MDS PREP
Commnest complication with Risdon and submandibular incision is
1. Damage to marginal mandibular nerve
2. Damage to cervical branch of facial nerve
3. Damage to inferior alveolar nerve
4. Damage to lingual nerve
Oral Surgery
Answer: 1
Commonest complication with Risdon and submandibular incision is damage to marginal mandibular nerve.
Usually hydrolysis of amide type of local anaesthetic salts is facilitated by
1. Tissue pH above 7.0
2. Tissue pH between 5.0 and 7.0
3. Tissue pH below 5.0
4. None of the above
Oral Surgery
Answer: 1
Hydrolysis of amide type of local anaesthetic salts is facilitated by tissue pH above 7.0.
Which of the following is not used as a topical LA?
1. Procaine
2. Tetracaine
3. Lidocaine
4. Benzocaine
Oral Surgery
Answer: 1
Procaine is not used as a topical local anaesthetic.
The tips of anatomic forceps should be placed
1. On the crown portion
2. At the junction of clinical and anatomical crowns
3. Near junction of apical and middle thirds of clinical crown
4. On the root surface as far apically as possible
Oral Surgery
Answer: 4
The tips of anatomic forceps should be placed on the root surface as far apically as possible.
A fracture resulting from the destruction of bone by local or systemic disease is termed
1. greenstick fracture
2. impacted fracture
3. complicated fracture
4. pathological fracture
Oral Surgery
Answer: 4
A pathological fracture occurs when a bone breaks in an area weakened by disease, such as cancer, osteoporosis, or infection. Unlike traumatic fractures, which result from an external force, pathological fractures occur due to underlying conditions that compromise the structural integrity of the bone.
To luxate a tooth with a forceps the movements should be
1. Firm and deliberate primarily to the facial surface with secondary movements to the lingual surface
2. Sharp and definite so periodontal ligament tears easily
3. Figure of "eight" motion
4. None of the above
Oral Surgery
Answer: 1
To luxate a tooth with forceps, the movements should be firm and deliberate primarily to the facial surface with secondary movements to the lingual surface.
Which of the following procedures is best suited to correct bimaxillary protrusion
1. Extraction of four premolars and anterior alveolar segment repositioning
2. Mandibular body osteotomy and posterior maxillary osteotomy
3. Subcondylar osteotomy
4. None of the above
Oral Surgery
Answer: 1
The best procedure to correct bimaxillary protrusion is extraction of four premolars and anterior alveolar segment repositioning. Bimaxillary protrusion is a condition where both the upper and lower jaws are positioned too far forward. This can be corrected by extracting the four premolars (two from the upper and two from the lower jaw) to create space for the teeth to move backward and then repositioning the anterior alveolar segments (the bone and gum tissue holding the front teeth) to achieve a more favorable facial profile and occlusion. This approach addresses the protrusion of both jaws simultaneously and is more effective than the other options listed, which are more targeted at specific jaw issues (mandibular body osteotomy and subcondylar osteotomy) and not as comprehensive for bimaxillary protrusion cases.
Subjective symptom of buccal nerve block is
1. Numbness and tingling sensation of the buccal mucosa
2. Numbness of the lingual mucosa near molars
3. No subjective symptoms
4. A & B
Oral Surgery
Answer: 3
While the buccal nerve block is used to anesthetize the buccal mucosa and buccal
gingival tissues of the maxillary molars, the actual technique does not
typically produce any specific subjective symptoms in the patient other than the
sensation of the needle. The patient may feel numbness if the anesthetic
solution is inadvertently placed in the oral mucosa or if the block is done
improperly.