be swallowed or of the type commonly known as chewing gum this composition can be used to treat lesions of the oral pharyngeal and esophageal cavity using the method described in u s pat no 4 517 295 hyaluronic acid as sodium hyaluronate is prepared having an average molecular weight of 10 000 and a viscosity of 1 5 mpa u00b7 s at a concentration of 6 w v in water at 20 u00b0 c the compound obtained is used to prepare an injectable liquid composition in which the compound is present in a concentration of 10 in particular for treating internal traumatic and surgical lesions and for treating ocular lesions and lesions of the auditory duct a compound of the aforedescribed type is marketed by the french company soliance with the symbol ha tbpm again in accordance with the teachings of u s pat no 4 517 295 hyaluronic acid as sodium hyaluronate is prepared having an average molecular weight of 27 000 and a viscosity of 0 5 mpa u00b7 s at a concentration of 2 w v in water at 20 u00b0 c this product can be used to prepare powders consisting of 100 of the product usable in odontostomatology for example after dental extractions a product with the aforestated characteristics is produced by the french company soliance with the name renovhyal using the same method as examples 3 and.