Factors associated with external root resorption

 # Following are the factors associated with external root resorption except:

A. Grafting of alveolar clefts

B. Cysts

C. Orthodontic therapy

D. Endodontic therapy

The correct answer is A. Graft of alveolar clefts.

Risk factors associated with severe resorption are:

- Shorter than average roots.

- Previously traumatized teeth.

- Nonvital teeth.

- Teeth subjected to excessive forces.

- Combination of orthodontic and orthognathic procedures.

Reference: Shafer’s Textbook of ORAL PATHOLOGY, 7th Edition, Page No: 930

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