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Showing page 1 of 31 (277 total shorts) — subject: "Oral Surgery"
#1 Oral Surgery
Nerve membrane stabilization action of local anaesthetic agents is due to preventing conductance of Na ions from the exterior of the nerve to the interior.
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Answer
Nerve membrane stabilization action of local anaesthetic agents is due to 
 1. Increasing conductance of potassium ions
 2. Creating negative after potentials
 3. Preventing conductance of Na ions from the exterior of the nerve to the intrior
 4. None of the above
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#2 Oral Surgery
Analgesics should be administered before the effect of local anesthesia wears off (preemptive analgesia). This approach prevents the establishment of pain pathways and provides better pain control than waiting for pain to occur. It ensures patient comfort during the transition from anesthetic effect.
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Appropriate time to administer analgesic to reduce postoperative pain associated with removal of two mandibular molars
1) When pain becomes severe
2) Before the effect of LA wears off
3) The morning of surgery
4) Only after the return of sensation
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#3 Oral Surgery
Class B impaction in Pell and Gregory's classification means that the cusp tip of the impacted tooth is located between the occlusal plane of the second molar and the cervical line of the second molar. This is a common position for mandibular third molars.
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In Pell and Gregory's classification, if the occlusal plane of an impacted tooth is between the occlusal plane and the cervical line of the second molar, the type of impaction is:
1) Class A
2) Class B
3) Class C
4) Class D
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#4 Oral Surgery

The Campbell line is an important anatomical reference line used in radiology, particularly in the context of the occipitomental view (also known as the Water's view). This line is drawn from the outer canthus of the eye to the midpoint of the maxillary sinus and is used to assess the position of the maxillary sinuses and other related structures in the skull.

  • Occipitomental view: This view is commonly used in maxillofacial imaging to visualize the maxillary sinuses, orbits, and nasal cavity. The Campbell line helps in evaluating the relationship of these structures.

Transpharyngeal view: This view is used to visualize the pharynx

Transorbital view: This view focuses on the orbits and surrounding structures

Towne view: This view is used to visualize the occipital bone and the base of the skull

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Compbell line is seen in 
1. Transpharyngeal view
2. Transorbital view
3. Occipitomental view
4. Towne view

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#5 Oral Surgery
Minor oral surgery should be performed one day after dialysis in a patient who is on periodic renal dialysis. This is because the patient's platelet count and coagulation factors are usually at their lowest before dialysis, which could increase the risk of bleeding.
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Answer
A patient is on periodic renal dialysis. Minor oral surgery should be performed  
 1. One day before dialysis
 2. On the day of dialysis
 3. One day after dialysis
 4. One week after dialysis
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#6 Oral Surgery
Needle breakage is a rare complication in local anesthesia, but it is most likely to occur during a mandibular nerve block (specifically, the inferior alveolar nerve block). This is because it involves a longer needle insertion into deeper tissues, closer to bone, increasing the risk of the patient suddenly moving or the needle bending and snapping at the hub.
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Answer
The needle is most likely to break when giving
1. infiltration anesthesia
2. posterior superior alveolar block
3. mandibular block
4. long buccal nerve block
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#7 Oral Surgery
A bilateral inferior alveolar nerve block is not inherently contraindicated. It is commonly performed in cases requiring surgery on both sides of the mandible. However, it should be done with caution in patients with certain medical conditions or anatomical variations that could increase the risk of complications. It is important to assess each patient individually before administering the block.
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Answer
A surgical procedure required bilateral block. A bilateral inferior alveolar nerve block is 
 1. Not contraindicated
 2. Should rarely be preformed
 3. May cause space infection
 4. None of the above
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#8 Oral Surgery
Salivary gland stones, or sialoliths (calcified nodules), are most commonly found in the submandibular gland ducts (Wharton's ducts). This is due to several factors: the submandibular gland's saliva is more alkaline, has a higher concentration of calcium and phosphate, and the duct itself is longer and has a more complex, upward course, all of which contribute to the precipitation of salts and stone formation.
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Answer
Calcified nodules are most commonly found in the
1. parotid gland ducts
2. sublingual glands
3. ducts of the submandibular glands
4. parotid glands
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#9 Oral Surgery
Rubber band extraction is specifically indicated for patients with bleeding disorders. This technique involves placing orthodontic elastics around the tooth to create gradual pressure, causing slow strangulation of the periodontal ligament and eventual tooth exfoliation without surgical trauma, thus minimizing bleeding risk in coagulopathic patients.
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Answer
Rubber band extraction is a method of extraction in patients having
1) Bleeding disorders
2) Myocardial infarction and angina pectoris
3) Supernumerary teeth
4) Impacted teeth
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