Iselin Lukas D, Ramawat Sunil, Hanratty Brian, Klammer Georg, Stavrou Peter
From the University Hospital Basel, Department of Traumatology, Basel, Switzerland (LDI); Adelaide Orthosports Clinic, Adelaide, SA, Australia (LDI, SR, BH, PS); Departement of Orthopaedics & Trauma, Luzerner Kantonsspitäler, Luzern, Switzerland (GK).
Medicine (Baltimore). 2015 May;94(18):e756. doi: 10.1097/MD.0000000000000756.
We wanted to verify our clinical experience that the 5.5 mm screw was ideal in the majority of fifth metatarsal fracture fixation. The size of a screw is important for the successful surgical treatment of these fractures in order to obtain the maximal stability while reducing the risk for iatrogenic fracture.A sample of patients undergoing computer tomographic imaging of the foot for investigation other than fifth metatarsal pathology were recruited. The parameters of the fifth metatarsal bone anatomy were measured.These parameters of the 5.5 mm screw were correlated with this data. The upper parameter (the diameter of the threads) was 5.5 and the lower parameter (the diameter of the shank) was 4.0 mm.Twenty seven patients were recruited.The proximal third internal diameter ranged from 3.6 to 7.0 mm with a mean of 5.0 mm. 93% of the metatarsals could easily accommodate the 5.5 mm screw. Two of the metatarsals had an internal diameter of < 4 mm (7%).It is our belief that the 5.5 mm screw may be used safely in the majority of patients with fifth metatarsal fractures.
我们想要验证我们的临床经验，即5.5毫米的螺钉在大多数第五跖骨骨折固定中是理想的。螺钉的尺寸对于这些骨折的成功手术治疗很重要，以便在降低医源性骨折风险的同时获得最大稳定性。招募了一组因除第五跖骨病变以外的其他原因接受足部计算机断层扫描成像检查的患者。测量了第五跖骨的解剖参数。将5.5毫米螺钉的这些参数与该数据进行关联。上部参数（螺纹直径）为5.5，下部参数（杆部直径）为4.0毫米。招募了27名患者。近端三分之一的内径范围为3.6至7.0毫米，平均为5.0毫米。93%的跖骨能够轻松容纳5.5毫米的螺钉。两根跖骨的内径<4毫米（7%）。我们认为，5.5毫米的螺钉可安全用于大多数第五跖骨骨折患者。
