No corporation shall practice dentistry or engage therein, or hold itself out as being entitled to practice dentistry, or furnish dental services or dentists, or advertise under or assume the title of dentist or dental surgeon or equivalent title, or furnish dental advice for any compensation, or advertise or hold itself out with any other person or alone, that it has or owns a dental office or can furnish dental service, dentists, or dental surgeons, or solicit through itself, or its agents, officers, employees, directors, or trustees, dental patronage for any dentist or dental surgeon employed by any corporation; provided that nothing in this section shall prohibit a corporation from employing a dentist or dentists to render free dental services to its employees, nor shall it apply to corporations or associations in which the dental services were originated and are being conducted upon a purely charitable basis for the worthy poor, nor shall it apply to corporations or associations furnishing information or clerical services which can be furnished by persons not licensed to practice dentistry, to any person lawfully engaged in the practice of dentistry, when the dentist assumes full responsibility for the information and services, nor shall it apply to dental service corporations formed for the primary purpose of contracting with individuals, groups of individuals, and corporations for defraying or assuming the cost of services of dentists and dental surgeons and of contracting on behalf of dentists and dental surgeons to furnish such services as provided in chapter 423, nor shall it apply to professional corporations as defined in chapter 415A. Any corporation violating this section shall be fined not less than $200 or more than $500 for each offense, and each day’s violation shall be considered a separate offense.

Every association of persons engaged in the practice of dentistry under the name of an association or other title, shall cause to be displayed and kept in a conspicuous place at the entrance to its place of business the names of each and every person employed by the association in the practice of dentistry; and every person so employed by any association shall cause the person’s name to be so displayed. Any person employed by the association whose name is not displayed as above provided shall be guilty of a failure to comply with this chapter and shall be punished as in this chapter provided; and the association, and the persons comprising the same, for failure to display the aforesaid names, shall be guilty of a failure to comply with this chapter and shall be punished as in this chapter provided.