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WO2016077903A1 - Bloc pour la production d'éléments de restauration pour prothèse fixe - Google Patents

Bloc pour la production d'éléments de restauration pour prothèse fixe Download PDF

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Publication number
WO2016077903A1
WO2016077903A1 PCT/BR2015/050221 BR2015050221W WO2016077903A1 WO 2016077903 A1 WO2016077903 A1 WO 2016077903A1 BR 2015050221 W BR2015050221 W BR 2015050221W WO 2016077903 A1 WO2016077903 A1 WO 2016077903A1
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WO
WIPO (PCT)
Prior art keywords
zirconia
block
reinforced
restorations
alumina
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Ceased
Application number
PCT/BR2015/050221
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English (en)
Portuguese (pt)
Inventor
Dalton MATOS RODRIGUES
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2016077903A1 publication Critical patent/WO2016077903A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/02—Protective casings, e.g. boxes for instruments; Bags
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/10—Supports for artificial teeth for transport or for comparison of the colour
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry

Definitions

  • This utility patent application refers to a "BLOCK FOR PRODUCTION OF FIXED PROSTHESIS RESTORATION" that was developed to provide a blind hole in the block for installation of the so-called prosthetic component, enabling coupling and subsequent cementation of component.
  • the present invention provides time savings, laboratory work and materials.
  • CAD-CAM refers to the design of a prosthetic structure on a computer (Computer Aided Design) followed by its manufacture by a milling machine (Computer Aided Manufacturing). It is a technology widely used in many industries and due to its introduction in Dentistry, in the late 70's and early 80's of the last century, Bruce Althoffr, USA, Royce Duret, France, and Werner Mormann and Marco Brandestini, in Switzerland. The main objectives of this technology were then to automate a manual process to obtain high quality material, standardize manufacturing processes and reduce production costs. In 1977, Young, Altmaschiner29 presented the idea of using laser holography for intraoral mapping. In 1984 Duretl developed the "Duret System" for making single crowns.
  • CEREC CEramic REConstruction
  • CAD-CAM technology has been used in dentistry mainly in the production of fixed denture restorations such as crowns, bridges and veneers.
  • CAD-CAM systems which are based on three key components: scanning readiness, prosthetic restoration design (CAD) software, and prosthetic framework milling (CAM). ).
  • CAD-CAM systems There are currently two types of CAD-CAM systems depending on the availability of assigning CAD files: open CAD-CAM systems or closed CAD-CAM systems.
  • open CAD-CAM systems open CAD-CAM systems or closed CAD-CAM systems.
  • Closed CAD-CAM systems offer the entire production system.
  • the remaining dental structure cannot have sharp angles.
  • the structures are made of ceramic, and the presence of sharp angles would induce fracture lines of the material.
  • the machining system of the prosthetic part especially the shape of the drill tip and its thickness, cannot reproduce such angles.
  • the ideal finishing line in these systems is the wide bevel or rounded internal angle shoulder.
  • Dental preparation can be digitized outside the oral cavity, on the cast model (changed), or inside the oral cavity, by an intraoral scanning system.
  • intraoral scanning systems still do not allow sufficiently accurate images of spatial relationships, especially when multiple teeth are involved in prosthetic rehabilitation.
  • Tinschert et al. In the current state of CAD-CAM technology, extraoral methods are preferable. However, these methods have some disadvantages, such as the time taken and the fact that they require an impression of dental preparation, which also introduces error factors in this process.
  • the image is transferred to a computer-aided design program, whereby the operator can then virtually design the prosthetic structure.
  • a waxing can be performed, which is then scanned and handled by the software.
  • the finishing lines, spacing and thickness of the restoration to be machined are defined.
  • the materials used for milling the prosthetic structure are prefabricated blocks of the following materials: leucite-reinforced glass ceramics, glass-reinforced alumina, densely sintered alumina, Y-TZP Zirconia (Yttrium-tetragonal polycristal zirconia) with sintering (partial or total), titanium, precious alloys, non-precious alloys and strengthened acrylics.
  • leucite-reinforced glass ceramics glass-reinforced alumina, densely sintered alumina, Y-TZP Zirconia (Yttrium-tetragonal polycristal zirconia) with sintering (partial or total), titanium, precious alloys, non-precious alloys and strengthened acrylics.
  • zirconia is the toughest ceramic available for use in dentistry, which is why it was highlighted in this paper.
  • This material has the potential to allow the construction of bridges in high tension sectors, for example in the posterior areas of the mouth, as it reveals a very high fracture resistance, three to four times higher than the largest masticatory load.
  • Zirconia is an oxidized form of zirconium metal, as alumina refers to aluminum metal.
  • Yttrium oxide is an agent that is added to pure zirconia to provide stability at room temperature and to produce a multiphase material known as yttrium partially stabilized zirconia (Y-TZP).
  • zirconia has a property known as "transformation toughening”: under stress, the material undergoes dimensional change, with volumetric increase of 3 to 4%, generating compression stresses that inhibit the propagation of fracture lines so frequent in ceramics. For this reason, zirconia is known as "Intelligent Ceramics". It is a feature similar to the action of the dentin-junction on the natural tooth. On the other hand, it should also be noted that regarding biocompatibility and aesthetics, zirconia has a higher value compared to metalloceramic restorations. For use in CAD-CAM milling machines, zirconia comes in two forms:
  • Fully sintered zirconia (hard) - implies a long working time (2 to 4 hours for a unit) and heavy wear with drills. According to Luthardt et al., The wear of this zirconia with diamond drills can damage the material, compromising its strength and viability, which is why the author advises the more favorable use of partially sintered zirconia;
  • Partially sintered zirconia (soft zirconia) - allows for easier and faster processing. However, due to its partially sintered condition, it needs 6 to 8 hours in a special ceramic oven to complete sintering. Due to this process, there is a dimensional change that must be compensated during the initial virtual drawing of the structure.
  • the prefabricated blocks are then subjected to a subtractive milling process according to the number of axes (3 to 6 axes), depending on the system in question.
  • the polishing and the individualization of the structures with cosmetic ceramics are required.
  • the CEREC system was the first CAD-CAM system to achieve clinical and commercial success.
  • This system makes an optical reading without contact with the dental preparation.
  • the measurement method used is active triangulation, with a resolution of 25 ⁇ .
  • the generated 3D image is then transferred to a computer on which the The system CAD program allows the structure to be designed.
  • the finishing line is automatically detected and can also be modified manually and is subsequently executed on the same system milling machine (CAM).
  • CAM system milling machine
  • This unit features two diamond drills that cut the frame on four working axes and with a cutting reproducibility of approximately 30 ⁇ 17.
  • the fact that the ceramic block is secured on one side prevents the action of the drill in that area, which is subsequently milled manually.
  • the system allows the production of hoods, incrustations, partial crowns, facets and full crowns for fore and aft regions in a single session.
  • CEREC® currently stands for Chairside Economical Restorations Esthetic Ceramic5.
  • this is the only system that has a version for clinical use (CEREC Chairside®), which makes it very practical and less dependent on laboratory work and can also translate into some financial savings (Economical).
  • CEREC 3D® a version for clinical use
  • CEREC Chairside® Triluxe® ceramic blocks
  • the introduction of CEREC 3D® allows the clinician to capture multiple images more accurately and then create a virtual model, for example for a complete quadrant.
  • Tinschert et al. This technology of the CEREC system is not yet sufficiently accurate to permit its approval to construct fixed prostheses of various elements.
  • Triluxe® is a new three-color ceramic block model that replaces the old mono-chromatic blocks and is reflected in an improved aesthetic potential of the system.
  • CEREC InLab® is a laboratory system whereby the dental preparation plaster model is subjected to a laser scanning, and the computer infrastructure (CAD) was then designed and the ceramic block machined. Once the infrastructure is prepared and verified, the laboratory completes it with cosmetic ceramics.
  • the Procera / AllCeram® system has produced more than 5 million prosthetic units, thus proving to be one of the most successful CAD / CAM systems. Due to this technology, the plaster model is digitized by contact using a Procera® scanner (Piccolo® - for single crowns, veneers and abutments; Forte® - also for 2 to 4 element prostheses). The "digitizing tip" exerts a small pressure of 20 g on the model to ensure accurate contact.
  • the process takes approximately 30 seconds.
  • the scanned image (3D CAD) is then sent to a Procera® processing center (Sweden - Karlskoga and Sweden; U.S. - New Jersey) via a modem connection.
  • replicas of the wider plaster model are made to compensate for the ceramic contraction when sintering.
  • the hoods can then be produced in high purity alumina (0.4 mm thick in cases requiring accurate aesthetics or 0.6 mm in other indications) or zirconium (0.7 mm when higher material strength is required) .
  • the hood is back in the lab to place the ceramics.
  • the strength of the materials used reaches high values, which, in the case of alumina, are 687 MPa and zirconia 1,200 Mpa2.
  • Dental preparation also requires an appropriate technique, with the execution of guidelines cervical finish in broad chamfer, cervical-occlusal stump height of 3 mm and lower pontics there mm, when in alumina.
  • the Lava® system enables the fabrication of front and rear ceramic crowns and bridges.
  • the cervical finishing line of dental preparations may be a bevel or a shoulder with a rounded internal angle.
  • the various finishing lines of dental preparations and the edentulous ridge are digitized by an optical laser that transmits the images to a computer, where the system's assisted design program automatically determines the finishing lines and suggests the pontics. . Due to the shrinkage of the ceramic during sintering, as described in the Procera® system, the infrastructures are designed with a 20% increase in volume.
  • pre-sintered zirconia blocks are used for milling, noting that the system is capable of producing up to 21 hoods or bridge structures without any manual intervention.
  • the zirconia blocks used can be colored with seven shades of color prior to the final sintering, which can give high aesthetic levels.
  • the LAVA® system includes a special high temperature oven.
  • a system that includes a scanning machine, CAD software, a milling machine and a ceramic sintering oven.
  • the plaster (anti-glare) model is digitized by an optical reading through a CCD camera (1: 1 real dimension and 20 ⁇ precision), and the 3D image is created through 15 projection sequences.
  • the prosthetic restoration is then designed in CAD software and then milled using five-axis cutting movements in blocks of various types of materials: partially sintered zirconia - ZS-Blanks; fully sintered zirconia (ZH-Blanks), titanium (Grade 2 - T-Blanks) and leucite-reinforced glass ceramics.
  • the number of axes of the milling unit is one of the parameters that most influences the geometric detail of restorations. Larger number of spindles allow drills to assume more positions according to the block and thus produce greater detail. It should be noted that the way to support the block in CAM units will also influence the number of axes. For example, in the CEREC system, blocks are always held by a support element on one side of the block, which prevents drill action in that zone. The Everest® system introduced the concept of support using acrylic resin, thus allowing complete freedom of movement of the drills around the restoration.
  • the milling machine allows the fabrication of structures with a maximum dimension of 45 mm. Milling of the structures can take 2 to 4 hours for the crown for hard zirconia and about 20 minutes for soft zirconia, with subsequent 8-hour sintering.
  • prefabricated blocks are provided with a blind hole disposed transversely to the fixing pin, the blind hole being formed from a locking cylindrical hole provided with a keyway, followed immediately tapered bore for coupling a prosthetic component (not shown) lower section of the restorative element.
  • Figure 1 shows a perspective view of the block.
  • Figure 2 shows a side view of the block.
  • Figure 3 shows a cross-sectional view of the block alluding to the coupling hole of the prosthetic component.
  • Figure 4 shows a side view of the block alluding to the securing pin.
  • the "FIXED PROSTHESIS RESTORATION BLOCK” is comprised of a single body (1) made up of prefabricated blocks (2) made of leucite-reinforced glass ceramics, glass-reinforced alumina, densely sintered alumina, Y-TZP Zirconia (Yttrium-tetragonal polycristal zirconia) with sintering (partial or total), titanium, precious alloys, non-precious alloys and strength-enhanced acrylics, clamping pin (3) which is inserted into the base of the shaping machine (not shown), characterized in that said prefabricated blocks (2) are provided with a blind hole (4) disposed transversely to the clamping pin (3), being the blind hole (4) formed from a locking cylindrical hole (5) provided with a keyway (6), followed immediately by a conical hole (7) for coupling a prosthetic component (not shown) arranged in the lower section of the restorative element.
  • prefabricated blocks (2) are provided with a blind hole (4) disposed transversely to
  • the "BLOCK FOR PRODUCTION OF FIXED PROSTHESIS RESTORATIONS” has enormous advantages, as the CADEC CAM type block drilling system for coupling and subsequent cementation of prosthetic components. . It consists essentially of making holes for installation of the so-called prosthetic component. The hole is perfectly designed for a perfect fit between the hole and the component. The hole is made in the lower part for fitting the prosthetic component and continues a 2.6 mm hole through which a screw will pass. This system makes it possible to obtain cemented implant restorations performed by the CAD-CAM system.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Preparations (AREA)

Abstract

L'invention, intitulée "Bloc pour la production d'éléments de restauration pour prothèse fixe", consiste en un corps unique formé par des blocs préfabriqués confectionnés en vitrocéramique renforcée de leucite, alumine renforcée de verre, alumine densément frittée, zircone Y-TZP (Yttrium-Tetragonal Zirconia Polycrystal) avec frittage (partiel ou total), titane, alliages précieux, alliages non précieux et acryliques à résistance renforcée, présentant une tige de fixation qui est insérée dans la base de la machine de modelage (non représentée). L'invention se caractérise en ce que lesdits blocs préfabriqués sont dotés d'un trou borgne s'étendant transversalement à la tige de fixation, ce trou borgne, formé à partir d'un trou cylindrique de blocage doté d'un canal à clavette, étant immédiatement suivi d'un trou conique, en vue de l'accouplement d'un élément prothétique (non représenté) se trouvant sur la partie inférieure de l'élément de restauration.
PCT/BR2015/050221 2014-11-18 2015-11-18 Bloc pour la production d'éléments de restauration pour prothèse fixe Ceased WO2016077903A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRBR202014028682-4 2014-11-18
BR202014028682U BR202014028682U2 (pt) 2014-11-18 2014-11-18 bloco para produção de restaurações em prótese fixa

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WO2016077903A1 true WO2016077903A1 (fr) 2016-05-26

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WO (1) WO2016077903A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024250123A1 (fr) * 2023-06-07 2024-12-12 Vargas Valdes Rodrigo Andres Tige métallique de fixation pour blocs dentaires cao/fao c12, c14, c16 ou de toutes les tailles

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615678A (en) * 1984-03-06 1986-10-07 Moermann Werner H Blank from which a dental implant can be machined, and a method of making the blank
US6126445A (en) * 1993-12-23 2000-10-03 Adt Advanced Dental Technologies, Ltd. Implant abutment systems, devices and techniques
US20050008989A1 (en) * 2003-05-19 2005-01-13 Sirona Dental Systems Gmbh Blank-holding means and method of surveying same
US20060106484A1 (en) * 2003-01-02 2006-05-18 Gunter Saliger Method for automatically creating a dental superstructure for joining to an implant
US20060292527A1 (en) * 2003-07-07 2006-12-28 Franz Basler Blank for producing dental shaped parts and method for producing the shaped part
US20070050072A1 (en) * 2005-09-01 2007-03-01 Axel Schwotzer Blank for a dental prosthetic item containing machining information, machining device therefor, and machining method therefor
WO2007025997A1 (fr) * 2005-09-01 2007-03-08 Sirona Dental Systems Gmbh Ebauche pour une partie de rechange comprenant des informations necessaires pour le traitement et procede de fabrication associe
WO2009016223A2 (fr) * 2007-07-31 2009-02-05 Sirona Dental Systems Gmbh Ébauche avec codage, et procédé de fabrication de pièce de dentisterie formée
US20110229857A1 (en) * 2010-03-16 2011-09-22 Sirona Dental Systems Gmbh Blank with coding for the production of tooth-technical shaped parts and procedures for the identification of a blank

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615678A (en) * 1984-03-06 1986-10-07 Moermann Werner H Blank from which a dental implant can be machined, and a method of making the blank
US6126445A (en) * 1993-12-23 2000-10-03 Adt Advanced Dental Technologies, Ltd. Implant abutment systems, devices and techniques
US20060106484A1 (en) * 2003-01-02 2006-05-18 Gunter Saliger Method for automatically creating a dental superstructure for joining to an implant
US20050008989A1 (en) * 2003-05-19 2005-01-13 Sirona Dental Systems Gmbh Blank-holding means and method of surveying same
US20060292527A1 (en) * 2003-07-07 2006-12-28 Franz Basler Blank for producing dental shaped parts and method for producing the shaped part
US20070050072A1 (en) * 2005-09-01 2007-03-01 Axel Schwotzer Blank for a dental prosthetic item containing machining information, machining device therefor, and machining method therefor
WO2007025997A1 (fr) * 2005-09-01 2007-03-08 Sirona Dental Systems Gmbh Ebauche pour une partie de rechange comprenant des informations necessaires pour le traitement et procede de fabrication associe
WO2009016223A2 (fr) * 2007-07-31 2009-02-05 Sirona Dental Systems Gmbh Ébauche avec codage, et procédé de fabrication de pièce de dentisterie formée
US20100297580A1 (en) * 2007-07-31 2010-11-25 Sirona Dental Systems Gmbh Blank with encoding and method of manufacturing a molded dental component
US20110229857A1 (en) * 2010-03-16 2011-09-22 Sirona Dental Systems Gmbh Blank with coding for the production of tooth-technical shaped parts and procedures for the identification of a blank

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"inCoris ZI meso", SIRONA DENTAL CAD/CAM, 2012, pages 5, Retrieved from the Internet <URL:http://manuals.sirona.com/en/digital-dentistry/cad-cam-materials/incoris-zi-meso.html> *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024250123A1 (fr) * 2023-06-07 2024-12-12 Vargas Valdes Rodrigo Andres Tige métallique de fixation pour blocs dentaires cao/fao c12, c14, c16 ou de toutes les tailles

Also Published As

Publication number Publication date
BR202014028682U2 (pt) 2016-05-24

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