Abstract: A device for detaching a tooth root. The device comprises: a lead screw having a threaded point for screwing into the tooth root, and a threaded shaft; a pivoting member including a bore through which the lead screw passes, the lead screw being retractable through the bore by rotational engagement of a threaded member with the threaded shaft of the lead screw; and a platform for supporting the pivoting member such that the lead screw is able to pivot relative to the platform, The lead screw includes a locking surface for preventing rotation of the lead screw during rotational engagement of the threaded member with the threaded shaft.

Abstract: The present invention is an artificial tooth with a device for attaching it to a patient's real tooth, in a position next to the real tooth. The device allows for attachment without the installation of any device in the patient's real tooth. Rather, only a dimple is drilled into the patient's tooth for accepting the device. In one embodiment there is a device on either side of the artificial tooth for installation to a tooth on either side of the artificial tooth.

Abstract: The extracoronal attachment comprises a female part (65), which is to be connected to the dental prosthesis, and a male part, which can be fastened to a natural tooth or implant and which has an approximal part (51). The approximal part has, on each of two opposite longitudinal sides, at least one longitudinal groove (20) or longitudinal rib inside of which a corresponding longitudinal rib (30) or longitudinal groove of the female part enters whereby establishing a positive connection, and has at least one occlusally facing bearing surface, on which the female part rests with a supporting surface. The female part comprises a housing, with which the longitudinal ribs (30) or longitudinal grooves of the female part and the supporting surface are provided as a single piece.

Abstract: An implant system comprising a dental implant, a holding element is provided with non-rotational joint means adapted to avoid relative rotation of the holding element with respect to the implant, and a clamping element adapted to steady retain the holding element close to said implant. The system further comprises release means provided on the clamping element and suitable to interact with release means provided on a separating tool, so that acting on the separating tool the implant can be released from the holding element without transferring damaging forces such as torsional, tensile or compressive forces, to the implant.

Abstract: The invention concerns a t-plate for detachable fixing of false teeth components to one another or to the remaining teeth, with a female part that displays a recess, a male part (6) that displays an attachment section (8) that can be brought to engage the recess in the female part and displays a continuous slot (18) that extends at least through the attachment section (8) and divides the latter into two parts (8a, 8b), and a spreading device (22, 24) that spreads the two attachment section parts (8a, 8b) and displays a first spreading means that is arranged in the slot (18) and is situated so as to engage the two attachment section parts (8a, 8b). The special feature of the invention consists in the fact that the spreading device (22, 24) displays at least one additional spreading means (24) arranged in the slot (18) at a distance from the first spreading means (22a).

Abstract: An osteo-integrated implant utilizes a metal seal formed on the outer diameter of the implant components spaced axially from the annular seat or junction of the components. The sealing surface of one component is machined on the internal diameter of a counter-bored cylindrical member extending over the junction to engage the outer diameter of the other component. The mating surface is formed on the outer diameter and is machined such that an interference fit exists between the two surfaces when the abutment is fully seated in the implant. The design allows for both radial and axial micro motion without compromise to the sealing effectiveness.

Abstract: A construction for a fixed or a removable tooth replacement between two sound or restored abutment elements includes an individually cast plate made of a metal of choice (1), which is provided with an opening of defined size on the approximal side, at the level of the contact point of the abutment, and which is secured on the respective abutment by means of an etching/adhesive bonding technique. An oval adaptation piece (3), (17) with a wedge-shaped or loop-shaped engagement incision at its top, with a tapering opening at the center, and provided with a thread, is cast welded or cemented onto the plate. A movable pin (8) which is milled from metal is guided through the congruent openings of the oval adaptation piece and the plate is cemented in the small channel prepared in the abutment element (20). The pin is secured from the outside by a fastening screw (12).

Abstract: A prosthetic superstructure has a locking device, which can be placed on a spherical head or on a similar connecting part of an implant and fixed to this and which can be accommodated in a dental prosthesis. The locking device includes locking parts, which can be moved by means of an adjusting element into and out of a locking engagement with the spherical head of the implant and the end of the adjusting element, can be actuated by means of an artificial tooth, which is disposed in the dental prosthesis close to the locking device.

Abstract: A denture adapted to be locked in place in the mouth which includes the provision of two spaced-apart implanted pins in the gum with the pins being exposed and mounting spherical heads, each adapted to receive a rigid frusto-spherical seat member which is aligned and located in the artificial gum material of a denture such that the denture can be nested on the implant structure. The two implants and seat members have a locking device in the form of a sliding plunger extending tangentially to the frusto-spherical surfaces and a bore provided therein for interfering with the head of the implant when locked.

Abstract: An overdenture attachment system for selectively attaching a denture element to a post in a tooth or a root canal is provided. The system includes a keeper element which is designed to be permanently affixed to the denture element and a cap element that is designed for attachment to the post of the tooth or root canal and which is coupled to or received by the keeper element. In the preferred embodiment, the keeper element is formed with a flange portion in which the insert element is selectively received. The interior of the flange portion of the keeper element is threaded and the exterior of the cap element is correspondingly threaded in order to enable threaded engagement of the cap element inside the keeper element.

Abstract: Disclosed is a bridge which includes a subframe which is provided with a first engaging device, an overcast which is provided with a second engaging device and a locking element which cooperates with the first and second engaging devices to removably affix the overcast onto the subframe. Once the subframe has been anchored to the jaw of a patient, the overcast can be easily unlocked and removed from the subframe without removing the locking element from the overcast.

Abstract: A mechanically retained fixed partial denture is a three part device which is assembled to form the pontic. The three parts to interlock in a non-displaceable manner as follows: 1) a buccal element engages the buccal surfaces of the abutment teeth 2) a lingual element engages the lingual surfaces of the abutment teeth; 3) part of the buccal element is within the body of the lingual element; 4) and an incisal attachment element then connects the buccal and lingual elements. The incisal attachment element comprises an elongated member which, upon assembly, extends through a linear aperture located within the body of both the buccal element and the lingual element both simultaneously and continuously, to form an interlocking system resulting in one functional unit made up of the three elements. The advantages of this mechanical retention are 1) conservation of tooth structure; 2) efficiency due to time savings; 3) low expense; and 4) no complications of tooth preparation.

Abstract: A dental appliance or prosthesis has its removable member connected to its fixed member by a clamping rib which is engaged in a groove and can have longitudinal wall portions separated from a base by respective slits, bulged outwardly by a cap screw whose shank is threadedly engageable in the base of the rib and whose head bears against conical recesses along inner surfaces of the longitudinal wall portions of the rib.

Abstract: An anchor for securing a detachable part to a fixedly mounted part of a dental prosthesis consists of a patrix which has an undercut portion and a second coupling member (12) which surrounds the first coupling member in ring-like fashion and extends into the undercut portion with at least one resilient detent element (14,20). The detent element (17,20) extends tangentially of the patrix and is held in a flat recess (41) of the second coupling member (12;112) at both sides of the location where it extends into the undercut portion of the patrix. It is preferred to provide two detent elements (17, 20) on a U-shaped insert member which can be pushed into and withdrawn from a complementary recess (16) of the second coupling member (12;112) with releasable locking action. The insert member can simply constitute a bendable spring, and the detent elements (17, 20) are constituted by a U-shaped leg (17).

Abstract: The present invention is a dental structure for removably mounting a dental appliance, including a partial denture, bridge, or similar dental appliance in an oral cavity. The dental structure includes an improved male member comprising a substantially cup-shaped body, including a base, a cylindrical wall extending form the base, a projection extending from the base in the same direction as the wall, and a relatively large rectangular stop member that provides a positive contact with an upright wall of a female member. This new and improved feature provides an additional stabilizing contact surface and also serves as a stop surface to prevent the male member from pivoting toward the upright wall of the female member when the male member is fully seated on the female member.

Abstract: A dental proosthetic construction is releasably attached at opposite ends to abutment teeth (T). At least at one end, the attachment is by means of a connector comprising a pin (4) and socket (6). The socket has an opening (10) onto the space between the abutment tooth and the prosthesis, the opening continuing over a side of the socket extending longitudinally of the pin. The pin can thus be engaged in the socket by a relative movement transverse to the pin. The pin and socket are then retained in engagement by a releasable latching arrangement (14). The engagement of the pin and socket permits relative translational movement in a direction that varies the spacing between the abutment tooth and the prosthesis but prevents translational movement in other directions. The engagement also permits relative angular movement between the pin and socket about axes transverse to the direction of the relative translational movement but prevents other angular movements.

Abstract: An artificial dental appliance for bridging the distance between two adjacent teeth. The appliance includes a bridge for filling the space between the two adjacent teeth and retaining structure for securing the bridge to the two adjacent teeth. The retaining structure includes a pin for extending transversely through a groove formed in the side of one of the teeth and through a groove formed in one side of the bridge.

Abstract: An extracoronal precise attachment comprising a male component, which is to be secured to the natural tooth or implant, and a female component, which is securable thereto and is to be connected to the tooth substitute. The female component has a plastic insert which is formed from a friction member, which encloses a portion of the male component, and a securing member, which connects thereto and is inserted in the female component.To adjust the friction between the male and female components, that is to say to activate the female component, the latter has a bore which traverses therethrough and through the securing member of the plastics insert, a screw being screwable into the bore and having a threaded pin portion and a threadless cylindrical portion, the head of the screw being supported on the female component in such a manner that, when the screw is being rotated in position, a pressure is exerted upon the plastics insert.This arrangement permits the friction to be very easily and accurately adjusted.

Abstract: The set comprises:at least one prismatic calcinable post (1) intended to be fastened to a crown and having at its base a support arm (2) and a cylindrical socket (3) arranged at the end of the support arm in a position parallel to the post,calcinable connecting parts (19) intended to be integrated in the prosthesis,fastening members (11, 12) for fastening the connecting parts on the prismatic post.The post (1) and its socket (3) in offset position constitute an extracoronary universal socket element which is easily adjustable, combined with the modular nature of the connecting parts of the set permit the mounting of several types of different attachments with a minimum number of units attachable on one and the same post.

Abstract: A dental prosthesis including a secondary member coupled to at least one prosthetic tooth suitable for being effectively mounted onto or readily removed from a primary member coupled to a remaining tooth or implant. A bar member is accommodated inside a common bore in the primary and secondary members for coupling thereof. An arresting disc member is introduced into a recess inside the prosthetic toth to block off a leading shaft portion of the bar member having the largest cross-section and preventing the bar member from falling out. The entire bar member is suitable for freely moving along the bores of the primary and secondary members. Between an intermediate portion of the bar member and the recess inside the prosthetic tooth is a space which is filled with plastic material. A trailing head portion of the bar member is ground off to correspond with the buccal exterior surface of the prosthetic tooth.

Abstract: A denture can be coupled to a sleeve-like socket of a tooth crown by a dentent member a first portion of which is anchored in the denture and a sleeve-like second portion of which is receivable in the socket. The second portion has an open end which is remote from the first portion, a conical internal surface which diverges in a direction toward the open end and a conical external surface which diverges in a direction away from the open end. The detent member is made of a tough and wear-resistant plastic material, such as a fiber-reinforced polyamide or polycarbonate. The shank of a screw is driven into a tapped bore of the first portion of the detent member and the head of the screw has a conical outer surface which can expand the second portion of the detent member in response to rotation of the screw so that the head is driven into the second portion by way of the open end.

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 dental attachment for connecting a removable dental prosthesis to an adjoining fixed tooth. The attachment includes a female member and a male assembly. The female member is inserted into the fixed tooth and includes an open mouth channel at the forward face of the fixed tooth. The male assembly includes an insert member which is received within a receiving member. The receiving member includes an elongated housing having an upwardly extending face plate through which a chamber is formed into the elongated housing to receive the insert member. The insert member includes an elongated shank portion with an upright plug at its forward end. Rearward of the plug is provided a stabilizing projection. The face plate is sandwiched between the stabilizing projection and the forward plug to provide additional stability. The male member is disposed in the dental prosthesis with the plug portion projecting forward of the face of th eprosthesis. The plug is sidably received within the channel in the female member.

Abstract: The present invention relates to a device for supporting a partial denture on a front tooth or a molar tooth. A fixture member fixedly mounted on a supporting tooth crown is provided with a supporting member. A movable member formed of a shape memory alloy carrying out the martensite-transformation so as to be engageable and disengageable with the fixture member comprises a base portion to be fixedly mounted on the denture and movable portions which are subjected to the martensite-transformation to be transformed into a memorized form, thereby being engaged with the supporting member.

Abstract: A T-attachment for the detachable fastening of dental prostheses and bridges to the residual denture which is still elastic after activation and which makes possible an even friction. The T-attachment consists of a matrix and a patrix. The patrix is provided with a continuous slot and has a longitudinal beam. An activation part is attached to the longitudinal beam, and also is provided with a slot. The slot in the activation part is open adjacent the longitudinal beam of the patrix, but has a closed slot end within the activation part. Activation is achieved by means of a conical screw which is inserted parallel to the slot end, within the activation part, the cone of the screw being located in the shaft area of the screw.

Abstract: A denture connector is provided with a hollow cylindrical female member having a retainer plate embedded in a denture crown. A male member comprises a top planar surface having a lateral projection to which there is attached a retainer block having projecting fins on outer walls thereof. A boss depends from an undersurface of the top planar member and has a bore coextensive with a threaded recess in said undersurface of the top planar member. A threaded screw with a removable expandable sleeve thereon is threaded into the threaded recess to complete the male unit. The male unit is inserted into the female unit whereby a tolerance space exists between the outer diameter of the sleeve and the inner diameter of the female cylinder. The retainer block attached to the lateral projection has a space therein whereby the combination of space and the projector fins ensure firm embedment of the retainer block in denture material.

Abstract: A connecting element is provided for detachably connecting a partial denture with the remaining set of teeth. The element is a joint whose axle extends transversely to the row of teeth and is formed by a bolt displaceably supported in the joint. The joint has two ring-shaped bolt-receiving devices, a first bolt-receiving device is connected with the partial denture and a second bolt-receiving device is connected with the remaining set of teeth and the bolt-receiving devices are connected with each other by the bolt.

Abstract: In order to activate, through a fine adjustment, the retention element (16) of an attachment for a partial, removable, dental prosthesis made up of two coulisses (1, 51), one of which being incorporated in the prosthesis (P) and the other (51) secured to a pillar tooth (D) there are utilized: a horizontal pivot (14) mounted in a sheath (2) and carrying, at one end, a retaining small head (16) and, at the other end, a bevel gear (5); and a cylindrical body (4') with vertical axis, mounted in a box (3) and carrying a bevel gear (4) which is in meshing engagement with the other hand gear (5). The base of the body (4') is provided with an operative groove (12) surfacing in the alveolar saddle (5) of the prosthesis (P). The rotation of the element (4') causes the displacement, along the pivot (14), of a plate (19) which compresses a counteracting spring (18) whose tensioning determines the retaining force of the attachment.

Abstract: A base structure for a dental prosthesis comprises first and second anchor elements which are permanently securable to the teeth on opposite sides of a space or gap in the tooth structure of a patient and a base element which is securable to the anchor elements in the gap but which comprises slidably interfitted first and second base element portions so that it is expandable to fit the width of the gap. The method of securing and forming a dental prosthesis in the gap with the base structure comprises the steps of securing the anchor elements on the teeth on opposite sides of the gap, assembling the base element with the anchor elements in the gap, securing the first and second base element portions together, forming an outer shell on the base element and securing the base element with the outer shell thereon to the anchor elements.

Abstract: A slide connector for the removable attachment of a dental prosthesis to residual dental structure in the mouth of the user has a female member attached to the prosthesis which receives a male member attached to the residual dental structure. A long pin is spring-loaded in the female member and has an enlarged head which engages in a slot of the male member to permit the head to spring into a recess at the end of this slot. By pressing the pin against the force of its loading spring, the connector can be released.

Abstract: According to the present invention, there is provided for an attachment for a dental prosthesis comprising: (a) a male member made of a rigid material provided at a retentive tooth or a dental root; and (b) a female member provided at the dental prosthesis and facing to the male member, wherein the female member has an elastic part made of an elastic material in order to grip at least an engaging portion of the male member, and the elastic part is formed as one body with an elastic lining layer made of an elastic material and being provided at an inner surface of the dental prosthesis to be in contact with an alveolus ridge. Whereby, the dental prosthesis can be stably and softly supported on the alveolus ridge.

Abstract: A denture attachment comprises a hollow cylindrical female member having a laterally extending web portion and a retention plate for embedding in a denture crown. A male member having a non-metal sleeve adapted to be inserted in the female member for rotation therein. The male member has a laterally projecting attachment arm for attaching the male member to adjacent denture material.

Abstract: The T-attachment in dovetail form comprises a patrix (1) mounted in the remainder of the teeth, as well as a matrix (2). The matrix (2) has no internal core but rather consists of a shell form making it possible, in the manufacture of the removable prosthesis by the casting method, to establish connection between the matrix (2) and the prosthesis by filling the shell form (3) with a casting material. The T-attachment is usable as dental anchoring for the attachment of dental prostheses to crowns, pivot teeth, bridges, and splint elements.

Abstract: An attachment connection between a dental prosthesis body and/or a dental bridge and an anchoring tooth and/or a crown consists of a female die hollow space (5) provided in an anchoring tooth and/or the crown, for acceptance of a male die (7) which, with its anchoring part (9), is capable of being introduced into a housing (23) for attachment of the male die (7). In order to simplify the precision of fit of the attachment connection and the construction process for this attachment connection, the housing (23), which is arranged on a dental prosthesis body and/or a dental bridge, is structured in one piece with this dental prosthesis body and/or the dental bridge by means of a bonding substance with the housing (23) surrounding the anchoring part (9) of the male die (7) in box-fashion.

Abstract: A variable connector for supporting a dental prosthesis between opposing spaced apart supporting teeth, the connector including a pair of elongated bar-like body members, each of the body members being disposable in its own channel in at least one supporting tooth on opposite sides of the prosthesis being retained. At least one tubular member depends from each body member and is received in a respective bore provided in the respective supporting tooth, each bore extending through a bottom wall of its respective channel. Each tubular member includes an axial opening extending therethrough. A pair of elongated straps are provided with each strap having at least one depending pin, the straps being respectively disposable over a body member with the pins extending into the axial openings of the tubular member of that body member. The straps terminate in arms which are disposed outwardly from the supporting teeth.

Abstract: The invention relates to a support for retaining a removable dental prosthesis on the remainder of one's natural teeth. In accordance with the invention, a conical pin is mounted on the crown base of a capped tooth. A slotted conical bushing is mounted on a dental prosthesis which bushing is received in a telescopic manner on the pin. The pin and the bushing are so disposed that they are positioned vertically between the capped tooth of the remainder of the natural teeth and the adjacent tooth of the dental prosthesis. The bushing is provided with a spring element which yieldingly engages into recesses of the pin when the bushing and the pin are in total engagement with each other, thus retaining the dental prosthesis in its end position. By a corresponding force application, the yielding snap connection can be easily released, so as to remove the dental prosthesis.

Abstract: Denture attachments for establishing a connection between a tooth and an adjoining denture include a female housing anchored in a tooth, a male connector assembly with a housing and an expandable insert. The housing is secured to the denture, and is of reduced height relative thereto, whereby a portion of the denture overlies the housing. The housing is secured to the denture, and the insert is engaged in the female housing.In a modification, the housing of the male connector assembly has means to effect a secure connection with a mastic type of adhesive bond.

Abstract: A base structure for a dental prosthesis comprises first and second anchor elements which are permanently securable to the teeth on opposite sides of a space or gap in the tooth structure of a patient and a base element which is securable to the anchor elements in the gap but which comprises slidably interfitted first and second base element portions so that it is expendable to fit the width of the gap. The method of securing and forming a dental prosthesis in the gap with the base structure comprises the steps of securing the anchor elements on the teeth on opposite sides of the gap, assembling the base element with the anchor elements in the gap, securing the first and second base element portions together, forming an outer shell on the base element and securing the base element with the outer shell thereon to the anchor elements.