Cormier Joseph, Manoogian Sarah, Bisplinghoff Jill, Rowson Steve, Santago Anthony, McNally Craig, Duma Stefan, Bolte John
Biodynamic Research Corporation, San Antonio, TX 78249, USA.
J Biomech Eng. 2011 Jun;133(6):064501. doi: 10.1115/1.4004248.
This study reports the results of 38 infraorbital maxilla impacts performed on male cadavers. Impacts were performed using an unpadded, cylindrical impactor (3.2 kg) at velocities between 1 and 5 m/s. The peak force and acoustic emission data were used to develop a statistical relationship of fracture risk as a function of impact force. Acoustic emission sensors were used to provide a noncensored measure of the maxilla tolerance and were essential due to the increase in impactor force after fracture onset. Parametric and nonparametric techniques were used to estimate the risk of fracture tolerance. The nonparametric technique produced an estimated 50% risk of fracture between 970 and 1223 N. The results obtained from the parametric and nonparametric techniques were in good agreement. Peak force values achieved in this study were similar to those of previous work and were unaffected by impactor velocity. The results of this study suggest that an impact to the infraorbital maxilla is a load-limited event due to compromise of structural integrity.
本研究报告了对男性尸体进行的38次眶下上颌骨撞击的结果。使用未加衬垫的圆柱形撞击器（3.2千克）以1至5米/秒的速度进行撞击。峰值力和声发射数据被用于建立骨折风险与撞击力之间的统计关系。声发射传感器用于提供对上颌骨耐受性的无删失测量，并且由于骨折发生后撞击器力的增加而至关重要。参数化和非参数化技术被用于估计骨折耐受性风险。非参数化技术得出在970至1223牛之间骨折风险估计为50%。从参数化和非参数化技术获得的结果吻合良好。本研究中达到的峰值力值与先前研究的结果相似，并且不受撞击器速度的影响。本研究结果表明，由于结构完整性受损，眶下上颌骨受到的撞击是一个负荷受限事件。
