The small ridges, perikymata, seen on facial surfaces of canines are the result of_____________?

Related Mcqs:

1. The incisal edges and the incisal thirds of facial surfaces of mandibular incisors and canines generally oppose lingual surfaces of maxillary incisor and canines _____________?

   A. Within the incisor thirds
   B. At the junction of middle and cervical thirds
   C. At the linguo cervical ridges
   D. Immediately incisal to cingulam

2. perikymata are the external surface manifestations of_____________?

   A. Enamel rods
   B. Incremental lines of retzius
   C. Nasmyth’s membrane
   D. Pellicle

3. A 60 year old male presents with a 2 day history of a severe left ear ache with a burning sensation in the ear and loss of taste. There is left sided weakness of both upper and lower facial muscles. Facial sensation is normal. A few vesicles are seen in the pharynx. What is the most likely diagnosis ?

   A. Bell’s palsy
   B. Acoustic neuroma
   C. Diphtheria
   D. Ramsay Hunt syndrome

4. The Sensitive period for tetracycline induced discolouration in the permanent maxillary mandibular incisors and canines is________________?

   A. 3 months postpartum to 7th year of life
   B. 4 months in utero to 3 months postpartum
   C. 5 months in utero to 9 months postpartum
   D. Birth to 7th year

5. Posterior embrasures are generally larger on the lingual than on the facial, with the contact area within the facial moiety, except between maxillary_______________?

   A. Premolars
   B. 1st and 2ndmolar
   C. 1st premolar and cane
   D. First molar and 2nd premolar

6. Malonyl aciduria is seen in deficiency of_____________?

   A. Pyridoxine
   B. B12
   C. Folic acid
   D. Riboflavin

7. Increase in lactate and pyruvate is seen in deficiency of_____________?

   A. Pyridoxin
   B. Niacin
   C. Thiamine
   D. Retinotic acid

8. Hepatolenticular degeneration is seen with deposition of_____________?

   A. cadmium
   B. lead
   C. aluminium
   D. copper

9. Hemosiderin pricticles are seen histologically in case of_____________?

   A. Fibroma
   B. Pregancy tumor
   C. Peripheral giant cell granuloma
   D. Papilloma

10. Mosaic pattern of bone is seen in radiographic features of_____________?

    A. fibrous dysplasia
    B. paget’s disease
    C. Osteopetrosis
    D. Osteogenesis imperfecta