Dental bite trays; dental device that expands the mouth to improve the field of view inside the mouth, and extracts saliva from the work area inside the mouth; dental impression trays; dental instruments, namely, prophy angles; dental syringes; bibs for dental use; teeth protectors for dental purposes; barriers and sleeves in the nature of surgical drapes for dental examination chair headrests, dental examination chairs and for X-ray apparatus for dental imaging