Set of x-ray film holders for taking X-ray exposures of an entire tooth
US5044009A · kind A · utility
Inventor
Key dates
| Filing date | May 8, 1990 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | May 8, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/512
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The set of X-ray film holders for taking X-ray exposures of an entire tooth consists of a holder for the side teeth and a holder for the front teeth, each of the holders comprising a resilient clip for the X-ray film, a formed bite portion and a cranked indicator rod extending perpendicularly to the film plane for adjusting the central X-ray beam orthogonally to the film plane. The film clip is attached to the bite portion in such a manner that it is pivotable by 360.degree. and may be locked in the plane which is formed by the indicator rod with its cranked portion. Except for special X-ray tubes, it is useful to have a centering aid for the central X-ray beam. To this end, an index having pointer means is movably disposed on the indicator rod, guiding means being provided on the indicator rod and on the tube of the index in order to bring the pointer means into the correct position according to whether the X-ray film is in its upward or downward position. Such a set of X-ray film holders enables exact aligning of all X-ray tubes with the currently used X-ray films for exposures of all teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.