{"title":"3D打印羟基磷灰石促进大鼠负重缺陷骨向内生长","authors":"Juhi Chakraborty, Subhadeep Roy, Sourabh Ghosh","doi":"10.1088/1748-605X/ac6471","DOIUrl":null,"url":null,"abstract":"3D porous hydroxyapatite (HAP) scaffolds produced by conventional foaming processes have limited control over the scaffold’s pore size, geometry, and pore interconnectivity. In addition, random internal pore architecture often results in limited clinical success. Imitating the intricate 3D architecture and the functional dynamics of skeletal deformations is a difficult task, highlighting the necessity for a custom-made, on-demand tissue replacement, for which 3D printing is a potential solution. To combat these problems, here we report the ability of 3D printed HAP scaffolds for in vivo bone regeneration in a rat tibial defect model. Rapid prototyping using the direct-write technique to fabricate 25 mm2 HAP scaffolds were employed for precise control over geometry (both external and internal) and scaffold chemistry. Bone ingrowth was determined using histomorphometry and a novel micro-computed tomography (micro-CT) image analysis. Substantial bone ingrowth was observed in implants that filled the defect site. Further validating this quantitatively by micro-CT, the Bone mineral density (BMD) of the implant at the defect site was 1024 mgHA ccm−1, which was approximately 61.5% more than the BMD found with the sham control at the defect site. In addition, no evident immunoinflammatory response was observed in the hematoxylin and eosin micrographs. Interestingly, the present study showed a positive correlation with the outcomes obtained in our previous in vitro study. Overall, the results suggest that 3D printed HAP scaffolds developed in this study offer a suitable matrix for rendering patient-specific and defect-specific bone formation and warrant further testing for clinical application.","PeriodicalId":9016,"journal":{"name":"Biomedical materials","volume":" ","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2022-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"3D printed hydroxyapatite promotes congruent bone ingrowth in rat load bearing defects\",\"authors\":\"Juhi Chakraborty, Subhadeep Roy, Sourabh Ghosh\",\"doi\":\"10.1088/1748-605X/ac6471\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"3D porous hydroxyapatite (HAP) scaffolds produced by conventional foaming processes have limited control over the scaffold’s pore size, geometry, and pore interconnectivity. In addition, random internal pore architecture often results in limited clinical success. Imitating the intricate 3D architecture and the functional dynamics of skeletal deformations is a difficult task, highlighting the necessity for a custom-made, on-demand tissue replacement, for which 3D printing is a potential solution. To combat these problems, here we report the ability of 3D printed HAP scaffolds for in vivo bone regeneration in a rat tibial defect model. Rapid prototyping using the direct-write technique to fabricate 25 mm2 HAP scaffolds were employed for precise control over geometry (both external and internal) and scaffold chemistry. Bone ingrowth was determined using histomorphometry and a novel micro-computed tomography (micro-CT) image analysis. Substantial bone ingrowth was observed in implants that filled the defect site. Further validating this quantitatively by micro-CT, the Bone mineral density (BMD) of the implant at the defect site was 1024 mgHA ccm−1, which was approximately 61.5% more than the BMD found with the sham control at the defect site. In addition, no evident immunoinflammatory response was observed in the hematoxylin and eosin micrographs. Interestingly, the present study showed a positive correlation with the outcomes obtained in our previous in vitro study. Overall, the results suggest that 3D printed HAP scaffolds developed in this study offer a suitable matrix for rendering patient-specific and defect-specific bone formation and warrant further testing for clinical application.\",\"PeriodicalId\":9016,\"journal\":{\"name\":\"Biomedical materials\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2022-04-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biomedical materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1088/1748-605X/ac6471\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, BIOMEDICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomedical materials","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1088/1748-605X/ac6471","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, BIOMEDICAL","Score":null,"Total":0}
3D printed hydroxyapatite promotes congruent bone ingrowth in rat load bearing defects
3D porous hydroxyapatite (HAP) scaffolds produced by conventional foaming processes have limited control over the scaffold’s pore size, geometry, and pore interconnectivity. In addition, random internal pore architecture often results in limited clinical success. Imitating the intricate 3D architecture and the functional dynamics of skeletal deformations is a difficult task, highlighting the necessity for a custom-made, on-demand tissue replacement, for which 3D printing is a potential solution. To combat these problems, here we report the ability of 3D printed HAP scaffolds for in vivo bone regeneration in a rat tibial defect model. Rapid prototyping using the direct-write technique to fabricate 25 mm2 HAP scaffolds were employed for precise control over geometry (both external and internal) and scaffold chemistry. Bone ingrowth was determined using histomorphometry and a novel micro-computed tomography (micro-CT) image analysis. Substantial bone ingrowth was observed in implants that filled the defect site. Further validating this quantitatively by micro-CT, the Bone mineral density (BMD) of the implant at the defect site was 1024 mgHA ccm−1, which was approximately 61.5% more than the BMD found with the sham control at the defect site. In addition, no evident immunoinflammatory response was observed in the hematoxylin and eosin micrographs. Interestingly, the present study showed a positive correlation with the outcomes obtained in our previous in vitro study. Overall, the results suggest that 3D printed HAP scaffolds developed in this study offer a suitable matrix for rendering patient-specific and defect-specific bone formation and warrant further testing for clinical application.
期刊介绍:
The goal of the journal is to publish original research findings and critical reviews that contribute to our knowledge about the composition, properties, and performance of materials for all applications relevant to human healthcare.
Typical areas of interest include (but are not limited to):
-Synthesis/characterization of biomedical materials-
Nature-inspired synthesis/biomineralization of biomedical materials-
In vitro/in vivo performance of biomedical materials-
Biofabrication technologies/applications: 3D bioprinting, bioink development, bioassembly & biopatterning-
Microfluidic systems (including disease models): fabrication, testing & translational applications-
Tissue engineering/regenerative medicine-
Interaction of molecules/cells with materials-
Effects of biomaterials on stem cell behaviour-
Growth factors/genes/cells incorporated into biomedical materials-
Biophysical cues/biocompatibility pathways in biomedical materials performance-
Clinical applications of biomedical materials for cell therapies in disease (cancer etc)-
Nanomedicine, nanotoxicology and nanopathology-
Pharmacokinetic considerations in drug delivery systems-
Risks of contrast media in imaging systems-
Biosafety aspects of gene delivery agents-
Preclinical and clinical performance of implantable biomedical materials-
Translational and regulatory matters