Surgical Treatment of a Saggital Intraarticular Femoral Head Fracture with Coxofemoral Dislocation in Two Mature Dogs

The surgical treatment of two cases of craniodorsal hip luxation with an associated saggital intraarticular fracture through the femoral head is described. The method of repair consisted of an open reduction via a craniolateral approach to the hip joint and internal fixation of the fracture with a lag screw and a Kirschner wire. One case was complicated by an ipsilateral complex femoral fracture and contralateral luxation of the hip joint with avulsion of a small bone fragment from the femoral head. Both dogs were clinically sound ten to twelve months after surgery

Raman scattering investigation of ferroelastic Sb5O7I crystals

Sb5O7I undergoes a displacive phase transition at 481 K where the symmetry is changed fromC 6h 2 toC 2h 5 . In the low temperature monoclinic phase the crystal is ferroelastic. The polarized Raman spectra of Sb5O7I have been measured at various temperatures below and above the phase transition. The frequencies and symmetries of most of the theoretically expected Raman active phonons in the ferroelastic phase have been determined. The observation of a soft mode in the ferroelastic phase which disappears above the phase transition together with the fact that the unit cell of the ferroelastic phase is twice as large as that of the paraelastic structure permits the conclusion that the phase transition results from a phonon instability at the Brillouin zone boundaryM-point of the hexagonal phase. The temperature dependent splittings and intensity changes of several Raman lines are discussed with respect to the ferroelastic property of the crystal and the phase transition