539 - The Use of Intralaminar Screws in Patients with Spinal Deformity...

#539 The Use of Intralaminar Screws in Patients with Spinal Deformity


Poster Presented by: K.C. Kose


K.C. Kose (1)
M.E. Inanmaz (1)
H. Atmaca (1)
H. Basar (1)
C. Isik (2)
E. Bal (1)

(1) Sakarya University, Adapazari, Turkey
(2) Bolu Izzet Baysal University, Bolu, Turkey


Purpose: To demonstrate that intralaminar screws (ILS) can be used as supplements in spinal deformity surgery in the thoracic and lumbar levels in pediatric and adult patients.

Methods: Retrospective case series. All spinal deformity patients (primary/revision) operated between 2007-2011 were retrospectively reviewed. The patients with ILS were included in the study. The anteroposterior and lateral standing X-rays were evaluated in terms of preoperative and postoperative coronal and sagittal deformities. The number and level of ILS, intraoperative complications and postoperative complications were noted.

Results: There were 12 male and 8 female patients. The mean age was 21.75 years. The mean follow-up period was 17.4 months. Fifty-seven ILS were inserted (2.85 screws/patient). Seventeen screws were used in the uppermost- lowermost levels. Forty screws were used in the middle. There was one lamina fracture and screw pull out (1.75%). There were 3 canal violations (corrected intraoperative) and 2 instrument prominences which did not require implant removal. The mean preoperative/postoperative cobb angles were 78,5/27,8 and the mean preoperative/postoperative kyphosis angles were 57,2/32,5 degrees. The loss of correction was 1,2 degrees. There were no neurologic deficits and no instrument failures.

Conclusions: ILS are safe and effective when used in deformity correction. However, biomechanical studies and randomized controlled trials are needed to conclude whether ILS will be considered a first-line technique, or will remain a technique for salvage situations.