[Intramedullary nailing with a Rush pin in the treatment of diaphyseal humeral fractures]. / L'inchiodamento endomidollare con infibulo di Rush nel trattamento delle fratture diafisarie di omero.

The authors discuss their 20 years of experience in the treatment of diaphyseal fractures of the humerus with Rush-type intramedullary nailing. The various operative and nonoperative methods for the treatment of this type of fracture are critically analyzed. The results were excellent in 60.5% of the cases, good in 29.6%, and poor in only 9.9%, in which healing was over 4 months late and a hypotrophic callus was present. The advantages of this treatment are as follows: adequate reduction of the fracture, simplicity of execution, good results, and shorter period of immobilization compared to other methods.

A study of the interface between human bone and hydroxylapatite. A morphological and morphometric investigation.

The results are reported of clinical experiments conducted on four volunteers suffering from fractures of the tibia. Dense hydroxylapatite screws were used in association with conventional internal fixation. On removal of the plates and screws at periods varying from 4 to 12 months after implantation, the hydroxylapatite screws were removed together with a core of surrounding bone in order to study the bone hydroxylapatite relationship. Conventional and scanning electron microscopy was used, as well as dichromatic bone mineralometric tests. The results confirmed the excellent biocompatibility of hydroxylapatite with human bone. Arising out of this, the possible future clinical application of dense hydroxylapatite is discussed.