 The efficacy and safety data belonging to clinical trials with Hyaluronic Acid HA in oral mucosa pathologies gingivitis, post-surgical treatment of incisions of the buccal cavity, periodontitis and other pathological periodontal conditions have been confirmed in about 20 years of clinical practice by dentists. Starting from this experience, several clinical centers, including our institute, have been introducing over the last years HAbased film-forming devices in pediatrics. In particular, we have been using a liquid formulation with 0.1 HA; it has been routinely administered in our clinic during the routine pre-visit by Nurses and Dental Hygienist to children with gingivitis and given to the parents to administered to the children in the post visit period as an adjunct to domiciliary care and oral hygiene instructions. The product we used is featured by the following additional characteristics: 