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Dentistry-Incisor Mind Map
This is a mind map about dentistry - incisors, including mandibular central incisors, mandibular lateral incisors, maxillary lateral incisors, maxillary central incisors, etc.
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Dentistry-Incisor Mind Map
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Incisor
maxillary central incisors
The incisors are the largest in size and have the widest mesio-distal diameter. The tooth with the longest crown in the whole mouth
dental crown
Lip surface
Smooth, flat, approximately trapezoidal
Mesial edge long and straight Distal margin short and protruding Curved neck edge Straight incisal edge
The mesial incisal angle is nearly right, and the distal incisal angle is slightly rounded and blunt; 2 developmental grooves; high point of appearance: labial cervical ridge
tongue surface
Shaped like lip surface, narrower
Incisal crest: straight Mesial marginal ridge: long and straight Distal marginal ridge: short, rounded process Tongue protuberance: large and prominent
Tongue fossa: wide and deep High point of appearance: lingual protuberance
Adjacent
triangle The mesial surface is large and flat, the distal surface is small and protruding The mesial curvature is larger and the distal neck curvature is smaller. Mesial contact area: cut 1/3 of the mesial angle; distal contact area: cut 1/3 of the distal angle
incisal end
The labial side is flatter and curved - the incisal edge Lingual round process - incisal ridge Proximal view: the incisal ridge is located on the labial side of the long axis of the tooth
tooth root
Single root, thick and straight The labial side is wider than the lingual side Root and crown are close to 1:1 Transverse section of root neck 1/3: round triangle
maxillary lateral incisors
Among the incisors, the labial surface is the most protruding and the lingual fossa is the deepest (labial convex and lingual concave). The distal incisal angle is the roundest and bluntest (the difference in incisal angle is the largest) The incisors have the most variations: tapered teeth, congenitally missing teeth, and invaginated teeth (deformed lingual fossa, deformed root groove, deformed lingual apex, and mesodontia).
dental crown
Lip surface
Narrow, short, rounded The mesial incisal angle is acute and the distal incisal angle is arc-shaped. Neck margin significantly narrowed The developmental groove is not obvious
tongue surface
Approximate triangle The marginal ridge is more obvious than the maxillary central incisor The tongue protuberance is more prominent The tongue fossa is narrow and deep, with a "V" shape
Adjacent
long and narrow triangle The mesial surface is wider and straight, contact area: cut 1/3 of the mesial angle Small round protrusion on the distal surface, contact area: cut 1/3 of the distal angle The mesial neck curvature is greater than the distal neck curvature
incisal end
The distal lingual inclination is greater than that of the maxillary central incisors
tooth root
Root length>Crown length Root tips are remote and remote Transverse section of root neck 1/3: oval
mandibular lateral incisors
dental crown
Lip surface
The mesial incisal angle is sharp and the distal incisal angle is blunt (distinguish between left and right) The developmental groove is more obvious than that of the mandibular central incisor
tongue surface
The tongue protuberance is narrow The incisal ridge, marginal ridge, and lingual fossa are not obvious
Adjacent
long and narrow triangle, The mesial surface is large and flat, contact area: cut 1/3 of the mesial angle The distal surface is small and protruding, contact area: cut 1/3 of the distal angle
incisal end
The incisal ridge slopes from mesial to distal and lingually Proximal view: the incisal ridge is located on the long axis of the tooth or slightly lingual
tooth root
Oblate single root, slightly longer than the mandibular central incisor The longitudinal depressions on the mesial and distal root surfaces are obvious. Root apex deviates distally Transverse section of root neck 1/3: oblate
mandibular central incisor
Smallest in the whole mouth The crown of the tooth is symmetrical from left to right, and it is difficult to tell the left and right sides after separation.
dental crown
Lip surface
Long and narrow trapezoid, smooth and flat Nuchal diameter > mesial and distal diameter (obvious) The incisal edge is straight and the neck edge is slightly curved. The mesial and distal edges are symmetrical, and the mesial and distal incisal angles are equal (difficult to distinguish left and right) High point of appearance: Labial cervical ridge Labial cervical ridge and developmental groove are not obvious
tongue surface
The tongue fossa is shallow and not obvious The incisal ridge and mesial and distal marginal ridges are not obvious Tongue process is smaller Outward high point: lingual protuberance
Adjacent
long and narrow triangle The curvature of the tooth neck is small, and the mesial is larger than the distal. Mesio-distal contact area: cut 1/3 of the mesial angle
incisal end
Straight, thin, symmetrical Proximal view: the incisal ridge is located on the long axis of the tooth or slightly lingual
tooth root
Flat round single root Labial and lingual diameter > mesio-distal diameter, labial side > lingual side There is a long and narrow depression on the adjacent surface, distal > mesial (distinguish left and right) The root tip is slightly remote Cross section of the middle 1/3 of the root: gourd-shaped