A deciduous tooth affected by dental caries involving the pulp tissue with subsequent periradicular pathosis at times makes the conventional endodontic procedures a dilemma for a variety of reasons. In this situation, lesion sterilization and tissue repair (LSTR) stands out as the only option by which dentists could increase the longevity of the deciduous teeth of a young child. This therapy aims to eliminate bacteria from the root canals by sterilizing the lesion and promoting tissue repair and regeneration by the host\'s natural tissue responses. This article reviews the rationale, indications, contraindications and the procedure in detail.
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