IANB Multiple Choice Questions

**[IANB]** 1\) Nerves anesthetized by an inferior alveolar nerve block are Inferior alveolar nerve Buccal nerve Lingual nerve Nerve to medial pterygoid Mental nerve Incisive nerve Auriculotemporal nerve Mandibular nerve Infraorbital nerve Mylohyoid nerve 2\) The incidence of positive asp...

**[IANB]** 1\) Nerves anesthetized by an inferior alveolar nerve block are Inferior alveolar nerve Buccal nerve Lingual nerve Nerve to medial pterygoid Mental nerve Incisive nerve Auriculotemporal nerve Mandibular nerve Infraorbital nerve Mylohyoid nerve 2\) The incidence of positive aspiration seen in an inferior alveolar nerve block is 5% - 10% 10% - 15% 5.7% 2% 19% - 23% 5.3% 3\) Alternative injections for IANB are all except Mental nerve block Buccal nerve block Intra- osseous injection Incisive nerve block Auriculotemporal nerve block Supraperiosteal injections Intraseptal injection Pdl injections Gow-Gates nerve block Vazirani-Akinosi nerve block 4\) Landmarks for an inferior alveolar nerve block are Greatest concavity on the anterior border of ramus Occlusal plane of the maxillary posterior teeth Mucous membrane distal to the third molar Horizontal plane of the pterygomandibular raphe Vertical plane of the pterygomandibular raphe Occlusal plane of the mandibular anterior teeth Occlusal plane of the mandibular posterior teeth 5\) The parameters that decide the area of insertion for an inferior alveolar nerve block are Line parallel to the mandibular occlusal plane at a height of 6-10mm Mesiopalatal cusp of the maxillary second molar Positioning of syringe barrel over the contralateral mandibular lateral incisors Three-fourth of the anteroposterior distance from the coronoid notch to the deepest part of pterygomandibular raphe Positioning of the syringe barrel over the contralateral mandibular molars Two-third or three-fourth the depth of the long dental needle 6)Why are local anesthetics ineffective when injected into an area of infection or inflammation? Infected tissue has a basic PH Infected tissue has an acidic PH More concentration of unionized agent Increased diffusion of both ionized and unionized agents across the nerve membrane 7)Potential drug interactions with vasoconstrictors are seen with Tricyclic antidepressants Monoamine oxidase inhibitors Digoxin Calcium channel blockers Beta-Blockers Non-steroidal anti-inflammatory drugs 8)Clinical manifestations of local anesthetic toxicity are Muscle twitching Auditory hallucination Tonic-clonic seizures Dizziness Hypertension Hypomagnesemia Tachycardia Sinus bradycardia Cardiac arrest Hyperglycemia 9)Which local anesthetic agent can cause methemoglobinemia? Prilocaine Articaine Lignocaine Bupivacaine Tetracaine Ropivacaine Cocaine Benzocaine 10)Which local anesthetic agent is safe to be given for a pregnant or a lactating patient? Category B: Lidocaine Category C: Articaine Category B: Prilocaine Category B: Articaine 11)The following local anesthetics agent are metabolized by the following mechanisms Amide local anesthetics are metabolized by Cytochrome P450 enzymes produced in the liver Ester local anesthetics are metabolized by Cytochrome P450 enzymes produced in the liver Articaine undergoes partial hydrolysis by plasma cholinesterase 12)The Pka of local anesthetics is the PH at which equal concentrations of ionized and unionized forms exist ANS: TRUE 13)Mechanism of degradation of epinephrine Catechol O Methyl Transferase Hyaluronidase Monoamine oxidase Choline-esterase Collagenase 14)The roots of which tooth are most often dislodged into the maxillary sinus during extraction? Mesiobuccal root of maxillary second molar Palatal root of maxillary first molar Mesiobuccal root of maxillary first molar Palatal root of maxillary second molar Distobuccal root of maxillary first molar Distobuccal root of maxillary second molar 15)What muscles insert on the pterygomandibular raphe? Superior constrictor of pharynx Buccinator Medial Pterygoid Middle constrictor of pharynx Temporalis Masseter Lateral Pterygoid Area anesthetized by buccal nerve block is Pulpal anesthesia to the all the mandibular molars on the ipsilateral side Anesthetizes the mucoperiosteum and also provides pulpal anesthesia to the mandibular molars Mucoperiosteum buccal to mandibular molar teeth only Only anesthetizes the mandibular second and third molars The following are the landmarks for a Gow-gates block Lower border of tragus Inter-tragic notch External auditory meatus Corner of the mouth of the ipsilateral side Mesiopalatal cusp of maxillary second molar Mesiopalatal cusp of maxillary first molar Corner of the mouth of the contralateral side The landmarks of a Vazirani-Akinosi block are Mucogingival junction of the maxillary third molar Maxillary tuberosity Coronoid notch Anterior border of ramus Pterygoid notch