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Gingiva
The gingiva (sing. and plur.: ''gingivae''), or gums, consist of the mucosal tissue that lies over the mandible and maxilla inside the mouth.
==Structure==
Gingiva are part of the soft tissue lining of the mouth. They surround the teeth and provide a seal around them. Compared with the soft tissue linings of the lips and cheeks, most of the gingivae are tightly bound to the underlying bone which helps resist the friction of food passing over them. Thus when healthy, it presents an effective barrier to the barrage of periodontal insults to deeper tissue. Healthy gingiva are usually coral pink, but may contain melanin pigmentation.
Changes in color, particularly increased redness, together with edema and an increased tendency to bleed, suggest an inflammation that is possibly due to the accumulation of bacterial plaque. Overall, the clinical appearance of the tissue reflects the underlying histology, both in health and disease. When the gingival tissue is not healthy, it can provide a gateway for periodontal disease to advance into the deeper tissue of the periodontium, leading to a poorer prognosis for long-term retention of the teeth. Both the type of periodontal therapy and homecare instructions given to patients by dental professionals and restorative care are based on the clinical conditions of the tissue.〔
The gingiva is divided anatomically into marginal, attached and interdental areas.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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