Any person who violates any provision of this chapter shall be guilty of a class D felony. Any person who continues to practice dentistry, dental medicine or dental surgery, after his license, certificate, registration or authority to so do has been suspended or revoked and while such disability continues, shall be guilty of a class D felony. For the purposes of this section, each instance of patient contact or consultation which is in violation of any provision of this section shall constitute a separate offense. Failure to renew a license in a timely manner shall not constitute a violation for the purposes of this section.