65 results about "Joint fusion" patented technology

A bone screw implant comprising a bone screw and a sleeve rotatably coupled with the bone screw. The bone screw includes a shank having a first end and a second end, the shank defining a longitudinal axis extending between the first end to the second end, the first end having a first engagement geometry extending about the shank and the second end having a tip. The bone screw includes an external threading extending along the shank and at least one cutting flute configured to gather and retain bone shavings. The sleeve includes a body portion having an external surface and a bore forming an internal surface, the internal surface having a second engagement geometry extending about the bore, where the first engagement geometry and the second engagement geometry allow the sleeve to rotate freely relative to the bone screw.

An implantable device for sacroiliac (“SI”) joint fusion and an associated method employ an SI joint fusion portion and an anchor portion of smaller diameter than the SI joint fusion portion and that extends distally from a distal end of the SI joint fusion portion. The SI joint fusion portion is externally threaded and is configured to, when surgically implanted, extend across the SI joint. The anchor portion in turn extends distally from the SI joint fusion portion and is configured for implanting entirely within the patient's ilium adjacent the SI joint. In certain configurations, the joint fusion portion is configured to enable fixation of spinal equipment at a proximal end of the joint fusion portion. A stabilizing driver is additionally provided to aid in placement of the device when obstructions are present.

The invention belongs to the technical field of medical equipment, and discloses an atlantoaxial lateral mass joint fusion cage which comprises a fusion cage shell, a supporting block is slidably connected to the inner wall of the fusion cage shell, a rotating rod is rotatably connected to the inner wall of the supporting block, and a threaded rod is fixedly connected to the outer wall of the rotating rod. A positioning bolt is in threaded connection with the outer wall of the fusion cage shell, a supporting mechanism is arranged on the outer wall of the supporting block and comprises a sliding block, a supporting rod is hinged to the inner wall of the sliding block, and a fixing plate is fixedly connected to the outer wall of the fusion cage shell. Through cooperation of the fusion cage shell, the supporting block and other structures, the right side of the fusion cage shell can be kept in a closed state before the fusion cage shell is installed, the size is small, the fusion cage is conveniently inserted between atlantoaxial lateral mass joints to be installed, the overall structure is simple, adaptability is high, use is convenient, and the fusion cage is suitable for popularization and application. And therefore, the process of mounting the fusion cage shell by medical staff is facilitated.

The present invention relates generally to implants and tools for the fixation or fusion of joints or bone segments. These tools include tissue dilators and protectors. Other tools include broaches used to shape bores in bone. The tools can also include a system for removing an implant from bone. Implants can include assemblies of one or more implant structures that make possible the achievement of diverse interventions involving the fusion and / or stabilization of lumbar and sacral vertebra in a non-invasive manner, with minimal incision, and without the necessitating the removing the intervertebral disc. Implants for fusing both sacroiliac joints of a patient include a long implant that extends across both sacroiliac joints.

A sacroiliac (SI) joint implant assembly addresses SI joint dysfunction and degenerative sacroiliitis. The assembly includes a first implant body, a second implant body, and a piezoelectric layer positioned between them. The piezoelectric layer generates electrical charges when subjected to mechanical stress, stimulating bone growth and enhancing stability of the SI joint after surgery. The implant bodies may feature non-planar surfaces to distribute compressive and shear forces unevenly across the piezoelectric layer. The assembly can be secured using fasteners such as screws, pins, or brackets, and may include porous or fenestrated bodies made from materials like titanium or polymers. Some implant assemblies are designed for minimally invasive surgical procedures, with configurations that allow for precise placement using guide wires and imaging techniques. The assembly aims to stabilize the SI joint and promote bone fusion, leveraging the piezoelectric effect to improve the overall efficacy of the fusion procedure.

Implant systems and methods treatment of a joint include a distal portion, a middle portion, and a proximal portion. The distal portion may include a thread having a first thread minor, a first thread major, and a first pitch. The distal portion also may have a reverse cut, helical fenestration formed through the thread. The middle portion may be devoid of threads and may include a porous outer surface structure to promote bony integration, the porous outer surface structure having a leading end and a trailing end, with the leading end having a diameter larger than the first thread minor. The proximal portion may include a proximal thread having a second thread minor, a second thread major, and a second pitch. The second thread minor may be substantially the same width as the trailing end of the middle portion.

The invention discloses a lindera glauca extract, a preparation method thereof and application of the lindera glauca extract in preparation of drugs for preventing and / or treating rheumatoid arthritis. The research finds that the lindera glauca extract can obviously reverse arthritic rat plantar part swelling and toe bending, relieve ankle joint injury, relieve synovial hyperplasia and inflammatory cell infiltration, inhibit joint fusion, relieve joint gap stenosis, relieve articular surface fusion tendency, increase bone mineral density and bone trabecula number, reduce bone trabecula separation degree and improve joint fusion. The lindera glauca extract can be used for relieving rheumatoid arthritis by protecting the inherent structure of joint tissues and improving inflammation, so that a novel natural medicine choice is provided for preventing and / or treating rheumatoid arthritis.

A system for metatarsal phalangeal joint fusion includes a hinged guide; a trajectory guide attachable to the hinged guide; and an anchoring wire to attach the hinged guide to a bone.

A sacroiliac fusion implant device assembly has an implant body with a sliding block and a pair of movable bone spikes. The distal end has a tapered end with an opening configured to receive a guide pin during insertion into a joint between a sacrum and an ilium, and the proximal end has a cannulated threaded post configured to receive a guide pin and to move a sliding block. The sliding block is movable from a retracted unlocked position and to a deployed locked position when moved toward the distal end as the threaded post is rotated clockwise. The bone spikes are movable from a retracted position in the implant body to an exposed deployed locked position by moving the sliding block which presses the spikes up and out of the retracted position extending the bone spikes into bone in the sacroiliac joint.

Devices, systems and methods for surgical treatment of mid-foot disorders such as osteoarthritis, spacing disorders, or alignment disorders, including mid-foot arthroplasty devices and systems for the 2nd and 3rd tarsometatarsal (TMT) joint, implants for post-osteotomy spacing and+ realignment, arthroplasty articular implants, dowel grafts for TMT arthrodesis or fusion, dowel grafts for navicular cuneiform (NC) arthrodesis, dowel grafts for intercuneiform arthrodesis, and / or locking dowels for joint fusion.

An implant for fusing a joint between first and second bone portions. The implant includes a screw member, and a washer polyaxially rotatable relative to the screw member. The screw member includes a head, a lag zone, and a threaded engagement zone. The implant includes a fusion zone for joint compression, extending from the washer to the proximal end of the engagement zone. Fenestrations may be present in the fusion zone. The length of the fusion zone ranges from about 10 mm to about 37 mm. Different surface finishes including roughened and non-roughened may be applied selectively to selected portions of the implant. In an embodiment, the joint is a sacro-iliac joint, and upon implantation the implant extends from the exterior of the ilium, across the joint and into the sacral vertebral body. Instrumentation and methods for preparing the joint and implanting the implant are disclosed.

A drilling guide includes: a handle; and a base connected to the handle, the base further comprising: a body; a lip on an outer surface of the body, the lip configured to interface with an upper surface of a bone plate; a guide hole extending through the body from a first surface of the body to a second surface of the body; and a relief surface extending between the first surface of the base and the second surface of the body.

Systems, methods, and devices for sacroiliac (SI) joint fusion are described. At least one posterior SI implant and at least one lateral SI implant may be implanted. The posterior SI implant may be placed in the intra-articular region, and the lateral SI implant may transfix the SI joint such that the lateral SI implant passes through the ilium, across the SI joint, and into the sacrum. The lateral SI implant may compress the SI joint. The lateral SI implant may be inserted through a window in the posterior SI implant to interlock the two implants.

1. The name of this design product: Atlantoaxial lateral mass arthrodesis cage. 2. Purpose of this product design: This product design is used for atlantoaxial lateral joint lesions. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture. 5. When the back is not in use, the rear view is omitted; when the bottom is not in use, the top view is omitted.

A surgical fixation assembly and related method of fusing a sacroiliac joint are described herein. The surgical fixation assembly includes a compression member, a stabilizer, and a locking element. The compression member is rotatably implantable into two bone segments separated by a joint. The stabilizer is configured for coupling with the compression member in situ after implantation of the compression member and prevents rotation of the compression member after implantation. The locking element is provided on the stabilizer and is moveable from a first position that allows coupling of the stabilizer and compression member to a second position that prevents uncoupling of the stabilizer from the compression member.

1. A drill guide comprising: a handle; a base connected to the handle, the base further comprising: a body; a lip on an outer surface of the body, the lip configured to mate with an upper surface of a bone plate; a guide hole extending through the body from a first surface of the body to a second surface of the body; and a flank extending between the first surface of the base and the second surface of the body.

A surgical guidance device for a subtalar joint fusion of a subject's foot includes a support member. The support member has a support body and a support tip connected to an end of the support body. The support tip is configured for selective engagement with at least a portion of the subtalar joint. A calibration member is selectively adjustably mounted to the support body. A guide member is selectively adjustably mounted to the calibration member. The guide member has opposing first and second guide ends and a guide body extending between the first and second guide ends. The guide body is configured to selectively receive a portion of the subject's foot between the first and second guide ends. At least one of the first and second guide ends defines a guide passage configured to selectively receive a guide pin at least partially therethrough.

Orthopedic rasps and associated techniques can be used for preparing an intercuneiform joint for fusion. In some examples, the orthopedic rasp includes a body having a length extending from a first end to a second end and defining a first widthwise surface and a second widthwise surface opposite the first widthwise surface. The rasp may include a rasp head having a plurality of cutting teeth extending outwardly from one or both of the first widthwise surface and the second widthwise surface of the body. The plurality of cutting teeth may be spaced apart from each other along the width and / or length of the body. The rasp head can be configured to be inserted into an intercuneiform joint space between a first cuneiform and a second cuneiform.

The utility model relates to the field of medical instruments, in particular to an orthopedic nail supporting device which comprises two fixed sleeve connectors capable of being fixedly connected to bone nails in a sleeved mode and a distraction clamp controlling the distraction state of the two fixed sleeve connectors. The distraction clamp comprises two arm rods hinged in a clamp shape, one end, away from the hinged end, of each arm rod is provided with a fixing sleeve connector, an arc-shaped plate is fixed to one arm rod, an arc-shaped hole is formed in the arc-shaped plate, the circle center of the arc-shaped hole coincides with the hinged center of the two arm rods, a nut is arranged on the other arm rod, and the nut is connected with the arc-shaped hole. A locking bolt penetrating through the arc hole is screwed on the nut; the fixed sleeve connector comprises a sleeve connected to the arm rod, and a locking bolt is connected to the sleeve in a threaded mode. The joint fusion retractor is reasonable in structure and convenient to operate, solves the problems of unstable operation field, operation fatigue, limited adjustment and other pain points existing in traditional bare-handed retraction, and facilitates standardized and mechanized promotion of joint fusion.

The utility model discloses a lumbar facet zygopophysis joint fusion device which comprises a fusion plate, a fusion piece, a first fusion nail and a second fusion nail are fixedly arranged on one side face of the fusion plate, one end of the fusion piece is fixedly arranged on the fusion plate, and the other end of the fusion piece extends in the direction away from the fusion plate. The first fusion nail and the second fusion nail are located on the two opposite sides of the fusion piece respectively. The utility model further discloses a lumbar vertebra fixing system using the lumbar facet zygopophysis joint fusion device. According to the lumbar facet zygopophysis joint fusion device and the lumbar vertebra fixing system using the lumbar facet zygopophysis joint fusion device, advanced intervention is conducted on lumbar degenerative diseases, cost is low, trauma is small, the effect is good, and strength is appropriate.

Implant systems and methods treatment of a joint include a distal portion, a middle portion, and a proximal portion. The distal portion may include a thread having a first thread minor, a first thread major, and a first pitch. The distal portion also may have a reverse cut, helical fenestration formed through the thread. The middle portion may be devoid of threads and may include a porous outer surface structure to promote bony integration, the porous outer surface structure having a leading end and a trailing end, with the leading end having a diameter larger than the first thread minor. The proximal portion may include a proximal thread having a second thread minor, a second thread major, and a second pitch. The second thread minor may be substantially the same width as the trailing end of the middle portion.

Apparatus and methods are disclosed for correcting deformities in a patient's foot. In one example, a metatarsus adductus is addressed using a pin placement guide that is angulated to be placed in alignment with a cuneiform and a metatarsal, such that the TMT joint can be subsequently cut, and the metatarsal moved into proper alignment. Th pin placement guide can be a variable angle guide, or a kit of fixed-angle pin placement guides can be provided.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

A joint fusion preparation assembly having a self-centering, non-rigid, "floating"cutting blade deployable to a target site in a minimally invasive procedure is disclosed herein. The joint fusion preparation assembly includes an outer cannula or access conduit, an inner sleeve, a cutter component, and a bone drill component. The outer cannula includes a distal abutment surface configured to register the distal end of the outer cannula against a bony surface and a spring-loaded locking element configured to securely engage with the inner sleeve to maintain the inner sleeve at a desired position. The inner sleeve is configured for insertion into the outer cannula and includes a spring-loaded locking element configured to securely engage with the cutter component and / or the bone drill component to maintain the cutter and / or bone drill in a desired position during use.

The present invention provides a lumbar small joint fusion and fixation device that is easy to install, has a high structural stability after installation, has a strong contact friction with the bone surface, can effectively prevent movement, and has a developing wire installed in the fusion device, which can be easily observed and positioned under X-ray. The lumbar small joint fusion and fixation device includes a fusion device body and a fixed guide plate, the fusion device body is provided with a bone graft groove and a developing wire installation groove in the thickness direction, the developing wire installation groove is located on one side of the bone graft groove, the developing wire installation groove is installed in the developing wire installation groove, both ends in the thickness direction of the fusion device body are provided with anti-slip protrusions, the fixed guide plate is located on one side of the fusion device body, extends along the thickness direction of the fusion device body, and forms a "T"-shaped structure with the fusion device body, and the fixed guide plate is provided with a screw installation hole.

Devices, systems, and methods for surgical treatment of mid-foot disorders such as osteoarthritis, spacing disorders, or alignment disorders, including mid-foot arthroplasty devices and systems for the 2nd and 3rd tarsometatarsal (TMT) joint, implants for post-osteotomy spacing and realignment, arthroplasty articular implants, dowel grafts for TMT arthrodesis or fusion, dowel grafts for navicular cuneiform (NC) arthrodesis, dowel grafts for intercuneiform arthrodesis, and / or locking dowels for joint fusion.

Internal beam plates and associated instrumentation may be utilized for performing arthrodesis procedures, bone fracture procedures, osteotomy procedures, etc. Exemplary surgical methods that may be performed using the internal beam plates and associated instrumentation include, but are not limited to, lapidus bunionectomy procedures, metatarsophalangeal (MTP) procedures, chevron procedures, fracture repair procedures, etc. The exemplary internal beam plates incorporate an integral beam that is configured to increase strength and stiffness across a fusion site. The exemplary cutting / prep guides are configured to allow surgeons to reduce, prepare, and cut bones for receiving the beam of the internal beam plate using one or more guides.

An implantable device for sacroiliac ("SI") joint fusion comprises an SI joint fusion portion (150) and an anchor portion (110) of smaller diameter than the SI joint fusion portion and that extends distally from a distal end of the SI joint fusion portion. The SI joint fusion portion is externally threaded and is configured to, when surgically implanted, extend across the SI joint. The anchor portion in turn extends distally from the SI joint fusion portion and is configured for implanting entirely within the patient's ilium adjacent the SI joint. In certain configurations, the joint fusion portion is configured to enable fixation of spinal equipment at a proximal end of the joint fusion portion.

A kit for conducting a tarsometatarsal joint arthrodesis to orient a first metatarsal relative to a medical cuneiform includes a metatarsal cut guide having a positioning paddle and a cut guide slot, four wires, a cuneiform cut guide having a second locking mechanism, a third locking mechanism, a cuneiform cut guide slot and an alignment guide and a compression-distraction tool having a first sliding member, a second sliding member, a fourth locking mechanism associated with the first sliding member and a fifth locking mechanism associated with the second sliding member. The positioning paddle positioned substantially parallel to the cut guide slot. The metatarsal cut guide including a first locking mechanism.

The invention relates to the technical field of medical zygopophyseal joint fusion devices, and discloses a novel zygopophyseal joint elastic fixing device which comprises a W-shaped connecting piece and a screw assembly, the W-shaped connecting piece is of a symmetrical wavy structure and comprises three vertexes and two grooves, transition areas between the vertexes and the grooves are connected through arcs, and the screw assembly is connected with the W-shaped connecting piece. A through hole channel is formed in the W-shaped connecting piece, the screw assembly can penetrate through the through hole channel to fix the W-shaped connecting piece, the W-shaped connecting piece is made of polyether-ether-ketone materials, and the screw assembly is made of medical-grade titanium alloy. The W-shaped connecting piece is made of a polyether-ether-ketone material, the elasticity modulus of the W-shaped connecting piece is close to that of a skeleton, the lumbar vertebra is allowed to elastically move within the range of + / -3 degrees to + / -5 degrees through the symmetrical wavy structural design, the problem that the articular process joint activity capacity is lost due to a traditional rigid fusion cage is solved, and natural mechanical transmission of the spine is maintained; and the degeneration risk caused by stress concentration of adjacent sections is effectively reduced.