A system and a method allow for the removal of excess material from a dental appliance. The system includes at least one 5-axis computer numerical control (CNC) machine and at least one administrative computing system. The administrative computing system is used to determine the trim line for the dental appliance. The administrative computing system is also used to determine a tool path for an automated tool that is an integrated part of the 5-axis CNC machine. The tool path is then relayed from the administrative computing system to the 5-axis CNC machine. The 5-axis CNC machine is used to machine off the excess material from the dental appliance along the trim line, while the automated tool follows the tool path.

A system and method include digitally determining a virtual insertion path of a digital dental restoration,

Disclosed are example embodiments of methods and systems for identifying and quantifying manufacturing defects of a manufactured dental prosthesis. Certain embodiments of the system for performing quality control on manufactured dental prostheses includes: an analysis module to best fit a scanned 3D data model of a manufactured dental prosthesis with a computer-aided design (CAD) model of the same manufactured dental prosthesis and to generate a differences model; and a quality controller to determine whether the manufactured dental prosthesis is a good or a defective product based on a statistical characteristic of the differences model.

Method for determining a manufacturing parameter for making an aligner with a desired aligner thickness using a thermoforming device operable for making the aligner by shaping a precursor aligner into the aligner using a mold representative of a dental archform, the method comprising: obtaining a 3D map associated with the dental archform; parsing the 3D map to determine a first property value and a second property value, the first property value being based on the 3D map and the second property value being derived from a 2D projection of the 3D map, and determining a thickness of the precursor aligner for obtaining the desired aligner thickness based on a ratio of the first property value and the second property value and a given value of an operating parameter of the thermoforming device; and sending instructions to the thermoforming device to make the desired aligner based on the determined operating parameter.

A method of correction of a three-dimensional digital model of an arch of a patient or “reference model.” The method includes the following steps: acquisition of at least one two-dimensional image of the arch, called updated image (Ia.sub.1;Ia.sub.2), in actual acquisition conditions; search, for each updated image, of virtual acquisition conditions providing a two-dimensional image of the reference model, which maximizes the fit with the updated image, or “reference image” (Ir.sub.1;Ir.sub.2); comparison of the reference image with the updated image to detect differences; and correction of the reference model to reduce said differences to get a corrected reference model.

A dental milling machine is provided with a tool which is guided in a chuck. A workpiece arm is mounted opposite the tool to be able to be moved at least in the direction of the spindle axis. With a control device it can be moved in relation to the workpiece, especially by means of a drive motor at the workpiece arm. The workpiece arm has an abutment element, whereby the control device moves the tool and the abutment element towards each other until they abut each other. The control device can be used to detect abutment of the abutment element with respect to the tool, in particular with respect to its tip, in particular by decelerating the (relative) movement of the tool and the abutment element towards each another, upon contact of the tool and the abutment element. This position may be signaled as a reference position and, especially may be stored.

A wax model of a required coping is produced using CNC machining techniques based on a virtual model of the coping created from digital data obtained from the intraoral cavity. The dental coping is then fabricated from the wax model.

A dental abutment system including an abutment, an inlay and screw, wherein the screw at least partially occupies the interior channel of the inlay. A method of manufacturing a dental abutment system and to a control data set including a plurality of control instructions that are configured to, when implemented in an additive manufacturing system, to cause the system to execute at least the step of forming an abutment at the distal end of an inlay using an additive manufacturing process. The screw is a captive screw. The interior channel of the abutment is variable in diameter and the smallest diameter is ≥102% and ≤110% of the width of the screw head and the longitudinal axis of the interior channel of the abutment and the longitudinal axis of the interior channel of the inlay are angled with respect to each other at an angle of ≥5 degrees.

A physical model of at least a portion of a patient's dentition has model dental surfaces corresponding to real dental surfaces of the patient's dentition. The physical model includes one or more targets, each configured for facilitating placement of an orthodontic appliance on the model at a desired location. The targets lack mechanical stops that are outwardly protruding from the original model dental surfaces. Also provided are a method of manufacturing a physical model for use in indirect bonding procedures, a method for indirect bonding for use in an orthodontic procedure, a method for providing an indirect bonding transfer tray for use in an orthodontic procedure, and a system for providing a physical model for use in indirect bonding orthodontic procedures.

Systems and methods are provided for machining dental prostheses including, over a network, receiving data concerning a dental prosthesis, selecting a material from which to machine the dental prosthesis, and determining machining instructions for machining the dental prosthesis based on a nominal enlargement factor corresponding to the selected material. The method can also include storing the machining instructions, receiving a request from a milling machine for a dental prosthesis to be milled by the milling machine, and associating the dental prosthesis with the milling machine. The method can also include selecting a material blank comprised of the selected material, determining a material blank enlargement factor of the selected material blank, modifying the machining instructions according to a difference between the nominal enlargement factor and the material blank enlargement factor, and machining the dental prosthesis according to the modified machining instructions.