Learn how to use the Umbrella™ retractor – a simple, straightforward, and extremely easy to place tongue, lip, and cheek tongue retractor that is incredibly comfortable for the patient. Contributed by Ultradent Products, Inc. Ultradent is an international manufacturer and leading developer of high-tech dental materials, devices and instruments, operating... Learn how to use the Umbrella™ retractor – a simple, straightforward, and extremely easy to place tongue, lip, and cheek tongue retractor that is incredibly comfortable for the patient. Contributed by Ultradent Products, Inc. Ultradent is an international manufacturer and leading developer of high-tech dental materials, devices and instruments, operating...