Purchasing a DryShield unit was the best investment that I’ve ever done for my patients and my piece of mind. I’m so dependent on it now that I can never work without it. It helps me focus on my work instead of constantly worrying about possibly injuring the intra-oral tissues and the risk of the patients aspiring a burr or an old restoration that’s being removed. I’ve purchased all sizes and I’m looking forward to using it on my very young pediatric patients!