Background:The gold standard for treating adolescent idiopathic scoliosis (AIS) is widely acknowledged to be thoracic hook instrumentation. The present study was conducted to compare pedicle screw construct and other constructs in adolescent idiopathic scoliosis. Materials & Methods:90 cases of right thoracicLenke 1 AISof both genderswere divided into 3 groups. Group I consisted of 30 patients in whom the universal system with segmental intraspinous collar button wires was used. Group II consisted of 30 patients in whom a hybrid construct was used. Group III consisted of 30 patients with a segmental pedicle screw construct. Parameters such as preoperative flexibility (PF), cincinnaticorrection index (CCI), and Kyphosis correction (KC) etc. were recorded. Results: Group I had 18 males and 12 females, group II had 20 males and 10 females and group III had 13 males and 17 females. The mean preoperative flexibility (PF) was 45% in group I, in group II was 56% and in group III was 53%. The mean Cincinnati correction index (CCI) was 1.92 in group I, 1.30 in group II and 1.47 in group III. The mean Kyphosis correction (KC) was -41 in group I, in group II was +!2 and in group III was -38. The difference was significant (P< 0.05). Conclusion: When the preoperative flexibility of the curve was taken into account, the pedicle screw alonedesign did not result in an improved correction of Lenke 1 AIS.