In a future sixth generation – called the adaptive type – it will be possible to create a steady algorithm for adapting the method of measuring the working length of the root canal depending on the canal moisture characteristics. The method must eliminate the necessity of drying or moistening of the canal in order to achieve a high degree of precision to locate the apical constriction, even if blood or additionally imported liquid such sodium hypochlorite is present, or while manipulating the needle in dry conditions.