This randomized controlled clinical trial sought to examine the influence of Ga-Al-As Laser, a type of low-level laser therapy (LLLT), on pulp-exposed immature permanent mandibular first molars managed with direct pulp capping using mineral trioxide aggregate (MTA), relative to teeth receiving the identical capping material without laser intervention, as measured by clinical and radiographic indicators. Thirty carious, endodontically asymptomatic immature permanent mandibular first molars were sourced from healthy children aged 6–9 years. The trial was designed so that half of the specimens were capped exclusively with MTA, whereas the remaining half underwent laser application before standard MTA capping. Evaluations were conducted at three distinct time points: immediately after the procedure (T0), at the 6-month mark (T1), and at the 12-month mark (T2). The gathered data were processed using SPSS version 24. Outcomes were assessed using a two-tailed t-test for correlated samples, with a significance threshold of 0.05. Teeth subjected to LLLT exhibited more pronounced apical maturation over the first 6 months. They demonstrated superior pain-relieving properties during the initial 12 postoperative hours, compared with those treated solely with MTA. In addition to its pain-relieving and antibacterial actions, LLLT may facilitate completion of apical development in immature teeth.
