Is there any correlation between the preoperative parameters and correction loss in patients operated for hyperkyphosis?
OBJECTIVE
Preoperative, postoperative, and latest follow-up data of sagittal balance and spinopelvic parameters of our patients treated surgically for hyperkyphosis were evaluated retrospectively, to determine whether there is any correlation between the preoperative pelvic incidence and postoperative correction loss.


METHODS
Totally 33 patients (18 females) who were operated for hyperkyphosis and, were reached at the latest follow-up were included in the study. Age at operation, gender, date of operation, etiology and level of the deformities, instrumentation, and graft types were noted in detail. The kyphosis angles were measured by the Cobb method. The preoperative and postoperative spinopelvic parameters (pelvic incidence, sacral slope, and pelvic tilt) were recorded.


RESULTS
The average follow-up was 4 years (range 3-8 years). The mean age at operation was 21 years (range 14-40 years). Scheuermann kyphosis was diagnosed as the etiological factor in 18 patients (53%). The mean preoperative kyphosis angle was 76° (range 55-98°), which decreased postoperatively to 38° (range 20-55°) (p<0.05). The mean kyphosis angle two years postoperatively was 41° (p>0.05). Preoperative and latest follow-up spinopelvic parameters were also not significantly different. Furthermore, no correlation could be found between the age at operation, instrumentation level, spinopelvic parameters, and correction loss.


CONCLUSIONS
There is no correlation between the preoperative pelvic incidence and postoperative correction loss in patients treated surgically for hyperkyphosis. Further studies with larger sample size and longer follow-up should be conducted.
Department of Orthopedics and Traumatology, İstanbul Okmeydanı Training and Research Hospital, İstanbul, Turkey. dr_mtonbul@hotmail.com
Murat
M
Tonbul
Osman
O
Orhan
Mehmet Reşat
MR
Yılmaz
Müjdat
M
Adaş
H Cihangir
HC
Yurdoğlu
Egemen
E
Altan
D000293:Adolescent; D000328:Adult; D053587:Arthrometry, Articular; D016025:Bone Transplantation / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D010384:Pelvic Bones / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D011183:Postoperative Complications / Q000175:diagnosis*; D011300:Preoperative Care; D012189:Retrospective Studies; D012447:Sacrum / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D012544:Scheuermann Disease / Q000175:diagnosis / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D012720:Severity of Illness Index; D013123:Spinal Fusion / Q000009:adverse effects*; D013131:Spine / Q000473:pathology / Q000503:physiopathology / Q000601:surgery; D016896:Treatment Outcome