Four Cases of Multiple Epiphyseal Dysplasia in One Family / 대한정형외과학회잡지

The clinical entity of Dysplasia Epiphyseal Multiplex was first descrihed by Fairbank in 1935, characterized by the disturbance of endochondral ossification in hoth epiphyseal centers and regions of physeal growth. It manifests itself radiologically as late appearance and mottling of the ossification centers and clinically as short stature, stubby digits and painful stiffness of multiple joints. It is typically transmitted as an autosomal dominant trait though recessive forms have been described. The spine is normal apart from a mild increased lumbar lordosis. Many patients are referred to an orthopaedic surgeon for bilateral Perthes disease, as was one of the authors cases. This Paper reports four cases of multiple epiphyseal dysplasia which affected one family.

Biomechanical analysis of Korean Ilizarov Fixator / 대한정형외과학회잡지

The purpose of this study is to evaluate biomechanical stability of Korean Ilizarov fixator before clinical application. We measured the ultimate tensile load and stiffness of Ilizarov smooth wire and olive wire, bending stiffness of half-pin, ultimate compressive load and stiffness of Ilizarov ring using Instron 1331. Four types of Ilizarov assembly were tested for measuring stiffness of axial compression, anteroposterior bending, and lateral bending. There were group I fixed with only smooth wires; group II with only olive wires; group III with wires and half-pins; and group IV with only half-pins. The results of Korean Ilizarov apparatus were compared to those of American Ilizarov apparatus using unpaired t-test. The ultimate tensile strength of Korean smooth wire was greater than that of American wire. The ultimate tensile strength of Korean olive wire was lower than that of American wire. There was no significant difference of stiffness of axial compression, anteroposterior bending, and lateral bending between American and Korean apparatus. There was no significant difference of axial compression stiffness and bending stiffness between group III and group IV. In conclusion, Korean Ilizarov apparatus can be used with good stability for treatment of fracture, internal bone transport, and limb lengthening according to this biomechanical study.