MDS PREP
The elevators that employ both the lever and wedge principles during extraction of root tip are
1. Pott"s elevators and apex elevators
2. Apex elevators and straight elevator
3. Straight elevators and Pott"s elevators
4. Pott"s elevators and Cryer elevators
Oral Surgery
Answer: 2
The elevators that employ both the lever and wedge principles during extraction of root tip are apex elevators and straight elevator.
Of the following conditions where acrylic splints are advisable during the postoperative phase of management
1) Torus palatinus reduction
2) Mental tubercle reduction
3) Mandibular alveoplasty
4) None of the above
Oral Surgery
Answer: 1
Torus palatinus reduction involves removing a bony prominence from the palate. Acrylic splints provide stabilization, protect the surgical site, and prevent hematoma formation. Other conditions like mandibular alveoplasty do not require splints for similar reasons.
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.
To drain pus from an abscess, the surgeon should
1) Cut an eclipse from the abscess surface to allow for a drain
2) Aspirate the contents
3) Penetrate into abscess cavity & probe with an artery forceps to allow for flow of pus
4) Cut only the mucosa and skin
Oral Surgery
Answer: 3
Proper abscess drainage involves creating an incision to allow pus to drain completely. Probing with an artery forceps ensures complete evacuation of the cavity. Other methods, like simple aspiration or superficial incisions, may not adequately drain the abscess.
The best example of an elevator which works on wheel and axle principle
1. Howarth"s periosteal elevator
2. Winter cross bar elevator
3. Miller"s apexoelevator
4. None of the above
Oral Surgery
Answer: 2
The best example of an elevator which works on wheel and axle principle is Winter cross bar elevator.
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.
Biopsy specimens removed for examinations are immediately placed in
1) 10 % ethanol
2) 10 % formalin
3) Hydrogen peroxide
4) 1 % formalin
Oral Surgery
Answer: 2
Formalin, specifically 10% neutral buffered formalin, is the standard fixative used for preserving biopsy specimens. It helps to maintain the tissue architecture and cellular details, making it suitable for histopathological examination. Ethanol is not typically used for routine tissue fixation as it can cause tissue shrinkage and distortion. Hydrogen peroxide is not a fixative and is used for different purposes, such as disinfection. A 1% formalin solution is too dilute for effective fixation.
Which surgical procedure is carried out to treat TMJ ankylosis?
1. Arthroplasty
2. Condylectomy
3. Discoplasty
4. Capsulorrhaphy
Oral Surgery
Answer: 1
The surgical procedure carried out to treat TMJ ankylosis is arthroplasty.