Abstract
The situation sometimes exists where a tooth causes excessive pain to the patient, but the diagnosis cannot be made by the dentist with the traditional methods. In these instances, application of low incident doses of laser energy can provide valuable help in detecting periodontitis in its initial phases. The patient feels a sharp pain when low incident levels of laser light are applied to the tooth. Five cases are presented, where only the use of the low level laser therapy (LLLT) made possible the identification of the problematic tooth.