AI Article Synopsis
- The Janus membrane has a unique bilayer structure that promotes bone repair by serving dual functions: acting as a barrier and guiding bone regeneration.
- A new biodegradable Janus carboxymethyl chitin membrane, featuring an asymmetric pore structure and infused with nano-hydroxyapatites, was developed to enhance these functions without using crosslinkers.
- In experiments, this Janus membrane outperformed traditional collagen membranes in promoting new bone tissue formation and showed excellent hemostatic properties, indicating its potential for improving bone regeneration strategies.
Article Abstract
Barrier membranes with osteogenesis are desirable for promoting bone repair. Janus membrane, which has a bilayered structure with different properties on each side, could meet the osteogenesis/barrier dual functions of guided bone regeneration. In this work, new biodegradable Janus carboxymethyl chitin membrane with asymmetric pore structure was prepared based on thermosensitive carboxymethyl chitin without using any crosslinkers. Nano-hydroxyapatites were cast on single-sided membrane. The obtained carboxymethyl chitin/nano-hydroxyapatite Janus membrane showed dual biofunctions: the dense layer of the Janus membrane could act as a barrier to prevent connective tissue cells from invading the bone defects, while the porous layer (with pore size 100-200 μm) containing nano-hydroxyapatite could guide bone regeneration. After implanted on the rat critical-sized calvarial defect 8 weeks, carboxymethyl chitin/nano-hydroxyapatite membrane showed the most newly formed bone tissue with the highest bone volume/total volume ratio (10.03 ± 1.81 %, analyzed by micro CT), which was significantly better than the commercial collagen membrane GTR® (5.05 ± 0.76 %). Meanwhile, this Janus membrane possessed good hemostatic ability. These results suggest a facile strategy to construct hemostasis-osteogenesis integrated Janus carboxymethyl chitin/hydroxyapatite membrane for guided bone regeneration.
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| http://dx.doi.org/10.1016/j.carbpol.2023.120888 | DOI Listing |
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