ABSTRACT
RATIONALE AND OBJECTIVES: Thanks to the advanced studies in biomaterial engineering a panoply of polymers can be used to manufacture porous scaffolds for bone tissue regeneration. Suitability of the scaffold for its purpose is determined by factors like size of the pores, its orientation and shape, as well as biocompatibility of the material. Even though a variety of analysis methods is available for in vitro studies, investigating the process of bone reconstruction on implanted scaffold meets with difficulties. METHODS AND MATERIALS: Polylactide porous sponges imbued in hydroxyapatite were implanted into long bones of white New Zealand rabbits for 3 months. The bones obtained from the animals were subjected to MRI and µCT imaging. The obtained images were subsequently fused together. RESULTS AND CONCLUSIONS: Combined MRI and µCT resulted in high resolution diagnostic images which allow for: implant positioning, inflammation divulgement, rating degree of implant resorption, observation of newly formed trabeculae, texture analysis and other quantitative measurements.
Subject(s)
Bone Regeneration , Magnetic Resonance Imaging , Tissue Scaffolds , X-Ray Microtomography , Animals , Bone and Bones/anatomy & histology , Durapatite , Materials Testing , Polyesters , RabbitsABSTRACT
The results of treatment of varicose crural ulcers are reported in a group of 85 patients. Cure was achieved in 75 cases. The social and economic aspects of this problem are stressed.
