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
When performing endodontic surgery on anterior crowned teeth, the ideal surgical flap design is a 
Select and explain. 
A. Full thickness rectangular flap, B. Full thickness triangular flap, C. Submarginal Leubke-Ochsenbein flap, D. Submarginal semilunar flap
C: Submarginal Leubke-Ochsenbein flap
Answer: C: Submarginal Leubke-Ochsenbein flap 
Explanation: None