58 results about "Acetabular fossa" patented technology

The invention discloses a surgical navigation system, a surgical robot system for acetabulum osteotomy and a control method of the surgical robot system. The surgical navigation system is used for acquiring image data of a hip joint image and establishing a hip joint three-dimensional model based on the image data, thereby obtaining the center position of a sphere where the acetabular fossa is located. The surgical navigation system, the surgical robot system for acetabulum osteotomy and the control method of the surgical robot system can realize automatic search, move to the center of the acetabular fossa, and control an end tool at the end of a mechanical arm system to carry out rotary osteotomy operation on the acetabulum according to a motion instruction sequence, thereby improving theaccuracy of the operation. The stability of osteotomy surgery is improved by surgical operation based on a mechanical arm. The surgery can be stopped at an edge of a safe area, and thus the safety ofthe surgery is ensured. In addition, the rotary osteotomy surgery can be navigated in real time, and thus the convenience of surgery and the experience of a user are improved.

A hip implant assembly including a spherical shaped ball and an elongated stem. An annular defining rim separates the ball from the stem and abuts, in a maximum inserting condition, over an exterior reconditioned surface of the femur and upon inserting the stem within an interior passageway formed within the femur. A cup shaped support seats the ball in a universally articulating permitting fashion via a flexible and resilient ligament which extends from the ball and is received within a recess passageway of the cup. The cup also includes a mounting surface with a central projecting portion which is in turn resistively fitted within an undercut defined recess formed in the ilium bone in communication with a base surface of the reconditioned acetabulum socket. A corresponding installation kit assists the preparation of the femur and ilium bones defining the hip joint, as well as the installation of the implant body into the upper conditioned femur end and the cup shaped and outer socket support to a reconditioned acetabulum defined in the ilium bone.

A reverse hip prosthesis comprising an acetabular cup for implanting in an acetabular socket. The acetabular cup is secured to the acetabular socket of the pelvis using fasteners. The acetabular cup has a stem extending from the center of a concave portion thereof and an acetabular ball is attached to the stem, preferably by means of a Morse taper. A femoral implant is provided with a femoral cup attached to the proximal end thereof. The femoral cup has a stem which can be constructed in a modular fashion with several stem lengths in order to accommodate the various sizing requirements of different patients. After implantation of the acetabular cup and ball and the femoral cup, the members are assembled together so that the femoral cup can articulate on the acetabular ball. The prosthesis of the invention has a wide range of motion and substantially improved tribology. As the femoral cup is articulated, the edge of the femoral cup moves into a space located between the acetabular cup and the acetabular ball and thereby becomes restrained, thus reducing the likelihood of dislocation during extreme ranges of motion.

A hip resurfacing femoral prosthesis has a partial ball component having an outer surface shaped to conform to an acetabular socket and has a mating sleeve component with an internal bore adapted to receive a femoral head. The head has been shaped and dimensioned to engage the bore and is retained by bone ingrowth, an interference fit or by bone cement. The ball component and sleeve axes may be offset to reposition the outer surface.

A hip resurfacing femoral prosthesis has a partial ball component having an outer surface shaped to conform to an acetabular socket and has a mating sleeve component with an internal bore adapted to receive a femoral head. The head has been shaped and dimensioned to engage the bore and is retained by bone ingrowth, an interference fit or by bone cement. The ball component and sleeve axes may be offset to reposition the outer surface.

The invention belongs to the technical field of medical devices and discloses an acetabular prosthesis of an artificial hip joint with a rotational ellipsoid joint interface, which comprises an acetabular outer cup made of a cobalt / chrome / molybdenum alloy and an acetabular liner made of polyethylene. The liner of the acetabular prosthesis comprises a spherical outer surface and a rotational ellipsoid inner surface, wherein the radius of the spherical outer surface, i.e. the outside diameter of the liner, is equal to the subtraction of the thickness of the acetabular outer cup from the radius of the acetabular prosthesis outer cup; the length of the major axis of the rotational ellipsoid inner surface is equal to the subtraction of the thickness of the liner from the outside diameter of the liner; and the length of the minor axis of the rotational ellipsoid inner surface is equal to the multiplication of the length of the major axis by 0.98. A positioning groove and a clamping ring arearranged between the liner and the outer cup to achieve the effect of fixation. According to the shapes of acetabular fossa of different patients, the acetabular prostheses of different specifications are designed and manufactured so as to solve the problem of stress concentration on the joint interface of the spherical artificial hip joint in the prior art and meet the needs for individual treatment of different patients. Therefore, the acetabular prosthesis provided by the invention is truly put into effect in clinics.

The invention relates to a posterior fixing steel plate for fracture of acetabular anterior and posterior columns. The posterior fixing steel plate comprises a plate body covering the back wall of the acetabular posterior column; the plate body extends downwards to the root of an ischial spine from the upper part close to the top end of a greater sciatic notch along the inner side edge of the acetabular posterior column and then is bent and extends to the lower part of the top end of an ischial tuberosity; an anterior column threaded hole for being connected with a guide sleeve is formed in the end, at the top end of the greater sciatic notch, of the plate body, and the axis of the anterior column threaded hole points to the acetabular anterior column through sclerotin between an acetabular fossa and a square area; a posterior column threaded hole used for being connected with the guide sleeve is formed in the other end of the ischial tuberosity and the axis of the posterior column threaded hole points to the tail end of the ischial tuberosity through sclerotin in the ischial tuberosity; a plurality of fixing screw holes arranged along the plate body are formed between the anterior column threaded hole and the posterior column threaded hole; a limiting hook hooked to the upper part of the greater sciatic notch is arranged on the side edge, which is close to the greater sciatic notch, of the end and corresponding to the anterior column threaded hole, of the plate body.

A hip implant assembly including body exhibiting a substantially spherical shaped ball and an elongated stem. An annular defining rim separates the ball from the stem and abuts, in a maximum inserting condition, an exterior surface of a reconditioned femur upon inserting the stem within an interior passageway associated with the femur. A three dimensional and interior volume defining support secures around the ball in a universally articulating permitting fashion, the support being fixed to a reconditioned acetabulum socket associated with an ilium bone by interconnecting posts and anchors established between the fixed support and the reconditioned surface of the acetabulum. A corresponding installation kit assists the preparation of the femur and ilium bones defining the hip joint, as well as the installation of the implant body into the upper conditioned femur end and the outer socket support to a reconditioned acetabulum defined in the ilium bone.

The invention discloses a novel hip joint prosthesis which is composed of an overhauled acetabular cup. The overhauled acetabular cup is composed of two parts, namely, the micropore structure part and the solid structure part, and the micropore structure part of the overhauled acetabular cup and the acetabular fossa of the human body are in direct contact; the overhauled acetabular cup is of a hemispheric structure, the micropore structure part is arranged on the hemispheric outer surface of the overhauled acetabular cup, the solid structure part is arranged on the inner surface of the overhauled acetabular cup, and three to twelve through holes are formed in the hemispheric structure. The novel hip joint prosthesis has the advantages that the novel hip joint prosthesis can keep the good bone ingrowth pore structure, the strength of a product can also be guaranteed, and cleaning is easy; the micropore structure with the thickness being 1.5 mm is designed on the work surface of the novel hip joint prosthesis, the rest is solid, the thickness of the pore structure is only 1.5 mm, and few challenges are brought to cleaning and disinfection; meanwhile, due to the fact that the thickness of the pore structure is greatly reduced, when screws are implanted, the probability of generating scraps is greatly reduced.

The invention discloses a positioning and navigation system. The positioning and navigation system is used for leading a prosthesis to be implanted into acetabular fossa. The positioning and navigation system comprises a positioning base and a positioner, wherein the positioning base comprises a jointing base and a guide rod, the jointing base cooperates with the acetabular fossa to be jointed tothe acetabular fossa for fixation; the guide rod is fixed to the jointing base and is coaxial with the acetabular fossa; the positioner comprises a sleeve and a guide arm which is formed in a manner that the sleeve extends, the sleeve is suitable for sleeving of the guide rod, and a plurality of guide holes being parallel to the axis of the sleeve are formed in the guide arm; and the guide holes are suitable for positioning needles in a manner of beating in, so that the positioning needles can be beaten into the outer region of the acetabular fossa and are parallel with the axis of the acetabular fossa. The invention further discloses a prosthesis implantation method. The positioning and navigation system can accurately position the milling and softening direction of the acetabular fossa and the implantation position of an acetabular cup, so that during operation, the acetabular cup can be accurately implanted, the acetabular cup can be guaranteed to be implanted to the best position,and the incidence rate of complications of prosthesis dislocation, prosthesis loosening, pain and the like can be reduced.

The invention discloses a filing guide plate for a total hip replacement surgery. The filing guide plate comprises a nested guide plate for 3D (three-dimensional) printing according to a three-dimensional model of an acetabular fossa of a patient and the proportion of 1:1, and at least two hollow guide posts are uniformly distributed along the outer side of the edge of an opening of the nested guide plate. After the nested guide plate is fitted with the inner surface of the acetabular fossa, the axes of the hollow guide posts can be parallel to the acetabular axis of the patient. The inventionfurther discloses a manufacture method. A three-dimensional acetabular fossa model is built according to a pelvis CT (computed tomography) image of the patient by three-dimensional reverse modeling software, the acetabular axis is determined in three-dimensional model design software, the three-dimensional model of the filing guide plate is designed, and 3D printing is performed to obtain the filing guide plate. The invention further discloses a use method. Steel nails are screwed into the hollow guide posts, and the filing guide plate is taken down, so that an acetabular file can perform filing along the axis direction of the steel nails. Filing direction positioning precision is improved, filing operation is simplified, and requirements for experience and technical levels of doctors arelowered.

The invention discloses a robot-assisted hip replacement surgery navigation system. The system comprises a surgical scheme loading module, a robot preparation module, a femur registration module and a hip bone registration module and an acetabulum grinding module, wherein the surgical scheme loading module is used for supporting surgical scheme management, surgical scheme preview and surgical scheme fine adjustment; the robot preparation module comprises robot preparation operations such as equipment connection state monitoring, end tool mounting, end tool automatic calibration, connecting rod and tracker mounting and mechanical arm automatic calibration; the femur registration module is used for carrying out femur registration and realizing registration of the point cloud data and the femur of a patient; the hip bone registration module is used for carrying out hip bone registration and realizing registration of the point cloud data and the hip bone of the patient; and the acetabulum grinding module is used for grinding the acetabular fossa according to the preoperative plan. The robot-assisted hip replacement surgery navigation system is easy to operate, the complexity of the surgery is reduced, the surgery time is saved, and the precision of the surgery and the integrating degree of actual surgery operation and a surgery plan are improved.

The invention provides a customized acetabulum guide plate which is assembled on the acetabulum and used for guiding implantation of an acetabular prosthesis. The customized acetabulum guide plate comprises a semi-spherical cup body, two positioning arms which extend from the edge of the cup body in an upward bending mode and are arranged in a spaced mode, an abutting foot protrusively extending from the outer surface of the cup body and a guide portion upwards extending from the bottom of the cup body. The positioning arms are provided with contacting portions which abut against the surrounding portions of the acetabulum, and the abutting foot abuts against the acetabular fossa. The guide portion is provided with a longitudinally-arranged guide hole. When the acetabulum guide plate is assembled on the acetabulum, the axis where the extending direction of the guide hole is located is set through pre-operation planning and coincides with the central axis of the acetabulum. According to the customized acetabulum guide plate, by abutting the contact portions of the positioning arms against the surrounding portions of the acetabulum and abutting the abutting foot against the acetabular fossa, the customized acetabulum guide plate is stably and firmly assembled at the pre-positioned position of the acetabulum, the structure is simple, and operation is convenient.

The invention relates to a modularized manual acetabulum cup which is arranged in an acetabular fossa and used for connecting an artificial thighbone bulb. The modularized manual acetabulum cup comprises a bowl-shaped semicircular acetabulum cup and an extending shell, wherein the acetabulum cup is provided with an outer circumferential surface contacting with the acetabular fossa and an inner circumferential surface connected with the artificial thighbone bulb, and one side edge of the outer circumferential surface protrudes out of the acetabular fossa and is provided with a first connecting part; the extending shell is provided with a second connecting part jointed with the first connecting part; the extending shell is provided with an abutting surface attached to the bone wall near the acetabular fossa, a jointing surface connected to a plane formed by an opening of the acetabulum cup and an outer plane connected with the jointing surface and provided with an angle relative to the jointing surface; and the extending shell is provided with a plurality of positioning holes penetrating through the abutting surface and the outer plane. In the invention, different sizes of extending members are combined to be attached to various acetabulum cups with acetabular fossa shapes, therefore, different sizes of extending shells are produced to meet the requirements on various patients by changing the angle of the jointing surface relative to the abutting surface.

An artificial partial hip joint prosthesis made of organic polymer material comprises a first ball head, a second ball head and a thigh-bone handle, wherein the first ball head is inward concave; the second ball head is arranged inside the first ball head and connected with the thigh-bone handle; and the first ball head is made of polyether-ether-ketone or other derivatives of the polyether-ether-ketone, during the use, the first ball head is placed inside a human body acetabular fossa, the outer surface of the first ball head is matched with a human body artificial cartilage, the inner surface of the first ball head is matched with the second ball head, and double sliding connections are formed between the outer surface of the first ball head and the human body artificial cartilage, as well as between the inner surface of the first ball head and the second ball head through sliding and matching. The inner implant component of the prosthesis provided by the invention is made of a polymer material, and the problems of irritability and toxicity caused by metallic corrosion and metal possibly are reduced; the elastic modulus of a PEEK material of the prosthesis provided by the invention is matched with a natural bone, so that the problem of stressed shielding is reduced; according to the prosthesis provided by the invention, abrasion to the sliding friction surface of the artificial cartilage is lowered; all inner implant components in the prosthesis cannot cause interferences to nuclear magnetic resonance imaging.

The invention provides an acetabulum side guide plate assembly for hip joint replacement and an assembling method of the acetabulum side guide plate assembly. The acetabulum side guide plate assembly for hip joint replacement comprises a fitting guide plate, a supporting rod, a surgical instrument supporting piece and a positioning nail. The fitting guide plate comprises an attaching base, a guide rod and a positioning connecting piece, the attaching base is suitable for being attached and matched with the acetabular fossa of the human body, and the guide rod extends from the top face of the attaching base in the radial direction of the attaching base; the supporting rod is suitable for being matched with the positioning connecting piece for positioning and is suitable for being separated from the positioning connecting piece; and the positioning nail is suitable for fixing the supporting rod to the outer area of an acetabular fossa, the surgical instrument supporting piece is suitable for being fixed to the supporting rod in a matched mode, and the surgical instrument supporting piece is arranged to be capable of being matched with the supporting rod for positioning and detachably connected with the supporting rod. According to the acetabular side guide plate assembly for hip joint replacement and the assembling method of the acetabulum side guide plate assembly, it can be guaranteed that an acetabular cup prosthesis can be accurately placed, the operation precision is improved, the ideal operation effect is achieved, and the occurrence rate of postoperative complications is reduced.

The invention discloses an acetabulum file holding positioner. The acetabulum file holding positioner is used for conducting precise grinding and shaping on a bone defect part above the acetabulum. The acetabulum file holding positioner comprises a thickness adjusting support (2) and an acetabular fossa support (3), wherein the thickness adjusting support (2) is in a columnar shape, the top of thethickness adjusting support (2) is connected with an acetabulum file connecting rod (4), and the thickness adjusting support (2) is used for supporting the acetabulum file connecting rod (4); the acetabular fossa support (3) is fixedly connected with the bottom of the thickness adjusting support (2), in a hemispherical shape, matched with the shape of an acetabulum file (5), arranged on the bottom of the acetabulum file (5), used for supporting the acetabulum file (5) and controls the acetabulum file connecting rod (4) to drive the acetabulum file (5) to rotate around the thickness adjustingsupport (2) on the acetabular fossa support (3). According to the acetabulum file holding positioner, the acetabulum file is positioned by the acetabulum file positioner, the effect that the acetabulum file can conduct precise filing and shaping on the bone defect part above the acetabulum is achieved, and the stability of a prosthesis implanted into the acetabulum of a human body is ensured.

The invention provides an acetabular cup for an artificial hip joint and relates to the field of artificial joints. The acetabular cup comprises a cup body and multiple fixing tooth rings layered on the surface of the cup body, wherein the cup body is provided with a cup top hole at the top of the cup body and a cup opening at the bottom of the cup body; an accommodating cavity is formed in the cup body; the cup top hole and the cup opening are both communicated with the accommodating cavity; each layer of fixing tooth ring comprises multiple fixing teeth surrounding the center line of the cup body and positioned on the same horizontal plane; and each fixing tooth is arranged on the surface of the cup body. Compared with the prior art, in the acetabular cup for an artificial hip joint provided by the invention, the fixing teeth are arranged on the surface of the cup body, and the dimension and angle of the fixing teeth on the surface of the cup body are gradually increased; and therefore, the acetabular cup is always kept in press fit with the acetabular fossa, and good initial fixation and long-term fixation of the acetabular cup in the acetabular fossa are realized.

The invention provides an acetabular cup and an artificial hip joint. The acetabular cup comprises a hemispherical body and an extension component or a plurality of extension components. The body comprises an acetabular cup opening, and femoral heads can penetrate the acetabular cup opening; the extension components are connected onto the body in an extensible manner and can be extended towards the outer side of the acetabular cup opening. According to the technical scheme, the acetabular cup and the artificial hip joint have the advantages that extension and retraction of the extension components can be adjusted according to the acetabular fossea of the anatomical structures of different patients, the original peripheral portion of the body is in contact with the cancellous bones of the patients, and accordingly excellent bone ingrowth effects can be realized; the extension components which are extended out of the edge of the outer wall of the acetabular cup opening are in contact with the cortical bones at the outer edges of the acetabular fossea of the patients, accordingly, force can be effectively transferred to the cortical bones of the patients, stress generated between the acetabular cup and the cancellous bones can be reduced, the cancellous bones are difficult to collapse, the acetabular cup can be firmly fixed into the acetabular fossea and is excellent in stability, the problems of collapse of the cancellous bones and fixing failures of existing acetabular cups due to excessively high stress can be solved, and the service life of the artificial hip joint can be prolonged.

The invention relates to the technical field of orthopedics and discloses an orthopedic implant. The orthopedic implant is spherical in shape and concave in a region of a bottom surface portion of theorthopedic implant to form an inner concave surface for contacting an acetabular liner or a femoral ball head to form a joint movable friction pair; at least a portion of that bottom region of the external spherical surface of the orthopedic implant extend outwardly to form an extension structure for contacting the human primary bone outside the acetabular fossa aft the orthopedic implant is implanted into the acetabular fossa of the human primary pelvis. In the manner described above, the present invention can improve the biological fixation performance of orthopedic implants.

The invention provides an acetabulum prosthesis. An acetabular cup and a filling structure are arranged in the acetabulum prosthesis, and an articular surface is arranged in a groove of the acetabularcup; and the filling structure is arranged on the acetabular cup, the filling structure is located on the side, away from the articular surface, of the acetabular cup, at least one part of the filling structure is used for filling a defective acetabular fossa to support the acetabular cup, and at least one part of the filling structure is made of absorbable alloy. Due to the fact that the fillingstructure is connected with the acetabular cup, after implantation, the filling structure supports the acetabular cup, dislocation and slippage between the filling structure and the acetabular cup are avoided, and stability is high; and moreover, at least one part of the filling structure is made of the absorbable alloy so that the absorbable alloy can be gradually absorbed by a human body afterlong-term implantation and can be replaced by newly grown bones, thereby realizing bone reconstruction. Therefore, through the technical scheme, the effects of early-stage high-strength filling and supporting and middle-and-long-term bone reconstruction can be achieved.

A patient-specific acetabular guide comprises a cup body, a plurality of alignment arms extending from the cup body and engaging periacetabular areas of a pelvis, and a supporting leg protruding from the cup body and abutting against a portion of an acetabular fossa. Each alignment arm has a fixing hole extending inclinedly therethrough to allow a Kirschner pin to pass through and enter the periacetabluar area of the pelvis for positing and orienting the acetabular guide on a predetermined location of an acetabulum.

The embodiment of the invention discloses an artificial hip joint prosthesis type matching method and system, and the method comprises the steps: carrying out the preprocessing of a hip joint X-ray image, and obtaining a hip joint key point based on a convolutional neural network; calculating the diameter of the femoral head according to the rotation center of a femoral head, an acetabular fossa and acetabular lower edge key points; calculating an eccentric distance according to the rotation center of the femoral head and the central axis; acquiring a distal edge point of the femoral marrow cavity, and calculating a distal diameter; matching an acetabular cup and the placement angle of the acetabular cup through the diameter of the femoral head, and matching a femoral stem through the eccentric distance and the diameter of the far end, so that the hip joint prosthesis shape is matched. A proper artificial hip joint prosthesis model is automatically matched, so that subjective judgment errors of doctors can be reduced, and the revision rate is reduced.

The invention relates to a hip bone registration method for hip replacement surgery, which comprises the following steps: S100, preoperative planning: segmenting and reconstructing a CT (Computed Tomography) image of a patient to obtain a three-dimensional model of a hip joint on the surgery side of the patient, and planning a coarse registration point selection scheme and a fine registration point selection scheme through the three-dimensional model of the hip joint; s200, performing coarse registration in an operation: according to a navigation camera, a reflective array and an operation probe, performing registration on a hip joint entity and a three-dimensional model reconstructed during preoperative planning to obtain a coarse conversion relation between a hip bone reference frame and the three-dimensional model; s300, carrying out precise registration point selection of preoperative planning, and carrying out point cloud registration after collection; and S400, a registration result with higher precision is obtained through a point cloud registration algorithm, and finally precise registration of the hip joint entity and the preoperative three-dimensional model is achieved. According to the method, the problem that a traditional registration method is prone to falling into a local optimal solution when the hip joint entity is registered is solved, the situation that errors generated after the acetabular fossa rotates along the acetabular edge cannot be recognized is avoided, and the robustness and precision of registration of the hip joint entity are improved.

The invention relates to the technical field of medical instruments, in particular to a method, device and equipment for calculating the coverage rate of a three-dimensional acetabular cup prosthesis and a storage medium. According to the method, a collision detection algorithm based on point primitives is introduced into calculation of the three-dimensional acetabular cup coverage rate, so that a doctor can obtain a relatively real acetabular cup coverage rate through a planned operation scheme and a patient CT image before an operation, and the operation scheme planned before the operation can be better evaluated. In the operation, a doctor can adjust the position of the acetabular cup in the acetabular fossa and the forward and abduction angle of placement or replace the model of the acetabular cup, so that the coverage rate of the three-dimensional acetabular cup reaches 70% of the lowest coverage rate which is internationally recognized at present, and the possibility that the acetabular cup falls off after the operation is greatly reduced. In addition, experiments show that compared with the conventional image-based two-dimensional acetabular cup coverage rate, the method can more accurately reflect the implantation condition and stability of the current acetabular cup.

The invention provides an acetabular cup prosthesis, which comprises an inner cup body having an opening, an expansion outer cup arranged on the outer side of the inner cup body in a sleeving mode, wherein the expansion outer cup comprises a connecting ring corresponding to the mouth portion and a plurality of expansion petals arranged at intervals, the first end of each expansion petal is connected with the connecting ring, and the second end of each expansion petal is a free end; and the second ends of the expansion petals are provided with contraction positions which are close to each other to enable the expansion outer cup to be attached to the inner cup body and expansion positions which are far away from each other. According to the technical scheme, the problem that in the prior art, the contact area of the acetabular outer cup prosthesis and the acetabular fossa cannot be adjusted, so that the attaching degree of the acetabular fossa of part of patients and the acetabular outer cup prosthesis is poor can be effectively solved.