What defines subgingival calculus?

Subgingival calculus is defined as calculus that forms on root surfaces below the gingival margin. This type of calculus is commonly associated with periodontal disease and is often found in areas where there is bone loss and deepening periodontal pockets. Its formation is a result of plaque accumulation that mineralizes over time below the gum line.

Understanding the specific location of subgingival calculus is crucial for dental professionals in order to develop appropriate treatment plans. It is important to note that while other forms of calculus exist, such as supragingival calculus, which forms above the gingival margin, subgingival calculus is distinct in location and characteristics. Additionally, while it can occur in periodontal pockets, it is not limited to these sites, making those choices less accurate in defining what subgingival calculus specifically refers to.

The key focus in recognizing subgingival calculus is its placement below the gingival margin on the root surfaces, which is critical for maintaining periodontal health and hygiene practices.