中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (19): 3027-3032.doi: 10.3969/j.issn.2095-4344.0793

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

新型可吸收螺钉与传统螺钉固定Lauge-Hansen 1型内踝骨折的三维有限元分析

陈帆成,禹宝庆,施继飞,敖荣广,张 旭,李得见,钱 治   

  1. 上海市浦东医院骨科,上海市 201399
  • 出版日期:2018-07-08 发布日期:2018-07-08
  • 通讯作者: 禹宝庆,博士,主任医师,上海市浦东医院骨科,上海市 201399 施继飞,主任医师,上海市浦东医院骨科,上海市 201399
  • 作者简介:陈帆成,男,1991 年生,浙江省温州市人,汉族,复旦大学上海医学院在读硕士,主要从事骨创伤方面的研究。
  • 基金资助:

    上海市卫计委资助项目(201440062,ZK2015B17)

Three-dimensional finite element analysis on the novel absorbable screw and traditional screw for fixing Lange-Hansen type 1 medial malleolus fracture  

Chen Fan-cheng, Yu Bao-qing, Shi Ji-fei, Ao Rong-guang, Zhang Xu, Li De-jian, Qian Zhi   

  1. Department of Orthopedics, Shanghai Pudong Hospital, Shanghai 201399, China
  • Online:2018-07-08 Published:2018-07-08
  • Contact: Yu Bao-qing, M.D., Chief physician, Department of Orthopedics, Shanghai Pudong Hospital, Shanghai 201399, China Shi Ji-fei, Chief physician, Department of Orthopedics, Shanghai Pudong Hospital, Shanghai 201399, China
  • About author:Chen Fan-cheng, Master candidate, Department of Orthopedics, Shanghai Pudong Hospital, Shanghai 201399, China
  • Supported by:

    a grant from the Health and Family Planning Commission of Shanghai City, No. 201440062, ZK2015B17

摘要:

文章快速阅读:

 
 

 

文题释义:
可吸收螺钉:一类用聚L-乳酸等可被人体吸收降解的材料作为原料制备而成的骨科手术螺纹钉。骨折愈合前,此类螺钉在体内可起到支撑固定的作用。经过半年到1年的时间后,螺钉又可被机体完全吸收而避免二次手术。可吸收生物材料骨钉的弹性模量更接近人体骨骼的弹性模量,使得所置入的螺钉能更好地拟合骨折断端的活动,促进骨折的愈合。
生物可吸收材料:随着生物可吸收材料在临床上运用的逐渐广泛,其优势也愈加凸显,诸如无需二次手术取出,生物相容性强,组织反应少,置于体内时不影响MRI等受金属影响的操作。
 
摘要
背景:聚L-乳酸等一类材料作为新型生物材料用于骨科领域,具有组织相容性好,可被组织吸收,无需二次手术,不与周围组织发生反应,而且可吸收材料的弹性模量接近骨骼,更有利于骨折愈合。然而目前的文献中尚未对可吸收螺钉的生物力学方面做较为充足的阐述。
目的:利用现代计算机有限元分析技术探究新型可吸收螺钉用于固定Lauge-Hansen 1型内踝骨折固定的可行性。
方法:利用CT原始数据建立简单内踝骨折模型,利用新型可吸收螺钉、新型金属螺钉以及传统金属螺钉进行固定,并导入有限元分析软件计算分析应力集中以及位移。
结果与结论:①新型可吸收螺钉固定模型共有36 240个单元,7 660个节点,450 N压力下,螺钉最大应力为46.78  MPa,螺钉最大位移为0.239 mm,骨折远端最大位移0.248 mm;②新型金属螺钉固定模型共有36 240个单元,7 660个节点,450 N压力下,螺钉最大应力为 46.49 MPa,螺钉最大位移为0.223 mm,骨折远端最大位移 0.214 mm;③传统金属螺钉固定模型共有41 236个单元,8 121个节点,450 N压力下,螺钉最大应力为59.08 MPa,螺钉最大位移为 0.182 mm,骨折远端最大位移0.207 mm;④新型可吸收螺钉用于Lauge-Hansen 1型内踝骨折的固定中,应力总体分布均匀,发生断钉可能性小;⑤实验验证了可吸收螺钉用于简单内踝骨折的生物力学可行性。对于临床医生而言,选择新型可吸收螺钉固定治疗Lauge-Hansen 1型内踝骨折是一个行之有效的选择。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID: 0000-0001-8889-4544(陈帆成)

关键词: 有限元分析, 可吸收螺钉, 胫距关节, 应力, 位移, 骨科植入物, 数字化骨科

Abstract:

BACKGROUND: Poly L-lactic acid, as a novel biological material, has been used in the field of orthopedics with good histocompatibility. Poly L-lactic acid can be absorbed by tissue, without secondary surgery, and do not react with the surrounding tissue. The elastic modulus of the absorbable material is close to the bone, which is more beneficial to the healing of the fracture. However, biomechanical aspects of absorbable screws have not been adequately described in the present literature.

OBJECTIVE: To investigate the feasibility of novel absorbable screw fixation in repair of Lauge-Hansen type 1 medial malleolus fractures using three-dimensional finite element technology.
METHODS: A Lange-Hansen type 1 medial malleolus fracture models were established by using the CT scan data, and fixed by the novel absorbable screws, novel metal screws and traditional metal screw. Finite element analysis software was used to get the stress value and displacement.
RESULTS AND CONCLUSION: (1) There were totally 36 240 units, 7 660 nodes in the novel absorbable screw fixation model under 450 N force; the maximum stress of screws was 46.78 MPa; the maximum displacement was 0.239 mm; the maximum displacement of the distal fracture was 0.248 mm. (2) There were totally 36 240 units, 7 660 nodes under 450 N force in the novel type metal screws fixation model; the maximum stress of screws was 46.49 MPa; the maximum displacement was 0.223 mm; the maximum displacement of the distal fracture was 0.214 mm. (3) There were totally 41 236 units, 8 121 nodes under 450 N force in the traditional metal screws fixation model; the maximum stress of screws was 59.08 MPa; the maximum displacement was 0.182 mm; the maximum displacement of the distal fracture was 0.207 mm. (4) The novel absorbable screws used in Lange-Hansen type 1 medial malleolus fracture obtained uniform total stress distribution, and small possibility of screw breakage. (5) The experiment verifies the biomechanical feasibility of absorbable screws for simple medial malleolus fracture. For Lange-Hansen type 1 medial malleolus fracture, novel absorbable screw is an alternative choice for clinical doctors.

 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Finite Element Analysis, Biomechanics, Ankle, Fractures, Bone, Stress, Mechanical, Tissue Engineering

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