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65 Cards in this Set
- Front
- Back
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What are the functions of the max. incisors?
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cut, shear, and tear food
articulate speech support lips esthetically guid mandible in movement |
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What is the difference between the incisal ridge and the incisal edge?
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The incisal ridge merges with the mesioincisal and distoincisal angles and with the labial and lingual surfaces.
The incisal edge is formed by the wearing down of the ridge and forms and angle with the lingual surface. |
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Which dimension is greater on max. incisors?
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incisocervical
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What is the shape of the facial crown outline form of central incisors?
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square or trapezoidal
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Describe the incisal edge form of the max. central incisor.
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almost straight across, but curves incisally at the center giving the greatest incisocervical length at the center.
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compare the sizes of the mamelons of the max. central incisor.
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distal and mesial are equal, central is smaller
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Describe the mesioincisal corner of the max. central incisor.
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relatively sharp, almost a right angle
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Describe the mesial proximal contact of the max. central incisor.
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incisal 1/3 of crown near mesioincisal angle.
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Describe the cervical line form of the max. central incisor.
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symmetrical
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What are imbrication lines?
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faint curved lines, sometimes present in the cervical 1/3rd of the crown, follows the curvature of the cervical line
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Compare the distal outline form and the mesial outline form of the max. central incisor.
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the distal is more convex (curved) than mesial
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Where is the distal proximal contact of the max. central incisor?
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near the border of the incisal 1/3 and the middle 1/3
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describe the Distoincisal angle of the max. central incisor.
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rounded, obtuse angle
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What is the root:crown ratio of max. central incisor?
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1.5:1 to 2:1
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What is the shape of the max. central incisor cross-sectional root form?
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rounded triangle
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Compare the mesial and distal marginal ridges of the max. central incisor.
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mesial longer than distal marginal ridge
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Compare facial and lingual cervical line forms of max. central incisor.
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lingual has smaller arch (curvature) than facial cervical line
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Describe the positioning of the cingulum of the max. central incisor.
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usually off-centered to the distal
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What's the shape of the mesial crown outline form of the max. central incisor?
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triangular
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Describe the incisal edge location looking at the max. incisors mesially.
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In line with or just facial to the root bisector line.
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What is unique about the mesial cervical line of the max. central incisor?
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cervical curvature on the mesial is greater than on any other surface of any other tooth in the mouth
2.8-3.5mm |
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Where are the height of contours located on the mesial outline of the max. central incisor?
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cervical 1/3, both facial and lingual
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What is the shape of the incisal crown outline form of the max. central incisor?
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roughly triangular
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What is the faciolingual dimension of the max cent. incisal edge?
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1.5 - 2 mm
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What are some possible variations in the max. lateral incisor?
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peg laterals
palatogingival groove linguogingival groove |
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What is a characteristic feature of the max. lateral incisor?
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roundness
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Is the incisal edge of the max. lat. incisor flat or curved?
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curved
crest of curvature slightly mesial to the center of the crown |
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Is the mesioincisal corner of the max. lat. incisor obtuse, acute or nearly 90 degrees?
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acute
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Where is the mesial proximal contact of the max. lat. incisor located?
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at the junction of the incisal and middle 1/3rds
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Looking at the tooth facially, compare the mesial and distal outlines.
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the distal is more convex and more rounded than the mesial
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Where is the distal proximal contact of the max. lat. incisor located?
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located 1/2 the distance from the incisal edge to the cervical line (center of middle third)
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Is the distoincisal corner of the max. lat. incisor obtuse, acute or nearly 90 degrees?
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obtuse
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Is the max. lat. incisor larger larger faciolingually or mesiodistally?
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faciolingually
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Describe the position of the cervical line form of the max. lat. incisor.
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offset distally
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Compare the marginal ridges of the max. lat. incisor.
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Mesial marginal ridge - longer and straighter than the distal marginal ridge
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Which is deeper, the lingual fossa of the max. cent. or max. lat?
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max. lat.
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What shape is the mesial crown outline form of the max. lat?
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triangular
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Where is the facial height of contour located on the max. lat?
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cervical 1/3
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Where is the lingual height of contour located on the max. lat?
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cervical 1/3 on the cingulum
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Which is greater, the facioiolingual or the mesiodistal dimension of the max lat?
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mesiodistal, barely
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What is the shape of the lingual crown outline form of the max. lat?
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triangular
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Describe the mesiodistal location of the cingulum on the max. lat.
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nearly centered
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Describe the facioproximal line angles of the max. lat.
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markedly rounded
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Describe the Linguogingival groove
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originates from the lingual pit
extends onto the cingulum slightly to the distal |
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Compare size of mand. central and mand. lat.
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lat bigger
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In which direction are the labial surfaces of the mand incisors inclined?
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lingually
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What is the mesiodistal crown dimension of the central mand. incisors?
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5 - 6 mm
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Are central mand. incisors symmetrical?
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yes
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Is the incisal edge of the central mand. incisors flat or rounded?
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flat
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Describe the proximal incisal angles of the central mand. incisors.
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both mesial and distal angles are sharp and 90 degrees
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Describe the proximal surfaces of the central mand. incisors when looked at facially.
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both are very straight and taper towards the root evenly
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Describe the facial developmental depressions on the mand. cent. incisor.
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if present at all, very faint and near incisal edge
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Describe the location of the proximal contacts of the mand. cent. incisor.
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almost level with incisal edge
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What anatomical feature is there on the lingual surface of the mand. cent incisor?
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lingual surface has a slight concavity in the incisal 1/3
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Describe the location of the incisal edge form of the mand. cent. incisor.
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lingual to the center of the root
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What's different about the incisal edge slope of the mand. cent. incisor?
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Inclines facially due to wear
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Describe the height of contours of the mand. incisors.
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Cervical 1/3, just incisal to cervical line
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What is distinct about the mand. central incisors' roots?
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sides parallel then taper abruptly in apical 1/3
developmental depressions usually present |
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What is the longer dimension on the incisal view of the mand. central incisor?
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faciolingual
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Are lat. mand. incisors symmetrical?
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no
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Describe the incisal edge form of the lat mand. incisor from facial.
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slopes cervically on distal side
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compare mesio and distoincisal corners of mand lat.
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Distoincisal is rounder than mesioincisal corner
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Facial developmental depressions
found on what % of lateral incisors? |
51
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position of mand lat cingulum?
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offset to distal
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What is different between the incisal edges of the mand. incisors?
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the central is perpendicular to bisector
the lateral is offset to the curve of the mand. arch |
