Bài 4

Gingival pocket (also called pseudo-pocket) is formed by gingival enlargement without destruction of the underlying periodontal tissues. The sulcus is deepened because of:

• The increased bulk of the gingiva.

• The attachment loss.

• The bone loss.

• The color of the gingiva.

The destruction of the supporting periodontal tissues, including periodontal attachment and bone, forms:

• Gingival pocket.

• Periodontal pocket.

• Gingival pseudo-pocket.

• Periodontal pseudo-pocket.

Suprabony pocket (supracrestal or supraalveolar) occurs when the bottom of the pocket is:

• Coronal to the underlying alveolar bone.

• Apical to the underlying alveolar bone.

• Coronal to the furcation.

• Apical to the furcation.

Infrabony pocket (infrabony, subcrestal, or intraalveolar) occurs when the bottom of the pocket is:

• Apical to the level of the adjacent alveolar bone.

• Coronal to the underlying alveolar bone.

• Coronal to the furcation.

• Apical to the furcation.

Pockets can also be classified according to the involved tooth surface as Simple, when:

• Two tooth surfaces are involved.

• Only one tooth surface is involved.

• Three tooth surfaces are involved.

• Four tooth surfaces are involved.

Pockets can also be classified according to the involved tooth surface as Compound, when:

• Only one tooth surface is involved.

• Two or more surfaces are involved.

• Only one tooth surface is involved but it is deep pocket.

• Both B and C.

Pockets can also be classified according to the involved tooth surface as Complex / Spinal, when:

• Only one tooth surface is involved.

• Two surfaces are involved.

• Pocket originates on two tooth surface and twisting around the tooth to involve one or more additional surfaces.

• Pocket originates on one tooth surface and twisting around the tooth to involve one or more additional surfaces.

The initial lesion in the development of periodontitis is:

• The inflammation of the gingiva in response to a bacterial challenge.

• The inflammation of the periodontal ligament in response to a bacterial challenge.

• The inflammation of the furcation in response to a bacterial challenge.

• Both B and C.

Changes involved in the transition from the normal gingival sulcus to the pathologic periodontal pocket are associated with:

• Different proportions of bacterial cells in dental plaque.

• Different proportions of saliva in the oral cavity.

• Different proportions of foods which usually eaten.

• Different location of dental carries.

Healthy gingiva is associated with:

• Few microorganisms, mostly coccoid cells and bacillid cells.

• Few microorganisms, mostly spiral bacteria and coccoid cells.

• Few microorganisms, mostly coccoid cells and straight rods.

• Increased numbers of Spirochetes.