MDS PREP
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.
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.
Among the following which nerve innervates the buccal gingiva of the maxillary second premolar?
1. Anterior palatine nerve
2. Buccal nerve
3. Middle superior alveolar nerve
4. Posterior palatine nerve
Oral Surgery
Answer: 3
The middle superior alveolar nerve (MSA) is one of the branches of the maxillary
nerve that innervates the buccal gingival of the maxillary teeth, including the
second premolar. The anterior palatine nerve innervates the palatal aspect,
while the buccal nerve innervates the buccal mucosa and the anterior part of the
palate.
Among the following which is treatment of choice for infection with fluctuation in an afebrile patient (or) A patient has a localized infection with pus formation. Treatment of choice is
1) Administration of antibiotics
2) Application of hot packs to the area
3) Incision and drainage
4) Antibiotics administration followed by I & D
Oral Surgery
Answer: 3
The treatment of choice for a patient with a localized infection and pus formation, especially if they are afebrile (without fever), is incision and drainage (I & D). This involves creating a small opening in the skin to allow the pus to drain out. While antibiotics can be used as an adjunctive therapy to prevent the spread of infection, they are not always necessary in the initial management of a localized abscess if it is managed effectively with I & D.
Most commonly used local anaesthesia
1. 1: 20,000 xylocaine HCL
2. 1: 50,000 xylocaine HCL
3. 1: 10,000 xylocaine HCL
4. 1: 80,000 xylocaine HCL
Oral Surgery
Answer: 4
Most commonly used local anaesthesia is 1: 80,000 xylocaine HCL.
The longest acting, most potent and most toxic LA is
1) Lidocaine
2) Dibucaine
3) Bupivacaine
4) Tetracaine
Oral Surgery
Answer: 2
Dibucaine (cinchocaine) is a highly potent and long-acting local anesthetic with high toxicity. It is often used in topical applications but is avoided for systemic use due to its high risk of adverse effects compared to alternatives like bupivacaine.
For extraoral maxillary nerve block the target is
1. Anterior to lateral pterygoid plate
2. Posterior to lateral pterygoid plate
3. Pterygomandibular fossa
4. Pterygomandibular fissure
Oral Surgery
Answer: 1
Anterior to lateral pterygoid plate. In the extraoral maxillary nerve block, the
needle is inserted at the posterior aspect of the condylar neck and directed
anteriorly to target the pterygomandibular space, which contains the maxillary
nerve and its branches. This technique is used to anesthetize the molars and
premolars of the upper jaw and is also known as the Vazirani-Akinosi technique.
Diplopia is most common with
1. Mandibular fracture
2. Craniofacial dysjunction
3. Nasal fractures
4. Zygomatico maxillary complex
Oral Surgery
Answer: 4
Diplopia, or double vision, can occur due to various types of facial fractures, particularly those involving the zygomaticomaxillary complex (ZMC). Fractures in this area can lead to muscle entrapment or damage to the extraocular muscles, resulting in misalignment of the eyes and subsequent diplopia. The ZMC is a critical area for the stability of the orbit and the surrounding structures, making it a common site for such complications.