Every practitioner of dentistry within the meaning of this act shall post and keep conspicuously displayed the dentist’s name, license and current license renewal certificate in each office in which the dentist practices, in plain sight of patients, and if there is more than one dentist practicing or employed in any office the manager or proprietor of such office shall post or display, or cause to be posted and displayed, in like manner the name and license of each dentist so practicing or employed in such office.