Tooth Variations Suruedee Chinthakanan
Tooth variations Dental anomalies Cause : hereditary factor Developmental disturbances of teeth www.ectodermaldysplsia.org
Tooth variations Enamel is formed from the ectodermal components. Dentin, pulp, cementum, the supporting PDL, and bone are all derived from ectomesenchyme http://www.uic.edu/classes/orla/orla312/variationintoothmorphology.htm
Developmental disturbances of teeth Disturbances in Size Disturbances in Shape Disturbances in Structure Disturbances in Number Disturbances in Eruption R.Rajendran, B.Sivapathasundharam,2007
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 www.medical-dictionary.thefreedictionary.com
Developmental alterations in shape of teeth Alterations in crown shape Alterations in root shape
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 www.nature.com
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 www.studyblue.com
Alterations in crown shape Palatogingival groove permanent incisors Dental caries & periodontal disease pocketdentistry.com www.ijds.in www.slideshare.net
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 www.ascro.net www.ejournalofdentistry.com
Alterations in crown shape Accessory cusps permanent premolars and molars www.jaypeejournals.com
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 www.studyblue.com www.uniondentalsurgery.com blog.xuite.net
Alterations in crown shape Variation of cusp of carabelli Vary in size ; may be absent Vary in location www.dimensionsofdentalhygiene.com
Alterations in crown shape cervical enamel extension (cervical enamel projection) mandibular molars > maxillary molars Periodontal disease www.studyblue.com
Alterations in crown shape Taurodontism Large pulp chamber, apically bifurcation Oral Maxillofacial pathology,2004.
Alterations in crown shape Hutchinson s incisor / mulberry molar congenital syphilis www.sfmedia.dental.pacific.edu
medical-dictionary.thefreedictionary.com Alterations in root shape
Alterations in root shape Dilaceration permanent maxillary incisors Root canal treatment, extraction www.researchgate.net J.A.Regezi, J.J.Sciubba, R.C.K.Jordan,2008 www.studyblue.com
Alterations in root shape Accessory roots (supernumerary roots) third molars, mandibular canines, premolars Root canal treatment, extraction www.forp.usp.br medind.nic.in quizlet.com
Alterations in root shape Enamel pearls maxillary molars > mandibular molars furcation, cemento-enamel junction Periodontal disease gallerily.com www.studyblue.com www.methuenperio.com
Alterations in root shape fused root Dwarfed roots www.doctoruldedinti.info www.studyblue.com
Alterations in root shape Concrescence Fused of root surface by cementum Permanent maxillary molars www.studyblue.com drmohitmangla.blogspot.com
Alterations in root shape Hypercementosis Permanent premolars & molars medicine.academic.ru www.scielo.br
Developmental disturbances of teeth Disturbances in Size Disturbances in Shape Disturbances in Structure Disturbances in Number Disturbances in Eruption R.Rajendran, B.Sivapathasundharam,2007
Disturbances in Number Supernumerary tooth Congenital missing Fusion Gemination www.scienceopen.com www.studyblue.com
Disturbances in Number Fusion www.studyblue.com www.ijdr.in www.studyblue.com
Disturbances in Number Gemination www.dentalaegis.com forum.dentalxp.com www.studyblue.com www.contempclindent.org
Tooth variations Permanent Incisors Permanent Canines Permanent Premolars Permanent molars Deciduous teeth
Permanent Incisors Permanent Maxillary Incisors Permanent Maxillary Central Incisors Permanent Maxillary Lateral Incisors Permanent Mandibular Incisors Permanent Mandibular Central Incisors Permanent Mandibular Lateral Incisors
Permanent Maxillary Central Incisors Labial Lingual Incisal Mesial Distal
Variations of 11,21 Shape : Ovoid, Taper, Square www1.nobelbiocare.com www.habdcprostho.com/prosthodontics /Veneers3.htm blog.drnormanhuefner.com La grooves B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 11,21 La profile; convex B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 11, 21 Mammelons Pit/groove at cingulum B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 11, 21 Shovel-shaped incisor www.fossa-medicaldictionary.thedictionary.com www.nature.com Hutchinson s incisors www.sfmedia.dental.pacific.edu
Variations of 11, 21 Accessory lingual ridges Extremely long root & short root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Maxillary Lateral Incisors Labial Lingual Incisal Mesial Distal
Variations of 12, 22 Peg shape Congenital missing www.dental.mu.edu/oralpath/lesions /densindente/densindente.htm www.blledental.com.edu
Variations of 12, 22 Prominence in the distal lobe Slight prominence Moderate prominence Pronounced prominence B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 12, 22 Talons cusp Lingual pit / deep lingual fossa B.S.Kraus, R.E.Jordan, L.Abrums,1969 www.ascro.net ipj.quintessenz.de.1jpg.jpg
Variations of 12, 22 www.jaypeejournals.com Dens invaginatus www.mndental.org Oral Maxillofacial pathology,2004.
Variations of 12, 22 Palato-gingival groove / Palato-radicular groove Curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular Central Incisors Labial Lingual Incisal Mesial Distal
Permanent Mandibular Lateral Incisors Labial Lingual Incisal Mesial Distal
Variations of 31, 41 & 32, 42 La surface inclination Mammelons B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 31, 41 & 32, 42 Root: Curvature Longitudinal grooves 2 roots B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Canines Permanent Maxillary Canines Permanent Mandibular Canines
Permanent Maxillary Canines Labial Lingual Incisal Mesial Distal
Variations of 13, 23 Cusp tip: blunted nippled apex Cusp ridge: vertical pitch shoulder B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variation of 13, 23 Lingual tubercle or cingulum Root; long, short, hook B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular Canines Labial Lingual Incisal Mesial Distal
Variations of 33, 43 Shoulder Inclination of crown : root bending B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 33, 43 Root Deep longitudinal groove Juxta-positional root 2 roots B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Premolars Permanent Maxillary Premolars Permanent Maxillary First Premolars Permanent Maxillary Second Premolars Permanent Mandibular Premolars Permanent Mandibular First Premolars Permanent Mandibular Second Premolars
Permanent Maxillary First Premolars Buccal Lingual Occlusal Mesial Distal
Variations of 14, 24 Conical cusp Intercuspal width Blunted cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 14, 24 Bell shaped premolar Deep buccal groove Mesiobuccal groove B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 14, 24 Convergence of root profile Bifurcation point Irregular curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Maxillary Second Premolars Buccal Lingual Occlusal Mesial Distal
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
Variations of 15, 25 Cusplet Rounded buccal cusp & Conical buccal cusp Irregular curvature of root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular First Premolars Buccal Lingual Occlusal Mesial Distal
Variations of 34, 44 Transverse ridge Mesiolingual groove number depth B.S.Kraus, R.E.Jordan, L.Abrums,1969
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
Permanent Mandibular Second Premolars Buccal Lingual Occlusal Mesial Distal
Variations of 35, 45 2 cusped mandibular premolar Pit & groove pattern B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 35, 45 M&D styles of buccal cusp Root curvature B.S.Kraus, R.E.Jordan, L.Abrums,1969
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
Permanent Maxillary First Molars Buccal Lingual Occlusal Mesial Distal
Variations of 16, 26 Oblique ridge Cusp of Carabelli B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 16, 26 Styles on MB cusp Variations of the Carabelli trait B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 16, 26 small & large Oblique ridge Anterior transverse ridge on MB cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 16, 26 Curvature of root Board MB root Straight linual root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Maxillary Second Molars Buccal Lingual Occlusal Mesial Distal
Variations of 17, 27 Pit-groove patterns B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 17, 27 DL cusp 2 MB root Fused MB & L root B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular First Molars Buccal Lingual Occlusal Mesial Distal
Variations of 36, 46 Pit & groove pattern Distal cusp B.S.Kraus, R.E.Jordan, L.Abrums,1969
Variations of 36, 46 Roots!! B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular Second Molars Buccal Lingual Occlusal Mesial Distal
Variations of 37, 47 First and Second molar Roots!! B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Maxillary Third Molars B.S.Kraus, R.E.Jordan, L.Abrums,1969
Permanent Mandibular Third Molars B.S.Kraus, R.E.Jordan, L.Abrums,1969
Thank You for your attention!!
References B.S.Kraus, R.E.Jordan, L.Abrums. Dental anatomy and occlusion. The Williams and Wikins; Maryland. 1969. M.M.Ash, S.J.Nelson. Wheeler s Dental Anatomy Physiology, and Occlusion. Saunders; St.Louis. 2003. R.Rajendran, B.Sivapathasundharam. Shafer s textbook of oral pathology. 5th. Elsevier; New Dheli. 2007.