Veterinary Specialists Scotland, part of Linnaeus veterinary limited, Livingston, EH54 8AG, United Kingdom.
Anderson Moores Veterinary Specialists, part of Linnaeus veterinary limited, Hampshire, S021 2LL, United Kingdom.
BMC Vet Res. 2023 Aug 2;19(1):104. doi: 10.1186/s12917-023-03660-x.
The objective of this study was to investigate the effects of locking plugs and the biomechanical properties of a 3.5 mm 8-hole polyaxial locking plate in a fracture gap model. Our hypothesis was that locking plugs would increase the strength and stiffness of the construct. Twelve 3.5 mm 8-hole plates were used to evaluate two different construct designs (with locking plugs vs. without locking plugs) with validated bone substitutes in a 25 mm bridging osteosynthesis gap model. Each construct was subjected to a single cycle four-point bending load to failure using a servo-hydraulic testing machine. Bending stiffness, bending strength, and bending structural stiffness were calculated and compared using an unpaired Student´s t-test.
The plating construct with locking plugs did not show any significant increase in terms of bending stiffness, bending strength, and bending structural stiffness compared to plating construct without locking plugs in a 25 mm gap fracture model during a single cycle four-point bending.
Under the conditions tested, filling empty plate holes with locking plugs in bridging osteosynthesis does not increase stiffness or strength of the plate-bone construct.
本研究旨在探讨锁定塞在骨折间隙模型中对 3.5mm8 孔多轴锁定板的生物力学性能的影响。我们的假设是锁定塞会增加结构的强度和刚性。使用 12 个 3.5mm8 孔板评估两种不同的构建设计（带锁定塞与不带锁定塞），在 25mm 桥接接骨术间隙模型中使用经过验证的骨替代物。每个构建物都使用伺服液压试验机进行单次循环四点弯曲破坏试验。使用配对学生 t 检验计算和比较弯曲刚度、弯曲强度和弯曲结构刚度。
在 25mm 间隙骨折模型中单循环四点弯曲试验中，与不带锁定塞的板相比，带锁定塞的板固定物在弯曲刚度、弯曲强度和弯曲结构刚度方面没有显著增加。
在测试条件下，在桥接接骨术中用锁定塞填充空的板孔不会增加板-骨结构的刚度或强度。
