<Li> Moderate: 3--4 mm (0.12--0.16 in) of attachment loss </Li> <Li> Severe: ≥ 5 mm (0.20 in) of attachment loss </Li> <P> In the early stages, periodontitis has very few symptoms, and in many individuals the disease has progressed significantly before they seek treatment . </P> <P> Symptoms may include: </P>

Where should probing begin on the lingual site of the mandibular left first molar