Cytologic smears and the findings of characteristic multinucleated giant cells (Tzanck test) are helpful in the diagnosis of:

 # Cytologic smears and the findings of characteristic multinucleated giant cells (Tzanck test) are helpful in the diagnosis of:

A. Chicken pox

B. Mumps

C. Psoriasis

D. Herpes Zoster

The correct answer is D. Herpes Zoster.

Herpes zoster can frequently be recognized by the characteristic distribution of the lesions, although there may be a similarity to the lesions of herpes simplex infection. Skin lesions and oral lesions in particular may be easily identified as viral diseases by cytologic smears and the finding of characteristic multinucleated giant cells (Tzanck test) and intranuclear inclusions. However, this does not differentiate between herpes zoster and herpes simplex. This can only be done by fluorescent antibody staining techniques, viral culture or serologic diagnosis.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 351

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Which of the following compulsorily involves two teeth?

 # Which of the following compulsorily involves two teeth?

A. Dilaceration

B. Gemination

C. Taurodontism

D. Concrescence

The correct answer is D. Concrescence.

Concrescence of teeth is actually a form of fusion which occurs after root formation has been completed. In this condition, teeth are united by cementum only. It is thought to arise as a result of traumatic injury or crowding of teeth with resorption of the interdental bone so that the two roots are in approximate contact and become fused by the deposition of cementum between them. Concrescence may occur before or after the teeth have erupted, and although it usually involves only two teeth, there is at least one case on record of union of three teeth by cementum.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 41

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The most frequent sequelae of gingivitis is:

 # The most frequent sequelae of gingivitis is:

A. Gingivosis

B. Periodontosis

C. Periodontitis

D. Gingival atrophy

The correct answer is C. Periodontitis.

Studies of gingivitis support the conclusion that disease development is associated with selected alterations in the microbial composition of dental plaque and not just the result of an accumulation of plaque. Gingivitis was generally thought to precede the development of chronic periodontitis; however, many individuals demonstrate long-standing gingivitis that never advances to the destruction of the periodontal attachment.

Reference: Carranza's Clinical Periodontology, 12th Edition, Page no: 163

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What is usually done with an ‘eruptive cyst’ in the area of the second molar in a two year old child?

 # What is usually done with an ‘eruptive cyst’ in the area of the second molar in a two year old child?

A. Observe

B. Incise and drain

C. Excise

D. Fenestrate

The correct answer is A. Observe.

No treatment is necessary as the eruption cyst often ruptures spontaneously. Surgically exposing the crown of the tooth may aid the eruption process.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 263

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