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
In guided tissue regeneration technique for root coverage, the titanium-reinforced membrane was used
by___________ to create space beneath the membrane. 
Select and explain. 
A. Tinti and Vincenzi, B. Pini-Prato and Tonetti, C. Ramfjord and Nissle, D. Widman and Cohen
A: Tinti and Vincenzi
Answer: A: Tinti and Vincenzi 
Explanation: None