背景:在成本方面,一点固定优于两点固定和三点固定在最小移位的韧带腋窝复合体(ZMC)骨折中,侵入性,吓人,伤口数量,和操作时间。因此,本研究旨在预测哪一种单点固定在治疗最小移位ZMC骨折中最稳定。
方法:这项研究模拟了在骨折复位和施加在骨折区域上的所有力后,在三种ZMC模型上的不同单点固定入路。研究结果被表示为对ZMC断裂和电镀系统以及碎片间微运动的应力影响。
结果:von未达到the骨前骨的钢板应力,眶下边缘,和合子腋窝支撑模型分别为(66.508、1.285和1.16MPa)。当螺丝\'von错过了眶下边缘时,zygomaticofer,和合子腋窝支撑模型分别为(13.8、4.05和1.60MPa)。然而,zygomaticofer的最大原理应力,合子腋窝支撑,和眶下边缘模型分别为(37.03,37.01和34.46MPa)。此外,合子腋窝支撑的片段间微动,轨道下边缘,和平均额叶模型分别为(0.26、0.25和0.15mm)。
结论:合子腋窝支撑处的一点固定是首选点,因为它暴露于低应力下,并且碎片间微动在与指示刚性固定的相同固定方向上的元素的批准限制内。此外,它不那么明显,没有疤痕。
背景:临床试验.gov(NCT05819372),时间为2023年4月19日。
One-point fixation was superior to the two and three-points fixation in minimally displaced zygomaticomaxillary complex (ZMC) fracture regarding the cost, invasiveness, scaring, number of wounds, and operation time. Accordingly, this study aimed to predict which one-point fixation is the most stable in managing minimally displaced ZMC fracture.
This study simulated the different one-point fixation approaches on three ZMC models after fracture reduction and application of all forces exerted on the fractured area. The findings were represented as stress impact on the ZMC fracture and plating system as well as the inter-fragments micro-motion.
The von misses stresses of plates for the zygomaticofrontal, infra-orbital rim, and zygomaticomaxillary buttress model were (66.508, 1.285, and1.16 MPa) respectively. While the screws\' von misses for the infraorbital rim, zygomaticofrontal, and zygomaticomaxillary buttress models were (13.8, 4.05, and 1.60 MPa) respectively. Whereas, the maximum principles stress at zygomaticofrontal, zygomaticomaxillary buttress, and infraorbital rim models were (37.03, 37.01, and 34.46 MPa) respectively. In addition, the inter-fragment micro-motion for zygomaticomaxillary buttress, infraorbital rim, and zygomaticofrontal models were (0.26, 0.25, and 0.15 mm) respectively.
One-point fixation at zygomaticomaxillary buttress is the preferred point because it is exposed to low stresses, and the inter-fragment micro-motion is within the approved limit with the elements in the same direction of fixation which indicates the rigid fixation. In addition, it is less palpable and scarless.
clinical trial.gov (NCT05819372) at 19/04/2023.