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In randomized clinical trial study 44 patient with symptomatic irreversible pulpitis in mandibular teeth are selected.
in one(22 patient) group low level laser is exposed and another group are control. Pain intensity is measured before start of protocol with visual analog scale.electric pulp test is measured after and before of laser irradiation to buccal aspect of teeth.
Dose of laser is 15 j/cm2 with diode laser.laser irradiates before injection.electric pulp test is done immediately after irradiation of laser for measurement of nerve signal transmission. Inferior alveoular nerve block injection is done.index for success of injection is lip numbness. After that access cavity preparation is started and the pain measured during dentin cutting and exposure of pulp with visual analog scale.