132 results about "Condyle" patented technology

A computer implemented method of creating a dental model for use in dental articulation includes providing a first set of digital data corresponding to an upper arch image of at least a portion of an upper dental arch of a patient, providing a second set of digital data corresponding to a lower arch image of at least a portion of a lower dental arch of the patient, and providing hinge axis data representative of the spatial orientation of at least one of the upper and lower dental arches relative to a condylar axis of the patient. A reference hinge axis is created relative to the upper and lower arch images based on the hinge axis data. Further, the method may include bite alignment data for use in aligning the lower and upper arch images. Yet further, the method may include providing data associated with condyle geometry of the patient, so as to provide limitations on the movement of at least the lower arch image when the arch images are displayed. Further, a wobbling technique may be used to determine an occlusal position of the lower and upper dental arches. Various computer implemented methods of dental articulation are also described. For example, such dental articulation methods may include moving at least one of the upper and lower arch images to simulate relative movement of one of the upper and lower dental arches of the patient, may include displaying another image with the upper and lower dental arches of the dental articulation model, and/or may include playing back recorded motion of a patient's mandible using the dental articulation model.

A femoral component of a knee prosthesis has spaced condyle surfaces defining a notch therebetween. The notch defines an elongated cam housing having an anterior cam and a posterior cam at opposite ends of the housing. The tibial component of the knee prosthesis includes a platform and a bearing supported on the platform, the bearing defining bearing surfaces configured to articulate with the condyle surfaces. The tibial component includes a spine projecting superiorly from the bearing that defines an anterior face and a posterior face. The posterior face and the posterior cam define complementary curved surfaces configured for cooperative engagement when the femoral component and the tibial component are at a predetermined flexion angle. The cam housing is configured to form a gap between the posterior cam and the spine when the knee is normally extended. In another feature, the spine includes a stiffening pin extending therethrough.

A patient matched instrument for a patient's femur is disclosed. The instrument includes a body having a cutting slot and a patient matched surface that mates with the patient's trochlear groove, a first leg portion extending from the body, a second leg portion extending from the body; and each leg portion has a contacting pad for tangential contact with the patient's femoral medial and lateral condyles.

The prosthetic temporomandibular implant (10) comprises a concave surface (16) and a convex surface (17) designed to cooperate, respectively, with the natural outer surface (9) of the condyle (5) and the natural inner surface (7) of the fossa (8) of a damaged joint (2) of a human mandible (1). It is made of a rigid biocompatible material such as ceramic, stainless steel or an aluminum/zirconium alloy.

The implant is designed based on an image of the joint (2) generated by a medical imaging system and incorporating an image of a healthy joint (3); these three-dimensional images are processed by a CAD (segmentation, vectorization) system to obtain a vector representation of the implant (10) and a data file capable of controlling a digital milling machine.

The invention is applicable to the restoration of a damaged TMJ (2).

A knee prosthesis includes a femoral component having two condyles and an asymmetrical cam extending between the condyles. The cam has a medial end and a lateral end. The knee prosthesis also includes a tibial component having bearing surfaces and a post disposed between the bearing surfaces. The femoral component and tibial component are engageable by contact between the femoral condyles and tibial bearing surfaces, and by contact between the cam and post. The cam includes a first curvature defined by a first plane passing through the cam, and a second curvature defined by a second plane passing through the cam, the first curvature having a first vertex, and the second curvature having a second vertex, the distance between the first vertex and a medial plane being greater than the distance between the second vertex and the medial plane.

A knee prosthesis comprises a femoral component for securement to a femur, the femoral component defining medial and lateral J-shaped condyles and an intercondylar groove; and a fixed bearing tibial component for securement to a tibia, the tibial component having respective bearing surfaces which are fixed with respect to both a tibial engaging component and a stabilising peg for securing the tibial component to a tibia, the respective bearing surfaces being shaped to engage with said condyles both when the knee, in use, is extended and also over a range of flexion.

The invention provides a method for positioning longitudinal osteotomy position of tibia in unicompartmental knee arthroplasty, an intramedullary positioning rod and a thighbone drilling guide auxiliary device are used for determining the drilling position of a fixing hole used for mounting a thighbone prosthesis on the thighbone, the fixing hole is prepared under the guiding effect of the thighbone drilling guide auxiliary device, the postartis of the thighbone is cut off, the meniscus is cut off, a thighbone test mold with the appropriate thickness of the distal condyle is selected and installed after bone surface primary forming, the knee joint is bent and stretched repeatedly, and the longitudinal osteotomy position of the tibia is determined through the thighbone test mold. By capturing the motion trail of the tibia joint during relative normal motion, reference is provided for longitudinal osteotomy of the tibia platform, so that the longitudinal osteotomy position of the tibia is determined, the rotation alignment of the tibia prosthesis is closer to the motion trail of the tibia joint, collision between the prostheses is avoided, the motion compatibility and coincidence of the thighbone and tibia prostheses are better, the postartis of the thighbone is preferentially cut off, so that the meniscus on the tibial plateau is cut off more easily, and the collateral ligament is prevented from being damaged.

A 3D reproducing method with multi-row for measuring the torsional angle of humerus head includes such steps as using the shoulder joint mode in volume reproducing technique to cut and separate scapula and obtain the reproduced 3D humerus image, drawing a circle to fit the joint surface of humerus head, drawing a line between dots A and B which are cross points between said circle and joint surface, drawing the midnormal line EF or said line AB to obtain the far-end defining line of said torsional angle, drawing a line CD between the most convex dots of internal and external upper condyles to obtain its near-end defining line, and measuring the included angle between lines EF and CD to obtain said torsional angle.

The invention relates to a tibial shim pad for a knee joint. The tibial shim is used in cooperation with a test mode prosthesis and a test condyle prosthesis, and the tibial shim includes a shim basematched with the test mode prosthesis, a shim main body matched with the test condyle prosthesis and a connection mechanism for connecting the shim base and the shim main body, the connection mechanism includes a clamping part for connecting a force line handle, and the clamping part can disconnect from the force line handle after being placed between the test mode prosthesis and the test condyleprosthesis. The assembly and disassembly of the tibial shim can be easily completed with the help of the force line handle, and compared with a manual disassembly and assembly method of an integratedtibial shim in the prior art, the assembly and disassembly method provided by the invention effectively shortens the surgery time; and the tibial shim for the knee joint provided by the application iscomposed of the shim base, the shim main body and the connection mechanism, can realize the mass production of the shim base and the connection mechanism, is beneficial to reducing the preparation costs, effectively reduces the occupied space of the tibial shim during a surgery, and is beneficial to progress of the surgery.

The invention provides a 3D-printing femoral-condyle five-in-one integration osteotomy device and a forming method thereof, and relates to the technical field of medical apparatuses and instruments. For solving the technical problem that errors are easy to generate in existing total knee replacement femoral-condyle osteotomy, the 3D-printing femoral-condyle five-in-one integration osteotomy devicecomprises a femoral osteotomy device model matched with the affected-side femoral condyle of a patient, the femoral osteotomy device model is provided with a femoral-condyle front fitting face, a femoral-medial-condyle fitting face and a femoral-lateral-condyle fitting face, and the femoral-condyle front fitting face is used for fixed with the femoral condyle; the femoral osteotomy device model is subjected to stress and is not front to deformation, and is formed in a 3D-printing mode. Two osteotomy processes can be merged into one process, femoral-condyle osteotomy is completed one time, theusing quantity of osteotomy guiding plates is decreased, and deviations are reduced.

The invention discloses a method for positioning temporomandibular joints based on CBCT. The method comprises the following steps of (1) performing image acquisition; (2) performing image fusion; and(3) performing parameter calculation. The opening and closing images of the temporomandibular joints are fused based on CBCT three-dimensional data, and displacement information of condyles at the temporomandibular joints and angle information of the opening and closing condyles and the horizontal line for diagnosis of doctors are obtained. The opening and closing movement track of a patient is obtained through secondary CBCT irradiation, the rotation center of the condyle process and the condyle guide inclination are determined, and therefore, precise positioning of the temporomandibular joints is achieved.

An orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to contact a spine of the tibial bearing and a condyle surface curved in the sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the posterior cam of the femoral component may include a concave cam surface and a convex cam surface.

The present invention relates to a device for protecting a user's knee joint, the device being for installing on a sports boot (2) and being characterized in that it comprises a shell (10) provided with an inside surface suitable for covering at least in part an anterior portion of the user's leg, the shell (10) having a top portion (11) for situating at knee level and a bottom portion (12) including connection means suitable for connecting the shell (10) to the sports boot (2), the top portion including side cheeks suitable for being put into contact with the knee on either side of the knee, and coming into contact at least with the condyles of the user's femur, at least one strap (3) for attaching around a zone of the leg and attachment means for attaching the strap (3) to the inside surface of the shell (10).

The invention relates to the field of medical instruments, and discloses a tibia platform support and a single-condyle knee joint applying the tibia platform support. The single-condyle knee joint applying the tibia platform support comprises a first platform part, as well as a connecting part which is fixed on a bottom surface of the first platform part; the connecting part comprises at least onefixed column and at least one panel which are arranged, with interval between, on the bottom surface of the first platform part; and the panel has a tapered width from the bottom surface of the firstplatform part to a direction that is away from the bottom surface. The single-condyle knee joint applying the tibia platform support disclosed by the invention is capable of realizing better fixationwith human bone tissue, so that the single-condyle knee joint has improved stability after a single-condyle knee replacement surgery; and thus, normal kinematics of the knee joint can be ensured.

The invention relates to the field of medical instruments, in particular to a knee joint self-locking condyle extraction device. The device comprises a condyle extraction device body and a control assembly used for controlling the condyle extraction device to clamp or loosen a test condyle, wherein the condyle extraction device body comprises a force application rod and two locking claws hinged tothe force application rod; the two locking claws are located on the same side of the force application rod; openings used for clamping the test condyle are formed in the ends, away from the force application rod, of the two locking claws; the control assembly is used for controlling the sizes of the openings of the two locking claws; and the control end of the control assembly is located on the side, away from the locking claws, of the force application rod. The condyle extraction device has the effects that the complexity during condyle extraction can be reduced, and the operation time is shortened.

The present invention discloses a temporal-mandibular joint in-vitro simulation simulator comprises a simulation skull model, a skull fixing device, a three-dimensional space adjusting device, a control device and a transmission device. The control device is used for generating a control signal, the transmission device is used for transmitting power to the three-dimensional space adjusting device, and the three-dimensional space adjusting device is used for adjusting the position, so that the upper jawbone and the lower jawbone in the simulation skull model complete double-side linkage simulation opening and closing movement with the condyle process as the axis; and functional motion of temporomandibular joints can be fully simulated, and joint motion in physiological and various pathological states can be simulated by adjusting joint motion frequency.