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Yun J, Lee J, Kim S, Koo KT, Seol YJ, Lee YM. The effect of hard-type crosslinked hyaluronic acid with particulate bone substitute on bone regeneration: positive or negative? J Periodontal Implant Sci 2022; 52:312-324. [PMID: 36047584 PMCID: PMC9436643 DOI: 10.5051/jpis.2104700235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/19/2021] [Accepted: 01/24/2022] [Indexed: 11/08/2022] Open
Abstract
Purpose Methods Results Conclusions
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Affiliation(s)
- Junseob Yun
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jungwon Lee
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
- One-Stop Specialty Center, Seoul National University Dental Hospital, Seoul, Korea
| | - Sungtae Kim
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Ki-Tae Koo
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Yang-Jo Seol
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Yong-Moo Lee
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
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Yang J, Liang J, Zhu Y, Hu M, Deng L, Cui W, Xu X. Fullerol-hydrogel microfluidic spheres for in situ redox regulation of stem cell fate and refractory bone healing. Bioact Mater 2021; 6:4801-4815. [PMID: 34095630 PMCID: PMC8144672 DOI: 10.1016/j.bioactmat.2021.05.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 12/18/2022] Open
Abstract
The balance of redox homeostasis is key to stem cell maintenance and differentiation. However, this balance is disrupted by the overproduced reactive oxygen species (ROS) in pathological conditions, which seriously impair the therapeutic efficacy of stem cells. In the present study, highly dispersed fullerol nanocrystals with enhanced bioreactivity were incorporated into hydrogel microspheres using one-step innovative microfluidic technology to construct fullerol-hydrogel microfluidic spheres (FMSs) for in situ regulating the redox homeostasis of stem cells and promoting refractory bone healing. It was demonstrated that FMSs exhibited excellent antioxidant activity to quench both intracellular and extracellular ROS, sparing stem cells from oxidative stress damage. Furthermore, these could effectively promote the osteogenic differentiation of stem cells with the activation of FoxO1 signaling, indicating the intrinsically osteogenic property of FMSs. By injecting the stem cells-laden FMSs into rat calvarial defects, the formation of new bone was remarkably reinforced, which is a positive synergic effect from modulating the ROS microenvironment and enhancing the osteogenesis of stem cells. Collectively, the antioxidative FMSs, as injectable stem cell carriers, hold enormous promise for refractory bone healing, which can also be expanded to deliver a variety of other cells, targeting diseases that require in situ redox regulation.
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Affiliation(s)
- Jielai Yang
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Jing Liang
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Yuan Zhu
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Mu Hu
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Lianfu Deng
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Wenguo Cui
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
| | - Xiangyang Xu
- Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin 2nd Road, Shanghai, 200025, PR China
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Yun J, Lee J, Ha CW, Park SJ, Kim S, Koo KT, Seol YJ, Lee YM. The effect of 3-D printed polylactic acid scaffold with and without hyaluronic acid on bone regeneration. J Periodontol 2021; 93:1072-1082. [PMID: 34773704 DOI: 10.1002/jper.21-0428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/18/2021] [Accepted: 09/20/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Three- dimensional (3D) technology has been suggested to overcome these limitations in guided bone regeneration (GBR) procedures because 3D-printed scaffolds can be easily molded to patient-specific bone defect site. This study aimed to investigate the effect of 3-D printed polylactic acid (PLA) scaffolds with or without hyaluronic acid (HA) in a rabbit calvaria model. METHODS A calvaria defect with a diameter of 15 mm was created in 30 New Zealand white rabbits. The rabbits were randomly allocated into 3 groups including no graft group (control, n = 10) , 3D printed PLA graft group (3D-PLA, n = 10) , and 3D printed PLA with hyaluronic acid graft group (3D-PLA/HA, n = 10) . Five animals in each group were sacrificed at 4 and 12 weeks after surgery. Microcomputed tomography and histologic and histomorphometric analyses were performed. RESULTS Over the whole examination period, no significant adverse reactions were observed. There were no statistically significant differences in bone volume (BV) /tissue volume (TV) among the three groups at 4 weeks. However, the highest BV/TV was observed in the 3D-PLA/HA group at 12 weeks. The new bone area for control, 3D-PLA, and 3D-PLA/HA showed no statistical differences at 4 weeks. However, the value was significantly higher in the 3D-PLA and 3D-PLA/HA groups compared to the control group at 12 weeks. CONCLUSION The 3D printed PLA scaffolds was biocompatible and integrated well with bone defect margin. They were also provided the proper space for new bone formation. Therefore, 3D printed PLA/HA might be a potential tool to enhance bone augmentation. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Junseob Yun
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Jungwon Lee
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.,One-Stop Specialty Center, Seoul National University Dental Hospital, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Cheol Woo Ha
- Advanced Joining and Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 113-58, Seohaean-ro, Siheung-si, Gyeonggi-do, 15014, Republic of Korea
| | - Seong Je Park
- Advanced Joining and Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 113-58, Seohaean-ro, Siheung-si, Gyeonggi-do, 15014, Republic of Korea
| | - Sungtae Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Ki-Tae Koo
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Yang-Jo Seol
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Yong-Moo Lee
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University, 101, Daehak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
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Valencia-Llano CH, Solano MA, Grande-Tovar CD. Nanocomposites of Chitosan/Graphene Oxide/Titanium Dioxide Nanoparticles/Blackberry Waste Extract as Potential Bone Substitutes. Polymers (Basel) 2021; 13:polym13223877. [PMID: 34833175 PMCID: PMC8618967 DOI: 10.3390/polym13223877] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/04/2021] [Accepted: 11/08/2021] [Indexed: 12/28/2022] Open
Abstract
New technologies based on nanocomposites of biopolymers and nanoparticles inspired by the nature of bone structure have accelerated their application in regenerative medicine, thanks to the introduction of reinforcing properties. Our research incorporated chitosan (CS) covalently crosslinked with glutaraldehyde (GLA) beads with graphene oxide (GO) nanosheets, titanium dioxide nanoparticles (TiO2), and blackberry processing waste extract (BBE) and evaluated them as partial bone substitutes. Skullbone defects in biomodels filled with the scaffolds showed evidence through light microscopy, scanning electron microscopy, histological studies, soft tissue development with hair recovery, and absence of necrotic areas or aggressive infectious response of the immune system after 90 days of implantation. More interestingly, newly formed bone was evidenced by elemental analysis and Masson trichromacy analysis, which demonstrated a possible osteoinductive effect from the beads using the critical size defect experimental design in the biomodels. The results of this research are auspicious for the development of bone substitutes and evidence that the technologies for tissue regeneration, including chitosan nanocomposites, are beneficial for the adhesion and proliferation of bone cells.
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Affiliation(s)
| | - Moisés A. Solano
- Grupo de Investigación de Fotoquímica y Fotobiología, Facultad de Ciencias, Programa de Química, Universidad del Atlántico, Carrera 30 Número 8-49, Puerto Colombia 081008, Colombia;
| | - Carlos David Grande-Tovar
- Grupo de Investigación de Fotoquímica y Fotobiología, Facultad de Ciencias, Programa de Química, Universidad del Atlántico, Carrera 30 Número 8-49, Puerto Colombia 081008, Colombia;
- Correspondence: ; Tel.: +57-5-3599-484
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Chatzipetros E, Damaskos S, Tosios KI, Christopoulos P, Donta C, Kalogirou EM, Yfanti Z, Tsiourvas D, Papavasiliou A, Tsiklakis K. The effect of nano-hydroxyapatite/chitosan scaffolds on rat calvarial defects for bone regeneration. Int J Implant Dent 2021; 7:40. [PMID: 34027572 PMCID: PMC8141479 DOI: 10.1186/s40729-021-00327-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/18/2021] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND This study aims at determining the biological effect of 75/25 w/w nano-hydroxyapatite/chitosan (nHAp/CS) scaffolds on bone regeneration, in terms of fraction of bone regeneration (FBR), total number of osteocytes (Ost), and osteocyte cell density (CD), as well as its biodegradability. METHODS Two critical-size defects (CSDs) were bilaterally trephined in the parietal bone of 36 adult Sprague-Dawley rats (18 males and 18 females); the left remained empty (group A), while the right CSD was filled with nHAp/CS scaffold (group B). Two female rats died postoperatively. Twelve, 11, and 11 rats were euthanized at 2, 4, and 8 weeks post-surgery, respectively. Subsequently, 34 specimens were resected containing both CSDs. Histological and histomorphometric analyses were performed to determine the FBR, calculated as [the sum of areas of newly formed bone in lateral and central regions of interest (ROIs)]/area of the original defect, as well as the Ost and the CD (Ost/mm2) in each ROI of both groups (A and B). Moreover, biodegradability of the nHAp/CS scaffolds was estimated via the surface area of the biomaterial (BmA) in the 2nd, 4th, and 8th week post-surgery. RESULTS The FBR of group B increased significantly from 2nd to 8th week compared to group A (P = 0.009). Both the mean CD and the mean Ost values of group B increased compared to group A (P = 0.004 and P < 0.05 respectively). Moreover, the mean value of BmA decreased from 2nd to 8th week (P = 0.001). CONCLUSIONS Based on histological and histomorphometric results, we support that 75/25 w/w nHAp/CS scaffolds provide an effective space for new bone formation.
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Affiliation(s)
- Emmanouil Chatzipetros
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece.
| | - Spyros Damaskos
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece
| | - Konstantinos I Tosios
- Department of Oral Medicine and Pathology, Faculty of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Panos Christopoulos
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Catherine Donta
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece
| | - Eleni-Marina Kalogirou
- Department of Oral Medicine and Pathology, Faculty of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Zafeiroula Yfanti
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece
| | - Dimitris Tsiourvas
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Attiki, Greece
| | - Aggeliki Papavasiliou
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", Aghia Paraskevi, Attiki, Greece
| | - Kostas Tsiklakis
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece
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Guo Z, Chen L, Ning Y, Ding X, Gao Y, Zhou L, Xu S, Zhang Z. Split-crest technique with inlay bone block grafts for narrow posterior mandibles: a retrospective clinical study with a 3-year follow-up. Am J Transl Res 2020; 12:4628-4638. [PMID: 32913536 PMCID: PMC7476144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 07/25/2020] [Indexed: 06/11/2023]
Abstract
The use of the split-crest technique (SCT) and bone block grafts provides benefits to horizontal bone augmentation. However, no information is currently available to evaluate the clinical effects of SCT combined with inlay bone block grafts on soft and hard tissues of the narrow posterior mandibles. In this study, 56 healthy patients underwent SCT to augment the alveolar ridge width. Implant placement was performed 3 months after SCT, and the implants were restored 3 months after placement. A planned follow-up was performed to analyze various clinical features, including X-ray radiographs, alveolar ridge width, and keratinized mucosal width, after SCT to evaluate the success of the procedure. The incisions healed well in all patients. The average initial alveolar ridge width was 2.78 ± 0.56 mm, which increased to 6.67 ± 0.60 mm after SCT. Three months later, this width declined slightly to 6.19 ± 0.48 mm. The average initial keratinized mucosal width was 2.83 ± 0.66 mm, which increased to 6.00 ± 0.71 mm 3 months later. Both at 3 months and 1 year after the procedure, vertical bone loss at the buccal sites was 1.32 ± 0.56 mm and 1.94 ± 0.54 mm, respectively. Survival rates of the implants were 100% after 3 years. SCT with inlay bone block grafts was successfully applied to narrow posterior mandibles with efficient augmentation of soft and hard tissue widths. The findings of this study aim to identify future beneficial applications of SCT.
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Affiliation(s)
- Zehong Guo
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Lin Chen
- Department of Endodontics, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Yingyuan Ning
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Xianglong Ding
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Yan Gao
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Lei Zhou
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Shulan Xu
- Center of Oral Implantology, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
| | - Zhaoqiang Zhang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical UniversityGuangzhou, China
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Sosakul T, Tuchpramuk P, Suvannapruk W, Srion A, Rungroungdouyboon B, Suwanprateeb J. Evaluation of tissue ingrowth and reaction of a porous polyethylene block as an onlay bone graft in rabbit posterior mandible. J Periodontal Implant Sci 2020; 50:106-120. [PMID: 32395389 PMCID: PMC7192824 DOI: 10.5051/jpis.2020.50.2.106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 12/22/2019] [Accepted: 02/12/2020] [Indexed: 01/13/2023] Open
Abstract
Purpose A new form of porous polyethylene, characterized by higher porosity and pore interconnectivity, was developed for use as a tissue-integrated implant. This study evaluated the effectiveness of porous polyethylene blocks used as an onlay bone graft in rabbit mandible in terms of tissue reaction, bone ingrowth, fibrovascularization, and graft-bone interfacial integrity. Methods Twelve New Zealand white rabbits were randomized into 3 treatment groups according to the study period (4, 12, or 24 weeks). Cylindrical specimens measuring 5 mm in diameter and 4.5 mm in thickness were placed directly on the body of the mandible without bone bed decortication, fixed in place with a titanium screw, and covered with a collagen membrane. Histologic and histomorphometric analyses were done using hematoxylin and eosin-stained bone slices. Interfacial shear strength was tested to quantify graft-bone interfacial integrity. Results The porous polyethylene graft was observed to integrate with the mandibular bone and exhibited tissue-bridge connections. At all postoperative time points, it was noted that the host tissues had grown deep into the pores of the porous polyethylene in the direction from the interface to the center of the graft. Both fibrovascular tissue and bone were found within the pores, but most bone ingrowth was observed at the graft-mandibular bone interface. Bone ingrowth depth and interfacial shear strength were in the range of 2.76-3.89 mm and 1.11-1.43 MPa, respectively. No significant differences among post-implantation time points were found for tissue ingrowth percentage and interfacial shear strength (P>0.05). Conclusions Within the limits of the study, the present study revealed that the new porous polyethylene did not provoke any adverse systemic reactions. The material promoted fibrovascularization and displayed osteoconductive and osteogenic properties within and outside the contact interface. Stable interfacial integration between the graft and bone also took place.
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Affiliation(s)
- Teerapan Sosakul
- Department of Prosthodontics, Khon Kaen University Faculty of Dentistry, Khon Kaen, Thailand
| | - Pongsatorn Tuchpramuk
- Office of Academic Affairs, Mahasarakham University Faculty of Veterinary Sciences, Maha Sarakham, Thailand
| | - Waraporn Suvannapruk
- Biofunctional Materials and Devices Research Group, National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathumthani, Thailand
| | - Autcharaporn Srion
- Biofunctional Materials and Devices Research Group, National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathumthani, Thailand
| | - Bunyong Rungroungdouyboon
- Department of Mechanical Engineering, Thammasat University Faculty of Engineering, Pathumthani, Thailand
| | - Jintamai Suwanprateeb
- Biofunctional Materials and Devices Research Group, National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathumthani, Thailand
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Imaging of nano-hydroxyapatite/chitosan scaffolds using a cone beam computed tomography device on rat calvarial defects with histological verification. Clin Oral Investig 2019; 24:437-446. [PMID: 31104110 DOI: 10.1007/s00784-019-02939-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 05/02/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Τhis study aims at determining the ability of cone beam computed tomography (CBCT) to visualize critical-size defects (CSD) created at rat calvaria and filled with 75/25 w/w nano-hydroxyapatite/chitosan (nHAp/CS) scaffolds, prior to their histological investigation. MATERIALS AND METHODS Thirty adult Sprague Dawley rats, 15 males and 15 females, were used. Two CSD, 5 mm in diameter, were bilaterally trephined in the parietal bone. The right CSD was filled with nHAp/CS scaffold, while the left CSD remained empty, as the control group. Two female rats died post-operatively. Rats were euthanized at 2, 4, and 8 weeks post-surgery. Twenty-eight specimens (15 × 2 × 10 mm) were resected-containing both CSDs-and then scanned using a NewTom VGi CBCT imaging unit (Verona, Italy). The manufacturer's software trace region profile tool (NNT v6.2, Verona, Italy) was used in selected axial slices. The greyscale value (in VGiHU) and the traced/selected region of interest (ROI, in mm2) of those areas were automatically calculated. Subsequently, all specimens were histologically examined. RESULTS An increased VGiHU (P = 0.000), was observed in the experimental group relative to the control group. The ROI of CSD (in mm2) was significantly reduced (P = 0.001) from the fourth to the eighth week in both groups. No statistically significant difference between male and female rats (P = 0.188) was observed with respect to VGiHU. CONCLUSIONS The nHAp/CS scaffolds are easily visualized using a particular high-resolution CBCT device. CLINICAL RELEVANCE Both the CBCT measurements and also the histological results suggest that the nHAp/CS scaffold presence contributes to new bone formation in rat calvarial CSD.
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Ghezzi B, Lagonegro P, Pece R, Parisi L, Bianchi M, Tatti R, Verucchi R, Attolini G, Quaretti M, Macaluso GM. Osteoblast adhesion and response mediated by terminal -SH group charge surface of SiOxCy nanowires. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:43. [PMID: 30929122 DOI: 10.1007/s10856-019-6241-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Robust cell adhesion is known to be necessary to promote cell colonization of biomaterials and differentiation of progenitors. In this paper, we propose the functionalization of Silicon Oxycarbide (SiOxCy) nanowires (NWs) with 3-mercaptopropyltrimethoxysilane (MPTMS), a molecule containing a terminal -SH group. The aim of this functionalization was to develop a surface capable to adsorb proteins and promote cell adhesion, proliferation and a better deposition of extracellular matrix. This functionalization can be used to anchor other structures such as nanoparticles, proteins or aptamers. It was observed that surface functionalization markedly affected the pattern of protein adsorption, as well as the in vitro proliferation of murine osteoblastic cells MC3T3-E1, which was increased on functionalized nanowires (MPTMS-NWs) compared to bare NWs (control) (p < 0.0001) after 48 h. The cells showed a better adhesion on MPTMS-NWs than on bare NWs, as confirmed by immunofluorescence studies on the cytoskeleton, which showed a more homogeneous vinculin distribution. Gene expression analysis showed higher expression levels for alkaline phosphatase and collagen I, putative markers of the osteoblast initial differentiation stage. These results suggest that functionalization of SiOxCy nanowires with MPTMS enhances cell growth and the expression of an osteoblastic phenotype, providing a promising strategy to improve the biocompatibility of SiOxCy nanowires for biomedical applications.
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Affiliation(s)
- Benedetta Ghezzi
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- Dipartimento di Medicina e Chirurgia, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Paola Lagonegro
- ISMAC-CNR, Institute for macromolecular studies, Via Corti, 12, 20133, Milano, Italy.
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124, Parma, Italy.
| | - Roberta Pece
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- Dipartimento di Medicina e Chirurgia, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- School of Medicine, University of Genoa, DIMES, L.go R. Benzi 10, Genoa, 16131, Italy
| | - Ludovica Parisi
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- Dipartimento di Medicina e Chirurgia, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Massimiliano Bianchi
- Dipartimento di Medicina e Chirurgia, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Roberta Tatti
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Trento unit, Via alla Cascata, 56/C, 38123, Trento, Italy
| | - Roberto Verucchi
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Trento unit, Via alla Cascata, 56/C, 38123, Trento, Italy
| | - Giovanni Attolini
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124, Parma, Italy
| | - Martina Quaretti
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124, Parma, Italy
| | - Guido M Macaluso
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- Dipartimento di Medicina e Chirurgia, University of Parma, Via Gramsci 14, 43126, Parma, Italy
- ISMAC-CNR, Institute for macromolecular studies, Via Corti, 12, 20133, Milano, Italy
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Reconstruction of Secondary Calvarial Defects with Ex Situ Split Calvarial Bone Grafts. Plast Reconstr Surg 2019; 143:223-233. [DOI: 10.1097/prs.0000000000005129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chatzipetros E, Christopoulos P, Donta C, Tosios KI, Tsiambas E, Tsiourvas D, Kalogirou EM, Tsiklakis K. Application of nano-hydroxyapatite/chitosan scaffolds on rat calvarial critical-sized defects: A pilot study. Med Oral Patol Oral Cir Bucal 2018; 23:e625-e632. [PMID: 30148464 PMCID: PMC6167094 DOI: 10.4317/medoral.22455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 07/08/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND The purpose of this pilot study was to evaluate for the first time the effect of 75/25 w/w nano-Hydroxyapatite/Chitosan (nHAp/CS) scaffolds on Guided Bone Regeneration (GBR) in rat calvarial critical-sized defects (CSDs). MATERIAL AND METHODS Six adult Sprague Dawley rats, 3 males and 3 females, were used. Two CSDs, full thickness and 5mm in diameter, were trephined in both sides of the parietal bone. The right CSD was filled with nHAp/CS scaffold, while the left CSD remained empty, as the control group. The wound was sutured in layers. Rats were euthanized with diethyl ether inhalation at 2, 4 and 8 weeks after surgical procedure. Histological and histomorphometric analysis was performed within distinct regions of interest (ROI): the lateral area inward of the middle sagittal seam; the lateral area outward of the middle sagittal seam and the central area. RESULTS The mean surface of newly formed bone (in μm2) in the lateral area inward of the middle sagittal seam of all rats was significantly higher (P=0.039) in the experimental group (91733.00±38855.60) than the control group (46762.17±25507.97). The NOex-c, defined as total number of osteocytes (OST) in newly formed bone surface in experimental group [experimental OST] minus the total number of osteocytes in newly formed bone surface in control group [control OST], was significantly greater (P=0.029) at 4th week post-surgery. Within the experimental group, a statistically significant increase (P=0.042) in the surface of newly formed bone was noticed in rats euthanized in 4th week compared with rats euthanized in 2nd week after surgery in the lateral area inward of the middle sagittal seam. CONCLUSIONS The results of this study suggest that 75/25 w/w nHAp/CS scaffolds should be considered as a suitable biomaterial for GBR.
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Affiliation(s)
- E Chatzipetros
- Department of Oral Diagnosis and Radiology, Faculty of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str, 11527, Goudi, Athens, Greece,
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Ghiacci G, Graiani G, Cacchioli A, Galli C, Lumetti S, Ravanetti F, Elviri L, Manfredi E, Macaluso GM, Sala R. Stanozolol-soaked grafts enhance new bone formation in rat calvarial critical-size defects. ACTA ACUST UNITED AC 2017; 12:045016. [PMID: 28746051 DOI: 10.1088/1748-605x/aa71bc] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Androgen hormones play a significant role in regulating bone morphogenesis and in maintaining bone homeostasis throughout life. This study aimed to investigate the local effects of the non-aromatizable androgen stanozolol (ST) on bone regeneration in rats. Bilateral critical-size defects were created in the parietal bone of 26 male Wistar rats: the defect on one side was filled with a deproteinized bovine bone scaffold (DBB) soaked in ST solution (test) and the contralateral with DBB alone (control). Samples were collected at one month and three months. Histomorphometry revealed a significantly higher new bone formation (NB) (24.41% ± 4.14% versus 15.01% ± 2.43%, p < 0.05) and mineral apposition rate (MAR) (9.20 μm/day ± 0.37 versus 6.50 μm/day ± 1.09, p < 0.05) in the test versus control group at one month. Accordingly, real time-polymerase chain reaction revealed a consistently higher Runx2 expression in test samples (fold change test/control: 4.50 ± 1.17, p ≤ 0.05). No morphometrical differences between groups were detected at three months (p > 0.05). However, test samples were characterized by an increase in blood capillary density from one month (11.43 n mm-2 ± 2.01) to three months (28.26 n mm-2 ± 5.62), providing evidence of a vital remodeling tissue. Control samples presented a decrease of anti-Osterix (SP7)/anti-osteocalcin (BGLAP) (3.9 n mm-2 ± 0.32 versus 1.01 n mm-2 ± 0.20) and alkaline phosphatase (ALP) (12.14 n mm-2 ± 6.29 versus 6.29 n mm-2 ± 2.73) immunohistochemical-positive elements, which was suggestive of a stabilized healing phase. Based on these observations, local ST administration boosted bone regeneration in rat calvarial critical-size defects at one month. This study showed the potential of local steroid delivery in bone regeneration.
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Affiliation(s)
- G Ghiacci
- Dipartimento di Medicina e Chirurgia, Centro Universitario di Odontoiatria, Università degli Studi di Parma, Via Gramsci 14, 43126, Parma. Italy
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