Free DANB General Chairside Practice Test Review
1. In the positioning of the dental assistant for four-handed dentistry, which of the following is not recommended?
a. Eye level is positioned 4 to 6 inches above the dentist's eye level
b. Feet placed on the foot ring or base of the stool and the stool is positioned close to the dental chair
c. Legs are together, seating position is close to the back of the stool, feet planted firmly on the floor
d. Stool positioned close to the dental chair with legs parallel to the dental chair
2. What is the name of the instrument that includes the following types: straight, binangle, Wedelstaedt, and angle-former?
c. Gingival trimmer
3. A patient undergoing a procedure of approximately 30 minutes will most likely require which of the following types of anesthetics?
b. Prilocaine HCl block
d. Lidocaine HCl
4. Which of the following statements would be the most effective in communicating with an apprehensive patient?
a. The next sound you hear will be the drill.
b. We are preparing the tooth for restoration.
c. You will likely feel a little pain initially but it will subside once the anesthetic kicks in.
d. I am applying a topical anesthetic before the dentist comes in to give you the shot.
5. Which of the following may be contraindicated in a patient with severe hypertension?
b. Nitrous oxide
Answers & Explanations
1. C: Proper positioning for the dental assistant is extremely important. A specialized stool is used to help provide comfort and promote easy mobility while protecting against unnecessary strain to the upper body. The dental assistant should be seated towards the back of the stool, close to the dental chair, and legs should be parallel with the dental chair. The feet should rest on the bottom of the stool such as the foot ring. The eye level of the dental assistant should be 4-6 inches above that of the dentist or other type of operator such as dental hygienist.
2. D: Hand-cutting instruments are used to allow the dentist to easily remove the parts of the tooth that are decayed. These instruments are positioned next to the basic setup on the tray. Types of hand-cutting instruments include the excavator, hoe, chisel, hatchet, and gingival margin trimmer. Many types of chisels are available, all with a slightly different function. Straight, binangle, Wedelstaedt, and angle-former are all types of chisels. Chisels are used to get through the enamel part of the tooth or to make straight lines. Most dentists will have their personal preference as to what type of chisels they use most often.
3. D: The most commonly used anesthetic in dentistry is lidocaine HCl. It is a type of short-duration anesthetic used for procedures expecting to last approximately 30 minutes. For procedures that will last about an hour, an intermediate-duration anesthetic will most likely be selected by the dentist. This would include lidocaine with epinephrine, mepivacaine with epinephrine, prilocaine HCl (with and without epinephrine), and articaine with epinephrine. Long-duration anesthetic such as bupivacaine with epinephrine is used for procedures that will last 90 minutes or more. Procaine (Novocain) is not used as frequently as a short-duration anesthetic since the introduction of lidocaine.
4. B: Dental fear or phobia is very real and how a patient is approached can make a big difference in future treatment. Verbal communication is very important. It is important to communicate with the patient in a way that he or she will understand. It is also important to make appropriate word choices to minimize the patient's reaction. Certain words, such as pain, shot, drill, or filling, may evoke fear or intimidation. Words that may be substituted include discomfort, anesthetic, prepare tooth, or restoration. These may be more effective. Nonverbal communication is also important. The patient is able to observe body language, so it is important to show a positive, stress-free image to the patient. This can be accomplished by breathing slowly and deeply, using calm facial expressions, and having an overall positive attitude. Good listening skills are also essential.
5. C: Levonordefrin (Neo-Cobefrin) and epinephrine are vasoconstrictors that should be avoided in certain situations. A vasoconstrictor is a type of drug that causes the smooth muscles to constrict or narrow. This may cause undue strain on the heart or other organs. Patients with a history of severe hypertension, unstable angina, recent heart attacks or bypass surgery, or uncontrolled congestive heart failure should not receive a vasoconstrictor. Instead, an anesthetic without a vasoconstrictor should be used such as lidocaine or prilocaine HCl. Nitrous oxide can also be used. Another helpful consideration for patients with heart disease is to minimize the length of the appointment if possible to avoid additional stress. Vital signs should be monitored and some patients may require supplemental oxygen during a procedure.
Last Updated: 07/05/2018