Implant device for promoting bone growth

Abstract

In order to promote bone growth without damage of a growth plate to improve the stability of a procedure, the present invention provides an implant device for promoting bone growth, the device comprising: a first implant bar implanted to penetrate a metaphysis corresponding to the inside of a growth plate of a long bone to be treated; a second implant bar implanted to penetrate an epiphysis of the outside of the growth plate; and a stimulation elongation means disposed close to the external surface of the long bone to be treated and installed under skin tissues surrounding the long bone to be treated, and being elongated between end portions of the implant bars to increase a gap between the implant bars to cause the growth plate to be extended.

1 . An implant device for promoting bone growth, the implant device comprising:
 a first implant bar implanted to penetrate a metaphysis corresponding to the inside of a growth plate of a long bone to be treated;   a second implant bar implanted to penetrate an epiphysis of the outside of the growth plate; and   a stimulation elongation unit located close to an external surface of the long bone to be treated and provided in skin tissues surrounding the long bone to be treated, the stimulation elongation unit being elongated between end portions of the respective implant bars to increase a distance between the first implant bar and the second implant bar to cause the growth plate to be extended.   
     
     
         2 . The implant device of  claim 1 , wherein both end portions of the first implant bar are exposed to both side portions of the long bone, and
 both end portions of the second implant bar are exposed to both side portions of the long bone.   
     
     
         3 . The implant device of  claim 1 , wherein a pair of stimulation elongation units are respectively located between one end portion of the first implant bar and one end portion of the second implant bar and between another end portion of the first implant bar and another end portion of the second implant bar. 
     
     
         4 . The implant device of  claim 1 , wherein the stimulation elongation unit comprises:
 an inner rod coupled to one-side end portions of the first implant bar and the second implant bar;   an outer rod of a hollow type coupled to another-side end portions of the first implant bar and the second implant bar, the outer rod into which the inner rod is inserted; and   an elastic member configured to elastically support between the inner rod and the outer rod such that the inner rod is withdrawn from the outer rod.   
     
     
         5 . The implant device of  claim 4 , wherein a serrated protrusion having an inclined upper portion is provided in multi-stages to protrude from an outer circumference of the inner rod, and
 a serrated groove having an inclined upper portion is formed at an inner circumference of the outer rod such that the inner rod is slid in one direction.   
     
     
         6 . The implant device of  claim 4 , wherein the elastic member includes a coil spring including a shape memory alloy material, which is elongated at a predetermined first temperature or higher and contracted at a predetermined second temperature or lower, and
 the elastic member is mounted on an outer circumference of the inner rod such that the elastic member elastically applies pressure to an engaging surface of a lower portion of the serrated protrusion when the elastic member is elongated, and is slid along an inclined surface of an upper portion of the serrated protrusion when the elastic member is contracted.   
     
     
         7 . The implant device of  claim 1 , wherein the stimulation elongation unit comprises a first elongation rod portion located between one end portions of the respective implant bars and a second elongation rod portion located between another end portions of the respective implant bars,
 wherein each of the elongation rod portions includes a round bar shape including an elastic shape memory alloy material, which is transformed to reduce a curvature of each of the elongation rod portions at a predetermined first temperature or higher.   
     
     
         8 . The implant device of  claim 7 , wherein variations in respective curvatures of the first elongation rod portion and the second elongation rod portion, which are reduced at the first temperature or higher, are set to be different from each other to correspond to a direction in which the long bone is curved.