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Xiang S, Yuan Y, Zhang C, Chen J. Effects of Process Parameters on the Corrosion Resistance and Biocompatibility of Ti6Al4V Parts Fabricated by Selective Laser Melting. ACS OMEGA 2022; 7:5954-5961. [PMID: 35224356 PMCID: PMC8867574 DOI: 10.1021/acsomega.1c06246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 01/26/2022] [Indexed: 05/17/2023]
Abstract
Excellent biocompatibility and corrosion resistance of implants are essential for Ti6Al4V parts fabricated by selective laser melting (SLM) for biomedical applications. To achieve better corrosion resistance and biocompatibility of Ti6Al4V parts, the effects of SLM processing parameters on the corrosion resistance and the biocompatibility of Ti6Al4V parts are investigated by changing the scanning speeds and laser powers. The detailed influence mechanism of processing parameters on the properties of Ti6Al4V parts is studied from two aspects, including microstructure and defects. It is found that the corrosion resistance and biocompatibility of Ti6Al4V parts can be adjusted by changing the scanning speed and the laser power due to the constituent phase and the number and size of defect holes of Ti6Al4V parts. Compared with the laser power, the scanning speed has a stronger influence on the performance of the part, which can be used as "coarse tuning" based on the performance requirements. At the scanning speed of 1100 mm/s and the laser power of 280 W, Ti6Al4V parts with better corrosion resistance can be obtained. Ti6Al4V parts with better biocompatibility are fabricated at the scanning speed of 1200 mm/s and the laser power of 200 W.
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Affiliation(s)
- Shibo Xiang
- Institute
of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
- Key
Laboratory of Trans-Scale Laser Manufacturing Technology, Beijing University of Technology, Ministry of Education, Beijing 100124, China
- Beijing
Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China
| | - Yanping Yuan
- Institute
of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
- Key
Laboratory of Trans-Scale Laser Manufacturing Technology, Beijing University of Technology, Ministry of Education, Beijing 100124, China
- Beijing
Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China
| | - Chengyu Zhang
- Institute
of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
- Key
Laboratory of Trans-Scale Laser Manufacturing Technology, Beijing University of Technology, Ministry of Education, Beijing 100124, China
- Beijing
Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China
| | - Jimin Chen
- Institute
of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
- Key
Laboratory of Trans-Scale Laser Manufacturing Technology, Beijing University of Technology, Ministry of Education, Beijing 100124, China
- Beijing
Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124, China
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Ravoor J, Thangavel M, Elsen S R. Comprehensive Review on Design and Manufacturing of Bio-scaffolds for Bone Reconstruction. ACS APPLIED BIO MATERIALS 2021; 4:8129-8158. [PMID: 35005929 DOI: 10.1021/acsabm.1c00949] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Bio-scaffolds are synthetic entities widely employed in bone and soft-tissue regeneration applications. These bio-scaffolds are applied to the defect site to provide support and favor cell attachment and growth, thereby enhancing the regeneration of the defective site. The progressive research in bio-scaffold fabrication has led to identification of biocompatible and mechanically stable materials. The difficulties in obtaining grafts and expenditure incurred in the transplantation procedures have also been overcome by the implantation of bio-scaffolds. Drugs, cells, growth factors, and biomolecules can be embedded with bio-scaffolds to provide localized treatments. The right choice of materials and fabrication approaches can help in developing bio-scaffolds with required properties. This review mostly focuses on the available materials and bio-scaffold techniques for bone and soft-tissue regeneration application. The first part of this review gives insight into the various classes of biomaterials involved in bio-scaffold fabrication followed by design and simulation techniques. The latter discusses the various additive, subtractive, hybrid, and other improved techniques involved in the development of bio-scaffolds for bone regeneration applications. Techniques involving multimaterial printing and multidimensional printing have also been briefly discussed.
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Affiliation(s)
- Jishita Ravoor
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Mahendran Thangavel
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
| | - Renold Elsen S
- School of Mechanical Engineering Vellore Institute of Technology, Vellore, Tamil Nadu 632014, India
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CECI S, BERATE P, CANDREA S, BABTAN AM, AZZOLLINI D, PIRAS F, CURATOLI L, CORRIERO A, PATANO A, VALENTE F, MAGGIORE ME, MANCINI A, GIOVANNIELLO D, NUCCI L, ELIA R, SIRBU A, GALDERISI A, CARDARELLI F. The oral and gut microbiota: beyond a short communication. BALNEO AND PRM RESEARCH JOURNAL 2021. [DOI: 10.12680/balneo.2021.471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Introduction. The current treatment and prevention of oral disorders, dental caries, periodontal and gum diseases, follow a very non-specific control of plaque as the main causative factor. The main therapeutically approach is carried out on the sole perspective to keep the levels of oral bacteria in an acceptable range compatible with one-way vision of oral-mouth health, as something completely separated from a systemic microbial homeostasis (dysbiosis) concomitant present in the gut. A sealed compartmental view which sees separate and incommunicable responses to a specific condition without considering the presence of interacting confounding factors can negatively influence the diagnosis a diseases and of course its progression. A general non-specific antimicrobial with more general antiplaque therapy based mainly on oral care products together with surgery interventions represent at the moment the only mechanical responses in treating oral diseases.
Material and method. The present paper is a narrative review concening interractions between oral and gut microbiota, with a focus on the interdisciplinary approach in antimicrobial treatment. Pubmed, Cochrane Library database were used for searching engines. Key words used were as follows: “inflammatory bowel syndrome (IBS)”, “ulcerative colitis”, “oral dysbiosis”, “gut dysbiosis”, “probiotics”, “periodontitis”.
Results and discussions. Literature research showed that there are few issues to be discussed the ever increasing resistance to antibiotics, the high consumption of industrial food and sugars and their negatively effect on gut and oral microbiota. There is a need to highlight and develop a novel philosophical approach in the treatments for oral diseases that will necessarily involve non-conventional antimicrobial solutions. Such approaches should preferably reduce the consumption of both intestinal and oral microbiota, that are intimately connected and host approximately well over 1000 different species of bacteria at 108–109 bacteria per mL of mucous and saliva. Preventive approaches based upon the restoration of the microbial ecological balance, rather than elimination of the disease associated species, have been proposed.
Conclusions. Having both oral-gut microbiota screened is an essential moment that influence the healthy immune modulatory and regenerative capacity of the body and, the new proposed formula integrates a wider screen on the patients where oral condition is strictly evaluated together with gut screen; therefore any proposed treatment will be inevitably sustained by the use of prebiotics and probiotics to promote health-associated bacterial growth.
Keywords: inflammatory bowel syndrome (IBS), ulcerative colitis, oral dysbiosis, gut dysbiosis, probiotics, periodontitis,
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Affiliation(s)
- Sabino CECI
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Pula BERATE
- 2. Privat clinic, Allias Vure, Rruga, Tirane, Albania
| | - Sebastian CANDREA
- 3. Department of Oral Rehabilitation, University of Medicine and Pharmacy “Iuliu Hatieganu”, Cluj-Napoca, Romania
| | - Anida-Maria BABTAN
- 3. Department of Oral Rehabilitation, University of Medicine and Pharmacy “Iuliu Hatieganu”, Cluj-Napoca, Romania
| | - Daniela AZZOLLINI
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Fabio PIRAS
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Luigi CURATOLI
- 4. Department Neurosciences & Sensory Organs & Musculoskeletal system. University of Bari “Aldo Moro”, Bari, Italy
| | - Alberto CORRIERO
- 5. Unit of Anesthesia and Resuscitation, Department of Emergencies and Organ Transplantations, “Aldo Moro” University, Bari, Italy
| | - Assunta PATANO
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Francesco VALENTE
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Maria Elena MAGGIORE
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | - Antonio MANCINI
- 1. Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
| | | | - Ludovica NUCCI
- 7. Multidisciplinary Department of Medical-Surgical and Dental Specialties, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Rossella ELIA
- Bari University “Aldo Moro”, place Giulio Cesare, Bari, Italy
| | - Adina SIRBU
- Department of Oral Health, University of Medicine and Pharmacy “Iuliu Hatieganu”, Cluj-Napoca, Romania
| | | | - Fillippo CARDARELLI
- Department of Interdisciplinary Medicine (D.I.M), University of Medicine “Aldo Moro”, Bari, Italy
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Perier-Metz C, Duda GN, Checa S. Initial mechanical conditions within an optimized bone scaffold do not ensure bone regeneration - an in silico analysis. Biomech Model Mechanobiol 2021; 20:1723-1731. [PMID: 34097188 PMCID: PMC8450217 DOI: 10.1007/s10237-021-01472-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/28/2021] [Indexed: 11/26/2022]
Abstract
Large bone defects remain a clinical challenge because they do not heal spontaneously. 3-D printed scaffolds are a promising treatment option for such critical defects. Recent scaffold design strategies have made use of computer modelling techniques to optimize scaffold design. In particular, scaffold geometries have been optimized to avoid mechanical failure and recently also to provide a distinct mechanical stimulation to cells within the scaffold pores. This way, mechanical strain levels are optimized to favour the bone tissue formation. However, bone regeneration is a highly dynamic process where the mechanical conditions immediately after surgery might not ensure optimal regeneration throughout healing. Here, we investigated in silico whether scaffolds presenting optimal mechanical conditions for bone regeneration immediately after surgery also present an optimal design for the full regeneration process. A computer framework, combining an automatic parametric scaffold design generation with a mechano-biological bone regeneration model, was developed to predict the level of regenerated bone volume for a large range of scaffold designs and to compare it with the scaffold pore volume fraction under favourable mechanical stimuli immediately after surgery. We found that many scaffold designs could be considered as highly beneficial for bone healing immediately after surgery; however, most of them did not show optimal bone formation in later regenerative phases. This study allowed to gain a more thorough understanding of the effect of scaffold geometry changes on bone regeneration and how to maximize regenerated bone volume in the long term.
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Affiliation(s)
- Camille Perier-Metz
- Julius Wolff Institute, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
- MINES ParisTech - PSL Research University, Paris, France
| | - Georg N Duda
- Julius Wolff Institute, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sara Checa
- Julius Wolff Institute, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany.
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Uriciuc WA, Vermesan H, Tiuc AE, Ilea A, Bosca AB, Popa CO. Casting over Metal Method Used in Manufacturing Hybrid Cobalt-Chromium Dental Prosthetic Frameworks Assembles. MATERIALS 2021; 14:ma14030539. [PMID: 33498642 PMCID: PMC7866098 DOI: 10.3390/ma14030539] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 11/29/2022]
Abstract
Cobalt–chromium (Co–Cr) alloys are the most widely used materials for removable and fixed dental prosthetic frameworks. The fitting accuracy between these components in dental prosthetic frameworks assembles (DPFAs) is largely influenced by the manufacturing method. This study presents a novel manufacturing method that combined two common techniques for obtaining one single framework: casting of Co–Cr inserts on top of parts previously manufactured by selective laser melting (SLM) of Co–Cr powder (CoM). Horizontal (n = 4) and vertical (n = 3) surfaces were microscopically analyzed (n = 770 count sum). The results revealed a high precision of the process and high fitting accuracy between the hybrid frameworks. The average distance measured between the frameworks in joined position was 41.08 ± 7.56 µm. In conclusion, the manufacturing of Co–Cr alloys DPFA using the CoM method reduced the deformation of hybrid frameworks and improved the joining accuracy between them.
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Affiliation(s)
- Willi Andrei Uriciuc
- Faculty of Dental Medicine, “Iuliu-Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (W.A.U.); (A.I.)
| | - Horatiu Vermesan
- Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, 400461 Cluj-Napoca, Romania; (A.E.T.); (C.O.P.)
- Correspondence:
| | - Ancuta Elena Tiuc
- Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, 400461 Cluj-Napoca, Romania; (A.E.T.); (C.O.P.)
| | - Aranka Ilea
- Faculty of Dental Medicine, “Iuliu-Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (W.A.U.); (A.I.)
| | - Adina Bianca Bosca
- Faculty of Medicine, “Iuliu-Hațieganu” University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania;
| | - Catalin Ovidiu Popa
- Faculty of Materials and Environmental Engineering, Technical University of Cluj-Napoca, 400461 Cluj-Napoca, Romania; (A.E.T.); (C.O.P.)
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