mandibular incisors Flashcards
what is the point of contact called where two adjacent teeth contact one another?
interproximal contact
what are the spaces that widen out from the contact called?
embrasures
how many embrasures do anterior and posterior teeth have?
- anterior = 4
- incisal, gingival, facial, lingual
NOTE - incisal < gingival and facial = lingual
- incisal, gingival, facial, lingual
- posterior = 4
- occlusal, gingival, facial, lingual
NOTE - occlusal = gingival and facial < lingual
- occlusal, gingival, facial, lingual
what are mandibular incisors used to do?
incise or cut food
what is the smallest tooth in the oral cavity?
mandibular central incisor
what teeth have the smallest mesiodistal diameters of any tooth in the mouth?
mandibular incisors
GENERAL CHARACTERISTICS OF MANDIBULAR INCISORS
broader buccolingually (BL) than mesiodistally (MD)
the crown of a mandibular central incisor is approximately ____ as long (IG) as wide (MD)
2x
mesioincisal and distoincisal line angles of mandibular central incisors are _____
sharp 90 degree angles (both)
what tooth is often described as the only symmetrical tooth in the mouth?
mandibular central incisor
where are the contacts located for a mandibular central incisor?
both mesial and distal contacts are at the same level in the incisal 1/3
how many roots does a mandibular central incisor have?
one root (root is longer than the crown legnth)
the mesial and distal marginal ridges are only ______ on mandibular central incisors
minor elevations
where is the height of contour located on a mandibular central incisor?
cervical 1/3
where does the incisal edge lay when bisecting the root of a mandibular central incisor?
lies lingual to line bisecting root
when worn, the incisal edge angles to the ____ for a mandibular central incisor
facial
the CEJ curves incisally about 1mm more than one the _______ for a mandibular central incisor
distal
the developmental depression for a mandibular central incisor is greater on the ________ than on the ________
- distal of root
- mesial
the root of a mandibular central incisor is borader _______ than _______
- faciolingually
- mesiodistally
what is the relationship regarding size for mandibular central incisor and lateral incisors?
lateral incisors are larger than centrals (wider MD)
all extra width appears to be added to the ______ aspect of a mandibular lateral incisor
distal
in a mandibular lateral incisor, the distal crown height is often _______ than the mesial crown height
shorter
the incisal edge of a mandibular lateral incisor slopes _____ distally
downward
the mesioincisal angle for a mandibular lateral incisor is _____
sharp 90 degree angle
the distoincisal angle for a mandibular lateral incisor is more ______ than the mesioincisal
rounded
where are the mesial and distal contacts for a mandibular lateral incisor?
in the incisal 1/3
NOTE - distal contact is more cervical than mesial
the developmental depressions on the root of the mandibular lateral incisor are __________ than on the mandibular central incisor
more pronounced
the ______ aspect of a mandibular lateral incisor is twisted lingually (the lingual surface is not visible when viewed from the distal)
distal
the incisal edge of a mandibular lateral incisor is ______ to the center of the tooth
lateral
the distal part of the crown of a mandibular lateral incisor appears to be curved _______
lingually
