FLUORESCENT METHOD FOR DETERMINING QUALITY OF MARGINAL ADHERENCE OF RESTORATION MATERIAL TO HARD TOOTH TISSUES Russian patent published in 2024 - IPC A61C3/00 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to dentistry, and is intended for use in non-contact determination of the quality of restorative material adhesion to dental hard tissues. Quality of the marginal adherence of the restoration material to the dental hard tissues is determined using an ultraviolet radiation source with a wavelength in range of 370 nm to 400 nm and a camera equipped with a macro lens and a cutoff threshold optical filter (CTOF) with a wavelength transmission spectrum limitation in range from 470 nm to 700 nm, wherein ultraviolet radiation is directed to the analysed tooth, and using a camera, an image of the analysed tooth is obtained, and the quality of the marginal adherence of the restoration material to the hard tissues of the tooth is determined. In the absence of yellow and pink fluorescence at the restoration/solid tissue boundary, it is concluded that the marginal adherence of the restoration is not disturbed. If observing yellow fluorescence at a distance not exceeding 20% of the boundary length, it is concluded that there are initial signs of disturbed marginal adherence of the restoration, which are not critical and the restoration cannot be replaced. If observing yellow fluorescence at distance exceeding 20% of the boundary length, it is concluded that signs of disturbed marginal adherence of the restoration have appeared, but the restoration cannot be replaced. If observing pink fluorescence at a distance of not more than 20% of the border length, it is concluded that there is a disturbance of the marginal adherence with penetration of cariogenic microbial flora and a risk of secondary caries; in this case, a replacement of the restoration is desirable. If observing pink fluorescence at distance exceeding 20% of the boundary length, it is concluded that there is a disturbance of the marginal adherence with penetration of cariogenic microbial flora and a high risk of secondary caries; urgent replacement of the restoration is desirable.

EFFECT: by using an ultraviolet radiation source with wavelength in range of 370 nm to 400 nm and a camera equipped with a macro lens and a cutoff threshold optical filter, the method enables detecting marginal adhesion characteristics of the restorations without discomfort for the patient.

3 cl, 4 tbl, 5 dwg, 2 ex