Biomechanical property of tension band plate in the treatment of unstable pelvic fracture
10.3969/j.issn.2095-4344.2017.11.017
- VernacularTitle:张力带钢板治疗不稳定骨盆骨折的生物力学性能评价
- Author:
Qi WANG
- From:
Chinese Journal of Tissue Engineering Research
2017;21(11):1737-1741
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND: Tension band steel in unstable pelvic fractures can achieve the desired effect, but has not yet been confirmed by biomechanics.OBJECTIVE: To observe treatment effect and biomechanical property of the three kinds of tension band steel in different fixed positions of unstable pelvic fracture.METHODS: Nine adult antiseptic specimen pelvises were made into unstable pelvic injury models after completing normal pelvis detection. Depending on the position of the tension band fixation plate, these models were divided into group A, group B and group C. Group A: Plate fixation in bilateral posterior superior iliac spine, parallel to the plate ends with the pubis; group B: fixation on posterior superior iliac spine, both ends of the plate pointing forward; group C: plate below the posterior superior iliac spine, front top at both ends of the plate. Efficacy was compared among the three groups. The pelvic specimen was placed on the biomechanical testing machine. Axial stiffness and torsional stiffness were measured. Biomechanical properties of tension band plate in the treatment of unstable pelvic fracture were analyzed.RESULTS AND CONCLUSION: (1) The axial stiffness of the pelvic ring of the same specimens measuring three times was not significantly different (P > 0.05). The pelvic ring axial stiffness in order: group A > group C > group B (P < 0.05).(2) Torsional stiffness of the same specimens measuring three times was not significantly different (P > 0.05). Torsional stiffness was significantly lower in group A than in groups B and C (P < 0.05). (3) Vertical displacement of the same specimens measuring three times was not significantly different (P > 0.05). Vertical displacement in order: group B >group C > group A (P < 0.05). (4) The fixation on posterior superior iliac spine with both ends of the plate pointing forward obtained better biomechanical properties, and could be given priority by combining with pelvic fracture type.
