The microcracks at each measurement point were color labeled, layered, and compared. ![]() Transmission microscopy of all samples was performed at T0, before preparation T1, immediately after endodontic preparation and T2, after laser application in the laser groups and after 1 week of storage in the control and calcium hydroxide groups. Each sample was randomly allocated to 4 groups receiving constant or interval laser irradiation time, calcium hydroxide disinfection, or a control group, with 10 samples per group. Materials and methods: Forty dental roots underwent mechanical endodontic preparation in a standardized manner. ![]() Objectives: The aim of the present study was to investigate differences in the amount of dentin microcracking caused by the use of a 970-nm diode laser with different parameters for endodontic disinfection procedures.
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