CDCA local anesthesia exam review questions and answers verified and updated.

CDCA local anesthesia exam review questions and answers verified and updated. which has thicker cortical plate, maxillary or mandibular? - correct bular (this decreased the amount of the local anesthesia molecules that can penetrate to nerves during infiltration injections) due to the thickness of cortical bone, which is a good option for local anesthetic in the mandibular arch during infiltrations? - correct answers.Articaine (Septocaine) is sometimes effective for mand. infiltrations (4% vs. 2% for lidocaine) due to the increased number of molecules hematomas are most common with which type of injection, and why? - correct answers.PSA due to nicking a vessel in the pterygoid plexus of veins what is the TX for a hematoma? - correct ure, cold compresses on/off, NSAIDS, and time. a positive aspiration when administering a PSA is due to what? - correct ating hemorrhage caused by injection what are the three most common locations for hematomas to occur? - correct answers.1. PSA 2. IA 3. mental blanching of the tissue following/during an injection is caused by what? - correct pasm/vasoconstriction caused by epinephrine or brushing against autonomic nerves stimulation vasospasm the pterygomandibular space/triangle is bordered by what anatomical structures? - correct , lateral pterygoid muscle, and medial pterygoid muscle the pterygomandibular space/triangle is identified intra-orally by what? - correct goid hamulus (palpation), coronoid notch (palpation), and pterygomandibular raphe (visual) the mandibular foramen lies approx. __________________________ of the distance from the anterior border of the ramus to the posterior border - correct answers.1/2 to 2/3 Antero-posteriorly, the greater palatine foramen is located between the ___________________________. - correct e oft he maxillary second molar and the middle of the third molar in about 80-90% of patients. all arteries leading to the oral cavity receive blood from what? - correct nal carotid (most are direct or indirect branches from the maxillary artery with the exception of the lingula -- this is a direct branch from the external carotid) veins from the oral cavity will drain into what? - correct nal jugular (both internal and external drain into the brachiocephalic veins which drain to the superior vena cava do myelinated or un-myelinated nerves create faster impulse? - correct nated (impulses jump from node to node -- node of ranvier) what is saltatory conduction? - correct process of nerve impulses jumping from nodes of ranvier along a myelinated nerve what is the resting potential charges of a nerve? - correct e is negative and outside is positive what molecules are predominately outside/inside at resting potential? - correct answers.Na+ outside and K+ inside what is depolarization? - correct answers.Na+ channels open , Na+ flows in reversing polarity; K+ flows out to restore neutrality; the Na+ and K+ pumps restore polarity (resting potential) what is the mechanism of action for local anesthetics? - correct s the Na+ channels preventing depolarization what is the basic structure of anesthetics? - correct tic ring (lipid soluble), intermediate chain (amide or ester configuration), and terminal amine (able to ionize and become water soluble)