A virtual teaching system for a dental periapical X-ray film and a virtual periapical X-ray film acquisition method is provided. The system includes a workstation and a dental radiography machine. The dental radiography machine includes a mounting plate, a stand column, a head fixing device, a five-axis robotic arm, a bulb tube, and a seat; the stand column is disposed on the top side of the mounting plate, and the head fixing device and the seat are respectively fixed on the upper and lower portions of the stand column; and the five-axis robotic arm includes five joint modules and five connecting rods, and the two ends of the five-axis robotic arm are respectively connected to the top portion of the stand column and the bulb tube. The workstation is communicatively connected to the dental radiography machine.

The present invention provides an oral image marker detection method for detecting a marker, which is the reference when an oral scan image and a CT image are matched, the method comprising the steps of: aligning oral scan images in the horizontal plane direction; estimating a marker candidate area from the aligned oral scan images and detecting an undivided marker from the marker candidate area; and dividing the undivided marker to estimate a marker in the undivided marker, and estimating the area from the upper surface of the undivided marker to a certain depth in the lower direction to be the marker.

A method of obtaining three-dimensional data includes: obtaining three-dimensional reference data with respect to an object; aligning, on the three-dimensional reference data, a first frame obtained by scanning a first region of the object; aligning, on the three-dimensional reference data, a second frame obtained by scanning a second region of the object, at least a portion of the second region overlapping the first region; and obtaining the three-dimensional data by merging the first frame with the second frame based on an overlapping portion between the first region and the second region.

A dental implantation assessment method includes the steps of creating a 3D teeth model; setting up a reference line, creating a health status table, and forming a multi-level frame model for an implant placement position on the teeth model; dividing each level of the frame model into a centered implant module and multiple surrounding test modules; dividing each test module into multiple assessment zones, and combining the latter with the health status table; selecting and placing a dental implant model in the frame model, and defining one assessment zone in each test module that contacts with a periphery of the dental implant model as a selected zone; and lastly, computing assessment values assigned to the selected zones to determine an object type of the dental implant model. A dentist can decide an optimal dental implant through dental implant model size selection and implantation simulation to ensure successful dental implant surgery.

A dental implantation assessment method includes the steps of creating a 3D teeth model; setting up a reference line, creating a health status table, and forming a multi-level frame model for an implant placement position on the teeth model; dividing each level of the frame model into a centered implant module and multiple surrounding test modules; dividing each test module into multiple assessment zones, and combining the latter with the health status table; selecting and placing a dental implant model in the frame model, and defining one assessment zone in each test module that contacts with a periphery of the dental implant model as a selected zone; and lastly, computing assessment values assigned to the selected zones to determine an object type of the dental implant model. A dentist can decide an optimal dental implant through dental implant model size selection and implantation simulation to ensure successful dental implant surgery.

A unique CAD subtract body intended to create a design of a mating surface for a veneering overlay and a dental implant framework wherein the unique CAD subtract body is derived from a diagnostic wax-up surface model. The diagnostic wax-up surface model is created from at least one of scanning a diagnostic wax up or denture tooth set up, CAD models in a virtual set up, an intraoral scan of a diagnostic wax up or denture tooth set up taken in a patient's mouth, a CT scan or series of CT scans of a patient's mouth, a CT scan or series of CT scans with the use of a radiographic stent in a patient's mouth, and wherein the unique CAD subtract body can be used to create the tool path for the manufacturing of the veneering overlay and allows for the fabrication of a dental implant from at least one of a metallic material, a ceramic material, an acrylic material, a biocompatible material.

A unique CAD subtract body intended to create a design of a mating surface for a veneering overlay and a dental implant framework wherein the unique CAD subtract body is derived from a diagnostic wax-up surface model. The diagnostic wax-up surface model is created from at least one of scanning a diagnostic wax up or denture tooth set up, CAD models in a virtual set up, an intraoral scan of a diagnostic wax up or denture tooth set up taken in a patient's mouth, a CT scan or series of CT scans of a patient's mouth, a CT scan or series of CT scans with the use of a radiographic stent in a patient's mouth, and wherein the unique CAD subtract body can be used to create the tool path for the manufacturing of the veneering overlay and allows for the fabrication of a dental implant from at least one of a metallic material, a ceramic material, an acrylic material, a biocompatible material.

A computer-implemented method and system of automatically detecting and removing extraneous material from a digital dental impression includes detecting one or more dental features in a digital dental impression, filtering the one or more dental features, digitally joining the one or more dental features, and determining one or more regions of interest from the joined one or more digital dental features.

To produce 3D x-ray images, it is necessary to compensate for patient movement during the emission and detection of x-rays; this may be achieved by providing an x-ray sensor 20 comprising a digital x-ray detector 40, and an inertial sensor 50, 60 for providing positional information relating to changes in the relative position of the x-ray sensor during detection of x-rays.

To produce 3D x-ray images, it is necessary to compensate for patient movement during the emission and detection of x-rays; this may be achieved by providing an x-ray sensor 20 comprising a digital x-ray detector 40, and an inertial sensor 50, 60 for providing positional information relating to changes in the relative position of the x-ray sensor during detection of x-rays.