A dental device tracking method including acquiring, using an imager of a dental device, at least a first image which includes an image of at least one user body portion outside of a user's oral cavity; identifying the at least one user body portion in the first image; and determining, using the at least the first image, a position of the dental device with respect to the at least one user body portion.

An oral care implement including a handle and a replacement head that is detachably coupled to the handle. The oral care implement may include a handle having a longitudinal axis that includes a gripping portion and a stem extending from the gripping portion. The gripping portion may have a shoulder that circumferentially surrounds the stem and an annular rib protruding from the shoulder. The replacement head may have a sleeve portion terminating in a proximal edge that is formed from a resilient material. The replacement head may be detachably coupled to the handle so that the annular rib of the shoulder and the proximal edge of the sleeve portion that is formed of elastomeric material are in contact with one another.

An oral care implement including a handle and a replacement head that is detachably coupled to the handle. The oral care implement may include a handle having a longitudinal axis that includes a gripping portion and a stem extending from the gripping portion. The gripping portion may have a shoulder that circumferentially surrounds the stem and an annular rib protruding from the shoulder. The replacement head may have a sleeve portion terminating in a proximal edge that is formed from a resilient material. The replacement head may be detachably coupled to the handle so that the annular rib of the shoulder and the proximal edge of the sleeve portion that is formed of elastomeric material are in contact with one another.

A method and apparatus permitting arbitrary, relative motions of a distal end of a toothbrush or flosser with respect to a handle with real-time selectable motions. The toothbrush has a handle and a post, with a mechanism mechanically coupling the handle to the post permitting relative translational movement of the post with respect to the handle.

A brush head (112, 212, 312, 412) for attachment to a shaft (118, 218, 318, 418) of an oral care device (400), the brush head (112, 212, 312, 412) comprising: a neck (114, 214, 314) having a working head (116, 216, 316, 416), the neck being configured to transmit oscillations from the shaft to the working head; and a spring (102, 202, 302) captive within the neck, wherein upon insertion of the shaft into the assembled brush head, the spring provides a retention force for retaining the brush head on the shaft, characterised in that the spring is in direct mechanical contact with the neck and the shaft.

A brush head (112, 212, 312, 412) for attachment to a shaft (118, 218, 318, 418) of an oral care device (400), the brush head (112, 212, 312, 412) comprising: a neck (114, 214, 314) having a working head (116, 216, 316, 416), the neck being configured to transmit oscillations from the shaft to the working head; and a spring (102, 202, 302) captive within the neck, wherein upon insertion of the shaft into the assembled brush head, the spring provides a retention force for retaining the brush head on the shaft, characterised in that the spring is in direct mechanical contact with the neck and the shaft.

A personal care cleaning device (10) including a housing (12), a resonant drive actuator (20), which includes a rotor (24) having a first moment of inertia (J.sub.r) and a stator (22) having a second moment of inertia (J.sub.s); a first plurality of leaf spring elements (60) having a first spring constant (k.sub.rh), each leaf spring element of the first plurality of leaf spring elements (60) being connected the housing (12) and to the rotor (24) such that each leaf spring element of the first plurality of leaf springs elements (60) extends radially from the rotor (24) to the housing (12), each leaf spring element of the second plurality of leaf spring elements (62) being connected to the housing (12) and engaging with the stator (22), wherein the ratio of the first (k.sub.rh) and second (k.sub.sh) spring constants is sufficiently similar to the ratio of the first (J.sub.r) and second moments (J.sub.s) of inertia such that there is substantially no resulting torque transmitted to the housing (12) during operation.

A personal care cleaning device (10) including a housing (12), a resonant drive actuator (20), which includes a rotor (24) having a first moment of inertia (J.sub.r) and a stator (22) having a second moment of inertia (J.sub.s); a first plurality of leaf spring elements (60) having a first spring constant (k.sub.rh), each leaf spring element of the first plurality of leaf spring elements (60) being connected the housing (12) and to the rotor (24) such that each leaf spring element of the first plurality of leaf springs elements (60) extends radially from the rotor (24) to the housing (12), each leaf spring element of the second plurality of leaf spring elements (62) being connected to the housing (12) and engaging with the stator (22), wherein the ratio of the first (k.sub.rh) and second (k.sub.sh) spring constants is sufficiently similar to the ratio of the first (J.sub.r) and second moments (J.sub.s) of inertia such that there is substantially no resulting torque transmitted to the housing (12) during operation.

The present invention discloses a system and method related to the field of dentistry, specifically dental appliances such as retainers, dentures, grills and athletic mouth-wear and is proposed to provide advanced assembly in providing assistance in cleaning the appliances through improved measures. Currently, there are cleaning methods for retainers and dentures, however they only include liquid solution methods without automatic moving bristles. As per the present art, users soak their retainers or dentures in the solution and then are required to use a toothbrush to scrub off excess liquid solution or built-up plaque that was not dissolved by the solution, making the process too repetitive and time consuming. Additionally, the toothbrush does not provide automatic circular motion, which is preferred in order to produce retainers or dentures that are plaque-free and completely transparent. Finally, appliances can be damaged and break when using a handheld technique with a toothbrush due to lack of support and stability for the appliance. This cleaning device takes into consideration these deficiencies and corrects them to make the process more effective and convenient for all users in any environment.

An oral cavity cleaning device, which comprises a body, a water jet tip, a first motor, a second motor, a brush, and a water suction assembly. A rotating shaft extends out of an upper end surface of the body. The first motor drives the rotating shaft to vibrate to drive the brush to vibrate. The upper end surface of the body further comprises a water outlet, and the water jet tip is disposed on the upper end surface of the body and is in communication with the water outlet. Further, the water jet tip is disposed on a side of the brush facing a user, and the water jet tip is disposed below bristles of the brush. The second motor drives the water suction assembly to pump water from a built-in or external container, and water from a water passage disposed in the body sprays out of the water outlet and the water jet tip.