Canine Teeth Anatomy PDF

Upper & Lower Canines Number of lobes (four lobes 3 labially and 1 lingually). Note: the middle lobe of the canine is well developed Incisally Labially Lingually cusp Labial ridge. Lingual ridge. For easy teeth description...

Upper & Lower Canines Number of lobes (four lobes 3 labially and 1 lingually). Note: the middle lobe of the canine is well developed Incisally Labially Lingually cusp Labial ridge. Lingual ridge. For easy teeth description We have to speak abou Geometric outline of the crown Outlines of the crown and root Convex Concave Surface anatomy of the crown and roo (anatomical landmark Upper canine has 5 aspects: Labial Lingual Mesial Distal Incisal Lower canine has 5 aspects: Distal Labial Lingual Mesial Incisal Geometric outline of the crown Facial and lingual aspects have trapezoid out line. Smallest uneven side cervically.  Facial and Lingual Outlines of 3 It’s Trapezoid and formed of Mesial outline:, convex till the contact area (at the junction of I 1/3 and M 1/3) then continues as concave till the cusp tip. Distal outline: concave till the contact area (at the middle third) then continues as convex till the cusp tip. Cervical outline: convex root wise.  Upper 3 & Lower 3 The crown is -short The crown is -longer -wide -narrower -thick -thinner *Mesially and distally the Mesially the crown is at crown bulge beyond the one line with root outline root outline *Distally the crown bulge The cusp tip is long and beyond the root outline pointed The cusp tip is shorter and flatter ( less pointed) (D slope >M slope) So their cusp tips is slightly mesial to the center of crown  Upper 3 & Lower 3 M D M D MCA----- at the junction of MCA---- in incisal1/3 near the incisal and middle 1/3s mesio-incisal an DCA----- in the center of DCA----- at the junction of middle 1/3 incisal and middle 1 So the contact areas are So the contact areas are located more cervically located more incisall  Labial aspect Elevations: It’s convex with maximum convixity at the cervical ridge. Labial ridge IT is a prominent ridge runs from the tip of the cusp toward the cervical margin The labial ridge is prominent in upper 3 The labial ridge is less prominent in lower 3  Upper 3 & Lower 3 The root is -long The root is the same but shorter -slender -conical The root apex is more pointed and The root apex is pointed and curved distally curved distally  Lingual aspect Elevations: 3 3 Marginal ridges, cingulum, Prominent lingual ridge that extend from the cusp tip till the cingulum in 3 while in 3 it’s restricted to the incisal third. Depressions: cingulum Lingual fossa that is divided into two fossae in 3 but still one in 3. Note: The elevations of the lower canine are not well developed as in case of the upper. The lingual surfaces in both are smaller in size than the labial surface due to the lingual convergence which accommodate ……….  Geometric outline of the crown Proximal aspects have triangular outline Apex of the triangle incisally. Note: the cusp tip of 3 centralized on the long axis or inclined labially. The base cervically. while the 3 cusp tip centralized or inclined Apex of the lingually. triangle incisally.  Mesial and distal Outlines of the crown Labial outline is convex with the crest of curvature at the cervical third represent…… Lingual outline is convex cervically represent... In the middle it’s straight due to presence of ridge …….. In the incisal third it’s convex again represent…… Cervical outline: curved incisally however, this curvature is less on the distal than the mesial. Notes: Lingual outline in the middle of 3 is concave rather than straight due to short lingual ridge. The root surface is broad with longitudinal depression. The depression is shallower mesially than distally of same tooth and is shallower in upper canine than lower canine. Note: the depression in lower canine may be so deep causing bifurcation in the root. The bifurcation may be apically or extend up to cervical third. If two roots exist they will be divided labially and lingually. lingual labial  Enumerate the names of the following elevations and depressions? Lingual ridge Cingulum. Distal marginal Mesial marginal ridge ridge. D.L.F M.L.F D.I.Ridge M.I.Ridge  Upper 3 & Lower 3 Geometric outline--- Diamond (Lab-Ling > M-D ) The cusp tip is located The cusp tip is located mesio-lingually mesio-labially  Incisal aspect. Outline and surface anatomy 3 The thickness is greater than the width. ( Diamond) 3 The elevations and depressions in the labial and lingual surfaces appeared in this aspect  Pulp cavity. Pulp cavity is formed of: Pulp chamber that present in the crown. Its outline follows the outline of the crown. In young teeth, it has pulp horn related to the cusp Root canal presents in the root and follows its outline. The number of root canals in canines is only one. Sometimes 3 has two root canals labially and lingually. The canals open in one apical foramen or separate foramina.