DAT 154 Exam 1 2023 with 100% correct answers

Upright Position Vertical, seated position in which the back of the dental chair is upright at a 90-degree angle. Supine Position Lying on back, facing upward; Patients head and knees will be at approximately the same level. Subsupine Position Patients head is lower than their feet. Operators Stool 5 casters (wheels) to easily move around patient, when sitting feet are flat on floor. Designed to support the body for a prolonged period in a fixed muscular activity. Assistants Stool Provides stability, mobility, and comfort, allowing a proper fatigue-reducing posture. Abdominal bar positioned for support, foot ring at base where feet are placed. Dental Unit Provides the necessary electrical and air-operated mechanics to the hoses, attachments, and working parts of the unit. Dental Unit Delivery Systems: (3) Front- positioned over the patients lap Side- positioned at either side of patients chair Rear- positioned behind dental chair Rheostat A foot-controlled device that is placed on the floor near the operator. With foot pressure, slow-speed and high-speed handpieces are controlled. Dental Unit Waterlines Supplies water through hoses or waterlines into the dental handpieces. Air-Water Syringe Hand-held instrument attached to the dental unit. Functions in 3 ways: 1) Delivers a stream of water. 2) Delivers a stream of air. 3) Delivers a combined spray of air and water. The tip of this instrument is classified as semi-critical and is to be replaced after every procedure. Operating Light Used to illuminate the oral cavity during a dental procedure. Mandibular work: placed directly above mouth. Maxillary work: angled upward. When not working on oral cavity: placed over chest 25-30 inches. Oral Evacuation System A means for removing water, saliva, blood, and other fragments during a dental procedure. 2 different types. What are the 2 types of oral evacuation systems? Saliva ejector and high-volume evacuator (HVE).