“…However, stability cannot be considered as a primary outcome of orthodontic treatment, since a lot of evidence shows that retention protocols are the only way to avoid relapse [ 50 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 ]. Consequently, the choice to extract or not can be driven by other factors, such as facial type and the mandibular symphysis thickness [ 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ]. These parameters nowadays have not been taken too much into account from the literature, however, in our opinion, those factors have great relevance in this complex and insidious decisional process.…”