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Filtration of X ray Beam

# What is the function of the filtration process while taking radiographs?
A. Remove the short wavelength photons
B. Remove the portion of long wavelength photons
C. To increase the radiation dose to the patient
D. To increase the scatter of secondary radiation



The correct answer is: B. 

X-ray photons with short-wavelength have high penetration energy and are useful for diagnostic radiology X-ray photons of long-wavelength have low penetration energy and contribute to patient exposure only. These photons are removed by keeping aluminum filters in their path. The half-value layer is about 1.5 mm for an X-ray tube of 70 kVp and is about 2.5 mm for higher voltages.

Paired and Unpaired Sinuses

# Which one of the following is an unpaired sinus?
A. Cavernous sinus
B. Sigmoid sinus
C. Straight sinus
D. Superior petrosal sinus



The correct answer is C. Straight Sinus.

Venous sinuses of dura mater are:
Paired - 1. Cavernous sinus, 2. Superior petrosal sinus, 3. Inferior petrosal sinus, 4. Transverse sinus, 5. Sigmoid sinus, 6. Sphenoparietal sinus, 7. Petrosquamous sinus, 8. Middle meningeal sinus

Unpaired:
1. Superior sagittal sinus, 2. Inferior sagittal sinus, 3. Straight sinus, 4. Occipital sinus, 5. Anterior intercavernous sinus, 6. Posterior intercavernous sinus, 7. Basilar plexus of veins, 8. Sphenoid air sinus

Mixed tumors of the salivary glands

# Mixed tumors of the salivary glands are:
A. Most Common in Submandibular gland
B. Usually malignant
C.Most Common In parotid gland
D. Associated with calculi


The correct answer is C. Most Common in parotid gland. 

PROSTHODONTICS PAST QUESTIONS- AUGUST 2013 FOURTH YEAR B.D.S. DEGREE EXAM

[LD 675]                                      AUGUST 2013                              Sub. Code:
4183 FOURTH YEAR B.D.S. DEGREE EXAM
PAPER – V PROSTHODONTICS AND CROWN AND BRIDGE
Q .P .Code: 544183
Time: 180 Minutes                                                        Maximum: 70 Marks

I. Elaborate on:                                                                        (2x10=20)

1. Define centric relation. Discuss the different types of centric relation procedure.
2. Discuss the method of preparation to receive a jacket crown in central incisor (PORCELAIN).

II. Write Notes on:                                                                   (10x5=50)
1.  survey line and its uses
2.  Zirconia porcelain
3.  Anatomic teeth
4.  Kennedy class two design-Maxillary
5.  Gingival Fluid control
6.  Impression Techniques in removable partial dentures
7.  Root form implants
8.  Immediate dentures
9.  Selective pressure impression technique
10. Arcon articulators
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