Knife-edged gingiva refers to a specific appearance of the gum tissue where the gum line exhibits a sharp, thin, and pointed edge. This distinct feature is characterized by a complete closure of the interdental space (the space between teeth) below the contact point of adjacent teeth. Essentially, the gums meet in a clean, sharp line between the teeth, resembling the edge of a knife.
This sharp, knife-like gingival margin is often contrasted with other gum line appearances that might be more rounded, puffy, or inflamed. The interdental papilla (the gum tissue filling the space between teeth) is crucial here; in knife-edged gingiva, this papilla reaches its peak precisely at the contact point of the adjacent teeth, creating the distinctive, sharp edge.
Clinical Significance
The presence of knife-edged gingiva can be an indicator of healthy gum tissue in some instances. However, it's important to note that this is not always the case. Further examination is needed to ensure overall periodontal health. While a sharp margin can be a sign of good health, it’s equally important to rule out any underlying conditions.
The reference provided emphasizes that this knife-edged appearance completely closes the interdental space below the contact point of adjacent teeth. This precision in the gingival margin's location is key to identifying this particular gingival form.
