Patents by Inventor Werner Groll

Werner Groll has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080008981
    Abstract: The invention proposes an abutment set for a dental implant, comprising an abutment post (2) for fixing to a dental implant (1), which abutment post is anatomically pre-configured, and an abutment cap (7), which cap is anatomically pre-configured, and adapted for mounting onto said abutment post without further machining by the customer; wherein the abutment post is adapted for fixing to a dental implant and for receiving said abutment cap without further machining by the customer, and the abutment cap is adapted to receiving a veneering (12); and the abutment cap and the abutment post being pre-fabricated for providing appropriate dental prostheses for a multiplicity of different patients, and wherein the abutment cap has means (10) for defined rotational and lateral fixing in impression material applied by a dentist, as well as a method for manufacturing a dental prosthesis.
    Type: Application
    Filed: September 10, 2007
    Publication date: January 10, 2008
    Applicant: Friadent GmbH
    Inventors: Werner Groll, Dietrich Wolf, Thomas Lange
  • Publication number: 20060246398
    Abstract: A dental implant (1) includes a top section (17) and at least one top surface (7, 28) that is provided with a micro-roughened surface, such as an average roughness (RA) of about 0.7-1.1 ?m, by etching. The top surface may include a porous surface of pore dimensions of less than about 10 ?m or a coating, such as a 0.5 ?m thickness of titanium nitride. The roughened surfaces promote healing in and tissue growth at the top, enhancing the sealing effect at the epithelium interface with the implant.
    Type: Application
    Filed: April 19, 2006
    Publication date: November 2, 2006
    Applicant: Friadent GmbH
    Inventors: Werner Groll, Dietrich Wolf, Andre Spanel, Thomas Lange, Norbert Bergner
  • Patent number: 6974322
    Abstract: An implant-supported dental prosthesis (10) has in its main body (12) several basal recesses (13) in which in each case a conical cap (7) is embedded in self-curing plastic. Each conical cap (7) sits on a conical peg (6) of a construction post (2), which is inserted in a conical hole of an enossal implant (1). Exclusively prefabricated components are used for the production of the dental prosthesis. The embedding of the conical caps (7) in the main body (12) of the dental prosthesis (10) takes place in a single session in the dental practice, after which the dental prosthesis is completed.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: December 13, 2005
    Inventors: Dittmar May, Pascale Grote, Egbert Kremer, Werner Groll
  • Publication number: 20020177106
    Abstract: An implant-supported dental prosthesis (10) has in its main body (12) several basal recesses (13) in which in each case a conical cap (7) is embedded in self-curing plastic. Each conical cap (7) sits on a conical peg (6) of a construction post (2), which is inserted in a conical hole of an enossal implant (1). Exclusively prefabricated components are used for the production of the dental prosthesis. The embedding of the conical caps (7) in the main body (12) of the dental prosthesis (10) takes place in a single session in the dental practice, after which the dental prosthesis is completed.
    Type: Application
    Filed: July 12, 2002
    Publication date: November 28, 2002
    Inventors: Dittmar May, Pascale Grote, Egbert Kremer, Werner Groll
  • Patent number: 6280192
    Abstract: A device for handling dental implants (1) with a locking screw (4). The device includes an adapter (6), which is secured to the implant (1) by a central screw (8). A ratchet insert (23) can be snap-connected to the adapter (6) in a positive-locking manner. A screwdriver (31) rotatably arranged in the ratchet insert (23), can release a screw (8) connecting the adapter (6) to the implant (1). The implant (1) connected to the adapter (6) is held by a two-part holding hub (11) in a receptacle. The implant (1) is handled by the ratchet insert (23) and is screwed into the prepared bore in the jaw.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: August 28, 2001
    Assignee: Degussa AG
    Inventors: Werner Groll, Egbert Kremer
  • Patent number: 5779480
    Abstract: A prosthetic abutment made from metal for securing to the enossal part of a dental implant is capable of being adapted to the natural shape of the individual teeth inasmuch as it ends on the occlusal side in a truncated cone produced by removal of material from a paraboloid of revolution, said truncated cone having in cross-section a semi-elliptical base plane on the labial side and a paraboloid base plane on the lingual side.
    Type: Grant
    Filed: May 20, 1997
    Date of Patent: July 14, 1998
    Assignee: Degussa Aktiengesellschaft
    Inventors: Werner Groll, Thomas Lange, Pascale Grote, Willi Meiers
  • Patent number: 5688123
    Abstract: A transfer cap for dental implants which is protected during the working in the mouth against rotations and shifting and therefore permits a precise molding of the oral situation, carries one or more resilient flaps on its open end and is optionally provided with protuberances.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: November 18, 1997
    Assignee: Degussa Aktiengesellschaft
    Inventors: Willi Meiers, Thomas Lange, Werner Groll
  • Patent number: 5560742
    Abstract: Gold-free palladium-silver alloys for dentures [dental prostheses] which alloys can be veneered without color changes with dental ceramics and can be easily removed from the mold after the casting contain 45 to 80% by weight palladium, 7 to 50% by weight silver, 0 to 5% by weight gold, 0 to 5% by weight tin, 0 to 5% by weight indium, 0 to 3% by weight zinc, 0 to 2% by weight copper, 0 to 1% by weight ruthenium, iridium and/or rhenium, 0 to 7% by weight gallium, 0 to 5% by weight cobalt and 0 to 3% by weight germanium, whereby of the elements gallium, cobalt and germanium at least two must be present with contents totalling 2 to 9% by weight.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: October 1, 1996
    Assignee: Degussa AG
    Inventors: Werner Groll, Gernot Schoeck, Doris Hathaway, Manfred Stuemke
  • Patent number: 5298218
    Abstract: Palladium based dental alloys do not show unaesthetic discolorations after ceramic firing if said alloys contain 66-85% by weight palladium, 1-20% by weight gold; 0-4% by weight silver; 0-4% by weight of at least one of platinum, iron and/or cobalt; 0.5-7% by weight of each of gallium, tin and indium, whereby the amount of said components total 9-14% by weight; 0-2% by weight germanium and/or zinc; and 0-1% by weight iridium, ruthenium and/or rhenium.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: March 29, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Werner Groll, Doris Hathaway, Bernd Kempf, Gernot Schock
  • Patent number: 5240172
    Abstract: White solder alloys for dental and jewelry parts, with working temperatures around 1000.degree. C., contain 38 to 70% by weight gold, 6 to 20% by weight palladium, 8 to 40% by weight silver, 1 to 6% by weight iron and/or cobalt, 0 to 10% by weight copper, 0-5% each by weight indium, zinc and tin, 0 to 4% each by weight gallium and germanium, ruthenium and/or rhenium. The sum of the contents of tin, zinc, indium, gallium and germanium can be between 1 and 5% by weight.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: August 31, 1993
    Assignee: Degussa Aktiengesellschaft
    Inventors: Rudi Steinke, Stefan Schittny, Bernd Kempf, Werner Groll
  • Patent number: 5221207
    Abstract: A yellow dental alloy is disclosed with high gold content for castings and ceramic veneers with an adjusted thermal expansion coefficient that does not produce any undesirable discoloration of the ceramic veneers and that is very hard. It contains 70 to 85% by weight gold, 5 to 13% by weight silver, 2 to 9% by weight platinum, 0 to 4.5% by weight palladium, 0.05 to 1% by weight iridium, rhenium, rhodium and/or ruthenium, 2 to 8% by weight copper, 0.1 to 6% by weight indium, zinc and/or germanium, and 0 to 4% by weight gallium, iron and/or tungsten.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: June 22, 1993
    Assignee: Degussa Aktiengesellschaft
    Inventors: Gernot Schoeck, Bernd Kempf, Werner Groll
  • Patent number: 4970050
    Abstract: A method of producing a sintered, very high density dental prosthesis from a suspension containing noble-metal powder mixtures with bi or multimodal particle-size distribution and a mixing liquid. The suspension is molded to the desired shape and then the dental prosthesis is dried. The molded dental prosthesis is then heat-treated 5 to 45 minutes between 100.degree. and 400.degree. C., then heated with an average temperature elevation of 50 to 300 K/min. to 800.degree. C. and then brought to the sintering temperature T at 20 to 200 K/min. The sintering temperature T is between T.sub.solidus - 200) and T.sub.solidus - 70), whereby T.sub.solidus is the solidus temperature of the sintered alloy. The cooling-down of the dental prosthesis takes place under a vacuum or a protective gas.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: November 13, 1990
    Inventors: Werner Groll, Angela Klaus, Thomas Lange
  • Patent number: 4863514
    Abstract: There is provided a material for dentures having metallic matrix, containing 0.5-30 volume % glass having a softening temperature above 650.degree. C. and/or ceramic particles having a maximum grain size of 40 .mu.m.
    Type: Grant
    Filed: February 8, 1989
    Date of Patent: September 5, 1989
    Assignee: Degussa Atiengesellschaft
    Inventors: Werner Groll, Josef Rothaut
  • Patent number: 4859412
    Abstract: An economical alloyed powder for dental amalgams exhibiting good working properties is obtained from pressed and sintered molded bodies by mechanical comminution. The formed body is produced by mixing and pressing powders of elemental silver, copper and tin with a subsequent sintering between 150.degree. C. and the solidus temperature of the alloy being formed. The sintering is performed until a homogeneous distribution of the tin has been achieved in the silver and copper particles.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: August 22, 1989
    Inventors: Werner Groll, Doris Hathaway, Gernot Schock
  • Patent number: 4836984
    Abstract: Palladium alloys consisting of (a) 65 to 85% palladium, (b) 0 to 10% gold and/or 0 to 5% platinum, (c) 0.1 to 10% tin, (d) 1 to 10% gallium, (e) 1 to 12% copper, (f) 0.05 to 1.5% ruthenium and/or 0.05 to 0.7% rhenium as well as (g) 0.01 to 4% tungsten and/or 0.01 to 4% aluminum and/or 0.01 to 4% zinc are use to produce firmly seated and removable dentures. These alloys do not form oxide films when melted in air.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: June 6, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Rudolf Wagner, Harry Schiwiora, Manfred Stumke, Werner Groll
  • Patent number: 4806306
    Abstract: Noble metal alloys are used to produce attachments that can be cast-on, particularly in dental technology, having a melting range above 1500.degree. C. The alloys comprise about 40-70% platinum, about 10-40% palladium, about 5-20% iridium, about 0.5-10% gold, about 0-13 3% silver and about 0-1% each of ruthenium and rhodium.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: February 21, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Werner Groll, Rudi Steinke, Harry Schiwiora
  • Patent number: 4689197
    Abstract: A denture with a metallic microstructure and with low shrinkage and porosity is produced by metallurgical sintering by providing a multimodal size distribution of coarse and fine fractions of metal powder, optionally also with glass or ceramic powder, converting this powder mixture with water into a slip, modelling the denture with this, and sintering the slip at a temperature which exceeds the solidus temperature of at least one component of the powder mixture.
    Type: Grant
    Filed: April 4, 1986
    Date of Patent: August 25, 1987
    Assignee: Degussa Aktiengesellschaft
    Inventors: Werner Groll, Josef Rothaut, Angela Klaus, Rudi Steinke
  • Patent number: 4681735
    Abstract: Economical but readily workable palladium alloys for baking on dental ceramics consist of 60 to 80% palladium, 0 to 8% gold, 0 to 5% platinum, 0 to 1% ruthenium and/or rhenium, 2 to 20% copper, 1 to 12% tin and/or indium, 0.2 to 5% of at least one of the elements tungsten, molybdenum, niobium, and tantalum, and 0 to 15% cobalt, with the proviso that the sum of tin and indium must be between 5 and 14%.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: July 21, 1987
    Assignee: Degussa Aktiengesellschaft
    Inventors: Werner Groll, Gernot Schock, Doris Hathaway, Rudolf Wagner