Focused clinical question: What are the fundamental debates and questions related to the newly developed two-vector system for classification of periodontal diseases that have emerged as to how to accurately assign, stage, and grade periodontitis cases? The aim of the present manuscript is to demonstrate the essential thought processes that are needed in utilizing the new periodontitis classification system to diagnose two gray zone cases.
Summary: Clinical case 1 includes an 83-year-old male diagnosed with periodontitis and classified as Stage III Generalized Grade B periodontitis, while clinical case 2, a 73-year-old male was classified as presenting Stage IV Generalized Grade B periodontitis. Although clinical and radiographic evaluations revealed similarities between the cases, the thought process that includes clinical judgment is described to guide a more accurate diagnosis following the guidelines of the new classification system.
Conclusion: The two cases demonstrated here offer an opportunity for clinicians to recognize the essential role of sound clinical judgment in certain cases when applying the new periodontal disease classification system and also clarify questions emerging from implementing this classification system.
Keywords: Staging and grading of periodontal diagnosis; gray zones; periodontal diagnosis; periodontal diseases; periodontitis.
© 2020 American Academy of Periodontology.