Handbook of Oral Pathology and Oral Medicine

S. R. Prabhu

• Verlag: Wiley-Blackwell
• Jahr: 2021
• ISBN:
  9781119781158
• Auflage: 1
• Thema: Medicina
• Thema: Salute e chirurgia orale

Handbook of Oral Pathology and Oral Medicine

Discover a concise overview of the most common oral diseases in a reader-friendly book

Handbook of Oral Pathology and Oral Medicine delivers a succinct overview of a range of oral diseases. The book contains up-to-date evidence-based information organized by clinical topic and supported by over 300 clinical, radiological, and microscopic images. Each chapter includes topics following universally respected curricula of oral pathology and oral medicine.

Divided into seven parts, it covers core topics such as pathology of teeth, pulp, and supporting structures, pathology of jawbones, pathology of the oral mucosa, pathology of the salivary glands, clinical presentation of mucosal disease, orofacial pain, and miscellaneous topics of clinical relevance.

Written for undergraduate dental students, dental hygienists and oral health therapists, Handbook of Oral Pathology and Oral Medicine is an ideal quick reference and is also useful to dental educators and practitioners.

Part I
Pathology of Teeth and Supporting Structures

1
Disorders of Tooth Development and Eruption

---

CHAPTER MENU

1. 1.1 Anodontia, Hypodontia and Oligodontia
2. 1.2 Hyperdontia (Supernumerary Teeth)
3. 1.3 Microdontia and Macrodontia
4. 1.4 Gemination, Fusion and Concrescence
5. 1.5 Taurodontism and Dilaceration
6. 1.6 Amelogenesis Imperfecta
7. 1.7 Dentinogenesis Imperfecta
8. 1.8 Dentinal Dysplasia (Dentin Dysplasia)
9. 1.9 Regional Odontodysplasia (Ghost Teeth)
10. 1.10 Delayed Tooth Eruption
11. 1.11 Tooth Impaction (Impacted Teeth)
12. 1.12 Dens Invaginatus and Dens Evaginatus
13. 1.13 Fluorosis (Mottled Enamel)
14. 1.14 Tetracycline‐Induced Discolouration of Teeth: Key Features
15. 1.15 Enamel Pearl: Key Features
16. 1.16 Talon Cusp: Key Features
17. 1.17 Hutchinson's Incisors and Mulberry Molars: Key Features
18. 1.18 Tooth Ankylosis: Key Features
19. 1.19 Supernumerary Roots: Key Features

---

1.1 Anodontia, Hypodontia and Oligodontia

1.1.1 Definition/Description

• Anodontia: All teeth are developmentally (congenitally) missing
• Hypodontia: one to six developmentally (congenitally) missing teeth except the third molars
• Oligodontia: more than six developmentally (congenitally) missing teeth

1.1.2 Frequency

• Anodontia: extremely rare
• Hypodontia: incidence: 4.4–13.4%. The most common developmental anomaly
• Oligodontia: incidence: 0.25%
• Hypodontia of the deciduous teeth affects less than 1% of children

  

  Figure 1.1 Hypodontia: clinical photograph of missing maxillary lateral incisors

  (source: Bin im Garten, https://commons.wikimedia.org/wiki/File:Hypodontie_der_zweiten_oberen_Schneidz%C3%A4hne_IMG_1726.webp. Licensed under CC BY‐SA 3.0).

1.1.3 Aetiology/Risk Factors

• Anodontia: mutations in EDA, EDAR and EDARADD genes
• Hypodontia: mutations in MSX1, PAX9, IRF6, GREM2, AXIN2, LRP6, SMOC2, LTBP3, PITX2 and WNT10B. WNT10A genes
• Oligodontia: mutations in MSX1, PAX9, IRF6, GREM2, AXIN2, LRP6, SMOC2, LTBP3, PITX2 and WNT10B. WNT10A genes
• Environmental factors: hypodontia can result from trauma to the developing dental tissues such as chemotherapy or radiotherapy

1.1.4 Clinical Features

• The most common missing multiple teeth (other than third molars) are:
  • Maxillary lateral incisors (Figure 1.1). This is followed by the mandibular second premolars and maxillary second premolars
  • Skin/nails/hair/sweat glands may be affected in some cases of hypodontia
  • Morphology of teeth may be defective (micr...