Influence of Age on Mechanical Properties of Healing Fractures and Intact Bones in Rats

Effects of Salmon Calcitonin on Mechanical Properties of Healing and Intact Bone and Skin in Rats

“…Within 8 h, the healing fractures and the intact bones were tested in torsion until failure, as previously described (Engemter et al 1978, Ekeland et al 1981a). The strength, stiffness and deformation of the bones were defined as the ultimate torsional moment, the torsional stiffness and the ultimate torsional angle, respectively, and obtained from the load-deformation curves (Ekeland et al 1981a(Ekeland et al , 1982. For healing fractures, also the torsional moment required to twist the bones 20" (0.35 rad) was read from the curves, as this torsional moment has proved to be a functional and reliable measure for the degree of fracture repair in rats (Ekeland et al 1982).…”

Fracture Healing After Rigid Intramedullary Nailing in Rats

“…Ekeland et al (1982) found in adult rats fracture healing as measured mechanically to be completed in about 12 weeks. This healing pattern corresponds to the one revealed in our study, supporting the view that the arrest in a primarily normal development of strength and deflection at about 8 weeks is caused by the presence of the rigid nail.…”

Mechanical effects of intramedullary acrylic cement on fracture healing in rats

“…The operation was then concluded by closing the wound. After the operation a closed transverse fracture of the midshaft of the femur was performed in all animals by the use of a special forceps, as described by Ekeland et al (1982). The fractured limbs were not immobilized.…”