Yonghui Liang, Professor | Aerospace Center Hospital; Songyang Liu, PhD; Shen Liu ,MD; Fu Gu, MD.
Competition Sponsor: Chinese Academy of Medical Sciences
Awardee Year: 2023
With the aging of human society and the more active lifestyles of the elderly, the number of patients with pelvic fractures is rising annually. While posterior ring fixation techniques have shown significant progress as minimally invasive techniques developed, optimal method for anterior ring fixation is still controversial. The widely used INFIX system, which applies spinal screws directly to the anterior pelvic ring, has shortcomings related to mechanical requirements, application scenarios and anatomical characteristics. Our preliminary studies identified the main causes for the complications of INFIX including: 1. The thread of the screw designed for the spine is not suitable for the pelvic bone and its length is insufficient, which leads to the loosening of the screw and limits its application; 2. The integrity of the screw tail and screw is not suitable for early removal and thus limits the application of bone cement reinforcement for fragility fractures; 3. Excessive notches and straight screw design make the skin and lateral femoral nerves irritable, causing obvious local pain. To address above limitations, we designed four new type of internal fixation screw systems， each with its advantages in terms of strength and convenient operation. However, their mechanical stability and clinical applicability require further investigation. Therefore, we designed ” A Novel Anterior Pelvic Ring Fixation System for Fragile Pelvic Fracture: Development and Biomechanical Study”. We aim to identify the optimal screw fixation for the pelvic anterior ring through finite element analysis and biomechanical experiments, with the goal of enabling industrial production.