What is an example of physical trauma as a risk factor in periodontal health?

Improper brushing techniques are considered a form of physical trauma that can negatively impact periodontal health. When brushing is done too aggressively or with a hard-bristled toothbrush, it can lead to damage of the gingival tissue and loss of attachment. This trauma can manifest as gingival recession, abrasion of enamel, and increased susceptibility to periodontal disease due to irritation of the gum tissue.

In contrast, the other options relate to factors that can influence periodontal health but do not specifically involve physical trauma. Eating sugary foods primarily contributes to the risk of caries and may indirectly affect periodontal health through plaque accumulation, but it doesn't directly cause tissue trauma. Smoking tobacco products is a behavioral risk factor that affects healing and increases the severity of periodontal disease. Low calcium levels refer to nutritional deficiencies that can impact overall oral health, but they do not involve physical damage to periodontal tissues.