Intermittent vibrations accelerate fracture healing in sheep

Abstract Purpose: To investigate the effect of intermittent vibration at different intervals on bone fracture healing and optimize the vibration interval. Methods: Ninety sheep were randomized to receive no treatment (the control group), incision only (the sham control group), internal fixation with or without metatarsal fracture (the internal fixation group), and continuous vibration in addition to internal fixation of metatarsal fracture, or intermittent vibration at 1, 2, 3, 5, 7 and 17-day interval in addition to internal fixation of metatarsal fracture (the vibration group). Vibration was done at frequency F=35 Hz, acceleration a=0.25g, 15 min each time 2 weeks after bone fracture. Bone healing was evaluated by micro-CT scan, bone microstructure and mechanical compression of finite element simulation. Results: Intermittent vibration at 7-day interval significantly improved bone fracture healing grade. However, no significant changes on microstructure parameters and mechanical properties were observed among sheep receiving vibration at different intervals. Conclusions: Clinical healing effects should be the top concern. Quantitative analyses of bone microstructure and of finite element mechanics on the process of fracture healing need to be further investigated.

Diagnostico y tratamiento de las fracturas nasales en el servicio de otorrinolaringologia del instituto de previsiòn social / Diagnosis and treatment of nasal fractures in the department of otolaryngology at the institute of social welfare

Las fracturas nasales son la fractura facial màs comùn.Son responsables de un alto porcentaje de rinoseptumplastìas.

Intra articular fractures of distal humerus in adults: evaluation of results after internal fixation

Intra articular fractures of distal humerus, because of their rarity, displacement and comminution, present a formidable problem to Orthopaedic Surgeons in their management. Fifty adult patients with intra articular fractures of distal humerus were treated by open reduction and internal fixation. Transolecranon approach was found to be satisfactory in treating such injuries. Overall results both functionally and cosmetically were good to excellent in seventy three percent of patients. A low profile of complications was encountered. For better results, exact and stable reduction and internal fixation is recommended

Osteosintesis dinamica del olecranon / Dynamic osteosynthesis of the olecranon

Las fracturas del olecranon han sido tratadas con una gran variedad de metodos incluyendo: el tratamiento de inmovilizacion con yeso, reseccion del olecranon, la reduccion abierta y fijacion con el tornillo de Leibach propuesta por De Palma y otros autores, hasta llegar a la reduccion abierta y osteosintesis dinamica propuesta por la AO, siendo esto ultimo lo realizado en el presente trabajo en 34 pacientes desde 1979, en el Hospital San Ignacio de la Universidad Javeriana. El objetivo principal fue analizar los resultados funcionales del tratamiento de las fracturas del olecranon utilizando el metodo de la osteosintesis dinamica. Los objetivos secundarios fueron: analizar mecanicamente la tecnica y comparar los resultados obtenidos con otros sistemas de tratamiento. Se analizaron los siguientes parametros el pre y postoperatorio; edad, sexo, tiempo transcurrido entre el accidente y la cirugia, tipo de la fractura, seguimiento, movilidad del codo, dolor, tiempo de inmovilizacion, tiempo de consolidacion, estabilidad, fallas tecnicas y complicaciones. En los 34 pacientes obtuvimos resultados funcionales excelentes, por lo tanto creemos que el metodo de la osteosintesis dinamica es el ideal para el tratamiento de las fracturas del olecranon, obteniendo "una movilidad del codo".