Permanent Upper Canine PDF

‫بسم هللا الرحمن الرحيم‬  - There are two maxillary and two mandibular canines. - They are called corner stone of the mouth. - It has long root for good anchorage in the bone. - The middle labial lobe is well developed forming cusp, labial and lingual ridges. - The bone ridge over the labial...

‫بسم هللا الرحمن الرحيم‬  - There are two maxillary and two mandibular canines. - They are called corner stone of the mouth. - It has long root for good anchorage in the bone. - The middle labial lobe is well developed forming cusp, labial and lingual ridges. - The bone ridge over the labial surface of the root is called canine eminence (insure facial expression). - They are the longest teeth.  Maxillary permanent canine Chronology Appearance of the dental organ 6 m.i.u First evidence of calcification 4-5 months. Enamel completed 6-7 years Eruption 11-12 years Root completed 14-15 years Type and function This tooth has the function of incising, holding and tearing food as well as esthetic. No. of lobes It has four lobes (three labial-the middle is well developed- and cingulum) Relation The upper canine make contact mesially with the distal surface of the lateral incisors and distally with the mesial surface of the 1st premolar. 4 3 2 2 3 4  No. of surfaces It has four surfaces and incisal aspect. Labial Lingual Mesial Distal No. of roots It has one root. Incisal  Surface Anatomy - The mesial half of the crown resembles the upper lateral incisor where the distal half resembles a premolar. Labial aspect ☻Geometrical outline of the crown: Trapezoid. -The short side cervically. -The long side incisally. ☻The outline: - Mesial outline starting from cervical line convex till the junction of and incisal thirds ( contact area). Then become concave till cusp tip. - The distal outline is concave till the middle third (the contact area) then convex to the cusp tip. - The cervical line is convex root-wards.  - The distal slope is longer than the mesial slope. ☻Surface anatomy: -The surface is convex both mesiodistally and inciso-cervically. Elevations: - Cervical ridge. - Labial ridge. - Cusp. Depressions: - Two developmental grooves. ☻The root: It is long, slender, conical in shape - with the apical 3rd tapered and distally curved. -Smooth convex surface.  Lingual aspect - It has the same geometrical outline and outline as the labial surface. - The mesial and distal sides of the crown and root converge lingually. ☻Surface anatomy: The elevations: - The cingulum. - The marginal ridges (mesial and distal). - The lingual ridge. - Mesio and disto-incisal ridges. The depressions - Two lingual fossae.  Mesial aspect ☻Geometrical outline of the crown: ☻Triangular in shape; the base cervically and the apex incisally. ☻The cusp tip may be on a line that bisects the centre of the root or slightly labial to it. ☻The outline: ☻The labial outline is convex with the greatest convexity at cervical 1/3 ( cervical ridge). ☻The lingual outline is convex at cervical 1/3 (cingulum). - Then straight at the middle 3rd and convex at incisal 3rd.  ☻The mesial cervical line is convex incisally. ☻Surface anatomy: ☻The mesial surface is convex with the maximum convexity at the junction of the incisal and middle 1/3s ( the contact area). ☻The root: - The root is broad and taper to blunt apex. - It has a mesial developmental depression.  The distal aspect ☻Similar to the mesial aspect but differ in. - The cervical line curvature is less than mesial ( by 1 mm). -The contact area is broader and located at the middle 1/3 (more cervially). - The developmental depression of the root is more developed.  Incisal aspect Labial - The labio-lingual diameter is greater than the mesio-distal diameter. - The cusp tip is slightly labial and mesial to the center of the M D crown. - The distal slope is longer than the mesial slope. Lingual - All elevations and depressions can be seen from this aspect.  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 Enumerate the names of the following elevations and depressions? Cervical ridge. Cusp tip. Labial ridge. M. slope. D. slope. Lingual ridge. M.M.R D.M.R Lingual fossae. Cingulum.  ☻Pulp cavity ►Mesio-distal section - Has narrow pulp chamber. - The root canal is long and tapering down to the apical foramen. ►Labio-lingual section - The pulp chamber is pointed incisally. - The root canal start cervically wide till about the middle then narrows to the apical foramen.