Callus characteristics following intramedullary nailing with stainless steel or epoxy-carbon nails
✍ Scribed by P. Christel; A. Meunier; Y. Abols; L. Sedel; E. Morel; R. Vuichard; J. Leray
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 551 KB
- Volume
- 103
- Category
- Article
- ISSN
- 1434-3916
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✦ Synopsis
Biological mechanical improvements of osteosynthesis make intramedullary nailing an attractive alternative to bone plate fixation However, little is known about stress shielding induced by intramedullary implantation of a nail To evaluate the effect of the nail rigidity on bone healing, mid-metatarsal osteotomies were performed in sheep and fixed with either stainless steel or epoxy-carbon composite V-shaped nails Mechanical and histomorphometric features of the callus were evaluated 4 months postoperatively No statistical difference between the two groups were demonstrated for either mechanical or microstructural characteristics The presence of a fibrous membrane filling the bone/nail interface and allowing sliding micromotions of the implants and the much smaller effect of nail rigidity, as compared to bone plate after implantation, were assumed to be the main reason for this uniformity At this stage of healing, bone characteristics were more related to a nonspecific (vascular) bone remodeling phenomenon than to a stress-shielding effect.
Zusammenfassung Biologische und mechanische Fortschritte auf dem Gebiet der Osteosynthese lassen die Marknagelung zu einer attraktiven Alternative zur Plattenosteosynthese werden Es ist jedoch wenig bekannt fiber die Abschirmung des Knochens gegenuber der mechanischen Beanspruchung durch die Implantation eines Marknagels Um den Einflu 13 der Steifigkeit des Nagels auf die Knochenheilung zu uberprifen, wurden beim Schaf Metatarsalosteotomien in Schaftmitte durchgefiihrt und entweder mit einem rostfreien Stahlnagel oder mit einem Epoxy-Kohlenstoff-Nagel mit V-Profil stabilisiert Mechanische und histomorphometrische Eigenschaften des Knochens wurden 4 Monate postoperativ ermittelt. Fir beide Gruppen wurden bei den mechanischen und