Abstract: A facebow-free transfer method includes: registering virtual upper and lower casts respectively to an upper teeth part of a virtual maxilla model and a lower teeth part of a virtual mandible model so as to form a virtual teeth and jaw model; mounting the virtual teeth and jaw model on a virtual articulator; generating a virtual occlusion transfer module that is mounted on the virtual articulator and that has a part extending to and fitting in an in-between space of virtual upper and lower casts of the virtual teeth and jaw model; and creating an actual occlusion transfer device that is to be mounted on an articulator based on the virtual occlusion transfer module.

Abstract: A mounting method of dental cast is disclosed. The mounting method includes the steps of providing an articulator and a label module having at least a label and at least a reference object, generating a label coordinate information in accordance with the reference object and the label, providing a midface and mandible image information and generating a landmark coordinate information in accordance with a plurality of landmarks of the midface and mandible image information, generating a structure coordinate information in accordance with a plurality of structures of the articulator and the label, disposing a first dental cast connected with the label module on the articulator, and providing a detecting device to detect the label and adjust the position of the first dental cast in accordance with the midface and mandible image information, the label coordinate information, and the structure coordinate information.

Abstract: An orthognathic planning system applied with at least a dental cast includes an articulator, a detecting device, at least a label module and a data processing device. The dental cast is mounted on the articulator. The detecting device is disposed with respect to the articulator. The label module has at least a label and is disposed on the dental cast. The data processing device is signally connected with the detecting device and stores midface and mandible image data. The detecting device traces the label and provides position data, and the data processing device provides orthognathic planning data in accordance with the position data and the midface and mandible image data. The present invention also discloses an orthognathic planning method.

Abstract: An auxiliary device for an articulator includes a base and at least an adjusting structure. The base is provided for positioning an articulator, and the adjusting structure is disposed on the base. The adjusting structure includes a first ball joint, a second ball joint and a connecting assembly. The first ball joint is connected to the base, and the two ends of the connecting assembly are connected to the first ball joint and the second ball joint, respectively. The adjusting structure is moved relatively to the articulator by the movement of at least one of the first ball joint and the second ball joint, thereby adjusting the position of a dental cast disposed on the articulator. The auxiliary device is advantageous for conveniently adjusting the dental cast disposed on the articulator and accelerating the process of the preoperative planning.

Abstract: A mounting method of dental cast is disclosed. The mounting method includes the steps of providing an articulator and a. label module having at least a label and at least a reference object, generating a label coordinate information in accordance with the reference object and the label, providing a midface and mandible image information and generating a landmark coordinate information in accordance with a plurality of landmarks of the midface and mandible image information, generating a structure coordinate information in accordance with a plurality of structures of the articulator and the label, disposing a first dental cast connected with the label module on the articulator, and providing a detecting device to detect the label and adjust the position of the first dental cast in accordance with the midface and mandible image information, the label coordinate information, and the structure coordinate information.

Abstract: The method comprises steps of making a plaster dental cast of a patient, reconstructing jaw image assembly models, performing registration between physical stone and image model, adjusting the plaster dental cast based on a x-ray cephalometric plan, tracking movements of the plaster dental cast, obtaining optimal symmetry planes of the upper and lower jaw image assemblies, determining whether a degree of overall symmetry is elevated, and making surgical occlusal splints for surgical guiding. With foregoing method, possible results of executing an orthognathic surgical plan can be predicted and the surgical plan can be considered more carefully to achieve both occlusion function and facial symmetry.

Abstract: The method is performed in a computer and includes acts of importing medical image data sets of an object, selecting regions of interest of the object in each medical image data set, processing the medical image data and constructing an optimal symmetry plane. The act of selecting the regions of interest of the object in each medical image data set defines the regions of interest of the object in each medical image data set and locates the regions of interest of the object in each medical image data set. The act of processing the medical image data executes an error equation and obtains optimal parameters of the optimal symmetry plane with a symmetry value. The act of constructing an optimal symmetry plane constructs an optimal symmetry plane with the obtained optimal parameters. Based on the discovered Optimal Symmetry Plane, slanted images from medical imaging can be rectified.

Abstract: The method comprises steps of making a plaster dental cast of a patient, reconstructing jaw image assembly models, performing registration between physical stone and image model, adjusting the plaster dental cast based on a x-ray cephalometric plan, tracking movements of the plaster dental cast, obtaining optimal symmetry planes of the upper and lower jaw image assemblies, determining whether a degree of overall symmetry is elevated, and making surgical occlusal splints for surgical guiding. With foregoing method, possible results of executing an orthognathic surgical plan can be predicted and the surgical plan can be considered more carefully to achieve both occlusion function and facial symmetry.

Abstract: The method is performed in a computer and comprises acts of importing medical image data sets of an object, selecting regions of interest of the object in each medical image data set, processing the medical image data and constructing an optimal symmetry plane. The act of selecting the regions of interest of the object in each medical image data set defines the regions of interest of the object in each medical image data set and locates the regions of interest of the object in each medical image data set. The act of processing the medical image data executes an error equation and obtains optimal parameters of the optimal symmetry plane with a symmetry value. The act of constructing an optimal symmetry plane constructs an optimal symmetry plane with the obtained optimal parameters. Base on the discovered Optimal Symmetry Plane, the slanted images from medical imaging can be rectified.