| Summary: | Introduction: Laser therapy and stimulation of the acupuncture points are anti-inflammatory and analgesic alternative treatments in dentistry.
Objective: to describe the use of low power laser therapy in the emergency treatment of apical periodontitis after endodontic treatment during 2018.
Methods: observational, descriptive, longitudinal, and prospective study of patients who attended emergency department at Guama Dentistry Clinic during 2018, Pinar del Río, presenting apical periodontitis after endodontic treatment; 86 patients participated in the study. Descriptive statistics was applied, respecting the bioethical principles.
Results: female gender predominated (53,49 %), apical periodontitis after endodontic treatment was more prevalent in the age group 20-24 (30,23 %); 65,5 % of the patients presented remission and relief after the third treatment session. Only 2,33 % needed more than six treatment sessions.
Conclusions: apical periodontitis after endodontic treatment is more common in women during the first half of the second decade of life. The treatment showed effectiveness from the first treatment sessions.
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