Biomechanics analysis of the impact of maxillofacial injury on skull base damage
10.3760/cma.j.issn.1002-0098.2016.08.009
- VernacularTitle:颌面撞击伤对颅底损伤的生物力学分析
- Author:
Po WU
1
;
Ziyang YANG
;
Yu LIU
;
Yan LI
;
Yinghui TAN
Author Information
1. 第三军医大学新桥医院口腔科
- Keywords:
Maxillofacial injuries;
Skull base;
Biomechanics;
Finite element analysis;
Impact injury
- From:
Chinese Journal of Stomatology
2016;51(8):480-485
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the impact of maxillofacial injury on skull base.Methods A three-dimensional(3D) finite-element model of cranio-maxillofacial bone was established by CT scan data.A lead cylinder in base diameter of 3 cm was designed as an impactor.There regions(upper right maxilla,left infraorbital margin and left zygomatic body) subjected to an impact at the speed of 8.6 m/s(about 30 km/h)was simulated.Thirteen landmarks at the skull base were selected.The values of stress at the end of 0.5,1.0,1.5,2.0 ms were obtained,and the results were analyzed.Results The dynamic process of the fracture of the jaw and the stress distribution and conduction of the skull base were successfully simulated in three parts of the face.When the impact was on the right maxillary bone region,the stress values of the three points(medial foramen rotundum,medial foramen rotundum,anterior clivus reached the peak at each time point,26.2,22.4,21.5 MPa(t=0.5 ms) and 70.0,55.0,45.0 MPa(t=1.0 ms) and 38.0,26.5,39.5 MPa(t=1.5 ms) and26.0,19.0,23.0 MPa(t=2.0 ms),respectively.When the impact was on the left margo infraorbitalis orbitaeta region,the stress values of the two points(medial left foramen rotundum,posterior clivus) reached the peak at each time point,8.8,16.0 MPa(t=0.5 ms) and 10.0,18.0 MPa(t=1.0 ms) and 5.5,6.0 MPa(t=1.5 ms) and11.5,12.5 MPa(t=2.0 ms),respectively.When the impact was on the body of left zygomatic bone,the stressvalues of posterior clivus were 45.0 MPa(t=0.5 ms),40.0 MPa(t=1.0 ms),12.0 MPa(t=1.5 ms),42.5 MPa(t=2.0 ms),respectively.Conclusions According to the difference of stress distribution and conduction of maxillofacial and skull base bone,the speed and the path of force transfer to the skull base were different.Finite-element dynamic simulation can be used for the biomechanics research on maxillofacial trauma.
