MDS PREP
All of the following statements about an intraoral dental X-ray film are true except
1. It is composed of a cellulose acetate base coated with a silver bromide emulsion
2. It has a thin sheet of lead foil that lies in front of the film to prevent overexposure
3. It has an embossed dot on it which should be orientated towards the source of X-rays
4. It is exposed by the direct action of X-rays on the emulsion
Oral Pathology
Answer: 2
The statement about the lead foil is incorrect; it lies behind the film to prevent backscatter.
A 23-year-old female presented with jaundice and pallor for 2 months. Her peripheral blood smear shows the presence of spherocytes. The most relevant investigation to arrive at a diagnosis is -
1) Reticulocyte count
2) Osmotic fragility test
3) Coombs test
4) Tests for PNH
General Pathology
Answer: 3
The osmotic fragility test is the most relevant investigation for diagnosing hereditary spherocytosis, as it assesses the red blood cells' ability to withstand osmotic stress.
Lession of facial nerve at level of stylomastoid foramen leads to
1. Loss of taste sensation from anterior 2/3 of tongue
2. Paralysis of orbicularis oculi muscle
3. Losss of innervation to stapedius
4. Loss of lacrimal secretion
Lesion of the facial nerve at the stylomastoid foramen leads to paralysis of the orbicularis oculi muscle.
Patient giving history of thrombocytopenic purpura reports for extraction. What could be the most common postoperative complication?
1. Oedema
2. Haemorrhage
3. Infection spreading through tissue spaces
4. Dry socket
Oral Pathology
Answer: 2
The most common postoperative complication in thrombocytopenic purpura is hemorrhage.
Palatal petechiae t are present in
1. hyperthyroidism
2. infectious mononucleosis
3. osteopetrosis
4. hypophosphatasia
Oral Pathology
Answer: 2
Palatal petechiae are often seen in infectious mononucleosis, which is caused by the Epstein-Barr virus.
Which of the following is NOT associated with Reiter's syndrome?
1) Sexually transmitted infection
2) Diarrhea
3) Arthritis
4) Thyroid disorder
Thyroid disorder is not associated with Reiter's syndrome; it is linked to infections such as sexually transmitted infections and diarrhea.
Hereditary spherocytosis is due to deficiency -
1) Spectrin
2) Invertin
3) Cytokeratin
4) All of the above
General Pathology
Answer: 1
Hereditary spherocytosis is primarily due to a deficiency of spectrin, a protein that helps maintain the integrity of the red blood cell membrane.
The main purpose of intensifying screens in extraoral radiographic films is
1. To increase the contrast of film
2. To increase the exposure time
3. To decrease the speed of film
4. Decrease secondary radiation to patient
Oral Pathology
Answer: 4
The main purpose of intensifying screens is to decrease secondary radiation to the patient.