Abstract: An enossal implant includes a base member, a one-piece spacer member and tening head which has a skeleton structure composed of metal and plastic material. The spacer sleeve has a blind bore with threads in the fastening head portion for receiving a threaded implant post. The skeleton structure has cavities in a metal body filled with an elastic plastic material to enable the spacer sleeve to be compressed in an axial direction and also to bend in response to bending stresses.

Abstract: An artificial tooth root undergoing connective tissue fusion when implanted. The artificial tooth root is columnar-shaped and has a crown (5) at its one end and an apex (6) at its other end. The artificial tooth root has a dual structure consisting of an outer root (7) and an inner root (8). The outer root (7) and the inner rook (8) have axially extending protrusions 4,4' and recesses 3,3' on their lateral sides and are affixed to each other by a resin adhesive (9).

Abstract: A bone-embedded implant fixture is interfaced with an aluminum oxide abutment post through which a variety of different arrangements and types of prosthesis superstructures may be supported, including those having separate coping portions surface bonded to the abutment post. An access bore in the abutment post accomodates threaded insertion of a screw fastener carrying a deformable washer to hold the dental implant assembled and seal the gum tissue region into which the abutment post is fitted.

Abstract: A denture apparatus which includes an upper denture and an opposed lower denture. At least one spring is enclosed and held within a spring enclosure assembly, the spring enclosure assembly attached only to the upper denture. The assembly is adapted to contact the lower denture when the dentures are brought in proximity with each other in order to urge the lower denture away from the upper denture, thereby retaining the dentures in proper position.

Abstract: A prosthesis system for replacing two or more adjacent teeth comprises prefabricated elements for fixing to the lower or upper jaw of a patient. The prefabricated elements include an arcuate bridge base, two or more substantially rotationally symmetric spacer elements, and, for each spacer element, a respective fixture or screw implantable in the jawbone. The system further includes an arcuate dental bridge comprising teeth, and an arcuate profile element supporting the teeth. On its underside the profile element has a groove or channel to receive the bridge base. Each implantable fixture or screw has a screw-threaded bore extending from its outer end for reception of a corresponding screw-threaded shank at one end of the respective spacer element. The bridge base has bores therein to receive fitting portions of the spacer elements and the bridge base is secured to the spacer elements by adhesive and/or by securing screws or nuts.

Abstract: The base for a dental prosthesis includes an outer body of biocompatible metallic material with a cavity in which an inner body of biocompatible metallic material with a seat for holding a prosthesis is disposed with the interposition of a layer of shock-absorbent material. An annular retaining element connected to the edge of the cavity in the outer body has a resiliently-deformable inner edge which engages a corresponding outer collar on the inner body so as to be resiliently preloaded thereby.

Abstract: A dental implant device which effectively and physiologically prevents the penetration of bacteria and other microorganisms and foreign material into the vital implant interface surface with the bone while maintaining resilience and energy absorbing properties which prevent excessive stress on the implant and underlying bone tissue and discomfort to the user. This dental implant device comprises (a) a root structure made of a suitable dental prosthesis material, (b) a resilient boot member surrounding and in contact with the lower portion of the root structure, (c) a biocompatible substantially non-porous sheath member to which bony tissue will readily adhere, enclosing both the resilient boot member and lower portion of the root structure, and (d) a porous sleeve that prevents the penetration of pathogens into the vital implant interface with the bone.

Abstract: Means for fastening artificial teeth in the human jaw comprising an implant which is to be inserted into the jaw and is formed as a closed shell, a secondary portion including a connecting shank and being connectable to said implant, which secondary portion serves as a support for the artificial teeth, and a fastening element for fastening the artificial teeth to said secondary portion, with said connecting shank being held in the blind bore of said implant and at the proximal end comprising at least one slot parallel to the axis for providing a snap and spread connection with a rear cut in said blind bore, with said shank comprising a radially spreadable section which with the aid of a mandrel inserted into said secondary portion via an axial bore can be spread or, respectively, radially held in said implant, and said secondary portion comprising a radial shoulder which is supported by the distal end of said implant as soon as said spreadable section engages said rear cut.

Abstract: A dental implant device which effectively and physiologically prevents the penetration of bacteria and other microorganisms and foreign material into the vital implant interface surface with the bone while maintaining resilience and energy absorbing properties which prevent excessive stress on the implant and underlying bone tissue and discomfort to the user. This dental implant device comprises (a) a root structure made of a suitable dental prosthesis material, (b) a resilient boot member surrounding and in contact with the lower portion of the root structure, (c) a biocompatible substantially non-porous sheath member to which bony tissue will readily adhere, enclosing both the resilient boot member and lower portion of the root structure, and (d) a porous sleeve that prevents the penetration of pathogens into the vital implant interface with the bone.

Abstract: This invention consists of three main parts and a shock-absorbing resilient member. The first main part is a self-drilling implant. The self-drilling implant is tubular in design, having a hollow basket that saves some of the bone granulate from the osteotomy. The bone granulate encourages the formation of a blood clot, helps to immobilize the implant and provides an absorbable substance to precipitate recalcification. The second part is a tissue extension that screws into the implant. The tissue extension has a socket which receives the third element, i.e., the keeper. Two alternative keeper designs, each with its own type of shock-absorbing member, are disclosed. Each keeper embodiment has a bi-frustum principle shape and a longitudinal central shaft. Various dental prosthesis may be attached to the keeper.

Abstract: An intramobile element for dental implants that includes an elastic, flat, circular washer having rounded edges, being 0.75 mm in height and designed to fit neatly on existing abutments and a prosthesis that comprises a gold member to which a porcelain cover is cast. The gold member has a cylindrical head with an internal cradle to precisely support a gold retaining screw with a rounded head and a screw channel spaced from the screw threads to allow for rotation of the prosthesis and making use of existing specific length abutments to control placement of the washer either supragingivally for hygienic reasons or supragingivally for esthetic reasons.

Abstract: An implant (prosthesis) comprises biological material in its surface intended to face the body tissue. The surface is formed of a layer (3) consisting of a mixture of grains (5) of tissue-compatible type and disintegrated tissue-compatible biological material (4).In a method of making the implant, an implant body (2) and a mixture of grains (5) of tissue-compatible type and disintegrated tissue-compatible biological material (4) as well as a nutrient solution (6) for the latter are placed in a mould (8). The biological material is allowed to grow in the mould, both out to the boundary wall of the mould cavity and in to the implant body.

Abstract: A dental implant system comprising a foundation fixture to be embedded in the jaw bone; said system further comprising a hollow transmucosal abutment member supporting a keeper for either a single tooth prosthesis or multiple teeth prostheses. The abutment comprises a plurality of inwardly curved resilient members defining a hollow column extending from a series of external threads which connect, in torus-like fashion, to a hollow pedestal section for the abutment. The internal surfaces of the resilient members have configured protrusions configured to interlock with the keeper. This configuration, in a no-load condition, allows the keeper to rest within the foundation fixture at sufficiently spaced-apart relationship between the keeper and the fixture to maintain a shock-absorbing fluid reservoir. An elastic seal is fitted between the keeper base and the pedestal of the abutment for closure of the reservoir.

Abstract: A coupling for removable dental protheses comprising a male member one end of which is constituted by a fixing member, whereas the other end has the shape of a male coupling member and a female portion comprising a rigid casing fixed into the prothesis which houses a resiliently deformable mass provided with a housing intended to receive the male coupling member of the male portion. This resiliently deformable mass is maintained in the casing by a removable ring clipped on the casing so that the replacement of this mass is effected without any intervention on the prothesis.

Abstract: As known, comfortable, yieldable elastomeric gasket liners are used to couple a prosthetic denture to an individual's natural tooth. The gasket liners are generally affixed to the prosthetic denture by chemical bonding agents. The gasket liners are exposed to shearing and separating forces whenever the prosthetic denture is withdrawn or inserted into position for use. As known, the bonding agents fail to adequately maintain contact between the yieldable elastomeric gasket liners and a prosthetic denture. Repair or replacement of a gasket liner is thereby required, necessitating loss of use and repair. The invention relates to an improved prosthetic denture for mechanically and physically locking a yieldable elastomeric gasket liner to the interior aperture walls of the prosthetic denture. The invention includes a prosthetic denture having grooves which encircle the interior surfaces surrounding an aperture of a prosthetic denture.

Abstract: A method of reinforcing a dental appliance or prosthesis comprising a resin, which includes the steps of applying to a resin portion of the dental appliance or prosthesis a lightweight, woven aramid or extended chain polyethylene fabric, and covering the fabric with more of the resin. Also disclosed are reinforcing materials (preferably a plasma-coated Spectra.TM. fabric), and dental appliances or prostheses reinforced by a lightweight, woven aramid or extended chain polyethylene fabric.

Abstract: A dental implant comprising an artificial root which is embedded in a jaw bone and a post to which an artificial tooth is attached, wherein a stress absorbing member made of a super elastic material is provided in at least a part of the implant between the artificial root and the post. Preferably, a stress absorbing system consisting of a super elastic material member and a polymeric material member is employed.

Abstract: A device for use in attaching artificial teeth to the bone which supports the natural teeth. The device may have an anchoring member comprising a tooth support receiving member, at least one arm extending laterally from the member, means for coupling the arm with the bone and a spike adapted to be lodged into the bone and extending outwardly from the receiving member. In addition to an anchoring member, the device may comprise a tooth support adapted to be removably positioned upon the anchoring member and designed to allow for limited movement of the artificial teeth.

Abstract: A bone-embedded implant fixture is interfaced with an aluminum oxide abutment post through which a variety of different arrangements and types of prosthesis superstructures may be supported, including those having separate coping portions surface bonded to the abutment post. An access bore in the abutment post accomodates threaded insertion of a screw fastener carrying a deformable washer to hold the dental implant assembled and seal the gum tissue region into which the abutment post is fitted.

Abstract: An enossal implant for firmly seating a tooth replacement includes a fastng head on a metal implant post which is threadably secured into a base element, which is either a base body or a metal spacer threaded into the base body. To prevent twisting between the post and the base element, the base element has a recess for receiving an intermediate retaining ring formed of a plastic material which has smooth faces, and the ring is entrapped between a shoulder in the base element and a shoulder on the implant post and interlocking depressions are formed in either the recess and/or the shoulder of the post so that during threading-in of the post, the retaining ring is deformed to fill the recesses to restrain twisting therebetween.

Abstract: A dental support structure for crown restoration which may be screwed into a hollow dental implant. The support structure has a stem which is adapted to receive a crown and which is moveable along the axis of the support structure in resistance to spring pressure and whose axis may tilt without substantial resistance from said spring pressure.

Abstract: A plug connection for the detachable fitting of a prosthesis structure such as a tooth on a tooth peg or post characterized by a plug part provided on the post having a cylindrical base with a tip having a portion of a larger diameter than the base and having a circumferential conical surface extending to a tip, a socket part having a cavity for receiving the plug part and containing a clamping ring for engaging the shoulder formed at the portion and base and supporting a bearing ring in the cavity of an elastic plastic material for relieving impact stresses occurring substantially in a direction of a longitudinal axis of symmetry of the post.

Abstract: A dental implant comprises an elongated body and a supporting ring each with a concave surfaces which cooperate to secure a shock force dampening member so as to simulate natural tooth movement. The components of the implant are tensioned together in the presence and absence of chewing forces to prevent foreign particle invasion between and into the components of the implant. Optionally, an adhesive bonds the elongated body and the supporting ring to the shock force dampening member further preventing foreign particle invasion between and into the components of the implant. The implant is secured to the jaw bone by a socket or the like.

Abstract: An osteointegrated implant comprises a shank formed with external threads at one end receivable in a bone formed in the jawbone; a cap at the opposite end of the shank and formed with an apertured end wall, to which cap a crown, bridge or denture is securable; a threaded pin threadable into the opposite end of the shank through the apertured end wall of the cap and having an enlarged head for removably securing the cap to the shank; and a shock-absorber spring interposed between the cap and the opposite end of the shank to absorb mastication forces applied to the crown, bridge or denture when secured to the cap.

Abstract: A device for retaining a tooth set such as a bridge in the mouth of a patient has an implant with an anchor end received in a drilled cavity in the jaw and provided with longitudinal flutes. On the crown anchor at the opposite end of this implant, a two-part crown can be provided. The primary crown part is connected to the crown carrier by a screw and has an external taper onto which the secondary crown part can be applied with adhesive friction. The secondary crown part is anchored in the artificial tooth set.

Abstract: In a dental implant assembly including a lower section having an implant fixture being disposed in a jaw-bone; the implant fixture having a threaded hole formed therein; a central section having an abutment screw screwed into the threaded hole; and an upper section attached to the abutment screw, an apparatus for resiliently supporting the upper section and sealing the abutment screw against the implant fixture, comprising a cylinder surrounding the abutment screw, and a bushing surrounding the abutment screw between the cylinder and the implant fixture.

Abstract: A stump comprising a central core having a head part and a lower part provided with means for fixing the stump to an implant, and a cap for covering at least a part of the head part, at least one elastic element being arranged at the cap/central core interface. The assembly is arranged so as to permit relative movement between the cap and the central core. Restraining elements are provided to limit the relative vertical movement between the cap and the central core.

Abstract: The coupling device comprises a substantially spherical male element, rigidly associated with a support member, in turn adapted to be rigidly associated with the fixed part of a dental prosthesis. The device further comprises a female element defined by a prefabricated cap having an outwardly open seat. The cap is adapted to be rigidly associated with the removable part of a dental prosthesis, and the spherical male element is engageable, in snap-together engagement relationship, with the outwardly open seat, for associating the removable part of the prosthesis with the fixed part thereof.

Abstract: A dental implant comprising a foundation shaft having a head spaced apart from a supporting ring with a carrier body slidably positioned therebetween is disclosed. The movement of the carrier body is limited to the distance between the head and the supporting ring less the length of the foundation shaft occupied by the carrier body. The second end of the foundation shaft includes a securing means for fixing the dental implant to the jaw bone. An aperture is formed in an elongated body for receiving a resilient force dampening means which maintains contact of the carrier body with the head in the absence of masticatory movement of the jaw and also resists axial movement of the tooth assembly generated by masticatory movement of the jaw thereby cushioning the masticatory forces received by the foundation shaft during use. A connecting means secures the elongated body to the carrier body such that upon the attachement of the artificial tooth to the elongated body-carrier body, a tooth assembly is defined.

Abstract: The dental prosthesis is adapted for insertion into a socket formed within the patient's jaw. It comprises an elongated shaft defining a proximal region, a distal region, and a tip. A soft porous pad extends distally from the shaft tip. The distal region is preferably biocompatible, porous, soft, resilient, deformable, tissue-ingrowth promoting, and has a compressive stress per unit of strain which is substantially smaller than that of adjacent bone.

Abstract: An artifical tooth comprises a contacting member formed of a composite material having compatibility with living tissues and diaposed at an outer portion of the artificial tooth to be contacted with alveolar bone, a metal base member having an opening therein and disposed inside of and attached to the contacting member, a metal post inserted into the opening of the metal base member and at least two elastic buffer members disposed in a space between the metal base member and the metal post. The composite material having compatibility with living tissues contains 40 to 95% by weight of a calcium phosphate compound and 60 to 5% by weight of an organic polymer. Each of the elastic buffer members is spaced apart for movably receiving the metal post by which pressure imposed upon the artificial tooth is transmitted.

Abstract: An assembly for connecting a crown part to an implant in which the jaw of an individual has an implant-connecting member in which a setscrew extends into a pin of the crown-connecting part, the two members having juxtaposed surfaces which are in continuous and all-around sealing adhesive-bonding relationship with an annular disk cushion permitting relative displacement of the crown connector to the implant coupler.

Abstract: The dental implantate comprises a dental insert with a blank hole made therein having an inner thread. An adjuster bolt is mounted in this blank hole which is encompassed by a remote disk resting against the front of the dental insert. On the remote disk is fixed a superstructure that is fastened to the adjuster bolt. The latter has a conical sector which is encircled by a sealing ring. Outside the dental insert protrudes an adjusting bushing and on it is screwed a remote disk on which rests the superstructure. On the bottom of the blank hole in the dental insert is fixed an elastic bushing in which is screwed the adjuster bolt. The dental implantate is useful in orthopedic stomatology and its advantages are expressed in its simplified design and simple operational technics.

Abstract: An implant in which a primary member is secured to the bone and has a recess receiving a secondary member. A screw threaded into a threaded bore of the secondary member drives a compression ring against an O-ring to permit the same radially and axially against the primary member to secure the secondary part to the primary part, seal the two relative to one another and allow a releasable connection.

Abstract: A pair of denture sections have curved front and side portions cooperating to form a U-shape to fit the lower jaw of a person. Front edges of the sections are disposed adjacent each other and between two front teeth and a bottom layer of resilient material is bonded integrally to both sections. A front reinforced portion of resilient material connects the sections together into an integral unit. The resilient connection allows the sections to adjust relative to each other to compensate for distortion of the gums during chewing, and a flexible torsion bar is connected across the front edges in an area through a reinforcing portion of the resilient material whereby to reinforce the connection and yet to allow the adjustable movement of the sections.

Abstract: A cranial motion dental attachment for linking the interproximal walls of adjacent molded crowns while permitting relative movement therebetween. The attachment includes a piston having an integral retainer stem which is attached to a dental structure and a cylinder attached to an adjacent dental structure adapted to receive the piston so that the piston is moveable within the cylinder permitting horizontal or lateral movement between the adjacent dental pieces.

Abstract: A tooth-root implant of high fatigue strength, intended for a two-stage implantation technique, comprises a sleeve (1) which, in its inner region, has retention means (6b), on which a pressure plate (2a) rests loosely. An insertable superstructure bearing (3) is arranged on the pressure plate (2a) and is surrounded, at least partially, by a plastic casing (4). A screw plug (5) is also provided which closes off the upper part of the sleeve (1) in such a way that positive contact is made.

Abstract: A dental prosthetic construction comprising a pontic and a connector limb attached to the pontic, the connector limb having a joint portion received in a socket of an abutment tooth to retain the pontic in an intended position, the joint portion of the connector limb being introduced into the socket in the abutment tooth along a path of insertion which is substantially parallel to the dental arch containing the abutment tooth and having bearing surfaces engaging bearing surfaces in the socket such that there is limited freedom of angular movement of the connector limb about the joint portion so as to permit stress-breaking relative movement between the connector limb and socket while maintaining contact between the connector limb and socket.

Abstract: A resilient denture connecting device for utilization with a male/female attachment means to an abutment tooth, which includes a distally extending shank and a housing sized and configured to nest over the shank and pivot means pivotally interconnecting the shank and housing for swinging movement of the housing relative to the shank and said pin dwelling in a slot which permits of vertical movement of adjustment through a predetermined limited range of movement and the device further includes a biasing means normally urging the housing in a normal untilted position but yieldable vertically and swingably so that the housing is adapted to move vertically and in a distal hinge direction in response to masticating loads and to be reboundingly restored to a normal position by the resilient means.

Abstract: A dental prosthesis having multiple components is provided with flexibility by connecting individual components of the prosthesis with flexible buffer components that are connected to the individual components of the prosthesis through dovetail slots that are located between adjacent components. The flexible buffer components are inserted in the dovetail slots to connect adjacent components of the prosthesis. The connection of tooth crowns and bridge components by the flexible means of the present invention fixes in place the remaining teeth to which the crown or bridge is connected but it preserves the flexibility of the teeth that support the crown or bridge. This contributes to a healthy mouth. The mobility of the dental prosthesis can be adjusted to approximate that of the normal teeth by varying the flexibility of the buffer part or parts.

Abstract: A dental implant comprising an endosteal implant, having a bifurcated core therein, adapted for receiving a prosthetic head. The abutting surfaces of the endosteal implant and the prosthetic head preferably have equal outer diameters. The prosthetic head has a bifurcated shank thereon. The bifurcated core and bifurcated shank cooperate to secure the prosthetic head to the endosteal implant only at an inner segment of the bifurcated core, so as to preserve an annular space between the outer shank segment and the outer portion of the bifurcated core in the area of the alveolar bone. By means of this specialized attachment of the prosthetic head to the endosteal implant, stresses applied to the prosthetic head are translated directly to an inner segment of the endosteal implant, and thus are not applied to the alveolar ridge. Cratering of the alveolar bone is minimized as a result.

Abstract: A connecting device for oral and extra-oral prostheses which is partially implanted in bodily tissue, primarily bone tissue, by means of an anchorage unit (a fixture) that provides more favorable stress and force distribution between the implanted and the outer portion of the prosthesis located peri-tissually. The connecting device includes a cap-shaped matrix (6) whose base is connectable to the anchorage unit by an intermediary spacer (1), and the matrix (6) which includes a resilient portion, for example a separate O-ring member (9) by which the matrix is connected to the prosthesis outer portion (15), preferably through an outer sleeve-shaped patrix (11) so that this will become elastically anchored to the matrix (6).

Abstract: A connecting device is included in oral and extra-oral prostheses of the type which is partially implanted in bodily tissue, primarily bone tissue, by means of a specifically designed anchorage unit (a fixture). The connecting device provides more favorable stress and force distribution between the implanted and the outer portion of the prosthesis located peritissually. The connecting device includes an outer, cylindrical sleeve-shaped patrix (6) for connection to the outer prosthesis portion, for example by casting, and is designed to surround a central spacer screw (3) of a spacer (1) connected to the anchorage unit. The device connects through lower base (11), to a collar-shaped portion (4, 5) of the spacer (1) by the intermediary of a resilient member (7).

Abstract: The specification discloses a removable denture retaining structure in which an elastic mounting member is provided between a denture body and a support base. This structure can obviate all problems of the prior art, i.e. many parts are required, skilled technique is also required to produce, mount and dismount the denture body, and looseness and breakage due to fatigue are apt to occur. Furthermore, the invention is advantageous because the structure can provide patients with comfortable feeling during use.

Abstract: The specification discloses a removable denture retaining structure in which an elastic mounting member is provided between a denture body and an support base.This structure can obviate all problems of the prior art, i.e. many parts are required, skilled technique is also required to produce, mount and dismount the denture body, and looseness and breakage due to fatigue are apt to occur.Furthermore, the invention is advantageous because the structure can provide patients with comfortable feeling during use.

Abstract: A dental implant is disclosed of the type which is fixed to the maxilla of the jaw bone. The implant includes a first elongated body which is externally threaded so that one of its ends can be secured into the maxilla. This body includes an axial bore which extends out of its other end. A second body forming part of the implant includes the artificial tooth at one end and, at the other end, a shaft portion of the first body. The construction permits a certain amount of axial movement between the first and second bodies, once they are fitted together and cushioning is provided between them to simulate the function of a real tooth.

Abstract: The concept of resilient pressure fit is extended to permit ready modification according to the preference of the wearer. In particular, according to the invention, a telescopic connection mechanism includes a vertically disposed male element with a male railway which mates, in a telescopic relation, with a vertically disposed female element having a female guideway, wherein the male element is provided with an insert-receiving recess of predefined size and shape forming a transverse-oriented slot for receiving a selected variety of inserts which lock into the slot. The inserts cannot be removed from the recess slot while the male element is engaged by the female element, but the insert is readily removable from the male element when not engaged by the female element. The recess slot is bordered by wings transverse of the engagement axis of the male element and the female element.An insert is useful for forming a lock to a latch means transverse of and in the female guideway.

Abstract: Mastication force dampening dental implant has a cylindrical casing adapted to be implanted in a jawbone. A resilient insert is mounted in the casing and has a first shaftway. A nut is anchored in the insert coaxially with the first shaftway. A threaded shaft is mounted in the first shaftway, the shaft being threaded into the nut. The shaft has a second shaftway in its top portion. A head is fixedly connected to the first shaft at the top of the casing. A tooth or denture retention post is mounted on the head. The retention post is removably mounted in the top of the second shaftway.

Abstract: An upper structure for an artificial apatite dental root is disclosed. The structure includes inner and outer crowns having a buffer element placed therebetween. The buffer element serves as a satisfactory substitute for the periodontal membrane of a natural tooth.

Abstract: A connector for a dental appliance such as a partial denture, an overdenture or bridge, including a male member, a female member and an element including a body of resilient material mounted by one of the members. The element will be disposed between and in surface-to-surface engagement with the members when they are moved together and engaged telescopically. Mechanical latching structure is provided to latch the element to each member, with the latching structure between the element and the member that supports the dental appliance providing a stronger mechanical latch than that between the element and the member attached to the abutment within the oral cavity.