For an infant – place the child on the parent’s lap with the head on the parent’s knees and the legs at the parent’s waist. Position yourself knee-to-knee with the parent, and treat the child from above the head.
Clean and dry the teeth with a gauze sponge. The teeth must be dry.
Use your fingers and sponges to isolate the dry teeth and keep them dry. You will usually be able to isolate a quadrant of teeth at a time, and you will have fewer teeth to work with in younger children.