Stress Breaker Patents (Class 433/169)
  • Patent number: 10426580
    Abstract: Provided is an implant unit. The implant unit includes a fixture, which is assembled to an alveolar bone and includes a long hole formed in the depth-wise direction and having an opening on the top of the fixture; an intermediate structure, which is inserted to the long hole via the opening of the fixture; and an abutment assembled to the intermediate structure, wherein a first structure for coupling the fixture to the intermediate structure is formed on the inner surface of the fixture.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 1, 2019
    Inventor: Kwang Seob Kim
  • Patent number: 10383710
    Abstract: Dental prostheses are disclosed including a dental prosthesis that can comprise an abutment and a component stabilized with vitamin E. The abutment can be adapted to be secured in a patient's jaw. The component can be adapted to couple the abutment to a dental appliance.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 20, 2019
    Assignee: Zimmer, Inc.
    Inventor: Michael Scott Collins
  • Patent number: 10271928
    Abstract: An dental implant has a substantially cylindrical hollow base member; an abutment; an implant-abutment junction (IAJ) portion at one end of the base member to retain the abutment to the base member, so that the abutment is able to move within a predetermined distance alone an axial direction of the base member, and a first cushion adapted to be mounted between the abutment and the base member for providing a resistance force when the abutment is pressed to move relatively toward the base member and providing a bouncing back force when the abutment is released from the pressing.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: April 30, 2019
    Assignee: JTI BIOMED CORP.
    Inventors: Jiin-Huey Chern Lin, Chien-Ping Ju, Yen-Chun Chen
  • Patent number: 10143540
    Abstract: A dental implant system includes a dental implant, an abutment adapted to be inserted in an axial hole of the dental implant, and a locking screw adapted to be inserted in an axial through-hole of the abutment and to be screwed into the axial hole of the dental implant. The axial through-hole defined in the abutment includes a frustoconical portion configured to come into contact with a correspondingly frustoconical portion of the locking screw, wherein the median circumference of the frustoconical contact surface between the abutment and the tightening screw is configured to be disposed under the crest/connection line.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: December 4, 2018
    Inventor: Enrico Gherlone
  • Patent number: 10130448
    Abstract: The invention relates to a dental restoration, having a base which in particular comprises an implant (1) in combination with an abutment (4), and a supraconstruction (3) which is fixed to the base, in particular by adhesive bonding, wherein the base has a screw connection having a screw head which extends over or on the base. Said screw head connects the two parts of the base to each other so as to be fixed against rotation, and has an access channel (10, 35) for the screw, the opening of which is offset with respect to the extension of the axis of the screw in the lingual direction of the supraconstruction (3). The diameter of the access channel (10, 35) is smaller than the diameter of the screw head of the screw, and the screw can be screwed through the access channel (10, 35), i.e. can be screwed in and screwed out.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: November 20, 2018
    Assignee: Ivoclar Vivadent AG
    Inventor: Josef Schweiger
  • Patent number: 10111735
    Abstract: An dental implant has a substantially cylindrical solid base member; an abutment; an implant-abutment junction (IAJ) portion at one end of the base member to retain the abutment to the base member, so that the abutment is able to move within a predetermined distance in an axial direction of the base member, a first cushion adapted to be mounted between the abutment and the base member, and a second cushion, preferably an elastomer, which is sandwiched between the IAJ portion and the abutment, wherein the first and second cushion are able to provide a resistance force when the abutment is pressed to move relatively toward the base member and providing a bouncing back force when the abutment is released from the pressing.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: October 30, 2018
    Assignee: JTI BIOMED CORP.
    Inventors: Chien-Ping Ju, Jiin-Huey Chern Lin, Yen-Chun Chen
  • Patent number: 9962191
    Abstract: A spinal fixation device includes a housing defining a longitudinal axis, a bone screw member, a locking ring, and a crush ring. The bone screw member includes a head that is selectively securable within the housing and a threaded shaft. The locking ring is disposed within the housing and is radially expandable to a partially expanded position when the head of the bone screw member is positioned therein to retain the head within the housing. The crush ring is disposed within the housing proximal to the locking ring and adjacent the head of the bone screw member. The crush ring pushes against the head of the bone screw member when it transitions from an initial state to a deformed state when a force is applied thereto, which expands the locking ring to a fully expanded position to fix the bone screw member to the housing.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: May 8, 2018
    Assignee: K2M, Inc.
    Inventor: Michael Barrus
  • Patent number: 9848961
    Abstract: An dental implant has a substantially cylindrical solid base member; an abutment; an implant-abutment junction (IAJ) portion at one end of the base member to retain the abutment to the base member, so that the abutment is able to move within a predetermined distance alone an axial direction of the base member, a first cushion adapted to be mounted between the abutment and the base member, and a second cushion, preferably an elastomer, which is sandwiched between the IAJ portion and the abutment, wherein the first and second cushion are able to provide a resistance force when the abutment is pressed to move relatively toward the base member and providing a bouncing back force when the abutment is released from the pressing.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: December 26, 2017
    Assignee: JTI BIOMED CORP.
    Inventors: Chien-Ping Ju, Jiin-Huey Chern Lin, Yen-Chun Chen
  • Patent number: 9700389
    Abstract: An abutment is obtained that enables an operation of detaching the abutment from a fixture to be readily performed without having a patient open his/her mouth wide while inhibiting accidental ingestion or swallowing of an abutment that comes off. In a dental implant 100 comprising a fixture 110 and an abutment 120, when a fitting recess 121 of the abutment 120 is fitted onto a fixture head 112 so that a space is formed between a top surface 112b 1 of the fixture head 112 and a bottom surface 121a of the fitting recess 121, the fixture head 112 is secured to the fitting recess 121 by a frictional force, and an instrument insertion hole 129 for inserting an instrument for disengaging the securement by the frictional force in the space is formed on a sidewall 121c of the fitting recess 121.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: July 11, 2017
    Assignee: MEDICAL CORPORATION IT
    Inventors: Toshikazu Iijima, Yasushi Nakajima
  • Patent number: 9687322
    Abstract: A system is disclosed for installing a dental implant in a jawbone of a patient. The system includes a threaded drive shaft rotatable about an axis and a guide for supporting the drive shaft with its axis oriented in a path along which the implant is to be installed. The guide has a threaded bore for receiving a drive shaft and an opening which extends parallel to the axis of the drive shaft and opens radially outwardly from the bore. The drive shaft can then be engaged with and disengaged from the guide by radial displacement of the shaft parallel to its axis. A drill is adapted to be releasably coupled to a leading end portion of the drive shaft and may be a self-drilling implant. Rotating the drive shaft causes the drill to penetrate the jawbone of the patient.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: June 27, 2017
    Inventors: Robert P. Carmichael, Warren Spitz
  • Patent number: 9610144
    Abstract: The invention concerns a dental implant assembly including an implant component (10) which is engaged in use with a bone structure and which has an internally threaded socket (14). The assembly also includes a dental component (20), typically an abutment, crown or prosthetic tooth, which seats on the implant component and which has a passage (24) through its base (22). The dental component is clamped to the implant component by a prosthetic retaining screw (28) having a head (32) and a shank (30) which passes through the passage and is screwed into the socket of the implant component. The invention is characterized in that a separate washer (36) including a low friction polymeric material is located rotatably on the shank of the screw adjacent the screw head in order to reduce friction between the head of the screw and the base of the dental component when the screw is tightened up.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: April 4, 2017
    Assignee: SOUTHERN IMPLANTS (PTY) LTD
    Inventors: Graham Alan Blackbeard, Heather Madeleine Coombes, Leith Cumming
  • Patent number: 9603680
    Abstract: A medical device (1) for dental prosthetic systems (2), the dental prosthetic system (2) being of a type comprising: a dental product (3) comprising a housing seating (6) longitudinally extending along a height of the dental product, an implant (5) destined to be installed in a seating made in a bone tissue of a maxilla or mandible of a patient, a fixing element (4) configured such as to insert in the housing seating and enabling engagement of the dental product (3) to the implant (5); the medical device (1) comprising a preformed solid body having a predetermined volume and an elongate conformation configured such as to insert in the longitudinal housing seating (6).
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: March 28, 2017
    Inventors: Matteo Antonini, Alberto Salini
  • Patent number: 9522053
    Abstract: A dental implant abutment assembly imitates a micro-motion mechanism to direct occlusal forces internally, and uniformly distribute the occlusal forces into the body of an ossoeintegrated dental implant. The micro-motion mechanism is configured to imitate the biomechanical behavior of the periodontal ligament through a compressive action that dampens vertical, horizontal, and angular forces. A compressive ring provides a dampening effect to supportive components of the assembly. A compressive coil redirects vertical forces along a longitudinal axis of the assembly. An implant body osseointegrates into the dental alveolus. A central mobile element seats in the dental body. The compressive coil extends along the central mobile element to absorb vertical forces. The compressive ring seats on the collar of the dental implant. A threaded cannulated housing securely holds the central mobile element and the compressive coil to form a single unit.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: December 20, 2016
    Inventor: Steven Vukas
  • Patent number: 9408677
    Abstract: A dental abutment system permitting to limit the steps and time required for a dental implant procedure. The dental abutment system (10) comprises a cap (12) coupled to a retentive member (14) that is coupled to a sheath (16). The cap (12) has a shaft (18) for coupling with a bore (24) of a dental implant (20) and the sheath (16) is coupled to the bore (24) of a dental prosthesis (26) such that the dental prosthesis (26) is frictionally retained to and removable from the cap (12). The retentive member (14) may include an area-of-weakness permitting it to break-away from the cap (12) to avoid the transmission of excessive forces to the implant (20).
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: August 9, 2016
    Inventors: Laszlo Joseph Kalman, Lina Kalman
  • Patent number: 9333057
    Abstract: A screw channel directing device for a dental superstructure includes a screw channel part and an implant cooperating part, the former having a screw member seat with an elongated screw hole in the proximal end. The proximal end of the screw channel part is bowl shaped, having a convex outer bottom. The implant cooperating part comprises a collar-shaped lower implant cooperating part to be connected to a dental implant and a collar-shaped upper implant cooperating part. The lower implant cooperating part and said upper implant cooperating part form a first ball joint. The upper implant cooperating part has a distal concave seat with a radius corresponding to the radius of the outer bottom surface of the screw channel part to form a second ball joint.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: May 10, 2016
    Assignee: Heraeus Kulzer Nordic AB
    Inventor: Sture Benzon
  • Patent number: 9113982
    Abstract: In some aspects, drill guide positioning rings to be coupled to a template material of a surgical guide in a region to be drilled can include one or more retention features to receive one or more of a series of drill guides, where the retention features are configured to temporarily engage, retain, or otherwise secure the drill guide within the drill guide positioning ring, where the temporary engagement axially couples the drill guide along its longitudinal axis with respect to the drill guide positioning ring.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: August 25, 2015
    Assignee: GRS Guide System, Inc.
    Inventor: Mark Bennett Jamison
  • Patent number: 7806691
    Abstract: A removable denture system comprising a support beam fixedly attached to the individual's alveolar ridge above the mucous membrane by a plurality of dental implants, and a denture generally conforming with the dental parameters of the individual and integrated with a super-structure. The super-structure comprises at least a portion shaped in confirmation with the support beam, and a denture locking arrangement for removably though fixedly articulating the denture to the support beam preventing unintentional disengagement of the denture.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: October 5, 2010
    Assignee: Bio Dental Solution Ltd
    Inventor: Uzi Berger
  • Patent number: 7798812
    Abstract: A temporary prosthesis for use during the osseointegration process of an installed dental implant includes load-absorbing properties and is mountable to the implant, providing an aesthetic appearance to the implant site, while preventing or minimizing loads on the implant itself.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: September 21, 2010
    Assignee: L P M Dental Development Ltd.
    Inventor: Mordehai Last-Pollak
  • Publication number: 20100112520
    Abstract: The dental implant system includes implants having integral abutments therewith for the removable or fixed attachment of plural or single prosthetic teeth, as appropriate. The system for removable dental prostheses includes a metal housing permanently installed in the removable prosthesis, and a rubber retentive insert installed in the housing. The insert is removably installed over the abutment of the implant to secure the dental prosthesis thereto. The system includes transfer copings for transferring an impression to the lab for manufacture of the prosthesis, and lab processing copings and analogs for handling and forming the prosthesis during manufacture. The system may be assembled as a kit having some or all of the above components.
    Type: Application
    Filed: August 28, 2009
    Publication date: May 6, 2010
    Inventor: William B. Worthington
  • Patent number: 7682152
    Abstract: A dental implant assembly (20) including a core body (40, 140, 240, 340, 440) for engaging a tooth-replicating device (52). The core body (40, 140, 240, 340, 440) is disposed in an anchor body (24, 124, 224, 424), and a screw cap body (58) is disposed about the outer attachment surface (30, 130, 230, 430) of the anchor body (24, 124, 224, 424). The screw cap body (58) engages the bone (22) of a person to support the dental implant assembly (20) and holds the core body (40, 140, 240, 340, 440) and the anchor body (24, 124, 224, 424) together.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: March 23, 2010
    Inventors: Christopher W. Ford, Boney A. Mathew
  • Patent number: 7648362
    Abstract: A dental restoration is provided which includes a base structure and a pre-fabricated over structure which at least partially covers the base structure. An interconnecting material interconnects hardened bite elements of the over structure with the base structure. In accordance with the method of producing a dental restoration, the interconnecting material applied onto the base structure is hardened fully after the over structure has first been applied onto the still malleable interconnecting material.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: January 19, 2010
    Assignee: Ivoclar - Vivedent AG
    Inventors: Hans-Peter Foser, Urs Spirig
  • Patent number: 7524188
    Abstract: In a dental implant comprising a mounting post, a crown supported on the mounting post and a spring element supported between the mounting post and the crown so that the crown is movable within limits in axial direction relative to the mounting post against the force of the spring element, the crown is a single part and connected to the mounting post by a form locking connection while the spring element is effective directly between the mounting post and the crown.
    Type: Grant
    Filed: July 9, 2005
    Date of Patent: April 28, 2009
    Assignee: Paraplant 2000 OHG
    Inventor: Thomas Laux
  • Patent number: 7300282
    Abstract: A biofunctional dental implant wherein a crown portion is connected to a root portion without the use of the conventional short screws, or the like. A flexible abutment projects upwardly from the root portion, and the crown portion is positioned in surrounding engagement with the flexible abutment. A threaded abutment post is advanced through the flexible abutment and into receipt by the root portion. The advancement of the abutment post through the flexible abutment generates an outward pushing force for causing a plurality of flexible splines of the abutment to bend outwardly and into engagement with an elastomeric cap of the crown portion for holding the crown portion atop the root portion. In one preferred embodiment, a replacement crown portion is detachably connected to an existing root portion by way of a removable abutment screw so as to enable a broken or worn crown portion to be removed and replaced without the need for a new surgery.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: November 27, 2007
    Inventor: Schubert L. Sapian
  • Patent number: 6955540
    Abstract: A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: October 18, 2005
    Assignee: Woodwelding AG
    Inventors: Jorg Mayer, Marcel Aeschlimann, Laurent Torriani
  • Publication number: 20040152048
    Abstract: A temporary attachment for a jaw implant has a molded piece made of an elastic material situated between a base and a head. The molded piece is deformable under the influence of a screw and this deformation is transferred to the surrounding tissue. By repeated tightening of the screw during a healing phase, the gingival tissue can be widened without resulting in tissue injury. Due to the shape of the base or the head, a predetermined deformation can be produced, and may be radially asymmetric. The direction of deformation can also be selected by varying the angular position of the base or the head with respect to the longitudinal axis of the implant.
    Type: Application
    Filed: January 23, 2004
    Publication date: August 5, 2004
    Inventor: Wolfgang Dinkelacker
  • Publication number: 20040038178
    Abstract: A preparation (10, 11,12,13) to be fixed to a natural tooth part or tooth, in particular for the replacement of a load-bearing tooth part, is for example a filling for a drilled-out tooth (1), a crown, bridge or prosthesis to be placed on a tooth stub, or a tooth pin to be fixed in a tooth root for fastening an artificial tooth, a bridge or a prosthesis. The preparation has surface regions which consist of a material with thermoplastic properties. The preparation (10, 11, 12,13) is designed in a manner such that it has oscillation properties with such low damping losses that for a liquefaction of the material with thermoplastic properties by way of oscillations there are local stress concentrations required, and in a manner such that such stress concentrations only occur in the region of the preparation surface.
    Type: Application
    Filed: April 17, 2003
    Publication date: February 26, 2004
    Applicant: WOODWELDING AG
    Inventors: Jorg Mayer, Marcel Aeschlimann, Laurent Torriani
  • Publication number: 20030152889
    Abstract: An artificial tooth or teeth and occlusion-controlling system(s) thereof, wherein information about the situation of occlusion in the mouth of a patient is transmitted to a computer (151) from a biting-pressure sensing element(s) (155) or film(s) incorporated in the present invention, and said computer (151) dictates control-signals to make a driving motor (152) or motors drive and adjust an occlusal surface of said patient in place so as to give a desirable, appropriate functional occlusion to said patient's comfort instantly.
    Type: Application
    Filed: July 19, 2002
    Publication date: August 14, 2003
    Inventor: Hideyo Uji
  • Publication number: 20020177103
    Abstract: An improved dental prostheses includes an implant abutment mounted to an abutment tooth and having an endless O-ring groove formed about the outer axial surface of the implant abutment in a plane generally transverse to the implant abutment axis. The implant abutment has a tapered surface which mates closely with a similarly tapered retainer cavity in the dental prosthesis to frictionally support the same and has a complementary O-ring groove defined in the retainer surface. A resilient O-ring retentive element is fitted over the implant abutment such that the ring cross section is partly received within the implant abutment groove and partly within the retainer groove, thereby forming a resilient interference fit between the dental prosthesis and the implant abutment. The arrangement enables easy removal of the prosthesis for hygiene related activities and application to multiple abutments to support an appliance.
    Type: Application
    Filed: November 23, 2001
    Publication date: November 28, 2002
    Inventor: Mark S. Pelak
  • Patent number: 6431865
    Abstract: A stable dental prosthesis or artificial tooth which makes occlusal adjustment easier and which includes a stress breaking layer made of a flexible buffering material and provided between an occlusal surface portion and a connecting portion of the artificial tooth. The stress breaking layer made of the flexible buffering material can adjust the biting force in response to any varying occlusal pressure, allowing flexibly adjustment of position movement of the occlusal surface portion, and also allowing its vertical, horizontal and oblique movements, while the person wearing the artificial tooth is resting. The artificial tooth also allows easy adjustment of the cusp angle of the occlusal surface portion.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: August 13, 2002
    Inventor: Hideyo Uji
  • Patent number: 6394808
    Abstract: A prosthetic device for intraosseous dental implants includes an intraosseous support implant (11) and an intraplantar pin (12). The support implant (11) has a blind cavity (18) open towards its top and with at least one internal zone having a conical surface (20). The intraplantar pin (12) has a shank (21) which is intended to be implanted in the cavity of the implant and a transmucosa connection head (22) lying above the implant. The shank (21) has at least one conical external zone (23) of forced coupling with the conical internal zone (20) of the cavity of the support implant.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: May 28, 2002
    Assignee: Physioplant S.R.L.
    Inventors: Rosario Rizzo, Giuseppe Bellandi
  • Patent number: 6315563
    Abstract: Given a single tooth implant with a base member and an abutment for a crown, whereby the base member, in sequence from the coronal to the cervical end, comprises a positive lock region with positive lock elements for joining to the abutment and a centering region and the abutment, complementary thereto, comprises a positive lock section and a centering section, the positive lock elements of the positive lock region are arranged offset from the face wall of the base member. The centering region can directly adjoin the positive lock region. According to an advantageous embodiment, a seal ring can be provided between the abutment and the base member.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: November 13, 2001
    Assignee: IMZ Fertigungs-und Vertriebsgesellschaft für dentale Technologie mbH
    Inventor: David R. Sager
  • Patent number: 6302693
    Abstract: An engagement mechanism for dental prostheses that include supporting pins with headed terminations and implant and/or abutment members with cooperative sockets. A dental implant firmly mounted to a user's bone is provided at the distal end with a socket defining a cavity of cooperative dimensions to receive the headed termination. The headed termination is firmly kept in the cavity. In this manner, better utilization of the limited inter dental space is achieved. One way of securing the headed termination is by using a cementitious compound to bind the headed termination. Another way is to use an O-ring to secure the headed termination. The socket can be positioned directly in the distal end of an implant member or in an abutment.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: October 16, 2001
    Inventor: Raul R. Mena
  • Patent number: 6056546
    Abstract: Claspless removable partial dentures have a metal bar that connects to a metal framework to which is attached metal occlusal rests. The metal occlusal rests fit into prepared slots in the natural teeth on either side of the edentulous area. This metal framework supports the resilient dental material that bonds the denture teeth in their position and is bonded to the metal framework. This resilient dental material extends into the inward curve of the natural teeth on either side of the edentulous area, and by sliding into the inward curve, the partial is held in position. The metal framework is left open beneath the denture teeth so that each denture tooth can move into the resilient dental material, which then absorbs the force of mastication.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: May 2, 2000
    Inventor: Ambrose B. Van Handel
  • Patent number: 6019604
    Abstract: A resilient connecting structure for individually and resiliently connecting a dental prosthesis structure to a base component. The connecting structure is adapted to simulate the link provided by a natural periodontal ligament between a natural tooth and a natural healthy gum. The connecting structure thus allows individual three-dimentional freedom of pivotal movement about the base of the prosthesis structure, including rotation about a longitudinal axis of the latter. In one embodiment of the invention, the connecting structure is incorporated in an artificial dental structure that also includes the dental prosthesis and the base component. The dental prosthesis has dental body defining a crown section, a neck section and a root section. The base component has at least one base recess formed therein for receiving a section of said dental prosthesis. The connecting structure includes a membrane made of a resilient membrane material. The membrane is mounted on said root section of said dental prosthesis.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: February 1, 2000
    Inventor: Sylvain Gougeon
  • Patent number: 5947734
    Abstract: A tooth implant arrangement has an implant body which can be inserted in a jaw or jawbone and a structural member which can be detachably secured to the implant body by means of a bolt-like mounting element, and on which a cap, a replacement crown or the like can be placed and secured. The structural member is mounted so as to be resiliently movable relative to the implant body in the axial and/or the sagittal directions. The mobility of a tooth implant arrangement of this type in the jaw or jawbone is comparable to that of a natural tooth.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: September 7, 1999
    Inventor: Michael Hanel
  • Patent number: 5915968
    Abstract: Enossal tooth implant for firmly seating dental prostheses has an essentiy cylindrical base member, which is introducible into a bore introduced in a jaw bone and has a blind bore open toward its coronal end, a spacer sleeve which has an inside bore, is emplaceable on a coronal face edge of the base member and has an arrangement for a twist-resistant fastening to the base member, and has a fastening head for a dental prosthesis and an implant post which is introducible through the inside bore into the blind bore and connectable to the base member.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: June 29, 1999
    Assignee: IMZ Fertigungs-und Vertriebsgesellschaft fur dentale Technologie mbH
    Inventors: Axel Kirsch, Walter Durr
  • Patent number: 5810589
    Abstract: A dental implant-abutment combination that absorbs the forces of chewing, shifts some of the horizontal loads to a more vertical plane, shifts the horizontal loads which remain, to a point below the crest of the bone, lowers the pivoting axis, and distributes the forces over a larger surface area, all so as to prevent saucerization in the bone surrounding the implant, thereby preventing bacteria from gaining access to the deeper areas, and preventing implant failure due to the loss of supporting bone.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: September 22, 1998
    Assignee: Dentistry Researchers & Designers Inc.
    Inventors: Bruce T. Michnick, Gary Kitzis, Ron Beauman
  • Patent number: 5752830
    Abstract: A dental implant system has an inner housing removably received in an outer housing embedded in the bone for allowing a retentive screw or post retaining a prosthesis to be easily removed. A suspension mechanism provides lateral movement of the prosthesis for transferring forces from biting or chewing to the inside walls of the outer housing. A resilient coating on the inside wall of the inner housing absorbs the external forces. An interlocking gingival collar and abutment arrangement limit rotation of the prosthesis.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: May 19, 1998
    Inventor: Omar F. Suarez
  • Patent number: 5695335
    Abstract: A primary implant member anchored in the jaw receives a secondary member which is held in the primary member by direct engagement by the head of a screw which bottoms in the primary member and O-ring bridges the radial play between these members in a dental implant. As a result, the retention of the secondary member does not depend on the state of the O-ring and the force with which the O-ring is held. Axial mobility and inclination of the secondary member is also permitted by the O-ring bridge.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: December 9, 1997
    Assignee: Mke Metall- Und Kunststoffwaren Erzeugungsgmbh
    Inventors: Franz Haas, Rudolf Schneider
  • Patent number: 5678995
    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.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: October 21, 1997
    Assignees: IMZ Fertigungs- und Vertriebs gesellschaft fuer dentale Technolgie mbH, Eberle Medizintechnische Elemente GmbH
    Inventors: Axel Kirsch, Walter Durr
  • Patent number: 5678994
    Abstract: A flexible tooth for mounting in dentures wherein the top of the tooth or crown and base of the tooth are separate parts bonded together by an annular, wedge shaped elastomeric layer. Limited area planar contact between the crown and base along the central axis provides unyielding resistance to biting forces while angular movement within the elastomeric layer allows flexibility of the crown with respect to the base so as to give a user the feeling of a natural tooth.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: October 21, 1997
    Inventor: Gordon Morehead
  • Patent number: 5584693
    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).
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: December 17, 1996
    Assignees: Katsunari Nishihara, Toyama Precious Metals Co., Ltd.
    Inventor: Katsunari Nishihara
  • Patent number: 5571016
    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.
    Type: Grant
    Filed: January 24, 1995
    Date of Patent: November 5, 1996
    Assignee: Nobelpharma AB
    Inventors: Abraham Ingber, Vincent Prestipino, Anopet Phimmasone
  • Patent number: 5564927
    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.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: October 15, 1996
    Assignee: Sure-Bite, Inc.
    Inventors: Larry W. Barnes, Sr., David O. Snyder
  • Patent number: 5554027
    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.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: September 10, 1996
    Assignee: Medevelop AB
    Inventor: Per-Ingvar Br.ang.nemark
  • Patent number: 5509804
    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.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: April 23, 1996
    Inventor: Erich Arzt
  • Patent number: 5492470
    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.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: February 20, 1996
    Inventor: Irving Anders
  • Patent number: 5468150
    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.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: November 21, 1995
    Inventor: Dierk Brammann
  • Patent number: 5425639
    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.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: June 20, 1995
    Inventor: Irving Anders
  • Patent number: 5362234
    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.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: November 8, 1994
    Inventors: Alfred Salazar, Ricardo Guerra