3.4.1. LOCAL Kyphosis Deformity after Implant Removal

Among the 27 observational studies, 20 studies reported varying degrees of sagittal correction loss or local kyphosis deformity, while two studies [43,46] reported no significant kyphosis of the fracture area. In detail, six studies reported average correction loss of less than 5◦ [39,45,53,55,56,64], nine studies reported 5◦–10◦ average correction loss [40,42,47,48,50,51,54,56,60,63], three studies reported more than 10◦ average correction loss [38,49,58], and two studies reported 63.9% and 29% local kyphotic deformity after implant removal [57,61].
