A patient has remaining lower anterior teeth with Class III mobility and edentulous posterior mandible opposing a maxillary complete denture. What is the DIAGNOSIS?

Correct answer: D. Combination syndrome (Kelly's syndrome)

• A. Incorrect. Chronic periodontitis could explain the mobility, but the overarching clinical syndrome with these specific prosthodontic/anatomical features is combination syndrome.
• B. Incorrect. Occlusal trauma is a contributing factor but not the overarching diagnosis.
• C. Incorrect. Aggressive periodontitis affects younger patients with rapid bone loss but doesn't describe the specific pattern of this maxillary complete denture vs. lower anterior natural teeth scenario.
• D. Correct. COMBINATION SYNDROME (Kelly's syndrome) occurs with a maxillary complete denture opposing natural mandibular anterior teeth (with posterior edentulism). Classic findings: maxillary anterior ridge resorption, tuberosity hyperplasia, papillary palatal hyperplasia, supraeruption/mobility of lower anteriors, and bone loss under the lower posterior saddle.