Which statement about the 2017 classification is TRUE?

The correct statement about the 2017 classification of periodontal diseases is that it includes a multidimensional staging and grading system for classifying cases of periodontitis. This classification approach is innovative because it considers not only the clinical manifestation of the disease but also its complexity and potential impact on the patient's health. Staging involves assessing the severity of the disease based on clinical and radiographic parameters, while grading reflects the rate of disease progression and individual risk factors such as smoking and systemic conditions. This comprehensive system allows for a more accurate diagnosis and tailored treatment planning, leading to improved patient outcomes.

In contrast to this, the other options either misrepresent the classification or focus on aspects that are not applicable. For instance, the classification is not focused solely on periodontal disease as it acknowledges the interrelationship between periodontal health and systemic health. Furthermore, it does not rely on clinical attachment levels alone, but rather incorporates various clinical indicators and risk factors. Lastly, the classification distinctly differentiates between different types of periodontitis, such as chronic and aggressive forms, allowing clinicians to address each situation appropriately.