National Board Dental Hygiene

The lamina dura appears as a dense and ___ line that surrounds the tooth of a tooth a. radiopaque b. radiolucent - a. radiopaque The alveolar crest appears radiopaque and is typically ___ to ___ mm below the CEJ - 1.5- 2mm The PDL appears ___ on a radiograph and is a thin line around the tooth - Radiolucent What radiopacity is located posterior and inferior to the TMJ area? - Mastoid process What radiopaque spine extends from the temporal bone anterior to the mastoid process? - Styloid p...

The x-ray was discovered by a. Heinrich Geissler b. Wilhelm Roentgen c. Johann Hittorf d. William Crookes - Wilhelm Roentgen Which discovery was the precursor to the discovery of x-rays? A. Beta particles B. Alpha particles C. Cathode rays D. Radioactive materials - Cathode rays Which term describes two or more atoms that are joined by a chemical bond? a. ion b. ion pair c. molecule d. proton - Molecule Which is not a type of particulate radiation? A. Alpha particles B. Beta par...

1. During swallowing, the hyoid bone moves downward. During swallowing, the larynx elevates. a. Both statements are true b. Both statements are false c. The first statement is true, the second statement is false d. The first statement is false, the second statement is true - d - false/ true During swallowing, the hyoid bone moves upward as the larynx elevates. After moving upward, the hyoid bone moves forward then returns to its starting position. 2. Which nervous system produces the figh...

What is myxedema? - Hypothyroidism in adults According to the American Heart Association guideline, which of the following heart conditions does NOT require premedication? A.) Incompletely repaired cyanotic congenital heart disease B.) History of infective endocarditis C.) Rheumatic heart disease D.) Artificial heart valve - C.) Rheumatic heart disease Which of the following is NOT correct regarding furcations? A.) They can be detected on anterior teeth B.) They can be detected on the p...