Abstract: Dental article for preparing a dental impression comprising (i) a first paste composition, and (ii) a second paste composition reactive upon mixing with the first paste composition in a curing reaction, characterized in that the dental article is obtainable by forming a predetermined amount of the first paste composition and a predetermined amount of the second paste composition into a body wherein the first and second paste compositions are separated by an interface preventing mixing and curing of the first paste composition and the second past composition during storage of the dental article.

Abstract: Exemplary embodiments relate to a dental abutment and methods of forming the same. The abutment (19) may include a head portion (27) located at an upper end of the abutment and constructed to support a prosthetic tooth replacement and soft tissue adjacent the head portion, an anti-rotation feature (25) located at a lower end of the abutment and constructed to mate with a dental implant, and a fillet (21) located at an interface between the head portion and the anti-rotation feature. The fillet may reduce a risk of fracture at the interface between the head portion and the anti-rotation feature. In some examples, the abutment may be formed at least partially of a ceramic material.

Abstract: The orthodontic alignment of misaligned teeth includes preparing a digital and/or physical overlay model which is the superimposed positioning of the patient's original misaligned dentition with the target or final position. The superimposition of one upon the other creates an open space through which teeth may move in a natural manner, allowing for a treatment plan that takes into account the physical interaction of one tooth with another or the differences in tooth movement rates due in part to differences in underlying bone density or the like. An aligner tray fabricated using the model will likewise represent the before and after tooth positions and will also have the open space to allow tooth movement. Force exerting structures are preferably placed into the aligner tray to impinge upon the patient's teeth in a prescribed manner when the aligner tray is inserted into the patient's oral cavity.

Abstract: One-part self-etching, self-priming dental adhesive composition having a pH of at most 2, which comprises (a) a polymerizable acidic phosphoric acid ester monomer (b) one or more polymerizable acidic monomers (c) a polymerizable N-substituted alkylacrylic or acrylic acid amide monomer; (d) optionally an organic and/or inorganic acid; (e) an organic water soluble solvent and/or water; and (f) polymerization initiator, inhibitor and stabilizer.

Abstract: A dental, paste/paste self-adhesive cement includes a polymerizable acidic monomer or monomer mixtures; a polymerizable non-acidic monomer or monomer mixtures, a photo-initiator and/or a co-initiator, a reducing agent such as a benzoylthiourea and other substituted benzoylthiourea, an oxidizing agent, a thermal stabilizer and a glass filler.

Abstract: A light-curable dental material is provided, comprising a polymerizable compound having at least one ethylenically unsaturated bond, a photopolymerization initiator for polymerizing said polymerizable compound, and a 1,3-dipolar compound as a polymerization inhibitor.

Abstract: The invention provides a high strength dental composition including polymerizable dental resins. The dental composition is useful as restorative material and for making various dental devices, such as artificial teeth, crowns and bridges of high strength dental polymeric material.

Abstract: The invention relates to light-curable dental materials comprising at least one polymerizable compound having at least one ethylenically unsaturated bond and a hexaarylbisimidazole, e.g. as a photopolymerization initiator. The invention also relates to the use of a hexaarylbisimidazole polymerization initiator in light curable dental materials and also to cured dental materials obtainable by light-curing the light-curable dental materials of the invention.

Abstract: A temporary root canal sealer dispersion having a pH of at least 9 and comprising: (i) an aqueous dispersion medium comprising an oligomer and/or polymer having Lewis basic groups, and optionally a hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal, and (ii) a dispersed phase comprising a radio-opaque filler, wherein the weight ratio of oligomer and/or polymer having Lewis basic groups to hydroxide of an alkali metal and/or hydroxide of an alkaline earth metal is at least 0.5 when said aqueous dispersion medium comprises a hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal.

Abstract: An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.

Abstract: A composition of macrocyclic oligomer with at least one (meth)acrylate polymerizable group. A method includes preparing an activated precursor of an oligomer at pseudo high-dilution conditions. A method also includes preparing an activated precursor of an oligomer by reacting the precursor with an activated coupling agent, wherein the precursor is condensable and polymerizable.

Abstract: A dental prophylaxis angle and handpiece assembly for cleaning and polishing teeth is provided. The dental prophylaxis angle is removably attached to the dental handpiece by an interlocking mechanism that includes extension locking tabs, a locking annular member, and an interlocking drive member in the handpiece. The prophy angle is securely snap-fitted onto the handpiece and locked in place so that it has minimal lateral movement. After the prophy angle has been used to treat a patient, it can be removed easily from the handpiece and disposed thereof.

Abstract: The present invention provides a system for the endodontic treatment of a root canal, comprising (i) an endodontic instrument; (ii) an endodontic handpiece having a drive motor for rotating the endodontic instrument releasably attached to the handpiece; (iii) a control unit for controlling the rotation of the endodontic instrument according to one or more predetermined rotational sequences; the rotational sequences comprising reciprocating the endodontic instrument by continuously sequentially rotating the endodontic instrument in a first direction followed by reversing the direction of rotation so that 0.5×???<? and 3??/??20, wherein ? represents a rotational angle in a direction in which the rotating endodontic instrument removes debris from the root canal, ? represents a rotational angle in the opposite direction, and ? represents the elastic angle of the endodontic instrument at which plastic deformation occurs in the direction of ?.

Abstract: A container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43° C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.

Abstract: A tip (10) for mixing a plurality of components and for dispensing the mixture. The tip is particularly suited for use with a bulk supply of the components (11). The tip is further particularly suited for the mixing and dispensing of reactive materials. The tip (10) includes a housing (32) having a stator (31) positioned therein. The housing (32) includes a plurality of feeder channels (20, 21) that correspond to outlet channels of the bulk storage device. At least one of the feeder channels (20, 21) has a length dimension such that it extends into the outlet channel of the bulk storage device to prevent cross-contamination of the components held within the bulk storage device.

Abstract: A composition of macrocyclic oligomer with at least one (meth)acrylate polymerizable group. A method includes preparing an activated precursor of an oligomer at pseudo high-dilution conditions. A method also includes preparing an activated precursor of an oligomer by reacting the precursor with an activated coupling agent, wherein the precursor is condensable and polymerizable.

Abstract: The present invention provides a plastic tray orthodontic device (11) which may have embedded activators (10) and which is provided with an over-shell (12). The over-shell (12) acts as a force module.

Abstract: A pontic having a prefabricated notch, channel or slot to physically engage and ensure a secure mechanical lock with the dental appliance. The invention also pertains to a method of fabricating a dental appliance and a kit for facilitating the same. The invention has particular application to thermoformed, removable appliances.

Abstract: An integrated dental porcelain system for making dental prostheses and restorations is provided. The system includes three universal major components: a) opaque porcelain composition; b) pressable dentin ingot; and c) veneering porcelain composition that can be used interchangeably for making restorations. Techniques for making the prostheses and restorations include porcelain fused-to-metal (PFM), press-to-metal (PTM), and either pressed and/or machined all-ceramic methods. The system uses both a hand-layering of veneering porcelain (PFM technique) and a hot-pressing process (PTM and all-ceramic technique) to fabricate the prostheses and restorations.