[Assessment of correction effect in relation to fulcrum bending flexibility in adult idiopathic scoliosis patients].
OBJECTIVE
To study the relationship between the fulcrum bending flexibility (FBF) and correction rate (CR) of adult idiopathic scoliosis, and to explore the ability of FBF to assess the correction effect in relation to fulcrum bending flexibility.


METHODS
69 patients with adult idiopathic scoliosis with structural curves at thoracic or lumbarthoracic segments, 16 males and 53 females, aged 26.5 (19 - 53) were treated by pedicle screws instrumentation. Pre-operative standing and fulcrum bending films and postoperative standing X-ray film were taken. Cobb angle was measured. The data underwent regression analysis with the software SPSS 10.0.


RESULTS
A regression formula was established: CR = 0.213 + 0.768 x FBF with P < 0.01.


CONCLUSIONS
A definite linear relation exists between the FBF and CR of adult idiopathic scoliosis. By using the formula in proper samples, the effects of new instrumentation or correction technique can be objectively assessed.
Yin
Ruo-Feng
RF
Department of Orthopedics, Peking Union Medical College Hospital, Peking Union Medical College, Beijing 100730, China.
Wang
Yi-Peng
YP
Qiu
Gui-Xing
GX
Zhang
Jian-Guo
JG
Wu
Zhi-Hong
ZH
Yan
Jia-Zhi
JZ
Fei
Qi
Q
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures; D016059:Range of Motion, Articular; D012600:Scoliosis / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult