Device for registering a dental radiograph having distortion mea

Details Device for registering a dental radiograph having distortion mea Device for registering a dental radiograph having distortion mea

1994-08-29

1995-05-16

Porta, David P.

X-ray or gamma ray systems or devices

Auxiliary data acquisition or recording

378168, 378170, A61B 614

Patent

active

054168228

ABSTRACT:
The accuracy of pre-treatment radiographic images is improved by standardizing a technique for placing a bite block in a patient's mouth, by minimizing distortion in the resulting radiograph, and by providing a means for measuring the remaining distortion in the radiographic image. The placement of the bite block is registered on study models prior to the taking of the radiograph such that the dental practitioner can predetermine the best possible position for the bite block per individual patient outside the patient's mouth. The best possible position allows the dental practitioner to optimize the position of the bite block to obtain a radiograph having minimal vertical distortion and mesio-distal distortion. As some distortion is inevitable, the invention also allows for a means to measure the resulting distortion based on spatial markers set at a predetermined distance apart which are superimposed onto the radiographic image.

REFERENCES:
patent: 4554676 (1985-11-01), Maldonado et al.
patent: 4598416 (1986-07-01), Donato
patent: 4941164 (1990-07-01), Schuller et al.
patent: 4949370 (1990-08-01), Tanaka
patent: 4995108 (1991-02-01), Tanaka
patent: 5090047 (1992-02-01), Angotti et al.
patent: 5289522 (1974-02-01), Kanbar et al.

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