Auspitz’s sign is characteristic of

 # Auspitz’s sign is characteristic of 

A. Lichen planus 

B. White sponge nevus 

C. Erythema multiforme 

D. Psoriasis 

The correct answer is D. Psoriasis.

Psoriasis of the skin is characterized by the occurrence of small, sharply delineated, dry papules, each

covered by a delicate silvery scale which has been described as resembling a thin layer of mica. If the deep scales are removed, one or more tiny bleeding points are disclosed, a characteristic feature termed Auspitz’s sign. After removal of the scale the surface of the skin is red and dusky in appearance.

Reference: Shafer's Textbook of Oral Pathology

Splitted papule at corner of mouth is seen in:

 # Splitted papule at corner of mouth is seen in 

A. Primary syphilis 

B. Secondary syphilis 

C. Recurrent herpetic stomatitis 

D. Recurrent herpes labialis 

The correct answer is B. Secondary syphilis.

Typical oral lesions in secondary syphilis are described as a mucous patch, which presents as thickened whitish plaque affecting the oral mucosa. Necrosis and sloughing may occur. Commonly affected sites include the tongue, lip, buccal mucosa, and palate. These patients may also present with mucosal ulcers and erythematous macular lesions.

Ref: Burket's Oral Medicine

The earliest response of pulpitis is:

 # The earliest response of pulpitis is:

A. Cyst formation

B. Calcification

C. Hyalinization

D. Formation of dental granuloma

The correct answer is C. Hyalinization.

Sterile necrosis is called as hyalinization. 

- Focal pulpitis is characterized microscopically by dilatation of the pulp vessels. 

- Edema fluid may collect because of damage to the capillary walls, allowing actual extravasation of red blood cells or some diapedesis of white blood cells. 

- Slowing of the blood flow and hemoconcentration due to transudation of fluid from the vessels conceivably could cause thrombosis. 

Orthodontics is the branch of dentistry concerned with:

 # Orthodontics is the branch of dentistry concerned with: 

A. Prevention and correction of malocclusion

B. Prevention, interception and correction of malocclusion and other dentofacial abnormalities

C. Interception and correction of malocclusion

D. Prevention and interception of malocclusion

The correct answer is B. Prevention, interception and correction of malocclusion and other dentofacial abnormalities.

Orthodontics is the branch of dentistry concerned with the growth of the face, development of occlusion

and the prevention and correction of occlusal anomalies/ abnormalities. The term “orthodontics” comes from Greek: “orthos” meaning right or correct and “odontos” meaning tooth. The term ‘orthodontics’ was first coined by Le Felon in 1839. 

Jackson has summarized the aims of orthodontic treatment that are popularly known as Jackson’s Triad. They are:

i. Functional efficiency

ii. Structural balance

iii. Esthetic harmony.

The general field of orthodontics can be divided into the following three categories based on the nature and time of intervention:

- Preventive orthodontics

- Interceptive orthodontics

- Corrective orthodontics.

Negative space with respect to buccal corridors is an indication for

 # Negative space with respect to buccal corridors is an indication for:

A. Intrusion of maxilla

B. Distalization of molar

C. Expansion of arches

D. Constriction of arches

The correct answer is C. Expansion of arches.

Buccal corridor space is defined as visible maxillary dentition width/ Oral aperture width. The buccal corridor is measured from the mesial line angle of the maxillary first premolars to the interior portion of the commissure of the lips. So negative buccal corridor space indicated mesial-distal width of teeth is less or oral aperture is wide; so arch needs expansion. 

Anchorage conservation is needed most:

 # Anchorage conservation is needed most:

A. Initial alignment  and leveling 

B. Finishing and detailing 

C. Canine retraction if  anterior space closure is done in 2 stage 

D. In case of enmass retraction 

The correct answer is A. Initial alignment and leveling.

Type of tooth movement:  Anchorage varies with the type of tooth movement, whereby, bodily movement requires more anchorage than tipping. The current system of pre-adjusted appliance requires high demands of anchorage during initial stages of the treatment since the first few wires tend to unravel malocclusion according to the expression of bracket prescription whereby tooth axis alignment, tip and crowding are being unravelled simultaneously to bring the teeth in a position called 'slot line up'. 

Chief disadvantage of a nonfunctional fixed space maintainer

 # What is the chief disadvantage of a nonfunctional fixed space maintainer?

A. Prevent lateral jaw growth

B. Difficult to fabricate

C. Difficulty in maintaining proper oral hygiene

D. Continued eruption of opposing tooth

The correct answer is D. Continued eruption of opposing tooth.

Supra eruption of opposing teeth can take place if pontics are not used i.e. non functional fixed space maintainer is used. 

Other disadvantages of fixed space maintainer:

- Expert skill and elaborate instrumentation is needed 

- Decalcification of tooth under bands 

- If functional (pontics) space maintainer is used, it can interfere with vertical eruption of abutment tooth and prevents eruption of replacing permanent teeth if the patient fails to report.