Contrallable micromotion cross-locking intramedullary nail
A technology of intramedullary nailing and interlocking, applied in the field of intramedullary bone-synthesizing devices and micro-motion interlocking intramedullary nails, can solve the problems of unfavorable callus formation, failure to meet fracture stress stimulation gradually strengthened, and weakening of physiological stress stimulation, etc. To achieve the effect of improving healing effect, enhancing healing effect, promoting reconstruction and healing
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example 1
[0022] This embodiment is a specific embodiment in which a degradable bioactive material 5 (Ruibang Gutai) is provided in the locking nail hole 3 at the distal end of the intramedullary nail. see figure 1 and figure 2 and combine image 3 The outer structure and shape of the entire intramedullary nail, the guide pin hole 1 set at the axis, the tail nail hole 2 set at the tail and the proximal locking nail hole 4 are the same as those of the known intramedullary nails. The structure of the locking nail holes 3 at the two ends has been improved. The distal locking nail holes 3 are all waist-shaped long holes, and the holes are filled with degradable bioactive materials 5 (Ruibang Gutai), and the degradable bioactive materials are reserved for interspersed locking nails during installation. Hole 6. The reserved hole 6 for inserting the locking nail can be made by the following two methods: 1. First, expand the hole 1 of the guide pin hole 1 at the distal end of the intramedu...
example 2
[0026] This embodiment is a specific embodiment in which a degradable bioactive material 5 (hydroxyapatite) is provided in the locking nail hole 4 at the proximal end of the intramedullary nail. See Figure 4 and Figure 5 and combine Image 6, in order to make the biodegradable bioactive material 5 tightly combined with the intramedullary nail body, so that it will not be separated due to the movement of the limb of the fractured person, in this example, the proximal locking nail hole 4 is processed into a waist-shaped long hole, and the hole wall faces the intramedullary The inner body of the nail expands into an arc shape, so that the degradable bioactive material 5 injected therein forms a flat drum shape. In order to further improve the reliability of the combination of the degradable bioactive material 5 and the intramedullary nail body, the guide pin hole 1 at the proximal end of the intramedullary nail is expanded by 3 mm in the radial direction of the intramedullary n...
example 3
[0028] This embodiment is a specific embodiment in which both the distal locking nail hole 3 and the proximal locking nail hole 4 of the intramedullary nail are provided with a degradable bioactive material 5 (polylactic acid). see Figure 7 and Figure 8 , the structural shape of the proximal locking nail hole 4 and the distal locking nail hole 3 and the manufacturing method of the reserved hole 6 are the same as in Example 2, the difference is that the distal locking nail hole 3 and the proximal locking nail hole 4 places The diameter of the guide pin hole 1 does not expand into the intramedullary nail body. Other preparation methods can be implemented with reference to Example 1. The mechanism of the technical solution described in this embodiment providing stress stimulation to the fracture and the technical effect it can achieve can be easily understood by the public by using the known biomechanical principles in conjunction with the accompanying drawings.
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