30 results about "Orthodontic Adhesives" patented technology

A packaged orthodontic assembly includes a container with a chamber and an orthodontic appliance received in the chamber. A quantity of a first orthodontic adhesive material is applied by the manufacturer to the base of the orthodontic appliance. A second orthodontic adhesive material is also received in the chamber in initially spaced relationship to the first orthodontic adhesive material. The practitioner can elect to bring the first orthodontic adhesive material into contact with the second orthodontic adhesive material when desired.

An orthodontic assembly includes an appliance placement device such as an indirect bonding transfer tray or a jig. A number of orthodontic appliances such as brackets are releasably connected to the placement device. The assembly also includes a dispensing unit that is adapted to receive the placement device and apply a quantity of adhesive to the bases of the appliances simultaneously.

The invention discloses a method and device for generating an indirect orthodontic adhesive transfer tray three-dimensional digital model, relates to the field of digital medical treatment, and aims at solving the problem of an inaccurate orthodontic result. The method comprises the following steps: obtaining original dentition data with radix dentis and skull data; obtaining data feature points; generating a skull side head shadow image according to skull feature points; generating an occlusal surface and teeth arrangement arch wires of upper and lower jaws according to tooth feature points and the skull side head shadow image; generating an oriented bounding box of each tooth according to the tooth feature points; carrying out automatic teeth arrangement according to the oriented bounding box of each tooth and a preset orthodontic rule, and generating expected orthodontic dentition; arranging brackets on the teeth in the expected orthodontic dentition according to the oriented bounding box of each tooth and generating the expected orthodontic dentition with the brackets; and generating the transfer tray three-dimensional digital model according to the expected orthodontic dentition with the brackets. The method and the device disclosed by the invention are mainly applied to the tooth orthodontic process.

A packaged assembly includes a container with a chamber and an orthodontic appliance received in the chamber. The assembly also includes a quantity of orthodontic adhesive material that is received on a release surface in the chamber. The appliance is detachably mounted on a support and is relatively movable when desired in order to bring a base of the appliance into contact with the adhesive material for transfer of the adhesive material to the appliance.

An adhesive system has been developed for orthodontic ceramic brackets which minimizes tooth fracture and makes bracket removal easier and more predictable. The adhesive system makes use of current filled adhesives and a plasticizer (e.g. diethyl phthalate, xylene, etc.). Additions of plasticizer between 10 to 20 weight percent of the adhesive will decrease the adhesion in excess of 50%. This adhesive permits more patient comfort while at the same time allowing for the use of ceramic brackets.

Orthodontic adhesives are claimed which use polymeric filler particles with defined particle size characteristics. The particle size characteristics are controlled such that these adhesives provide comparable mechanical retention and cohesive strength of conventional orthodontic adhesives when used to bond orthodontic appliances to teeth. Because polymeric fillers are generally softer than inorganic fillers, these adhesives are easier to remove from the tooth than conventional adhesives after debonding an orthodontic appliance. Embodiments of the invention include both self-curing and two-part adhesives, packaged adhesive-coated orthodontic appliances, and methods for removing a cured adhesive from a tooth surface.

The present invention belongs to the field of biomedical high-molecular material technology, in the concrete, it relates to a preparation method of visible light solidified orthodontic adhesive containing 4-META functional monomer. Said preparation method includes the following steps: making functional monomer 4-META be added into a liquid active diluting agent, placing them into a constant-temperature drying oven, at the temperature of 40deg.C-80deg.C making 4-META be completely dissolved in said active diluting agent, the added quantity of said active diluting agent is 2-6 times mass of functional monomer 4-META, then adding matrix resin, uniformly stirring them, the added quantity of said matrix resin is 0.8-9 times mass of the obtained mixture, then adding photosensitizer and organic amine activating agent, uniformly stirring them to obtain adhesive primer, adding inorganic filler in said adhesive primer, unifor54mly stirring them so as to obtain the invented adhesive paste agent.

Containers for photocurable materials are made of a polymer and metallic particles. The containers are particularly useful for storing materials having dyes that are highly sensitive to light. The containers are especially useful for storing dental materials such as orthodontic adhesives, including adhesives in syringes and cartridges as well as adhesives that are precoated onto the base of an orthodontic appliance.

An orthodontic adhesive includes components capable of allowing easy debonding of an orthodontic device from a patient's tooth. The adhesive includes an engineered marine mussel protein. The adhesive may include at least one photocleavable moiety. The adhesive is applied in one or more individual layers. One of the components of the adhesive is capable of binding to a tooth and the other component may be capable of binding to an orthodontic device. A method of adhering an orthodontic device to a tooth includes applying a layer of an orthodontic adhesive to either the tooth or the orthodontic device or the tooth and the orthodontic device and affixing the orthodontic device to the tooth with the orthodontic adhesive situated between the tooth and the orthodontic device. The engineered marine mussel protein includes one or more catechol moieties or one or more derivatives of a catechol moiety.

An orthodontic adhesive includes a curable resin monomer component; a quaternary curing initiator system; and filler. Another orthodontic adhesive having a W/C ratio (working time to curing time ratio) of at least 10, 12, 14 or 20, includes a curable resin monomer component; a curing initiator system; and filler. The adhesives are suitable as light-curing and may include a colorant. Suitable colorants include reversible, thermochromic dyes. The adhesive may also include a resin toughening component.

The invention discloses an orthodontic adhesive and a preparation method thereof. The adhesive is prepared from the following components in parts by weight: 19-37 parts of epoxy resin, 5-16 parts of polymethacrylate, 3-8 parts of n-butyl acrylate, 12-19 parts of carboxymethylcellulose, 5-15 parts of dibutyl phthalate, 32-43 parts of glycerinum, 3-10 parts of a coupling agent, 12-25 parts of dibutene and 6-21 parts of hydroxyapatite. The prepared adhesive is high in bonding strength and high in stretchability, does not generate an allergic symptom and can be widely applied to clinical treatment.

The present invention provides a method of identifying an orthodontic adhesive on a tooth structure, the method including selectively staining a surface including the orthodontic adhesive or the tooth structure. Methods of bonding and debonding an orthodontic appliance to and from a tooth structure are also provided.

A metal base member and a thin layer of an orthodontic adhesive is used to rigidly secure said base member directly to a tooth; a layer of lead-free heat softenable material for joining two metal surfaces rigidly together and an orthodontic bracket having a face to fit within a surface area of the base member and an engagement receiver for an archwire by which forces are developed in a patient's mouth. In addition, the base member overlaps the base of the bracket by up to about 1.0 mm surrounding the base so that the bracket can be adjusted by an amount of up to about 1.0 mm in all directions around the base member without overlapping the periphery of the base member.

Described herein is a new initiator system for initiating radical polymerization of ethylenically unsaturated monomers. The initiator system comprises an organic compound having N-charged moiety in combination with an organic thiol compounds. The initiator system demonstrates better stability and is suitable for use in the field of a dentistry in formulated dual cure compositions, such as a resin modified glass ionomers, a cement, an orthodontic adhesive, and composite formulations.

Three adhesives formulated with Trimethylolpropane Trimethacrylate (TMPTMA) that do not contain BisGMA were developed, whereby the mutagenic and teratogenic risk by the release of bisphenol A is eliminated, and presented a better performance compared to the three commercial adhesives prepared with BisGMA (Adhesive A, Adhesive C and Adhesive B). The invention provides an adhesive used in one-step and provides a system which is formed by a primer and a slurry. The adhesives of the invention were compared with two commercial controls. They were physically characterized by assessing: hardening time, adhesion stress, elastic modulus, sorption and solubility at different pHs (6.8 and 7.7); by the obtained values premature detachments, white lesions below the appliance and microfiltration are avoided; its fluidity, film thickness were evaluated and were compared with those obtained from the three commercial adhesives. Storage stability and thermogravimetric analysis were assessed. The prepared adhesives with TMPTMA are photopolymerizables, thereby providing enough time to the operator to place the appliance in proper position, it is easy to handle, capable of supporting orthodontic biomechanics, has low elastic modulus, enables transitions of heavy arches reducing the risk of involuntary detachment of the appliances, have low viscosity, penetrates on both the brace retentions as those made with acid etching on enamel surface. Presenting adhesion to both the base of the attachments as well as to the enamel, its film thickness is minimal and does not alter the prescription system. When the appliance is removed at the end of the treatment, it does not cause structural damage to the enamel because the adhesive remains on the enamel and can be removed easily with a rotary instrument.