CRP and response to penicillin: Measurable and objective presurgical criteria significantly predict the risk to have worse evolution, they allow us to individualize four subgroups at risk of needing multiples surgeries: (1) a group of patients with as CRP level higher than 200 mg/L, (2) a group of patients with as CRP level inferior to 50 mg/L and with immunodrepression condition, (3) a group of patients with an association CRP level between 50 and 200 mg/L and penicillin allergy and (4) a group of patients with an association CRP level between 50 and 200 mg/L and mandibular molar infection and psychiatric disorders.