A dental model, includes (a) an upper segment, the upper segment having a shape corresponding to at least a portion of a dental arch of a human patient; (b) a base segment having an external surface and a bottom surface; (c) at least one internal cavity formed in the base segment, and optionally the upper segment, the at least one internal cavity extending through the bottom surface; and (d) at least one wash channel extending from the external surface of the base segment through the base segment and into the at least one internal cavity.

A system includes a heating section configured to heat a sheet of plastic to generate a heated sheet of plastic. The system includes a plate configured to secure a mold associated with a dental arch of a patient. The plate includes a locking mechanism. The mold includes feature configured to interface with the locking mechanism. The system further includes a thermoforming chamber configured to thermoform the heated sheet of plastic to the mold that is secured to the plate via an interface of the locking mechanism with the feature to generate a thermoformed sheet of plastic. The locking mechanism is configured to extend through the mold and overlap an upper surface of the mold to lock the mold in a z-direction that is orthogonal to a plane defined by the plate. The system further includes a cutting tool configured to trim an aligner from the thermoformed sheet of plastic.

The present disclosure provides methods, computing device readable medium, devices, and systems having a dental attachment placement structure. One dental attachment placement apparatus includes a body having an attachment placement surface that is to be placed on an attachment affixing surface of a tooth and wherein the attachment placement surface includes a portion that is shaped to allow placement of an attachment at a particular position on the affixing surface of the tooth and a portion of the body having a contour that is shaped to correspond with a contour of an alignment surface of a tooth and when the contour of the body and the corresponding contour is aligned, the attachment is located at the particular position and can be secured to the affixing surface of the tooth.

Provided herein is a method of recycling additively manufactured articles or recovered coating material that comprises a crosslinked polymer formed from a single-cure resin comprising a reactive blocked prepolymer, into a regenerated resin useful for additive manufacturing. Recyclable light-polymerizable resins, methods of making recyclable objects from such resins, and methods for sustainable manufacturing are also provided.

The present disclosure provides methods, computing device readable medium, devices, and systems having a dental attachment placement structure. One dental attachment placement apparatus includes a body having an attachment placement surface that is to be placed on an attachment affixing surface of a tooth and wherein the attachment placement surface includes a portion that is shaped to allow placement of an attachment at a particular position on the affixing surface of the tooth and a portion of the body having a contour that is shaped to correspond with a contour of an alignment surface of a tooth and when the contour of the body and the corresponding contour is aligned, the attachment is located at the particular position and can be secured to the affixing surface of the tooth.

The example systems, methods, and/or computer-readable media described herein help with design of highly accurate models of un-erupted or partially erupted teeth and help fabricate of aligners for un-erupted or partially erupted teeth. Automated agents that use machine learning models to parametrically represent three-dimensional (3d) virtual representations of teeth as 3D descriptors in a 3D descriptor space are provided herein. In some implementations, the automated agents described herein provide instructions to fabricate aligners for at least partially un-erupted teeth using representative 3D descriptor(s) of a tooth type.

The present invention provides a photocurable resin composition that has good fabricability, and that exhibits superior flexibility, fracture resistance, and water resistance in the form of a cured product. The present invention relates to a photocurable resin composition comprising: a urethanized (meth)acrylic compound (A); a mono(meth)acrylic acid ester compound (B) containing no urethane bond; and a photopolymerization initiator (C), the urethanized (meth)acrylic compound (A) being a (meth)acrylate comprising, per molecule, at least one kind of structure selected from the group consisting of a polyester, a polycarbonate, a polyurethane, a polyether, a poly-conjugated diene, and a hydrogenated poly-conjugated diene; and a urethane bond, the mono(meth)acrylic acid ester compound (B) containing no urethane bond comprising at least one selected from the group consisting of a mono(meth)acrylic acid ester compound (b-I) represented by general formula (I), and a mono(meth)acrylic acid ester compound (b-II) represented by general formula (II).

Dental attachment placement apparatuses with one or more replacement attachment systems for providing one or more replacement dental attachments. The replacement attachment systems may include a body that is configured to orient and align the apparatus with respect to the teeth. The apparatus may include one or more primary dental attachments coupled to the body, where the body is configured to position the primary dental attachments adjacent to the teeth for bonding. The replacement system can be configured to replace the primary dental attachments and align replacement dental attachments with respect to the teeth.

The invention is directed to a method for additively manufacturing of a three-dimensional product using top-down stereolithography, wherein flowable, photopolymerizable material in a vat (50) is solidified in a locally selective manner by exposure from above, characterized in that a pressurized gas jet is directed to the surface of the photopolymerizable material, which pressurized gas jet is ejected by a pressurized gas nozzle of a blower (2) which is movable above the liquid level in the vat, wherein the pressurized gas jet is extensive in a direction transverse to the moving direction of the blower, and that by moving the blower with its pressurized gas nozzle across areas of the material surface to be solidify and acts on the surface in this manner, to smooth and level the surface. With such a method multi-component products may be built in which products a further component has to be built attached to an already existing component which (partially) protrude over the liquid level in the vat.

The invention relates to a method for producing a denture, characterized by a) providing a predefined dental arch database, the dental arch database having data on maxilla and mandible arches in occlusion; b) generating the denture on the basis of the dental arch data on the maxilla and mandible arches in occlusion.