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Luo W, Wang Y, Wang Z, Jiao J, Yu T, Jiang W, Li M, Zhang H, Gong X, Chao B, Liu S, Wu X, Wang J, Wu M. Advanced topology of triply periodic minimal surface structure for osteogenic improvement within orthopedic metallic screw. Mater Today Bio 2024; 27:101118. [PMID: 38975238 PMCID: PMC11225863 DOI: 10.1016/j.mtbio.2024.101118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 06/02/2024] [Accepted: 06/08/2024] [Indexed: 07/09/2024] Open
Abstract
Metallic screws are one of the most common implants in orthopedics. However, the solid design of the screw has often resulted in stress shielding and postoperative loosening, substantially impacting its long-term fixation effect after surgery. Four additive manufacturing porous structures (Fischer-Koch S, Octet, Diamond, and Double Gyroid) are now introduced into the screw to fix those issues. Upon applying the four porous structures, elastic modulus in the screw decreased about 2∼15 times to reduce the occurrence of stress shielding, and bone regeneration effect on the screw surface increased about 1∼50 times to improve bone tissue regrowing. With more bone tissue regrowing on the inner surface of porous screw, a stiffer integration between screw and bone tissue will be achieved, which improves the long-term fixation of the screw tremendously. The biofunctions of the four topologies on osteogenesis have been fully explored, which provides an advanced topology optimization scheme for the screw utilized in orthopedic fixation.
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Affiliation(s)
- Wangwang Luo
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Yang Wang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Zhonghan Wang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
- Orthopaedic Research Institute of Jilin Province, Changchun, China
| | - Jianhang Jiao
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Tong Yu
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Weibo Jiang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Mufeng Li
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Han Zhang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Xuqiang Gong
- Department of Spine Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Bo Chao
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Shixian Liu
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Xuhui Wu
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Jincheng Wang
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
| | - Minfei Wu
- Department of Orthopedics, The Second Hospital of Jilin University, Changchun, China
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Gu Z, Qiu C, Chen L, Wang X. Injectable thermosensitive hydrogel loading erythropoietin and FK506 alleviates gingival inflammation and promotes periodontal tissue regeneration. Front Bioeng Biotechnol 2024; 11:1323554. [PMID: 38239915 PMCID: PMC10794575 DOI: 10.3389/fbioe.2023.1323554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/13/2023] [Indexed: 01/22/2024] Open
Abstract
Background: Periodontitis is a chronic multifactorial inflammatory disease associated with dysbiotic plaque biofilms and characterized by progressive destruction of the tooth-supporting apparatus. Therefore, there is significant potential in the discovery of drugs that inhibit periodontal inflammatory responses and promote periodontal regeneration. Methods: In this study, we generated a periodontitis rat model to detect the effects of chitosan/β-sodium glycerophosphate (β-GP)/glycolic acid (GA) hydrogel carried Erythropoietin and FK506 (EPO-FK506-CS/β-GP/GA). A total of forty-eight male Wistar rats were used to establish the periodontitis model. Drug injection was administered every 3 days for a total of five times over a 2-week period. After a period of 2 weeks following implantation, the rats underwent anesthesia, and a section of their maxillae encompassing the maxillary first and second molars, along with the alveolar bone, was obtained. micro-CT scanning, histopathology, immunohistochemistry and reverse transcription-quantitative PCR (RT-qPCR) assays were performed. Meanwhile, ELISA assay was performed to detect the levels of inflammatory mediators (TNF-α, IL-6 and IL-1β). Results: The synthesis and characterization of EPO-FK506-CS/β-GP/GA revealed that the hydrogel has stability and sustained release of drugs. The application of FK506+EPO was found to significantly enhance new bone formation in the defect area, as evidenced by the results of HE staining. Additionally, the use of FK506+EPO in the treated groups led to a notable increase in the density of alveolar bone, as observed through micro-CT analysis, when compared to the Model group. EPO-FK506-CS/β-GP/GA hydrogel exhibited notable efficacy in modulating inflammatory mediators (TNF-α, IL-6 and IL-1β). Furthermore, the osteoinductive properties of the EPO-FK506-CS/β-GP/GA hydrogel were extensive, as evidenced by a significant upregulation in the expression of key markers (Collagen I, Runx2, OPN, and OCN) associated with osteoblastic differentiation. Conclusion: Taken together, EPO-FK506-CS/β-GP/GA hydrogel alleviates gingival inflammation and promotes periodontal tissue regeneration in the periodontitis.
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Affiliation(s)
- Zhongyi Gu
- Department of Periodontology, The Affiliated Yantai Stomatological Hospital, Binzhou Medical University, Yantai, Shandong, China
| | - Caiqing Qiu
- Department of Periodontology, The Affiliated Yantai Stomatological Hospital, Binzhou Medical University, Yantai, Shandong, China
| | - Ling Chen
- Department of Yantai University Branch, The Affiliated Yantai Stomatological Hospital, Binzhou Medical University, Yantai, Shandong, China
| | - Xiaoli Wang
- Department of Yantai University Branch, The Affiliated Yantai Stomatological Hospital, Binzhou Medical University, Yantai, Shandong, China
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