Progression or reactivation of Otosclerotic lesion despite Fluoride therapy

Progression or reactivation of Otosclerotic disease as shown by tomography, despitemoderate dosage Sodium Fluoride therapy, is due to poor intestinal absorption of the drug in its enteric coated form. It is also seen when the drug is often temporarily withdrawn. During Sodium Fluoride therapy for Otosclerosis an intestinal absorption test of the preparation is necessary.