9.  Ionizing radiation and regressive alterations of the oral cavity

Q. 2. Mention causes of resorption of roots.

Ans.

a. External resorption may occur due to:

• Periapical inflammation

• Tumours and cysts

• Reimplantation

• Excessive mechanical or occlusal forces (e.g., orthodontic treatment) especially in hypothyroidism

• Impacted teeth

• Idiopathic (maxillary premolars–maximum; mandibular incisors and molars—least)

• Trauma

• Hormonal imbalances

b. Internal resorption

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Apr 11, 2016 | Posted by in Orthodontics | Comments Off on 9.  Ionizing radiation and regressive alterations of the oral cavity

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