US 11,911,227 B2
Aqueous solution for use in cleaning via irradiation by ultraviolet rays and/or near-ultraviolet visible light and/or light in 800-900 NM near-infrared region, dentifrice including said solution, dental treatment device, toothbrush, and tooth cleaning met
Taro Kanno, Sendai (JP); Yoshimi Niwano, Osakasayama (JP); and Keisuke Nakamura, Sendai (JP)
Assigned to Luke Co., Ltd., (JP)
Filed by Luke Co., Ltd., Miyagi (JP)
Filed on Oct. 21, 2022, as Appl. No. 17/970,632.
Application 17/970,632 is a division of application No. 16/302,516, granted, now 11,510,752, previously published as PCT/JP2017/018413, filed on May 16, 2017.
Claims priority of application No. 2016-100826 (JP), filed on May 19, 2016.
Prior Publication US 2023/0040921 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 1/00 (2006.01); A01N 25/22 (2006.01); A01N 59/00 (2006.01); A46B 15/00 (2006.01); A61C 17/00 (2006.01); A61K 8/22 (2006.01); A61K 33/40 (2006.01); A61L 2/18 (2006.01); A61N 5/06 (2006.01); A61C 17/02 (2006.01); A61C 19/06 (2006.01); A61L 2/08 (2006.01); A61L 2/10 (2006.01); A61Q 11/00 (2006.01)
CPC A61C 1/0076 (2013.01) [A01N 25/22 (2013.01); A01N 59/00 (2013.01); A46B 15/00 (2013.01); A61C 17/00 (2013.01); A61K 8/22 (2013.01); A61K 33/40 (2013.01); A61L 2/186 (2013.01); A61N 5/0603 (2013.01); A61C 1/0084 (2013.01); A61C 17/02 (2013.01); A61C 19/06 (2013.01); A61L 2/085 (2013.01); A61L 2/10 (2013.01); A61N 2005/0606 (2013.01); A61Q 11/00 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A dental treatment apparatus comprising a scaler tip which injects an aqueous solution for intraoral cleaning via irradiation with an ultraviolet ray and/or a near-ultraviolet visible ray and/or a ray in an 800-900 nm near-infrared region,
wherein the aqueous solution includes:
hydrogen peroxide, a concentration of the hydrogen peroxide in the aqueous solution being in a range of 1 w/v % to 7 w/v %;
water containing iron and copper as impurities, an amount of each of the iron and the copper being less than 0.05 mg/L in the water; and
a hydrogen peroxide stabilizer, a concentration of the hydrogen peroxide stabilizer in the aqueous solution being 81 ppm (mg/L) or less, the hydrogen peroxide stabilizer being at least one of a group consisting of phosphoric acid, phenacetin, and acetanilide,
after the ultraviolet ray and/or the near-ultraviolet visible ray and/or the ray in the 800-900 nm near-infrared region irradiates the aqueous solution for five minutes, there is no decomposed products that are toxic to a human in the aqueous solution via a high performance liquid chromatography analysis,
a content of impurity heavy metals, which decompose the hydrogen peroxide, in the aqueous solution is 0.001 w/v % or less with respect to the hydrogen peroxide, and
the hydrogen peroxide stabilizer is configured to prevent the hydrogen peroxide from being decomposed by the impurity heavy metals.