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In the interest of the public health, safety and welfare and to protect the public from the improper, unprofessional, incompetent and unlawful practice of dentistry and dental hygiene, it is necessary to provide laws and regulations controlling the granting and use of the privilege to practice dentistry and dental hygiene and to ensure, as much as possible, that only qualified and fit persons hold that privilege. The fundamental purpose of this subchapter is to protect the public, and any license, certificate or other practice authorization issued pursuant to this subchapter is a revocable privilege, and no holder of such privilege may acquire thereby an irrevocable right. The provisions of this subchapter relating to licensure are not intended to reduce competition or restrain trade with respect to the oral health needs of the public.