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).
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Publication number: 20080008981Abstract: 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: ApplicationFiled: September 10, 2007Publication date: January 10, 2008Applicant: Friadent GmbHInventors: Werner Groll, Dietrich Wolf, Thomas Lange
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Publication number: 20060246398Abstract: 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: ApplicationFiled: April 19, 2006Publication date: November 2, 2006Applicant: Friadent GmbHInventors: Werner Groll, Dietrich Wolf, Andre Spanel, Thomas Lange, Norbert Bergner
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Patent number: 6974322Abstract: 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: GrantFiled: July 12, 2002Date of Patent: December 13, 2005Inventors: Dittmar May, Pascale Grote, Egbert Kremer, Werner Groll
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Publication number: 20020177106Abstract: 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: ApplicationFiled: July 12, 2002Publication date: November 28, 2002Inventors: Dittmar May, Pascale Grote, Egbert Kremer, Werner Groll
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Patent number: 6280192Abstract: 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: GrantFiled: March 23, 2000Date of Patent: August 28, 2001Assignee: Degussa AGInventors: Werner Groll, Egbert Kremer
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Patent number: 5779480Abstract: 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: GrantFiled: May 20, 1997Date of Patent: July 14, 1998Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Thomas Lange, Pascale Grote, Willi Meiers
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Patent number: 5688123Abstract: 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: GrantFiled: May 4, 1995Date of Patent: November 18, 1997Assignee: Degussa AktiengesellschaftInventors: Willi Meiers, Thomas Lange, Werner Groll
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Patent number: 5560742Abstract: 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: GrantFiled: February 27, 1989Date of Patent: October 1, 1996Assignee: Degussa AGInventors: Werner Groll, Gernot Schoeck, Doris Hathaway, Manfred Stuemke
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Patent number: 5298218Abstract: 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: GrantFiled: September 4, 1992Date of Patent: March 29, 1994Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Doris Hathaway, Bernd Kempf, Gernot Schock
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Patent number: 5240172Abstract: 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: GrantFiled: July 6, 1992Date of Patent: August 31, 1993Assignee: Degussa AktiengesellschaftInventors: Rudi Steinke, Stefan Schittny, Bernd Kempf, Werner Groll
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Patent number: 5221207Abstract: 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: GrantFiled: October 2, 1991Date of Patent: June 22, 1993Assignee: Degussa AktiengesellschaftInventors: Gernot Schoeck, Bernd Kempf, Werner Groll
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Patent number: 4970050Abstract: 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: GrantFiled: December 13, 1989Date of Patent: November 13, 1990Inventors: Werner Groll, Angela Klaus, Thomas Lange
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Patent number: 4863514Abstract: 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: GrantFiled: February 8, 1989Date of Patent: September 5, 1989Assignee: Degussa AtiengesellschaftInventors: Werner Groll, Josef Rothaut
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Patent number: 4859412Abstract: 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: GrantFiled: May 23, 1988Date of Patent: August 22, 1989Inventors: Werner Groll, Doris Hathaway, Gernot Schock
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Patent number: 4836984Abstract: 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: GrantFiled: December 11, 1987Date of Patent: June 6, 1989Assignee: Degussa AktiengesellschaftInventors: Rudolf Wagner, Harry Schiwiora, Manfred Stumke, Werner Groll
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Patent number: 4806306Abstract: 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: GrantFiled: March 9, 1988Date of Patent: February 21, 1989Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Rudi Steinke, Harry Schiwiora
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Patent number: 4689197Abstract: 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: GrantFiled: April 4, 1986Date of Patent: August 25, 1987Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Josef Rothaut, Angela Klaus, Rudi Steinke
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Patent number: 4681735Abstract: 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: GrantFiled: September 12, 1985Date of Patent: July 21, 1987Assignee: Degussa AktiengesellschaftInventors: Werner Groll, Gernot Schock, Doris Hathaway, Rudolf Wagner