Lesion Sterilization and Tissue Repair (LSTR) represents a novel, minimally invasive approach in pediatric endodontics aimed at managing infected and non-vital primary teeth. Unlike conventional pulpectomy and pulpotomy, which require extensive instrumentation, LSTR relies on chemical disinfection through topical application of Triple Antibiotic Paste (TAP), commonly a mixture of metronidazole, ciprofloxacin, and minocycline. This method effectively eliminates polymicrobial infections within the pulp and periapical tissues, creating a sterile environment that supports natural repair processes...