Patents by Inventor Pekka Vallittu

Pekka Vallittu 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: 20060275734
    Abstract: The invention relates to a matrix band that is characterized in that it comprises fibers and a matrix, at least a portion of said matrix being at least partially uncured. The invention further relates to a dental restoration kit, a prepreg and the use of said matrix.
    Type: Application
    Filed: May 21, 2004
    Publication date: December 7, 2006
    Inventors: Pekka Vallittu, Lippo Lassila, Antti Yli-Urpo, Arzu Tezvergil
  • Patent number: 7001181
    Abstract: The invention relates to an applicator system (1) for application of a prefabricated reinforced composite post or anchor in its non-cured form into a dentinal canal (3). The invention is characterized in that the applicator system (1) comprises a prefabricated fiber-reinforced composite post or anchor in its non-cured form comprising a matrix and fibers, and an applicator tube (5) having a first end and a second end, wherein the inner diameter dT of said tube (5) is at most 5% larger than the outer diameter DP/A of said post or anchor in its non-cured form, and the outer diameter DT of the second end of said tube (5) through which the post or anchor is applied into the dentinal canal (3) is 0,5-2 mm. The invention further relates to the use of said applicator system.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: February 21, 2006
    Assignee: Stick Tech Oy
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Patent number: 6881062
    Abstract: The invention relates to a method and silicone product for shaping a fibre product used in dentistry to reinforce a prosthetic appliance or a similar structure under construction to conform to the final location. The fibre product containing fibres and curable material is pressed by means of silicone material against the final location or a model thereof followed by curing the curable material present in the fibre product. The invention is characterized in that the silicone material is a polymerised, elastic and soft silicone material that has been shaped to a piece (10,11) corresponding to the size and shape of the fibre product to be shaped, and that when pressed, the silicone material adopts the shape of the final location or the model thereof.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: April 19, 2005
    Assignee: Stick Tech Oy
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Publication number: 20040166304
    Abstract: A prepreg containing fibers and a curable matrix, the prepreg having a core and a surface part encasing the core, where the matrix of the core and of the surface part are made of the same material and where the proportion of the matrix to the fibers is higher in the core than in the surface part. A composite obtainable from the prepreg as well as the use of the composite or prepreg are also disclosed.
    Type: Application
    Filed: December 5, 2003
    Publication date: August 26, 2004
    Inventors: Pekka Vallittu, Lippo Lassila, Antti Yli-Urpo
  • Publication number: 20040166472
    Abstract: The invention relates to an applicator system (1) for application of a prefabricated reinforced composite post or anchor in its non-cured form into a dentinal canal (3). The invention is characterized in that the applicator system (1) comprises a prefabricated fiber-reinforced composite post or anchor in its non-cured form comprising a matrix and fibers, and an applicator tube (5) having a first end and a second end, wherein the inner diameter dT of said tube (5) is at most 5% larger than the outer diameter DP/A of said post or anchor in its non-cured form, and the outer diameter DT of the second end of said tube (5) through which the post or anchor is applied into the dentinal canal (3) is 0,5-2 mm. The invention further relates to the use of said applicator system.
    Type: Application
    Filed: April 9, 2004
    Publication date: August 26, 2004
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Publication number: 20040115240
    Abstract: The invention relates to a composite for attaching, growing and/or repairing of living tissue in mammals. The composite comprises a non-expandable matrix polymer and a water-expandable porosity agent. The invention also relates to the use of said composite.
    Type: Application
    Filed: February 9, 2004
    Publication date: June 17, 2004
    Inventors: Timo Narhi, Antti Yli-Urpo, Pekka Vallittu, Marju Vakiparta, Teemu Tirri, Mervi Puska, Lippo Lassila, Tapani Lastumaki, Allan Ho
  • Publication number: 20040106085
    Abstract: A dental or medical device for use in construction of a finished dental or medical appliance which includes a shapable prepreg, where the prepreg coontains fibers, and at least one solid body attached to the prepreg. The solid body attached to the prepreg constitutes a solid body included in the finished appliance and forms a part or whole of the outer surface of the finished appliance. Also disclosed are methods for the manufacture of the device, either so that the prefabricated solid body is contacted with the prepreg, or so that the solid body is created simultaneously with the manufacturing of the device.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 3, 2004
    Inventors: Pekka Vallittu, Lippo Lassila, llkka Kangasniemi
  • Publication number: 20040097627
    Abstract: The invention relates to polymerizable multifunctional polymer composites and compositions, which are suitable for dental and medical applications, such as dental prostheses, filling materials, implants and the like. It also relates to a method for the manufacture of such polymerizable multifunctional polymer composites and compositions, and to the use of the multifunctional polymer composites and compositions in dental and medical applications. A multifunctional polymer composite or composition is manufactured from 30-99 wt % of a monomer mixture containing 30-99 wt % of a dendrimer or a combination of dendrimers and 1-70 wt % of a reactive solvent or a combination of reactive solvents, and 0.1-70 wt % of a nanofiller or a combination of nanofillers.
    Type: Application
    Filed: January 7, 2004
    Publication date: May 20, 2004
    Inventors: Pekka Vallittu, Lippo Lassila, Mikael Skrifvas, Eeva Viljanen, Antti Ylu-Urpo
  • Patent number: 6733288
    Abstract: The use of a prepreg containing at least one fiber and a matrix to be cured during application, for the production of a fiber-reinforced composite, for active orthodontic therapy. An active orthodontic appliance is disclosed which includes an arch wire in at least one part, directly contactable with teeth and including a fiber-reinforced composite containing at least one fiber and a matrix, the arch wire including a loop directly contactable with a tooth or teeth to be moved by the appliance. A process for manufacturing an active orthodontic appliance and to an active orthodontic method of treatment are also disclosed.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: May 11, 2004
    Assignee: Stick Tech Oy
    Inventors: Pekka Vallittu, Lippo Lassila, Ilkka Kangasniemi
  • Publication number: 20030203333
    Abstract: The invention relates to the use of a prepreg comprising at least one fiber and a matix to be cured during application, for the production of a fiber-reinforced composite, for active orthodontic therapy. The invention further relates to an active orthodontic appliance consisting essentially of an arch wire in at least one part, directly contactable with teeth and consisting essentially of a fiber-reinforced composite comprising at least one fiber and a matrix, said arch wire comprising a loop directly contactable with a tooth or teeth to be moved by the appliance. The invention still relates to a process for manufacturing an active orthodontic appliance and to an active orthodontic method of treatment.
    Type: Application
    Filed: April 29, 2002
    Publication date: October 30, 2003
    Inventors: Pekka Vallittu, Lippo Lassila, Ilkka Kangasniemi
  • Patent number: 6595776
    Abstract: An applicator system (2) which includes a fiber-reinforced composite (FRC) post (4) or anchor in its non-polymerized form including a resinous matrix and fibers, i.e., a prepreg (4); and an applicator tube (8). The inner diameter (dT) of the tube (8) is essentially the same or slightly larger than the outer diameter (DP/A) of the FRC post (4) in its non-polymerized form. The outer diameter (DT) end of the tube through which the FRC post is applied is essentially the same or slightly smaller that the coronal opening of the canal (6). The applicator system (2) may be used to prepare permanent or temporary root canal (6) posts, to make a tooth canal (6) filling and to make a post and/or anchorage system that forms a continuous FRC structure from the apex of the tooth to the coronal part of the tooth.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: July 22, 2003
    Assignee: Stick Tech Oy
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Publication number: 20030068598
    Abstract: A dental or medical device for use in construction of a finished dental or medical appliance which includes a shapable prepreg, where the prepreg coontains fibers, and at least one solid body attached to the prepreg. The solid body attached to the prepreg constitutes a solid body included in the finished appliance and forms a part or whole of the outer surface of the finished appliance. Also disclosed are methods for the manufacture of the device, either so that the prefabricated solid body is contacted with the prepreg, or so that the solid body is created simultaneously with the manufacturing of the device.
    Type: Application
    Filed: October 10, 2001
    Publication date: April 10, 2003
    Inventors: Pekka Vallittu, Lippo Lassila, Ilkka Kangasniemi
  • Publication number: 20030013065
    Abstract: The invention relates to an applicator system (2) for application of a reinforced non-polymerized composite post (4) or anchor into a dentinal canal (6). The applicator system comprises a fiber-reinforced composite (FRC) post (4) or anchor in its non-polymerized form comprising a resinous matrix and fibers, i.e. a prepreg (4); and an applicator tube (8) wherein the inner diameter (dT) of said tube (8) is essentially the same or slightly larger than the outer diameter (DP/A) of said FRC post (4) or anchor in its non-polymerized form, and the outer diameter (DT) of the end of said tube through which the FRC post or anchor is applied into the canal is essentially the same or slightly smaller than the coronal opening of the canal (6).
    Type: Application
    Filed: July 10, 2001
    Publication date: January 16, 2003
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Publication number: 20030003423
    Abstract: The invention relates to a method and silicone product for shaping a fiber product used in dentistry to reinforce a prosthetic appliance or a similar structure under construction to conform to the final location. The fiber product containing fibers and curable material is pressed by means of silicone material against the final location or a model thereof followed by curing the curable material present in the fiber product. The invention is characterized in that the silicone material is a polymerised, elastic and soft silicone material that has been shaped to a piece (10,11) corresponding to the size and shape of the fiber product to be shaped, and that when pressed, the silicone material adopts the shape of the final location or the model thereof.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 2, 2003
    Inventors: Ilkka Kangasniemi, Pekka Vallittu
  • Patent number: 6197410
    Abstract: This invention relates to a shapable prepreg comprising fibers and a polymeric matrix. The polymeric matrix is a multiphase matrix comprising a first matrix component consisting of a monomer or a dendrimer, and a second matrix component consisting of high molecular weight organic molecules, said second matrix component forming a sticky membrane of the prepreg with an interpenetrating polymer network (IPN) bonding to the first matrix component. Preferably, the prepreg further comprises a third matrix component consisting of high molecular weight organic molecules, said third component being distributed between the fibers.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: March 6, 2001
    Assignee: Stick Tech Oy
    Inventors: Pekka Vallittu, Antti Yli-Urpo, Ilkka Kangasniemi
  • Patent number: 5846640
    Abstract: The invention relates to a method for the preparation of the fibre product pre-impregnated with a polymer (prepreg) where the method includes: a) coating the fibres with a powder comprising at least one polymer and optionally an agent having the ability to initiate the polymerization reaction of the polymer, b) adding to the composition obtained in step a) a solvent possessing the ability to dissolve the polymer but lacking the ability to initiate the polymerization reaction of the polymer, and c) evaporating the solvent. Alternatively, the polymer (optionally including the initiating agent) can first be dissolved in the solvent after which the fibres are contacted with the solution thus obtained and the solvent is evaporated. The surface of the fibres is preferably treated so as to facilitate the bonding of the polymer to the fibres, whereafter the surface treated fibres are coated with the polymer powder.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: December 8, 1998
    Assignee: Bioxid Oy
    Inventor: Pekka Vallittu