Dental modeling system and method
a technology of dental modeling and model, applied in the field of dental modeling system and method, can solve the problems of insufficient precision in achieving accurate and precise tracking of tooth movement, difficult implementation in a practical manner, and insufficient accuracy of current techniques
Inactive Publication Date: 2010-07-01
HULTGREN BRUCE W +1
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- Application Information
AI Technical Summary
Benefits of technology
This approach provides accurate and reliable simulation of tooth movement, enabling better diagnosis and treatment planning with improved precision and reduced patient discomfort by eliminating the need for markers and x-rays, allowing for precise tracking and manipulation of tooth positions.
Problems solved by technology
However, studies and modeling reveal that tooth movement and growth is not usually truly linearly translational.
Although such models have proven to be successful in providing guidance for predicting tooth growth and movement, implementation in a practical manner has proven difficult.
Current techniques do not provide for accurately tracking tooth movement with sufficient precision and their relationship to the tooth's reference points.
While such markers provide for improved modeling and tracking, the insertion and placement of such markers and tracking of the markers relative to one another is intrusive and only allows tracking of the marker rather than the entire tooth.
A further problem with such markers and / or landmarks is the precision possible in tracking the changes in position.
The insertion and removal of markers is intrusive and inconvenient for the patient, requiring an additional procedure.
While such methods do provide for tracking of position and changes, the accuracy of such methods is decreased due to quality and resolution available for the images and the inaccuracy from manually outlining and precisely locating the markers and / or structural landmarks.
As the accuracy and precision are critical for predicting small movements and in locating instant centers of rotation, such tools may not be an acceptable simulator of the teeth and their movement.
Due to the precise measurements and the small distances involved, even minor errors can have a drastic adverse affect on the position of an instant center of rotation and therefore, the entire model and movement simulation, increasing the possibility for improper diagnosis and treatment.
The digital EMODEL™ digital model system provides a precise high resolution digital map of the teeth and gums, but its use has been limited in creating prostheses.
Such three dimensional digital images have been used as a starting point in treatment, but have not been used to project and simulate growth and movement.
Method used
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[0032]Referring now to the drawings, and in particular to FIG. 1, there is shown a digital image of a patients dentition 20 including an upper arch having a portion of the upper gums 22, and the exposed surfaces of the upper teeth 26. In a similar manner, a lower arch including a portion of the teeth and lower gums 24 is also created in a digitized model along with the exposed upper surfaces of the lower teeth 28. Such an image of the dentition 20 is digitized and provides a virtual three dimensional image of the patient's teeth for diagnosis, treatment and correction. Such a method and system for creating such a virtual image of the patient's mouth is shown and described in U.S. Pat. No. 6,579,059, incorporated herein by reference. One method of creating digital images is taking a casting of the patients teeth and creating a plaster model and scanning the plaster cast. The digitizing system 70 is shown in FIG. 2 and includes a scanner 72 that passes a laser over the plaster model h...
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A method for simulating tooth movement utilizes electronic modeling to represent the teeth. Instant centers of rotation are determined and projected paths of movement are plotted. The electronic model provides improved precision and provides a method for simulating movement in three dimensions. The movement from growth and / or correction is shown with the electronic model. The simulation provides for improved correction.
Description
[0001]This application is being filed on 4 May 2007, as a PCT International Patent application in the name of Bruce Willard Hultgren, a citizen of the U.S., applicant for the designation of all countries, and claims priority to U.S. Provisional Patent Application No. 60 / 797,911, filed May 4, 2006.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method and system for simulating movement of a patient's jaw and teeth.[0004]2. Description of the Prior Art[0005]In the field of orthodontics, simulation is important for treatment and correction. If the manner in which the teeth and jaw may form and grow is known, the dental practitioner is better able to diagnose problems and identify potential problems. In addition, the limits of moving teeth through braces and other correction techniques become more apparent and treatment may be carried out with more precision and greater chance of success.[0006]Prior simulation techniques consisted of th...
Claims
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IPC IPC(8): G06F17/50
CPCA61C7/00A61C9/0053A61C7/002
InventorHULTGREN, BRUCE W.MARSHALL, MICHAEL C.
OwnerHULTGREN BRUCE W