Title:
METHOD AND INSTRUMENT FOR DISCRIMINATION OF DECAY, SCALE, NODULE, OR BACTERIAL INFECTION OF TOOTH
Document Type and Number:
Japanese Patent JP3223469
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To raise the detection sensitivity of discrimination of decay, scale, nodule, or bacterial infection of a tooth, i.e., to increase the difference between measurement signals from a healthy tooth range and measurement signals from a decayed tooth range.
SOLUTION: In this method and instrument for discrimination of decay, scale, nodule, or bacterial infection of a tooth, an excited ray 9 is generated at a light source 1, the excited ray 9 is directed to a tooth to be checked to generate fluorescence 10 which is detected and evaluated by a detector 8. A spectrum filter to suppress the fluorescence 9 detected and evaluated by the detector 8 to wavelength larger than about 800 nm is placed in front of the detector 8 to enable the improvement of a decayed tooth range to be evaluated. The irradiation on the tooth to be checked is preferably carried out by excited ray 9 with comparatively long wavelength, for instance 780 nm.
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Inventors:
Raimund Hivest
Roebato Paulus
Roebato Paulus
Application Number:
JP15860499A
Publication Date:
October 29, 2001
Filing Date:
June 04, 1999
Export Citation:
Assignee:
Kaltenbach und Hoecht Gesellschaft Mitt Beschlenktel Haftung und Company
International Classes:
A61B5/00; A61B10/00; G01N21/64; A61C19/04; (IPC1-7): A61C19/04; A61B10/00; G01N21/64
Domestic Patent References:
| JP5337142A | ||||
| JP9189659A | ||||
| JP10314194A |
Attorney, Agent or Firm:
Shimizu Yoshi Hiro (2 people outside)