40results about How to "Promote bone fusion" patented technology

A pair of flat support plates in a spinal fusion implant device contact and rest against the softer, central cancellous bone portion of respective endplates of adjacent vertebrae. Each support plate has a front template that is orthogonal to the plate and is bent to communicate with the anterior surface of the hard cortical endplate the vertebrae. A wedge-shaped support strut in a central channel between the two plates is configured to vary the distance between the support plates such that the height of the device proximate the anterior end is greater than the height of the device at the posterior end to maintain the natural lordosis of the spine. Channels formed on either side of the support strut are filled with bone graft material and contact the endplates of the vertebrae through large openings in the flat support plates to facilitate fusion.

This invention relates to a spinal implant for promoting fusion of adjacent vertebrae and restoration of normal disc height. The spinal implant includes an upper and lower surface adapted to engage cancellous bone tissue in the vertebral bodies. The spinal implant also includes at least two opposing bearing surfaces adapted to bear against cortical bone tissue in the endplates of adjacent vertebrae. This invention also provides an instrumentation to prepare the intervertebral space to receive the spinal implant and techniques for treating patents in need of corrective spinal surgery.

A multi-density polymeric interbody spacer formed from biocompatible material for osteoconductivity includes multiple density regions of different porosity to provide both strength and osteoconductivity. An interface region is formed between the density regions to provide both direct adhesion and mechanical interlocking between the different density regions to increase the strength of the multi-density polymeric interbody spacer. A method for forming the multi-density polymeric interbody spacer includes curing a first density region to achieve a first target porosity. A second density region may then be molded to the first density region to achieve a second target porosity. A portion of the second density region partially flows into pores of the first density region, providing direct adhesion and mechanical interlocking between the first and second density regions.

An improved technique for spinal fusion including administration of an HMG-CoA reductase inhibitor to the fusion site. The HMG-CoA reductase inhibitor is preferably delivered to the site by a carrier. More preferably, the HMG-CoA reductase inhibitor is delivered to the site by a noncompressible delivery vehicle. The invention is suitable for promoting non-anatomic or heterotopic bone growth between any bony surfaces where bone growth is desired but does not naturally occur.

A carpal fusion plate for use in fusion of the bones of the midcarpus or other bones. The fusion plate is concave and defines at least one round countersunk screw hole and at least one tapered elongate slotted aperture. The tapered elongate slotted aperture is narrower peripherally and broader centrally. The fusion plate also defines a multilobated central opening.

A hollow non-load-bearing spinal implant having a hollow body and an attachment device for attaching the implant. A method of inserting a non-load-bearing spinal implant by inserting the laminoplasty implant into a prepared space in a spine, positioning the implant within the prepared space and affixing the implant to the spine.

The invention discloses a suspended customized assembly total sacrum prosthesis and a customization method. The suspended customized assembly total sacrum prosthesis comprises a prosthesis body, a right ilium wing fastener and a left ilium wing fastener. The suspended customized assembly total sacrum prosthesis has the advantages that the suspended customized assembly total sacrum prosthesis can rapidly promote bone cell generation and bone fusion, restore sacrum functions and achieves reconstructed waist sacroiliac joint stability.

The interverterbral fusion implement for cervical vertebra anterior operation is one hollow column with polygonal or circular cross section, holes on side wall and sharp teeth on the upper and the lower surfaces. It is made of polymer material capable of being absorbed by human body, poly(DL-lactic acid), poly(L-lactic acid), polyglycolic acid or their copolymer. It has determined early-stage locking effect, late-stage bone fusion effect, good biocompatibility and proper mechanical structure, and may be self-degraded after being fused with vertebra. It results in no rejection and may be also used in thoracic vertebra and lumbar vertebra operation.

The invention discloses an anterior cervical interbody fusion cage which comprises a main body and a development needle arranged on the main body, wherein the main body is a hollow tetrahedron; the cross section of the hollow periphery of the tetrahedron is ladder-shaped; the cross section of the hollow inner circumference of the tetrahedron is square or rectangular; the main body comprises a front wall, a rear wall, a left side wall and a right side wall; and the front wall is connected with the rear wall through the left side wall and the right side wall. The shape of the main body confirms to the anatomic form of the cervical intervertebral disc of a normal human body; while the safe implantation is ensured, the main body can be in tight contact with end plates of an upper cervical vertebral body and a lower cervical vertebral body under the compression state to create a good condition for bone fusion; and the cross section of the hollow inner circumference of the main body is square or rectangular, so that the contact surface of the main body and the end plates of the cervical vertebral bodies is increased to the greatest extent, the bone implementation amount is increased, and the fusion is speeded up.

The invention discloses a pore structure part of a porous titanium intervertebral fusion cage. The pore structure part is a part of a fusion cage printing forming titanium alloy material integrally through a 3D printer, and is used for leading new bone ingrowth. The pore structure part is composed of pore units of a regular tetrahedron structure; respective one ends of four titanium columns of each pore unit are connected together, the inclined angle between each titanium column and another is 109 degree 28 cent, meanwhile the other end of each titanium column is connected to the other end of one titanium column of a corresponding adjacent pore unit, and the inclined angle between the titanium columns is 109 degree 28 cent as well, that is the connection method of each titanium column of the pore structure part and the adjacent titanium column is arranged according to a method similar to the arrangement method of the chemical bond between each carbon atom and an adjacent carbon atom in diamond. The provided pore structure part of a porous titanium intervertebral fusion cage is good in intensity, and has certain elasticity and a certain intervertebral healing effect when in use.

The invention relates to a novel degradable bone implantation material and a preparation method thereof. The bone implantation material is prepared by mixing and pressurizing powder and liquid and then performing solidification, wherein the powder is prepared from 32-70% by weight of phosphate, 28-65% by weight of metal oxide and 1-15% by weight of a silicon-containing compound, and the liquid-solid ratio of the liquid and the powder is 0.1-0.5 ml/g. The preparation method comprises the following steps that firstly, the powder and the liquid are mixed and stirred according to the ratio of 0.1-0.5 ml/g to obtain paste; secondly, the paste is injected into a mould, the pressure is kept to be greater than or equal to 5 atm; thirdly, after the paste solidifies and is released from the mould, the bone implantation material is obtained; finally, the bone implantation material is put in a constant-temperature constant-humidity cabinet with the temperature of 37 DEG C and the humidity of 50-100% for 24 hours or more. The bone implantation material has the advantages of being high in strength, degradable, absorbable, controllable in degradation rate, high in bony fusion rate and the like.

The invention discloses a portion of a porous titanium interbody fusion cage, namely a supporting structure portion of the porous titanium interbody fusion cage. The supporting structure portion is used for bearing external load; and a pore structure portion is used for guiding in-growth of new bone. The upper side, the lower side, the front side, the rear side and the right side of the supporting structure portion are exposed outwards in an open mode, and the front side, the rear side and the right side are provided with open spaces in the form of triangular prisms. When the supporting structure portion is applied to the porous titanium interbody fusion cage, the pore structure portion, which is matched with the supporting structure portion, is exposed outwards in an open mode at the upper side, the lower side, the front side, the rear side and the right side of the cage, so that open growth spaces are provided for the effective growth of bone substances and the like. The supporting structure portion of the porous titanium interbody fusion cage provided by the invention can independently perform functions thereof; and in addition, the supporting structure portion, which is matched with the pore structure portion, can achieve an effect of conducting intervertebral treatment.

The invention discloses an intervertebral fusion machine with bone ingrowth millipores for cervical vertebra. The fusion machine comprises a machine body of which the cross section is in a sector shape, wherein the machine body is defined in the mode that a front machine wall, a left machine wall, a back machine wall and a right machine wall are connected in sequence and is of a tetrahedron structure; a circle of a trapezoid groove with a wide upper portion and a narrow lower portion is formed in the upper end surface of the machine body, a plurality of vertically arranged bone ingrowth millipores are formed in the groove bottom of the groove, and threaded holes are formed in the middle of the back machine wall; developing needles are arranged on the junction portion of the left machine wall and the back machine wall and the junction portion of the back machine wall and the right machine wall and arranged in the machine wall of the center line of the front machine wall. According to the intervertebral fusion machine, a polyetheretherketone material is used, a bone grafting window and the developing needles are designed, the millipores for bone ingrowth are added, and the developingneedles are used for displaying the implantation position of the fusion machine under the X-ray; artificial bones of which the diameters are identical to the diameters of the millipores are implantedinto the bone ingrowth millipores for inducing bone ingrowth, bone fusion on a supporting surface can be improved, the area of intervertebral fusion is effectively increased, and the stability effectof the vertebral body of intervertebral fusion after the operation is improved.

The invention belongs to the technical field of medical prosthesis manufacturing, and relates to a lower cervical vertebra anatomical titanium cage which comprises a titanium cage body; the upper endof the titanium cage body is of a dome structure, the lower end of the titanium cage body is of an inclined structure, a net structure is arranged between the dome structure and the inclined structure, and the net structure is connected with the dome structure and the inclined structure; the net structure comprises a first front surface, a first rear surface, a first left side face and a first right side face which are connected, the first front surface and the first rear surface are each of an arc-shaped structure, and the first left side face and the first right side face are each of a planestructure. The upper end of the lower cervical vertebra anatomical titanium cage is designed to be of the dome structure according to cervical vertebra anatomical data measurement results. The lowerend of the lower cervical vertebra anatomical titanium cage is designed to be of the inclined structure, the angle of a cervical vertebra operation segment is simulated, and therefore the contact areabetween the titanium cage and a cervical vertebra end plate is enlarged, the stress concentration phenomenon is reduced, stress is evenly distributed on the surface of the end plate, and the occurrence rate of collapse of the titanium cage is reduced.

The invention provides a slidable and self-locking atlantoaxial interbody fusion cage. The slidable and self-locking atlantoaxial interbody fusion cage comprises an upper sliding piece component, a lower sliding piece component and a wedge-shaped supporting block for supporting the upper sliding piece component and the lower sliding piece component, wherein the upper sliding piece component and the lower sliding piece component are connected in a sliding manner; and the wedge-shaped supporting block is arranged between the upper sliding piece component and the lower sliding piece component. According to the atlantoaxial interbody fusion cage, the defects of a traditional atlantoaxial interbody fusion cage are overcome, and an surgical approach and clinical operation are fully taken into consideration; and the fusion cage is composed of two prosthesis bodies capable of sliding relatively and the wedge-shaped supporting block is arranged, so the fusion cage can conveniently support the atlantoaxial joint, and locking can be conducted so as to ensure the stability of the atlantoaxial joint.

The invention discloses a tapping type zero-incisure cervical fusion cage which comprises a supporter part and a fixing screw. The whole supporter part is of a circular-truncated-cone-shaped structure. A tapping type thread is formed in the side face wall of the supporter part. The supporter part is provided with a bone grafting groove and the fixing screw. The tapping type zero-incisure cervicalfusion cage has a good self-stabilizing structure, the auxiliary fixing of an anterior titanium plate is avoided, the influences on cervical soft tissue are low, and the tapping type zero-incisure cervical fusion cage has the advantages of being easy to assemble, convenient to implant, capable of forming a small wound, low in postoperative complication occurrence rate and the like.

The invention provides a 3D printing tantalum rod. The tantalum rod includes a threaded part and a multi-level hole part, wherein the threaded part and the multi-level hole part are provided with a through hole penetrating up and down, and the surfaces of the threaded part and the multi-level hole part are both provided with circular holes. The tantalum rod can promote bone conduction and bone fusion, the pore structure can be adjusted, and the mechanical properties such as elastic modulus can be adjusted and are closer to the performance of human bones without stress shielding problems. The tantalum rod is provided with the through hole, so that accurate positioning during operation is facilitated; through the through hole, a related substance is conveniently taken out and injected to achieve the effect of continuous decompression; and the threaded part of the tantalum rod has a 5 degree self-locking anti-rotation thread structure, so that previous unsatisfactory bone growth due to fretting and surgical revision are avoided.