Dental apparatus and devices including anaesthetic apparatus, x-ray apparatus and installations for the production of x-rays for dental treatment purposes and components and parts therefor; dental instruments including surgical clips, surgical cutlery, pins for artificial teeth, probes, scalpels, scissors, pliers and drills including powered drills and other powered dental instruments; teeth, dentures, surgical implants, gauze and dental correction devices including braces; tooth rescue preservation devices including containers and tooth cradles, baskets or supports therefor