Different Types of Pain : Anesthesia. Hyperaesthesia, Paraesthesia, Allodynia, etc.

TAXONOMY OF PAIN

Terminology	Description
Anesthesia dolorosa	It is a paradoxic pain in the region of sensory loss following an injury to a cranial nerve or a nerve root. It is seen most often after surgical treatment of the trigeminal ganglion or root for neuralgia.
Allodynia	Pain due to non painful stimulus that does not normally produce pain.
Hyperalgesia	Increased response to a stimulus that is usually painful
Hyperaesthesia	Increased sensitivity to stimulation and does not imply a painful sensation. Hyperalgesia is a special case of hyperaesthesia.
Hypoaesthesia	Decreased sensitivity to stimulation
Hypoalgesia	A special case of hypoaesthesia in which pain response to normally painful stimuli is diminished.
Paraesthesia	Abnormal (but not unpleasant) sensation
Dysesthesia	Unpleasant abnormal sensation
Hyperpathia	It is painful syndrome with increased reaction to a stimulus and an increased threshold; faulty identification and localization of stimulus; delayed and radiating sensations and after sensation may be present.
Causalgia	It is a syndrome of: Burning Pain, Allodynia, and Hyperpathia after a traumatic nerve lesion.
Phantom pain	Described as perceptions that an individual experiences relating to a limb or an organ that is not physically part of the body. For example, Limb loss as a result of either amputation following surgery or congenital absence of limb. Phantom limb pain is the feeling of pain in an absent limb or a portion of a limb.

Polishing Agents in Dentistry

Agent	Uses
Pumice	Smoothening dentures, polishing of artificial teeth
Zinc Oxide	Polishing of amalgam restorations
Rouge (Tin oxide)	Polishing of noble metal alloys
Zirconium Silicate	Prophylactic paste for polishing natural teeth
Chromic Oxide	Polishing Stainless steel
Corundum (White form of Al2O3)	Grinding of metal alloys

Most Common Sites of Some Important Pathologies : Oral Cancer, Cysts, Tumors etc.

Condition	Most Common Site
Enameloma	Bifurcation and trifurcation of maxillary posterior teeth
Composite compound odontoma Adenomatoid odontogenic tumor Squamous odontogenic tumor	Anterior maxilla
Composite Complex Odontoma	Posterior maxilla

MCQs on Biostatistics Part 1

# Which of the following correlates highest correlation between variables ?
A. r= + 0.25
B. r= + 0.5
C. r= - 0.75
D. r= + 2

# The arithmetical average of a number of observations is called :
A. Mean
B. Median
C. Range
D. All of the above

# Which of the following is not a measure of central tendency ?
A. Mean
B. Mode
C. Range
D. Median

# The levels of nicotine in 6 cigarettes were 13.0, 11.8, 15.4, 17.4, 31.2 and 24.3 mg. The mean of these values is:
A. 14.9
B. 15.9
C. 18.6
D. 8.4

# Father of Health Statistics is:
A. John Snow
B. John Graunt
C. Frederick Mc Kay
D. Pierre Fauchard

# Ranking students from the individual with the highest Grade points average (GPA) to the lowest is an example of:
A. Ordinal Scale
B. Nominal Scale
C. Interval Scale
D. Ratio Scale

# A random sample suggests that :
A. A person in a control group will not be a member of the experimental group
B. Any member of a group to be studied has an equal opportunity to be included in the study
C. Every nth name on a list is selected
D. Subjects are volunteers

# A stastistical test which indicates the chance or probability of an observed difference between two means occuring by chance is called:
A. Tests of significance
B. Means
C. Ratio
D. Normalcy

# Best measure for central tendency in a highly skewed distribution is :
A. Median
B. Mean
C. Mode
D. Range

# The graphic representation of frequency distribution with X and Y axis is :
A. Frequency polygon
B. Histogram
C. Pictograph
D. Pie diagram

> # A series may have all except :
A. No mode
B. One mode
C. Many modes
D. Negative mode

# The correlation coefficient can range from :
A. 0 to +1
B. 0 to -1
C. -1 to +1
D. 0 to 100

# As the sample size increases, standard deviation :
A. Decreases
B. Increases
C. Remains the same
D. May increase or decrease

# In a 3*3 table, the number of degrees of freedom is:
A. 4
B. 9
C. 3
D. 81

# Most of the values in data spread along the :
A. Mean
B. Mode
C. Median
D. Arithmatic mean

Local Anesthetic Techniques

Technique	Features
1. Infiltration	Also called as submucosal analgesia. Terminal branches or free nerve endings are anesthetized. Only that area into which the local anesthetic solution is infiltrated is anesthetized.
2. Field Block	Large Terminal Branches are anesthetized.
a) Paraperiosteal	Most commonly used technique. The solution is deposited alongside the periosteum. It is indicated widely in the porous maxilla than in the dense mandible.
b) Interosseous	Means injecting directly into the bone. Painful and dangerous procedure. It is not commonly used.
c) Interseptal	It is most effective in children and young adults. LA is injected into the thin porous interseptal bone.
d) Intraligamentary	Most effective for anesthetizing single tooth by injecting LA into the periodontal ligament under high pressure.
e) Intrapulpal	LA is injected into the pulp chamber. The needle should be wedged firmly.

Must know Facts about Local Anesthetics / LA

This table lists some unique properties of local anesthetic agents.

Properties	Local Anesthetic
Natural local anesthetic agent	Cocaine
Local anesthetic agent with intrinsic vasoconstriction property	Cocaine
LA which is most dilating of all	Procaine

List of Medical Syndromes and their Important Features

1. Developmental Disturbances

Syndrome	Important Features
Parry Romberg's Syndrome	Facial Hemiatrophy
Vander Woude's Syndrome	Pits of lower lip and cleft of palate
Ascher's Syndrome	Acquired double lip + Blepharochalasis + Non toxic thyroid enlargement
Oro Facial Digital Syndrome	Cleft tongue nd clefting of mandibular alveolar process
Median Cleft Face Syndrome	Hypertelorism + Median cleft of premaxilla, palate + Cranium bifidum occultum
Meischer's Syndrome	Cheilitis granulomatosa