41 results about "Cervical fusions" patented technology

A sterile composite bone graft for use in implants comprising a T shaped cortical bone load bearing member mated to a cancellous member. The crosspiece of the T defines an inner planar surface and dove tail shaped mating member extends outward from the inner planar surface. The allograft cancellous bone member defines tapered side walls on the exterior surface of the body, a flat proximal end surface and a flat distal end surface. A dove tail shaped recess with the narrowest portion exiting the flat proximal end surface is cut into the interior of the cancellous member body. The dove tail shaped member and dove tail shaped recess are mated together to hold both component members together. Pins are mounted in both members to provide additional stability.

An improved anterior cervical plating system and methods of cervical fusion using such a system are provided. The cervical plating system includes an interlocking mechanism that integrated into each of the plates such that any two plates may cooperatively engage through the interlocking mechanism such that a new cervical plate can be interconnected with a pre-existing plate during revision surgery without removal of the pre-existing plate.

An osteosynthetic plate assembly and a method of installing the osteosynthetic plate assembly is disclosed. The osteosynthetic plate assembly comprises a dynamic extension plate having a first end portion for connection to a first vertebrae, a second end portion for connection to a second vertebrae, and a dynamic flexible portion extending between the first and second end portions. The dynamic extension plate is configured for coupling with a cervical fusion plate. A method of installing the dynamic extension plate to adjacent vertebrae comprises the steps of engaging a connector of the dynamic extension plate with a coupling of a cervical fusion plate, and mounting the dynamic extension plate to the adjacent vertebrae.

An improved anterior cervical plating system and methods of cervical fusion using such a system are provided. The cervical plating system includes an interlocking mechanism that integrated into each of the plates such that any two plates may cooperatively engage through the interlocking mechanism such that a new cervical plate can be interconnected with a pre-existing plate during revision surgery without removal of the pre-existing plate.

The invention discloses a porous titanium cervical fusion cage with a hydroxyapatite (HA) coating and a preparation method of the fusion cage. The fusion cage is composed of an entity framework structure and a porous structure, wherein the entity framework structure is filled with the porous structure. The front portion of the fusion cage is of a structure similar to a bullet head, all edges of the fusion cage are covered with entity smooth titanium alloy thin wall, and the risk that in the implanting process, fusion cage edge small beams are subjected to stress concentration, and arm breaking is caused can be reduced. The central part of the rear portion of the fusion cage is of an arc-shaped entity titanium alloy structure with the thickness being 3 mm or above, and a threaded hole and a groove are machined in the arc-shaped entity titanium alloy structure in a second stage machining mode and used for making the fusion cage connected to an implanting handle during an operation. A thread and the groove can provide a connection mode which is firmer and more reliable than a clamping mode, and implanting is conducted conveniently during the operation. The surfaces of all the small beams of the porous structure of the fusion cage are covered with the hydroxyapatite (HA) coating with the thickness being about 100-500 micrometers, and a more excellent early osseointegration effect can be provided.

The invention discloses an anterior spinal and cervical 3D print type artificial bone trabecula structure cervical fusion device. The device is characterized by comprising an entity support, the entity support comprises a horizontal plane entity support body (1) and an axial position entity support body (3), and a porous structure (2) is arranged in the middle of the entity support. The porous structure simulating the cancellous bone of the human body is manufactured in the 3D mode, a bone ingrowth support is provided, and the osteogenesis process is promoted; support pillars are additionally arranged on the periphery and on the sides to improve mechanical property, the elasticity modulus of the entity support is made to be close to that of a contact surface, and then shielding is avoided. Implantation of human bone is not needed, bone taking amount in surgery can be further reduced, the number of operative wounds is reduced, and surgery can be finished in a minimally invasive mode.

The invention discloses a cervical fusion apparatus, comprising a lock screw and a fusion apparatus body. The fusion apparatus body is fixed in cervical vertebra through the lock screw and is provided with a plurality of positioning pins and a plurality of limiting pins. The positioning pins can be developed in X-ray and used for controlling an implantation position of the fusion apparatus body. The fusion apparatus body is in a ring structure, a middle through hole of which is a bone grafting hole, and comprises a circular front segment and a fixing segment, the circular front segment comprises an upper surface, a lower surface and a sidewall, the circular front segment is provided with a first positioning hole, the middle of the fixing segment is provided with a threaded hole, and the threaded hole is communicated with the bone grafting hole; the upper and lower sides of the threaded hole are symmetrically provided with mounting holes, a groove is provided in the outside of the threaded hole, and left and right groove sides of the groove are provided with second positioning holes. The cervical fusion apparatus is reasonable in structure, convenient to mount and stable and firm, and the upper and lower surfaces of the apparatus are of rib tooth structures, allowing instant stability after implanting, promoting fusion and keeping well cervical physiological curvature.

The invention relates to a preparation method of an octahedral 3D printed PLGA/hydroxyapatite cervical interbody fusion cage, a product and an application thereof. A solid part takes polylactic acid-polyglycolic acid (PLGA) copolymer as a main component to be a main component of a biological scaffold, and the nano-sized hydroxyapatite particles are used as a filling inorganic material, The biodegradable nano-hydroxyapatite composite fusion cage is prepared by fused deposition 3D printing, the method comprises preparation of a PLGA/hydroxyapatite composite material, preparation of a cage modeland application of 3D plotter bioprinter for fused deposition to prepare cervical fusion cage. The cervical interbody fusion cage of the invention is convenient to implant, accelerates the fusion of the device and the cervical vertebra, and is not easy to slide out of an implantation site and has high biocompatibility, a bone graft aperture is filled with a bone graft, the fusion of tissue and materials can be accelerated, the cavity is filled with new bone cells, and the fusion effect is enhanced.

The invention relates to the field of medical apparatus and instruments for cervical vertebra, in particular to a zero-incisure cervical fusion cage with self-stabilization ridges; the technical problem to be solved by the invention is to provide the zero-incisure cervical fusion cage with the self-stabilization ridges, which not only can be immediately stabilized but also is fixed without screwing a screw or an insertion plate into the tail part of the cervical fusion cage. The zero-incisure cervical fusion cage with the self-stabilization ridges comprises a fusion cage body and a bone grafting straight slot formed in the fusion cage body along the vertical direction; the upper surface and the lower surface of the fusion cage body are respectively and symmetrically provided with the paired self-stabilization ridges; the central axes of the self-stabilization ridges are parallel with each other, and the top face of each self-stabilization ridge is provided with anti-back pawls. The concept of the zero-incisure cervical fusion cage with the self-stabilization ridges, disclosed by the invention, has the skillful points that not only can the transmission of vertebra load be more uniform to avoid local load concentration but also clinical operation is very convenient, and the pain of patients is relieved by creatively utilizing the self-stabilization ridges; the zero-incisure cervical fusion cage has a very promotion prospect, and is especially suitable for anterior decompression and fusion operative treatment on cervical spondylosis.

The invention relates to the technical field of internal fixation apparatuses for upper anterior cervical bone graft fusion, in particular to an internal fixation device for upper anterior cervical fusion. The internal fixation device comprises a body (1), a top wing (2) and a tail wing (3) and is characterized in that the body (1) with the upper portion at one end and the lower portion at the other end is a tubular part with four hollowed-out meshed walls, the cross section of the upper portion of the body (1) is oval while the cross section of the lower portion of the body (1) is circular, horizontal heights of two thin side walls of the upper portion of the body (1) are larger than the horizontal height of the middle portion, the top wing (2) is arranged on one side of the upper portion of the body (1), the tail wing (3) is arranged on one side of the lower portion of the body (1), and each of the top wing (2) and the tail wing (3) is provided with at least two through holes. The internal fixation device for upper anterior cervical fusion is simple in structure and novel in design and aims at the problem of anterior cervical reconstruction after lesionectomy for atlantoaxial ventral lesions or upper cervical ventral lesions with involvement of lower cervical long sections.

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 discloses an anterior cervical fusion device comprising an upper wall, a lower wall and a columnar body connected with the upper wall and the lower wall. A first screw hole is formed in the upper wall, the columnar body is provided with a filler opening which is through in the front-back direction, at least a second screw hole and a third screw hole are formed between the upper wall and the filler opening, and fixing grooves are formed in the two sides of the columnar body. The screw holes are formed in the upper wall of the fusion device, so the fusion device and an implantation device can be well fixed. Besides, the fixing grooves are formed in the two sides of the columnar body of the fusion device respectively and matched with a clamping arm of the implantation device, and accordingly it is further guaranteed that the fusion device is well fixed and prevented from loosening and moving.

The invention discloses an anterior cervical fusion surgery auxiliary bone grafting device, which comprises a bearing plate, an auxiliary processing device, a slide rail seat and a sharpening machine, and is characterized in that the auxiliary processing device is mounted at the right end of the bearing plate, when an ilium is placed in an inner circular groove of a turntable, the ilium is pressed by a top cylinder and then is sharpened by a sharpening head, when the sharpening angle needs to be changed, a motor arranged in a supporting seat works, so that a sliding push block in a supporting mechanism on the back face is pushed out, meanwhile, a rotary disc rotates to change the ilium angle, then the sliding push block supports the back face of the ilium, then coping is conducted, the motor rotates reversely, the sliding push block retreats due to an arranged ratchet mechanism, and an air cylinder retreats after machining is completed; an elastic block in the sliding push block pops up under the acting force of a spring, the ilium falls into the cleaning tank filled with disinfection alcohol under pushing force to be manually cleaned, surface powder impurities fall into the bottom of the cleaning tank during soaking, the temperature facilitates rapid removal, the grinding efficiency is improved, and the auxiliary effect is better.

The invention provides an anterior-posterior combined atlantoaxial fusion device which comprises an occipito-cervical fusion plate, the occipito-cervical fusion plate comprises an occipital bone plate, two connecting plates and a cervical bone plate, the two connecting plates are connected to the two ends of the occipital bone plate respectively, the cervical bone plate is connected to the two connecting plates in a bridging mode, and through holes are formed in the two connecting plates; a bridging plate comprises a plate body and a filling block arranged on the plate body; and a bridging screw penetrates through the through hole and is matched with the filling block so as to connect the occipito-cervical fusion plate and the bridging plate together. According to the technical scheme, theproblem that in the prior art, after the atlantoaxial fusion device is connected with a bone, the stress is uneven, and consequently the atlantoaxial fusion device is prone to losing efficacy is effectively solved.

The present invention discloses a cervical fusion cage. A material of the cervical fusion cage is porous tantalum; s structure of the cervical fusion cage is a box-shaped structure; an upper surface of the cervical fusion cage is convex, and a lower surface is flat; the cervical fusion cage comprises a central part and a peripheral wall, the central part is arranged in middle of the cervical fusion cage, and a periphery of the central part is provided with the peripheral wall; the peripheral wall is manufactured from the porous tantalum with a porosity of 20%-30%; the central part is manufactured from the porous tantalum with a porosity of 70%-80%; and the central part of the cervical fusion cage is provided with a vertical telescopic barb. The provided cervical vertebra fusion does not need bone grafting, is free of a bone grafting region, avoids bone grafting related complications, and is made of the porous tantalum material. The porous tantalum, also known as a bone trabecular metal, has a three-dimensional structure communicating with similar pores of human cancellous bones, is relatively high in porosity, can promote nutrient exchange in the pores, is more conducive to bone ingrowth, promotes bone integration and increases a fusion rate.