The interdental cleaning tool includes a base portion including a shaft portion that extends from a base end side to a top end side and gradually becomes thinner from the base end side to the top end side, a top end side cleaning portion including a top end side body covering a top end side portion of the shaft portion and top end side bristles protruding outward from an outer circumferential surface of the top end side body, and a base end side cleaning portion including a base end side body covering a portion of the shaft portion in the base end side than the top end side body and base end side bristles protruding outward from an outer circumferential surface of the base end side body. The top end side cleaning portion has a higher hardness than the base end side cleaning portion.

An interdental cleaning tool that is easily insertable in an interdental space by a user and has a high cleaning capability includes a base portion including a shaft portion having a shape insertable in an interdental space, and a cleaning portion that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The shaft portion has a triangular cross section on an orthogonal plane perpendicularly intersecting an axial direction of the shaft portion.

Provided is an interdental cleaning tool that is not too soft and is unlikely to break during use. An interdental cleaning tool according to the present invention includes: a cleaning tool body that is made of a synthetic resin, and includes a grip portion that is capable of being gripped with fingers of a user and a shaft portion that extends in one direction from the grip portion; and a cleaning portion configured to clean between teeth, covering a leading end of the shaft portion, and made of an elastomer, wherein Y>−0.07X+3.3 is satisfied, where Y is a maximum torque value (N.Math.cm) when the grip portion is rotated at a rotational speed of 10 rpm about a position located 15 mm away from a leading end of the cleaning portion, and X is a rotational angle (degrees) when the maximum torque value is measured.

An interdental cleaning tool capable of reducing possibility of a cleaning portion being detached from a shaft portion includes a base portion including a shaft portion (20) having a shape insertable in an interdental space, and a cleaning portion (50) that covers at least a portion of the shaft portion and is capable of cleaning an interdental space. The base portion further includes a protruding portion (40) that protrudes from a covered portion (22) in a direction intersecting the shaft portion (20), the covered portion (22) being a portion of the shaft portion (20) and covered by the cleaning portion (50).

The cleaning portion includes a cleaning portion body and a brush portion. The brush portion includes a first brush group and a second brush group. Bristles of the first brush group and the second brush group each have a shape whose a protruding length from the cleaning portion body gradually increases from a top end side to a base end side of the shaft portion. A protruding length from the cleaning portion body of a predetermined numbered one of the second brush group from the top end side to the base end side of the shaft portion is larger than a protruding length from the cleaning portion body of the predetermined numbered one of the bristles of the first brush group from the top end side to the base end side of the shaft portion.

Provided is an interdental cleaning tool that can reduce at least one of a resistance against insertion in an interdental space and a resistance against withdrawal from an interdental space, and has a high capability of scraping out deposit from an interdental space. The interdental cleaning tool includes a base portion including a shaft portion (20) and a cleaning portion (40). The cleaning portion (40) includes a cleaning portion body (50) and a plurality of bristles (60). The plurality of bristles (60) include at least one of a type of top end-oriented bristles and a type of base end-oriented bristles. The top end-oriented bristle has a shape titling to a top end side of the shaft portion (20) as advancing away from an outer circumferential surface of the cleaning portion body (50). The base end-oriented bristle has a shape tilting to a base end side of the shaft portion (20) as advancing away from the outer circumferential surface of the cleaning portion body (50).

A retractable interdental brush includes an interdental brush, a retractable mechanism, and a handle. The retractable mechanism is configured to drive the interdental brush to extend from the handle to clean a gap between teeth. After use, the interdental brush is retracted into an accommodation space of the handle through the retractable mechanism. The interdental brush may be a built-in interdental brush. When the built-in interdental brush is used for cleaning, a brush body may be first retracted into an elbow at a front end of a delivery device, an outlet of the elbow is pressed against the gap between teeth to push the brush body, and a working portion of the brush body and enters into the gap between teeth to clean the gap between teeth, thereby resolving a problem with existing interdental brush that easily stabs gingival tissue due to a difficulty of alignment with the gap between teeth.

An automated toothbrush assembly for brushing teeth includes a handle that is gripped for brushing teeth. A rotation unit is movably positioned within the handle and the rotation unit includes a drive shaft that extends outwardly through the handle. The rotation unit alternately rotates the drive shaft in a first direction and a second direction when the rotation unit is turned on. A plurality of brushing heads is provided and a respective one of the brushing heads is removably attachable to the handle to place the respective brushing head in mechanical communication with the drive shaft of the rotation. Each of the brushing heads includes a brush that has a conical shape to penetrate spaces between teeth.

A composition including a strain of Lactobacillus salivarius SA-03 has at least one of the physiologically active effects of anti-oxidation, oral health, immunity regulation, and promotion of exercise. Therefore, the above-mentioned composition can be used for the foregoing physiological activity and is used in a form of food, medicine, and oral cleaning composition.

A method (300) for providing feedback to a user of an oral cleaning device (10). The method includes the steps of: (i) receiving (330), from a sensor (28) of the oral cleaning device, data about a plurality of orientations of the oral cleaning device within the user's mouth during a cleaning session; (ii) extracting (340), from the received data, information about one or more stable orientations of the oral cleaning device within the user's mouth during the cleaning session, where a stable orientation is an orientation of the oral cleaning device maintained by the user for a period of time above a threshold; (iii) fitting (350) the information about the one or more stable orientations of the oral cleaning device to one or more expected orientations; and (iv) providing (360) feedback to the user about the cleaning session based on an analysis of the fitted one or more stable orientations.