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Belloni A, Argentieri G, Orilisi G, Notarstefano V, Giorgini E, D'Addazio G, Orsini G, Caputi S, Sinjari B. New insights on collagen structural organization and spatial distribution around dental implants: a comparison between machined and laser-treated surfaces. J Transl Med 2024; 22:120. [PMID: 38297308 PMCID: PMC10829267 DOI: 10.1186/s12967-024-04906-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 01/18/2024] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND One of the main factors for the osseointegration of dental implants is the development of an adequate soft tissue barrier, mainly composed by collagen, which protects the implant from bacterial development. The structural features of the peri-implant collagen are influenced by the implant components and, in particular, by the type of the surface. In the clinical practice, healing abutments are characterized by smooth surfaces, named machined. Recently, a new laser technique, Synthegra, has been developed to obtain a topography-controlled surface with micrometric regular pores that seems reducing the risk of peri-implantitis. Based on this background, this study aims investigating the structural organization and spatial distribution of collagen surrounding healing abutments characterized by laser-treated and machined surfaces. METHODS Gingiva portions surrounding custom-made healing abutments (HA), characterized by alternated laser-treated and machined surfaces, were collected and analyzed by combining Fourier Transform InfraRed Imaging (FTIRI) spectroscopy, a non-invasive and high-resolution bidimensional analytical technique, with histological and multivariate analyses. RESULTS Masson's trichrome staining, specific for collagen, highlighted a massive presence of collagen in all the analyzed samples, evidencing a surface-related spatial distribution. The nature of collagen, investigated by the FTIRI spectroscopy, appeared more abundant close to the laser-treated surface, with a perpendicular disposition of the bundles respect to the HA; conversely, a parallel distribution was observed around the machined surface. A different secondary structure was also found, with a higher amount of triple helices and a lower quantity of random coils in collagen close to the laser treated surfaces. CONCLUSIONS FTIRI spectroscopy demonstrates that the use of a laser treated transmucosal surface can improve the morphological organization of the peri-implant collagen, which presents a distribution more similar to that of natural teeth. TRIAL REGISTRATION This trial is registered with ClinicalTrials.gov Identifier: (Registration Number: NCT05754970). Registered 06/03/2023, retrospectively registered, https://clinicaltrials.gov/show/NCT05754970 .
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Affiliation(s)
- Alessia Belloni
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Giulio Argentieri
- Electron Microscopy Laboratory, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Giulia Orilisi
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy
| | - Valentina Notarstefano
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Elisabetta Giorgini
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Gianmaria D'Addazio
- Electron Microscopy Laboratory, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Giovanna Orsini
- Department of Clinical Sciences and Stomatology, Polytechnic University of Marche, Ancona, Italy.
| | - Sergio Caputi
- Electron Microscopy Laboratory, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
| | - Bruna Sinjari
- Electron Microscopy Laboratory, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" Chieti-Pescara, Chieti, Italy
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Wang C, Wang X, Lu R, Cao X, Yuan D, Chen S. Influence of surface nanotopography and wettability on early phases of peri-implant soft tissue healing: an in-vivo study in dogs. BMC Oral Health 2023; 23:651. [PMID: 37684664 PMCID: PMC10492342 DOI: 10.1186/s12903-023-03347-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
BACKGROUND It is well established that nanotopography and wettability of implant surfaces contribute to osseointegration and long-term implant success. However, the effects of a hydrogenated surface with nanotubular and superhydrophilic properties on peri-implant soft tissue remain unclear. This study was designed to study the impact of a modified abutment surface on early soft tissue integration compared with a machined surface. METHODS Thirty-six implants were placed at the bone level in the bilateral mandible of six beagles, followed by healing abutments belonging to the standard machined Ti-6Al-4V alloy abutments (TC4-M), anodized abutments with nanotubes (TC4-Nano), and hydrogenated abutments (TC4-H/Nano) groups, which were randomly screwed to the implants. After two and four weeks of wound healing, the animals were euthanized for histological evaluation. RESULTS A superhydrophilic nanotubular surface developed on the hydrogenated abutment. Histological and histometric analyses revealed similar peri-implant soft tissue healing and dimensions for the three types of abutments at two and four weeks. Connective tissue (CT) length was longer around TC4-H/Nano abutments compared with standard abutments; however, the differences were not statistically significant. Moreover, collagen fibers in the TC4-H/Nano group extended and were attached perpendicularly to the superhydrophilic surface. CONCLUSIONS Our results revealed that the soft tissue interface adjacent to the hydrogenated abutment is comparable to that of the machined abutment. A tendency of increased CT length and perpendicular collagen fibers was observed around the modified abutment. This study suggests that nanotubular/superhydrophilic surfaces could be a promising modification to enhance soft tissue sealing. However, comprehensive studies should be conducted to evaluate the peri-implant soft tissue around the modified abutment immunohistochemically, histopathologically, and clinically.
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Affiliation(s)
- Caiyun Wang
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China
| | - Xin Wang
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China
| | - Ran Lu
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China
| | - Xu Cao
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China
| | - Dingxiang Yuan
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China
| | - Su Chen
- Laboratory of Biomaterials and Biomechanics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing Stomatological Hospital, Capital Medical University, Beijing, 100050, China.
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Gaggi G, Di Credico A, D'Addazio G, Ghinassi B, Argentieri G, Caputi S, Di Baldassarre A, Sinjari B. Impact on peri-implant connective tissue of laser treated versus traditional healing abutments: a human clinical trials. BMC Oral Health 2023; 23:425. [PMID: 37370064 DOI: 10.1186/s12903-023-03148-y] [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: 03/27/2023] [Accepted: 06/20/2023] [Indexed: 06/29/2023] Open
Abstract
BACKGROUND Dental implant is the principal treatment for edentulism and the healthiness of the peri-implant tissue has a pivotal role for its longterm success. In addition, it has been shown that also the topography of the healing abutment can influence the outcome of the restoration. The objective of this human clinical trial was to assess the impact of a novel laser-treated healing abutment on peri-implant connective tissue and extracellular matrix proteins compared to the conventional machined surface, which served as the control group. METHODS During second surgical stage a customized healing abutment were inserted on 30 single dental implants. Healing abutments were realized with two alternated different surface (two side laser-treated surfaces and two side machined surfaces) in order to be considered both as test and control on the same implant and reduce positioning bias. Following the soft tissue healing period (30 ± 7 days) a 5 mm circular biopsy was retrieved. Immuno-histochemical and quantitative real-time PCR (qPCR) analyses were performed on Collagen, Tenascin C, Fibrillin I, Metalloproteinases (MMPs) and their inhibitor (TIMPs). 15 were processed for qPCR, while the other 15 were processed for immunohistochemical analysis. Paired t-test between the two groups were performed. A value of p < 0.05 was considered statistically significant. RESULTS Results revealed that the connective tissue facing the laser-treated surface expressed statistically significant lower amount of MMPs (p < 0.05) and higher level of TIMPs 3 (p < 0.05), compared to the tissue surrounding the machined implant, which, in turn expressed also altered level of extracellular matrix protein (Tenascin C, Fibrillin I (p < 0.05)) and Collagen V, that are known to be altered also in peri-implantitis. CONCLUSIONS In conclusion, the laser-treated surface holds promise in positively influencing wound healing of peri-implant connective tissue. Results demonstrated that topographic nature of the healing abutments can positively influence mucosal wound healing and molecular expression. Previous studies have been demonstrated how laser treatment can rightly influence integrity and functionality of the gingiva epithelium and cell adhesion. Regarding connective tissue different molecular expression demonstrated a different inflammatory pattern between laser treated or machined surfaces where laser treated showed better response. Targeted interventions and preventive measures on peri- implant topography could effectively minimize the risk of peri-implant diseases contributing to the long-term success and durability of restoration. However, new studies are mandatory to better understand this phenomenon and the role of this surface in the peri-implantitis process. TRIAL REGISTRATION: This trial is registered with ClinicalTrials.gov Identifier: (Registration Number: NCT05754970 ). Registered 06/03/2023, retrospectively registered.
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Affiliation(s)
- Giulia Gaggi
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University "G.d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Andrea Di Credico
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University "G.d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Gianmaria D'Addazio
- Unit of Prosthodontics, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
- Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Barbara Ghinassi
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University "G.d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Giulio Argentieri
- Unit of Prosthodontics, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
- Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Sergio Caputi
- Unit of Prosthodontics, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
- Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
| | - Angela Di Baldassarre
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University "G.d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy.
| | - Bruna Sinjari
- Unit of Prosthodontics, Department of Innovative Technologies in Medicine and Dentistry, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
- Electron Microscopy Laboratory, University "G. d'Annunzio" of Chieti-Pescara, 66100, Chieti, Italy
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Rajesh Kumar DT, Mahalaxmi U, MM R, Bhatt DD. Optimization enabled deep residual neural network for motor imagery EEG signal classification. Biomed Signal Process Control 2023. [DOI: 10.1016/j.bspc.2022.104317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Maleki Dizaj S, Torab A, Kouhkani S, Sharifi S, Negahdari R, Bohlouli S, Fattahi S, Salatin S. Gelatin-Curcumin Nanocomposites as a Coating for Implant Healing Abutment: In Vitro Stability Investigation. Clin Pract 2023; 13:88-101. [PMID: 36648849 PMCID: PMC9844414 DOI: 10.3390/clinpract13010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/13/2023] Open
Abstract
Regarding the importance of preventing peri-implantitis in dental implants, the current study aimed to coat a healing abutment with gelatin−curcumin nanocomposites, and the stability of this coating on the healing abutment was evaluated. A cell viability measuring test was used to determine the cytotoxicity of nanocomposites against dental pulp stem cells. To show the pattern of curcumin release from nanocomposites, drug dissolution apparatus two was applied. Then, 16 healing abutments were examined in vitro. Titanium healing abutments were coated with the gelatin−curcumin nanocomposite. The dip coating method was applied for coating and the consistency of coated cases was evaluated at intervals of one, 30, and 60 days after coating inside the simulated body fluid (SBF) solution. A scanning electron microscope (SEM) was used for investigating the microstructure and morphology of coatings, and an energy dispersive X-ray (EDX) was applied for determining the combination of the coating. Moreover, the healings were weighed before and after coating via an accurate digital scale with an accuracy of 0.0001. Finally, the data were analyzed using SPSS software. The prepared nanocomposite was non-cytotoxic against tested cells. The nanocomposite showed a relatively rapid release pattern in the first 10 days for curcumin. The release of curcumin from the nanoparticles continued slowly until the 30th day. The weight changes were statistically significant (p-value < 0.001) during this time. Based on the post hoc test, the weight between two times immediately after coating and 30 days after coating, and also one day after coating and 30 days after coating, was statistically insignificant. The results revealed that the coating of the gelatin−curcumin nanocomposite on the healing was successful and this consistency was kept for at least one month. It is necessary to investigate more evaluations in different fields of physicochemical, mechanical, and antimicrobial aspects for coated healing abutments.
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Affiliation(s)
- Solmaz Maleki Dizaj
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz 5166-15731, Iran
| | - Ali Torab
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz 51368, Iran
| | - Shadi Kouhkani
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz 51368, Iran
| | - Simin Sharifi
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz 5166-15731, Iran
| | - Ramin Negahdari
- Department of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz 51368, Iran
- Correspondence:
| | - Sepideh Bohlouli
- Department of Oral Medicine, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz 51548-53431, Iran
| | - Shirin Fattahi
- Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz 5166-15731, Iran
| | - Sara Salatin
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz 5166-15731, Iran
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Alsharif SB, Wali R, Vanyo ST, Andreana S, Chen K, Sheth B, Swihart MT, Dziak R, Visser MB. Strontium-loaded hydrogel scaffolds to promote gingival fibroblast function. J Biomed Mater Res A 2023; 111:6-14. [PMID: 36054416 DOI: 10.1002/jbm.a.37439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 07/20/2022] [Accepted: 08/05/2022] [Indexed: 11/07/2022]
Abstract
Dental implant clinical success is dependent on effective peri-implant tissue attachment to the trans-mucosal portion following placement. Modification of transmucosal implant surfaces can improve cellular adhesion and function leading to formation of an effective soft-tissue seal during healing, of which gingival fibroblasts are prominent cells to migrate to repair wounds and crucial for the development of a collagen rich connective tissue. Biocompatible loaded scaffold materials have been developed to allow local release of molecules with effective biological activity. Our previous studies indicate that strontium can promote gingival fibroblast metabolism, decrease apoptosis and support adhesion to titanium healing abutments. In this study, we developed a strontium-loaded alginate hydrogel scaffold which can be easily personalized to fit over any size and shape of implant transmucosal collar or healing abutment. Results indicate that biologically active strontium ions are effectively released from loaded alginate hydrogel material to promote fibroblast viability and migration to repair in vitro wounds similar to that of strontium citrate solution. Overall, this novel strontium-loaded alginate scaffold device displays good biocompatibility and functionality, demonstrating high potential as a system to provide local delivery of strontium to improve peri-implant mucosal healing following implant placement and clinical success.
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Affiliation(s)
- Shahad Bakheet Alsharif
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, New York, USA.,Department of Periodontology, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Rofida Wali
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, New York, USA.,College of Dentistry, Umm Al-Qura University, Meca, Saudi Arabia
| | - Stephen T Vanyo
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Sebastiano Andreana
- Department of Restorative Dentistry, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Kaiwen Chen
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Bhoomika Sheth
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Mark T Swihart
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Rosemary Dziak
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, New York, USA
| | - Michelle B Visser
- Department of Oral Biology, University at Buffalo, The State University of New York, Buffalo, New York, USA
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Traditional Removable Partial Dentures versus Implant-Supported Removable Partial Dentures: A Retrospective, Observational Oral Health-Related Quality-of-Life Study. PROSTHESIS 2021. [DOI: 10.3390/prosthesis3040032] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Removable partial dentures (RPD) are still a valid alternative for the restoration of missing teeth. Additionally, implant-supported removable partial dentures (ISRPD) represent a valid alternative as it allows to avoid the use of clasps and increase stability. The objective of this study was to evaluate through an OHIP-14 questionnaire the level of satisfaction and quality of life (QoL) of patients treated before RPD and then with ISRPD. Twenty patients were rehabilitated with traditional RPDs, and after one year the prosthesis was modified into ISRPD, by inserting an implant and a ball or locator attachment. At the end of both phases, patients completed the Oral Health Impact Profile (OHIP-14) questionnaire. The collected data were statistically analyzed through the Wilcoxon U test, as overall OHIP score and difference between treatments. The mean of the OHIP summary (range from 0 to 56) in the RPD Group was 20.95 (±5.27). In the ISRPD Group it was 13.95 (±3.91), with a statistically significant difference (p < 0.05) between the two Groups. The same findings were highlighted for the differences between groups in every domain question. Patients showed significant improvements after rehabilitation in all areas of investigation, stating how the transformation of a removable prosthesis into an implant-supported one can improve patients’ QoL with benefits in chewing ability, aesthetics and self-satisfaction.
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D’Addazio G, Sinjari B, Arcuri L, Femminella B, Murmura G, Santilli M, Caputi S. Mechanical Pull-Out Test of a New Hybrid Fixture-Abutment Connection: An In Vitro Study. MATERIALS 2021; 14:ma14061555. [PMID: 33810040 PMCID: PMC8004755 DOI: 10.3390/ma14061555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/06/2021] [Accepted: 03/18/2021] [Indexed: 11/16/2022]
Abstract
Implant abutment connection was described among the main causes of peri-implant bone resorption. The aim of this in vitro study was to test the coupling capacity, the surface modification of a new hybrid connection and the influence of repeated connection activations caused during the main clinical and laboratory phases. A total of 40 implant-abutment screw retained systems with 10°-conical and internal hexagon connection were tested. The connection was screwed, fixed to the universal test machine, removed the screw and a pull-out test was performed. Test was repeated five times in succession. Also Scanning Electron Microscopy (SEM) was used to detect microscopically surface modification. Analysis of variance and Tukey tests were used for the statistical analysis. Pull-out test reveals a mean value of 131.35 ± 16.52 Newton Centimeter (N·cm). For each single activation, results from first to fifth were: 113.9 ± 13.02, 126.1 ± 12.81, 138.11 ± 15.15, 138.8 ± 11.90 and 140 ± 12.99 N·cm. A statistically significant difference between the measurements and an increase in the removal force was shown. The collected data supports the use of this new type of connection, resulting in a very strong interface between implant and abutment. Also, repeated activation of connection can promote a better coupling of the implant-abutment interface.
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Affiliation(s)
- Gianmaria D’Addazio
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
| | - Bruna Sinjari
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
- Correspondence: ; Tel.: +393-922-7471479; Fax: +390-8713-554070
| | - Lorenzo Arcuri
- Department of Oral and Maxillo-Facial Sciences, “Sapienza”, University of Rome, 00185 Rome, Italy;
| | - Beatrice Femminella
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
| | - Giovanna Murmura
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
| | - Manlio Santilli
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
| | - Sergio Caputi
- Department of Innovative Technologies in Medicine and Dentistry, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (B.F.); (G.M.); (M.S.); (S.C.)
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Gaggi G, Di Credico A, Izzicupo P, Alviano F, Di Mauro M, Di Baldassarre A, Ghinassi B. Human Mesenchymal Stromal Cells Unveil an Unexpected Differentiation Potential toward the Dopaminergic Neuronal Lineage. Int J Mol Sci 2020; 21:ijms21186589. [PMID: 32916865 PMCID: PMC7555006 DOI: 10.3390/ijms21186589] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 08/29/2020] [Accepted: 09/08/2020] [Indexed: 12/12/2022] Open
Abstract
Degeneration of dopaminergic neurons represents the cause of many neurodegenerative diseases, with increasing incidence worldwide. The replacement of dead cells with new healthy ones may represent an appealing therapeutic approach to these pathologies, but currently, only pluripotent stem cells can generate dopaminergic neurons with high efficiency. However, with the use of these cells arises safety and/or ethical issues. Human mesenchymal stromal cells (hFM-MSCs) are perinatal stem cells that can be easily isolated from the amniochorionic membrane after delivery. Generally considered multipotent, their real differentiative potential is not completely elucidated. The aim of this study was to analyze their stemness characteristics and to evaluate whether they may overcome their mesenchymal fate, generating dopaminergic neurons. We demonstrated that hFM-MSCs expressed embryonal genes OCT4, NANOG, SOX2, KLF4, OVOL1, and ESG1, suggesting they have some features of pluripotency. Moreover, hFM-MSCs that underwent a dopaminergic differentiation protocol gradually increased the transcription of dopaminergic markers LMX1b, NURR1, PITX3, and DAT. We finally obtained a homogeneous population of cells resembling the morphology of primary midbrain dopaminergic neurons that expressed the functional dopaminergic markers TH, DAT, and Nurr1. In conclusion, our results suggested that hFM-MSCs retain the expression of pluripotency genes and are able to differentiate not only into mesodermal cells, but also into neuroectodermal dopaminergic neuron-like cells.
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Affiliation(s)
- Giulia Gaggi
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University “G. D’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.G.); (A.D.C.); (P.I.); (B.G.)
| | - Andrea Di Credico
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University “G. D’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.G.); (A.D.C.); (P.I.); (B.G.)
| | - Pascal Izzicupo
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University “G. D’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.G.); (A.D.C.); (P.I.); (B.G.)
| | - Francesco Alviano
- Department of Experimental Diagnostic and Speciality Medicine, Unit of Histology, Embriology and Applied Biology, University of Bologna, 40126 Bologna, Italy;
| | - Michele Di Mauro
- Cardio-Thoracic Surgery Unit, Heart and Vascular Centre, Maastricht University Medical Centre (MUMC), Cardiovascular Research Institute Maastricht (CARIM), 6202 Maastricht, The Netherlands;
| | - Angela Di Baldassarre
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University “G. D’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.G.); (A.D.C.); (P.I.); (B.G.)
- Correspondence:
| | - Barbara Ghinassi
- Human Anatomy and Cell Differentiation Lab, Department of Medicine and Aging Sciences, University “G. D’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.G.); (A.D.C.); (P.I.); (B.G.)
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Ghinassi B, Di Baldassarre A, D’Addazio G, Traini T, Andrisani M, Di Vincenzo G, Gaggi G, Piattelli M, Caputi S, Sinjari B. Gingival Response to Dental Implant: Comparison Study on the Effects of New Nanopored Laser-Treated vs. Traditional Healing Abutments. Int J Mol Sci 2020; 21:ijms21176056. [PMID: 32842709 PMCID: PMC7504205 DOI: 10.3390/ijms21176056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/14/2020] [Accepted: 08/21/2020] [Indexed: 12/15/2022] Open
Abstract
The health of peri-implant soft tissues is important for the long-term success rate of dental implants and the surface topography is pivotal in influencing it. Thus, the aim of this study was to evaluate, in human patients, the inflammatory mucosal microenvironment in the tissue surrounding a new, nanoscale, laser-treated healing abutment characterized by engineered nanopores versus a standard machined-surface. Analyses of anti- and pro-inflammatory markers, cytokeratins, desmosomal proteins and scanning electron microscopy were performed in 30 soft-tissue biopsies retrieved during second-stage surgery. The results demonstrate that the soft tissue surrounding the laser-treated surface was characterized by a lower grade of inflammation than the one facing the machined-surface, which, in turn, showed a disrupted epithelium and altered desmosomes. Moreover, higher adhesion of the epithelial cells on the laser-treated surface was detected compared to the machined one. In conclusion, the laser-treated surface topography seems to play an important role not only in cell adhesion, but also on the inflammatory makers’ expression of the soft tissue microenvironment. Thus, from a clinical point of view, the use of this kind of topography may be of crucial importance not only on healing abutments but also on prosthetic ones.
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Affiliation(s)
- Barbara Ghinassi
- Human Anatomy and Cell Differentation Lab, Department of Medicine and Aging Sciences, University “G.d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy;
- Correspondence: (B.G.); (A.D.B.)
| | - Angela Di Baldassarre
- Human Anatomy and Cell Differentation Lab, Department of Medicine and Aging Sciences, University “G.d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy;
- Correspondence: (B.G.); (A.D.B.)
| | - Gianmaria D’Addazio
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
- Electron Microscopy Laboratory, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
| | - Tonino Traini
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
- Electron Microscopy Laboratory, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
| | - Mauro Andrisani
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
| | - Giorgio Di Vincenzo
- Department of Periodontics & Implant Dentistry, New York University, E 40th St #508, New York, NY 10016, USA;
| | - Giulia Gaggi
- Human Anatomy and Cell Differentation Lab, Department of Medicine and Aging Sciences, University “G.d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy;
| | - Maurizio Piattelli
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
| | - Sergio Caputi
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
- Electron Microscopy Laboratory, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
| | - Bruna Sinjari
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (G.D.); (T.T.); (M.A.); (M.P.); (S.C.); (B.S.)
- Electron Microscopy Laboratory, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy
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Epigenetic Features of Human Perinatal Stem Cells Redefine Their Stemness Potential. Cells 2020; 9:cells9051304. [PMID: 32456308 PMCID: PMC7290760 DOI: 10.3390/cells9051304] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 02/06/2023] Open
Abstract
Human perinatal stem cells (SCs) can be isolated from fetal annexes without ethical or safety limitations. They are generally considered multipotent; nevertheless, their biological characteristics are still not fully understood. The aim of this study was to investigate the pluripotency potential of human perinatal SCs as compared to human induced pluripotent stem cells (hiPSCs). Despite the low expression of the pluripotent factors NANOG, OCT4, SOX2, and C-KIT in perinatal SC, we observed minor differences in the promoters DNA-methylation profile of these genes with respect to hiPSCs; we also demonstrated that in perinatal SCs miR-145-5p had an inverse trend in comparison to these stemness markers, suggesting that NANOG, OCT4, and SOX2 were regulated at the post-transcriptional level. The reduced expression of stemness markers was also associated with shorter telomere lengths and shift of the oxidative metabolism between hiPSCs and fetal annex-derived cells. Our findings indicate the differentiation ability of perinatal SCs might not be restricted to the mesenchymal lineage due to an epigenetic barrier, but other regulatory mechanisms such as telomere shortening or metabolic changes might impair their differentiation potential and challenge their clinical application.
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12
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Sinjari B, D’Addazio G, Santilli M, D’Avanzo B, Rexhepi I, Scarano A, Traini T, Piattelli M, Caputi S. A 4 Year Human, Randomized, Radiographic Study of Scalloped versus Non-Scalloped Cemented Implants. MATERIALS 2020; 13:ma13092190. [PMID: 32397597 PMCID: PMC7254311 DOI: 10.3390/ma13092190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 05/03/2020] [Accepted: 05/06/2020] [Indexed: 12/13/2022]
Abstract
Marginal bone loss (MBL) is a key factor in long-term implant success rate. Among the different factors that influence MBL, it is the different implant shoulder designs, such as scalloped or non-scalloped, which have been widely studied on screw retained but not on cemented retained implants. Thus, the aim of the present study was to evaluate the MBL around scalloped and non-scalloped cemented retained dental implants after 4 years of loading, in humans. A total of 15 patients were enrolled in the present study. A radiographic and clinical examination was performed after implant placement (T0) and after 4 years from it (T1). The results demonstrated a differential MBL (T1-T0) of 2.436 ± 1.103 mm and 1.923 ± 1.021 mm, respectively for test (scalloped) and control (non-scalloped) groups with a statistically significant difference between them. On the other hand, no statistically significant differences were found between the groups in terms of prosthetic complication and abutment decementation, whilst ceramic crowns chipping was shown in both groups. In conclusion, the use of a scalloped platform did not provide better results on the maintenance of MBL after 4 years follow-up. In this study, this probably was determined by multiple factors, among which was the subcrestal insertion of scalloped implants.
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Affiliation(s)
- Bruna Sinjari
- Correspondence: ; Tel.: +39-392-27471479; Fax: +39-0871-3554070
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