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Title: can be dangerous
Review: I used a waterpik on the high pressure setting, and because of the tip design, it's difficult to properly shoot the stream perpendicular to the inner sides of teeth, especially the front teeth. Within days many of my teeth became perceptibly loose, and my periodontal disease is minimal, with healthy gums. I've come to realize that my improper use of repeatedly shooting significant pressure down the gum pocket must have separated the gingival connective tissue and even irritated the periodontal ligament that holds the teeth to bone. I just hope it will reverse over time. The significant dangers of this device definitely need to be better known.
