This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
The periodontium remains healthier when crown margins 
are placed 
Select and explain. 
A. At the gingival crest, B. Above the gingival margin, C. About 1/2 mm apical to the gingival crest, D. About 1 mm apical to the gingival crest
B: Above the gingival margin
Answer: B: Above the gingival margin 
Explanation: None