31 results about "Fracture block" patented technology

The application belongs to the technical field of medical image processing, and particularly relates to a kind of bone fracture block automatic reduction methods based on medical image;Including: obtaining the three-dimensional medical image data and three-dimensional label data after fracture of the object to be processed, and pre-processing the three-dimensional medical image data after fracture;The three-dimensional medical image data after fracture is input into the fracture surface segmentation model trained, and the main bone surface area and fracture block surface area are obtained;Three-dimensional coordinates are extracted and main bone surface point cloud and fracture block surface point cloud are constructed;Iterative closest point registration is carried out on the two kinds, and the cumulative rigid body transformation parameter is obtained;The voxel coordinate set corresponding to the fracture block is determined, and the voxel coordinate set is subjected to spatial transformation using the cumulative rigid body transformation parameter, to obtain the three-dimensional label result after reduction;The application can simultaneously complete the problems of automatic identification of fracture section and automatic solution of fracture block reduction posture, improve the degree of automation, result stability and interpretability of fracture block reduction process.

This invention relates to the field of connecting rod processing technology, specifically to a fracture device and method for connecting rods in large machinery. The device includes a laser marking machine worktable, a fracture device worktable, and a connecting rod. A laser marking machine and a laser marking feeder are mounted on the upper end of the laser marking machine worktable. A fracture device is mounted on the upper end of the fracture device worktable. The laser marking feeder and the fracture device are used for positioning the connecting rod. The laser marking feeder includes a small-end positioning pin and a large-end positioning pin. The small-end positioning pin is used for positioning the small end of the connecting rod, and the large-end positioning pin is used for positioning the large end of the connecting rod. The fracture device includes a small-end positioning component and a fracture block. The small-end positioning component is used for positioning the small end of the connecting rod, and the fracture block is used for limiting the fracture of the large end of the connecting rod. Compared to existing sawing processes for connecting rods in large machinery, the laser marking fracture process of this invention simplifies the processing flow and improves the performance of the connecting rod.

The invention provides a fixing steel plate for proximal humerus comminuted fracture, and relates to the technical field of proximal humerus fracture, the fixing steel plate comprises a main steel plate with a connecting hole and a branch steel plate fixed with the main steel plate through the connecting hole; a plurality of extending claws are arranged on the side, away from the main steel plate, of the branch steel plate, and fixing structures are arranged at the ends of the extending claws and can connect bone fragments and make the bone fragments tightly attached to the main bone. The branch steel plates can be strip-shaped or ring-shaped, and the extension claws can be integrally formed or detachably combined. The problems that a traditional steel plate can only be placed on the outer side, and when fractures are smashed, the upper rear large nodule and the inner fracture blocks are difficult to fix and prone to displacement or internal fixation fails are solved, all-directional fixation is achieved, the steel plate is suitable for different fracture scenes, operative wounds are reduced, and shoulder joint function recovery is assisted.

The femoral multi-dimensional interlocking intramedullary nail structure comprises an aiming support, the top of the aiming support is connected to one end of a connecting handle, the other end of the connecting handle is connected to an intramedullary nail, and the two sides of the top of the aiming support are connected to one end of a left support and one end of a right support respectively; a left sleeve is inserted into the other end of the left support, a right sleeve is inserted into the other end of the right support, a left cross nail is connected to the end of the left sleeve, a right cross nail is connected to the end of the right sleeve, an aiming tube is inserted into the bottom of the aiming support, and a blade nail is connected to the end of the aiming tube. According to the internal fixation device, proximal femur fracture accompanied by split fracture of the outer side wall of greater trochanter of femur and small fracture blocks around the greater trochanter are held, so that firmer internal fixation is achieved, and internal fixation failures such as nail withdrawing and nail breaking caused by poor holding can be effectively prevented.

The invention relates to the technical field of medical instruments, in particular to an internal fixing structure for posterior cruciate ligament tibia dead center fractures, which comprises a tail plate, a plurality of movable screw holes are formed in the front side of the tail plate in a penetrating manner, a plurality of locking screw holes are formed in the rear side of the tail plate in a penetrating manner, and two head plates are fixedly mounted at the front end of the tail plate. A notch is formed between the two head plates, a plurality of fixing screw holes are formed in the surfaces of the head plates in a penetrating mode, sliding grooves are formed in the positions, close to the edges, of the left side and the right side of each head plate, and deformable needles formed in a bent mode are arranged in the sliding grooves. By dissecting the attached head and tail plate structures, adopting an encircling type fixing mode and adopting the combined design of the adjustable deformable needles and multiple types of screw holes, multi-angle, dispersive and pressurized stable fixing of the tibia dead center fracture blocks is achieved, and ligament protection and operation flexibility are taken into account while the fixing strength and stability are improved.

The invention relates to the technical field of fracture reduction forceps, in particular to reduction forceps for metacarpal bone comminuted fracture, which comprise a forceps handle I and a forceps handle II, a rotating shaft is mounted at the intersection of the forceps handle I and the forceps handle II, limiting blocks are mounted on the inner sides of the upper ends of the forceps handle I and the forceps handle II, an elastic piece is mounted between the two limiting blocks, and the elastic piece is connected with the rotating shaft. A guide frame is installed on the first plier handle, a fixed plier head is installed at the lower end of the first plier handle, and an adjustable plier head is fixedly installed at the lower end of the second plier handle. The precise adjusting mechanism composed of the telescopic shaft, the ball head unit and the multiple tong head units is arranged in the adjustable tong head, so that a doctor can conduct synchronous or respective precise angle adjustment on the multiple tong head units according to spatial distribution of metacarpal bone comminuted fracture blocks; by means of the mechanical arm, multiple clamping points can be derived from one entry point, multiple bone blocks in different planes and at different angles can be synchronously clamped, the three-dimensional structure of the metacarpal bone is effectively recovered, and the mechanical arm is suitable for complex comminuted fractures.

The invention provides a fracture blocking rate inversion method based on GNSS earth crust deformation observation and elastic dislocation theory constraint, and the method comprises the steps: constructing a fracture three-dimensional model and an elastic dislocation constraint model, and calculating a fracture blocking rate. Through multi-period result comparison, strain field verification and earthquake activity verification, a high-risk region of pregnancy and earthquake can be identified. According to the method, the GNSS earth crust deformation observation elastic dislocation theory is adopted to constrain the negative dislocation model, and the precision and stability of fracture blocking rate inversion are remarkably improved. According to the invention, multiple periods of GNSS data are integrated to realize dynamic inversion, and the evolution trend of the locking state can be captured. According to the method, secondary blocks are finely divided, strain rate field constraints are introduced, locking distribution of a local strain enhancement area is accurately identified, the reliability of judgment of a large earthquake risk area is improved, a fracture high-locking-rate area is defined, through theoretical constraint and multi-source data fusion, the fracture locking rate inversion precision and the dynamic capture capability are improved, and the method is suitable for large-scale popularization and application. And reliable technical support is provided for earthquake risk assessment.

This invention relates to the field of medical devices. To address the technical problems of easy loss of reduction, uncontrollable pressure, and poor reduction stability when fixing a quadrilateral acetabulum in existing technologies, this invention proposes a pressure-type anatomical reduction device specifically for the quadrilateral acetabulum. The device includes a pressure reduction plate and a limiting fixation plate. One end of the pressure reduction plate is connected to one end of the limiting fixation plate via an arc-shaped connecting section. A conical positioning post is provided on the other end of the limiting fixation plate for pre-positioning a second fracture fragment. The extension direction of the conical positioning post intersects with but is not perpendicular to the axis of the limiting fixation plate. At least one limiting screw hole is provided on the limiting fixation plate, through which the limiting fixation plate attaches and positions the second fracture fragment. Multiple reduction screw holes are provided on the pressure reduction plate, through which the pressure reduction plate applies pressure to reduce the first fracture fragment. Furthermore, this invention also proposes a method for using the pressure-type anatomical reduction device specifically for the quadrilateral acetabulum.

The utility model discloses a nail plate for tibia, and relates to the technical field of nail plates. The nail plate for the tibia comprises a repairing plate, the repairing plate is in a sickle shape, one end of the repairing plate is in an arc shape, a first left inclined groove and an upper inclined groove are formed in the repairing plate, a first fixing nail is arranged in the first left inclined groove, a second fixing nail is arranged in the upper inclined groove, and the first left inclined groove and the second left inclined groove are communicated with each other. The mounting direction of the first fixing nail faces the left side, the mounting direction of the second fixing nail faces the inclined upper side, the repairing plate is made of a titanium alloy material, and a medical sterile silica gel pad is arranged on one side of the repairing plate. And four thin grooves are formed in one end of the repairing plate. The problem of infirm internal fixation can be perfectly solved by exposing a fracture end through subperiosteal separation, inserting a repair plate, placing nails into a fracture block and then applying fixation and locking.

A reduction and fixation device and a method for non-radiologic closed reduction and nailing with a weight bearable nail for femoral fractures. The reduction and fixation device includes a proximal trifurcation device, a distal trifurcation device, a length adjusting nut, and an alignment rod. The proximal trifurcation device is configured to be attached and secured to a proximal fragment of a fractured femur of a patient. The distal trifurcation device is configured to be attached and secured to a distal fragment of the fractured femur of the patient. The proximal trifurcation device, the distal trifurcation device, the length adjusting nut, and the alignment rod are configured to manipulate a proximal fragment and a distal fragment of a fractured femur to restore their alignment and orientation to a pre-fracture state.

This invention discloses an integrated preoperative planning system and method for locking plates in proximal humeral fractures, comprising: a data preprocessing module for processing CT data; a fracture segmentation and 3D reconstruction module for segmenting and generating fracture fragment models; a target anatomy prediction and fragment disposal module for predicting target anatomical morphology and classifying fracture fragments; a surgical feasibility-constrained virtual reduction module for virtual reduction under anatomical and clinical constraints; a plate fitting and fixation planning module for optimizing plate fit, screw configuration, and generating equivalent fixation parameters; a finite element modeling and solving module for automatic mechanical simulation; and a risk assessment and closed-loop optimization module for assessing risks and triggering replanning to achieve closed-loop optimization. This invention significantly reduces preoperative planning time, improves the mechanical reliability and clinical fit of the plan, and provides a quantitative basis for surgical decisions.

The utility model discloses a hook-shaped fixing steel plate for ulna coracoid process fracture. The device comprises a main plate, a protruding attaching part and a hook part which are integrally arranged and are integrally in a hook shape. The hook part is matched with the upper surface of the ulna coracoid process in shape, and the outer edge of the hook part is in a blade shape; the protuberance fitting part is matched with the anatomical form of the coronal process lateral column, and the main plate is matched with the anatomical form of the lower end part of the coronal process lateral column; a plurality of screw holes are formed in the protruding attaching part and the main plate. The fixing effect on small fracture blocks is optimized, the postoperative effect is guaranteed, and the living quality of a patient is improved.

A reduction and fixation auxiliary device for free condylar fractures relates to the field of surgical instrument technology. This invention solves the problem of fragmentation in existing condylar fracture reduction instruments due to the inability to accurately determine the clamping force required for different patients. The invention comprises three clamping heads distributed circumferentially and each hinged to the jaw end of a clamping forceps via a rod. Each clamping head includes a clamping shell, a pressure sensor, and an elastic buffer block. The clamping shell has a groove, the pressure sensor is embedded in the bottom of the groove, and the elastic buffer block fills the groove and covers the pressure sensor. The clamping head contacts the fracture fragment through the elastic buffer block to buffer and transmit the clamping force. The pressure sensor is used to detect the clamping force on the elastic buffer block in real time. This invention is used for the reduction and fixation of free condylar fractures.

The application discloses a surgical method for the reduction and fixation of a posterior cruciate ligament tibial insertion avulsion fracture under the guidance of ultrasound, and is especially suitable for the reduction treatment of a posterior cruciate ligament tibial insertion avulsion fracture. The surgical method comprises the following steps: acquiring fracture information of a patient by means of an ultrasonic positioning device, wherein the fracture information at least comprises position information of a fracture block; planning a surgical path according to the fracture information, wherein the surgical path extends from the body surface of the patient to the fracture block; placing a guide needle along the surgical path, wherein the distal end of the guide needle is arranged close to the fracture block; placing a cannula device along the guide needle, wherein the distal end of the cannula device is arranged close to the fracture block, a working channel is formed in the cannula device, and the guide needle is accommodated in the working channel; performing a reduction operation on the fracture block; making a kirschner wire pass through the working channel and temporarily position the fracture block; opening at least two bone tunnels in a main bone adjacent to the fracture block by means of a drilling device; making a suture thread pass through the at least two bone tunnels; and fixing the two ends of the suture thread.

The novel endoscope working sleeve suitable for reduction of the intra-spinal fracture block comprises a sleeve body, a pulling-up part is hinged to the front face of the sleeve body, a pulling-up connecting rod is further hinged to the lower face of the pulling-up part, and the pulling-up connecting rod penetrates out of the tail end of the sleeve body. According to the utility model, a blank in the market is filled with a simple structure, and the endoscope working sleeve can be used for rotating, prying and resetting a fracture block in a tube; particularly, the lifting part at the front part of the equipment can be subjected to pitching adjustment, and an anti-skid surface is arranged outside the lifting part; the angle of a fracture block can be adapted, and the anti-skidding effect is achieved in the turning and pulling process.

This invention discloses a fixation device for long bone fractures, belonging to the field of medical devices. It includes a limiting part, a base, elastic sutures, a reduction mesh sleeve, and a support adjustment rod. The limiting part is fixedly connected to the wall of the long bone shaft. The first end of the base is fixedly connected to the limiting part, and the second end of the base has an internally threaded hole extending towards the first end. The elastic suture extends from the second end of the base. Multiple elastic suture threading holes are discretely distributed on the reduction mesh sleeve. One side of the support adjustment rod is threadedly connected to the internally threaded hole, and the other side is fixedly connected to the reduction mesh sleeve. Multiple elastic sutures extending from the second end of the base pass through the fracture fragments at the bone ends and then fix the fracture fragments to the side of the reduction mesh sleeve facing the base via the aforementioned threading holes. This invention enables stable reduction of long bone fracture fragments, and only requires micro-holes for threading at the fracture ends, avoiding the trauma caused by numerous bone screw holes.

The invention discloses an intertrochanteric fracture navigation method and system, and relates to the technical field of intertrochanteric fracture navigation. The intertrochanteric fracture navigation method comprises the following steps: acquiring medical image data of a side hip joint area, and constructing a three-dimensional digital model; identifying a fracture line and a plurality of key bone anatomical mark points in the three-dimensional digital model; marking a near-end head and neck fracture block and a far-end backbone fracture block in the three-dimensional digital model based on a fracture line in the three-dimensional digital model; the method comprises the following steps: extracting a spatial attribute set between a near-end head and neck fracture block and a far-end backbone fracture block in a three-dimensional digital model on the basis of each key bony anatomical mark point in the three-dimensional digital model. The spatial attribute set between the near-end head and neck fracture block and the far-end backbone fracture block in the three-dimensional digital model is based on the spatial attribute set between the near-end head and neck fracture block and the far-end backbone fracture block in the three-dimensional digital model; and the target virtual implantation channel is automatically planned in the three-dimensional digital model in combination with the preset mechanical bearing area parameters so as to be used for navigation planning suggestions, so that the precision of preoperative navigation planning is realized.

The present application relates to the field of orthopedic biomedical technology, specifically, a proximal humerus fracture intramedullary bone cement support rod, which comprises a bone plate, a plurality of first connecting holes and a plurality of second connecting holes are formed on one side of the bone plate, and a solid bone nail is arranged in the first connecting hole. The device can inject bone cement into the bone marrow cavity through the injection channel and the injection port, and then solidify into a rod body to tightly fill the bone marrow cavity space. Through the cooperation of the bone plate and the bone cement support rod in the bone marrow cavity space, a support structure is formed on both sides of the humerus, the stress during the movement of the patient's arm is evenly distributed on both sides of the humerus, the fixation stability is significantly improved, the risk of internal fixation failure such as steel plate displacement and screw cutting is effectively reduced, the bone cement support rod can also prevent the displacement of the fracture block, promote the repair of the fracture, reduce the extrusion and friction of the surrounding tissue of the filling part, reduce the inflammatory reaction and postoperative pain, and improve the comfort of the patient's recovery.

The utility model discloses a greater tuberosity humerus steel plate structure in the technical field of medical instruments, which comprises a plate body, a first bendable part and a second bendable part are mounted on the surface of the upper end of the plate body side by side left and right, and first lock nail holes are fixedly formed in the surfaces of the first bendable part and the second bendable part in a penetrating manner; three sets of sewing holes are formed in the upper portion of the surface of the plate body side by side in a left-right penetrating mode, a second lock nail hole and a third lock nail hole are formed in the portion, below the sewing holes, of the surface of the plate body in a penetrating mode, and a fourth lock nail hole is formed in the portion, below the second lock nail hole and the third lock nail hole, of the surface of the plate body in a penetrating mode; the plate body structure solves the problems that according to a traditional proximal humerus steel plate, for a greater tuberosity humerus fracture block, 3.5 locking nails easily increase the crushing degree of the fracture block, and the fracture block cannot be effectively fixed, but the two first bendable pieces and the second bendable pieces at the head end of the plate body structure and the first locking nail holes can effectively prevent the greater tuberosity humerus fracture block from moving upwards, and the fracture block cannot be effectively fixed. And a fracture block can be effectively fixed.

This invention discloses a surgical instrument for closed reduction and minimally invasive fixation of pelvic fractures, belonging to the field of medical device technology. It includes: a reduction frame, consisting of two P-shaped frames made of X-ray-permeable material and connecting rods, connected to a standard orthopedic operating table to form a stable frame surrounding the patient's pelvis; and a controllable push-pull device, employing a bidirectional threaded transmission structure, one end connected to the reduction frame and the other end clamping the bone screw implanted in the pelvis, enabling linear push-pull of the bone screw for precise reduction of the fracture fragments. One of the controllable push-pull devices also integrates an anti-rotation mechanism, reliably preventing the bone screw from rotating during the push-pull process, thus solving the problem of bone screw dislodgement due to internal rotation during reduction in osteoporotic patients. This invention is highly versatile, avoids affecting intraoperative fluoroscopy, achieves multidimensional, precise, and controllable reduction of pelvic fractures, and firmly maintains the reduction until fixation is complete. It is minimally invasive, easy to operate, and significantly improves surgical efficiency and safety.

The invention provides a femoral condyle hoffa fracture fixing plate which comprises an axe handle part, an axe head part and a connecting part which are integrated, the side part of one end of the axe handle part is connected with the axe head part through the connecting part, and the axe handle part, the axe head part and the connecting part are each provided with a plurality of bolt holes. Bolts are installed in the bolt holes, so that the fixing plate for the femoral condyle hoffa fracture is connected with the femoral condyle. The connecting part adopts an arched bulge design, the bottom of the connecting part is not in contact with a bone, the axe part is arranged corresponding to a fracture block, and a plurality of rows of bolt holes are formed in the axe part. The fixing plate for the femoral condyle hoffa fracture is of an axe-shaped structure, is provided with a structure for avoiding irritation to a side collateral ligament dead point, is beneficial to rehabilitation of a patient, can achieve the effects of anatomical reduction and firm fixing, can be matched with all types of femoral condyle hoffa fractures, and is higher in applicability.

The application discloses a mesh-integrated fixing anchor, which comprises an anchor body, a flexible mesh, and a connecting belt. The anchor body comprises a needle tip part, a threaded part, and a tail part. The needle tip part is used for penetrating the bone cortex to assist the anchor body to be placed. The threaded part is fixedly connected with the bone in a threaded mode to provide an anti-pulling-out force. The tail part is fixedly connected with the flexible mesh. The flexible mesh is attached to the surface of a fracture block to be reset and is used for forming compression and limiting the fracture block in a reset position through cooperation with the anchor body. One end of the connecting belt is fixedly arranged on the flexible mesh, and the other end of the connecting belt is connected with the tail part of the anchor body. The connecting belt can tighten the flexible mesh.

The application discloses a medical fracture reduction forceps, which comprises a reduction forceps body, the end of the reduction forceps body is arranged in an arc shape, and the reduction forceps body is arranged in an arc shape; and a fixing plate is fixedly connected to one side of the reduction forceps body, and belongs to the technical field of medical instruments. The device clamps the bone block through the reduction forceps body, the reduction forceps body is arranged in an arc shape, can directly pass through the bone plate, increases the convenience of operation and the firmness of fracture reduction, facilitates the steel plate to directly pass through the middle of the reduction forceps, avoids the displacement of the Kirschner wire when the Kirschner wire is used to fix the fracture block and place the steel plate, avoids the displacement of the bone block caused by the temporary fixation of the Kirschner wire and the secondary clamping of the reduction forceps body, the end of the reduction forceps body is arranged in an arc shape, avoids the tip of the straight forceps clamping teeth from penetrating the bone cortex like the Allis and Kocher forceps, is helpful to the protection of small long bones (such as clavicles), avoids the harm to the patient, and thus the practicability of the reduction forceps is improved, and the protection of the patient is realized.

The invention discloses a horizontal well reversed-sequence refracturing method and application, and belongs to the technical field of compact conglomerate oil reservoir transformation of petroleum engineering. According to the method, the communication condition of the old joint and the stratum is judged through trial extrusion, and sand plugging treatment is conducted on the old joint of the communicated stratum; the well is washed until the fracturing operation requirement is met, hydraulic sand blasting perforation operation is conducted, and oil sleeve annulus sand fracturing is conducted to form a new fracturing crack; and the oil sleeve annulus is cleaned, the relation between the sand discharging amount and the liquid amount is calculated, and a basis is provided for follow-up construction till fracturing operation of all workshop sections is completed. According to the method, the plugging effect is judged through peak-type lifting of construction curve pressure after trial extrusion, plugging is conducted in combination with an artificial sand plugging technology of fine sand and liquid amount control and multiple times of plugging, the plugging rate of the old seam of the horizontal well is increased, a new seam is manufactured through a hydraulic sand blasting perforation reversed-sequence staged fracturing technology, real-time and accurate transformation is achieved, an untransformed section of a remaining oil enrichment area is activated, and the plugging efficiency of the old seam of the horizontal well is improved. And the mining period is prolonged, and the single well EUR is remarkably improved.

The utility model relates to the technical field of medical instruments, in particular to a bearded needle for fixing greater trochanter of femur, which comprises a bearded needle main body, a pointed cone part is formed at one end of the bearded needle main body, a plurality of cable channel pieces are arranged on the bearded needle main body, and a plurality of cable through holes are formed on the cable channel pieces. By means of the arrangement, when a thighbone greater trochanter fracture is subjected to surgical fixation, an operator inserts the pointed cone part into a thighbone greater trochanter fracture block to be fixed, then the hooked needle body is integrally attached to the outer side of a thighbone greater trochanter and the outer side of a femoral shaft, and finally a cable (preferably a titanium cable) commonly used in the orthopedics department penetrates through the cable via hole in the cable channel piece to be fixed to the thighbone greater trochanter fracture block. The fixing device for the femoral lesser trochanter and the femoral shaft respectively bypasses the femoral lesser trochanter and the femoral shaft to bind fracture blocks, so that the femoral lesser trochanter fracture blocks and the femoral shaft are fixed, the fixing device is simple in structure and convenient to use and operate, and the internal fixation stability of the lesser trochanter fracture can be ensured.

The invention discloses a pair of double-angle reduction forceps for tibial plateau fracture, which relates to the technical field of orthopedic surgical instruments, and comprises a first forceps arm and a second forceps arm which are hinged with each other through a pivot shaft; the first handle is fixedly connected to the near end of the first forceps arm; the second handle is fixedly connected to the near end of the second forceps arm; the first angle adjusting and locking mechanism is arranged between the first handle and the second handle and used for adjusting and locking the opening angle between the first clamp arm and the second clamp arm; the first forceps head is rotationally mounted at the far end of the first forceps arm; by means of the angle of the forceps arms and the deflection angle of the forceps heads which can be independently adjusted and locked, a doctor can be accurately matched with the force application face of a fracture block on the premise that the overall low-interference posture of an instrument is kept, and the accuracy and operation efficiency of a reduction operation are improved.

The invention discloses a mandibular condyle process fixing plate assembly and a manufacturing method, the mandibular condyle process fixing plate assembly is arranged on a fracture block and a mandible body, and the mandibular condyle process fixing plate assembly comprises a first fixing plate, a second fixing plate and a third fixing plate, the second fixing plate is respectively connected with the fracture block and the mandible body; the first fixing plate is movably connected with the second fixing plate; the first fixing plate is provided with a first anti-skid part, and the second fixing plate is provided with a second anti-skid part. The fixing device has the advantages that the first fixing plate and the second fixing plate are movably connected, so that the spatial position of a fracture block is accurately positioned and fixed, experience dependence of bare-handed reduction is replaced, accurate operation of reduction through connection in an operation is achieved, and the occurrence rate of complications such as postoperative occlusion disorder and temporomandibular joint dysfunction is reduced. The first fixing plate and the second fixing plate are provided with the first anti-skid part and the second anti-skid part respectively so as to increase bone-plate friction force, and therefore fracture blocks are prevented from shifting.

The utility model provides an implant for fixing a posterior ligament avulsion fracture block, and belongs to the field of medical instruments. Comprising two pressing plates, namely a short pressing plate and a long pressing plate, the short pressing plate and the long pressing plate are connected through a coil, the short pressing plate and the long pressing plate are each provided with a coil hole for the coil to penetrate through, and supporting columns are arranged in the coil holes of the short pressing plate and the long pressing plate respectively. And meanwhile, the pressing plate can slide around supporting columns arranged on the short pressing plate and the long pressing plate. According to the utility model, the contact area between an implant and a bone block can be increased, and a small bone block is fixed together, so that a better long-term effect can be achieved after wound healing in the later period; after a bone block is fixed through the implant, original suture fixation and traditional steel plate screw fixation can be replaced, the contact area of the implant and the bone block is increased, the side effect of cutting caused by stress concentration of the screw and the suture on the local part of the bone block is avoided, and fixation is more reliable.

The utility model provides a bony hammer-shaped finger clamp which comprises a joint bearing assembly and a pressure applying assembly, the pressure applying assembly is rotatably arranged on one side of the upper portion of the joint bearing assembly, the joint bearing assembly is used for placing a finger, and one end of the pressure applying assembly abuts against a fracture block. The device is simple in structure, convenient to manufacture and low in cost. The bone block fixing needle is utilized to pressurize a reset fracture block and maintain normal alignment, so that the operation difficulty can be reduced, the risk that the bone block is broken due to internal fixation is reduced, the success rate of one-time reset fixation is improved, the operation time is shortened, and the dependence on the skill and experience of an operator is reduced; and meanwhile, the soft joint supporting bracket can maintain the straightening position fixation of the distal interphalangeal joint under the condition of not damaging skin soft tissues, so that the joint surface injury caused by the use of a kirschner wire for threading and fixing is avoided, and the later joint function exercise is facilitated.