Permanent Canines PDF

THE PERMANENT CANINES IBTEHAL BISHTAWI There are four canines; two in each arch and one in each quadrant IBTEHAL BISHTAWI The four canines are placed at the “corners” of the mouth; each one is the third tooth from the median line, right and left, in the maxi...

THE PERMANENT CANINES IBTEHAL BISHTAWI There are four canines; two in each arch and one in each quadrant IBTEHAL BISHTAWI The four canines are placed at the “corners” of the mouth; each one is the third tooth from the median line, right and left, in the maxilla and mandible. IBTEHAL BISHTAWI They are commonly referred to as the cornerstones of the dental arches. IBTEHAL BISHTAWI They are the longest teeth in the mouth; the crowns are usually as long as those of the maxillary central incisors, and the single roots are longer than those of any of the other teeth. IBTEHAL BISHTAWI They develop from four lobes: Three labial and one lingual (for cingulum): the middle labial lobe is highly developed incisally to form a strong, well-formed cusp. IBTEHAL BISHTAWI The shapes and positions of the canines contribute to the guidance of the teeth into the intercuspal position by “canine guidance. IBTEHAL BISHTAWI The bone ridge ( prominence) over the labial portions of the roots of the canines , called the canine eminence IBTEHAL BISHTAWI The maxillary permanent canines have other synonyms like: Cuspids Dog teeth Eye teeth Corner teeth Beauty teeth Corner stone of dental arches. IBTEHAL BISHTAWI FUNCTIONS OF CANINES : Canines are mainly used for tearing food assist the permanent incisors and premolars in mastication Anterior teeth with transitional features of posterior teeth 0 IBTEHAL BISHTAWI In many ways, it acts like a transition between anterior and posterior segments of the dental arch. Exhibit some of the characteristics of permanent maxillary incisors and some features of premolars. 0 IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Calcification & Eruption Schedule 3 3 Calcification begins 4-5 Months Crown completed 6-7years 6 11 Eruption 11-12years Root completed 13-15 years 13 23 IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES LABIAL ASPECT It is trapezoid or pentagonal with shortest side cervically IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES LABIAL ASPECT The mesio-distal measurement of the crown is about 1 mm Lesser than that of the maxillary central incisor. MX canine is narrower. NB. The maxillary central incisor is the widest mesiodistally of any of the anterior 7.5 teeth 8.5 IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES LABIAL ASPECT The cervical line labially is convex, with the convexity toward the root portion IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES LABIAL ASPECT Mesially, the outline of the crown may be convex from the cervix area to where it joins the mesial cusp slope ( area of mesial contact area ) IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Maximum convexity of the mesial outline (mesial contact area) is at the junction of incisal and middle third of the crown. D IBTEHAL BISHTAWI M PERMANENT MAXILLARY CANINES LABIAL ASPECT Distal outline is convex for most of its part except near cervix, where it is concave IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Distally, the outline of the crown is usually concave between the cervical line and the distal contact area. IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Maximum convexity of the distal outline (distal contact area) is at the center of middle third of the crown. The two levels of contact areas mesially and distally should be noted ( not on the same level ) D IBTEHAL BISHTAWI M PERMANENT MAXILLARY CANINES LABIAL ASPECT The cusp tip is on a line with the center of the root. IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Incisal outline is formed by two slopes extending downwards from mesial and distal contact areas to meet the cusp tip at midline. These slopes are called as mesial and distal cusp ridges IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT The cusp has a mesial slope and a distal slope, the mesial slope being the shorter of the two. IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT There are shallow depressions mesially and distally dividing the three labial lobes. The middle labial lobe shows much greater development than the other lobes. This produces a ridge on the labial surface of the crown. ( LABIAL RIDGE ) IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT A line drawn over the crest of this ridge, from the cervical line to the tip of the cusp, is a curved one inclined mesially at its center. Shallow developmental All areas mesial to the crest of this depressions ridge exhibit convexity Labial ridge IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Distally to the labial ridge (see incisal aspect), a tendency exists toward concavity at the cervical third of the crown, although convexity is noted elsewhere in all areas approaching the labial ( Incisal Aspect) ridge IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES LABIAL ASPECT Apical third of root usually have Distal curvature ( can be mesial ) IBTEHAL BISHTAWI D M PERMANENT MAXILLARY CANINES Palatal ASPECT The cervical line from the lingual aspect differs somewhat from the curvature found labially and shows a more even curvature. IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Palatal ASPECT The Cingulum is large (is largest of all Anteriors ) and, in some instances is pointed, like a small cusp M D IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Palatal ASPECT A well-developed lingual ridge is seen that is confluent with the cusp tip; this extends to a point near the cingulum. M D IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Palatal ASPECT The marginal ridges are strongly developed and along with cingulum they form the boundaries of lingual fossa. M D IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Palatal ASPECT Shallow concavities are evident between lingual ridge and the marginal ridges Called mesial and distal lingual fossae M D IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Palatal ASPECT The lingual portion of the root of the Labial wall maxillary canine is narrower than the of root labial portion. Palatal wall of root because of lingually convergence M D IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT The mesial aspect of the maxillary canine generally shows greater bulk and a greater labio-palatal measurement than any of the other anterior teeth 8 F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT Maxillary permanent canine has the greatest labiolingual width amongst anteriors. Thus, the tooth appears more bulkier from proximal aspects. 8 F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT The outline of the crown is wedge shaped , triangular. F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT The Crest of the curvature is at the cervical third (but more incisally than that of the maxillary central incisor) because the middle labial and the lingual lobes are more highly developed F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT Mesial contact area: The mesial contact area is at the junction of incisal and middle third of the crown cervicoincisally, and is at the center labiolingually F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT Canines show a flattened area labially at the cervical third of the crown Below the cervical third , the labial face is convex from the crest of curvature to the tip of the cusp. F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT The lingual outline of the crown from the mesial aspect may be represented by a convex line describing the cingulum, which convexity straightens out (concave) as the middle third is reached, becoming convex again in the incisal third F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT The cervical line curves toward the cusp on average by approximately 2.5 mm at the cementoenamel junction. F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT Root is broad labio-palatally with developmental depression (helps anchor in bone preventing rotation & displacement) F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES Mesial ASPECT NB: Unlike the incisal ridge of maxillary incisors, the cusp tip of maxillary canine is not centered over the root. It is placed labial to the vertical root axis F P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES DISTAL ASPECT The distal aspect as the mesial aspect, EXCEPT Cervical line exhibits less curvature toward the cusp ridge The distal marginal ridge is heavier and more irregular in outline The developmental depression on the distal side of the root is more pronounced P F IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES INCISAL ASPECT F It is diamond shaped D M P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES INCISAL ASPECT F In general, the labiolingual dimension is greater than the mesiodistal. D M P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES INCISAL ASPECT F The crown is asymmetrical with distal half of the crown larger than the mesial half. D M P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES INCISAL ASPECT F The distal portion of the crown appears to be stretched to make D M contact with the 1st premolar P IBTEHAL BISHTAWI  PERMANENT MAXILLARY CANINES INCISAL ASPECT F Position of the cusp tip is located labial to the D M center of the crown labiolingually, and mesial to the center mesiodistally P IBTEHAL BISHTAWI  PERMANENT MAXILLARY CANINES INCISAL ASPECT F Mesial side shows a crown portion with greater labiopalatal bulk D M P IBTEHAL BISHTAWI  PERMANENT MAXILLARY CANINES INCISAL ASPECT F The ridge of the middle labial lobe is very noticeable labially from the incisal aspect D M P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES INCISAL ASPECT F The cingulum development makes up the cervical third of the crown lingually D M P IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES IBTEHAL BISHTAWI PERMANENT MAXILLARY CANINES IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES Calcification & Eruption Schedule 3 Calcification begins 3-4 Months Crown completed 6-7years Eruption 9-10 years 27 22 Root completed 12-14 years Because maxillary and mandibular canines bear a 43 33 close resemblance to each other, direct comparisons are made with the maxillary canine in describing the mandibular canine. IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES LABIAL ASPECT It is trapezoid or pentagonal with shortest side cervically IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT 11 The crowns of the mandibular canines is longer. 11 10 IBTEHAL BISHTAWI MN canine PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT The mesial outline of the crown of the mandibular canine is almost straight 11 with the mesial outline of the root D IBTEHAL BISHTAWI MN canine M PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT The maximum convexity of the mesial outline (The mesial contact area) is near 11 the mesioincisal angle. D IBTEHAL BISHTAWI MN canine M  PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT The distal contact area of the mandibular canine is more toward the incisal aspect 11 than that of the maxillary canine but is not up to the level of the mesial area. D IBTEHAL BISHTAWI MN canine M PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT The cervical line labially has a semicircular curvature apically. 11 D IBTEHAL BISHTAWI MN canine M PERMANENT MANDIBULAR CANINES MX canine LABIAL ASPECT The crown appears to be tilted distally because of its straight mesial 11 outline and curved distal outline The maxillary canine crowns are more likely to be in line with the root. D IBTEHAL BISHTAWI MN canine M PERMANENT MANDIBULAR CANINES MN canine MX canine 17 LABIAL ASPECT The mandibular canine root is shorter by l or 2 mm on average than that of the 11 maxillary canine, and its apical end is more sharply pointed. The maxillary canine, the longest tooth of any 15 of the other teeth. (overall tooth length) 16 17 D IBTEHAL BISHTAWI M PERMANENT MANDIBULAR CANINES MN canine MX canine LABIAL ASPECT The cusp Tip is on a line with the center of the root, as on the maxillary 11 canine. D IBTEHAL BISHTAWI M PERMANENT MANDIBULAR CANINES LABIAL ASPECT MX canine The Similar to that maxillary except Crown of mandibular canine appears longer, not only because of its extra 11 length, but also due to its narrow mesiodistal width and more incisally placed contact areas Mesioincisal and distoincisal angles are well-defined The labial ridge is less prominent than that of the maxillary canine IBTEHAL BISHTAWID MN canine M  PERMANENT MANDIBULAR CANINES PALATAL ASPECT MX canine Similar to that maxillary except The lingual surface is less concave and more flattened The lingual fossa is shallow. When lingual ridge is present, there are two small fossae, mesial and distal lingual fossae. The lingual ridge is also less well-developed than that of the maxillary canine The cingulum is poorly developed. The marginal ridges are less prominent. M IBTEHAL BISHTAWI MN canine D PERMANENT MANDIBULAR CANINES MESIAL ASPECT MX canine From the mesial aspect, the mandibular canine has less curvature labially on the crown, with very little curvature directly above the cervical line F IBTEHAL BISHTAWI MN canine P PERMANENT MANDIBULAR CANINES MESIAL ASPECT MX canine The lingual outline of the crown is curved in the same manner as that of the maxillary canine, but it less in degree F IBTEHAL BISHTAWI MN canine P  PERMANENT MANDIBULAR CANINES MESIAL ASPECT MX canine Incisal portion of the crown is thinner labiolingually, which allows the cusp to appear more pointed and the cusp ridge to appear more slender. F IBTEHAL BISHTAWI MN canine P PERMANENT MANDIBULAR CANINES MN canine MX canine MESIAL ASPECT The cusp tip is in the center or lingual to the vertical root axis, while that cusp tip of maxillary canine is labial to the vertical root axis. F IBTEHAL BISHTAWI P PERMANENT MANDIBULAR CANINES MN canine MX canine MESIAL ASPECT The developmental depression mesially on the root of the mandibular canine is more pronounced and some- times quite deep. F IBTEHAL BISHTAWI P PERMANENT MANDIBULAR CANINES MN canine MX canine MESIAL ASPECT 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. F IBTEHAL BISHTAWI P PERMANENT MANDIBULAR CANINES MN canine MX canine MESIAL ASPECT The cervical line curves more toward the incisal portion than does the cervical line on the maxillary canine. F IBTEHAL BISHTAWI P PERMANENT MANDIBULAR CANINES DISTAL MESIAL DISTAL ASPECT It is similar to mesial aspect of mandibular canine except that: Cervical line is less curved on distal surface P IBTEHAL BISHTAWI F  PERMANENT MANDIBULAR CANINES MN canine MX canine INCISAL ASPECT The outlines of the crowns of mandibular and maxillary canines from the incisal aspect are diamond shaped P IBTEHAL BISHTAWI F  PERMANENT MANDIBULAR CANINES MN canine MX canine INCISAL ASPECT The mesiodistal dimension of the mandibular canine is less than the labiolingual dimension. P IBTEHAL BISHTAWI F PERMANENT MANDIBULAR CANINES IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES IBTEHAL BISHTAWI PERMANENT MANDIBULAR CANINES IBTEHAL BISHTAWI