A novel bi-layered asymmetric membrane incorporating demineralized dentin matrix accelerates tissue healing and bone regeneration in a rat skull defect model.
Yan-Fei LiQi-Pei LuoYu-Xin YangAn-Qi LiXin-Chun ZhangPublished in: Biomaterials science (2024)
Objectives : The technique of guided bone regeneration (GBR) has been widely used in the field of reconstructive dentistry to address hard tissue deficiency. The objective of this research was to manufacture a novel bi-layered asymmetric membrane that incorporates demineralized dentin matrix (DDM), a bioactive bone replacement derived from dentin, in order to achieve both soft tissue isolation and hard tissue regeneration simultaneously. Methods : DDM particles were harvested from healthy, caries-free permanent teeth. The electrospinning technique was utilized to synthesize bi-layered DDM-loaded PLGA/PLA (DPP) membranes. We analyzed the DPP bilayer membranes' surface topography, physicochemical properties and degradation ability. Rat skull critical size defects (CSDs) were constructed to investigate in vivo bone regeneration. Results : The synthesized DPP bilayer membranes possessed suitable surface characteristics, acceptable mechanical properties, good hydrophilicity, favorable apatite forming ability and suitable degradability. Micro-computed tomography (CT) showed significantly more new bone formation in the rat skull defects implanted with the DPP bilayer membranes. Histological evaluation further revealed that the bone was more mature with denser bone trabeculae. In addition, the DPP bilayer membrane significantly promoted the expression of the OCN matrix protein in vivo . Conclusions : The DPP bilayer membranes exhibited remarkable biological safety and osteogenic activity in vivo and showed potential as a prospective candidate for GBR applications in the future.
Keyphrases
- bone regeneration
- computed tomography
- soft tissue
- oxidative stress
- stem cells
- mesenchymal stem cells
- highly efficient
- poor prognosis
- magnetic resonance imaging
- drug delivery
- positron emission tomography
- bone marrow
- dual energy
- image quality
- reduced graphene oxide
- gold nanoparticles
- single cell
- current status
- long non coding rna
- binding protein
- pet ct
- oral health
- human health
- replacement therapy