for fair use on American Student Dental Association Though this image is subject to copyright, its use is covered by the U.S. fair use laws because:

* It illustrates an educational article about the entity that the logo represents.
*  The image is used as the primary means of visual identification of the article topic.
*  It is a low resolution image, and thus not suitable for production of counterfeit goods.
*  The logo is not used in such a way that a reader would be confused into believing that the article is written or authorized by the owner of the logo.