Patents Assigned to Stick Tech Oy
  • Patent number: 8785513
    Abstract: The present invention relates to fiber-reinforced composites, particularly application-oriented composites useful in dental and medical applications/appliances, such as fiber reinforced dental composites, and to a method for the manufacture thereof. Particularly the invention concerns random glass fiber-reinforced restorative composite resins with semi-interpenetrating polymer network matrix and their use in dental applications like cavity fillings, core composites, provisional and semi-permanent crown and bridge composite, cements and adhesives.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: July 22, 2014
    Assignee: Stick Tech Oy
    Inventors: Lippo V. J. Lassila, Pekka K. Vallittu, Sufyan Garoushi, Karri Airola
  • Publication number: 20090258965
    Abstract: The present invention relates to fiber-reinforced composites, particularly application-oriented composites useful in dental and medical applications/appliances, such as fiber reinforced dental composites, and to a method for the manufacture thereof. Particularly the invention concerns random glass fiber-reinforced restorative composite resins with semi-interpenetrating polymer network matrix and their use in dental applications like cavity fillings, core composites, provisional and semi-permanent crown and bridge composite, cements and adhesives.
    Type: Application
    Filed: June 29, 2007
    Publication date: October 15, 2009
    Applicant: STICK TECH OY
    Inventors: Lippo V.J. Lassila, Pekka K. Vallittu, Sufyan Garoushi, Karri Airola
  • Patent number: 7435764
    Abstract: The invention relates to a prepreg comprising a base part, said base part comprising fibers and a matrix, said matrix being at least partially uncured. The prepreg is characterized in that it further comprises a surface part consisting essentially of bioactive filler material, said bioactive filler material being in particle form and at least partially and at most partially embedded in said base part. The invention also relates to a composite obtainable by curing said prepreg. The invention further relates to a mineralizing sheet for treatment of hypersensitive teeth and to the use of said prepreg and composite.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: October 14, 2008
    Assignee: Stick Tech Oy
    Inventors: Pekka Vallittu, Antti Yli-Urpo, Lippo Lassila, Timo Närhi, Tuomas Waltimo
  • Patent number: 7354969
    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: Grant
    Filed: February 6, 2002
    Date of Patent: April 8, 2008
    Assignee: Stick Tech OY
    Inventors: Pekka Vallittu, Lippo Lassila, Mikael Skrifvars, Eeva Viljanen, Antti Yli-Urpo
  • Patent number: 7235290
    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: Grant
    Filed: June 12, 2002
    Date of Patent: June 26, 2007
    Assignee: Stick Tech Oy
    Inventors: Pekka Vallittu, Lippo Lassila, Antti Yli-Urpo
  • 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
  • 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
  • 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
  • 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: 6116901
    Abstract: A device for use particularly in reinforcement of teeth or dental prosthetic devices, where the device is used for wetting and for application of a reinforcing fiber bundle. The device includes a flexible pipe through the first end of which the reinforcing fiber bundle can be inserted and through the second end of which the reinforcing fiber bundle can be removed, where the wall of the pipe is treated so as to be essentially opaque to light intended for the curing of the reinforced fiber bundle, and a nozzle arranged at the second end of the pipe, the cross-section of the nozzle being smaller than the cross-section of the pipe.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: September 12, 2000
    Assignee: Stick Tech Oy
    Inventor: Ilkka Kangasniemi