Dental

Method of application of neutral sodium fluoride according to Knutson's technique involves all except-

At the initial appointment, the teeth are first cleaned with aqueous pumice slurry and then isolated with cotton rolls and dried with compressed air.

The sodium fluoride solution applied on the teeth with cotton-tipped applicator stick is allowed to dry for 3 to 4 minutes.

A second, third and fourth fluoride application, each preceded by a prophylaxis, is scheduled at intervals of approximately one week.

The four-visit procedure is recommended for ages 3, 7, 1 1 and 13 years.