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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Muscle pierced while giving IANB

#Which of the following muscles is pierced by the needle while giving an inferior alveolar nerve block?
a) Medial pterygoid
b) Temporalis
c) Superior constrictor
d) Buccinator

The correct answer is D. Buccinator.

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Non rigid Connectors, Fixed Partial Dentures

# The non-rigid connectors are used in the construction of FPD when the span is:
a) Short, supplementing alveolar ridge reduction
b) Short supplementing alveolar ridge reduction not required
c) Long, supplementing alveolar ridge reduction
d) Long, supplementing alveolar ridge reduction not required

• The correct answer is B. Short supplementing alveolar ridge reduction not required

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Gingival finish line on tipped molar

# The gingival finish line on a tipped molar should be:
a) Shoulder
b) Chamfer
c) Knife edge
d) Feather edge

The correct answer is C. Knife edge.

When molars are tipped or rotated, a reverse 3/4th crown is indicated.

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Egg shaped Pontic

# Egg-shaped pontic is indicated for the replacement of:
a) Mandibular posteriors
b) Mandibular anteriors
c) Maxillary posteriors
d) Maxillary anteriors

The correct answer is A. Mandibular posteriors.

In the mandibular posterior region where esthetics is not a major consideration, spheroidal pontic (egg shaped pontic) is the design of choice because of its contour.

In the maxilla, modified ridge lap design satisfies both esthetics and hygiene so it is the pontic design of choice in both anterior and posterior region.

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Minimum amount of Taper

# What is minimum of amount of taper that should be maintained for an ideal tooth preparation?
a) 4 Degree
b) 5 Degree
c) 6 Degree
d) 12 Degree

The correct answer is D. 12 degrees.

Some important points on tapers:
• The relationship of one wall of preparation to the long axis of that preparation is the inclination of that wall. • Sum of the inclination of two opposing walls gives the taper of the preparation.
• Recommended taper is 3-12 degree. According to Schillinberg 6 degree is recommended.
• Minimum taper that is necessary to insure the absence of undercuts -12 degree.
• A taper or total convergence of 16 degrees has been proposed as being achievable clinically while still affording adequate retention. This probably an acceptable overall target. It can be as low as 10 degree on preparations of anterior teeth and as high as 22 degrees on molars.

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