Rotational force of extraction is used for delivery of which tooth out of the socket?

 # Rotational force of extraction is used for delivery of which tooth out of the socket?

A. Upper central incisors and lower premolars

B. Upper centrals and lateral incisors

C. Upper and lower central incisors

D. Upper premolars and lower central incisors

The correct answer is A. Upper central incisors and lower premolars.

Rotational pressure, as the name implies, rotates the tooth, which causes some internal expansion of the tooth socket and tearing of periodontal ligaments. Teeth with single, conical roots (such as maxillary incisors and mandibular premolars) and those with roots that are not curved are most amenable to luxation by this technique. Teeth that have other than conical roots or that have multiple roots—especially if those roots are curved—are more likely to fracture under this type of pressure.

Ref: Contemporary Oral and Maxillofacial Surgery 6th Edition, Hupp