11 results about "Mandibular body" patented technology

The invention provides a temporomandibular artificial joint replacement device, a preparation method and a surgical robot system.The temporomandibular artificial joint replacement device is characterized in that a mandibular fixing support is fixedly connected with the outer side face of the mandible of the human body, a temporal bone fixing support is fixedly connected with the outer side face of the temporal bone of the human body, a containing cavity is formed in a glenoid fossa liner, and a spherical joint head is movably arranged in the containing cavity; a base layer, a variable-rigidity elastic buffer layer and a surface layer are sequentially arranged on the inner wall of the containing cavity in the thickness direction of the side wall of the glenoid fossa liner. By means of the temporal-mandibular artificial joint replacement device, efficient simulation of the temporal-mandibular joint replacement device on a real human body temporal-mandibular joint structure can be achieved, the structural strength and the use comfort of the temporal-mandibular artificial joint replacement device are improved, and based on artificial intelligence and a surgical robot auxiliary technology, the device is simple in structure and convenient to use. The preparation function of the temporomandibular artificial joint replacement device matched with the human tissue structure and the automatic assembly surgical operation are achieved.

The application discloses a path planning method for subcutaneous deep layer injection of a mandible, which comprises the following steps: determining a target region of a subcutaneous deep layer which needs to be filled or improved in contour based on three-dimensional anatomical data of a mandible; the subcutaneous deep layer refers to a loose connective tissue gap between a subcutaneous fat layer and an upper periosteum layer; planning a main path which is substantially parallel to a baseline of a lower edge of the mandible or substantially coincides with a preset mandible contour line in the target region; the main path is located in the subcutaneous deep layer; planning a plurality of branch injection paths based on the main path; the starting points of the branch injection paths are distributed at intervals along the main path and extend alternately to the outside of both sides of the main path; and all the paths form a wheat ear-shaped topological structure with the main path as a central axis and the branch injection paths extending to both sides. The method effectively avoids excessive concentration of fillers in any dimension, thereby significantly reducing the swelling degree of local tissues caused by pressure concentration and being beneficial to shortening the recovery time.

The invention relates to the technical field of medical instruments, in particular to a temporal-mandibular joint anterior baffle prosthesis with a porous structure, which comprises a baffle plate, a lateral cranium fixing wing and a zygomatic arch fixing wing which are respectively fixed on a temporal bone scale part and a zygomatic arch, and the bottom of the baffle plate is a cambered surface and is used for fitting and limiting excessive forward movement of a mandibular condyle process. The whole prosthesis is made of a titanium alloy and PEEK composite material, and is provided with a bionic bone tissue porous structure and through holes which are distributed all over the whole, so that the lightweight structure is realized, the bone compatibility is improved, and the osseointegration is promoted. The problems that an existing prosthesis is large in weight, poor in bone compatibility, prone to causing bone degeneration and the like are solved, the prosthesis has the advantages of being light in weight and good in biocompatibility, the comfort and the osseointegration effect are improved, and postoperative discomfort and secondary operation risks of a patient can be effectively reduced.

An assembly (37) for use in ventilating a subject using a laryngeal mask (5) comprises a head-mounted harness (39) and a pusher (41). The harness is arrangeable on the subject's head (H) to support the pusher to press against the subject's (P) floor of the mouth (15). The pusher comprises laterally opposite protrusions to displace, in use and with the harness operatively supported on the subject (P), the subject's soft tissue at the left and right submandibular trigonum relative to the subject's mandible (29) and the subject's surrounding tissue (e.g. submental trigonum) in a cranial direction for pushing the subject's internal soft tissue towards the laryngeal mask in the subject's airway when the laryngeal mask is installed in the subject's airway. Each protrusion or the entire pusher is hollow, providing a recess for accommodating an operator's finger.

The application discloses a model for predicting the risk of temporomandibular joint disorder after mandibular defect repair and a construction method thereof, and belongs to the technical field of medical artificial intelligence and clinical decision support. The method comprises the following steps: multi-dimensional quantitative collection of clinical data, acquisition of preoperative baseline indexes, intraoperative reconstruction structure parameters and postoperative follow-up compensation indexes; screening of key risk indexes and construction of a prediction function, a two-stage feature selection strategy is adopted to construct a nonlinear prediction model; model verification and correction, time stratified cross-validation is performed by adopting a time sequence sample division strategy to ensure the time sequence generalization ability of the model; and prediction tool deployment, the model is packaged as a clinical decision support tool to output individualized risk classification and early warning. Through systematic integration of multi-dimensional risk factors, the application realizes accurate prediction and early warning of the risk of temporomandibular joint disorder after operation, significantly improves the early identification rate and intervention accuracy, and has important clinical transformation value.

The invention discloses a novel coaxial electrostatic spinning stent coupling piezoelectric stimulation and AVT, the morphology of the stent simulates an extracellular matrix, adhesion, growth and differentiation of cells are facilitated, and a space is provided for growth of new blood vessels and new bones; the coaxial electrostatic spinning stent takes an artificial high polymer material as a matrix, is good in biological safety and can be degraded in vivo, and a degradation product is non-toxic; a clinical drug AVT for promoting angiogenesis is loaded in a fiber shell layer, and the defects that various angiogenesis promoting factors are high in price, short in half-life period, insufficient in potential safety and the like are overcome; the piezoelectric material ZnO for promoting osteogenic differentiation is loaded on the fiber core layer, various defects of external electrical stimulation equipment are avoided, the osteogenic differentiation is continuously promoted by collecting masticatory muscle force and converting the masticatory muscle force into piezoelectric stimulation, meanwhile, angiogenesis is promoted in combination with early release of AVT, and finally, vascularized bone regeneration of lower jawbone defects is promoted. According to the invention, the source of required materials is sufficient, the preparation technology is simple, the cost is low, the biological safety is good, and the potential clinical application prospect is achieved.

The application relates to the technical field of medical image processing, and provides a target lesion identification method and system based on medical images, which solves the problems of limited and unstable lesion identification precision. The method comprises the following steps: acquiring a cone beam CT image of a mandible before oral implantation and reference gray data; performing metal artifact reduction and adaptive histogram equalization algorithm enhancement processing with limited contrast to obtain an enhanced image; extracting a three-dimensional gray histogram of an implant target area to calculate gray skewness and gray kurtosis, and extracting a texture feature set; performing principal component analysis on the texture feature set to obtain principal component features, and splicing the principal component features with the gray skewness and the gray kurtosis into a fusion feature vector; analyzing the vector by using a density peak value clustering algorithm, and mapping the result to an anatomical partition, and performing Z-score testing in combination with the reference gray data to identify a bone lesion area. The application can realize accurate and automatic positioning of a lesion.

The utility model relates to the field of jaw joint treatment, in particular to a temporomandibular joint training teaching aid model which comprises a model body, a temporal bone mimicry part, a temporal bone mimicry part, a mandible mimicry part, a joint capsule module detachably mounted on the temporal bone mimicry part and used for simulating a mandible, and a joint capsule module detachably mounted on the mandible mimicry part and used for simulating the mandible. The mimicry mandible is rotatably connected with the joint capsule module through the rotating shaft, so that the mimicry mandible part can rotate relative to the joint capsule module. By arranging the mimic temporal bone part, the mimic mandibular bone part and the joint capsule module, all joints which may be involved in the original temporal-mandibular joint operation process are modularized, and a user can place all the joints on the model body according to own requirements. Meanwhile, the joint capsule module serving as a main object of operation training can be independently replaced after training is completed, other parts do not need to be replaced, and the teaching cost is effectively reduced.

Temporomandibular joint prosthesis (90, 902) comprising a first element (30, 302) attachable to a first side of the mandible (40) and a second element (80, 802) attachable to the first side of the cranium (50), wherein a condylar head (42, 422) is formed at one end of the first element (30, 302), wherein an articular surface (82) is formed on the second element (80, 802) which forms a counter-bearing of the condylar head (42), wherein the condylar head (42, 422) and the articular surface (82, 822) predefine an axis of rotation (A1, A2), wherein the first element (30, 302) and the second element (80, 802) are shaped such that the axis of rotation (A1, A2) is pre-oriented obliquely to a frontal plane (F) of the patient in the implanted state. as well as kit (K) consisting of two such temporomandibular joint prostheses (90, 902).

The invention discloses a mandible advancing device which comprises a mask type support capable of being fixed to the face of a user and a mandible fixator used for fixing the mandible body of the user, and the mandible fixator comprises a mandible body and a mandible support. The lower jaw body is at least arranged behind and in front of the chin bulge of the lower jaw body of a user, the lower jaw support is arranged below the chin bulge of the lower jaw body, and the lower jaw support can be connected with the lower jaw body; the traction component is respectively connected with the mask type bracket and the lower jaw fixer, and is configured with the mask type bracket as a traction point to pull the lower jaw body and / or the lower jaw support; the force of the mandible body acting on the front and back of the mandible body chin augmentation is further adjusted to control the mandible to move forwards and / or the acting force of the mandible support acting on the mandible body chin augmentation is adjusted to control the mandible to move upwards.

This invention discloses a fixation table for zebrafish microsurgery, belonging to the field of biological experimental instrument technology. The fixation table includes a culture device, a silicone fish sleeve, a compression ring, a universal ball joint mechanism, and a connector. The silicone fish sleeve is a hollow, flexible, contoured sleeve with a compression ring at its expanded end. By rotating the compression ring, the flexible wall of the silicone fish sleeve contracts inwards uniformly, wrapping and fixing the zebrafish's body in a non-invasive manner. The locking end of the fish sleeve exposes the fish's head, facilitating surgical operations. The universal ball joint mechanism connects to the compression ring via the connector, enabling rapid adjustment and locking of the fish body at any angle in three-dimensional space, meeting the needs of various surgical positions such as upright, inverted, and lateral placement. This invention solves the problems of easy slippage, uneven pressure, difficulty in body position adjustment, and cumbersome operation in existing zebrafish fixation methods, and is suitable for various delicate microsurgeries such as mandibular bone injuries, intraocular injections, and craniotomy.