초록 ▼

A method of making a dental prosthesis in which data representing standard tooth shapes and sizes, relationships between teeth and adjacent and occlusive teeth and characteristics for securing a prosthesis to a prepared site, and machining instructions for shaping a blank to the configuration of a d

A method of making a dental prosthesis in which data representing standard tooth shapes and sizes, relationships between teeth and adjacent and occlusive teeth and characteristics for securing a prosthesis to a prepared site, and machining instructions for shaping a blank to the configuration of a dental prosthesis for direct implantation are stored in a computer memory. After preparing a site in the mouth of a patient to receive a dental prosthesis, the dental surgeon projects optically a grating upon said site in the mouth of the patient and generates an interference pattern representing a holistic impression of said site and its relationship to adjacent structures. The interference pattern is converted into data along x,y,z coordinates in a cartesian coordinate system representing machining of a blank to fit said site and matching data obtained by comparing the impression with the computer standards are used to select a best-fit shape and size. A machine tool is numerically controlled with the x,y,z coordinate data and x,y,z coordinate data from the match made by the computer and representing the shape and size of the prosthesis to totally and three-dimensionally fabricate said prosthesis in said machine tool.

대표청구항 ▼

A method of producing a dental prosthesis which comprises, carrying out under the control of a computer the steps of: creating an interference pattern containing site data corresponding to a three-dimensional view of a site in the buccal cavity; scanning said interference pattern to produce digital

A method of producing a dental prosthesis which comprises, carrying out under the control of a computer the steps of: creating an interference pattern containing site data corresponding to a three-dimensional view of a site in the buccal cavity; scanning said interference pattern to produce digital site data; processing said digital site data to create machine tool data; machining said prosthesis to fit said site and said buccal cavity directly under control of said machine tool data, said computer having a memory having a plurality of standard tooth patterns stored therein; and wherein said step of processing said digital site data comprises generating an envelope enclosing the volume of said prosthesis from said digital site data, displaying the so-produced envelope, selecting from said plurality of standard tooth patterns the pattern corresponding most closely to said organ, displaying the so-selected tooth pattern, and fitting said tooth pattern into said envelope under operator control, thereby creating a desired shape display, and wherein said computer computes said machine tool data based on said selected standard tooth shape as modified to create said desired shape display.