Ch 6 Permanent Max CI

Question 1

Labial:

• crown height
• mesial-distal
• mesial outline
• distal outline
• incisal
• cervical
• root

Answer 1

• 10mm to 11mm long
• 8 to 9 mm wide (@root its -1.5 to 2mm less)
• slightly convex
• more convex
• curves down toward crown center
• semicircular direction w/ curvature rootwise
• cone-shaped, 2or 3mm longer than crown

Question 2

Lingual

Answer 2

• has convexities and a concavity-shallow
• below cervical line is smooth convexity-cingulum (moderately pronounced)
• moderate confluent marginal ridges
• moderately deep fossa
• crown and root taper lingually
• linguoincisal edge is raised
• lingual portion of root is narrower than labial

Question 3

Mesial:

• crown
• incisal ridge
• Labial
• Lingual
• cervical line
• root

Answer 3

• web-shaped or triangular:
  
  • base-cervix, apex-incisal ridge
  • has greatest labiolingual measurement (0.5mm)
• is on line w/ center of root
• slightly convex
• convex to cingulum, then concave(@mesial marginal) then slightly convex again @ linguo-incisal ridge & incisal ridge
• curves incisally to a noticeable degree, 3-4mm
• cone-shaped, bluntly rounded

Question 4

Distal

Answer 4

• illusion of greater thickness becozof slope on labial aspect
• little difference bet distal/mesial outlines
• cervical line curvature is less extent

Question 5

Incisal-triangular

• Labial
• cervical portion
• incisal ridge
• lingual
• mesio-distal
• cervical
• crown

Answer 5

• broad and flat
• convex
• clear with differentiation from incisal edge
• tapers toward cingulum
• calibration of crown @ labial line angles greater than the same calibrat the lingual line angles
• mesiolabial and distolabial line angles are prominent from incisal aspect
• cingulum of crown makes up cervical portion of lingual surface
• shows more bulk, labioling more than 2/3s as great as mesiodist calib

Question 6

General Info

Answer 6

• widest mesiodistally > ant teeth
• punch and cut food during mastication
• only teeth with mesial to mesial contact
• mesial outline: slight convex, squared/rect appearance
• distal outline: more convex, crest of curvature higher towards cervical
• 3 pulphorns, 4 lobes
• straight incisal edge, even curvature of cervical line to root, mesial incisal angle sharp, distal incisal round
• incisal outline: regular/straight after wear tends to curve downwards towards center of crown outline
• cervical outline: semi-circular direction, curvature toward root.
• 2 forms:
  
  • wide at cervix-labially
  • narrow at cervix
• crown sizes are gender dimorphic, but bet enamel thickness and crown width of dentin low.