical configuration complementary to the engagement surface of the receptacle in the second bone. The configurations of the engagement surfaces of the socket portion and the receptacle in the second bone are such that inserting the socket portion in the receptacle in the second bone provides the socket portion with at least four degrees of constraint.
Abstract:
A composition for spinal disc repair comprising a plurality of uniformly shaped demineralized cancellous bone pieces ranging in size from about 2.0mm to about 4.0mm loaded into a porous mesh container with the cancellous bone pieces being treated so that they are not osteoinductive and are packed in the porous mesh container under compression forces.
Abstract:
The present invention is directed to a biostructure comprising an osteoconductive member and an osteoinductive material. The osteoinductive material may be located within a cavity in the osteoconductive material. In one aspect of the invention the osteoinductive material is demineralized bone matrix and the osteoconductive member comprises tricalcium phosphate.
Abstract:
A method of designing an interbody fusion cage is disclosed. The method uses topology optimization algorithms to define the structural layout and the inner microstructures of the cage. After the structural layout is defined, a density distribution process is performed. Based on the density distribution, the inner microstructures of the cage are defined.
Abstract:
A method of providing a soft-tissue transplant to a receiving bone includes providing a transplant graft, comprising an elongated soft tissue, having first and second soft tissue ends longitudinally separated by a soft tissue body, and a bone block directly connected with the first soft tissue end. The bone block and soft tissue have been integrally formed as a unitary whole. An anchor cavity is machined in the receiving bone. The anchor cavity is shaped to substantially accept the bone block in a mating relationship. A majority of a volume of the bone block is placed in the anchor cavity. The bone block is fastened within the anchor cavity.
Abstract:
Method and apparatus are disclosed for distracting tissue and particularly spinal tissue. The device and method may include insertion of at least one elongated member and an augmenting member to form a structure between the tissues to be distraction, such that a dimensional aspect of the structure is augmented upon movement of the augmenting structure.
Abstract:
Spinal tissue distraction devices (136) that include an elongated member which has a pre- deployed configuration for insertion between tissue layers and a deployed configuration in which the elongated member, by change of configuration, forms a helical or spiral support structure (141) for separating and supporting layers of spinal tissue. The distraction devices may also limit and direct the movement of flowable material to substantially reduce extravasation.