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).
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Publication number: 20240041703Abstract: The present invention relates to a kit for dental restoration, comprising an aqueous activation agent solution comprising polyacrylic acid having a molecular weight of 100000-1000000 g/mol, wherein the concentration of the polyacrylic acid in the solution is 1-30 mg/l; and a lining material comprising 20-80 wt-% of a dental resin and 20-wt-% of an ion releasing material, which ion releasing material comprises at least one of calcium, phosphate and zinc, based on the total weight of the lining material.Type: ApplicationFiled: November 9, 2021Publication date: February 8, 2024Inventors: Lippo Lassila, Sufyan Garoushi, Pekka Vallittu, Eija Säilynoja
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Publication number: 20220273523Abstract: The invention relates to a dental material comprising a polymer resin, particulate fillers and randomly oriented inorganic fibres, wherein an average largest dimension of the particulate fillers is 0.3-1.2 ?m, the inorganic fibres have a diameter of 4-8 micrometre and an aspect ratio of 20-80 based on an average length of the inorganic fibres and the dental material is void of other fibres. Additionally, the total amount of particulate fillers and inorganic fibres is 70-85 wt-% of the total weight of the material, and the amount of inorganic fibres is 20-35 wt-% of the total amount of particulate fillers and inorganic fibres.Type: ApplicationFiled: July 23, 2020Publication date: September 1, 2022Applicant: Stick Tech OyInventors: Lippo LASSILA, Sufyan GAROUSHI, Pekka VALLITTU, Eija SAILYNOJA
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Publication number: 20210315780Abstract: A dental composition comprising 10-50 wt-% of a methacrylate-based first matrix component, a polymerisation system and as a second matrix component 1-50 wt-% of a compound having a general formula (I).Type: ApplicationFiled: August 1, 2019Publication date: October 14, 2021Inventors: Lippo Lassila, Pekka Vallittu, Sufyan Garoushi, Eija Säilynoja, Jingwei He
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Patent number: 11013603Abstract: An implant having a surface layer consisting of fibres and a matrix, having a first surface opposite to a second surface, and having a thickness that is at most 5% of the largest dimension of the surface layer; a porous biodegradable part having a first surface and opposite to a second surface, where its first surface is attached to the surface layer's second surface and having a thickness of 1-8 mm; and a collagen membrane layer having a first surface opposite to a second surface, where its first surface is attached to the porous part's second surface without covering the porous part's edges; and where the porous part comprises material selected from the group consisting of bioactive glass, bioactive ceramic, hydroxyapatite, tricalciumphosphate and mixtures thereof.Type: GrantFiled: July 1, 2016Date of Patent: May 25, 2021Assignee: Skulle Implants OyInventor: Pekka Vallittu
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Publication number: 20180200064Abstract: The present invention relates to an implant consisting of a surface layer consisting of fibres and a matrix, having a first surface and a second surface opposite each other, and having a thickness that is at most 5% of the largest dimension of said surface layer; a porous biodegradable part having a first surface and a second surface opposite each other, wherein its first surface is attached to the second surface of the surface layer and having a thickness of 1-8 mm; and a membrane layer made of collage having a first surface and a second surface opposite each other, wherein its first surface is attached to the second surface of the porous part without covering the edges of the porous part; wherein its first surface is attached to the second surface of the porous part wherein the porous part comprises material selected from the group consisting of bioactive glass, bioactive ceramic, hydroxyapatite, tricalciumphosphate and mixtures thereof.Type: ApplicationFiled: July 1, 2016Publication date: July 19, 2018Applicant: Skulle Implants OyInventor: Pekka VALLITTU
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Publication number: 20160243283Abstract: A method of coating a surface according to the present invention comprises the steps of abrading the surface to be coated with particles, then arranging a composite structure comprising a layer fibre fabric, a fibre bundle applied according to a pattern and particles of bioactive material in between the fibre bundles pattern, and a second fibre fabric. The method and coated implants manufactured by the method provide implants with good load bearing capabilities for use for example in hip implants.Type: ApplicationFiled: August 27, 2014Publication date: August 25, 2016Applicant: Skulle Implants OyInventors: Olli KARHI, Pekka VALLITTU, Juha-Pekka NUUTINEN
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Patent number: 9144630Abstract: The present invention relates to a composite comprising a structural part, a porous part, and at least two interconnecting parts arranged at a distance from each other and extending from the structural part to the porous part, thus connecting them to each other. The implant is characterized in that each interconnecting part is in the form of a band having a length, a width and a height, the width and the height both being independently at most 20% of the length of the band, and in that at least one of the interconnecting parts is at least partially embedded into the structural and porous parts.Type: GrantFiled: January 29, 2010Date of Patent: September 29, 2015Assignee: Skulle Implants OyInventors: Pekka Vallittu, Kalle Aitasalo, Matti Peltola, Lippo Lassila, Sari Tuusa, Toini Peltola
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Patent number: 9084844Abstract: The present invention relates to an implant comprising at least two layers made of fibers and bioactive material arranged between said at least two layers, the bioactive material being selected from the group consisting of bioactive glass, hydroxyapatite, tricalciumphosphate and mixtures thereof. In the implant, at least one of the layers is at least mainly formed of a mesh, which is made of glass fibers having a diameter of 3-100 ?m, and wherein the mesh size is selected such that the bioactive material is retained within the implant. In addition, the layers are embedded in a matrix made of a resin selected from the group consisting of polyesters, epoxies, acrylates and mixtures thereof, and the layers are attached to each other along the contour of the implant.Type: GrantFiled: May 28, 2013Date of Patent: July 21, 2015Assignee: Skulle Implants OyInventor: Pekka Vallittu
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Patent number: 9078954Abstract: The invention relates to a filler granule comprising a matrix component (1), at least two base particles (2) that are at least mostly embedded in the matrix component, and a fibrous component (3). The fibrous component is attached to at least one of the base particles. The invention also relates to uses of these filler granules as well as to composite materials containing them.Type: GrantFiled: February 11, 2013Date of Patent: July 14, 2015Assignee: POBI CONCEPT OYInventors: Mervi Puska, Allan Aho, Pekka Vallittu
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Publication number: 20150032224Abstract: The present invention relates to an implant comprising at least two layers made of fibers and bioactive material arranged between said at least two layers, the bioactive material being selected from the group consisting of bioactive glass, hydroxyapatite, tricalciumphosphate and mixtures thereof. In the implant, at least one of the layers is at least mainly formed of a mesh, which is made of glass fibers having a diameter of 3-100 ?m, and wherein the mesh size is selected such that the bioactive material is retained within the implant. In addition, the layers are embedded in a matrix made of a resin selected from the group consisting of polyesters, epoxies, acrylates and mixtures thereof, and the layers are attached to each other along the contour of the implant.Type: ApplicationFiled: May 28, 2013Publication date: January 29, 2015Applicant: SKULLE IMPLANTS OYInventor: Pekka Vallittu
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Patent number: 8864825Abstract: The present invention relates to an implant system comprising implantable material in at least partially uncured form, contained in a closed casing, under vacuum and sterilized, and a closed bag containing the casing. The system is characterized in that at least 5% of the surface of the casing comprises sheet-like material having a thickness of 0.05-5 mm and having an original form, the sheet-like material being selected from the group consisting of metallic materials, polymers, bioceramic materials and composites thereof, provided that the material, once deformed from its original form to a changed form, is capable of maintaining that changed form unless subjected to external forces.Type: GrantFiled: December 10, 2010Date of Patent: October 21, 2014Assignee: Skulle Implants OyInventor: Pekka Vallittu
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Publication number: 20130230563Abstract: The invention relates to a filler granule comprising a matrix component (1), at least two base particles (2) that are at least mostly embedded in the matrix component, and a fibrous component (3). The fibrous component is attached to at least one of the base particles. The invention also relates to uses of these filler granules as well as to composite materials containing them.Type: ApplicationFiled: February 11, 2013Publication date: September 5, 2013Applicant: Pobi Concept OyInventors: Mervi Puska, Allan Aho, Pekka Vallittu
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Publication number: 20120277743Abstract: The present invention relates to an implant system comprising implantable material in at least partially uncured form, contained in a closed casing, under vacuum and sterilised, and a closed bag containing the casing. The system is characterised in that at least 5% of the surface of the casing comprises sheet-like material having a thickness of 0.05-5 mm and having an original form, the sheet-like material being selected from the group consisting of metallic materials, polymers, bioceramic materials and composites thereof, provided that the material, once deformed from its original form to a changed form, is capable of maintaining that changed form unless subjected to external forces.Type: ApplicationFiled: December 10, 2010Publication date: November 1, 2012Inventor: Pekka Vallittu
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Publication number: 20120089237Abstract: The present invention relates to a composite comprising a structural part, a porous part, and at least two interconnecting parts arranged at a distance from each other and extending from the structural part to the porous part, thus connecting them to each other. The implant is characterised in that each interconnecting part is in the form of a band having a length, a width and a height, the width and the height both being independently at most 20% of the length of the band, and in that at least one of the interconnecting parts is at least partially embedded into the structural and porous parts.Type: ApplicationFiled: January 29, 2010Publication date: April 12, 2012Inventors: Pekka Vallittu, Kalle Aitasalo, Matti Peltola, Lippo Lassila, Sari Tuusa
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Publication number: 20090176192Abstract: A matrix band which includes fibers and a matrix, at least a portion of the matrix being at least partially uncured. The invention further relates to a dental restoration kit, a prepreg and the use of the matrix.Type: ApplicationFiled: July 3, 2008Publication date: July 9, 2009Inventors: Pekka VALLITTU, Lippo Lassila, Antti Yli-Urpo, Arzu Tezvergil
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Patent number: 7435764Abstract: 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: GrantFiled: May 21, 2004Date of Patent: October 14, 2008Assignee: Stick Tech OyInventors: Pekka Vallittu, Antti Yli-Urpo, Lippo Lassila, Timo Närhi, Tuomas Waltimo
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Patent number: 7354969Abstract: 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: GrantFiled: February 6, 2002Date of Patent: April 8, 2008Assignee: Stick Tech OYInventors: Pekka Vallittu, Lippo Lassila, Mikael Skrifvars, Eeva Viljanen, Antti Yli-Urpo
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Publication number: 20080065123Abstract: The invention relates to a multilayer material comprising at least two layers of web and at least one layer of particles, said particles being arranged between said at least two layers of web. According to the invention at least a part of said multilayer material is made of bioactive glass and said particles are sol-gel derived silica particles. The invention also relates to different uses of said multilayer material.Type: ApplicationFiled: June 29, 2005Publication date: March 13, 2008Inventors: Antti Yli-Urpo, Heimo Ylanen, Joni Korventausta, Hanna Arstila, Timo Narhi, Mikko Hupa, Pekka Vallittu
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Patent number: 7235290Abstract: 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: GrantFiled: June 12, 2002Date of Patent: June 26, 2007Assignee: Stick Tech OyInventors: Pekka Vallittu, Lippo Lassila, Antti Yli-Urpo
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Publication number: 20070054244Abstract: 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: ApplicationFiled: May 21, 2004Publication date: March 8, 2007Inventors: Pekka Vallittu, Antti Yli-Urpo, Lippo Lassila, Timo Narhi, Tuomas Waltimo