free gingival margin

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(mar'jin) [L. margo, border]
1. A border or boundary such as the edge of a structure, or of a pathological specimen removed from the body surgically. See: margo
2. In dentistry, the apical extent or boundary of enamel adjacent to the cementum of the tooth root; the junction of a restoration with the cavosurface angle of a prepared cavity in enamel.

costal margin

The lower (abdominal) border of the front of the rib cage formed by the costal cartilages of ribs 7 to 10.

free gingival margin


gingival margin


margin of resection

Surgical margin.

surgical margin

The border of a tissue specimen that has been removed surgically from the body. It is often marked with an indelible dye to make it easily visible to the pathologist.

Patient care

When obtaining biopsy specimens from a patient, the practitioner's goal is to obtain a tissue specimen that completely surrounds the lesion, so that the margins are free, i.e. not visibly penetrated by tumor cells.

Synonym: margin of resection
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The periodontal parameters included the following assessments: (i) pocket depth: the distance of the free gingival margin to the base of the probable pocket, recorded to the nearest millimeter and (ii) gingival recession, the location of the free gingival margin in relation to the cementoenamel junction (positive if located apical to the cementoenamel junction and negative if located coronal to the cementoenamel junction).
While the anatomical crown is the portion of the natural tooth that extends from the cemento-enamel junction (CEJ) to the occlusal/incisal edge, the clinical crown is the portion of the crown that extends from the free gingival margin to the occlusal/incisal edge.
The scores from the four areas of the tooth are added and divided by four in order to give the plaque index for the tooth with the following scores and criteria: 0-No plaque; 1-A film of plaque adhering to the free gingival margin and adjacent area of the tooth.
For this study clinical attachment was defined as the distance from the cement-enamel junction to the free gingival margin, and probing depth as the distance from the free gingival margin to the bottom of the pocket/sulcus.