Abstract: A dental x-ray radiation protection device/system reduces radiation exposure to patient(s) and the surrounding environment around patient(s) in dental clinics during x-ray radiography procedures. It provides maximum protection for the areas of the patient's body which are not protected with radiation protection (Lead) apron. The invented device/system is adjustable at different angles and directions to target teeth and comprises of two main segments that provide radiation reduction. The device could be attached to a dental x-ray machine as a mount frame or stand frame or even be hung from the ceiling or wall of the x-ray room. Thicknesses of the radiation protection shield for all parts of device are calculated using radiation physics equations by solving for thickness of radiation shield material(s) with respect to x-ray beam intensity, x-ray beam energy, mass or linear attenuation coefficient and density of radiation protection material(s) to get up to 99.9% radiation reduction.