A dental isolator in the form of a U-shaped absorbent member having a first portion and a second portion disposed on either side of a third central portion and a retainment member, which retainment member transversely engages both the first portion and the second portion of the absorbent member, the retainment member being adapted to fit between adjacent teeth of a dental patient, the first portion of the U-shaped absorbent member being adapted to be disposed on the internal side of the teeth of a dental patient between the teeth and the tongue of the patient, the second portion of the U-shaped absorbent member to be disposed between the cheek and the mucobuccal fold of the patient with the central portion of the U-shaped absorbent member surrounding a rear tooth of the patient, the distal end of the second portion of the U-shaped absorbent member being tapered.