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Application Solid Laser-Sintered or Machined Ti6Al4V Alloy in Manufacturing of Dental Implants and Dental Prosthetic Restorations According to Dentistry 4.0 Concept. Processes (Basel) 2020. [DOI: 10.3390/pr8060664] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This paper presents a comparison of the impact of milling technology in the computer numerically controlled (CNC) machining centre and selective laser sintering (SLS) and on the structure and properties of solid Ti6Al4V alloy. It has been shown that even small changes in technological conditions in the SLS manufacturing variant significantly affect changes from two to nearly two and a half times in tensile and bending strengths. Both the tensile and bending strength obtained in the most favourable manufacturing variant by the SLS method is over 25% higher than in the case of cast materials subsequently processed by milling. Plug-and-play SLS conditions provide about 60% of the possibilities. Structural, tribological and electrochemical tests were carried out. In vitro biological tests using osteoblasts confirm the good tendency for the proliferation of live cells on the substrate manufactured under the most favourable SLS conditions. The use of SLS additive technology for the manufacturing of dental implants and abutments made of Ti6Al4V alloy in combination with the digitisation of dental diagnostics and computer-aided design and manufacture of computer-aided design/manufacturing (CAD/CAM) following the idea of Dentistry 4.0 is the best choice of technology for manufacturing of prosthetic and implant devices used in dentistry.
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Salah M, Tayebi L, Moharamzadeh K, Naini FB. Three-dimensional bio-printing and bone tissue engineering: technical innovations and potential applications in maxillofacial reconstructive surgery. Maxillofac Plast Reconstr Surg 2020; 42:18. [PMID: 32548078 PMCID: PMC7270214 DOI: 10.1186/s40902-020-00263-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 05/24/2020] [Indexed: 12/13/2022] Open
Abstract
Background Bone grafting has been considered the gold standard for hard tissue reconstructive surgery and is widely used for large mandibular defect reconstruction. However, the midface encompasses delicate structures that are surrounded by a complex bone architecture, which makes bone grafting using traditional methods very challenging. Three-dimensional (3D) bioprinting is a developing technology that is derived from the evolution of additive manufacturing. It enables precise development of a scaffold from different available biomaterials that mimic the shape, size, and dimension of a defect without relying only on the surgeon’s skills and capabilities, and subsequently, may enhance surgical outcomes and, in turn, patient satisfaction and quality of life. Review This review summarizes different biomaterial classes that can be used in 3D bioprinters as bioinks to fabricate bone scaffolds, including polymers, bioceramics, and composites. It also describes the advantages and limitations of the three currently used 3D bioprinting technologies: inkjet bioprinting, micro-extrusion, and laser-assisted bioprinting. Conclusions Although 3D bioprinting technology is still in its infancy and requires further development and optimization both in biomaterials and techniques, it offers great promise and potential for facial reconstruction with improved outcome.
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Affiliation(s)
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI USA
| | - Keyvan Moharamzadeh
- Academic Unit of Restorative Dentistry, School of Clinical Dentistry, University of Sheffield, Sheffield, UK
| | - Farhad B Naini
- Kingston and St George's Hospitals and St George's Medical School, London, SW17 0QT UK
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Fiorillo L, Cervino G, Russo D, Itro A, Laino L, Cicciù M. Transcortical bone capillary vessels network: implication on the maxillofacial district. ACTA ACUST UNITED AC 2020; 69:309-316. [PMID: 32407058 DOI: 10.23736/s0026-4970.20.04294-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The field of medicine takes steps forward every day. Although some aspects of our organism seem clear, scientific discoveries also affect fields such as anatomy. Recently, transcortical vessels (TCVs) have been debated, although it was thought that cortical bones were not interested by these structures. This would upset some concepts of oral surgery, maxillofacial surgery, periodontics and implantology. EVIDENCE ACQUSITION In this study an analysis of the literature on this topic was carried out, and it is proposed to understand the possible implications of TCVs to the oral health. EVIDENCE SYNTHESIS Being a current topic, the aim of the study is to promote research in this field, leading to the evidence of these anatomical structures in the maxillofacial district. This study is of a prospective type, there are no other results that speak of these vessels in the maxillofacial district, waiting for a histological study. CONCLUSIONS The purpose of the study, therefore, is to shed light on this topic, so that the research could move in this direction.
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Affiliation(s)
- Luca Fiorillo
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina University, Messina, Italy.,Department of Biomedical and Surgical and Biomedical Sciences, Naples University, Naples, Italy
| | - Gabriele Cervino
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina University, Messina, Italy
| | - Diana Russo
- Department of Biomedical and Surgical and Biomedical Sciences, Naples University, Naples, Italy
| | - Annalisa Itro
- Department of Biomedical and Surgical and Biomedical Sciences, Naples University, Naples, Italy
| | - Luigi Laino
- Department of Biomedical and Surgical and Biomedical Sciences, Naples University, Naples, Italy
| | - Marco Cicciù
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, Messina University, Messina, Italy -
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Smoczok M, Starszak K, Starszak W. 3D Printing as a Significant Achievement for Application in Posttraumatic Surgeries - A Literature Review. Curr Med Imaging 2020; 17:814-819. [PMID: 32386498 DOI: 10.2174/1573405616666200510003811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/05/2020] [Accepted: 04/14/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND 3D printing is increasingly used in many fields of medicine. The broadening of knowledge in this field and the cooperation of doctors and engineers increase the interest in this technology and results in attempts to implement it at every stage of the treatment. OBJECTIVE The review aims to summarize the current literature on the use of 3D printing technology in the treatment of post-trauma patients. METHODS A review of available scientific publications in PubMed regarding 3D printing and its application in the context of posttraumatic procedures was carried out. Clinical Trials and Reviews from the period 2014-2019 (6-year period) were taken into consideration. The database was searched for "Printing", "ThreeDimensional" [MAJR] [MeSH Term]. Finally, 48 studies have been included in our review article. RESULTS 3D printing technology has a number of applications in patients who have suffered injuries. 3D printing has found application in the preparation of procedures, accurate visualization of occurring injuries and complications, education of doctors and patients, prototyping, creation of synthetic scaffolding, production and implementation of target implants and rehabilitation. CONCLUSION 3D printing is increasingly used in providing for posttraumatic patients. It is necessary to conduct further research in this area and to provide development opportunities regarding biopolymers and bioprinting. It is also necessary to improve cooperation between doctors and engineers and to create new centres that can comprehensively use 3D printing - from imaging diagnostics to the production of implants and their surgical use.
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Affiliation(s)
- Michał Smoczok
- Department of Biophysics, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland
| | - Krzysztof Starszak
- Department of Orthopaedics, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland
| | - Weronika Starszak
- Students' Scientific Society, Department of Ophthalmology, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland
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Dentistry 4.0 Concept in the Design and Manufacturing of Prosthetic Dental Restorations. Processes (Basel) 2020. [DOI: 10.3390/pr8050525] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The paper is a comprehensive but compact review of the literature on the state of illnesses of the human stomatognathic system, related consequences in the form of dental deficiencies, and the resulting need for prosthetic treatment. Types of prosthetic restorations, including implants, as well as new classes of implantable devices called implant-scaffolds with a porous part integrated with a solid core, as well as biological engineering materials with the use of living cells, have been characterized. A review of works on current trends in the technical development of dental prosthetics aiding, called Dentistry 4.0, analogous to the concept of the highest stage of Industry 4.0 of the industrial revolution, has been presented. Authors’ own augmented holistic model of Industry 4.0 has been developed and presented. The studies on the significance of cone-beam computed tomography (CBCT) in planning prosthetic treatment, as well as in the design and manufacture of prosthetic restorations, have been described. The presented and fully digital approach is a radical turnaround in both clinical procedures and the technologies of implant preparation using computer-aided design and manufacturing methods (CAD/CAM) and additive manufacturing (AM) technologies, including selective laser sintering (SLS). The authors’ research illustrates the practical application of the Dentistry 4.0 approach for several types of prosthetic restorations. The development process of the modern approach is being observed all over the world. The use of the principles of the augmented holistic model of Industry 4.0 in advanced dental engineering indicates a change in the traditional relationship between a dentist and a dental engineer. The overall conclusion demonstrates that it is inevitable and extremely beneficial to implement the idea of Dentistry 4.0 following the assumptions of the authors’ own, holistic Industry 4.0 model.
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Evaluation of BMP-2 and VEGF loaded 3D printed hydroxyapatite composite scaffolds with enhanced osteogenic capacity in vitro and in vivo. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 112:110893. [PMID: 32409051 DOI: 10.1016/j.msec.2020.110893] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 03/02/2020] [Accepted: 03/20/2020] [Indexed: 11/22/2022]
Abstract
Large-sized bone defect repair is a challenging task in orthopedic surgery. Porous scaffolds with controlled release of growth factors have been investigated for many years. In this study, a hydroxyapatite composite scaffold was prepared by 3D printing at low temperature and coating with layer-by-layer (LBL) assembly. Bone morphogenic protein-2 (BMP-2) and vascular endothelial growth factors (VEGF) were loaded into the composite scaffolds. The release of dual growth factors was analyzed in vitro. The cell growth and osteogenic differentiation were assessed by culturing MC3T3-E1 cells onto the scaffolds. In an established rabbit model of critical-sized calvarial defect (15 mm in diameter), the osteogenic and angiogenic properties after implantation of scaffolds were evaluated by micro-computed tomography (micro-CT) and stained sections. Our results showed that the scaffolds possessed well-designed porous structure and could release two growth factors in a sustained way. The micro-CT analysis showed that the scaffolds with BMP-2/VEGF could accelerate new bone formation. Findings of immunochemical staining of collagen type I and lectin indicated that better osteogenic and angiogenic properties induced by BMP-2 and VEGF. These results suggested that the novel composite scaffolds combined with BMP-2/VEGF had both osteogenic and angiogenic abilities which could enhance new bone formation with good quality. Thus, the combination of 3D printed scaffolds loaded with BMP-2/VEGF might provide a potential solution for bone repair and regeneration in clinical applications.
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Tissue Engineering and Regenerative Medicine in Craniofacial Reconstruction and Facial Aesthetics. J Craniofac Surg 2020; 31:15-27. [PMID: 31369496 DOI: 10.1097/scs.0000000000005840] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The craniofacial region is anatomically complex and is of critical functional and cosmetic importance, making reconstruction challenging. The limitations of current surgical options highlight the importance of developing new strategies to restore the form, function, and esthetics of missing or damaged soft tissue and skeletal tissue in the face and cranium. Regenerative medicine (RM) is an expanding field which combines the principles of tissue engineering (TE) and self-healing in the regeneration of cells, tissues, and organs, to restore their impaired function. RM offers many advantages over current treatments as tissue can be engineered for specific defects, using an unlimited supply of bioengineered resources, and does not require immunosuppression. In the craniofacial region, TE and RM are being increasingly used in preclinical and clinical studies to reconstruct bone, cartilage, soft tissue, nerves, and blood vessels. This review outlines the current progress that has been made toward the engineering of these tissues for craniofacial reconstruction and facial esthetics.
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Transclival approaches for intradural pathologies: historical overview and present scenario. Neurosurg Rev 2020; 44:279-287. [PMID: 32060761 DOI: 10.1007/s10143-020-01263-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/29/2019] [Accepted: 02/06/2020] [Indexed: 12/17/2022]
Abstract
Recently, endoscopic transsphenoidal transclival approaches have been developed and their role is widely accepted for extradural pathologies. Their application to intradural pathologies is still debated, but is undoubtedly increasing. In the past five decades, different authors have reported various extracranial, anterior transclival approaches for intradural pathologies. The aim of this review is to provide a historical overview of transclival approaches applied to intradural pathologies. PubMed was searched in October 2018 using the terms transcliv*, cliv* intradural, transsphenoidal transcliv*, transoral transcliv*, transcervical transcliv*, transsphenoidal brainstem, and transoral brainstem. Exclusion criteria included not reporting reconstruction technique, anatomical studies, reviews without new data, and transcranial approaches. Ninety-one studies were included in the systematic review. Since 1966, transcervical, transoral, transsphenoidal microsurgical, and, recently, endoscopic routes have been used as a corridor for transclival approaches to treat intradural pathologies. Each approach presents a curve that follows Scott's parabola, with evident phases of enthusiasm that quickly faded, possibly due to high post-operative CSF leak rates and other complications. It is evident that the introduction of the endoscope has led to a significant increase in reports of transclival approaches for intradural pathologies. Various reconstruction techniques and materials have been used, although rates of CSF leak remain relatively high. Transclival approaches for intradural pathologies have a long history. We are now in a new era of interest, but achieving effective dural and skull base reconstruction must still be definitively addressed, possibly with the use of newly available technologies.
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Moncal KK, Aydin RST, Abu-Laban M, Heo DN, Rizk E, Tucker SM, Lewis GS, Hayes D, Ozbolat IT. Collagen-infilled 3D printed scaffolds loaded with miR-148b-transfected bone marrow stem cells improve calvarial bone regeneration in rats. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:110128. [PMID: 31546389 PMCID: PMC6761997 DOI: 10.1016/j.msec.2019.110128] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 08/05/2019] [Accepted: 08/23/2019] [Indexed: 12/12/2022]
Abstract
Differentiation of progenitors in a controlled environment improves the repair of critical-sized calvarial bone defects; however, integrating micro RNA (miRNA) therapy with 3D printed scaffolds still remains a challenge for craniofacial reconstruction. In this study, we aimed to engineer three-dimensional (3D) printed hybrid scaffolds as a new ex situ miR-148b expressing delivery system for osteogenic induction of rat bone marrow stem cells (rBMSCs) in vitro, and also in vivo in critical-sized rat calvarial defects. miR-148b-transfected rBMSCs underwent early differentiation in collagen-infilled 3D printed hybrid scaffolds, expressing significant levels of osteogenic markers compared to non-transfected rBMSCs, as confirmed by gene expression and immunohistochemical staining. Furthermore, after eight weeks of implantation, micro-computed tomography, histology and immunohistochemical staining results indicated that scaffolds loaded with miR-148b-transfected rBMSCs improved bone regeneration considerably compared to the scaffolds loaded with non-transfected rBMSCs and facilitated near-complete repair of critical-sized calvarial defects. In conclusion, our results demonstrate that collagen-infilled 3D printed scaffolds serve as an effective system for miRNA transfected progenitor cells, which has a promising potential for stimulating osteogenesis and calvarial bone repair.
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Affiliation(s)
- Kazim K Moncal
- Engineering Science and Mechanics, Penn State University, University Park, PA, USA; Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA
| | - R Seda Tigli Aydin
- Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA; Department of Biomedical Engineering, Bulent Ecevit University, Incivez, Zonguldak, Turkey
| | - Mohammad Abu-Laban
- Department of Biomedical Engineering, Penn State University, University Park, PA, USA; Materials Research Institute, Penn State University, University Park, PA, USA
| | - Dong N Heo
- Engineering Science and Mechanics, Penn State University, University Park, PA, USA; Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA
| | - Elias Rizk
- Department of Neurosurgery, Penn State University, Hershey, PA, USA
| | - Scott M Tucker
- Engineering Science and Mechanics, Penn State University, University Park, PA, USA; Department of Orthopaedics and Rehabilitation, Penn State University, Hershey, PA, USA
| | - Gregory S Lewis
- Engineering Science and Mechanics, Penn State University, University Park, PA, USA; Department of Orthopaedics and Rehabilitation, Penn State University, Hershey, PA, USA
| | - Daniel Hayes
- Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA; Department of Biomedical Engineering, Penn State University, University Park, PA, USA; Materials Research Institute, Penn State University, University Park, PA, USA
| | - Ibrahim T Ozbolat
- Engineering Science and Mechanics, Penn State University, University Park, PA, USA; Huck Institutes of the Life Sciences, Penn State University, University Park, PA, USA; Department of Biomedical Engineering, Penn State University, University Park, PA, USA; Materials Research Institute, Penn State University, University Park, PA, USA.
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Ruiters S, Mombaerts I. Applications of three-dimensional printing in orbital diseases and disorders. Curr Opin Ophthalmol 2019; 30:372-379. [PMID: 31261186 DOI: 10.1097/icu.0000000000000586] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF REVIEW To comprehensively review the applications of advanced three-dimensional printing technology in the management of orbital abnormalities. RECENT FINDINGS Three-dimensional printing has added value in the preoperative planning and manufacturing of patient-specific implants and surgical guides in the reconstruction of orbital trauma, congenital defects and tumor resection. In view of the costs and time, it is reserved as strategy for large and complex craniofacial cases, in particular those including the bony contour. There is anecdotal evidence of a benefit of three-dimensional printing in the manufacturing of prostheses for the exenterated and anophthalmic socket, and in the fabrication of patient-specific boluses, applicators and shielding devices for orbital radiation therapy. In addition, three-dimensional printed healthy and diseased orbits as phantom tangible models may augment the teaching and learning process of orbital surgery. SUMMARY Three-dimensional printing allows precision treatment tailored to the unique orbital anatomy of the patient. Advancement in technology and further research are required to support its wider use in orbital clinical practice.
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Affiliation(s)
- Sébastien Ruiters
- Department of Ophthalmology, University Hospitals Leuven, Leuven, Belgium
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Radiation Exposure and Operation Time in Percutaneous Endoscopic Lumbar Discectomy Using Fluoroscopy-Based Navigation System. World Neurosurg 2019; 127:e39-e48. [PMID: 30802551 DOI: 10.1016/j.wneu.2019.01.289] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study evaluated radiation exposure and operation time of percutaneous endoscopic lumbar discectomy (PELD) by using a fluoroscopy-based navigation system for access and localization. METHODS Eighty-six PELDs performed by a single surgeon were retrospectively analyzed. Patients were separated into 2 groups: group A (using a three-dimensional [3D]-printed navigation instrument and fluoroscopy-based navigation system) and group B (with conventional fluoroscopy and standard instrumentation). The operation, fluoroscopy, and total access time were collected, as well as fluoroscopy and access times. RESULTS The operative time for group A was 59 minutes (standard deviation [SD], 6 minutes) and 106 minutes (SD, 15 minutes) in group B (P < 0.001). In group A, fluoroscopy was used an average of 5 times (SD, 0.7) and 29 times (SD, 8) in group B (P < 0.001). The fluoroscopy time was 9 minutes (SD, 2 minutes) in group A and 40 minutes (SD, 8 minutes) in group B (P < 0.001). The number of access attempts was 1.3 (SD, 0.5) in group A and 8 (SD, 2 times) in group B (P < 0.001). The total access time was 11 minutes (SD, 2 minutes) in group A and 28 minutes (SD, 5 minutes) in group B (P < 0.001). CONCLUSIONS PELD using the fluoroscopy-based navigation system showed lower operative, fluoroscopy, and access time compared with conventional techniques. In addition, fewer fluoroscopy images and access attempts were made in the navigation group. These data suggest that this novel technique reduces fluoroscopy and operation time and may reduce risks of repeated surgical access attempts.
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