49 results about "Joint spacer" patented technology

A joint spacer therapeutically maintains separation of bones of a joint. A carriage is slideably retained within the frame and has at least one ramped surface. An actuator screw is threadably engaged with the frame, and rotatably connected to the carriage, to cause the carriage to slideably move within the frame when the actuator screw is rotated. First and second endplates engage the bones of the joint, and each has at least one ramped surface that is mateable with the ramped surface of the carriage, whereby when the carriage is slideably moved by rotation of the actuator screw, the endplates ramped surface slides against the carriage ramped surface to cause the endplates to move along an axis transverse to the longitudinal axis of the frame, to increase the height of the spacer. Piercing elements are connected to the carriage to pierce bone of the joint when the carriage is moved.

A joint spacer for therapeutically maintains separation of bones of a joint. A frame defines a longitudinal axis extending between distal and proximal ends. A carriage is slideably retained within the frame and has at least one ramped surface and a threaded portion. An actuator screw is threadably engaged with the threaded portion, and bears against said frame to cause the carriage to slideably move within the frame when the actuator screw is rotated. A first endplate engages a bone of the joint, and has at least one ramped surface that is mateable with the ramped surface of the carriage.

A joint spacer therapeutically maintains separation of bones of a joint. A carriage is slideably retained within the frame and has at least one ramped surface. An actuator screw is threadably engaged with the frame, and rotatably connected to the carriage, to cause the carriage to slideably move within the frame when the actuator screw is rotated. First and second endplates engage the bones of the joint, and each has at least one ramped surface that is mateable with the ramped surface of the carriage, whereby when the carriage is slideably moved by rotation of the actuator screw, the endplates ramped surface slides against the carriage ramped surface to cause the endplates to move along an axis transverse to the longitudinal axis of the frame, to increase the height of the spacer. Piercing elements are connected to the carriage to pierce bone of the joint when the carriage is moved.

A femoral hip joint spacer including a prosthesis body having a ball head with a sliding surface, a neck, a collar and a stem. A fastening area is arranged on the stem. The femoral hip joint spacer further has a first connector for feeding a medical irrigation liquid into the body, a second connector for draining the irrigation liquid from the body, and an irrigation liquid inlet opening. The first connector is connected in a liquid-conveying manner to the irrigation liquid inlet opening and an irrigation liquid outlet opening. The second connector is connected in a liquid-conveying manner to the irrigation liquid outlet opening, an irrigation liquid discharge opening and an irrigation liquid intake opening. The irrigation liquid discharge opening is connected inside the body to the irrigation liquid inlet opening and the irrigation liquid intake opening is connected inside the body to the irrigation liquid outlet opening.

A swellable, resilient, flexible carpometacarpal (CMC) joint spacer is provided that is made of a swellable fluid absorbing polymeric medium, the spacer being dimensioned and configured to fit into the space between a natural or replacement trapezium and adjacent metacarpal bones and restore separation therebetween. In embodiments, the spacer has a cylindrical shape. In embodiments, the polymeric medium is a hydrogel. In embodiments, the spacer contains an internal reinforcement member. In embodiments, the spacer is delivered to a target site in at least a partially dehydrated state, whereupon it hydrates and expands to create positive pressure against opposing surfaces, thereby causing separation of the joint.

A fluid joint spacer comprising a body having means for receiving a pressurized fluid from an external source and applying that pressurized fluid against a joint element so as to create a flowing fluid bearing within the joint.

A joint spacer has first and second endplates, with each having a bone engaging surface, and at least two cams with an inclined cam surface positioned on an opposite side. First and second slides, each having ramps with an inclined surface are engaged with the cams of the endplate. The first slide has an angled portion at an end, and the second slide has a hinge portion. A threaded shaft has a hinge portion connected to the slide hinge portion, connecting the shaft to the slide, enabling the shaft to pivot. A nut is threaded to the shaft, and can contact and interfere with the angled portion of the first slide to drive the first slide with respect to the second slide. This results in engagement of the cams and ramps to drive the endplates apart to increase the spacer height.

A joint spacer having a body and a series of extensions projecting therefrom is disclosed. A first of the series of extensions may include a curved section for housing a portion of a joint therein (e.g., the intercondylar notch of a knee), and a second and third of the extensions may be configured to abut an opposing portion of the joint. Once inserted, the joint spacer may maintain the spacing between, and the stabilization of, the joint during surgery. A fourth extension may be included with the spacer in which the extension may interact with an insertion-removal instrument. The insertion-removal instrument may include one end having an insertion geometry for use in inserting the spacer into the joint, and an opposing end having a removal geometry for removing the spacer. Related methods for inserting the joint spacer and various alternate joint distraction devices are also disclosed.

The invention relates to composite material frames for spacecrafts such as satellites and the like. The problem to be solved is to provide a method for realizing a light-weight high-accuracy composite material frame, and the high-accuracy requirement on the installation of effective loads is met through processes. The device is characterized by mainly comprising rectangle cross section rod pieces[1], joints [2], joint spacers [3], joint bushing blocks [4] and rod built-in pieces [5] which are made of composite materials, wherein a frame main body consists of a certain number of rectangle cross section rod pieces [1] and joints [2] in the integral structure; the rod built-in pieces [5] are hinged in the rectangle cross section rod pieces [1]; the joint spacers [3] are hinged on the outer surfaces of the joints [2]; and the joint bushing blocks [4] are hinged inside the joints [2]. By the method, the problems of installation and supporting between the effective loads and bodies of the spacecrafts such as the satellites and the like are solved, the installation accuracy of the effective loads is effectively ensured, and the local rigidity requirement on the installation of the effective loads is met simultaneously; and the method has good effects of ensuring the machining stability of the integral structure and improving the applicability and the reliability of the structure.

The invention discloses a hip joint spacer mold comprising an upper mold component and a lower mold component, wherein the upper mold component and the lower mold component are fastened to form a sealed cavity in a form of a semi-hip prosthesis, and the cavity is used for forming a hip joint cement spacer; the lower mold component comprises a base and a fastening system, wherein the fastening system can rotate along an axle department, thus facilitating release of fastening; the upper mold component comprises a mold cavity, a location pin and a groove; through the location pin, the upper mold and the lower mold are rightly combined, and the groove is convenient for opening of the mold. The hip joint spacer mold has the beneficial effects that the upper mold component and the lower mold component can be conveniently combined due to the location pin, so that combination precision is high and surface quality of the spacer is not affected by misplacement of the mold. The hip joint spacer mold, because of the fastening device, does not require a doctor to press the upper and lower molds through hands, and the spacer mold can continuously provide a squeezing capacity and guarantee manufacturing quality of the spacer; the fastening device can rotate along the axle and can easily release fastening, and the design of the groove in the upper mold facilitate the doctor to open the mold and take out the spacer, thus saving operation time.

A method and apparatus for forming a sealed joint between first and second construction surfaces comprises a joint spacer having a first state and a second state. In the first state, the joint spacer has a unitary structure which includes a first component and a second component, wherein in the first state the second component is engaged to the first component. In the second state the second component is disengaged from the first component. The joint spacer also has an adhesive disposed on at least a portion of only the first component, the adhesive configured to adhere to the first construction surface.

A combination tool having utility in tile installation procedures includes a wide blade adapted to remove excess grout and caulk in relatively large quantities, a four-armed cement remover and grout joint spacer, a spherical grout packer and a “V”-shaped grout and caulk profiler adapted to be secured to a hollow handle in varying combinations. In a first embodiment, the wide blade is attached to a first end of the handle and the four-armed cement remover-grout joint spacer and the spherical packer are releasably secured to a second end of the handle. A second embodiment includes the blade at the first end and the “V”-shaped profiler at the second end in lieu of the cement remover and packer. The hollow handle provides a storage compartment for additional packers. The tool may be made of material that floats in water. The handle may also have a non-hollow web construction.

A spacer formed of an intermetallic compound, such as nitinol. The spacer includes at least two segments shaped in opposing arches. The unique properties of the intermetallic compound enable the material to be deformed into a planar, insertable shape when the material is cooled below a transition temperature and returns to the undeformed shape when the material returns to an ambient, operational temperature. An expansion mechanism assembly engages with the spacer to apply an expansion force, extending the spacer longitudinally drawing the spacer into the planar configuration. The expansion mechanism assembly can be used to guide the spacer into the desired position within the patient. The spacer control mechanism assembly is subsequently removed, relieving the expansion force, returning the spacer to the natural un-deformed, arched shape as it returns to body temperature. Retention features can be integrated in the spacer to aid in retaining the spacer in location.

The invention relates to an articulating joint spacer for temporary replacement of a joint, whereby the joint spacer comprises two spacer parts which each comprise one sliding surface on which the spacer parts, in the patient-inserted state, touch against each other in mobile manner and roll off on each other, and the remaining spacer parts are made, at least in part, of a second bone cement that contains at least one water-soluble antibiotic. The invention also relates to a method for producing a two-part articulating joint spacer, in which a sliding surface is formed in both spacer parts from a low-abrasion first bone cement and at least the surfaces of the remaining spacer parts, at least 50% thereof, are formed with a second bone cement that contains at least one water-soluble antibiotic.

A surgically implantable spacer including a primary body, a normal positioning member, and a translative positioning and locking control member. The normal positioning member is slideably assembled to the primary body, wherein the normal positioning member slides in a normal direction. The locking control member is slideably assembled to the normal positioning member. Projections of the locking control member seat in one of a series of positioning notches. The series of positioning notches are arranged in a stair step arrangement. As the locking control member is driven forward, the locking control member is raised by the projection and notch arrangement, thus raising the normal positioning member. This motion increases a span between a bottom surface and a top surface of the surgically implantable spacer.

The invention discloses a water-saving phyllostachys edulis irrigation method. The water-saving phyllostachys edulis irrigation method comprises the following steps that 1, phyllostachys edulis forest land is selected, and horizontal ditches are dug; 2, PVC pipes with the diameter of 6-8 cm are sawed open from the middles and are respectively divided into two parts to establish horizontal water collecting ditches; 3, fixing columns are evenly distributed and arranged on two sides of each horizontal water collecting ditch in the length direction; 4, water collecting containers are arranged at the lower ends of the horizontal water collecting ditches and are covered with plastic films; 5, old phyllostachys edulis different in ground diameter are selected and are felled at the end of February, stump joints spacers are made through, stumps are fully filled with water every 15-30 days according to the weather condition, and water-saving irrigation is conducted on the phyllostachys edulis. The water-saving phyllostachys edulis irrigation method applies a field runoff field rainwater collecting method to establish an efficient and economical anti-drought technology of a water storage system using phyllostachys edulis stumps as cores, and provides sustainable water supply for phyllostachys edulis water-starved for a long time in middle-slope, upper-slope and remote regions so as to reduce the influence on phyllostachys edulis productivity of extreme or continuous drought.

A connection structure includes a thin wall stainless steel pipe in which a swelling portion, a sandwiching portion forming an inclined pressing surface capable of pressing one inclined surface of the swelling portion, a joint spacer forming a first retention portion pinching a first gasket with respect to the swelling portion as well as having a fitting portion fitted to an outer periphery of the end portion of the thin wall stainless steel pipe, and forming a gasket receiving portion in an outer peripheral side thereof, a joint having a second retention portion sandwiching and pressing a second gasket to an inner peripheral side facing the gasket receiving portion.

A femoral hip joint spacer. The spacer has a prosthesis body with a ball head, a neck, a stem and an anchoring sleeve which encloses the stem on a proximal side of the stem with a circumferential fastening area, irrigation liquid inlet and outlet openings in the body surface, at least one irrigation liquid discharge opening on a distal side of the stem and at least one irrigation liquid intake opening on the ball head or on the neck. The discharge opening is connected in a liquid-permeable manner to the inlet opening but not to the outlet opening and the intake opening is connected inside the prothesis body in a liquid-permeable manner to the outlet opening but not to the inlet opening. A cavity open on two sides is formed inside the anchoring sleeve and connects a proximal side to a distal side of the sleeve in a liquid-permeable manner.