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Disorders of development of Teeth

Dnt 243 Oral Pathology. Disorders of development of Teeth. Dr.Shahzadi Tayyaba Hashmi. Abnormalities in Size of Teeth. A . Microdontia (small teeth): One or more teeth that are smaller than normal

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Disorders of development of Teeth

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  1. Dnt 243 Oral Pathology Disorders of development of Teeth Dr.Shahzadi Tayyaba Hashmi

  2. Abnormalities in Size of Teeth A. Microdontia (small teeth): • One or more teeth that are smaller than normal • When all the teeth in both arches are smaller than normal, the condition is termed as generalized microdontia Examples: • Maxillary lateral incisors (peg laterals) • Maxillary third molars

  3. Abnormalities in Size of Teeth B. Macrodontia (Large teeth): • One or more teeth that are larger than normal • When all the teeth in both arches are larger than normal, the condition is termed as generalized macrodontia Examples: • Mandibular cuspids (canines)

  4. Abnormalities in Shape • Dilaceration : • a sharp bend or angulation involving the root of a tooth • Can be seen radiographicaly Causes: • Trauma during tooth development • Continued rood formation during a curved path of eruption

  5. Abnormalities in Shape • Taurodontism: • Taurodontism means bull-like teeth • A developmental disorder that primarily affects molars • Both permanent and deciduous teeth may be affected • Teeth exhibits rectangular shape and apically displaced furcation results in large pulp chamber and short pulp canals

  6. taurodontism

  7. Abnormalities in Shape • Dens invaginatus: • Commonly known as dens in dente (a tooth within tooth) • Primarily affects permanent maxillary lateral incisors • Teeth with deep invaginations develop Pulpitis, pulpal necrosis and inflammatory peri apical disease

  8. Abnormalities in Shape • Gemination: • A developmental dental anomaly characterized by a single rooted tooth with wide, partly divided crown or two separate crowns • Caused by incompletely divided tooth germ • Gemination can affect permanent and deciduous dentitions

  9. Abnormalities in Shape • Fusion: • A developmental dental anomaly characterized by abnormally shaped tooth that exhibits a wide crown or a normal crown with an additional root • Fusion results when two adjacent tooth germs merge producing one tooth • Incisors are commonly affected

  10. Fusion ( commonly seen in incisors) Gemination

  11. Abnormalities in Shape • Concrescence: • In concrescence, roots of the adjacent teeth are joined by cementum • Primarily affects permanent maxillary molars

  12. Abnormalities in Shape Enamel pearls : • An enamel pearl is a condition of teeth where enamel is found on locations where enamel is not supposed to be, such as on a root surface • They are found usually in the area between roots, which is called a furcation, of molars • Enamel pearls are not common in teeth with a single root

  13. ESSENTIAL REFERENCES • Oral Pathology for the Dental Hygienist (5th Edition) By Olga A. C. Ibsen, RDH, MS and Joan • Contemporary for oral and maxillofacial pathology by J.Phillip Sapp, Lewis Roy Eversole

  14. THANK YOU

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