A. Severe flurosis
B. Trauma at the time of birth
C. congenital syphilis
D. Due to chronic suppurative abscess in over lying gingival tissue
Related Mcqs:
- A histologic evidence of widespread formation of globular hypocalcified dentin and pulp horns reaching the dentinoenamel junction, absence of lamina dura around the tooth in radiograph are the characteristic features of_____________?
A. Vitamin -D resistant rickets
B. Hypophosphatasia
C. Hypervitaminosis-A
D. Vitamin-A deficiency - A five-year old child presents with chronic bed wetting and bilateral loose deciduous first molars. His mother says that she want to drink of water several times during each night. Which of the following is the most likely diagnosis ?
A. Hand-Schuller Christian disease
B. Marble bone diasease
C. Nieman pick disease
D. Polyostotic fibrous dysplasia - Mosaic pattern of bone is seen in radiographic features of_____________?
A. fibrous dysplasia
B. paget’s disease
C. Osteopetrosis
D. Osteogenesis imperfecta - The most constant and valuable trait to differentiate among maxillary first, second and third molars i____________?
A. Number of roots
B. Depth of central fossae
C. Comparative size of the cusp of carabelli
D. Relative position of the distolingual grooves - According to Schour & Massler the crown completion of both permanent maxillary and mandibular first molars is________________?
A. 1½ 2 years
B. 2½ – 3 years
C. 3-4 years
D. 3-5 years - Crown formation of all permanent teeth except third molars is completed between_____________?
A. Birth to 8 years
B. Birth to 12 years
C. Birth to 6 years
D. 6 years to 12 years - Growth of all permanent teeth except last molars is completed by___________?
A. 6 years
B. 8 years
C. 12 years
D. 17 years - First permanent molars begin to calcify at ______________?
A. 6 months of intra utrerine life
B. At birth
C. Before decidous incisors
D. About 1 year after birth - Calcification of all teeth except last molars are completed by____________?
A. 2 years
B. 4 years
C. 6 years
D. 8 years - Which of the following decidous molars bears the greatest resemblance to a premolar _____________?
A. Maxillary first
B. Maxillary second
C. Mandibular first
D. Mandibular second
