51 results about "Bone screws" patented technology

A modular poly-axial bone screw includes a poly-axial bone screw, a poly-axial tulip head, and a collet disposed within the tulip head, the collet interacting with the bone screw and tulip head providing an interference fit with the bone screw head to lock orientation of the tulip head on and relative to the bone screw. Inner configurations of the tulip head interact with outer configurations of the collet to lock axial and / or rotational position of the collet within and relative to the tulip head, and thus about the bone screw head. The collet also has a base configured to conform to a top of a bone screw, wherein the collet is configured to support the bone screw and the tulip head when a spine rod is fixed in the tulip head.

A retractor blade assembly having a retractor blade having a track extending long on a face of the retractor blade, a screw entry at a bottom of the retractor blade comprising a window through which a bone screw is insertable, and a screw gate which engages the track on the retractor blade. Once the bone screw is placed through the screw entry, the screw gate lowers until the screw gate blocks the window.

This invention belongs to the field of medical devices, specifically a combined internal fixator and fixation method for fixing joints with micro-motion. The combined internal fixator includes a first bone screw and a second bone screw. A movable connecting structure is provided between the connecting ends of the first and second bone screws. The movable connecting structure includes a groove and a shaft. The groove includes an insertion port and a mounting groove communicating with the insertion port. The mounting groove has a semi-circular cross-section. The shaft includes a semi-circular shaft adapted to the mounting groove, which is rotatably accommodated within the mounting groove, allowing the first and second bone screws to rotate relative to each other around a first radial axis. This invention, through a hook-groove sliding self-locking structure, achieves controllable micro-motion and integrated implantation for fixing joints with micro-motion. It has achieved significant technological advancements in preserving joint physiological function, simplifying surgical procedures, avoiding secondary surgeries, and reducing the incidence of complications. It has important clinical application value and is suitable for fixing joints with micro-motion.

A bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with an anchoring bone screw. The system allows attachment of a connector assembly having an offset angular shape for anchoring a connecting rod. The spherical ball connector using a locking ring positioned in a locking ring slot. Upon installation, the locking ring is moved to a ring containment slot to expand a retainer ring, allowing passage of a bone screw spherical ball, the retainer ring forcing the locking ring back to the locking ring slot, thereby permanently attaching the connector assembly to the anchoring bone screw. The offset between the upper and lower sections allows the rod to be received at an angle optimized for spinal alignment, thereby reducing the need for rod contouring and minimizing stress concentration on the spherical joint.

An implant (1), in particular a bone screw, for use in the animal or human body is provided. The implant (1) comprises a head (2) with a first side (3) and a second side (4), and a shaft (5) extending along a longitudinal axis (A), wherein the head (2) has at least one fluid path (6) configured to bring the first side (3) into fluid communication with the second side (4). Furthermore, a transport system (10) for the implant (1) and a method for manufacturing the implant (1) are provided.

An implantable laminoplasty device is provided that can be used in minimally invasive surgery. The device includes a main housing with an inner housing slidably receivable by an outer housing. A gear is disposed in the main housing and engageable with a gear rack of the inner housing to adjust the length of the main housing. The gear defines an aperture configured to accept a tool to translate rotational movement into linear motion. A lock is slidably disposed in the main housing sized and configured to fix the length of the main housing when the desired length is achieved by slidable translation of the inner housing in the outer housing. The device also includes a laminar shelf portion and a lateral mass connection portion defining bone screws and both being hingedly connected to the main housing.

The application discloses a lamina fixation plate system, a preparation device and a preparation method, and belongs to the technical field of medical instruments. The system comprises a central main body, two side wings and an adjustable connecting mechanism; the side wings are arranged on the two sides of the central main body respectively, the adjustable connecting mechanism connects the side wings and the central main body and allows the side wings to adjust the position and / or angle relative to the central main body; the adjustable connecting mechanism comprises various structures such as an arc-shaped sliding groove matched with an arc-shaped adjusting block, an elastic neck portion or a sliding hole matched with an adjusting rod; the side wings are provided with inverted taper bone screw holes, and the lower surfaces are provided with anti-skid teeth; the central main body is provided with a detachable drug sustained-release carrier and an auxiliary fixing interface for connecting a nail rod system. The application realizes the accurate adaptation of the side wings and the lamina stump through the adjustable connecting mechanism, enhances the fixing stability through the inverted taper holes and the anti-skid teeth, reduces the revision difficulty through the reversible dismounting design, and integrates the functions of drug sustained release and collaborative connection with the internal fixation system.

The utility model relates to medical apparatus and discloses a combined bone plate, including rib bone plate and two embrace arms of installation on rib bone plate, through the mutual matching of first fixed hole, second fixed hole, first bone screw and two embrace arms, can adjust the interval of embrace arm in advance according to the condition of rib fracture of patient before implanting in the patient's body, after adjusting to the appropriate state, implements fixed mounting operation again, thereby avoid the tedious process of secondary adjustment in the patient's body, the simple structure, convenient operation, strong practicality, through the mutual matching of positioning hole, locating block, first bone screw and two embrace arms, only need to insert locating block into positioning hole in the adjustment process, then can complete fixation by installing first bone screw again, it is worth mentioning that, the whole adjustment and fixing process can be completed in the patient's body, improves the convenience and safety of operation operation.

This utility model relates to the field of orthopedic implant technology and discloses a prosthesis for defects after partial atlas resection. It aims to solve the problems of existing technologies, such as the lack of atlas prosthesis implants, long recovery times after autologous bone grafting, and the ineffective fixation of titanium mesh implants. This utility model includes a prosthesis that replaces the atlas, with bone screw holes to accommodate bone screw fixation contact points. The prosthesis includes an outer frame, which is a porous tubular or porous columnar structure. The cavity of the porous tubular structure is filled with autologous bone, allogeneic bone, or artificial bone. The upper and lower ends of the outer frame are provided with curved surfaces matching the facet joints of the occipital condyle and axis, and a support unit is provided within the outer frame. This utility model, combined with 3D printing technology, matches the shape of the corresponding segment and resection site, thereby replacing the resected segment, promoting the fusion of the atlantoaxial segment, and facilitating the restoration of the physiological function of the upper cervical spine.

This utility model discloses a full-length locking plate for the medial aspect of the tibia, solving the technical problem that existing locking plates cannot adequately meet user needs. The device includes a locking plate body with an arc-shaped cross-section. One surface of the locking plate body is adapted to the shape of the medial aspect of the tibia. The locking plate body is an integral structure composed of a proximal head, a body, and a distal head. The proximal head is connected to the first end of the body, and the distal head is connected to the second end of the body. Multiple universal holes are provided on both the proximal and distal heads. By setting one side of the locking plate body to conform to the shape of the medial aspect of the tibia, this application allows the locking plate body to fit snugly against the medial aspect of the tibia. Furthermore, when the locking plate body is fixed through the multiple universal holes on the proximal and distal heads, the installation direction of the bone screws can be determined according to the fracture condition, ensuring even force distribution on the locking plate body and improving user comfort.

A bone plate (100) incorporating a length adjusting elongate hole (130) formed in a shaft portion (115) thereof, along with corresponding methods of use, are disclosed herein. In one embodiment, the length adjusting elongate hole (130) is arranged and configured to receive one or more bone fixation devices (e.g., bone screws). In use, the bone fixation device positioned within the length adjusting elongate hole (130) may be partially loosened, without removal, to enable the patient's bone to be adjusted (e.g., loosening the bone fixation device within the length adjusting elongate hole allows the surgeon to adjust the position of the patient's bone, and hence the bone fixation device coupled thereto, relative to the bone plate). Once properly adjusted, the bone fixation device positioned within the length adjusting elongate hole (130) may be retightened. In various embodiments, the length adjusting elongate hole (130) is arranged and configured so that, in use, each of the plurality of bone fixation openings remains available to a surgeon.

An intramedullary ("IM") nailing system and corresponding methods for fixing a fracture of the greater trochanter in a patient are disclosed. In some embodiments, the IM nailing system comprises an IM nail and a plate or washer. When in use, the plate or washer includes one or more holes or openings to allow a bone screw to pass through the plate or washer and engage with a corresponding hole formed in the IM nail. Arranged in this manner, when in use, the IM nailing system facilitates the fixation of the patient's greater trochanter by fixing and / or compressing the patient's greater trochanter between the plate or washer and the IM nail.

A medical bone screw with a new structure capable of improving fixation strength with human tissue such as bone tissue and minimizing damage to human tissue during insertion is disclosed. The medical bone screw includes a head, a body connected to the head and having a spiral shape with dimensions appropriate for medical bone screw applications, and a central space defined by the body.

The present disclosure includes bone screws, spinal implant, drivers, and their assemblies thereof or surgical procedures of the spine including but not limited to anterior lumbar interbody fusion (ALIF) procedures.

This utility model discloses a bone screw, comprising: a screw body, which is columnar, with threads on its outer periphery and a plurality of helical grooves evenly distributed on its outer periphery. The helical grooves spirally surround the screw body and spirally penetrate the screw body along its axial direction. This bone screw can effectively reduce implantation resistance while facilitating bone tunnel repair and preventing dislodgement.

A force detection bone screw device includes a bone screw body, a spring structure, a detection module, and an antenna module. The bone screw body includes a cylinder. The spring structure, the detection module and the antenna module are respectively arranged in the accommodation portion of the column. The spring structure includes a body, a bearing part, a fixing part and at least one bending strain structure. One end of the body is connected to the bearing part, and the other end of the body is connected to the fixing part, and the fixing part is fixed in the cylinder. Each bending strain structure is respectively provided on the body. The body has an axial direction, and each bending strain structure has deformation in at least one direction different from the axial direction. The detection module includes at least one strain element and a sensing component.

This application relates to the field of medical device technology, providing a programmable shape memory bone screw, its preparation method, and its application. The programmable shape memory bone screw comprises a screw body made of shape memory polymer material, the surface of which is coated with a polydopamine layer, and the surface of the polydopamine layer is coated with a calcium ion-arginine composite coating. The provided bone screw possesses superior mechanical and shape memory properties; it can utilize its shape memory function to provide mechanical stress stimulation to bone defect tissue, thereby activating mechanically sensitive calcium ion channels, inducing the influx of calcium ions and arginine from the coating into cells, thereby upregulating the NO-cGMP pathway, synchronously coordinating osteogenic and angiogenesis, and accelerating bone repair; it has an osteogenic-angiogenic coupling function, which can enhance and accelerate bone regeneration, exhibiting excellent biomechanical properties and synchronously coordinating osteogenic and angiogenesis during the bone repair process.

Disclosed are devices, systems and methods for inserts for sacroiliac joint arthroplasty, which can include the employment of a longitudinal bone screw and associated threaded cylindrical sleeve, received on a proximal end of the bone screw, with a collet, nut or other securement feature holding the sleeve onto the screw. The sleeve can selectively articulate and / or be immobilized relative to the bone screw, with the system allowing for, at a surgeon's option, motion preservation between bone surfaces in some surgical applications while being utilized as an immobilizing and / or fusion construct between bone surfaces during other surgical applications.

Provided herein are medical devices and methods for treating bone fractures. The medical device comprises a body, a scaffold within the body, and a means for focusing bone growth throughout the body. The device is designed to minimize shear stresses on a distal tip and distribute micromotion to encourage bony ingrowth. The scaffold may include a triply periodic minimal surface (TPMS) with a cubic repeating pattern defining walls within the scaffold, and the TPMS may be helically wrapped around a central axis of the device. The device may also house biologic agents and accommodate an autologous product. In some embodiments, the medical device is a bone screw or a pedicle screw, designed to reduce common issues such as screw loosening, screw backout, and rod breakage. The method of treatment involves implanting the medical device into a patient's bone to aid fracture healing.

The invention relates to a screw (1), preferably a bone screw, comprising a shaft (2) with a tip (3), a head (4) and a thread (5). The shaft further comprises a longitudinal axis (A). An array of radial cross-sectional surfaces (Q) of the head (4) extend through the longitudinal axis (A) of the screw (1), the location of each radial cross-sectional surface (Q) being defined by an azimuth angle (6) in a plane (E) perpendicular to the longitudinal axis (A). Each radial cross-sectional area (Q) has an area defined by the longitudinal axis (A) and the outer surface of the screw (8). The thread (5) extends into the head (4) in such a way that the surface areas of the radial cross-sectional surfaces (Q′) in a first azimuth angle range (9) are constant and the surface areas of the radial cross-sectional surfaces (Q″) in a second azimuth angle range (10), which is different from the first, have a different, preferably smaller, value than the surface areas in the first azimuth angle range (9). The first azimuth angle range (9) is at most 350°, preferably at most 345°.

The utility model relates to surgical instrument technical field especially relates to a kind of orthopedics broken nail taking-out device, specifically includes: annular sleeve and locking strip, annular sleeve lower end is provided with sawtooth, and the inner wall of annular sleeve is recessed strip-shaped recess;The main part of locking strip can be inserted into strip-shaped recess, and can move in strip-shaped recess, and locking portion is located in strip-shaped recess outside, in the cavity of annular sleeve. Through annular sleeve rotation, the sawtooth of annular sleeve lower end can cut into bone, then locking strip is inserted into strip-shaped recess, and the locking portion of locking strip is embedded in the thread of broken nail, annular sleeve is rotated, and broken nail is rotated by locking strip, to be taken out from bone. The orthopedics broken nail taking-out device disclosed in the utility model, annular sleeve only needs to destroy the small area bone around broken nail, to take out broken nail, solve the problem that the bone around broken nail is more serious in prior art due to the blunt and large occlusion of broken nail forceps, tiger forceps, wire ligature forceps, so that the broken nail around the bone is more serious.

This utility model belongs to the field of medical device technology, specifically disclosing an integrated bone transport internal fixation plate, including a fixation plate body with several through-holes in a composite threaded pattern. Kirschner wire holes are symmetrically located at both ends of the fixation plate body. A fixation post is mounted on the left side of the fixation plate body via a connecting frame, and several C-clamps are fitted onto the fixation post. This utility model uses the composite threaded holes in conjunction with bone screws to internally fix bone defects in patients. The number of fixation screws can be selected according to the patient's specific condition. Simultaneously, the C-clamps, which can rotate on the fixation post, fix the free bone segment, allowing the free bone segment to be effectively fixed while sliding along the fixation post, facilitating bone transport and further reducing the degree of tissue damage caused by bone transport surgery.

The application discloses a wrist joint prosthesis, relates to the technical field of medical devices, and comprises a carpal bone connecting assembly, a radius connecting assembly and a locking structure; the carpal bone connecting assembly comprises a carpal bone bracket, a carpal bone pad in sleeve joint with the carpal bone bracket, a carpal bone positioning column in separable plug joint with the carpal bone bracket and two bone screws for being connected with carpal bones, the screw caps of the bone screws are in sliding joint with straight through holes on the carpal bone bracket, and the carpal bone bracket is in separable connection with the bone screws through the locking structure; the radius connecting assembly comprises a radius bracket and a radius extension handle, the radius bracket is in separable connection with the radius extension handle through a clamping structure, and the radius bracket is provided with a circular arc surface matched with the carpal bone pad. The application is convenient and reliable to use, and is convenient for local structure adjustment or replacement in a later surgery process.

This application relates to a universal bone screw, surgical instrument, and insertion device. The universal bone screw includes: a ball seat with a through-hole receiving cavity; a ball head at one end of the screw body that is adapted to the receiving cavity, the ball head having a locking head on its end face for fixed connection with an instrument unit; when the screw body is inserted into the ball seat and the ball head is located in the receiving cavity, the bottom surface of the ball head abuts against the bottom of the receiving cavity, and the ball head can rotate within the receiving cavity to adjust the angle between the screw body and the ball seat. The universal bone screw adjusts the angle between the screw body and the ball seat by rotating the ball head within the receiving cavity, thereby adapting to irregularities on the bone surface. This not only improves the stability of screw fixation during orthopedic surgery and reduces the risk of loosening, but also ensures navigation accuracy and surgical efficiency.

A device (25) for drilling holes in bone and configured to determine bone screw length, the device (25) including a surgical power drill (2) comprising: a) a housing (12) and; b) a measuring device (1) releasably attached or fixed to the housing (12), wherein the measuring device (1) is configured to measure the distance (x) covered by the housing (12) in the direction of the longitudinal axis (7) and relative to a surface of an implant (26) or a bone during a drilling process, wherein the measuring device (1) comprises a processing unit (14) to record the distance (x) covered with respect to time; the processing unit (14) comprises one or more differentiators to determine at least the first and second derivatives of the distance (x) covered with respect to time; and the processing unit (14) further comprises a peak detector to analyze one or more peaks occurring in the graph of the highest derivative with respect to time, and wherein the measuring device (1) comprises a laser device or an ultrasound position sensor for displacement assessment.

The invention relates to an implant (1), in particular a bone screw, for use in the animal or human body. The implant (1) comprises a head (2) having a first side (3) and a second side (4), and a shaft (5) extending along a longitudinal axis (A), the head (2) having at least one fluid path (6) designed to bring the first side (3) into fluid communication with the second side (4). The invention also relates to a transport system (10) for the implant (1) and to a method for producing the implant (1).

Provided herein are medical devices, assemblies, and methods for circulating material in medical devices. The adapter comprises a shaft, a cannula, a female aperture lock, a male conical surface, and a thread, all designed for reversible engagements and material circulation. The assembly incorporates this adapter and is designed for use with a variety of medical devices, including bone screws. The method involves engaging a pressure device and a medical device with a scaffold to the adapter, and circulating material in the medical device through negative or positive pressure. These innovations offer a versatile approach for circulating material in medical devices, which can be beneficial in various medical procedures and treatments, enhancing the efficiency and effectiveness of material circulation.