Oral irrigators look similar to toothbrushes, but they spray water. A nozzle sprays a stream of water pressurized enough to rinse away loose bacteria and plaque. This ensures the area surrounding your dental bridge or crown is free of harmful microorganisms. You do not want plaque building up along your crown or have your crown clean while the dental implant underneath deteriorates. Proper use of an oral irrigator should rinse the area clean of the plaque you brushed from your dental appliances. Related Post: You Might Need Dental Implants If You Have One Of These Symptoms