Dental system for treating a root canal
US5017134A · kind A · utility
14Cited by
2References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 6, 1990 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Apr 6, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C19/042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to dental equipment for treating a root canal. According to the present invention, two input signals with different frequencies are superposed. The difference between impedances corresponding to the two different frequencies at a given position in the root canal where the impedances hardly vary, is obtained. This value and a clinically determined value are used to detect the desired position in the root canal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.