Abstract: An oxidation and grafting method for grafting a bioactive polymer, such as polyNaSS, onto an article, in particular a polymer or ceramic article. The method comprises a step of oxidation by ozonation and a step of grafting by radical polymerisation in a polymerisation station having a first reactor. The two steps of oxidation and grafting are carried out consecutively in different solutions in the reactor of the polymerisation station.

Abstract: An adhesive composition is provided which is suitable for the bonding of polymeric materials, in whole or in part, such as composite resins, or methacrylate-containing glass-ionomer filling materials, to tooth enamel, or tooth dentin, or to other hand tissues of the human body, such as bone. The composition comprises an unsaturated carboxylic acid ester, an unsaturated phosphate ester and other crosslinking agents. The especially preferred phosphates (which are provided as new compounds) are those of formula (I) in which: R1 is a hydrogen atom, alkyl C1-C4, or CN; R is an aliphatic, cycloaliphatic or aryl radical containing from 1 to 10 carbon atoms and having a valence of n+1; n is an integer from 1 to 5, preferably from 3 to 5.

Abstract: An adhesive composition is provided which is suitable for the bonding of polymeric materials, in whole or in part, such as composite resins, or methacrylate-containing glass-ionomer filling materials, to tooth enamel, or tooth dentin, or to other hand tissues of the human body, such as bone. The composition comprises an unsaturated carboxylic acid ester, an unsaturated phosphate ester and other crosslinking agents. The especially preferred phosphates (which are provided as new compounds) are those of formula (I) in which: R1 is a hydrogen atom, alkyl C1-C4, or CN; R is an aliphatic, cycloaliphatic or aryl radical containing from 1 to 10 carbon atoms and having a valence of n+1; n is an integer from 1 to 5, preferably from 3 to 5.

Abstract: This invention provides a method and material compositions for producing objects containing in whole, or in part, biomedical polymers, especially those having dental use. Microwave sensitive material compositions are injected under pressure into a mold, the mold containing a replica of a body tissue or tissues. While hydraulic pressure is maintained on the material, a microwave source emits metered electromagnetic energy for hardening the material in the 3-dimensionally defined space. For dental and other applications, the mold making, injection and hardening are done sequentially to rapidly produce an object which accurately fits the mold.

Abstract: An adhesive composition is provided which is suitable for the bonding of polymeric materials, in whole or in part, such as composite resins, or methacrylate-containing glass-ionomer filling materials, to tooth enamel, or tooth dentin, or to other hand tissues of the human body, such as bone. The composition comprises an unsaturated carboxylic acid ester, an unsaturated phosphate ester and other crosslinking agents. The especially preferred phosphates (which are provided as new compounds) are those of formula (I) in which: R1 is a hydrogen atom, alkyl C1-C4, or CN; R is an aliphatic, cycloaliphatic or aryl radical containing from 1 to 10 carbon atoms and having a valence of n+1; n is an integer from 1 to 5, preferably from 3 to 5.

Abstract: This invention provides a method and material compositions for producing objects containing in whole, or in part, biomedical polymers, especially those having dental use. Microwave sensitive material compositions are injected under pressure into a mold, the mold containing a replica of a body tissue or tissues. While hydraulic pressure is maintained on the material, a microwave source emits metered electromagnetic energy for hardening the material in the 3-dimensionally defined space. For dental and other applications, the mold making, injection and hardening are done sequentially to rapidly produce an object which accurately fits the mold.

Abstract: Composite materials particularly suitable in the dental art as a tooth filling material including a polymer matrix, a metal, metal alloy, metal oxide particulate, or combinations thereof, in the presence or absence of colloidal silica, and a coupling agent to adhere the particulate to the polymer matrix. Adhesion can also be facilitated by cleaning and/or coating the particulates prior to incorporation into the polymer matrix. One or two paste systems of the composition with suitable initiators, accelerators, etc. can be formulated.

Abstract: The present invention relates to a bone screw cap or stopper, comprising a shank (5) that fits closely to the outer contour of the head (2) of the screw and means (4) for detachably connecting the cap or stopper to the bone screw (1). Especially this stopper comprises an extended shank whose section is at least as large as the largest sectional part of the bone screw, and the length of the extended shank is preferably such that the end of the stopper remote from the bone screw extends to the subcutis.

Abstract: The invention is directed to a biomedical polymer having a number average molecular weight of at least 7.500, said polymer being substantially nonporous and having polymerized therein at least one monomer having at least one covalently bound iodine group.

Abstract: A longitudinal revascularization conduit is formed in the body of an implant. It is blind at the distal end of the body to be implanted in one bone fragment, such as the trochanter, and open via transverse orifices and at the proximal end of the body to be implanted in another bone fragment, such as the femoral head. At least one self-tapping section situated at the distal end of the body immobilizes the body in the bone, or an anchor end-piece is slidably mounted on the body and contains a damping device adapted to push the end-piece in the proximal direction and the body in the distal direction in order to maintain the fracture in compression. The distal end of the body may be mounted in a cylindrical portion of a plate secured on the diaphysis of the femur.

Abstract: An intersomatic cage to be inserted from the posterior approach between two vertebrae comprises two substantially parallel branches for contact with the vertebral bodies, a linking portion linking the posterior ends of the branches, and a movable spreader member for angularly spreading the two branches after insertion of the cage between the two vertebrae. The cage allows adjustment of the lordosis angle between the two vertebrae during surgery. Ancillary equipment for insertion of the cage includes a rasp for forming a housing for the cage between the two vertebrae, a cage-holder for inserting the cage into the housing, a screwdriver for turning a screw screwed into the spreader member to spread the two branches of the cage, and a guide for successively guiding the rasp, the cage-holder with the cage, and subsequently the screwdriver.

Abstract: A consolidation rod and plural members, such as pedicular screws and vertebral claws, have threaded sections extending from a head and fitted with a nut. A rigid fast connection between the rod and a member providing high adhesion is ensured by a fastener for clamping the rod owing to the screwing of the nut. The fastener comprises a first bore sliding on the rod, a slit opening into the first bore and narrowed by nut screwing, and a second bore passing through the slit and passed through by the threaded section. An indented plate, or a bar with threaded ends fitted with hooks transversely stabilizes two consolidation rods. A connector longitudinally stabilizes two consolidation rods.

Abstract: Apparatus is disclosed for feeding animals in at least two stages of development. The apparatus includes animal feeding places arranged in two adjacent, opposing rows which physically isolate one group of animals from a second group of animals. The two rows can be controlled and operated independently of each other, to provide different predetermined amounts of dry feed and water to the feeding places in each of the two rows.A feed supply duct is provided above each of the feeding places. The lower outlet ends of the feed supply ducts have a square cross-sectional area for more efficient delivery of dry feed to the feeding places. Feed is measured and discharged into each of the feeding places in a row by a movable feed pushing plate which pushes a predetermined amount of feed into the feeding places from beneath the lower outlets of the ducts in that row.

Abstract: The filter is particularly for implantation in the interior vena cava by sliding through a small sized catheter of type 7F, so as to arrest the migration of all thrombi of dangerous size. The filter comprises a flexible wire having been subjected to a primitive predeformation into first and second substantially flat superposed loops. The loops are substantially symmetrical respectively with regard to two axes which are substantially orthogonal and convergent at a center of the filter. These loops can be elliptic and inscribed in a square, thus providing four contact points with the venous wall, which are in two-to-two symmetry with regard to the center on the longitudinal axis of the vein, which gives the filter high stability in the vein.

Abstract: The invention relates to a method and an apparatus for feeding a plurality of untethered animals at their respective feeding places in the same enclosure. During each feeding period portions of fodder each not exceeding a few mouthfuls and preferably not substantially exceeding one mouthful are supplied to each feeding place, and the portions are supplied at such time intervals that the rate of fodder supply to the feeding place substantially corresponds to the desired eating rate of each of the animals. Preferably a portion of dry fodder and a corresponding portion of liquid are supplied simultaneously to each feeding place. The portions of fodder are preferably supplied successively to the various feeding places, and the portions may be metered by a rotor arm having a free end extending radially through an annular slot communicating with a fodder reservoir.

Abstract: A plurality of animals, especially swines or hogs, which are able to move freely in the same enclosure, are fed by means of an apparatus supplying fodder at a low rate to a number of separate feeding places (11) corresponding to the number of animals in the enclosure. These feeding places may be formed by a trough (10) in which the respective feeding places are defined by partition walls (12). The bottom of the trough is separated into a supply section (15) and an eating section (16). In order to satisfy the root instinct of the animals and thereby make it possible to reduce the fodder supply rate to the respective feeding places without causing the animals to become impatient so that they tend to change feeding place, the fodder is at least partly supplied to the supply section (15) which is shaped and/or arranged so that it is uncomfortable for the animals to eat the fodder directly from the supply section but more comfortable to root the fodder to the eating section (16) before eating it.