摘要
目的模拟建立各型Hangman骨折模型并测试其生物力学稳定性,为临床治疗提供生物力学依据。方法6具新鲜C0-4尸体标本,依次按Levine-Edwards诊断标准依次制成Ⅰ型、ⅡA型和Ⅱ型Hang-man骨折模型,在脊柱三维运动试验机上依次按照①正常;②Ⅰ型骨折;③ⅡA型骨折;④Ⅱ型骨折顺序测试其三维运动范围(ROM)(因Ⅲ型骨折在生物力学实验模型上无法准确模拟,故未列入本次实验范围)。结果自Ⅰ～Ⅱ型骨折,ROM值逐渐增大。Ⅰ型骨折组与对照组相比除旋转有显著性差异外,余均无显著性差异;ⅡA型骨折组及Ⅱ型骨折组与对照组相比均有显著性差异。ⅡA型骨折组与Ⅰ型骨折组相比除后伸无显著性差异外,余均有显著性差异,而Ⅱ型骨折组与Ⅰ型骨折组相比均有显著性差异。Ⅱ型骨折组与ⅡA型骨折组均有显著性差异。结论Hangman骨折稳定性自Ⅰ～Ⅱ型逐渐降低;Ⅰ型骨折为稳定性骨折,ⅡA型骨折稳定性强于Ⅱ型骨折,Ⅱ型为不稳定骨折。
Objective To establish simulated models for different types of Hangman’s fracture based on the diagnostic criteria established by Levine-E dwards and evaluate their biomechanical stability with an aim to provide biomech anical evidence for clinical treatment. Methods Six fresh adult human cervical s pecimens were designed to compare the three-dimensional motion stability in dif ferent types of Hangman’s fracture. They were divided into four groups: ① con trol (intact); ②type Ⅰ Hangman's fracture; ③ type ⅡA Hangman’s fracture; ④type Ⅱ Hangman’s fracture. Range of motion (ROM) was tested in the four gro ups. (Because type Ⅲ Hangman’s fracture could not be simulated in this experi ment, its ROM was not tested.) Results From type Ⅰ to type Ⅱ,the ROM became wider gradually. There were no statistically significant difference between type Ⅰ fracture group and the control group except for the ROM of rotation. Each R OM of type ⅡA and type Ⅱ fracture showed statistically significant difference from that of the control group. Type ⅡA fracture showed statistically signific ant differences compared with type Ⅰ except for the ROM of extension. And type Ⅱ fracture showed statistically significant differences from the other groups . Conclusions The three-dimensional motion stability in different types of Han gman’s fracture decreases gradually from type Ⅰ to type Ⅱ . Type Ⅰ belong s to stable fractures, type ⅡA is more stable than type Ⅱ, and type Ⅱ belong s to unstable fractures.
出处
《中华创伤骨科杂志》
CAS
CSCD
2004年第2期207-209,共3页
Chinese Journal of Orthopaedic Trauma
基金
广东省自然科学基金团队项目(20023001)
广东省重点攻关项目(99B06703G)
