Hamadan University of Medical Sciences Avicenna Journal of Dental Research 2423-7582 10 4 2018 12 01 Successful Treatment of Necrosed Primary Molars Using LSTR Technique by a New Combination of Antibiotics: A Case Series 143 147 10.34172/ajdr.2018.28 EN Rezvan Rafatjou Sanaz Afzal Soltani https://orcid.org/0000-0002-9207-0270 Journal Article 10.34172/ajdr.2018.28 2018 07 21 2018 10 09 Introduction: In this study we used combination of amoxicillin, metronidazole and clindamycin for treatment of 3 patients with infected primary molars until eruption of the first molars. Materials and Methods: A single session LSTR was done using combination of ciprofloxacin, metronidazole and andclindamycin at the ratio of 1:1:1. Conclusions: After 12- to 13-month follow-ups, the combination can greatly help save hopeless infected primary molars before eruption of permanent first molars due to effective space maintenance.