Anesthesia, Dental; Anesthesia, General; Anesthesia, Local/statistics & numerical data; Anesthetics, Local/therapeutic use; Dental Care for Children/methods; Adolescent; Anesthesia, Dental/methods; Anesthesia, Dental/statistics & numerical data; Anesthesia, General/statistics & numerical data; Anesthesia, Inhalation/statistics & numerical data; Anesthesia, Local/adverse effects; Anesthetics, Local/administration & dosage; Anesthetics, Local/toxicity; Child; Child, Preschool; Conscious Sedation/statistics & numerical data; Dental Anxiety; Documentation; Humans; Hypersensitivity; Infant; Infant, Newborn; Nitrous Oxide/administration & dosage; Pain/prevention & control; Pain Measurement; Paresthesia; Pediatric Dentistry; United States