In our series of 76 adolescent affected by AIS, we reported mean PI values of 48.9° with a mean pre-operative PT of 11.51°. After surgery we observed an increase in the PT mean value, about three degrees higher than the ideal value, meaning that there was some compensatory mechanism. Patients affected by AIS showed a slight posterior imbalance and the intervention of scoliosis correction seems to cause a slight further posterior imbalance, especially in Lenke 1 type curves and in patients with hypokyphosis. The clinical significance of this slight imbalance must be carefully evaluated. Further studies are necessary to better establish which could be the best surgical strategy to obtain an optimal spinal sagittal balance.
Arthroscopic functional repair could be considered an appropriate treatment option in case of massive, contracted and immobile cuff tears. This treatment can provide improvement in pain and function that positively affects patients' quality of life without precluding other, more invasive, eventually consequent solutions.
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