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Vidal CMP, Carrilho MR. Dentin Degradation: From Tissue Breakdown to Possibilities for Therapeutic Intervention. CURRENT ORAL HEALTH REPORTS 2023; 10:99-110. [PMID: 37928132 PMCID: PMC10624336 DOI: 10.1007/s40496-023-00341-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/09/2023] [Indexed: 11/07/2023]
Abstract
Purpose of the Review Presently, dental materials science is driven by the search for new and improved materials that can trigger specific reactions from the affected tissue to stimulate repair or regeneration while interacting with the oral environment to promote or maintain oral health. In parallel, evidence from the past decades has challenged the exclusive role of bacteria in dentin tissue degradation in caries, questioning our understanding of caries etiopathogenesis. The goal of this review is to recapitulate the current evidence on the host and bacterial contributions to degradation, inflammation, and repair of the dentin-pulp complex in caries. Recent Findings Contrasting findings attribute dentin breakdown to the activity of endogenous enzymes, such as matrix metalloproteinases (MMPs) and cathepsins, while the role of bacteria and their by-products in the destruction of dentin organic matrix and pulp inflammation has been for decades supported as an incontestable paradigm. Aiming to better understand the mechanisms involved in collagen degradation by host enzymes in caries, studies have showed that these proteinases are expressed in the mature dentin (i.e., after dentin formation) and become activated by the low pH in the acidic environment resulted by bacterial metabolism in caries. However, different host sources other than dentin-bound proteinases seem to also contribute to caries progression, such as saliva and pulp. Interestingly, studies evaluating pulp responses to bacteria invasion and inflammation in caries report higher levels of MMPs and cathepsins in inflamed tissue, but also showed MMP potential to resolve inflammation and stimulate wound healing. Notably, as reported for other tissues, MMPs exert dual roles in the dentin-pulp complex in caries, participating or regulating both degradative and reparative mechanisms. Summary The specific roles of host and bacteria and their by-products in caries progression have yet to be clarified. The complex interactions between inflammation and repair in caries pose challenges to a clear understanding of the dentin-pulp complex responses and changes to bacteria invasion. However, it opens new venues for the development of novel therapies and dental biomaterials based on the modulation of specific mechanisms to favor tissue repair and healing.
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Affiliation(s)
- Cristina M. P. Vidal
- Department of Operative Dentistry, College of Dentistry, The University of Iowa, 801 Newton Road, DSB S245, Iowa City, IA 52242, USA
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Sadeghian A, Kharaziha M, Khoroushi M. Dentin extracellular matrix loaded bioactive glass/GelMA support rapid bone mineralization for potential pulp regeneration. Int J Biol Macromol 2023; 234:123771. [PMID: 36812970 DOI: 10.1016/j.ijbiomac.2023.123771] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/07/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023]
Abstract
The study aims to develop a novel dentin extracellular matrix (dECM) loaded gelatin methacrylate (GelMA)-5 wt% bioactive glass (BG) (Gel-BG) hydrogel for dental pulp regeneration. We investigate the role of dECM content (2.5, 5, and 10 wt%) on the physicochemical characteristics and biological responses of Gel-BG hydrogel in contact with stem cells isolated from human exfoliated deciduous teeth (SHED). Results showed that the compressive strength of Gel-BG/dECM hydrogel significantly enhanced from 18.9 ± 0.5 kPa (at Gel-BG) to 79.8 ± 3.0 kPa after incorporation of 10 wt% dECM. Moreover, we found that in vitro bioactivity of Gel-BG improved and the degradation rate and swelling ratio reduced with increasing dECM content. The hybrid hydrogels also revealed effectual biocompatibility, >138 % cell viability after 7 days of culture; where Gel-BG/5%dECM was most suitable. In addition, the incorporation of 5 wt% dECM within Gel-BG considerably improved alkaline phosphatase (ALP) activity and osteogenic differentiation of SHED cells. Taken together, the novel bioengineered Gel-BG/dECM hydrogels having appropriate bioactivity, degradation rate, osteoconductive and mechanical properties represent the potential applications for clinical practice in the future.
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Affiliation(s)
- Aida Sadeghian
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mahshid Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Maryam Khoroushi
- Torabinejad Dental Research Institute, Dental Materials Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan 81746-73461, Iran
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3
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Cunha D, Souza N, Moreira M, Rodrigues N, Silva P, Franca C, Horsophonphong S, Sercia A, Subbiah R, Tahayeri A, Ferracane J, Yelick P, Saboia V, Bertassoni L. 3D-printed microgels supplemented with dentin matrix molecules as a novel biomaterial for direct pulp capping. Clin Oral Investig 2023; 27:1215-1225. [PMID: 36287273 PMCID: PMC10171721 DOI: 10.1007/s00784-022-04735-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 10/01/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To develop a 3D-printed, microparticulate hydrogel supplemented with dentin matrix molecules (DMM) as a novel regenerative strategy for dental pulp capping. MATERIALS AND METHODS Gelatin methacryloyl microgels (7% w/v) mixed with varying concentrations of DMM were printed using a digital light projection 3D printer and lyophilized for 2 days. The release profile of the DMM-loaded microgels was measured using a bicinchoninic acid assay. Next, dental pulp exposure defects were created in maxillary first molars of Wistar rats. The exposures were randomly capped with (1) inert material - negative control, (2) microgels, (3) microgels + DMM 500 µg/ml, (4) microgels + DMM 1000 µg/ml, (5) microgels + platelet-derived growth factor (PDGF 10 ng/ml), or (6) MTA (n = 15/group). After 4 weeks, animals were euthanized, and treated molars were harvested and then processed to evaluate hard tissue deposition, pulp tissue organization, and blood vessel density. RESULTS All the specimens from groups treated with microgel + 500 µg/ml, microgel + 1000 µg/ml, microgel + PDGF, and MTA showed the formation of organized pulp tissue, tertiary dentin, newly formed tubular and atubular dentin, and new blood vessel formation. Dentin bridge formation was greater and pulp necrosis was less in the microgel + DMM groups compared to MTA. CONCLUSIONS The 3D-printed photocurable microgels doped with DMM exhibited favorable cellular and inflammatory pulp responses, and significantly more tertiary dentin deposition. CLINICAL RELEVANCE 3D-printed microgel with DMM is a promising biomaterial for dentin and dental pulp regeneration in pulp capping procedures.
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Affiliation(s)
- Diana Cunha
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Nayara Souza
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Manuela Moreira
- School of Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Nara Rodrigues
- School of Dentistry, University of Fortaleza, Fortaleza, Ceará, Brazil
| | - Paulo Silva
- School of Dentistry, University of Fortaleza, Fortaleza, Ceará, Brazil
| | - Cristiane Franca
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Sivaporn Horsophonphong
- Department of Pediatric Dentistry, Faculty of Dentistry, Mahidol University, Salaya, Thailand
| | - Ashley Sercia
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Ramesh Subbiah
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Jack Ferracane
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Pamela Yelick
- Department of Orthodontics, School of Medicine, School of Engineering, Tufts University, Boston, MA, 02111, USA
| | - Vicente Saboia
- Department of Restorative Dentistry, Faculty of Pharmacy, Dentistry and Nursing, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Luiz Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
- Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA.
- Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA.
- Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA.
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4
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Treated Dentin Matrix in Tissue Regeneration: Recent Advances. Pharmaceutics 2022; 15:pharmaceutics15010091. [PMID: 36678720 PMCID: PMC9861705 DOI: 10.3390/pharmaceutics15010091] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
Tissue engineering is a new therapeutic strategy used to repair serious damage caused by trauma, a tumor or other major diseases, either for vital organs or tissues sited in the oral cavity. Scaffold materials are an indispensable part of this. As an extracellular-matrix-based bio-material, treated dentin matrixes have become promising tissue engineering scaffolds due to their unique natural structure, astonishing biological induction activity and benign bio-compatibility. Furthermore, it is important to note that besides its high bio-activity, a treated dentin matrix can also serve as a carrier and release controller for drug molecules and bio-active agents to contribute to tissue regeneration and immunomodulation processes. This paper describes the research advances of treated dentin matrixes in tissue regeneration from the aspects of its vital properties, biologically inductive abilities and application explorations. Furthermore, we present the concerning challenges of signaling mechanisms, source extension, individualized 3D printing and drug delivery system construction during our investigation into the treated dentin matrix. This paper is expected to provide a reference for further research on treated dentin matrixes in tissue regeneration and better promote the development of relevant disease treatment approaches.
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Franca CM, Balbinot GDS, Cunha D, Saboia VDPA, Ferracane J, Bertassoni LE. In-vitro models of biocompatibility testing for restorative dental materials: From 2D cultures to organs on-a-chip. Acta Biomater 2022; 150:58-66. [PMID: 35933103 PMCID: PMC9814917 DOI: 10.1016/j.actbio.2022.07.060] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/13/2022] [Accepted: 07/28/2022] [Indexed: 02/08/2023]
Abstract
Dental caries is a biofilm-mediated, diet-modulated, multifactorial and dynamic disease that affects more than 90% of adults in Western countries. The current treatment for decayed tissue is based on using materials to replace the lost enamel or dentin. More than 500 million dental restorations are placed annually worldwide, and materials used for these purposes either directly or indirectly interact with dentin and pulp tissues. The development and understanding of the effects of restorative dental materials are based on different in-vitro and in-vivo tests, which have been evolving with time. In this review, we first discuss the characteristics of the tooth and the dentin-pulp interface that are unique for materials testing. Subsequently, we discuss frequently used in-vitro tests to evaluate the biocompatibility of dental materials commonly used for restorative procedures. Finally, we present our perspective on the future directions for biological research on dental materials using tissue engineering and organs on-a-chip approaches. STATEMENT OF SIGNIFICANCE: Dental caries is still the most prevalent infectious disease globally, requiring more than 500 million restorations to be placed every year. Regrettably, the failure rates of such restorations are still high. Those rates are partially based on the fact that current platforms to test dental materials are somewhat inaccurate in reproducing critical components of the complex oral microenvironment. Thus, there is a collective effort to develop new materials while evolving the platforms to test them. In this context, the present review critically discusses in-vitro models used to evaluate the biocompatibility of restorative dental materials and brings a perspective on future directions for tissue-engineered and organs-on-a-chip platforms for testing new dental materials.
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Affiliation(s)
- Cristiane Miranda Franca
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States
| | - Gabriela de Souza Balbinot
- Dental Materials Laboratory, School of Dentistry, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Diana Cunha
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | - Jack Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States
| | - Luiz E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, United States; Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, United States; Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, United States; Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, United States.
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Evaluation of Injectable Hyaluronic Acid-Based Hydrogels for Endodontic Tissue Regeneration. MATERIALS 2021; 14:ma14237325. [PMID: 34885481 PMCID: PMC8658597 DOI: 10.3390/ma14237325] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 12/22/2022]
Abstract
Dental pulp tissue engineering (TE) endeavors to regenerate dentin/pulp complex by combining a suitable supporting matrix, stem cells, and biochemical stimuli. Such procedures foresee a matrix that can be easily introduced into the root canal system (RCS) and tightly adhere to dentin walls to assure the dentin surface’s proper colonization with progenitor cells capable of restoring the dentin/pulp complex. Herein was investigated an injectable self-setting hyaluronic acid-based (HA) hydrogel system, formed by aldehyde-modified (a-HA) with hydrazide-modified (ADH), enriched with platelet lysate (PL), for endodontic regeneration. The hydrogels’ working (wT) and setting (sT) times, the adhesion to the dentine walls, the hydrogel’s microstructure, and the delivery of human dental pulp cells (DPCs) were studied in vitro. Hydrogels incorporating PL showed a suitable wT and sT and a porous microstructure. The tensile tests showed that the breaking point occurs after 4.3106 ± 1.8677 mm deformation, while in the indentation test after 1.4056 ± 0.3065 mm deformation. Both breaking points occur in the hydrogel extension. The HA/PL hydrogels exhibited supportive properties and promoted cell migration toward dentin surfaces in vitro. Overall, these results support using PL-laden HA injectable hydrogels (HA/PL) as a biomaterial for DPCs encapsulation, thereby displaying great clinical potential towards endodontic regenerative therapies.
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Hsiao HY, Nien CY, Hong HH, Cheng MH, Yen TH. Application of dental stem cells in three-dimensional tissue regeneration. World J Stem Cells 2021; 13:1610-1624. [PMID: 34909114 PMCID: PMC8641025 DOI: 10.4252/wjsc.v13.i11.1610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/06/2021] [Accepted: 09/29/2021] [Indexed: 02/06/2023] Open
Abstract
Dental stem cells can differentiate into different types of cells. Dental pulp stem cells, stem cells from human exfoliated deciduous teeth, periodontal ligament stem cells, stem cells from apical papilla, and dental follicle progenitor cells are five different types of dental stem cells that have been identified during different stages of tooth development. The availability of dental stem cells from discarded or removed teeth makes them promising candidates for tissue engineering. In recent years, three-dimensional (3D) tissue scaffolds have been used to reconstruct and restore different anatomical defects. With rapid advances in 3D tissue engineering, dental stem cells have been used in the regeneration of 3D engineered tissue. This review presents an overview of different types of dental stem cells used in 3D tissue regeneration, which are currently the most common type of stem cells used to treat human tissue conditions.
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Affiliation(s)
- Hui-Yi Hsiao
- Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
| | - Chung-Yi Nien
- Department of Life Sciences, National Central University, Zhongli, Taoyuan 320, Taiwan
| | - Hsiang-Hsi Hong
- Department of Periodontics, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
| | - Ming-Huei Cheng
- Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
- Division of Reconstructive Microsurgery, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Linkou Branch, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
| | - Tzung-Hai Yen
- Center for Tissue Engineering, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
- Department of Nephrology, Clinical Poison Center, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333, Taiwan
- School of Traditional Chinese Medicine, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan
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8
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Functional Dental Pulp Regeneration: Basic Research and Clinical Translation. Int J Mol Sci 2021; 22:ijms22168991. [PMID: 34445703 PMCID: PMC8396610 DOI: 10.3390/ijms22168991] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/12/2021] [Accepted: 08/17/2021] [Indexed: 12/12/2022] Open
Abstract
Pulpal and periapical diseases account for a large proportion of dental visits, the current treatments for which are root canal therapy (RCT) and pulp revascularisation. Despite the clinical signs of full recovery and histological reconstruction, true regeneration of pulp tissues is still far from being achieved. The goal of regenerative endodontics is to promote normal pulp function recovery in inflamed or necrotic teeth that would result in true regeneration of the pulpodentinal complex. Recently, rapid progress has been made related to tissue engineering-mediated pulp regeneration, which combines stem cells, biomaterials, and growth factors. Since the successful isolation and characterisation of dental pulp stem cells (DPSCs) and other applicable dental mesenchymal stem cells, basic research and preclinical exploration of stem cell-mediated functional pulp regeneration via cell transplantation and cell homing have received considerably more attention. Some of this effort has translated into clinical therapeutic applications, bringing a ground-breaking revolution and a new perspective to the endodontic field. In this article, we retrospectively examined the current treatment status and clinical goals of pulpal and periapical diseases and scrutinized biological studies of functional pulp regeneration with a focus on DPSCs, biomaterials, and growth factors. Then, we reviewed preclinical experiments based on various animal models and research strategies. Finally, we summarised the current challenges encountered in preclinical or clinical regenerative applications and suggested promising solutions to address these challenges to guide tissue engineering-mediated clinical translation in the future.
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9
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Photobiomodulation therapy does not depend on the differentiation of dental pulp cells to enhance functional activity associated with angiogenesis and mineralization. Lasers Med Sci 2021; 36:1979-1988. [PMID: 34374881 DOI: 10.1007/s10103-021-03395-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 08/01/2021] [Indexed: 10/20/2022]
Abstract
The purpose of this study is to analyze the influence of InGaAlP diode laser (660 nm) with or without an odontogenic medium (OM) in the functional activity of OD-21 cells. Undifferentiated OD-21 pulp cells were cultivated with or without OM and divided into four groups (n = 5): nonirradiated control (C -), nonirradiated + OM (C +), irradiated (L -), and irradiated + OM (L +). Laser application was performed in two sessions of a 24-h interval with an irradiance of 11.3 mW/cm2, energy density of 1 J/cm2, and total cumulative energy/well of 4.6 J. Cell proliferation, VEGF-164 expression, mineralization, and expression of Alp, Runx2, and Dmp1 genes, as well as immunolocalization of RUNX2 and MEPE proteins, were evaluated. Data were analyzed by statistical tests (α = 0.05). All studied groups showed a similar increase in cell proliferation with or without OM. After 7 and 10 days, a significatively higher concentration of VEGF-164 in L - group when compared to C - group was observed. A significant increase in mineralized nodules in the L + was noted when compared to C + in the same conditions. Photobiomodulation upregulated significantly Runx2 and Dmp1 expression after 10 days in L - and after 7 days in L + , with downregulation of Dmp1 after 10 days in L + group. Immunolocalization of RUNX2 and MEPE was expressive after 7 days of culture in the cytoplasm adjacent to the nucleus with a decrease after 10 days, regardless of the presence of OM. Photobiomodulation enhances metabolism associated with angiogenesis, gene expression, and mineralization regardless of the odontogenic medium in OD-21 cells.
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10
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Platform technologies for regenerative endodontics from multifunctional biomaterials to tooth-on-a-chip strategies. Clin Oral Investig 2021; 25:4749-4779. [PMID: 34181097 DOI: 10.1007/s00784-021-04013-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/24/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVES The aim of this review is to highlight recent progress in the field of biomaterials-mediated dental pulp tissue engineering. Specifically, we aim to underscore the critical design criteria of biomaterial platforms that are advantageous for pulp tissue engineering, discuss models for preclinical evaluation, and present new and innovative multifunctional strategies that hold promise for clinical translation. MATERIALS AND METHODS The current article is a comprehensive overview of recent progress over the last 5 years. In detail, we surveyed the literature in regenerative pulp biology, including novel biologic and biomaterials approaches, and those that combined multiple strategies, towards more clinically relevant models. PubMed searches were performed using the keywords: "regenerative dentistry," "dental pulp regeneration," "regenerative endodontics," and "dental pulp therapy." RESULTS Significant contributions to the field of regenerative dentistry have been made in the last 5 years, as evidenced by a significant body of publications. We chose exemplary studies that we believe are progressive towards clinically translatable solutions. We close this review with an outlook towards the future of pulp regeneration strategies and their clinical translation. CONCLUSIONS Current clinical treatments lack functional and predictable pulp regeneration and are more focused on the treatment of the consequences of pulp exposure, rather than the restoration of healthy dental pulp. CLINICAL RELEVANCE Clinically, there is great demand for bioinspired biomaterial strategies that are safe, efficacious, and easy to use, and clinicians are eager for their clinical translation. In particular, we place emphasis on strategies that combine favorable angiogenesis, mineralization, and functional tissue formation, while limiting immune reaction, risk of microbial infection, and pulp necrosis.
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Rodrigues NS, França CM, Tahayeri A, Ren Z, Saboia VPA, Smith AJ, Ferracane JL, Koo H, Bertassoni LE. Biomaterial and Biofilm Interactions with the Pulp-Dentin Complex-on-a-Chip. J Dent Res 2021; 100:1136-1143. [PMID: 34036838 DOI: 10.1177/00220345211016429] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Calcium silicate cements (CSCs) are the choice materials for vital pulp therapy because of their bioactive properties, promotion of pulp repair, and dentin bridge formation. Despite the significant progress made in understanding CSCs' mechanisms of action, the key events that characterize the early interplay between CSC-dentin-pulp are still poorly understood. To address this gap, a microfluidic device, the "tooth-on-a-chip," which was developed to emulate the biomaterial-dentin-pulp interface, was used to test 1) the effect of CSCs (ProRoot, Biodentine, and TheraCal) on the viability and proliferation of human dental pulp stem cells, 2) variations of pH, and 3) release within the pulp chamber of transforming growth factor-β (TGFβ) as a surrogate of the bioactive dentin matrix molecules. ProRoot significantly increased the extraction of TGFβ (P < 0.05) within 24 to 72 h and, along with Biodentine, induced higher cell proliferation (P > 0.05), while TheraCal decreased cell viability and provoked atypical changes in cell morphology. No correlation between TGFβ levels and pH was observed. Further, we established a biofilm of Streptococcus mutans on-chip to model the biomaterial-biofilm-dentin interface and conducted a live and dead assay to test the antimicrobial capability of ProRoot in real time. In conclusion, the device allows for direct characterization of the interaction of bioactive dental materials with the dentin-pulp complex on a model of restored tooth while enabling assessment of antibiofilm properties at the interface in real time that was previously unattainable.
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Affiliation(s)
- N S Rodrigues
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - C M França
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - A Tahayeri
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Z Ren
- Department of Orthodontics, Divisions of Community Oral Health & Pediatric Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - V P A Saboia
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - A J Smith
- School of Dentistry, University of Birmingham, Birmingham, UK
| | - J L Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - H Koo
- Department of Orthodontics, Divisions of Community Oral Health & Pediatric Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Center for Innovation & Precision Dentistry, School of Dental Medicine and School of Engineering & Applied Sciences, University of Pennsylvania, Philadelphia, PA, USA
| | - L E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.,Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA.,Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA.,Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA
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12
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Li H, Ma B, Yang H, Qiao J, Tian W, Yu R. Xenogeneic dentin matrix as a scaffold for biomineralization and induced odontogenesis. Biomed Mater 2021; 16. [PMID: 33902010 DOI: 10.1088/1748-605x/abfbbe] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 04/26/2021] [Indexed: 02/08/2023]
Abstract
Commonly recognized mechanisms of the xenogeneic-extracellular matrix-based regenerative medicine include timely degradation, release of bioactive molecules, induced differentiation of stem cells, and well-controlled inflammation. This process is most feasible for stromal tissue reconstruction, yet unsuitable for non-degradable scaffold and prefabricated-shaped tissue regeneration, like odontogenesis. Treated dentin matrix (TDM) has been identified as a bioactive scaffold for dentin regeneration. This study explored xenogeneic porcine TDM (pTDM) for induced odontogenesis. The biological characteristics of pTDM were compared with human TDM (hTDM). To investigate its bioinductive capacities on allogeneic dental follicle cells (DFCs) in the inflammation microenvironment, pTDM populated with human DFCs were co-cultured with human peripheral blood mononuclear cells (hPBMCs), and pTDM populated with rat DFCs were transplanted into rat subcutaneous model. The results showed pTDM possessed similar mineral phases and bioactive molecules with hTDM. hDFCs, under the induction of pTDM and hTDM, expressed similar col-I, osteopontin and alkaline phosphatase (ALP) (all expressed by odontoblasts). Whereas, the expression of col-I, dentin matrix protein-1 (DMP-1) and bone sialoprotein (BSP) were down-regulated when cocultured with hPBMCs. The xenogeneic implants inevitably initiated Th1 inflammation (up-regulated CD8, TNF-α, IL-1β, etc)in vivo. However, the biomineralization of pre-dentin and cementum were still processed, and collagen fibrils, odontoblast-like cells, fibroblasts contributed to odontogenesis. Although partially absorbed at 3 weeks, the implants were positively expressed odontogenesis-related-proteins like col-I and DMP-1. Taken together, xenogeneic TDM conserved ultrastructure and molecules for introducing allogeneic DFCs to odontogenic differentiation, and promoting odontogenesis and biomineralizationin vivo. Yet effective immunomodulation methods warrant further explorations.
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Affiliation(s)
- Hui Li
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Bo Ma
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Hefeng Yang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China.,Department of Dental Research, The Affiliated Stomatological Hospital of Kunming Medical University, Kunming, People's Republic of China
| | - Jia Qiao
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China
| | - Weidong Tian
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China.,National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Riyue Yu
- Department of Stomatology, Beijing Shijitan Hospital, Capital Medical University, Beijing, People's Republic of China
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13
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Effect of Remineralized Collagen on Dentin Bond Strength through Calcium Phosphate Ion Clusters or Metastable Calcium Phosphate Solution. NANOMATERIALS 2020; 10:nano10112203. [PMID: 33158249 PMCID: PMC7694251 DOI: 10.3390/nano10112203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 10/26/2020] [Accepted: 11/02/2020] [Indexed: 01/09/2023]
Abstract
This study aimed to investigate whether dentin remineralization and micro-tensile bond strength increase when using calcium phosphate ion clusters (CPICs) or metastable Ca-P. After being etched, each dentin specimen was designated into four groups and treated with the appropriate solution for 1 min: 100% ethanol, 2 and 1 mg/mL of CPICs, and metastable Ca-P. The specimens were then prepared for scanning electron microscopy (SEM), transmission electron microscropy (TEM) imaging, a matrix metalloproteinases inhibition assay, and the micro-tensile bond strength test. To compare among the groups, one-way analysis of variance was performed. In the SEM imaging, with a rising concentration of CPICs, the degree of remineralization of dentin increased significantly. The metastable Ca-P treated specimens showed a similar level of remineralization as the 1 mg/mL CPICs treated specimens. The TEM imaging also revealed that dentin remineralization occurs in a CPICs concentration-dependent manner between the demineralized dentin and the resin layer. Furthermore, the results of micro-tensile bond strength showed the same trend as the results confirmed by SEM and TEM. We demonstrated that a 1 min pretreatment of CPICs or metastable Ca-P in etched dentin collagen fibril can achieve biomimetic remineralization and increase micro-tensile bond strength.
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14
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Li X, Wang L, Su Q, Ye L, Zhou X, Zhang L, Song D, Huang D. Potential Roles of Bone Morphogenetic Protein 9 in the Odontogenic Differentiation of Dental Pulp Cells. J Endod 2020; 47:436-443. [PMID: 33129897 DOI: 10.1016/j.joen.2020.10.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 10/22/2020] [Accepted: 10/26/2020] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The differentiation of dental pulp cells (DPCs) plays an important role in the repair of dental pulp injury. Bone morphogenetic protein 9 (BMP9) is one of the most effective BMPs to induce the differentiation of stem cells. However, the role of BMP9 in promoting the odontogenic differentiation of DPCs and dentinogenesis is worth knowing. METHODS Fluorescence in situ hybridization and immunohistochemistry staining were performed to detect the BMP9 expression in human dental pulp. BMP9 was overexpressed in human DPCs (hDPCs), and the mineralization of hDPCs was tested by alkaline phosphatase staining and alizarin red staining. The expression of odontogenic differentiation-related genes was examined by quantitative real-time polymerase chain reaction and western blotting. The subcutaneous transplantation experiment was performed to test the odonto-induction ability of BMP9 in vivo. The rat direct pulp-capping experiment was performed to test the function of BMP9 in promoting dentin formation. RESULTS BMP9 showed an increased expression in odontoblast layer at both the mRNA and protein levels. BMP9 enhanced the mineralization and induced the expression of odontogenic differentiation-related genes in hDPCs. More mineralized nodules, and increased expression of dentin sialophosphoprotein (DSPP) and dentin matrix protein-1 (DMP1) were detected in the beta-tricalcium phosphate scaffold/cells composites of BMP9 group compared with the control group. Meanwhile, there was thicker reparative dentin formation in the BMP9 group in the rat pulp exposure experiment. CONCLUSIONS BMP9 participates in the process of DPC differentiation and promotes DPC mineralization and dentinogenesis. BMP9 might be a potential therapeutic target in the repair of dental pulp injury.
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Affiliation(s)
- Xiangfen Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Liu Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qin Su
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ling Ye
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lan Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dongzhe Song
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Dingming Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China; Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
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15
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Horsophonphong S, Sercia A, França CM, Tahayeri A, Reddy AP, Wilmarth PA, Surarit R, Smith AJ, Ferracane JL, Bertassoni LE. Equivalence of human and bovine dentin matrix molecules for dental pulp regeneration: proteomic analysis and biological function. Arch Oral Biol 2020; 119:104888. [PMID: 32932150 DOI: 10.1016/j.archoralbio.2020.104888] [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: 05/01/2020] [Revised: 08/13/2020] [Accepted: 08/21/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To compare proteomics and biological function of human dentin matrix molecules (hDMMs) and bovine dentin matrix molecules (bDMMs). DESIGN Dentin powder from human or bovine teeth (n = 4) was demineralized in 10% (v/v) ethylenediaminetetraacetic acid for 7 days. The extracts were dialyzed, lyophilized and proteins were characterized using liquid chromatography-tandem mass spectrometry and shotgun proteomic analysis. To study biological function, mouse-derived undifferentiated dental pulp cells (OD21) were treated with 0.01, 0.1 or 1 μg/mL of hDMMs or bDMMs and proliferation was measured after 24 hours and 48 hours using 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Cell migration was assessed after 24 hours using a Boyden chamber. Alizarin Red S staining was used to evaluate mineral formation. RESULTS There were 307 proteins identified, of which 93 proteins were common to both species. Gene Ontology functional analysis demonstrated similar pattern of biological process in both species which consisted mainly of tissue development and biomineralization. hDMMs and bDMMs both enhanced cell proliferation. After 24 hours, all concentrations of bDMMs promoted cell proliferation (p ≤ 0.05), while hDMMs did not affect proliferation. After 48 hours, groups with 1μg/mL of bDMMs and 0.01μg/mL of hDMMs had increased cell proliferation compared to control (p ≤ 0.0001). All concentrations of hDMMs and bDMMs enhanced cell migration and mineralization (p ≤ 0.0001). CONCLUSION bDMMs has similar biological functions as hDMMs. Moreover, bDMMs stimulated cell proliferation, migration and differentiation similar to hDMMs.
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Affiliation(s)
- Sivaporn Horsophonphong
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA; Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand; Department of Pediatric Dentistry, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Ashley Sercia
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Cristiane M França
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Anthony Tahayeri
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Ashok P Reddy
- Proteomics Shared Resource, Oregon Health and & Science University, Portland, OR, 97239, USA
| | - Phillip A Wilmarth
- Proteomics Shared Resource, Oregon Health and & Science University, Portland, OR, 97239, USA
| | - Rudee Surarit
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Anthony J Smith
- School of Dentistry, University of Birmingham, Birmingham, UK
| | - Jack L Ferracane
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA
| | - Luiz E Bertassoni
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA; Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA; Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA; Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA.
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16
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Gao X, Qin W, Chen L, Fan W, Ma T, Schneider A, Yang M, Obianom ON, Chen J, Weir MD, Shu Y, Zhao L, Lin Z, Xu HHK. Effects of Targeted Delivery of Metformin and Dental Pulp Stem Cells on Osteogenesis via Demineralized Dentin Matrix under High Glucose Conditions. ACS Biomater Sci Eng 2020; 6:2346-2356. [PMID: 33455311 DOI: 10.1021/acsbiomaterials.0c00124] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
High glucose condition inhibited osteoblast differentiation could be a main mechanism contributing to the decreased bone repair associated with diabetes. Metformin, a widely prescribed antidiabetic drug, was shown to have osteogenic properties in our previous study. Transplanted mesenchymal stromal cells (MSCs) may differentiate into osteoblasts and promote bone regeneration. Our study aimed to combine the benefits of metformin and MSCs transplantation on osteogenesis in high glucose conditions. We developed demineralized dentin matrix (DDM) as a carrier to target deliver metformin and dental pulp-derived MSCs (DPSCs). We collected clinically discarded teeth, isolated DPSCs from the dental pulp, and prepared the DDM from the dentin. The DDM was observed by scanning electron microscopy and was found to have well-distributed tubes. Then, metformin was loaded into the DDM to form the DDM-Met complex (DDM-Met); DDM-Met released metformin at a favorable concentration. The DPSCs seeded with the DDM-Met in a high glucose medium showed satisfactory attachment and viability together with increased mineralization and upregulated osteogenesis-related genes, including alkaline phosphatase (ALP), osteocalcin (OCN), runt-related transcription factor 2 (Runx2), and osteopontin (OPN). A possible mechanism of the enhanced osteogenic differentiation of DPSCs was explored, and the adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) pathway was found to play a role in the enhancement of osteogenesis. DDM-Met appeared to be a successful metformin and DPSC carrier that allowed for the local delivery of metformin and DPSCs in high glucose conditions. DDM-Met-DPSC construct has promising prospects to promote osteogenesis and enhance the much-needed diabetic bone regeneration.
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Affiliation(s)
- Xianling Gao
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China.,Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Wei Qin
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China.,Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Lingling Chen
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Wenguo Fan
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Tao Ma
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Abraham Schneider
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Mengyao Yang
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Obinna N Obianom
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201, United States
| | - Jiayao Chen
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Michael D Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
| | - Yan Shu
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, Maryland 21201, United States
| | - Liang Zhao
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States.,Department of Orthopedic Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
| | - Zhengmei Lin
- Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, P. R. China
| | - Hockin H K Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States.,Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland 21201, United States
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17
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Xiang M, Zhu M, Yang Z, He P, Wei J, Gao X, Song J. Dual-Functionalized Apatite Nanocomposites with Enhanced Cytocompatibility and Osteogenesis for Periodontal Bone Regeneration. ACS Biomater Sci Eng 2020; 6:1704-1714. [PMID: 33455384 DOI: 10.1021/acsbiomaterials.9b01893] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of biomimetic bone graft materials for periodontal tissue engineering is a field of topical interest. In this study, we designed a dual-functionalized apatite nanocomposite, which could integrate multiple molecular cues for manipulating the fate of periodontal ligament stem cells (PDLSCs). Briefly, inspired by mussels, a biomimetic nanohydroxyapatite was fabricated using a polydopamine structure as a template (named as tHA) and then surface-modified with bone-forming peptide-1 (BFP-1) and vascular endothelial growth factor-mimicking peptide (QK) via a single step of catechol chemistry. Our study showed that the biofunctions of tethered peptides were not compromised on the surface of apatite nanoparticles. Because of the synergistic effect of BFP-1 and QK peptides, the dual-functionalized apatite nanocomposite showed improved cytocompatibility compared to controls. Moreover, it can boost the proliferation and osteogenic differentiation of PDLSCs, indicating excellent bioactivity of tHA-BFP/QK nanoparticles on cell fate decision. More importantly, animal experiments showed that dual-functionalized apatite nanocomposites could dramatically promote the regeneration of periodontal bone. It is concluded that our work provides an instructive insight into the design of biomimetic apatite nanocomposites, which holds a great potential for applications in periodontal bone repair.
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Affiliation(s)
- MingLi Xiang
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
| | - Mengyuan Zhu
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
| | - Zun Yang
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
| | - Ping He
- Dazhou Central Hospital, Dazhou 635000, SiChuan, China
| | - Jingjing Wei
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
| | - Xiang Gao
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
| | - Jinlin Song
- College of Stomatology, Chongqing Medical University, Chongqing 401147, China.,Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing 401147, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing 401147, China
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18
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França CM, Tahayeri A, Rodrigues NS, Ferdosian S, Puppin Rontani RM, Sereda G, Ferracane JL, Bertassoni LE. The tooth on-a-chip: a microphysiologic model system mimicking the biologic interface of the tooth with biomaterials. LAB ON A CHIP 2020; 20:405-413. [PMID: 31854401 PMCID: PMC7395925 DOI: 10.1039/c9lc00915a] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The tooth has a unique configuration with respect to biomaterials that are used for its treatment. Cells inside of the dental pulp interface indirectly with biomaterials via a calcified permeable membrane, formed by the dentin matrix and several thousands of dentinal tubules (∼2 μm in diameter). Although the cytotoxic response of the dental pulp to biomaterials has been extensively studied, there is a shortage of in vitro model systems that mimic the dentin-pulp interface and enable an improved understanding of the morphologic, metabolic and functional influence of biomaterials on live dental pulp cells. To address this shortage, here we developed an organ-on-a-chip model system which integrates cells cultured directly on a dentin wall within a microfluidic device that replicates some of the architecture and dynamics of the dentin-pulp interface. The tooth-on-a-chip is made out of molded polydimethylsiloxane (PDMS) with a design consisting of two chambers separated by a dentin fragment. To characterize pulp cell responses to dental materials on-chip, stem cells from the apical papilla (SCAPs) were cultured in odontogenic medium and seeded onto the dentin surface, and observed using live-cell microscopy. Next, to evaluate the tooth-on-a-chip as a platform for materials testing, standard dental materials used clinically (2-hydroxyethylmethacrylate - HEMA, phosphoric acid - PA, and Adper-Scotchbond - SB) were tested for cytotoxicity, cell morphology, and metabolic activity on-chip, and compared against standardized off-chip controls. All dental materials had cytotoxic effects in both on-chip and off-chip systems in the following order: HEMA > SB > PA (p < 0.05), and cells presented consistently higher metabolic activity on-chip than off-chip (p < 0.05). Furthermore, the tooth-on-a-chip enabled real-time tracking of gelatinolytic activity in a model hybrid layer (HL) formed in the microdevice, which suggests that dental pulp cells may contribute to the proteolytic activity in the HL more than endogenous proteases. In conclusion, the tooth-on-a-chip is a novel platform that replicates near-physiologic conditions of the pulp-dentin interface and enables live-cell imaging to study dental pulp cell response to biomaterials.
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Affiliation(s)
- Cristiane Miranda França
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Anthony Tahayeri
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Nara Sousa Rodrigues
- Post-Graduation Program in Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Shirin Ferdosian
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | | | - Grigoriy Sereda
- Department of Chemistry, University of South Dakota, Vermillion, SD, USA
| | - Jack L Ferracane
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA.
| | - Luiz E Bertassoni
- Department of Restorative Dentistry, School of Dentistry, Oregon Health & Science University, Portland, OR, USA. and Center for Regenerative Medicine, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Department of Biomedical Engineering, School of Medicine, Oregon Health & Science University, Portland, OR, USA and Cancer Early Detection Advanced Research Center (CEDAR), Knight Cancer Institute, Portland, OR, USA
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19
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Paula AB, Laranjo M, Marto CM, Paulo S, Abrantes AM, Fernandes B, Casalta-Lopes J, Marques-Ferreira M, Botelho MF, Carrilho E. Evaluation of dentinogenesis inducer biomaterials: an in vivo study. J Appl Oral Sci 2019; 28:e20190023. [PMID: 31800871 PMCID: PMC6886398 DOI: 10.1590/1678-7757-2019-0023] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 06/29/2019] [Indexed: 12/16/2022] Open
Abstract
When exposure of the pulp to external environment occurs, reparative dentinogenesis can be induced by direct pulp capping to maintain pulp tissue vitality and function. These clinical situations require the use of materials that induce dentin repair and, subsequently, formation of a mineralized tissue. Objective: This work aims to assess the effect of tricalcium silicate cements and mineral trioxide aggregate cements, including repairing dentin formation and inflammatory reactions over time after pulp exposure in Wistar rats. Methodology: These two biomaterials were compared with positive control groups (open cavity with pulp tissue exposure) and negative control groups (no intervention). The evaluations were performed in three stages; three, seven and twenty-one days, and consisted of an imaging (nuclear medicine) and histological evaluation (H&E staining, immunohistochemistry and Alizarin Red S). Results: The therapeutic effect of these biomaterials was confirmed. Nuclear medicine evaluation demonstrated that the uptake of 99mTc-Hydroxymethylene diphosphonate (HMDP) showed no significant differences between the different experimental groups and the control, revealing the non-occurrence of differences in the phosphocalcium metabolism. The histological study demonstrated that in mineral trioxide aggregate therapies, the presence of moderate inflammatory infiltration was found after three days, decreasing during follow-ups. The formation of mineralized tissue was only verified at 21 days of follow-up. The tricalcium silicate therapies demonstrated the presence of a slight inflammatory infiltration on the third day, increasing throughout the follow-up. The formation of mineralized tissue was observed in the seventh follow-up day, increasing over time. Conclusions: The mineral trioxide aggregate (WhiteProRoot®MTA) and tricalcium silicate (Biodentine™) present slight and reversible inflammatory signs in the pulp tissue, with the formation of mineralized tissue. However, the exacerbated induction of mineralized tissue formation with the tricalcium silicate biomaterial may lead to the formation of pulp calcifications
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Affiliation(s)
- Anabela B Paula
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Prática Clínica Integrada, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Mafalda Laranjo
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Carlos-Miguel Marto
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Prática Clínica Integrada, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Patologia Experimental, Coimbra, Portugal
| | - Siri Paulo
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Prática Clínica Integrada, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Ana M Abrantes
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Bruno Fernandes
- Centro Hospitalar e Universitário do Porto, Departamento de Patologia, Porto, Portugal
| | - João Casalta-Lopes
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Coimbra University Hospital Center, Radiation Oncology Department, Coimbra, Portugal
| | - Manuel Marques-Ferreira
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Prática Clínica Integrada, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Maria Filomena Botelho
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
| | - Eunice Carrilho
- Universidade de Coimbra, Faculdade de Medicina, Instituto de Prática Clínica Integrada, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Biofísica, Coimbra, Portugal.,Universidade de Coimbra, Faculdade de Medicina, Instituto de Pesquisa Clínica e Biomédica, area of Environment Genetics and Oncobiology (CIMAGO), Coimbra, Portugal.,Universidade de Coimbra, CNC.IBILI, Coimbra, Portugal
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Biodentine ™ Boosts, WhiteProRoot ®MTA Increases and Life ® Suppresses Odontoblast Activity. MATERIALS 2019; 12:ma12071184. [PMID: 30978943 PMCID: PMC6479701 DOI: 10.3390/ma12071184] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/06/2019] [Accepted: 04/09/2019] [Indexed: 12/12/2022]
Abstract
(1) Background: When pulp exposure occurs, reparative dentinogenesis can be induced by direct pulp capping to maintain the vitality and function of the tissue. The aim of this work was to assess the cytotoxicity and bioactivity of three different direct pulp capping materials, calcium hydroxide (Life®), mineral trioxide aggregate (WhiteProRoot®MTA) and calcium silicate (Biodentine™), in an odontoblast-like mouse cell line (MDPC-23). (2) Methods: Metabolic activity was assessed by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide test (MTT)assay, viability by the sulforhodamine B (SRB) assay, and the type of death and cell cycle analysis by flow cytometry. Alkaline phosphatase was evaluated by polymerase chain reaction (PCR), and dentin sialoprotein expression was assessed by immunocytochemistry. Mineralization was determined by the Alizarin Red S colorimetric assay and quantified by spectrophotometry. (3) Results: Life® induced a decrease in metabolic activity and viability, which is associated with an increase cell death. WhiteProRoot®MTA and Biodentine™ induced similar effects in cytotoxicity assays, with an increase in the expression of dentin sialoprotein (DSP) and formation of mineralized deposits, especially with Biodentine™. (4) Conclusions: The results of WhiteProRoot®MTA confirm its indication for these therapies, justifying its recognition as the “gold standard”. Biodentine™ may be an alternative, since they promote the same cellular response that mineral trioxide aggregate (MTA) does.
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Nano-Structured Demineralized Human Dentin Matrix to Enhance Bone and Dental Repair and Regeneration. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9051013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Demineralized dentin matrix (DDM), derived from human teeth, is an excellent scaffold material with exciting bioactive properties to enhance bone and dental tissue engineering efficacy. In this article, first the nano-structure and bioactive components of the dentin matrix were reviewed. Then the preparation methods of DDM and the resulting properties were discussed. Next, the efficacy of DDM as a bone substitute with in vitro and in vivo properties were analyzed. In addition, the applications of DDM in tooth regeneration with promising results were described, and the drawbacks and future research needs were also discussed. With the extraction of growth factors from DDM and the nano-structural properties of DDM, previous studies also broadened the use of DDM as a bioactive carrier for growth factor delivery. In addition, due to its excellent physical and biological properties, DDM was also investigated for incorporation into other biomaterials design and fabrication, yielding great enhancements in hard tissue regeneration efficacy.
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Deniz Sungur D, Aksel H, Ozturk S, Yılmaz Z, Ulubayram K. Effect of dentine conditioning with phytic acid or etidronic acid on growth factor release, dental pulp stem cell migration and viability. Int Endod J 2019; 52:838-846. [DOI: 10.1111/iej.13066] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 12/12/2018] [Indexed: 11/28/2022]
Affiliation(s)
- D. Deniz Sungur
- Department of Endodontics Hacettepe University Faculty of Dentistry Ankara Turkey
| | - H. Aksel
- Department of Endodontics Hacettepe University Faculty of Dentistry Ankara Turkey
- Department of Periodontics and Endodontics School of Dental Medicine University at Buffalo Buffalo NY USA
| | - S. Ozturk
- Bioengineering Department Gebze Technical University KocaeliTurkey
- Bioengineering Division Institute for Graduate Studies in Science and Engineering Hacettepe University AnkaraTurkey
| | - Z. Yılmaz
- Department of Endodontics Hacettepe University Faculty of Dentistry Ankara Turkey
| | - K. Ulubayram
- Bioengineering Division Institute for Graduate Studies in Science and Engineering Hacettepe University AnkaraTurkey
- Department of Basic Pharmaceutical Sciences Faculty of Pharmacy Hacettepe University Ankara Turkey
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Dentinogenic effects of extracted dentin matrix components digested with matrix metalloproteinases. Sci Rep 2018; 8:10690. [PMID: 30013085 PMCID: PMC6048071 DOI: 10.1038/s41598-018-29112-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 07/05/2018] [Indexed: 01/28/2023] Open
Abstract
Dentin is primarily composed of hydroxyapatite crystals within a rich organic matrix. The organic matrix comprises collagenous structural components, within which a variety of bioactive molecules are sequestered. During caries progression, dentin is degraded by acids and enzymes derived from various sources, which can release bioactive molecules with potential reparative activity towards the dentin-pulp complex. While these molecules’ repair activities in other tissues are already known, their biological effects are unclear in relation to degradation events during disease in the dentin-pulp complex. This study was undertaken to investigate the effects of dentin matrix components (DMCs) that are partially digested by matrix metalloproteinases (MMPs) in vitro and in vivo during wound healing of the dentin-pulp complex. DMCs were initially isolated from healthy dentin and treated with recombinant MMPs. Subsequently, their effects on the behaviour of primary pulp cells were investigated in vitro and in vivo. Digested DMCs modulated a range of pulp cell functions in vitro. In addition, DMCs partially digested with MMP-20 stimulated tertiary dentin formation in vivo, which exhibited a more regular tubular structure than that induced by treatment with other MMPs. Our results indicate that MMP-20 may be especially effective in stimulating wound healing of the dentin-pulp complex.
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Paula AB, Laranjo M, Marto CM, Paulo S, Abrantes AM, Casalta-Lopes J, Marques-Ferreira M, Botelho MF, Carrilho E. Direct Pulp Capping: What is the Most Effective Therapy?-Systematic Review and Meta-Analysis. J Evid Based Dent Pract 2018; 18:298-314. [PMID: 30514444 DOI: 10.1016/j.jebdp.2018.02.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/05/2018] [Accepted: 02/05/2018] [Indexed: 01/16/2023]
Abstract
INTRODUCTION Direct pulp capping therapies use biomaterials to protect exposed tissues, inducing repair through the production of a mineralized barrier. The purpose of this study was to compare the effectiveness of biomaterials and techniques by means of a systematic review and meta-analysis. METHODS The PubMed, Cochrane, and Embase databases were used to search the literature published from January 1, 1980 until August 31, 2017. Studies that met inclusion criteria were screened by 2 authors individually. The meta-analysis was performed on mineral trioxide aggregate (MTA) cement vs calcium hydroxide cement, tricalcium silicate cement vs MTA cement, and adhesive systems vs CaOH cement and evaluated the success rate, inflammatory response, and dentin bridge formation. RESULTS Forty-six studies were included in the systematic review, while 22 studies were included in the meta-analysis. There was no significant heterogeneity between the studies. MTA cements showed a significantly higher success rate, in all parameters, compared with calcium hydroxide cements (odds ratio = 2.72; 95% confidence interval [CI] = 1.90-3.90; P = 0.000). However, when compared with the tricalcium silicate cements, there were no statistically significant differences (odds ratio = 1.18; 95% CI = 0.53-2.65; P = 0.672). Adhesive systems showed a significantly lower success rate, in all parameters, compared with calcium hydroxide cements (odds ratio = 0.062; 95% CI = 0.024-0.157; P = 0.000). CONCLUSIONS MTA cements have a higher success rate, with a lower inflammatory response and a more predictable hard dentin barrier formation than calcium hydroxide cements. However, there were no differences, in these parameters, when MTA cement was compared with tricalcium silicate cements. Dental adhesives systems showed the lowest success rates.
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Affiliation(s)
- Anabela B Paula
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal.
| | - Mafalda Laranjo
- Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - Carlos-Miguel Marto
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal; Experimental Pathology Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Siri Paulo
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - Ana M Abrantes
- Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - João Casalta-Lopes
- Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Radiation Oncology Department, Coimbra University Hospital Center, Coimbra, Portugal
| | - Manuel Marques-Ferreira
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - Maria Filomena Botelho
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
| | - Eunice Carrilho
- Dentistry Area, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Biophysics Institute, Faculty of Medicine, University of Coimbra, Coimbra, Portugal; Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, Coimbra, Portugal; CNC.IBILI, University of Coimbra, Coimbra, Portugal
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Athirasala A, Tahayeri A, Thrivikraman G, França CM, Monteiro N, Tran V, Ferracane J, Bertassoni LE. A dentin-derived hydrogel bioink for 3D bioprinting of cell laden scaffolds for regenerative dentistry. Biofabrication 2018; 10:024101. [PMID: 29320372 DOI: 10.1088/1758-5090/aa9b4e] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Recent studies in tissue engineering have adopted extracellular matrix (ECM) derived scaffolds as natural and cytocompatible microenvironments for tissue regeneration. The dentin matrix, specifically, has been shown to be associated with a host of soluble and insoluble signaling molecules that can promote odontogenesis. Here, we have developed a novel bioink, blending printable alginate (3% w/v) hydrogels with the soluble and insoluble fractions of the dentin matrix. We have optimized the printing parameters and the concentrations of the individual components of the bioink for print accuracy, cell viability and odontogenic potential. We find that, while viscosity, and hence printability of the bioinks, was greater in the formulations containing higher concentrations of alginate, a higher proportion of insoluble dentin matrix proteins significantly improved cell viability; where a 1:1 ratio of alginate and dentin (1:1 Alg-Dent) was most suitable. We further demonstrate high retention of the soluble dentin molecules within the 1:1 Alg-Dent hydrogel blends, evidencing renewed interactions between these molecules and the dentin matrix post crosslinking. Moreover, at concentrations of 100 μg ml-1, these soluble dentin molecules significantly enhanced odontogenic differentiation of stem cells from the apical papilla encapsulated in bioprinted hydrogels. In summary, the proposed novel bioinks have demonstrable cytocompatibility and natural odontogenic capacity, which can be a used to reproducibly fabricate scaffolds with complex three-dimensional microarchitectures for regenerative dentistry in the future.
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Affiliation(s)
- Avathamsa Athirasala
- Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, OHSU School of Dentistry, Portland, OR, United States of America
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Cell responses to cariogenic microorganisms and dental resin materials—Crosstalk at the dentin-pulp interface? Dent Mater 2017; 33:514-524. [DOI: 10.1016/j.dental.2017.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/13/2017] [Accepted: 02/17/2017] [Indexed: 12/22/2022]
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Regenerative Endodontic Procedures: A Perspective from Stem Cell Niche Biology. J Endod 2017; 43:52-62. [DOI: 10.1016/j.joen.2016.09.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 08/19/2016] [Accepted: 09/09/2016] [Indexed: 12/14/2022]
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Abstract
Regenerative endodontic treatment has yielded excellent clinical outcomes, but only several animal studies have shown the robust regeneration of the pulp-dentin complex. The biological molecules, if properly delivered, can enkindle regeneration of dental pulp and dentin rather than repair with tissues of periodontal origin. This review details the biological significance of regenerating the pulp-dentin complex, the effects of biological cues in pulp regeneration, and the delivery strategies of biological molecules to enhance the outcomes of regenerative endodontic therapy.
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Affiliation(s)
- Sahng G Kim
- Division of Endodontics, College of Dental Medicine, Columbia University, 630 West 168 Street, PH7Stem128, New York, NY 10032, USA.
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