22
Participants
Start Date
January 31, 2017
Primary Completion Date
May 31, 2018
Study Completion Date
August 31, 2018
O'Ring Attachment (A)
Attachment A will be inserted in three months of follow up,followed by treatment B in a random order
Equator Attachment (B)
Attachment B will be inserted in three months of follow up,followed by treatment A in a random order
Universidade Federal de Goias
OTHER