Sinan Yılar1, Mete Zeynal2, Serdar Toy3, Mehmet Köse1, Ahmet Köse4

1Department of Orthopedics and Traumatology, Medical Faculty of Atatürk University, Erzurum, Turkey
2Department of Neurosurgery, Medical Faculty of Atatürk University, Erzurum, Turkey
3Department of Orthopedics and Traumatology, Ağrı State Hospital, Ağrı, Turkey
4Department of Orthopedics and Traumatology, Health Sciences University, Regional Training and Research Hospital, Erzurum, Turkey

Keywords: Adolescence, adolescent kyphosis, pedicle screws, Scheuermann’s kyphosis, scoliosis


Objectives: This study aims to investigate if use of cannulated pedicle screw (CPS) in the dysplastic pedicles in Scheuermann’s kyphosis (SK) increases the accuracy rate of the screw and reduces screw-related complications.

Patients and methods: This retrospective study included 21 patients (11 males, 10 females; mean age 19.1 years; range, 13 to 22 years) (550 screws) who received correction with pedicle screws due to SK deformity between May 2015 and January 2019. Between 2017 and 2018, classical pedicle screws were used in addition to CPSs in the upper thoracic region (T2, T3, T4) and thin pedicles (group 1). However, during the years 2015 to 2016, only classical pedicle screws were used for the patients who underwent posterior instrumentation for SK (group 2). Computed tomography scanning was used to investigate the accuracy of the screws.

Results: There were 12 patients (316 screws) in group 1 and nine patients (234 screws) in group 2. Seventy-four (13.4%) of all screws were inserted incorrectly. Incorrect screw rate in group 1 was significantly lower than group 2; 21 (6.6%) and 53 (22.6%), respectively (p<0.001). There were no complications related to the use of CPSs after a mean follow-up of two-and-a-half years.

Conclusion: The use of CPS in the surgical treatment of SK does not increase the complication rate; instead it increases the accuracy of the screw. For this reason, we believe that CPS may be an effective and reliable option in the treatment of SK.

Citation: Yılar S, Zeynal M, Toy S, Köse M, Köse A. Comparison of the accuracy of the cannulated pedicle screw and the classical pedicle screw in the treatment of Scheuermann’s kyphosis: A retrospective study. Jt Dis Relat Surg 2020;31(2):201-208.

Conflict of Interest

The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.

Financial Disclosure

The authors received no financial support for the research and/or authorship of this article.