[The correlation between color change, swelling and iodine reaction in gingivitis]

The use of an index with separate evaluation of colour change, swelling and iodine reaction (in accordance with a classification into 4 degrees) and separate determination of the P, M and A units corresponds to the conditions in practice and yields reproducible results. Correlations between colour, swelling and iodine reaction could be established which were most marked for colour and iodine reaction.