Tooth Variations. Suruedee Chinthakanan
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1 Tooth Variations Suruedee Chinthakanan
2 Tooth variations Dental anomalies Cause : hereditary factor Developmental disturbances of teeth
3 Tooth variations Enamel is formed from the ectodermal components. Dentin, pulp, cementum, the supporting PDL, and bone are all derived from ectomesenchyme
4 Developmental disturbances of teeth Disturbances in Size Disturbances in Shape Disturbances in Structure Disturbances in Number Disturbances in Eruption R.Rajendran, B.Sivapathasundharam,2007
5 Developmental alterations in size of teeth Race, systemic disease, syndromes,etc. Microdontia Hypodontia maxillary lateral incisors, permanent third molars peg-shaped Macrodontia mandibular third molar
6 Developmental alterations in shape of teeth Alterations in crown shape Alterations in root shape
7 Alterations in crown shape shovel-shaped incisors permanent Maxillary lateral incisors permanent Maxillary central incisors Mamelons newly erupted teeth B.S.Kraus, R.E.Jordan, L.Abrums,1969
8 Alterations in crown shape Dens invaginatus (dens in dente) lingual pit Radiographic feature permanent maxillary lateral incisors ; bilateral involvement Dental caries grabpage.info J.A.Regezi, J.J.Sciubba, R.C.K.Jordan,2008
9 Alterations in crown shape Palatogingival groove permanent incisors Dental caries & periodontal disease pocketdentistry.com
10 Alterations in crown shape Accessory lingual ridges permanent maxillary incisors : esp. central incisor Vary in number & size Talon cusps lingual surface three-pronged pattern as eagle s talon Composes of : enamel, dentin and pulp permanent maxillary incisors
11 Alterations in crown shape Accessory cusps permanent premolars and molars
12 Alterations in crown shape Dens evaginatus tubercle or cusp : central groove, lingual ridge of buccal cusp permanent premolars, molars premolars > molars, mandible > maxilla Composes of : enamel, dentin and pulp Exposes pulp blog.xuite.net
13 Alterations in crown shape Variation of cusp of carabelli Vary in size ; may be absent Vary in location
14 Alterations in crown shape cervical enamel extension (cervical enamel projection) mandibular molars > maxillary molars Periodontal disease
15 Alterations in crown shape Taurodontism Large pulp chamber, apically bifurcation Oral Maxillofacial pathology,2004.
16 Alterations in crown shape Hutchinson s incisor / mulberry molar congenital syphilis
17 medical-dictionary.thefreedictionary.com Alterations in root shape
18 Alterations in root shape Dilaceration permanent maxillary incisors Root canal treatment, extraction J.A.Regezi, J.J.Sciubba, R.C.K.Jordan,2008
19 Alterations in root shape Accessory roots (supernumerary roots) third molars, mandibular canines, premolars Root canal treatment, extraction medind.nic.in quizlet.com
20 Alterations in root shape Enamel pearls maxillary molars > mandibular molars furcation, cemento-enamel junction Periodontal disease gallerily.com
21 Alterations in root shape fused root Dwarfed roots
22 Alterations in root shape Concrescence Fused of root surface by cementum Permanent maxillary molars drmohitmangla.blogspot.com
23 Alterations in root shape Hypercementosis Permanent premolars & molars medicine.academic.ru
24 Developmental disturbances of teeth Disturbances in Size Disturbances in Shape Disturbances in Structure Disturbances in Number Disturbances in Eruption R.Rajendran, B.Sivapathasundharam,2007
25 Disturbances in Number Supernumerary tooth Congenital missing Fusion Gemination
26 Disturbances in Number Fusion
27 Disturbances in Number Gemination forum.dentalxp.com
28 Tooth variations Permanent Incisors Permanent Canines Permanent Premolars Permanent molars Deciduous teeth
29 Permanent Incisors Permanent Maxillary Incisors Permanent Maxillary Central Incisors Permanent Maxillary Lateral Incisors Permanent Mandibular Incisors Permanent Mandibular Central Incisors Permanent Mandibular Lateral Incisors
30 Permanent Maxillary Central Incisors Labial Lingual Incisal Mesial Distal
31 Variations of 11,21 Shape : Ovoid, Taper, Square www1.nobelbiocare.com /Veneers3.htm blog.drnormanhuefner.com La grooves B.S.Kraus, R.E.Jordan, L.Abrums,1969
32 Variations of 11,21 La profile; convex B.S.Kraus, R.E.Jordan, L.Abrums,1969
33 Variations of 11, 21 Mammelons Pit/groove at cingulum B.S.Kraus, R.E.Jordan, L.Abrums,1969
34 Variations of 11, 21 Shovel-shaped incisor Hutchinson s incisors
35 Variations of 11, 21 Accessory lingual ridges Extremely long root & short root B.S.Kraus, R.E.Jordan, L.Abrums,1969
36 Permanent Maxillary Lateral Incisors Labial Lingual Incisal Mesial Distal
37 Variations of 12, 22 Peg shape Congenital missing /densindente/densindente.htm
38 Variations of 12, 22 Prominence in the distal lobe Slight prominence Moderate prominence Pronounced prominence B.S.Kraus, R.E.Jordan, L.Abrums,1969
39 Variations of 12, 22 Talons cusp Lingual pit / deep lingual fossa B.S.Kraus, R.E.Jordan, L.Abrums, ipj.quintessenz.de.1jpg.jpg
40 Variations of 12, 22 Dens invaginatus Oral Maxillofacial pathology,2004.
41 Variations of 12, 22 Palato-gingival groove / Palato-radicular groove Curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
42 Permanent Mandibular Central Incisors Labial Lingual Incisal Mesial Distal
43 Permanent Mandibular Lateral Incisors Labial Lingual Incisal Mesial Distal
44 Variations of 31, 41 & 32, 42 La surface inclination Mammelons B.S.Kraus, R.E.Jordan, L.Abrums,1969
45 Variations of 31, 41 & 32, 42 Root: Curvature Longitudinal grooves 2 roots B.S.Kraus, R.E.Jordan, L.Abrums,1969
46 Permanent Canines Permanent Maxillary Canines Permanent Mandibular Canines
47 Permanent Maxillary Canines Labial Lingual Incisal Mesial Distal
48 Variations of 13, 23 Cusp tip: blunted nippled apex Cusp ridge: vertical pitch shoulder B.S.Kraus, R.E.Jordan, L.Abrums,1969
49 Variation of 13, 23 Lingual tubercle or cingulum Root; long, short, hook B.S.Kraus, R.E.Jordan, L.Abrums,1969
50 Permanent Mandibular Canines Labial Lingual Incisal Mesial Distal
51 Variations of 33, 43 Shoulder Inclination of crown : root bending B.S.Kraus, R.E.Jordan, L.Abrums,1969
52 Variations of 33, 43 Root Deep longitudinal groove Juxta-positional root 2 roots B.S.Kraus, R.E.Jordan, L.Abrums,1969
53 Permanent Premolars Permanent Maxillary Premolars Permanent Maxillary First Premolars Permanent Maxillary Second Premolars Permanent Mandibular Premolars Permanent Mandibular First Premolars Permanent Mandibular Second Premolars
54 Permanent Maxillary First Premolars Buccal Lingual Occlusal Mesial Distal
55 Variations of 14, 24 Conical cusp Intercuspal width Blunted cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
56 Variations of 14, 24 Bell shaped premolar Deep buccal groove Mesiobuccal groove B.S.Kraus, R.E.Jordan, L.Abrums,1969
57 Variations of 14, 24 Convergence of root profile Bifurcation point Irregular curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
58 Permanent Maxillary Second Premolars Buccal Lingual Occlusal Mesial Distal
59 Variations of 15, 25 Strongly developed styles Distal tranverse ridge Deep pit Irregular pattern of supplemental grooves B.S.Kraus, R.E.Jordan, L.Abrums,1969
60 Variations of 15, 25 Cusplet Rounded buccal cusp & Conical buccal cusp Irregular curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
61 Permanent Mandibular First Premolars Buccal Lingual Occlusal Mesial Distal
62 Variations of 34, 44 Transverse ridge Mesiolingual groove number depth B.S.Kraus, R.E.Jordan, L.Abrums,1969
63 Variations of 34, 44 Lingual cusp Root Distal style of buccal cusp 2 roots Deep longitudinal groove B.S.Kraus, R.E.Jordan, L.Abrums,1969
64 Permanent Mandibular Second Premolars Buccal Lingual Occlusal Mesial Distal
65 Variations of 35, 45 2 cusped mandibular premolar Pit & groove pattern B.S.Kraus, R.E.Jordan, L.Abrums,1969
66 Variations of 35, 45 M&D styles of buccal cusp Root curvature B.S.Kraus, R.E.Jordan, L.Abrums,1969
67 Permanent Molars Permanent Maxillary Molars Permanent Maxillary First Molars Permanent Maxillary Second Molars Permanent Maxillary Third Molars Permanent Mandibular Molars Permanent Mandibular First Molars Permanent Mandibular Second Molars Permanent Mandibular Third Molars
68 Permanent Maxillary First Molars Buccal Lingual Occlusal Mesial Distal
69 Variations of 16, 26 Oblique ridge Cusp of Carabelli B.S.Kraus, R.E.Jordan, L.Abrums,1969
70 Variations of 16, 26 Styles on MB cusp Variations of the Carabelli trait B.S.Kraus, R.E.Jordan, L.Abrums,1969
71 Variations of 16, 26 small & large Oblique ridge Anterior transverse ridge on MB cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
72 Variations of 16, 26 Curvature of root Board MB root Straight linual root B.S.Kraus, R.E.Jordan, L.Abrums,1969
73 Permanent Maxillary Second Molars Buccal Lingual Occlusal Mesial Distal
74 Variations of 17, 27 Pit-groove patterns B.S.Kraus, R.E.Jordan, L.Abrums,1969
75 Variations of 17, 27 DL cusp 2 MB root Fused MB & L root B.S.Kraus, R.E.Jordan, L.Abrums,1969
76 Permanent Mandibular First Molars Buccal Lingual Occlusal Mesial Distal
77 Variations of 36, 46 Pit & groove pattern Distal cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
78 Variations of 36, 46 Roots!! B.S.Kraus, R.E.Jordan, L.Abrums,1969
79 Permanent Mandibular Second Molars Buccal Lingual Occlusal Mesial Distal
80 Variations of 37, 47 First and Second molar Roots!! B.S.Kraus, R.E.Jordan, L.Abrums,1969
81 Permanent Maxillary Third Molars B.S.Kraus, R.E.Jordan, L.Abrums,1969
82 Permanent Mandibular Third Molars B.S.Kraus, R.E.Jordan, L.Abrums,1969
83 Thank You for your attention!!
84 References B.S.Kraus, R.E.Jordan, L.Abrums. Dental anatomy and occlusion. The Williams and Wikins; Maryland M.M.Ash, S.J.Nelson. Wheeler s Dental Anatomy Physiology, and Occlusion. Saunders; St.Louis R.Rajendran, B.Sivapathasundharam. Shafer s textbook of oral pathology. 5th. Elsevier; New Dheli
85
II. Disturbances in Size.
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