Classification Grade Size (diameter*) 1A Single lesion, 2.0 cm 4B Multiple lesions, largest >2.0 cm *Lesion size measured as the largest diameter Grade Severity 1 Asymptomatic 2 Mild 3 Moderate 4 Severe<unk>  is classified based on severity, number of lesions, and lesion size.<unk>  of greater severity is given a higher grade, with asymptomatic<unk>  designated as grade 1 and severe<unk>  as grade 4.
Osteonecrosis of the jaw
Osteomyelitis of the jaws
Alveolar osteitis
Acroosteolysis
Osteomyelitis
Osteoradionecrosis
Medication-related osteonecrosis of the jaw
Osteolysis