4 results about "Articular fossa" patented technology

A muscle function preservation type total temporomandibular joint prosthesis includes an articular fossa member (1) and an articular head member (2) abutting against the articular fossa member (1). The articular head member (2) includes a mandibular trailing edge fixing plate (21), a sigmoid notch fixing plate (22) and an articular head portion (23). The mandibular trailing edge fixing plate (21) is connected to a bottom end of the articular head portion (23) and extends downwards, and has a plate-shaped structure and includes a mandibular-trailing-edge-surface attaching surface. The sigmoid notch fixing plate (22) protrudes from one side of the mandibular trailing edge fixing plate (21) and extends in a direction away from the mandibular trailing edge fixing plate (21), and has a plate-shaped structure and includes a mandibular-ramus-proximal-sigmoid-notch-portion attaching surface.

The present application belongs to the technical field of spinal surgery implants, and discloses a new lumbar facet joint prosthesis, which comprises a first fixed base and a second fixed base, a central auxiliary support module connecting the first fixed base and the second fixed base, two groups of joint modules, a joint socket and a joint head, the joint head is ellipsoidal, the joint head is arranged in the inner cavity of the joint socket, the joint head and the inner cavity of the joint socket are in clearance fit, a first opening and a second opening are arranged on the joint socket, and the height of the side wall of the joint socket near the central auxiliary support module on one side is higher than that on the opposite side. The two groups of joint modules symmetrically arranged are used for supporting and limiting the two sides of the vertebral body respectively, instead of the arrangement of a single central elastic connecting piece, so that more stable support is provided, and the stability of the prosthesis is improved; through the clearance fit of the ellipsoidal joint head and the joint socket, the two groups of joint modules are dynamically active, the multidimensional movement of the natural facet joint is simulated, and the movement mode of the lumbar vertebrae is more fitted.

Artificial socket (10) for a joint implant, wherein the socket (10) comprises a cup-shaped base body (12) with a rim (20) and a pole (24), and wherein the base body (12) has engagement elements (36) projecting towards the bone on an outer surface (14) facing a bone in the insertion position, wherein the base body (12) is coated at least partially on the outer surface (14) with an osteointegrative coating (56), wherein the engagement elements (36) have a first side surface (48) facing a plane (32) defined by the rim (20), and a second side surface (50) facing the bone, characterized in that the coating (56) on the first side surface (48) is thinner than on the second side surface (50) and / or that the engagement elements (36) are coated at least partially in such a way thatthat the coating (56) extends beyond the coating (56) on the first side surface (48) at its free ends in the direction of a plane (32) defined by the edge (20) and the engagement elements (36) with the coating (56) applied to them form an undercut (58) in a direction transverse to the plane (32).

A new type of artificial sitting, iliofemoral ligament and matching anti-dislocation total hip joint prosthesis, including artificial ligament, acetabular cup, acetabular liner and artificial femoral head, the acetabular liner is sleeved with acetabular cup outside, the acetabular liner is a semispherical shape with a plane surface, the center of the plane surface is provided with an inwardly concave joint cavity, the artificial femoral head is inserted into the joint cavity with interference, constituting a movable structure, a plurality of outward ligament fixing holes are arranged on the periphery of the plane surface of the acetabular cup, a nail channel is arranged on the femoral stem of the artificial femoral head, the ligament sleeve ring of the artificial ligament is fixed in the ligament fixing hole through the fixing device, the tail line of the artificial ligament passes through the nail channel on the femoral stem and is fixed on the femoral stem through the locking nail, constituting an anti-dislocation structure; the present application has the advantages of simple structure, close to human physiological structure, low production cost, easy production and manufacturing, can prevent dislocation, solves the pain caused by prosthesis dislocation to patients and doctors, and has significant social and economic benefits.