A handpiece assembly for laser treating a target surface and a laser system are disclosed. A handpiece assembly for laser treating a target surface includes a cable connector that is detachably coupled to a power supply and control module. The cable connector is configured to receive power and control signals from the power supply and control module. The handpiece assembly includes a laser module configured to receive the power and control signals from the cable connector and to generate electromagnetic energy based on the received power and control signals. The laser module is a replaceable module that is detachably coupled to the cable connector and a handpiece. The replaceable module allows a particular laser module to be removed from the handpiece assembly and replaced with another laser module. The handpiece assembly further includes the handpiece configured to receive the electromagnetic energy from the laser module and to direct the electromagnetic energy to the target surface.

Embodiments of the present invention provide an oral therapy device. The oral therapy device includes a therapeutic unit configured to be located inside an oral cavity of a user, the therapeutic unit including a plurality of stimulation elements provided thereupon, and a contact layer configured to make contact with inner surfaces of the oral cavity, the contact layer shaped as concaved inwards towards a housing container of the therapeutic unit. The oral therapy device further includes a control module electrically connected to the therapeutic unit through an electrical conductor. Also, the oral therapy device includes an electrical power source provided within the control module, the electrical power source configured to provide electrical power to the plurality of stimulation elements. Furthermore, the control module is configured to regulate the supply of the electrical power to the plurality of stimulation elements to modify operational characteristics of the plurality of stimulation elements.

Embodiments of the invention include a handpiece system including a detachable cable that can receive at least power, and a detachable cable connector, where the detachable cable connector and detachable cable are reversibly attachable to each other. In some embodiments, the system includes an interchangeable laser module, where the laser module and detachable cable connector are reversibly attachable to each other. Further, the interchangeable laser module is configured and arranged to receive at least the power via the cable connector when coupled to the cable connector, and to be removed from the detachable cable connector and replaced with another laser module. In some embodiments, the system further includes an interchangeable handpiece which is reversibly attachable to the interchangeable laser module. Further, the interchangeable handpiece is configured and arranged to be removed from the interchangeable laser module and replaced with another interchangeable handpiece.