Biomechanical Study of Anterior Cervical Corpectomy and Step-cut Grafting with Bioabsorbable Screws Fixation in Cadaveric Cervical Spine Model.
From: Department of Orthopaedic Surgery, the 2nd Hospital of Xi’an Jiaotong University, PR China.
Spine
- Publish Date: Sep 2006
- ISSN: 1528-1159
- Volume: 31
- Issue: 19
- Pages: 2195-201
- Medium: Internet
- Language: English
- Citation (JAMA): Zhang Jian, He Xijing, Li Haopeng, et al. Biomechanical Study of Anterior Cervical Corpectomy and Step-cut Grafting with Bioabsorbable Screws Fixation in Cadaveric Cervical Spine Model.. Spine Sep 2006;31:2195-201
Abstract
STUDY DESIGN: An in vitro biomechanical study. OBJECTIVE: To determine the initial stability of a novel construct in a 1-level cadaveric cervical spine model by comparing it with a conventional method. SUMMARY OF BACKGROUND DATA: Lots of endeavors have been made to enhance fusion rates and reduce complications in the anterior cervical spine procedure. METHODS: There were 12 fresh human cadaveric cervical spines (C3-C7) randomly divided into 2 groups: group 1, 1-level corpectomy of C5 and step-cut grafting with bioabsorbable screw fixation (SCAS); and group 2, 1-level corpectomy of C5 and strut grafting with anterior plate fixation (SP). For each specimen, the intact underwent a flexibility test first, followed by the instrumented construct. Rotational angles of the C4-C6 segment were measured to study the immediate stability of anterior cervical corpectomy and SCAS, compared with the intact and anterior cervical corpectomy and SP. RESULTS: Both anterior cervical corpectomy with SCAS and with SP significantly (P < 0.01) decreased the motions of C4-C6 in all 6 degrees of freedom after instrumentation. Compared with anterior cervical corpectomy and SP, anterior cervical corpectomy and SCAS had higher stability (P < 0.05) in extension, and comparable stability (P > 0.05) in flexion and axial rotation, but lower stability (P
Mesh Headings (Keywords): Absorbable Implants, Adult, Biomechanics, Bone Screws, Bone Transplantation, Cadaver, Cervical Vertebrae, Humans, Joint Instability, Male, Middle Aged, Orthopedic Procedures, Spinal Fusion
Check for Full Text / PubMed Unique Identifier (PMID): 16946653
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