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Circular Fibers
Tooth (Mandibular First Molar)

Circular Fibers

Fibrae circulares

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Quick Facts

The circular fibers are gingival fibers that pass through the connective tissue of the marginal and interdental gingivae and encircle the tooth in ringlike fashion (Dorland, 2011).

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Structure and/or Key Feature(s)

Gingival connective tissue is comprised of 60% fibroblasts, 5% vessels and nerves, and 35% matrix. There are four types of gingival fibers:

—dentogingival group;

—alveologingival group;

—circular group;

—dentoperiosteal fibers (Rajendran and Selvam, 2015).

Anatomical Relations

The fibers of the circular group are a smaller group of fibers that encircle the tooth and weave between the other fibers (Rajendran and Selvam, 2015).


Circular fibers, as part of the gingival fiber group, are responsible for anchoring the marginal gingiva to the tooth and providing the tooth with sufficient rigidity to withstand the forces of mastication (Rajendran and Selvam, 2015).


Dorland, W. (2011) Dorland's Illustrated Medical Dictionary. 32nd edn. Philadelphia, USA: Elsevier Saunders.

Rajendran, M. and Selvam, U. A. (2015) 'Transseptal fibers - crosslinking convolutes: A review', Int J Contemp Dent Med Rev.

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