32 results about "Posterior fixation" patented technology

The application provides a controllable self-expanding intramedullary nail internal fixation system for long bone fracture, belonging to the technical field of orthopedic medical instruments, and comprising a self-expanding intramedullary nail, a visible controllable self-expanding platform and a locking nail; the self-expanding intramedullary nail comprises a locking hole and an expandable support; the locking hole is arranged at the proximal end of the self-expanding intramedullary nail and is matched with the locking nail to fix the proximal end of the self-expanding intramedullary nail; the expandable support is arranged at the distal end of the self-expanding intramedullary nail after expansion to fix the distal end of the self-expanding intramedullary nail. The visible controllable self-expanding platform is in communication with the expandable support and can display the expansion size, and the self-expanding intramedullary nail can be prevented from being expanded too large to affect the medullary cavity by precalculating the expansion size.

This application describes surgical instruments and implants for building a posterior fixation construct across one or more segments of the spinal column. More specifically, the application describes instruments and methods for building a posterior fixation construct across one or more segments of the spinal column in a minimally invasive fashion.

The present invention relates to a suturing device comprising: a forward-backward movement guide tube to which second and first loops of a preliminary knot part of a suture knot part are sequentially added and installed, and into the rear of which a forward-backward penetration tube part is inserted; a forward-backward tying-guide bracket part onto which the second loop is added and installed; and a suturing needle part which has an end part that extends from the second loop provided therein and which is installed above the forward-backward penetration tube and the forward-backward movement guide tube. The suturing device has a simple configuration, minimizing the manufacturing costs thereof, and the simple configuration has mutual organic operation enabling a suture knot part having a two-stage tying part to be quickly and easily formed in a wound incision part, thereby quickly and easily suturing the wound incision part to reduce the pain of the suturing procedure for a patient. In addition, the suturing device enables easy suturing, including not only surgical suturing of an open portion of a body part during surgery, but also suturing after direct removal or ablation of lesions using an endoscope without opening the inside of the body.

The utility model provides a spinal post-operation fixing and protecting device, which belongs to the technical field of post-operation auxiliary protection, and comprises a protecting belt, the protecting belt is provided with an assembly type protecting plate and rib side supporting plates on the two sides, the assembly type protecting plate comprises a supporting clamping groove and a plurality of groups of protecting clamping plates, and the supporting clamping groove is provided with an opening. Sliding blocks matched with the supporting clamping grooves are arranged on the two sides of the protection clamping plates and used for installing the multiple sets of protection clamping plates, clamping pins are arranged at the bottom ends of the protection clamping plates, and clamping grooves matched with the clamping pins are formed in the top ends of the adjacent protection clamping plates; a fixing clamping plate is arranged at the position, located on the top of the first set of protection clamping plates, of the supporting clamping groove, a plurality of sets of screw holes are formed in the outer wall of the supporting clamping groove, and the fixing clamping plate and the supporting clamping groove are fixedly installed through bolts; the problem that the length of the supporting structure cannot be adjusted according to the actual condition of a patient can be solved.

The invention discloses a joint fixing device for bone joint surgical nursing, and relates to the technical field of bone joint surgical nursing equipment, the joint fixing device comprises a front fixing protector and a rear fixing protector for fixing a lower limb thigh and a lower limb shank; the two movable angle adjusting devices are symmetrically arranged at the butt joint points of the two sides of the front fixing protective tool and the rear fixing protective tool; the movable angle adjusting device comprises a connecting assembly arranged at the butt joint point of the front fixing protection tool and the rear fixing protection tool, and the front fixing protection tool and the rear fixing protection tool are connected through the connecting assembly and rotate by multiple angles with the connecting point as the axis. An angle adjusting assembly is arranged at the side end of the connecting assembly, and a locking assembly is arranged at the side end of the angle adjusting assembly. According to the leg bending training device, the effects that the legs of the patient can be effectively fixed and cannot move, when bending training is needed, the bending angle range is adjusted in real time according to the training process, and operation is convenient and fast are achieved.

This invention discloses a locking device for a plugless posterior thoracolumbar fixation system, comprising an outer tube, a core rod, and an outer sleeve. One end of the core rod has a stud, and the other end has an annular groove on its side. One end of the annular groove has a first step, and the other end has a second step. The core rod also has a clearance hole on its side. A tail block is rotatably connected inside the outer tube, and the tail block has an internal threaded hole. The stud is threaded onto the tail block. The outer tube has a first shaft hole and a second shaft hole on its side. One end of the outer tube has two clamping arms, one end of which has a hook, and the inner side of each clamping arm has a first protrusion. One end of the outer sleeve has a third shaft hole on its side, and the other end of the outer sleeve has clamping plates around its perimeter. One end of each clamping plate has a clamping groove, and the inner side of each clamping plate has a second protrusion. A second handle for up-and-down movement is also included. This invention allows for simultaneous locking and clamping of the pressure rod, greatly simplifying the surgeon's operation and shortening the surgical time.

Title: Device for assisting in the fixation of a surgical implant after its placement. The invention relates to a device for assisting in the fixation of a surgical implant after its placement, wherein the implant (2) is intended to be introduced into a bone cavity, fixed therein by means of at least one screw or similar device by passing through the bone material before reaching said implant (2) and penetrating an orifice (20) in the implant, and then screwed into the bone material. It comprises, in association with implant (2) retention means (31) designed to maintain the implant (2) while it is positioned in said bone cavity, drilling guidance means (42) fixedly connected to the retention means (31) by means of conformable connecting means (40, 41) so that the drilling axis (X) is aligned with said orifice (20). Figure for the abstract: Fig. 1

The utility model discloses a self-adhesive surgical dressing for ears, which comprises a waterproof adhesive layer, a protective page layer is arranged on the adhesive surface of the waterproof adhesive layer, the waterproof adhesive layer comprises a front part and a rear part, a dressing layer is arranged on the adhesive surface of the front part, and the dressing layer is positioned between the waterproof adhesive layer and the protective page layer. The ear dressing device can adapt to the physiological curvature of the ear of a patient, better fit the wound of the ear, adapt to the sizes of the ears of different patients, realize front and back fixation, improve the binding stability, simplify the fixing steps, and effectively save the dressing change time and cost of a doctor. Disposable sterile packaging is adopted, packaging is easy and convenient, one-step dressing change is achieved, and dressing change at home of a patient can be facilitated; the bandage is simple in design, moderate in size and attractive compared with a traditional bandage mode, bandage discomfort of a patient can be relieved, anxiety of the patient to a wound can be relieved, and meanwhile a doctor can conveniently observe the exudation condition of the wound.

The utility model relates to the technical field of medical instruments, in particular to an occipitocervical posterior approach fixing structure and a skull base depression posterior approach resetting assembly. The occipitocervical posterior fixing structure comprises a fixing plate, two reset connecting rods, two first threaded connecting pieces and two second threaded connecting pieces. A first containing groove is formed in the first threaded connecting piece, a first threaded pressing piece is arranged in the first containing groove, a second containing groove is formed in the second threaded connecting piece, and a second threaded pressing piece is arranged in the second containing groove. The reset connecting rod comprises a reset part and a fixing part, the reset part is pressed in the first containing groove through a first threaded pressing piece, the fixing part is pressed in the second containing groove through a second threaded pressing piece, limiting contact faces are formed on the two sides of the fixing part, and the limiting contact faces are in limiting fit with the corresponding side walls of the second containing groove respectively. The occipital neck posterior fixing structure overcomes the defects that an existing occipital neck posterior fixing structure is poor in stability after being fixed, the connecting rod is prone to rotating under interference of external force, and the fixing precision is reduced.

The utility model discloses a wearable thoracic and abdominal postoperative fixing band, which relates to the technical field of postoperative nursing, aims to solve the technical problem that the fixing band is complicated to wear, and comprises a thoracic and abdominal nursing main body, a quilt band penetrating buckle is arranged on the back side of the top of the thoracic and abdominal nursing main body, and elastic cotton parts are arranged on two sides of the thoracic and abdominal nursing main body. A middle adjusting area is arranged in the center of the front side of the thoracic and abdominal nursing body, an adjusting rope penetrates through the middle adjusting area in a crossed mode, an adjusting structure is arranged on the upper half portion of the middle adjusting area, and a detachable lining is bonded to the interior of the front side of the thoracic and abdominal nursing body through a hook-and-loop fastener. And a blood storage structure is arranged in the detachable lining. Through the design of the top quilt belt and the fixed pull buckle belt, and through the matching of the adjusting rope, the adjusting structure and the blood storage structure, the blood storage quilt has the advantages of being convenient to adjust and wear, convenient to adapt to different patients and capable of reducing the lining replacement frequency.

The application provides a snake bone tube and an endoscope. The snake bone tube comprises a front fixing part, a rear fixing part and a plurality of snake bones. The first end of the snake bone is provided with two convex connecting parts. The second end of the snake bone is provided with two concave connecting parts. The convex connecting part comprises a first convex part, a second convex part and a connecting part. The first convex part protrudes from the end surface of the snake bone in the axial direction. The second convex part is connected to the first convex part through the connecting part and protrudes from the first convex part. The concave connecting part comprises a groove and two supporting plate parts. The two supporting plate parts are respectively arranged on the inner walls on the opposite sides of the groove. A clamping groove is arranged between the two supporting plate parts. The convex connecting part of the rear snake bone is movably connected to the concave connecting part of the front snake bone. The first convex part is arranged in the groove and on the supporting plate part. The connecting part is arranged in the clamping groove. The second convex part passes through the clamping groove and is adjacent to the inner wall of the front snake bone. The endoscope comprises the snake bone tube. The application has the advantages of convenient production and assembly and difficulty in disconnection.

The present disclosure provides a transcatheter occluder device (1) for high venosum atrial septal defects (hv-asds). The device (1) comprises at least one connecting wire (2), a left occluder disk (3), and an asymmetrically designed right occluder disk (4). A first occluder form (A) includes a rear fixation lobe (5), an upper fixation lobe (6), and a lower fixation lobe (7), with the connecting wire (2) connected to the left occluder disk (3) and formed to provide a crown shape. A second occluder form (B) includes a first ring stabilizer (8) as a spiral ring and a second stabilizer (9) at the end of the connecting wire (2) for insertion into the superior vena cava and the inferior vena cava. The connecting wire (2) comprises a mesh wire. The device's (1) asymmetrical design allows secure anchoring to the inferior vena cava rim, addressing the unique challenges of high venosum atrial septal defects.

The invention relates to a shoulder joint surgery and rehabilitation device which solves the problems that an existing shoulder arthroscopy surgery traction device is prone to causing displacement of a humerus head, operation is affected, and a postoperative fixing brace is prone to causing ankylosis of joints. Comprising an inflatable air bag, a first U-shaped arc and a second U-shaped arc are arranged on the two sides, opposite in direction, of the inflatable air bag respectively, an armpit supporting part is arranged between the first U-shaped arc and the second U-shaped arc, and the inflatable air bag is further provided with a wearing fixing piece, an inflation inlet and a pressure release valve. During use, the air bag is inflated through the inflation inlet, the first U-shaped arc is attached to the surface of a rib beside the armpit, the wearable fixing piece is used for wearing and fixing, the second U-shaped arc is used for containing the inner side of the upper arm, the armpit supporting part is used for supporting the armpit, the air bag forms a lever fulcrum at the armpit, the humeral head is pried to be away from the shoulder glenoid fossa, and the joint gap is increased; in addition, when the shoulder arthroscope is used after an operation, the joint capsule is relaxed, fixation is relatively relaxed, the range of activity after the operation is obviously enlarged, and early rehabilitation of a patient is facilitated.

The invention discloses an infix distraction device with a strength adjustable function, and relates to the technical field of medical instruments, the infix distraction device comprises a main body, a distraction mechanism, an adjusting mechanism and two locking mechanisms, the distraction mechanism is located on the main body, the adjusting mechanism and the locking mechanisms are located on the distraction mechanism, two connecting sleeves are arranged on one side of the main body, and the two connecting sleeves are arranged on the other side of the main body. Pedicle screws are arranged below the two connecting sleeves, the distraction mechanism is used for adjusting the distance between the two pedicle screws in the pelvis so that the pelvis anterior ring can be expanded, the adjusting mechanism is used for adjusting the angle so that the device can adapt to treatment of different patients, and the locking mechanism is used for fixing the distraction position after the pelvis is distraction so that the stability of the device can be guaranteed. According to the pelvic anterior ring dilation device, the dilation strength is adjusted, the dilation strength can be adjusted according to the actual situation of a patient, the stability and safety in the dilation process can be ensured, and the pelvic anterior ring dilation treatment effect and the rehabilitation quality of the patient are improved.

The utility model belongs to the technical field of medical instruments, and relates to a trunk surgical incision dressing external fixing band which comprises a fixing band body, two guide rail strips and a decompression pad, the two guide rail strips are arranged in parallel with the length direction of the fixing band body and are respectively arranged on one sides of two long edges of the fixing band body, and the decompression pad is arranged on the fixing band body. The two ends of the guide rail strips are correspondingly and fixedly connected with the two ends of the fixing band body respectively, the pressure reduction pad is arranged on the fixing band body, and the two sides of the pressure reduction pad are correspondingly and slidably connected with the two guide rail strips respectively, so that the position of the pressure reduction pad in the length direction of the fixing band body can be adjusted. The position of the pressure reduction pad in the length direction of the fixing band body is adjusted according to the position of an operative incision, after the pressure reduction pad is positioned at the dressing position, the two ends of the fixing band body can both be wound to the portions, convenient to operate, of the body of a patient, and after adjustment, the two ends of the fixing band body cannot be located under the body of the patient; and skin pressure sores caused by uncomfortable end joints are avoided.

The invention discloses a self-adaptive orthopedic external fixation composite material and a preparation method thereof. Comprising a gradient modulus layer, a dynamic buffer layer and a high-expansion layer, according to the self-adaptive orthopaedic external fixation composite material disclosed by the embodiment of the invention, the composite material can be quickly attached to limbs and form mechanical support in gradient transition from outside to inside by utilizing the initial soft state of the material, so that the rigidity required by fracture reduction is ensured, and the stress shielding effect caused by too hard material is effectively reduced, thereby promoting bone healing and improving the bone fracture reduction rate. In the whole rehabilitation period, the limb rehabilitation device can adapt to swelling and regression changes of limbs, tight attachment is always maintained, compression on the skin in the swelling peak period is avoided, instability caused by fixing looseness after detumescence is also prevented, when rehabilitation angle adjustment needs to be conducted, materials can be safely softened through simple cold compress, painless adjustment is achieved, and the rehabilitation effect is good. In the adjusting process, all the layers have a synergistic effect, stress is effectively dispersed, and traction damage to the skin is completely eradicated.

The utility model discloses a kind of absorbable rib fixation nails, made of high molecular absorbable material integrated, including shank part and the clamping portion of both ends of shank part, clamping portion is equipped with bifurcation structure with opening towards non-connection shank part one end, at least one branch outside of bifurcation structure is equipped with inverted tooth structure, inverted tooth structure end is conical or triangular, the width of bifurcation structure is greater than the width of shank part.The utility model can be made into nail body by absorbable material, clamping portion end bifurcation, inverted tooth structure can be fixed after being expanded in marrow cavity and increasing friction, wide conical end is easily placed into marrow cavity and can play anti-rotation, anti-removal effect, fixed firm and not easy to displace, without suture reinforcement to prevent affecting periosteal blood supply and nerve compression, after fracture healing, fixation nail can be degraded and absorbed, without secondary operation removal, after absorption, chest CT, MRI examination has no influence, more promotional, can better improve the user's use experience.

The invention provides a telescopic chest malformation orthosis and a use method. The orthosis comprises an arc-shaped orthosis body and a fixing assembly connected with the arc-shaped orthosis body in a sliding mode. The first end of the orthopedic body is provided with a fixing piece, and a runway-shaped hole structure and a side wall groove are arranged in a thinned area of the head of the second end of the orthopedic body. The transverse sliding assembly of the fixing assembly slides in cooperation with the groove through the protrusion, and the sliding position can be locked through the limiting assembly on the transverse sliding assembly. The length of the orthosis is adjusted through the sliding mechanism, and the growth and development requirements of children are met. The use method comprises the following steps: marking thoracic key points before an operation; fitting and shaping the orthopedic body; implanting through a single incision; penetrating through a sternum posterior gap under the guidance of a thoracoscope; turning the orthopedic main body to lift the sternum; and finally fixing two ends of the orthosis. According to the invention, the beneficial effects of minimally invasive implantation, precise orthopedic and dynamic adaptation are realized.

The utility model relates to the technical field of thoracic surgery postoperative nursing, and discloses a thoracic surgery postoperative fixing device which comprises a fixing plate, a base plate, a first bandage and a second bandage. A plurality of adjusting seats are arranged on the upper portion of the fixing plate, one end of the first bandage is movably arranged in the adjusting seats, and an upper clamping seat is arranged at the other end of the first bandage; the second bandage and the first bandage are arranged correspondingly, one end of the second bandage is fixedly connected with the base plate, and a lower clamping base is arranged at the other end of the second bandage. The upper clamping seat and the lower clamping seat are clamped with each other; one end of the bandage I can flexibly move in the adjusting seat, so that a user can conveniently change the length after the bandage I and the bandage II are combined, and the tightness of the bandage to a human body is adjusted; besides, the first bandage and the second bandage are clamped through the two clamping seats, the clamping mode is simple and convenient, the clamping seats are disassembled and separated in a pressing mode, the disassembling and assembling mode is simple, and therefore the nurse can conveniently disassemble and use the bandage when changing medicine.

A method of single position 360 degree cervical fusion includes positioning a patient in a lateral position on an operating table, orienting and maintaining the patient's spine at a desired sagittal plane alignment, performing anterior cervical disc fusion (ACDF), reorienting and maintaining the patient's head to facilitate posterior approach, and performing posterior fixation. Devices and systems configured to facilitate performing a single-position 360-degree cervical fusion method are also provided.

The invention discloses a U-shaped fixing nail with telescopic teeth, which comprises a crimping main plate, two fixing nail feet which are formed on the crimping main plate and can be inserted into the human skeleton, and a screw rod, and a plurality of movable fixing teeth which protrude towards the outer surfaces of the fixing nail feet under the pushing of the screw rod are formed on the fixing nail feet. The screw is used for pushing the movable fixing teeth arranged on the periphery of the fixing nail foot to spread out of the outer surface of the fixing nail foot, that is, a plurality of fixing teeth extending into the human skeleton are added, so that the contact range of the fixing nail foot and the bone in the skeleton is enlarged; after the movable fixing teeth protrude out of the outer surface of the fixing nail foot, the binding force between the fixing nail foot and the bone is changed from single to multiple, the binding force between the fixing nail foot and the bone is more stable, compared with an existing door-shaped nail, the door-shaped nail is more suitable for being used by a patient with osteoporosis, the situation that the single fixing nail foot is loosened in the osteoporosis bone, and the bone fracture is caused is avoided. And the problem that the fixed nail feet are loosened is solved.

The application relates to the technical field of rib fracture orthotopic fixation, and discloses a rib fracture orthotopic fixation device for thoracic surgery, which comprises a front fixing plate and a rear fixing plate, a strip-shaped box is arranged on the front fixing plate, a plurality of movable sliding blocks are arranged on the two sides of the strip-shaped box, first strip-shaped plates are fixed on the two sides of the strip-shaped box, side fixing plates are fixed on the sliding blocks, second strip-shaped plates are fixed on one side of the sliding blocks, a plurality of equidistantly-distributed miniature damping rods are fixed on the first strip-shaped plates, and a plurality of air bags are arranged on the front fixing plate; in the application, the speed of the side fixing plate is consistent with the speed of thoracic retraction, so that stable reduction is achieved, impact fitting between the side fixing plate and the thorax is avoided, beating is formed, the comfort of the patient is improved, the fixing position of the side fixing plate does not need to be frequently adjusted, automatic alarm can be realized when the patient performs large-amplitude action, and the purpose of automatically monitoring the movement amplitude of the patient can be achieved.

Implementations of the disclosed systems and methods include medical implants, such as spinal implants for posterior fixation. According to some implementations, the implant includes a tulip configured to receive a rod, along with a set screw configured to fix the rod in place within the tulip. In some cases, the set screw is configured to selectively rotate in a first direction to tighten and to selectively counter-rotate in a second direction to loosen. According to some implementations, the implant includes a mechanical stop configured to prevent undesirable counter-rotation of the set screw to thereby resist loosening of the set screw. Other implementations are discussed.

The utility model discloses a protective device convenient for nursing after spine surgery, which relates to the technical field of spine assistance and comprises a rear fixing plate and a detachable plate, one side of the rear fixing plate is fixedly connected with a first side fixing plate, and the other side of the rear fixing plate is fixedly connected with a second side fixing plate. Ventilation grooves are formed in the first side fixing plate and the second side fixing plate, side protection air cushions are fixedly connected to the inner sides of the first side fixing plate and the second side fixing plate, after a spinal operation is conducted on a patient, the patient needs to wear a protection device to protect the spine, and the patient wears the rear fixing plate, the first side fixing plate and the second side fixing plate; a binding belt pasting block of a first side fixing plate is pasted on a pasting base of a second side fixing plate, so that the protection device is fixed to the spine of a patient, the patient can wear the protection device comfortably through side protection air cushions, and when the patient needs to be subjected to dressing change nursing, an adjusting block of a rear fixing plate is pulled, and the adjusting block moves to compress an adjusting spring.

The utility model discloses an adjustable ankle joint injury postoperative fixing brace, relates to the technical field of medical rehabilitation, and solves the problems that an existing device is difficult to accurately adapt to the requirements, the recovery effect is affected by excessive limitation of ankle joint movement of a patient, or secondary injury risk is caused by insufficient limitation, and the recovery effect is affected. And personalized and dynamic rehabilitation support cannot be provided for the patient. The utility model discloses an adjustable ankle joint injury postoperative fixing brace which comprises a bottom plate. The bottom plate adopts a U-shaped plate structure; a connecting plate of an L-shaped plate structure is fixedly arranged on one side of the rear end of the bottom plate, and penetrating type screw hole structures are formed in the outer side of the top of the connecting plate in a semicircular array shape. Two sets of limiting rods are rotationally arranged in screw holes in the top of the connecting plate in a threaded fit mode. The ankle joint is prevented from being injured by improper movement, proper movement is ensured to promote recovery, the limit can be flexibly adjusted according to the progress of each stage of rehabilitation, and the scientificity and accuracy of rehabilitation training are greatly improved.

To provide an orthodontic appliance that can be used for treatment to move the maxillary dentition in the front-rear direction and can reduce the burden on a patient. [Solution] The orthodontic device 1 comprises a one-side posterior fixing portion 2 and an other-side posterior fixing portion 3 configured to be attached to one side and the other side of the maxilla A, respectively, based on the midline palatal suture C, a first adjustment portion 4 that can adjust the distance between the one-side posterior fixing portion 2 and the other-side posterior fixing portion 3, a one-side anterior fixing portion 5 and the other-side anterior fixing portion 6 configured to be attached to one side and the other side of the premaxilla B, respectively, based on the midline palatal suture C, a second adjustment portion 7 that can adjust the distance between the one-side posterior fixing portion 2 and the one-side anterior fixing portion 5, and a third adjustment portion 8 that can adjust the distance between the other-side posterior fixing portion 3 and the other-side anterior fixing portion 6.

The utility model provides a special band for thoracoscopic surgery incision, which comprises a rectangular special band main body and at least two elastic bands arranged on one short edge of the special band main body, the elastic bands are arranged in parallel at equal intervals, and one end, far away from the special band main body, of each elastic band can be fixed on the special band main body after bypassing the trunk of a human body. A groove is further formed in the special belt body, the opening direction of the groove is formed in the side away from the elastic belts, the groove is located in the middle of the distance between every two adjacent elastic belts, and drainage tube fixing devices are further arranged on the two sides of the groove. The thoracoscope surgical incision special belt is used for fixing the chest drainage tube to reduce the motion range, so that the pain of a patient can be relieved, and the drainage tube is prevented from falling off; moreover, pneumothorax caused by falling of the incision dressing can be prevented, and formation of incision hernia can be prevented.

Implementations of the disclosed systems and methods include medical implants, such as spinal implants for posterior fixation. According to some implementations, the implant includes a tulip configured to receive a rod, along with a set screw configured to fix the rod in place within the tulip. In some cases, the set screw is configured to selectively rotate in a first direction to tighten and to selectively counter-rotate in a second direction to loosen. According to some implementations, the implant includes a mechanical stop configured to prevent undesirable counter-rotation of the set screw to thereby resist loosening of the set screw. Other implementations are discussed.

Implant for use in tibial plateau leveling osteotomy (TPLO) surgery, particularly for a dog or cat, wherein the implant (10) is attached to the tibial body, particularly to a medial surface (58) of the tibia (20), and to the tibial head (44) after circular segment-shaped incision and rotation of a caudal fragment (46) by screws (62a, 62b) through screw holes (64a, 64b) extending along a screw hole axis (a, a1, a2, a3) from a medial surface (12) to a lateral surface (14), comprising a proximal head section (24), a cranial section (28) and a caudal process (26).