Cold Vibratory Stimuli on Pain Perception Governing Infiltration Anesthesia in in Children

Inclusion Criteria: * Patients who are in need of extraction of maxillary posterior teeth. * Children free of any systemic disease or special health care needs (ASA I). * Children with no learning disabilities. * Positive or definitely positive behavior during preoperative assessments according to the Frankl Scale. * Patients whose parents will give consent to participate. Exclusion Criteria: * Having active sites of pathosis in the area of injection that could affect the anesthetic assessment. * Signs of reversible pulpitis. * Restorable tooth. * Patients allergic to local anesthesia or having a family history of allergy to local anesthesia. * Patients with acute oral or facial infection (swelling and/or cellulites )