MDS PREP
Longest acting local anaesthetic is
1. Bupivacaine
2. Tetracaine
3. Lidocaine
4. Both A and B
Oral Surgery
Answer: 4
Longest acting local anaesthetic is Bupivacaine.
Among the following which is advantage of sagittal split osteotomy over transoral vertical subcondylar osteotomy
1) Greater mandibular movement is achieved
2) Because it is intraoral procedure. No external scar is produced
3) Alone may be used to correct a mandibular retrognathism and prognathism
4) Less chance of injuring the inferior dental canal
Oral Surgery
Answer: 3
Among the given choices, the advantage of a sagittal split osteotomy over a transoral vertical subcondylar osteotomy is that it allows for greater mandibular movement. The sagittal split osteotomy is a surgical technique used in orthognathic surgery to reposition the mandible in cases of severe skeletal discrepancies. It involves splitting the mandible along the midline and moving the two halves apart, which can provide significant advancement or setback of the lower jaw. This technique may be used to correct both mandibular prognathism and retrognathism, making it a versatile option in orthognathic surgery. Additionally, it is associated with fewer complications compared to the transoral vertical subcondylar osteotomy, which involves cutting through the medullary bone of the condyle and can pose a higher risk of injury to the facial nerve and other vital structures. However, it's important to note that the choice of surgical approach is determined by the specific case and the individual patient's needs.
During the Gillies approach, the structure of anatomic significance is
1. Superficial temporal artery
2. Marginal mandibular nerve
3. Internal jugular vein
4. Inferior alveolar nerve
Oral Surgery
Answer: 1
The Gillies approach is a surgical technique used in facial reconstruction, particularly for the repair of facial defects. The superficial temporal artery is of significant anatomical importance during this procedure, as it supplies blood to the scalp and face. Surgeons must be cautious to avoid damaging this artery during the approach.
Compbell line is seen in
1. Transpharyngeal view
2. Transorbital view
3. Occipitomental view
4. Towne view
Oral Surgery Answer: 3
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
Frequently which of the following constitutes is amide type local anaesthesia causes allergic reaction
1. Lignocaine hydrochloride
2. Methyl paraben
3. Adrenaline
4. Contaminants in the solution
Oral Surgery
Answer: 2
Methyl paraben frequently causes allergic reactions in amide type local anaesthesia.
The following areas are anaesthetized by the anterior palatine nerve block
1. Part of the upper lip, lateral surface of nose and lower eyelid
2. Posterior portion of hard palate and overlying tissues upto the first premolar
3. Incisors canine and first premolar
4. Both hard and sort palates completely
Oral Surgery
Answer: 2
The anterior palatine nerve block anaesthetizes the posterior portion of the
hard palate and the overlying tissues up to the first premolar. It does not
typically anaesthetize the upper lip, lateral surface of the nose, or lower
eyelid, which are innervated by different branches of the trigeminal nerve.
The effect of local anaesthesia can be increased by the addition of
1) Adrenaline
2) Isoprenaline
3) Dopamine
4) Felypressin
Oral Surgery
Answer: 1
Explanation:
Adrenaline (epinephrine) is commonly added to local anesthetics to prolong their effect and reduce bleeding in the area. It works by constricting blood vessels, which decreases the rate of absorption of the anesthetic into the bloodstream, thereby enhancing its duration of action.
Compbell line is seen in
1) Transpharyngeal view
2) Transorbital view
3) Occipitomental view
4) Towne view
Oral Surgery
Answer: 3
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