25 results about "Joint fusion" patented technology

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.

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.

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.

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 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.

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.

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.

Decortiating screws and insertion tools for implanting the decorticating screws including screws that anchor into a first and a second bone to fuse the two bones together. The screws include a rotatable bladed section to decorticate a joint space between the first and second bone. The screws also optionally include a cap to secure the screws in the bone and apply compression to the joint to be fused. In some embodiments, the decorticating screws are useful for sacroiliac (SI) joint fusion.

Devices, systems and methods for joint fusion or arthrodesis of articular joints in treatment orthopedic disorders, including a dowel fusion kit, a frustoconical dowel configured to be implanted within the articular space of an articular joint and secured within the joint by either or both of a compression screw and / or a staple.

The application belongs to the technical field of medical equipment, and discloses a atlantoaxial lateral mass joint fusion cage, which comprises a fusion cage shell, the inner wall of the fusion cage shell is slidably connected with a supporting block, the inner wall of the supporting block is rotatably connected with a rotating rod, the outer wall of the rotating rod is fixedly connected with a threaded rod, the outer wall of the fusion cage shell is threadedly connected with a positioning bolt, the outer wall of the supporting block is provided with a supporting mechanism, the supporting mechanism comprises a sliding block, the inner wall of the sliding block is hingedly connected with a supporting rod, and the outer wall of the fusion cage shell is fixedly connected with a fixed plate. 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 volume is small, the fusion cage shell is convenient to insert and install between atlantoaxial lateral mass joints, the overall structure is simple, the adaptability is high, use is convenient, and the process of installation of the fusion cage shell by medical staff is facilitated.

Described herein are various implementations of systems and methods for treating back pain (e.g., chronic low back pain) caused by different (e.g., independent) sources of pain, such as pain originating or stemming from intervertebral discs, from vertebral endplates, and / or from intraosseous locations within one or more vertebral bodies. For example, methods for treating back pain (e.g., chronic low back pain) may involve both vertebral fusion (e.g., arthrodesis or spondylodesis to fuse adjacent vertebrae) and neuromodulation (for example, ablation of nerves within or surrounding one or more of the adjacent vertebrae). The neuromodulation may facilitate treatment of pain that is generated by insertion of fusion hardware.

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.

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.

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.

The application relates to a dynamic continuous compression intramedullary nail and a use method thereof, and belongs to the medical instrument field. The dynamic continuous compression intramedullary nail comprises a main nail, a fixing through hole for placing a first fixing bolt is arranged on the main nail, a static through hole and a plurality of dynamic through holes matched with the fixing through hole are arranged on the main nail, a compression groove is arranged on the main nail, a compression assembly is arranged in the compression groove, and the static through hole and the dynamic through holes are used for placing second fixing bolts. According to the fracture condition of a patient, the second fixing bolts are placed in the static through hole or the dynamic through holes, the compression assembly continuously compresses the second fixing bolts in the dynamic through holes, the patient is not prone to bone resorption, bone subsidence and other phenomena at two fracture sections of bone healing, and the healing speed is accelerated. The application is especially suitable for ankle joint tibial tarsal calcaneal three-joint fusion fixation, responds to and adapts to the activity change of an ankle joint, achieves a dynamic fixation effect, and is also suitable for femoral head allogeneic material transplantation and other auxiliary fusion operations.

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.

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 invention discloses an adjustable atlantoaxial joint fusion cage and an adjusting method, and relates to the technical field of medical instruments.The adjustable atlantoaxial joint fusion cage comprises a fusion cage body, first square plates are symmetrically and movably connected to the outer side of the fusion cage body, and an adjustable deformation assembly is jointly arranged between the fusion cage body and the first square plates; the adjustable deformation assembly comprises a plurality of supporting cylinders installed on the outer side of the fusion cage body, a plurality of movable blocks installed on the side face of the first square plate, movable plates movably connected with the inner sides of the supporting cylinders, and first springs jointly installed between the circular plate and the movable plates. The fusion cage main body and the first square plate are locked in the initial fusion stage to provide stable support for bones, the physiological needs in the initial bone healing stage are met, deformation is unlocked in the later fusion stage, joint function recovery is promoted, and the elastic coefficient of the first spring can be changed and the friction force between the rubber plate and the circular plate can be increased according to the bone conditions of different patients. Therefore, the deformation amplitude is adjusted.

The invention relates to an ankle arthrodesis device comprising a pin (1) intended to be implanted in a tibia (Ti), a talus (Ta) and a calcaneus (Ca), the pin (1) comprising a proximal portion (2) extending along a first direction (A-A′), and a distal portion (4) extending along a second direction (B-B′) that intersects the first direction (A-A′), the distal portion (4) being provided with a first oblong attachment opening along the second direction (B-B′), the device comprising a first compressive attachment means (9A), of the compression screw type (9A), the pin (1) being designed and configured such that, when it is implanted with its distal portion (4) oriented toward the back of the ankle, the first attachment opening is arranged to receive and guide the first attachment means (9A) along a first attachment direction (F1-F1′) extending along said talus (Ta) and calcaneus (Ca) to attach the nail to the talus (Ta) and to the calcaneus (Ca).

An implant system for the fusion of the occipitocervical joint is provided. The system involves a pair of plates including a right plate and a left plate. The right plate has a first right plate opening and a second right plate opening. The left plate has a first left plate opening and a second left plate opening. The system also includes at least four bone fixation fasteners. Two fasteners are engageable with the plates and capable of fixing with the occipital condyle. The other two fasteners are engageable with the plates and capable of fixing with the C1 lateral mass.

Assemblies of one or more implant structures make possible the achievement of diverse interventions involving the fusion and / or stabilization of the SI-joint and / or lumbar and sacral vertebra in a non-invasive manner, with minimal incision, and without the necessitating the removing the intervertebral disc. The representative lumbar spine interventions, which can be performed on adults or children, include, but are not limited to, SI-joint fusion or fixation; lumbar interbody fusion; translaminar lumbar fusion; lumbar facet fusion; trans-iliac lumbar fusion; and the stabilization of a spondylolisthesis.