A: Dental cartridges. The rubber stopper is on the right end of the cartridge while the aluminum cap with the diaphragm is on the left end of the cartridge. B: Containers of dental anesthetic. Source: Chapter 20. Oral & Maxillofacial Regional Anesthesia, NYSORA Textbook of Regional Anesthesia and Acute Pain Management Citation: Hadzic A. NYSORA Textbook of Regional Anesthesia and Acute Pain Management; 2007 Available at: https://accessanesthesiology.mhmedical.com/DownloadImage.aspx?image=/data/books/hadz/hadz_c020f007b.jpg&sec=39830433&BookID=413&ChapterSecID=39828169&imagename= Accessed: March 05, 2018 Copyright © 2018 McGraw-Hill Education. All rights reserved