Dr. Charles Thomas has been practicing dentistry for 5 years, and his practice has grown to the point where his tray setup system must be changed. Dr. Thomas has three treatment rooms and one hygiene room. He is willing to finance the necessary updating and would like to color code his instruments, trays, and so forth. Case Study Review 1. Before deciding on a system, what factors must be considered? 2. Suggest some color-code combinations. 3. What are the benefits of an office in which a color-coding system is effectively used?