ZONES OF DENTINAL CARIES | ||
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ZONE 1 | Normal Dentin | |
Zone 2 | Subtransarent Dentin |
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Zone 3 | Transparent dentin |
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Zone 4 | Turbid dentin |
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Zone 5 | Infected Dentin |
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Zones of Dentinal Caries
# Whenever the caries cone in enamel is larger or at least the same size as that in dentin, it is called as:
# Whenever the caries cone in enamel is larger or at least the same size as that in dentin, it is called as:
A. Residual caries
B. Recurrent caries
C. Forward caries
D. Backward caries
A. Residual caries
B. Recurrent caries
C. Forward caries
D. Backward caries
Forward Caries. Forward caries is where the caries cone in enamel is larger or at least the same size as that in dentin.
Backward Caries. When the spread of caries along the DEJ exceeds the caries in the contiguous enamel, caries extends into this enamel from the junction.
Ans is C: Forward caries (Ref: Sturdevant's Art and science of operative dentistry 4th ed., p 274)
# DPT vaccine does not provide immunity against:
# DPT vaccine does not provide immunity against:
A. Tetanus
B. Diphtheria
C. Polio
D. Whooping cough
A. Tetanus
B. Diphtheria
C. Polio
D. Whooping cough
The correct answer is C. Polio.
The vaccine DPT stands for Diphtheria, Pertusis (Whooping cough) and Tetanus.
# I.V. Diazepam in a patient on a dental chair can cause: [AIIMS 2007 NOV]
# I.V. Diazepam in a patient on a dental chair can cause: [AIIMS 2007 NOV]
A. Tinel’s Sign
B. Verrill’s Sign
C. Bell’s sign
D. Coleman’s sign
A. Tinel’s Sign
B. Verrill’s Sign
C. Bell’s sign
D. Coleman’s sign
The correct answer is B. Verrill's Sign.
Verrill's sign has 3 Symptoms which indicate the correct level after diazepam sedation.
- 50% eyelid ptosis
- Blurring of vision
- Slurring of speech
# Tinel's Sign: Tinel sign was used earlier as an indicator of the start of the nerve regeneration. It is elicited by percussion over the divided nerve, which result in tingling sensation in part supplied by peripheral section.
# Coleman's sign: Seen in mandibular fractures. Ecchymosis in the lingual sulcus is pathognomic of mandibular fracture.
# Bell's Sign: Bell's phenomenon (also known as the palpebral oculogyric reflex) is a medical sign that allows observers to notice an upward and outward movement of the eye, when an attempt is made to close the eyes. The upward movement of the eye is present in the majority of the population, and is a defensive mechanism.
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