DH 102: FINAL STUDY GUIDE EXAM
QUESTIONS WITH VERIFIED ANSWERS
If your patient gets a hematoma, what are the correct instructions to give to your patient?
FIRST- Apply direct pressure and ice can be applied.
Heat the next day
Which injection has the highest positive aspiration rate?
Inferior Alveolar block
T/F: If you do not have bony contact with an IA injection, you can go ahead and deposit the
solution.
False- DO NOT deposit if you don't have bony contact because the needle tip may be in the
parotid gland
Which nerve may have transient paralysis from the IA?
Facial nerve
How many mm do you go above the occlusal plane when giving the IA?
6-10mm
What is the number one risk for an IA block?
Lingual shock
What are vasoconstrictors?
Drugs that cause blood vessels to constrict
What are the two types of vasoconstrictors used in the dental field?
Epinephrine and levonordefrine
No one is allergic to epinephrine. Allergies in local anesthesia are from sodium bisulfite,
which is the preservative added to LA when the vasoconstrictor is present.
Both statements are true
What does the gauge represent?
Diameter of the lumen of the needle
T/F: The smaller the gauge number, the smaller the diameter of the needle
False- the smaller the gauge number, the larger the diameter of the needle.
How do you determine what needle gauge to use?
, The depth of penetration and risk of intravascular injections
When would you use a 25 gauge needle?
For areas of high risk for positive aspirations
Where are ester local anesthetics metabolized?
In the plasma by pseudocholinesterase
Where are amide local anesthetics metabolized?
liver
Which organ is the primary organ for excretory of the LA and its metabolites?
Kidneys
Cocaine, Procaine, Butacaine, Benzocaine and Tretracaine are all examples of what type of
local anesthetic?
Ester
Articaine, Bupivicaine, Lidocaine, Mepivacaine, and Prilocaine are all examples of what
type of LA?
Amide
What is the bevel?
slanted tip of needle
T/F: The bevel should be pointed toward the bone when injecting.
True
T/F: It is safe to insert the needle all the way to the hub.
False- Never insert the needle to the hub. This can cause breakage of the needle
After how many injections should the needle be changed?
3-4 (textbook) (2-3 in clinic at school)
If a patient has pain on insertion, this could mean the needle is what?
Dull
Pain on withdrawl- barb on needle tip.
What is the maximum dose of epi for a healthy patient?
0.20 mg epi
What is the maximum dose of epi for a cardiac patient?
QUESTIONS WITH VERIFIED ANSWERS
If your patient gets a hematoma, what are the correct instructions to give to your patient?
FIRST- Apply direct pressure and ice can be applied.
Heat the next day
Which injection has the highest positive aspiration rate?
Inferior Alveolar block
T/F: If you do not have bony contact with an IA injection, you can go ahead and deposit the
solution.
False- DO NOT deposit if you don't have bony contact because the needle tip may be in the
parotid gland
Which nerve may have transient paralysis from the IA?
Facial nerve
How many mm do you go above the occlusal plane when giving the IA?
6-10mm
What is the number one risk for an IA block?
Lingual shock
What are vasoconstrictors?
Drugs that cause blood vessels to constrict
What are the two types of vasoconstrictors used in the dental field?
Epinephrine and levonordefrine
No one is allergic to epinephrine. Allergies in local anesthesia are from sodium bisulfite,
which is the preservative added to LA when the vasoconstrictor is present.
Both statements are true
What does the gauge represent?
Diameter of the lumen of the needle
T/F: The smaller the gauge number, the smaller the diameter of the needle
False- the smaller the gauge number, the larger the diameter of the needle.
How do you determine what needle gauge to use?
, The depth of penetration and risk of intravascular injections
When would you use a 25 gauge needle?
For areas of high risk for positive aspirations
Where are ester local anesthetics metabolized?
In the plasma by pseudocholinesterase
Where are amide local anesthetics metabolized?
liver
Which organ is the primary organ for excretory of the LA and its metabolites?
Kidneys
Cocaine, Procaine, Butacaine, Benzocaine and Tretracaine are all examples of what type of
local anesthetic?
Ester
Articaine, Bupivicaine, Lidocaine, Mepivacaine, and Prilocaine are all examples of what
type of LA?
Amide
What is the bevel?
slanted tip of needle
T/F: The bevel should be pointed toward the bone when injecting.
True
T/F: It is safe to insert the needle all the way to the hub.
False- Never insert the needle to the hub. This can cause breakage of the needle
After how many injections should the needle be changed?
3-4 (textbook) (2-3 in clinic at school)
If a patient has pain on insertion, this could mean the needle is what?
Dull
Pain on withdrawl- barb on needle tip.
What is the maximum dose of epi for a healthy patient?
0.20 mg epi
What is the maximum dose of epi for a cardiac patient?
