Answer:
No, a dental technician cannot open a dental practice. A DT is an important member of the dental axuillaries, trained only to produced dental prosthetics such as crown, bridges, veneers etc, under the prescription of a dentist.
The role of the dentist if difference. The dentist is responsible for the clinical side of dentistry which includes doing fillings, extracting teeth, etc.
A DT work in dental laboratory while a dentist work in dental practice/ surgey