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钉道感染是骨钉贯穿固定的危险并发症。作者报告7例钉道骨髓炎,均有环形死骨。胫骨4例,尺骨2例,掌骨1例。钉放于皮质内者5例。作者回顾,由于哈佛氏管的中断以及钻孔时产生的热可引起热性骨坏死。且随高速电钻产生的高温与使用某种类型钻头范围加大。在不活动的固定钉插入之后,邻接钉子的死骨与围绕的髓质编织骨带为致密的皮质骨所代替,形成了X线上在钉道周围出现的硬化带。如果骨钉固定不紧,紧邻钉道的骨带被纤维组织,滑膜样组织与软骨细胞代替,X线上于与钉相邻的反应性硬化骨环间出现不同宽度的透亮
Spiral infection is a dangerous complication of penetrating fixation. The authors reported 7 cases of nail osteomyelitis, all of which had annular bone. There were 4 patellas, 2 ulna, and 1 metacarpal. The nails were placed in the cortex in 5 cases. The authors recall that due to the interruption of the Harvard tube and the heat generated during drilling, thermal osteonecrosis can be caused. And with the high-speed electric drill high temperature and the use of a certain type of drill range. After insertion of the inactive fixation nail, the sequestrum adjacent to the nail and the surrounding medullated woven bone belt are replaced by dense cortical bone, forming a hardened band appearing around the pinway on the X-ray. If the screw is not tightly fastened, the bony cord immediately adjacent to the screw path is replaced by fibrous tissue, and synovial tissue and cartilage cells replace it. X-rays appear translucent with different widths between the reactive hardened bony rings adjacent to the nail.