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Gums

life science Maturity 9-11 Next article →

The gums, also known as the gingiva, are essential mucosal tissues. They lie over the mandible and maxilla inside the mouth.

Periodontium
Periodontium

These tissues surround the teeth to provide a protective seal. Unlike the soft linings of the cheeks, the gums are tightly bound to the underlying bone. This attachment helps them resist the friction of food during chewing. When healthy, the gingiva acts as a strong barrier. It protects deeper tissues from various periodontal insults. Maintaining gum health is vital for overall bodily health.

Anatomically, the gingiva is divided into three distinct areas. The first is the marginal gum, which forms a collar around the teeth. This area is quite thin, measuring between 0.5 and 2.0 mm in width. It follows the scalloped pattern of the cementoenamel junction, or CEJ. The second area is the attached gum. This tissue is firm, resilient, and tightly bound to the periosteum of the alveolar bone. Its width varies by location. In the maxillary incisor region, it is 3.5 to 4.5 mm wide. In the mandibular incisor region, it is 3.3 to 3.9 mm wide. The width is smallest in the first premolar area, measuring only 1.9 mm in the maxilla and 1.8 mm in the mandible.

The third area is the interdental gum. This tissue occupies the gingival embrasure, which is the space beneath the contact points of the teeth. The interdental papilla may have a pyramidal shape or a shape called a col. A col is a nonkeratinized area of epithelium. It is most common in the broad spaces between posterior teeth. In the absence of contact between teeth, the attached gum extends uninterrupted. The different parts of the gum work together to stabilize the teeth. They provide a complex structure that resists the mechanical forces of eating.

Healthy gums have very specific clinical characteristics. Their color is often described as coral pink. However, natural melanin pigmentation can cause darker spots or patches.

Hyperpigmentation of the gum
Hyperpigmentation of the gum

The texture of healthy tissue is firm and resistant to movement. It often displays stippling, which is a surface texture similar to an orange peel. The contour should appear smooth and scalloped around each tooth. Healthy gums also maintain a "knife-edge" thinness at the free gingival margin. They should not bleed when subjected to normal brushing or probing.

Disease occurs when the gingival microecosystem changes. Food residues and saliva can fuel the growth of microorganisms. If oral hygiene is insufficient, bacterial plaque can accumulate. This buildup leads to inflammation, often called gingivitis. Inflamed gums may appear red, swollen, or puffy. They may also bleed easily or produce purulent exudate. If the condition advances, it becomes periodontitis. This disease affects the deeper periodontium. It can lead to a poor prognosis for keeping the teeth long-term.

One serious complication is gingival recession. This is the apical movement of the gum margin away from the biting surface. Recession can be caused by inflammation, dry mouth, or mechanical means like brushing. It can also result from chemical or surgical factors. When the gums recede, they may expose the dental neck. This exposure can leave the tooth vulnerable to external stimuli. This often causes increased root sensitivity for the individual.

Dental professionals rely on these clinical signs to provide care. They examine the color, texture, and contour of the tissue. They also look for bleeding on probing, or BOP. These observations help them decide on the correct periodontal therapy. They also determine the specific homecare instructions a patient needs. Understanding the histology and appearance of the gingiva is central to restorative care. Protecting these tissues is a key part of maintaining oral and general health.

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File:Periodontium.svg
Periodontium.svg
File:Hyperpigmentation of the gum.jpg
Hyperpigmentation of the gum.jpg
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