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: Surgery
Submucosal vestibuloplasty as a ridge extension procedure was described by? 
Select and explain. 
A. Trauner, B. Obwegeser, C. Baumer, D. Visor
B: Obwegeser
Answer: B: Obwegeser 
Explanation: Self explanatory