US 12,343,231 B2
Device and method for distinguishing dental plaque from dental calculus
Kai-Ju Cheng, Taoyuan (TW); Yu-Hsun Chen, Taoyuan (TW); Hao-Ping Lee, Taoyuan (TW); Tong-Ming Hsu, Taoyuan (TW); Chin-Yuan Ting, Taoyuan (TW); Shao-Ang Chen, Taoyuan (TW); Kuan-Chung Chen, Taoyuan (TW); and Hsin-Lun Hsieh, Taoyuan (TW)
Assigned to QUANTA COMPUTER INC., Taoyuan (TW)
Filed by Quanta Computer Inc., Taoyuan (TW)
Filed on Aug. 4, 2022, as Appl. No. 17/817,409.
Claims priority of application No. 111111081 (TW), filed on Mar. 24, 2022.
Prior Publication US 2023/0301751 A1, Sep. 28, 2023
Int. Cl. A61C 7/00 (2006.01); A61C 19/04 (2006.01)
CPC A61C 7/002 (2013.01) [A61C 19/04 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A distinguishing device for dental plaque and dental calculus, comprising:
a light-emitting diode moving in a first direction in the distinguishing device and adapted to be separated from teeth in an oral cavity by a predetermined distance in a second direction perpendicular to the first direction, wherein the light-emitting diode generates a blue light to illuminate the teeth, so that a dental plaque on the teeth generates a first autofluorescence and a dental calculus on the teeth generates a second autofluorescence;
an image sensing unit configured to sense the first autofluorescence and the second autofluorescence; and
a processor coupled to the image sensing unit to distinguish a dental plaque area from a dental calculus area on the teeth according to a difference in luminances of the first autofluorescence and the second autofluorescence.