MD Central incisors

• initiation of calcification of central incisor?

  3.5 months
• crown complete of central incisors?

  4.5 years
• eruption of CI?

  6.5 years
• root complete of CI?

  9 years
• there are four mandibular incisors?

  2 CI and 2 LI
• the central and lateral incisors appear quite similar although the _ is larger?

  lateral incisors
• being the mandibular central incisor the _ tooth in the oral cavity?

  smallest
• viewed from the proximal surface, the mandibular incisors have

  the same wedge shape as the maxillary incisors, and so are

  suited for?

  incising food
• the FDI of right mandibular central incisor?

  41
• the FDI of left mandibular central incisor?

  31
• the Palmer's of right mandibular central incisor?

  1 ⏋
• the Palmer's of left mandibular central incisor?

  ⎾ 1
• the universal of right mandibular central incisor?

  25
• the universal of left mandibular central incisor?

  24
• _symmetric from labial or lingual view?

  bilaterally
• does central incisor has developmental groove or depression in crown?

  none
• how many antagonist does central incisor has?

  1
• mandibular central incisor and the ___ are the only teeth

  that have one antagonist?

  maxillary third molar
• Location of Contact Area in mesial?

  incisal angle
• Location of Contact Area in distal?

  incisal angle
• crown outline of Md Central incisor?

  trapezoidal
• Incisal edge: _ and at __ to

  (_ to) the long axis line of the tooth?

  straight, right angle, perpendicular
• Proximal line angles are sharp almost?

  90 angles
• in proximal line, however, the DILA is slightly more _ than the

  MILA?

  rounded
• The incisal 1/3 of the crown surface is relatively?

  flat
• The cervical two thirds of the surface is?

  convex
• CI, in labial surface it is?

  bilaterally symmetrical
• labial surface, The apex may , _____ but it will rarely if ever be curved to any great extent?

  slightly incline towards the distal
• The lingual fossa is _ in shape,

  will be __?

  trapezoidal, very shallow
• the lingual fossa is limited to the two-

  thirds of the crown?

  incisal and middle third
• In lingual surface, The cingulum will be smoothly rounded and ___ as the cinguli of the maxillary incisors?

  not as prominent
• In proximal surface, The width from labial to lingual

  is _ à provide stability in

  the bone for such a small tooth?

  broad
• in proximal surface, The root remains broad for __of its length, tapering

  only at the __?

  two thirds, apical third
• in proximal surface, Both mesial and distal surfaces have a __ extending most of the root length?

  deep depression
• in mesial surface, The cervical line curves _ more on the mesial surface than on the distal surface?

  incisally
• in mesial surface, The root converges apically, evenly toward a?


  relatively blunt (rounded) root end
• in mesial surface, A ____ is

  usually found for most of the length of

  the root?

  broad longitudinal root depression
• The cervical line curves _ on the

  distal than on the mesial surface?

  less
• The broad root depression may be _ on the distal surface of the root than on its mesial ?

  deeper
• in incisal surface, the _ diameter is more then the MeDi width?

  labial and lingual