Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAlphaprodineAnesthesia, GeneralAnesthesia Recovery PeriodConsciousnessMeperidineChloral HydrateEndoscopy, Digestive SystemDentistry, OperativeBurns, ElectricAnesthesia, IntravenousDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidineNitrous OxideEndoscopy, GastrointestinalFentanylTooth ExtractionColonoscopyIntubation, IntratrachealProspective StudiesPatient SatisfactionCholangiopancreatography, Endoscopic RetrogradeBronchoscopyInjections, IntravenousDouble-Blind MethodNeurosurgical ProceduresPainPilot ProjectsOxygenEquipment DesignTreatment OutcomeAnxietyWorkTime FactorsAnalgesiaHeart RateRetrospective Studies