지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 815 - 822 (8page)
이용수
초록· 키워드
오류제보하기
Study Design: Prospective analysis of collected data. Purpose: We determine the need for the use of mid-length pedicle screws (screws with 2.5-mm long increments) during posterior spinal instrumentation. Overview of Literature: Many biomechanical studies have been performed showing that increasing the pedicle screw insertion depth provides an improved resistance to pullout, cyclic loading, and derotational forces, but no intermediate length screws were used. Methods: We prospectively evaluated 120 patients who received posterior segmental instrumentation for structural scoliosis. Preoperatively, 91.44-cm long cassette anteroposterior (AP), lateral, and AP bending radiographs and multiplanar computed tomography were performed in all patients routinely. We measured chord length to determine the maximum probable screw length of all vertebrae. All pedicle screws were attempted to be placed as long as possible. The main intention was at least to engage the subcortical bone of the anterior vertebral cortex. Especially in the apical region, the screws were attempted to be inserted bicortically. The length, level, region, and side of each screw were recorded. Screws with 5-mm increments were called standard length screws (SLS), and middle-sized screws with 2.5-mm increments were called mid-length screws (MLS). Results: Of 2,846 pedicle screws inserted, 1,575 (55.4%) were SLS and 1,271 (44.6%) were MLS, demonstrating a need for MLS in scoliosis surgery (p<0.05). The need for MLS increased significantly in the thoracic region, apical vertebrae, and convex side (p<0.05). Conclusions: If anterior cortex engagement or longer placement of pedicle screws is intended during scoliosis surgery, for safer placement, screws with 2.5-mm increments should be available in posterior instrumentation systems.
목차
등록된 정보가 없습니다.
참고문헌 (30)
참고문헌 신청
Roy-Camille R / 1986 / Plating of thoracic, thoracolumbar, and lumbar injuries with pedicle screw plates / Orthop Clin North Am 17:147~159
Dobbs MB / 2006 / Selective posterior thoracic fusions for adolescent idiopathic scoliosis : comparison of hooks versus pedicle screws / Spine(Phila Pa 1976) 31:2400~2404
Wu X / 2010 / Comparative intermediate and long-term results of pedicle screw and hook instrumentation in posterior correction and fusion of idiopathic thoracic scoliosis / J Spinal Disord Tech 23:467~473
Krag MH / 1988 / Depth of insertion of transpedicular vertebral screws into human vertebrae : effect upon screw-vertebra interface strength / J Spinal Disord 1:287~294
Zindrick MR / 1986 / A biomechanical study of intrapeduncular screw fixation in the lumbosacral spine / Clin Orthop Relat Res (203):99~112
Dobbs MB / 2006 / Selective posterior thoracic fusions for adolescent idiopathic scoliosis : comparison of hooks versus pedicle screws / Spine(Phila Pa 1976) 31:2400~2404
Wu X / 2010 / Comparative intermediate and long-term results of pedicle screw and hook instrumentation in posterior correction and fusion of idiopathic thoracic scoliosis / J Spinal Disord Tech 23:467~473
Krag MH / 1988 / Depth of insertion of transpedicular vertebral screws into human vertebrae : effect upon screw-vertebra interface strength / J Spinal Disord 1:287~294
Zindrick MR / 1986 / A biomechanical study of intrapeduncular screw fixation in the lumbosacral spine / Clin Orthop Relat Res (203):99~112
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