Efficiency of Long Lateral Mass Screw in Posterior Cervical Fusion.

Autor:	Watanabe S; Orthopaedics, Kawasaki Medical School, Okayama, JPN., Nakanishi K; Orthopaedics, Kawasaki Medical School, Okayama, JPN., Uchino K; Orthopaedics, Kawasaki Medical School, Okayama, JPN., Iba H; Orthopaedics, Kawasaki Medical School, Okayama, JPN., Sugimoto Y; Orthopaedics, Kawasaki Medical School, Okayama, JPN., Mitani S; Orthopaedics, Kawasaki Medical School, Okayama, JPN.
Jazyk:	angličtina
Zdroj:	Cureus [Cureus] 2024 Jul 22; Vol. 16 (7), pp. e65139. Date of Electronic Publication: 2024 Jul 22 (Print Publication: 2024).
DOI:	10.7759/cureus.65139
Abstrakt:	Introduction: Long lateral mass screw (LLMS) technique for posterior cervical fusion has been performed in our hospital since 2019. In this study, the LLMS insertion technique, deviation rate, and insertion torque have been described. Moreover, several major concerns associated with LLMS have been adequately addressed. Methods: This study included 58 patients (43 men and 15 women) who had undergone LLMS surgery at our hospital during the four-year period from December 2019 to December 2023, and were evaluated using postoperative CT. The evaluation parameters included the screw length at each vertebral segment, screw angle in the sagittal section, distance between the screw heads, and complications. Results: The median screw length at C3 was 23.0 mm (22.0-24.0 mm), the screw angle was 36.1° (31.6-41.8°), and the distance between screw heads was 13.8 mm (11.6-17.2 mm). The median screw length at C4 was 22.0 mm (21.0-24.0 mm), the screw angle was 36.2° (28.7-40.7°), and the distance between screw heads was 15.9 mm (13.0-19.0 mm). The median screw length at C5 was 21.0 mm (20.0-22.0 mm), the screw angle was 35.6° (28.0-39.7°), and the distance between screw heads was 17.6 mm (15.1-20.4 mm). The median screw length for C6 was 20.0 mm (19.0-22.0 mm), the screw angle was 29.2° (25.2-36.8°), and the distance between screw heads was 20.4 mm (16.1-24.4 mm). Conclusion: The major limitations of the LLMS technique were inadequate screw angle, difficulty inserting long screws, inadequate decompression, and the inability to perform cervical laminoplasty. However, these limitations did not substantially affect the efficiency of LLMS. LLMS has fewer complications and can insert longer screws than LMS. Competing Interests: Human subjects: Consent was obtained or waived by all participants in this study. Ethics Review Committee of Kawasaki Medical School issued approval 3782. Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work. (Copyright © 2024, Watanabe et al.)
Databáze:	MEDLINE
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