Definition and Classification of Periodontal Pocket
The periodontal pocket is defined as a pathologically deepened gingival sulcus.
Depending upon its morphology:
Gingival/false pocket:Formed by gingival enlargement without destruction of the underlying periodontal disease.
The sulcus is deepened because of the increased bulk of gingiva.
Periodontal/True pockets:This pocket occurs with destruction of the supporting periodontal tissue.
Divided into two categories:
Base of Pocket is coronal to level of the alveolar bone.
Base of the pocket is apical to crest of alveolar bone.
Pattern of destruction of underlying bone is horizontal
Pattern of bone destruction is vertical
Interproximally, transseptal, fibres are arranged horizontally in the space between base of the pocket and alveolar bone.
Interproximally, transseptal fibers are oblique rather than horizontal.
On the facial and lingual surfaces, periodontal ligament fiber beneath pocket follow horizontal-oblique course between the tooth and bone.
On facial and lingual surfaces periodontal ligament fibers follow angular pattern of adjacent bone.
Depending upon the number of surface:
Involves only one surface
Pocket present on 2 or more surface.
Originate on one tooth surface and twisting around the tooth of one or more additional surfaces.
Depending upon the nature of the soft tissue wall of the pocket:
- Edematous pocket.
- Fibrotic pocket.
Depending upon the disease activity:
- Active pocket
- Inactive pocket