IRCT20230718058840N1 IRCT 2023-08-20 Ilam University of Medical Sciences Comparison of pre – cooling and topical anesthetic in pain perception Maxillary injection among pediatric Comparison of pre – cooling and topical anesthetic in pain perception Maxillary injection among pediatric 2023-08-18 anticipated 50 Complete https://irct.ir/trial/71767 interventional Randomization: Not randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Blinding description: It should be noted that the samples are divided into two groups, in half of which the first injection is performed after applying the numbing gel and the second injection is performed after cold application, and in the second group, the opposite is done. Anesthesia injection will be performed by the first operator (pediatric dentist), who is the only person who knows about the treatment group of the study. Then, a second operator (a pediatric dentist and a dental student) who are blinded to the surface anesthesia chosen for the study, checks the child's behavior during the injection with the SEM (Child Voice, Eye and Movement) scale. and compare the obtained data with each other. Also, at the end of each injection, the child is asked to rate the level of pain felt based on the Wonge-Baker scale. N/A Cold and surface anesthetic gel on pain level caused by buccal injection in children. Intervention 1: Control group: In half of the samples, injection, after placing cotton dipped in benzocaine 20% anesthetic gel (prime gel) manufactured by American Prime Dental Company for 1 minute in the anesthesia area; will be done. Intervention 2: Intervention group: In the other half of the samples, ice carpool (which will be prepared by emptying the lidocaine cartridge and filling it with water and placing it in the freezer) will be used for 1 minute before injection. No - There is not a plan to make this available Justification or reason for not sharing IPD is It will be announced at the end of the study