A phototherapy mouthpiece includes a mouthguard including a light source and a power pack extending power therethrough a cable to the light source mounted for converting the power to red or near-red photon light, in order to convert the photon energy to proton-motive energy in the gum margin, so that gum cells can replicate to heal gum tissue. The mouthguard portion forms a plurality of recesses and air ducts to enhance oral osmosis. Optionally, a power pack based light source can deliver red or near red photon light through an optic cable to achieve the same proton-motive energy effect, but with less load on the jaw.