Provided herein is a method of making a flexible partial denture, which may include: (a) producing a partial denture base by additive manufacturing (e.g., bottom-up or top-down stereolithography) from a dual cure resin, with the dual cure resin comprising a light polymerizable component and a heat polymerizable component, with the denture base including at least one tooth socket; (b) inserting an acrylic artificial tooth into each at least one tooth socket to produce an assembled intermediate product; and then (c) baking said assembled intermediate product for a time sufficient to cure said heat polymerizable component in said denture base and retained dual cure resin, bond said tooth into each at least one socket with said retained dual cure resin, and produce said flexible partial denture. A flexible partial denture produced and resin formulations useful for the same are also provided.

A system (1) for washing a 3D-printed object (4). The system (1) has a washing device (2) and a workpiece (3) that includes the 3D-printed object (4). The washing device (2) has a container (7) that forms a process chamber (8) for receiving a liquid cleaning agent (9), and the container (7) has an inlet (10) into the process chamber (8). The workpiece (3) further has a support structure (6) that supports the 3D-printed object (4) and a base (5) supporting the support structure (6). The base (5), in a mating relationship with the inlet (10), forms a restraint preventing the workpiece (3) from passing through the inlet (10) in a situation in which the workpiece (3) is placed with the 3D-printed object (4) located within the process chamber (8).

A system for correcting class III malocclusions is disclosed. The system may include a maxilla appliance having tooth receiving cavities shaped to receive teeth of the maxilla and a first coupling for receiving an elastic. The system may also include a mandibular appliance having tooth receiving cavities shaped to receive teeth of the mandible. In some embodiments, the system includes a class III corrective appliance having a first mount shaped to engage with the mandibular arch of the patient and having a second coupling shaped to receive the elastic.

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.

Improved separator film compositions, methods and systems for use in producing thermoformed dental appliances are disclosed.

Polymeric shells which fit over one or more natural teeth to change the perceived color of the teeth, and optionally to provide orthodontic support. The shells can be prepared by thermoforming selected polymeric sheets which contain optical additives over a physical image of the teeth, or by depositing polymeric compositions containing optical additives over a physical image of the teeth, or by additive manufacturing based upon a digital image of the teeth. The optical additives cause the combination of the shell and the teeth to have a desired appearance. At least part of the shell preferably has transparency greater than 75%, particularly greater than 85%.

An extendible or adjustable length level is provided. The level includes a locking mechanism allowing the user to fix the level at a selected or desired level. The locking system allows the user to lock the level at the desired length and provides more effective and robust locking than conventional expanding levels. In some embodiments, the locking mechanism is designed such that translational movement of the user-actuated control (as opposed to rotational motion) is used to move the locking mechanism into the locked position.

The present invention relates to a stereolithography method, comprising the steps of receiving a light-curing suspension (100) comprising filler particles (103) in a tray (105); adjusting the light-curing suspension by means of a build platform (107) to a layer thickness with respect to a bottom (109) of the tray (105) which is less than the diameter of the filler particles (103); and selectively curing the adjusted layer thickness of the suspension by means of light.

A photocurable composition, wherein: in a case in which a rectangular sheet-like test piece P1 is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 11 mJ/cm.sup.2 to form a cured layer P1 with a thickness of 50 μm, the cured layer P1 is stacked in a thickness direction thereof to form the rectangular sheet-like modeling product P1 with a length of 40 mm, a width of 10 mm, and a thickness of 0.5 mm, and the modeling product P1 is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 3 J/cm.sup.2 to produce the test piece P1, the storage modulus at 135° C. of the test piece P1 is 3.0×10.sup.8 Pa or more.

A cartridge (1) for a 3D printer, wherein the cartridge (1) has a nozzle or is designed in such a way that a predefined nozzle can be formed in the cartridge (1). The cartridge (1) contains a dental composite material, and the dental composite material comprises a curable, in particular a light-hardenable, matrix and only fillers having a maximum particle size of <5 μm. The dental composite material has a viscosity, in a non-cured state, in the range of 1 to 10,000 Pa*s, preferably 10 to 2,000 Pa*s, more preferably between 50 to 800 Pa*s.