Pathognomic sign of mandibular fracture

# The most common pathognomic sign of mandibular fracture is:
a) Malocclusion
b) Sublingual hematoma
c) Deviation of the jaw on opening
d) Paraesthesia of the mental nerve

The correct answer is B. Sublingual hematoma.

Sublingual ecchymosis is considered as pathognomonic sign of mandibular fracture.

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Fracture of Mandible treatment

# The ideal treatment for fracture of the angle of mandible is:
a) Transosseous wiring
b) Intermaxillary fixation
c) Plating on the lateral side of the body of the mandible
d) Plating at the inferior border of the mandible

The correct answer is D. Plating at the inferior border of the mandible.

Compression plates are used at inferior border of mandible below the inferior dental canal. If there is opening of the upper border, it is necessary to apply a tension band in the form of arch bar or miniplates at the upper border.


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Gowgates technique Landmarks

# Extra-oral landmark for Gowgates technique of mandibular nerve block:
a) Corner of the mouth
b) Intertragic notch
c) Both of the above
d) None of the above

The correct answer is C. Both of the above

Landmarks for Gow-Gates technique:
a. Extraoral:
• Lower border of tragus (intertragic notch); • Corner of mouth
• Mesiolingual cusp of maxillary 2nd molar

 b. Intraoral:
• Height of injection established by placement of the needle tip just below the mesiolingual (mesiopalatal) cusp of maxillary second molar.
• Penetration of soft tissues just distal to the maxillary second molar at the highest established in the preceding step.

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Long duration of anesthesia

# Long duration anesthesia is achieved by:
a) 2% Lidocaine HCL +Epinephrine 1:200000
b) 3% Mepivacaine HCL
c) 4% Prilocaine HCL +Epinephrine 1:200000
d) 0.5% Bupivacaine+ Epinephrine 1:200000

The correct answer is D. 0.5% Bupivacaine+ Epinephrine 1:200000

Short Duration (pulpal anesthesia approximately 30 Minutes)
• Mepivacaine HCl 3%
- Prilocaine HCl 4% (by infiltration)

Intermediate Duration (Pulpal anesthesia approximately 60 Minutes) 
• Articaine HCL 4% + epinephrine 1:100,000 • Articaine HCl 4% +epinephrine 1:200,000
• Lidocaine HCl 2% +epinephrine 1:50,000
• Lidocaine HCl 2% +epinephrine 1:100,000
• Mepivacaine HCl 2% + levonordefrin 1:20,000
• Prilocaine HCl 4% (via nerve block only)
• Prilocaine HCl 4% +epinephrine 1:200,000

 Long Duration (Pulpal anesthesia approximately 90+ Minutes) 
• Bupivacaine HCl 0.5% + epinephrine 1:200,000 (by nerve block)

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