MDS PREP
In endodontic surgery, which of the following about chromic gut suture is not true
1. Its properties are inferior to plain gut suture
2. It is coated with chromium tri-oxide
3. It is less biocompatible than plain gut suture
4. Its absorption is faster than the plain gut sutures
Oral Surgery
Answer: 4
In endodontic surgery, the statement that chromic gut suture has faster absorption than plain gut sutures is not true.
A high level fracture that extends across the orbits through the base of the nose and the ethmoid bone to the zygomatic arches is termed
1. Le Fort I fracture
2. horizontal fracture
3. pyramidal fracture
4. Le Fort Ill fracture
Oral Surgery
Answer: 4
Le Fort III fractures are characterized by a fracture pattern that involves the separation of the facial skeleton from the cranial base. This type of fracture typically extends across the orbits and involves the zygomatic arches, leading to significant facial disfigurement and potential complications.
Lidocaine is used more commonly in dentistry because lidocaine
1. Causes less depression of CNS
2. Causes less cardiovascular collapse
3. Causes lesser incidence of allergic reactions
4. Is 50 times more potent than procaine
Oral Surgery
Answer: 3
Lidocaine is used more commonly in dentistry because it causes lesser incidence of allergic reactions.
The primary airway hazard for an unconscious patient in a supine position is
1) Tongue obstruction
2) Bronchospasm
3) Laryngospasm
4) Aspiration
Oral Surgery
Answer: 1
In an unconscious patient lying supine, the tongue can fall back and obstruct
the airway due to loss of muscle tone. This is the most common airway hazard in
this position.
To perform tracheostomy entry should be made at the
1) Cricothyroid ligament
2) Thyroid membrane
3) Thyroid notch
4) Cricoid cartilage
Oral Surgery
Answer: 1
A tracheostomy is a surgical procedure that involves creating an opening in
the trachea (windpipe) to facilitate breathing. The preferred site for making
the incision during a tracheostomy is the cricothyroid ligament,
which is located between the cricoid and thyroid cartilages.
Cricothyroid ligament: This ligament is relatively
superficial and provides a safe access point to the airway, especially in
emergency situations. It is often chosen for emergency tracheostomy because
it is easier to locate and access quickly.
A straight elevator is properly used to advantage when the
1. Adjacent tooth is the fulcrum
2. Tooth is isolated tooth
3. Interdental bone is fulcrum
4. Adjacent tooth is not to be extracted
Oral Surgery
Answer: 3
The straight elevator is properly used to advantage when the interdental bone is
used as a fulcrum. This is because the straight elevator can be inserted into
the periodontal ligament space along the long axis of the tooth, and when
levered against the interdental bone, it helps in lifting the tooth from the
socket. Using the adjacent tooth as a fulcrum can potentially damage it.
Alpha adrenergic agonists are used in combination with local anaesthetics to
1. Increase the rate of liver metabolism of local anaesthetic
2. Increase the concentration of LA at receptor site
3. Both the above
4. None of the above
Oral Surgery
Answer: 2
Alpha adrenergic agonists are used in combination with local anaesthetics to increase the concentration of LA at receptor site.
Which of the following is not an advantage of marsupialisation
1) Exposure of very little bone
2) Preservating of vital structure
3) Rapid healing
4) Conserve surgical structures
Oral Surgery
Answer: 3
Marsupialization is a surgical procedure often used for cysts or abscesses. While it does have several advantages, such as minimal exposure of bone and preservation of vital structures, it is not typically associated with rapid healing. The healing process can be prolonged compared to other surgical techniques because it involves creating a permanent opening for drainage, which may take time to close completely.