37 results about "Articular disc" patented technology

An articular disc prosthesis and method of implanting the same within an intervertebral space between adjacent vertebral bodies. The prosthesis includes a pair of articular components and an articular ball disposed therebetween. Each of the articular components includes an outer shell portion and a removable inner insert portion. The insert portion includes a concave articular surface sized and shaped to receive a portion of the articular ball to provide articulating motion between the articular components. The outer shell portion includes a central hemi-cylindrical portion, a pair of laterally extending flanges, and an axially extending lip. Following removal of the natural intervertebral disc, a pair of hemi-cylindrical recesses are formed along a central region of the adjacent vertebral bodies to a predetermined depth. The prosthesis is implanted within the prepared disc space by axially displacing the hemi-cylindrical central portions of the articular components along the hemi-cylindrical recesses in the vertebral bodies. The lateral flanges and the axial lip of the articular components bear against the endplates of the adjacent vertebral bodies to stabilize the prosthesis and to prevent subsidence.

The invention discloses a manufacturing method of a biteplate for treating temporal-mandibular joint disc displacement by 3D printing. The manufacturing method comprises the following steps: (1) mandible condyle process positions of patients are recorded and fixed; (2) craniomaxillofacial surfaces of the patients are shot to obtain conical beam CT data of the patients; (3) upper and lower jawboneparts of the patients are rebuilt; and the head positions of the patients are adjusted according to frankfort planes of the patients; (4) bone tissue CT values, teeth and occlusalf surface areas are selected from three-dimensional drawing software for three-dimensional rebuilding of occulsalf surface data of the patients; (5) occulsalf surface three-dimensional models of the patients are rebuilt in the three-dimensional drawing software; (6) interference parts of the occulsalf surface three-dimensional models are removed; (7) the occulsalf surface three-dimensional models are guided into 3D printer mated software; (8) upper jaw parts and lower jaw parts of occlusal pads are designed; and (9) a 3D printer is used for printing to finish manufacturing of the occlusal pads. Through projectionsformed on the inner side of the biteplate, lower teeth cannot retreat due to stop by lower jaw projections of the biteplate, so that the lower jaws of the patients are maintained in a protraction state to treat the temporal-mandibular joint disc recoverable forward displacement.

The present invention provides a personalized lower jawbone biomechanics model stress measurement system. The system comprises a measurement pedestal, a muscle strength equivalent structure, the fixing device of the muscle strength equivalent structure, an articular disc fixing device, a loading platform and a strain gage. The fixing device of the muscle strength equivalent structure, the articular disc fixing device and the loading platform are installed on the measurement pedestal, the personalized lower jawbone biomechanics model includes a lower jawbone and two temporal-mandibular joint discs, the lower jawbone is provided with the spring hanger of the upper jaw muscle group, the strain gage is pasted at the measurement region of the lower jawbone, the two temporal-mandibular joint discs are fixed in the articular disc fixing device, two condyles on the lower jawbone model are arranged in the articular disc, the teeth for bearing the bite force in the lower jawbone model is contacted with the motion end of the loading platform, the lower end of the muscle strength equivalent structure is connected with the spring hanger, and the upper end of the muscle strength equivalent structure is connected with the fixing device of the muscle strength equivalent structure. The personalized lower jawbone biomechanics model stress measurement system can express the patient's real condition and has good measurement accuracy.

A prosthetic device for lateral insertion into an intervertebral space is provided. The prosthetic device includes a first component having a first laterally-extending flange for engaging a first vertebra from a lateral approach to the first vertebra, the first component having a first articular surface. The prosthetic device further includes a second component having a second laterally-extending flange for engaging a second vertebra from a lateral approach to the second vertebra, the second component having a second articular surface for cooperating with the first articular surface to permit articulating motion between the first and second components.

The invention provides a customized temporomandibular joint repositioning occlusal pad and manufacturing and application methods. The manufacturing method comprises the following steps: according to malocclusion conditions, determining the correction position of the lower jaw of a patient through the following three methods: muscle de-programming, forward stretching of the lower jaw to disappearance of springing of open and closed joints, and restoration of an articular disc, and acquiring upper and lower dentition data of the patient. The customized temporomandibular joint repositioning occlusal pad is manufactured on the basis of the correction position of the lower jaw and upper and lower dentition data and comprises an integrally formed occlusal pad body, and an upper tooth socket and a lower tooth socket are formed between a lip side wrapping surface and a tongue side wrapping surface of the occlusal pad body. The upper tooth socket and the lower tooth socket are respectively arranged on the upper side and the lower side of the occlusal pad body, a tongue side inclined surface is arranged below the tongue side wrapping surface, and the occlusal pad is particularly used for occlusal treatment of temporomandibular joint disorder caused by malocclusion and temporomandibular joint relocation after joint disc reduction.

The invention discloses a mouse which corresponds with the principle of human engineering. The side face of the mouse is provided with a third finger button and a thumb button which have the same functions with the left button and the right button of a mouse and using can be switched through an electric circuit, thus reducing the service rate of the first finger and the middle finger and also reducing the rate and degree of muscle tendon injury; a function protective pad of the mouse is added so as to hold the function position of an articular disc and decrease the wrist injury as much as possible.

The invention provides a temporal-mandibular joint motion reconstruction method based on multi-modal information fusion. The temporal-mandibular joint motion reconstruction method is characterized by comprising the following steps: making an upper and lower jaw marking device; acquiring and processing mandibular movement data; acquiring and processing CBCT data images; fusing the mandibular movement data and the CBCT image data; a multi-jaw-position biteplate is manufactured; acquiring and processing an MRI data image; the mandibular movement data, CBCT image data and MRI image data are registered and fused, and mandibular movement is visually reproduced in a 3D model and image mode. According to the method, the ternary relative motion relation and the space posture of the temporomandibular glenoid fossa, the joint disc and the condyle process are accurately recorded, the real functional motion state of the temporomandibular joint is revealed in a visual and quantitative mode, and the method can be used for clinical research of the temporomandibular joint, serves as an auxiliary means for diagnosis, treatment and prognosis evaluation of temporomandibular joint diseases and has a good application prospect. Clinical operation is easy and convenient, the difficulty that a clinician judges the position of the joint disc can be lowered, and the accuracy of diagnosis and treatment of temporomandibular joint diseases is improved.

The invention relates to an animal model for showing rabbit temporomandibular joint intracapsular synechia. The animal model can be built according to the following method that the articular disc of a white rabbit generally anaesthetized is drawn forward by a rubber band to be transferred, then nuclear magnetic resonance and endoscope are used to check if the model is successfully built up. The invention also provides a building method for the rabbit temporomandibular joint intracapsular synechia. The invention can provide a reliable animal model for the research of the forming mechanisms of temporomandibular joint intracapsular synechia and temporomandibular joint osteoarthropathy and also for the medicine research for preventing and curing the temporomandibular joint intracapsular synechia and the temporomandibular joint osteoarthropathy.

The invention discloses a temporomandibular arthroscope lower suture needle which comprises a needle body. A needle tube is arranged at the top end of the needle body, and a syringe needle is arranged at the top end of the needle tube; one end of the needle body is provided with a holding part, and the end, away from the syringe needle, of the needle tube is inserted into one side of the middle of the holding part; an inner hole of the needle tube is connected with an inner hole of the holding part, and a reticulate pattern knurling is arranged on the surface of the holding part. The suture needle has the advantages that the suture needle is applied to a temporomandibular arthroscope disc reduction operation, and can be matched with a puncture suture needle, a suture line is guided to penetrate through an articular disc and is fixed below the cartilage of the external auditory canal, and therefore reduction of the articular disc is achieved.

The invention discloses a method and device for directly measuring articular surface pressure in real time, the device is composed of a flexible pressure sensor, a signal acquisition device and a signal output device, the flexible pressure sensor converts a pressure signal in a joint into an electric signal, and then the signal acquisition device and the signal output device are used for respectively acquiring and outputting electric signal data. By utilizing the characteristic that the sensor arranged in the joint can convert a pressure signal into an electric signal which can be output under a pressure condition, accurate measurement and real-time monitoring of the pressure change of the joint surface are realized. The device is suitable for various disease models, such as joint disc displacement, joint disc perforation, anterior cruciate ligament fracture, degenerative joint diseases and the like.

The invention discloses a temporomandibular joint dynamic nuclear magnetic resonance examination device. The temporomandibular joint dynamic nuclear magnetic resonance examination device comprises an upper tooth socket and a lower tooth socket, a fixed shaft is fixedly connected with the outer side of the upper tooth socket, a rotating sleeve rotatably sleeves the outer side of the fixed shaft, a supporting rod is fixedly connected with the outer side of the rotating sleeve, a connecting shaft is fixedly connected with the bottom of the supporting rod, and a connecting plate rotatably sleeves the connecting shaft; and a sliding block is fixedly connected to the bottom of the connecting plate, a clamping strip is fixedly connected with the outer side of the sliding block, the part is used for dynamic magnetic resonance examination whether the positions of glenoid fossa, articular disc and condyle process are abnormal or not in the opening and closing process, in the process, a patient is helped to uniformly open and close the mouth, and good support is brought to clinical diagnosis.

The invention discloses a skull three-dimensional model with temporomandibular joint discs, and relates to the technical field of medical treatment, the skull three-dimensional model comprises a skull component model and a mandibular body model, two groups of guide discs are symmetrically arranged at the bottom of a joint fossa, and screws and first upper rotating shafts are jointly connected between the skull component model and each group of guide discs; when the skull composition model and the mandibular body model are subjected to mouth opening and mouth closing motions, under the action of the bearing, when the mandibular body model rotates anticlockwise around the first connecting rod, the mandibular body model embodies the mouth opening motion; when the mandible body model rotates clockwise around the first connecting rod, the lower jawbone achieves closed movement, and when the lower jawbone model moves forwards and backwards, the joint disc slides along with movement of the condylar process. The two sets of fastening bolts slide forwards in an arc shape along the interior of the guide sliding groove, and the motion trail of the temporomandibular joint can be displayed.

A construction method of a condylar bone resorption animal model for temporomandibular joint osteoarthritis comprises the following steps: completely moving an articular disc forward to the front of a condylar process, then fixing, simulating the most common clinical temporomandibular joint osteoarthritis accompanied with the displacement of the articular disc, observing the pathological change of the condylar bone resorption at the early stage after the displacement of the articular disc, and establishing a condylar bone resorption animal model. The occurrence time, histological performance and molecular mechanism of the early TMJOA are focused on, and a new thought is provided for early prevention and treatment of the TMJOA.

The present invention discloses a knee fixing support. The knee fixing support comprises a joint disc, a first fixing plate, a second fixing plate and a clamping assembly, the inner side face of the first fixing plate is an arc face matched with the thigh and provided with a first supporting strip, the inner side face of the second fixing plate is an arc face matched with the shank and provided with a second supporting strip, the first fixing plate and the second fixing plate are each provided with a plurality of bandage assemblies. The joint disc comprises a first connecting disc, a second connecting disc and a fixing disc, the first fixing plate is connected to one side of the first connecting disc, the second fixing plate is connected to one side of the second connecting disc, the second connecting disc is provided with a connecting shaft which penetrates through the first connecting disc and then is connected with the fixing disc, the fixing disc is in threaded connection with the connecting shaft, and a plurality of adjusting tooth grooves are evenly formed in the contact face of the first connecting disc and the second connecting disc along the axis of the connecting shaft. The clamping assembly comprises a connecting block, a connecting rod and a clamping device. The bandage assembly comprises a fixing band and a fixing seat.

The invention provides a digital orthodontic method for Angle III malocclusion, which comprises the following steps: firstly, preparing a repositioning tooth jaw pad capable of treating the temporomandibular joint disorder of a patient, correcting the temporomandibular joint disorder in a manner of enabling the Angle III malocclusion patient to wear the repositioning pad, improving the symptoms of pain, limited mouth opening and the like, and improving the orthodontic effect of the Angle III malocclusion. The effect of the temporomandibular joint after the joint disc is restored is maintained; after the temporomandibular joint disorder of a patient is treated and stabilized, orthodontic correction is performed in a three-point jaw fixing sectional manner on the basis of the repositioning pad.

The invention discloses a biomechanics-based digital diagnosis method and system for bony class III malocclusion, and relates to the technical field of medical technologies and instruments, in particular to a biomechanics-based digital diagnosis method and system for bony class III malocclusion, comprising the following steps: S1, head shadow measurement and preliminary diagnosis; s2, selecting and scanning a case; s3, carrying out three-dimensional modeling; s4, judging a treatment direction, and performing virtual treatment; and S5, treating the patient according to the analysis. Through biomechanical analysis on the temporomandibular joint in the treatment process of a bony class III malocclusion patient, the problems of condylar process absorption, joint disc displacement and perforation caused by overlarge pressure and shearing force during mandibular movement are effectively avoided; the invention also provides a novel digital diagnosis method for osteogenic III-type malocclusion in combination with head shadow measurement parameters and biomechanics.

The invention discloses a knee fixing brace, and relates to the technical field of knee joint fixation. The knee fixing brace is characterized in that the knee fixing brace comprises two fixing plates which are respectively connected with the thigh and shank of a human body, and a joint disc arranged between the two fixing plates; the joint disc comprises an outer disc body, a free disc body coaxial with the outer disc body, a fixed ring fixed to the outer disc body and coaxial with the outer disc body, two adjusting discs capable of rotating around the axis of the outer disc body, two blocking parts arranged on the two adjusting discs respectively, two clamping teeth respectively arranged on the two blocking parts and two elastic pieces respectively arranged on the two adjusting discs; the clamping teeth can be clamped into the tooth grooves, and the two sides of the fixing plates connected to the free disc body are blocked through the two blocking parts, so that the positions of the two fixing plates can be fixed, and the two fixing plates can be allowed to rotate within a limited range during rehabilitation treatment.

The invention discloses a quantitative measurement and analysis system for temporal-mandibular joints on a magnetic resonance image. The system comprises the following steps: step 1, taking a condyle process maximum cross-section image in an MRI image as a measurement object, describing condyle process and mandibular ramus forms, selecting a most prominent point of the condyle process backwards and a most prominent point of the mandibular ramus backwards at the rear edge of the mandibular ramus, and connecting the two points to form a mandibular ramus trailing edge tangent line, namely a vertical reference line; and step 2, making a straight line perpendicular to the tangent line of the rear edge of the mandibular ramus to be tangent to the B-shaped incisura of the mandible, and determining a horizontal reference line. The system has the advantages that: a stable TMJ MRI measurement system can be established, the condylar process height can be effectively evaluated, comparison before and after treatment is carried out, and the treatment effect is evaluated; and the severity of the TMJ organic lesion can be evaluated by comprehensively evaluating the discoid-condylar distance, the joint discoid length and the condylar process height, so that formulation of a treatment scheme is guided, and the treatment effect is predicted.

The invention provides a preparation method of a bionic artificial temporomandibular joint disc, which comprises the following steps: collecting a temporomandibular joint disc of a pig, performing cleaning, and coarsening pores to obtain a sample I; placing the sample I in the mixed solution, then carrying out centrifuging and freeze-drying, and collecting a temporomandibular joint disc to obtaina sample II; soaking and stirring the sample II with a lauryl sodium sulfate solution and DNA enzyme to obtain an acellular temporomandibular joint disc; blending glycosaminoglycan and protein with polycaprolactone, polyvinyl alcohol, methacryloyl gelatin and P respectively, then subjecting the mixture and the acellular temporomandibular joint disc to perfusion, and obtaining the bionic artificialtemporomandibular joint disc. Immunogenicity of an original animal articular disc is removed through a decellularization method, and the problems that in the prior art, physiological loads of temporomandibular joints cannot be matched, stability is poor, and reconstruction is difficult are effectively solved.

The invention provides a bionic artificial temporomandibular joint disc and a preparation method thereof. The preparation method includes the following steps that the intervertebral disc of oxtail iscollected, washed and then freeze-thawed, glycosaminoglycan and protein are extracted, then the treated intervertebral disc is broken into a flocculent shape, sodium lauryl sulfate and DNA enzyme areadded to treat at room temperature, and washing is carried out to obtain an intervertebral disc flocculent-shaped sample; the intervertebral disc flocculent-shaped sample is freeze-dried, then a digestion solution is added, blending is carried out, a pH value is adjusted to neutral, and then glycosaminoglycan and protein are added again to obtain bio-ink; and a polymer material and the bio-ink areblended at room temperature for 3D printing to obtain the bionic artificial temporomandibular joint disc. The bionic artificial temporomandibular joint disc is prepared by the preparation method. Decellularized intervertebral disc is used to prepare the bio-ink, with the help of by the polymer material, a 3D printing method is used to to reconstruct the temporomandibular joint disc, and the problems that the inability to match the physiological load, reconstruction difficulty and high cost of a temporomandibular joint in the prior art are effectively solved.