Apparatus for dental purposes; Apparatus for dental use; Dental apparatus and instruments; Dental apparatus for milling; Dental moulding apparatus; Dental moulding devices; Dental prostheses; Apparatus for use in orthodontics; Materials for use in orthodontics (prostheses); Orthodontic apparatus; Orthodontic appliances; Orthodontic products; Splinting materials for medical use; Splints for medical use; Orthodontic brackets (braces) for use in straightening teeth; Teeth protectors for dental purposes; Teeth regulating (bracing) devices