Fully threaded headless cannulated screws provide similar biomechanical strength to conventional fixation in 3-dimensionally printed canine medial malleolar fracture models.
Youngjun Choi, Jun-Sik Cho, Younwoo Choo, Sorin Kim, Hwi-Yool Kim
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引用次数: 0
Abstract
Objective: To compare the failure load of the fully threaded headless cannulated screw (FTHCS) technique with that of fully threaded self-tapping cortical low-profile screw (FTLPS) fixation, 2 Kirschner (K) wires, and figure-of-8 tension band wire (TBW) fixation for stabilizing medial malleolar fractures using a 3-D-printed canine bone model.
Methods: This study was conducted from June 10, 2024, through February 9, 2025. A CT image of the tibia from a 2-year-old 12-kg castrated male Jindo dog was used to create 21 polycarbonate 3-D-printed bone models, and 7 were assigned to each group. The TBW group was stabilized with two 1.2-mm K-wires and figure-of-8 TBW (20 gauge), the FTLPS group was stabilized with a 3.5-mm FTLPS, and the FTHCS group was stabilized with a 3.5-mm FTHCS. Tensile load was applied at 0.2 mm/s using a universal testing machine, and failure load was recorded.
Results: The mean failure load for the TBW, FTLPS, and FTHCS groups was 238.0 ± 38.1 N, 187.3 ± 50.8 N, and 215.5 ± 35.2 N, respectively. There were no statistically significant differences among groups. All screw fixed models failed by fracture of the malleolar fragment.
Conclusions: The FTHCS fixation showed comparable failure loads to conventional fixation methods in this model. While promising, its use may be appropriate only when fragment size and bone quality are sufficient.
Clinical relevance: While failure loads and mechanisms were similar in this model, further investigation into the relative size of the screw to the fragment is necessary to guide the clinical application of this device.
目的：利用3d打印的犬骨模型，比较全螺纹无头空心螺钉（FTHCS）技术与全螺纹自攻皮质低轮廓螺钉（FTLPS）固定、2枚克氏针(K)和8字形张力带丝（TBW）固定稳定内踝骨折的失效负荷。方法：本研究于2024年6月10日至2025年2月9日进行。利用2岁、体重12公斤的雄性珍岛犬的胫骨CT图像，制作21个聚碳酸酯3d打印骨模型，每组7个。TBW组用2根1.2 mm k -丝和8字形TBW（20规）稳定，FTLPS组用3.5 mm fthps稳定，FTHCS组用3.5 mm FTHCS稳定。采用万能试验机，以0.2 mm/s的速度施加拉伸载荷，记录失效载荷。结果：TBW组、FTLPS组和FTHCS组的平均失效负荷分别为238.0±38.1 N、187.3±50.8 N和215.5±35.2 N。各组间差异无统计学意义。所有螺钉固定模型均因踝碎片骨折而失败。结论：在该模型中，FTHCS固定与传统固定方法的失效载荷相当。虽然很有前景，但只有当碎片大小和骨质量足够时，它的使用才合适。临床相关性：虽然该模型的失效载荷和机制相似，但有必要进一步研究螺钉与碎片的相对大小，以指导该装置的临床应用。
期刊介绍：
The American Journal of Veterinary Research supports the collaborative exchange of information between researchers and clinicians by publishing novel research findings that bridge the gulf between basic research and clinical practice or that help to translate laboratory research and preclinical studies to the development of clinical trials and clinical practice. The journal welcomes submission of high-quality original studies and review articles in a wide range of scientific fields, including anatomy, anesthesiology, animal welfare, behavior, epidemiology, genetics, heredity, infectious disease, molecular biology, oncology, pharmacology, pathogenic mechanisms, physiology, surgery, theriogenology, toxicology, and vaccinology. Species of interest include production animals, companion animals, equids, exotic animals, birds, reptiles, and wild and marine animals. Reports of laboratory animal studies and studies involving the use of animals as experimental models of human diseases are considered only when the study results are of demonstrable benefit to the species used in the research or to another species of veterinary interest. Other fields of interest or animals species are not necessarily excluded from consideration, but such reports must focus on novel research findings. Submitted papers must make an original and substantial contribution to the veterinary medicine knowledge base; preliminary studies are not appropriate.
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