Lower Permanent Canine Anatomy PDF

Lower permanent canine Omyma meabed  CL 0.5mm more3 The mandibular canine crown is narrower mesiodistally than that of the maxillary canine and longer by 0.5 to 1 mm. The mandibular canine thickness is less than upper canine The root may...

Lower permanent canine Omyma meabed  CL 0.5mm more3 The mandibular canine crown is narrower mesiodistally than that of the maxillary canine and longer by 0.5 to 1 mm. The mandibular canine thickness is less than upper canine The root may be as long as that of the TH MMS Less 3 maxillary canine. The lingual surface of the crown is smoother, with less cingulum development A variation in the form of the mandibular canine is bifurcated roots. Labial Aspect From the labial aspect, the mesiodistal dimensions of the mandibular canine are less than those of the maxillary canine. The difference is usually about 1 mm. The essential differences between mandibular and maxillary canines viewed from the labial aspect may be described as follows: The crowns of the mandibular canines appear longer. but the effect of greater length is actually by the narrowness of the crown mesiodistally and the height of the contact areas above the cervix. The mesial outline of the crown of the mandibular canine is nearly straight, the mesial contact area being near the mesioincisal angle. Distal outline: convex the cusp angle is on a line with the center of the root. as on the maxillary canine, The mesial cusp ridge is shorter.  The distal contact area of the mandibular canine is more toward the incisal aspect than that of the maxillary canine but is not up to the level of the mesial area. The cervical line labially has a semicircular curvature apically. The mandibular canine root is shorter by l or 2 mm on average than that of the maxillary canine, and its apical end is more sharply pointed and curved distally.  Lingual Aspect In comparing the lingual aspect of the mandibular canine with that of the maxillary canine, the following differences are noted. The lingual surface of the crown of the mandibular canine is flatter, simulating the lingual surfaces of mandibular incisors. The cingulum is smooth and poorly developed. The marginal ridges are less distinct. ❖Elevations Lingual ridge constricted to incisal one third cingulum M,D marginal ridges Incisal ridges ❖Depressions Lingual fossa Mesial Aspect characteristic differences are: Labial aspect: less curvature with very little curvature directly above the cervical line. The lingual outline of the crown is curved in the incisal one third then concave to a slight degree then convex toword cingulum  The cingulum is not as pronounced the cusp to appear more pointed The tip of the cusp is more nearly centered over the root, with a lingual placement. The cervical line curves more toward the incisal portion than does the cervical line on the maxillary canine. The roots of the two teeth are quite similar from the mesial aspect with the possible exception of a more pointed root tip on the mandibular canine. The developmental depression mesially on the root of the mandibular canine is more pronounced root may divided into 2 roots or bifid root. Distal Aspect Contact area: more cervical than mesial Cervical line shallower than mesial  Incisal Aspect Geometric out line: Oblong diamond The main differences from upper canine are as follow: The mesiodistal dimension of the mandibular canine is less than the labiolingual dimension. The cusp tip and cusp ridges are more likely to be inclined in a lingual direction in the mandibular  Elevations: incisal ridges marginal ridges cingulum labial ridge short lingual ridge constricted on incisal 1/3 depressions single lingual fossa  Pulp cavities ❑ Mesiodistal section: Mesiodistal dimension is narrower than labiolingual dimension ❑ Labiolingual section: similar to upper canine but it characterized by dentinal island may be found Two separate root canals in single root may be found Cervical cross section: ovoid Mention the colored structute