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Effect of Hydroxyapatite/β-Tricalcium Phosphate on Osseointegration after Implantation into Mouse Maxilla. Int J Mol Sci 2023; 24:ijms24043124. [PMID: 36834535 PMCID: PMC9965049 DOI: 10.3390/ijms24043124] [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: 01/10/2023] [Revised: 01/31/2023] [Accepted: 02/02/2023] [Indexed: 02/08/2023] Open
Abstract
In our previous study we established an animal model for immediately placed implants using mice and clarified that there were no significant differences in the chronological healing process at the bone-implant interface between immediately and delayed placed implants blasted with hydroxyapatite (HA)/β-tricalcium phosphate (β-TCP) (ratio 1:4). This study aimed to analyze the effects of HA/β-TCP on osseointegration at the bone-implant interface after immediately placed implants in the maxillae of 4-week-old mice. Right maxillary first molars were extracted and cavities were prepared with a drill and titanium implants, blasted with or without HA/β-TCP, were placed. The fixation was followed-up at 1, 5, 7, 14, and 28 days after implantation, and the decalcified samples were embedded in paraffin and prepared sections were processed for immunohistochemistry using anti-osteopontin (OPN) and Ki67 antibodies, and tartrate-resistant acid phosphatase histochemistry. The undecalcified sample elements were quantitatively analyzed by an electron probe microanalyzer. Bone formation occurred on the preexisting bone surface (indirect osteogenesis) and on the implant surface (direct osteogenesis), indicating that osseointegration was achieved until 4 weeks post-operation in both of the groups. In the non-blasted group, the OPN immunoreactivity at the bone-implant interface was significantly decreased compared with the blasted group at week 2 and 4, as well as the rate of direct osteogenesis at week 4. These results suggest that the lack of HA/β-TCP on the implant surface affects the OPN immunoreactivity on the bone-implant interface, resulting in decreased direct osteogenesis following immediately placed titanium implants.
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Salem AS, Mowafey B, Elsheikh HAE, Gadallah AMT, Kandil I. Impact of Three Different Surgical Drilling Protocols on Early Loaded Single Implant in Posterior Maxilla: A 3-year Follow-up. J Contemp Dent Pract 2022; 23:819-827. [DOI: https:/doi.org/10.5005/jp-journals-10024-3391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
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The Immunomodulatory and Regenerative Effect of Biodentine™ on Human THP-1 Cells and Dental Pulp Stem Cells: In Vitro Study. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2656784. [PMID: 36093401 PMCID: PMC9462999 DOI: 10.1155/2022/2656784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/09/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022]
Abstract
Background Pulp tissue affected by deep caries and trauma can be protected by vital pulp therapies in which pulp regeneration success depends on the degree of pulp inflammation and the presence of regenerative signals. Reparative dentinogenesis requires dental pulp stem cell (DPSC) activity which can be stimulated by many bioactive molecules to repair the dentine, mediating a balance between the inflammatory response and the reparative events. Therefore, this study was performed in order to investigate the immune-inflammatory effect of Biodentine capping material on DPSCs and macrophages. Method THP-1, a human monocytic cell line, was differentiated to macrophages, and flow cytometry was used to analyze the expressions of specific macrophage markers. LPS-mediated infection was created for macrophages and DPSCs followed by treatment with Biodentine. CBA array was used to investigate the cytokine secretion followed by qPCR. Migration potential of treated DPSCs was also determined. Results Our results showed that THP-1 cell line was successfully differentiated into macrophages as shown by surface marker expression. CBA array and qPCR results showed that Biodentine-treated DPSCs and macrophages upregulated anti-inflammatory cytokines and downregulated proinflammatory cytokines. Also, Biodentine enhances the migration potential of treated DPSCs. Conclusion Biodentine capping material mediated the polarization of M1 to M2 macrophages suggestive of tissue repair properties of macrophages and enhanced the anti-inflammatory cytokines of DPSCs responsible for dentine-pulp regeneration.
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Omi M, Mishina Y. Roles of osteoclasts in alveolar bone remodeling. Genesis 2022; 60:e23490. [PMID: 35757898 PMCID: PMC9786271 DOI: 10.1002/dvg.23490] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 05/25/2022] [Accepted: 06/09/2022] [Indexed: 12/30/2022]
Abstract
Osteoclasts are large multinucleated cells from hematopoietic origin and are responsible for bone resorption. A balance between osteoclastic bone resorption and osteoblastic bone formation is critical to maintain bone homeostasis. The alveolar bone, also called the alveolar process, is the part of the jawbone that holds the teeth and supports oral functions. It differs from other skeletal bones in several aspects: its embryonic cellular origin, the form of ossification, and the presence of teeth and periodontal tissues; hence, understanding the unique characteristic of the alveolar bone remodeling is important to maintain oral homeostasis. Excessive osteoclastic bone resorption is one of the prominent features of bone diseases in the jaw such as periodontitis. Therefore, inhibiting osteoclast formation and bone resorptive process has been the target of therapeutic intervention. Understanding the mechanisms of osteoclastic bone resorption is critical for the effective treatment of bone diseases in the jaw. In this review, we discuss basic principles of alveolar bone remodeling with a specific focus on the osteoclastic bone resorptive process and its unique functions in the alveolar bone. Lastly, we provide perspectives on osteoclast-targeted therapies and regenerative approaches associated with bone diseases in the jaw.
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Affiliation(s)
- Maiko Omi
- Department of Biologic and Materials Sciences & ProsthodonticsUniversity of Michigan School of DentistryAnn ArborMichiganUSA
| | - Yuji Mishina
- Department of Biologic and Materials Sciences & ProsthodonticsUniversity of Michigan School of DentistryAnn ArborMichiganUSA
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Elsheikh HAE, Gadallah AMT, Mowafey B, Kandil I, Salem AS. Impact of Three Different Surgical Drilling Protocols on Early Loaded Single Implant in Posterior Maxilla: A 3-year Follow-up. J Contemp Dent Pract 2022; 23:819-827. [PMID: 37283017 DOI: 10.5005/jp-journals-10024-3391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
AIM This study aims to compare three different drilling techniques for implant site preparation to enhance the primary stability of the early loaded single implant in the posterior maxilla. MATERIALS AND METHODS A total of 36 dental implants were used in this study for the replacement of a missing single tooth or more in the maxillary posterior region with an early loaded dental implant. The patients were randomly divided into three groups. In group I, the drilling was performed using an undersized drilling technique, in group II, the drilling was performed using bone expanders, and in group III, the drilling was performed using the osseodensification (OD) technique. Patients were evaluated clinically and radiographically at regular time intervals immediately, 4 weeks, 6 months, 1 year, 2 years, and 3 years after surgery. All clinical and radiographic parameters were subjected to statistical analysis. RESULTS All implants in group I were stable and successful, while 11 from 12 implants survived in both groups II and III. There was no significant difference in peri-implant soft tissue health and marginal bone loss (MBL) throughout the whole study period between the three groups, while there was a significant difference in implant stability and insertion torque between groups I, II, and III at the time of implant placement. CONCLUSION Preparing the implant bed using the undersized drilling technique with drills with similar geometry to the implant being inserted provides high implant primary stability without the need for additional instruments or cost. CLINICAL SIGNIFICANCE Dental implants can be early loaded in the posterior maxilla by using an undersized drilling technique, as it improves primary stability.
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Affiliation(s)
- Heba Abo-Elfetouh Elsheikh
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Mansoura University, Mansoura, Egypt, Phone: +20 1024461010, e-mail:
| | | | - Bassant Mowafey
- Department of Oral Medicine and Periodontology, Diagnosis and Oral Radiology, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Islam Kandil
- Department of Oral Medicine and Periodontology, Diagnosis and Oral Radiology, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Ahmed S Salem
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Rana C, Nagpal A, Bhatia V, Kalra JS. Comparative evaluation of crestal bone levels following placement of implant in delayed implant bed: An in vivo clinical study. Natl J Maxillofac Surg 2021; 12:397-403. [PMID: 35153438 PMCID: PMC8820306 DOI: 10.4103/njms.njms_54_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/25/2020] [Accepted: 05/04/2021] [Indexed: 12/04/2022] Open
Abstract
Background: Restoring lost dentition using dental implant is one of the most promising treatment modality, for both complete and partially dentulous situation. In order to have more predictable outcome, the quest for coming up with a surgical protocol has been never ending. Keeping the same in mind the present study was conducted to place implant in delayed implants beds, i.e., 14 days after the osteotomy site was prepared. Materials and Methods: For the purpose of the study, ten implants measuring 4.2 mm × 10 mm were placed in ten healthy individuals with missing mandibular first molars in site prepared 14 days before actual placement of implants, i.e., delayed implant beds. Results: The study revealed that, on evaluation of the bone levels at the time of placement of prosthetic loading revealed, a bone gain was maximum after 3 months of prosthetic loading. Conclusion: A significant bone gain with a mean of 0.8 mm makes this technique of placing implants in delayed implant beds a more predictable technique than conventional protocol.
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Affiliation(s)
- Chhavi Rana
- Department of Prosthodontics, ITS Dental College, Hospital and Research Center, Greater Noida, Uttar Pradesh, India
| | - Abhishek Nagpal
- Department of Prosthodontics, ITS Dental College, Hospital and Research Center, Greater Noida, Uttar Pradesh, India
| | - Vishwas Bhatia
- Department of Prosthodontics, ITS Dental College, Hospital and Research Center, Greater Noida, Uttar Pradesh, India
| | - Jasneet Singh Kalra
- Department of Prosthodontics, ITS Dental College, Hospital and Research Center, Greater Noida, Uttar Pradesh, India
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Influence of osteoporosis and mechanical loading on bone around osseointegrated dental implants: A rodent study. J Mech Behav Biomed Mater 2021; 123:104771. [PMID: 34438251 DOI: 10.1016/j.jmbbm.2021.104771] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 11/20/2022]
Abstract
This study aimed to evaluate the influence of estrogen deficiency and mechanical loading on bone around osseointegrated dental implants in a rat jaw model. The maxillary right first molars of 36 rats were extracted. One week later, the rats were divided into an unloaded group and a loaded group; short head implants and long head implants were inserted respectively. Nine weeks after implantation, the rats were further subjected to ovariectomy (OVX) or sham surgery. All animals were euthanized 21 weeks after OVX. Micro-computed tomography, histological and histomorphometrical evaluation were undertaken. Systemic bone mineral density and bone volume fraction decreased in OVX groups compared with the sham controls. Histomorphometrical observation indicated that unloaded OVX group showed significantly damaged osseointegration and bone loss versus the loaded OVX group. Both the bone density (BD) inside the peri-implant grooves and the percentage of bone-to-implant contact (BIC) were lower in the OVX groups than in the sham-surgery groups, although mechanical loading increased the BIC and BD in the loaded OVX group compared with the unloaded OVX group. An increased number of positive cells for tartrate-resistant acid phosphatase was observed in the OVX groups versus the sham controls. The percentage of sclerostin-positive osteocytes was lower under loaded compared with unloaded conditions in both the OVX groups and the sham controls. In conclusion, estrogen deficiency could be a risk factor for the long-term stability of osseointegrated implants, while mechanical loading could attenuate the negative influence of estrogen deficiency on bone formation and osseointegration.
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Song W, Li S, Tang Q, Chen L, Yuan Z. In vitro biocompatibility and bioactivity of calcium silicate‑based bioceramics in endodontics (Review). Int J Mol Med 2021; 48:128. [PMID: 34013376 PMCID: PMC8136140 DOI: 10.3892/ijmm.2021.4961] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 03/19/2021] [Indexed: 12/26/2022] Open
Abstract
Calcium silicate-based bioceramics have been applied in endodontics as advantageous materials for years. In addition to excellent physical and chemical properties, the biocompatibility and bioactivity of calcium silicate-based bioceramics also serve an important role in endodontics according to previous research reports. Firstly, bioceramics affect cellular behavior of cells such as stem cells, osteoblasts, osteoclasts, fibroblasts and immune cells. On the other hand, cell reaction to bioceramics determines the effect of wound healing and tissue repair following bioceramics implantation. The aim of the present review was to provide an overview of calcium silicate-based bioceramics currently applied in endodontics, including mineral trioxide aggregate, Bioaggregate, Biodentine and iRoot, focusing on their in vitro biocompatibility and bioactivity. Understanding their underlying mechanism may help to ensure these materials are applied appropriately in endodontics.
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Affiliation(s)
- Wencheng Song
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Shue Li
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Qingming Tang
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Lili Chen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Zhenglin Yuan
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
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The Influence of New Silicate Cement Mineral Trioxide Aggregate (MTA Repair HP) on Metalloproteinase MMP-2 and MMP-9 Expression in Cultured THP-1 Macrophages. Int J Mol Sci 2020; 22:ijms22010295. [PMID: 33396675 PMCID: PMC7795909 DOI: 10.3390/ijms22010295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/23/2020] [Accepted: 12/24/2020] [Indexed: 02/07/2023] Open
Abstract
The aim of the present study was to investigate the new silicate cement mineral trioxide aggregate (MTA Repair HP) with respect to its effect on the inflammation process involving the tooth and periodontal tissues. The composition of MTA Repair HP was supplemented with plasticizer agents which can have a negative effect on the modulation of tooth inflammation. The silicate-based material in question is widely used in regeneration of the pulp-dentin complex, treatment of perforations of various locations in the tooth, as well as in surgical treatment of the complications of periapical tissue. The improved bioceramic restorative cement can affect the expression of metalloproteinases MMP-2 and MMP-9 in monocytes/macrophages involved in modulation of inflammation and regenerative processes of the tooth and periodontal tissues. The novel aspect of the present study lies in the application of the model of THP-1 monocyte/macrophage and applying the biomaterial in direct contact with the cells. Hence, it provides a representation of clinical conditions with respect to regenerative pulp and periodontal treatment with the use of MTA Repair HP. A lack of macrophage activation (as measured with flow cytometry) was found. Moreover, the study identified a lack of expression stimulation of the studied metalloproteinases (with the use of Western blotting and fluorescent microscopy). Similarly, no increase in MMP-2 and MMP-9 concentration was found (measured by ELISA method) in vitro when incubated with MTA Repair HP. Based on the results it can be concluded that new MTA Repair HP does not increase the inflammatory response in monocytes/macrophages associated with the activity of the described enzymes. It can also be speculated that they do not affect the process of dentin regeneration in which MMP-2 and MMP-9 play significant roles.
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Sikora M, Baranowska-Bosiacka I, Goschorska M, Chlubek D. In vitro effect of three-dimensional (3D) titanium mini-plate systems used for surgical treatment of condylar fractures on interleukin 1 (IL-1) and interleukin 6 (IL-6) concentration in THP-1 macrophages. Tissue Cell 2020; 67:101404. [PMID: 32835937 DOI: 10.1016/j.tice.2020.101404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/03/2020] [Accepted: 07/04/2020] [Indexed: 01/03/2023]
Abstract
About 20 %-35 % of mandibular fractures occur in the condylar process, a complication frequently associated with craniofacial traumas. Compared to other craniofacial fractures, some controversy remains around the effectiveness of the various treatment methods. It has been suggested that condylar osteosynthesis using mini-plates - a technique widely used by maxillofacial surgeons - may activate a pro-inflammatory response which is mediated by interleukins, later involved in bone remodelling and tissue regeneration. This study aimed at examining the influence of three-dimensional (3D) titanium mini-plate systems and the dedicated screws used in the surgical treatment of condylar fractions on the concentrations of interleukin 1(IL-1) and interleukin 6 (IL-6) in macrophages obtained from THP-1 monocytes. The cells were cultured for 24 h and 48 h with the 3D titanium condylar plates and dedicated screws (Synthes, Martin, Medartis manufacturer). The concentrations of IL-1 and IL-6 were measured using the ELISA method. Incubation of macrophages with plates did not cause a significant increase in IL-1 (for: Synthes 0.89-0.86 pg/mg protein; Martin 1.10-0.80 pg/mg protein; Medartis 1.20-0.84 pg/mg protein) and IL-6 (for Synthes 16.00-14.00 pg/mg protein, Martin 13.0-10.0 pg/mg protein; Medartis 9.0-12.0 pg/mg protein) expression for any of the plates used, compared to THP-1 macrophages incubated for 48 h under control conditions. Neither three-dimensional titanium mini-plates nor dedicated screws caused any changes in IL-1 and IL-6 expression in THP-1 macrophages, which is an important observation for clinicians treating condylar fractures. It confirms that titanium plates can be a safe/neutral material for humans, especially considering their significant influence on the osteoclast functions and bone remodelling processes after implantation.
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Affiliation(s)
- Maciej Sikora
- Department of Maxillofacial Surgery, Hospital of the Ministry of Interior, Kielce, Wojska Polskiego 51, 25-375, Kielce, Poland; Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111, Szczecin, Poland.
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111, Szczecin, Poland.
| | - Marta Goschorska
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111, Szczecin, Poland.
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72, 70-111, Szczecin, Poland.
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Barczak K, Palczewska-Komsa M, Nowicka A, Chlubek D, Buczkowska-Radlińska J. Analysis of the Activity and Expression of Cyclooxygenases COX1 and COX2 in THP-1 Monocytes and Macrophages Cultured with Biodentine TM Silicate Cement. Int J Mol Sci 2020; 21:ijms21062237. [PMID: 32213831 PMCID: PMC7139705 DOI: 10.3390/ijms21062237] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 03/20/2020] [Indexed: 12/17/2022] Open
Abstract
BiodentineTM is a material based on hydrated calcium silicate with odontotropic properties. However, from the clinician’s perspective, every material used to fill a tooth—even those showing the optimal biochemical parameters—is in fact a foreign body introduced to the organism of the host. Therefore, apart from the chemical parameters of such materials, equally important is the so-called biocompatibility of such materials. The aim of the study was to investigate whether BiodentineTM, used in the regeneration of the pulp-dentine complex, may affect the expression of the enzymes cyclooxygenase 1 (COX1) and cyclooxygenase 2 (COX2) in THP-1 monocytes/macrophages and the amount of prostanoids synthesized by these enzymes-precursors of biologically active prostanoids such as prostaglandin E2 (PGE2) and thromboxane (TXB2) which are mediators of inflammation. An original aspect of this research is the use of the THP-1 monocyte/macrophage cell model and the use of biomaterial in direct contact with cells. In this way we tried to reflect the clinical conditions of regenerative pulp and periodontal tissue treatment using BiodentineTM. The results of our study showed a lack of macrophage activation (measured by flow cytometry) and a lack of stimulation of the expression of the studied cyclooxygenase enzymes (measured by Western blotting and fluorescent microscopy), as well as a lack of increase in the concentration (measured by ELISA method) of their inflammatory mediators (PGE2 and TXB2) in vitro incubated with BiodentineTM.
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Affiliation(s)
- Katarzyna Barczak
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Powstańców Wlkp 72, 70-111 Szczecin, Poland; (M.P.-K.); (A.N.); (J.B.-R.)
- Correspondence: ; Tel.: +48-914-661-648
| | - Mirona Palczewska-Komsa
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Powstańców Wlkp 72, 70-111 Szczecin, Poland; (M.P.-K.); (A.N.); (J.B.-R.)
| | - Alicja Nowicka
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Powstańców Wlkp 72, 70-111 Szczecin, Poland; (M.P.-K.); (A.N.); (J.B.-R.)
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp, 70-111 Szczecin, Poland;
| | - Jadwiga Buczkowska-Radlińska
- Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Powstańców Wlkp 72, 70-111 Szczecin, Poland; (M.P.-K.); (A.N.); (J.B.-R.)
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Pelegrine AA, Moy PK, Moshaverinia A, Escada ALDA, Calvo-Guirado JL, Claro APRA. Development of a Novel Nanotextured Titanium Implant. An Experimental Study in Rats. J Clin Med 2019; 8:jcm8070954. [PMID: 31262092 PMCID: PMC6678396 DOI: 10.3390/jcm8070954] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 06/27/2019] [Accepted: 06/28/2019] [Indexed: 11/16/2022] Open
Abstract
This animal study evaluated the osseointegration level of a new nanotextured titanium surface produced by anodization. Ti-cp micro-implants (1.5 mm diameter by 2.5 mm in length) divided into two groups: titanium nanotextured surface treatment (Test Group) and acid etched surface treatment (Control Group). Surface characterization included morphology analysis using scanning electron microscopy and wettability by measuring contact angle. Sixteen Wistar rats were submitted to two micro implants surgical placement procedures. In each rat, one type of micro implant placed in each tibia. The animals sacrificed after two (T1) and six weeks (T2) post-implantation. After the euthanasia, tibias processed for histomorphometric analysis, which allowed the evaluation of bone to implant contact (BIC) and the bone area fraction occupancy between the threads (BAFO). Our surface analysis data showed that the Control Group exhibited an irregular and non-homogenous topography while the Test Group showed a nanotextured surface. The Test Group showed higher wettability (contact angle = 5.1 ± 0.7°) than the Control Group (contact angle = 75.5 ± 4.6°). Concerning the histomorphometric analysis results for T1, Control and Test groups showed BIC percentages of 41.3 ± 15.2% and 63.1 ± 8.7% (p < 0.05), respectively, and for BAFO, 28.7 ± 13.7% and 54.8 ± 7.5%, respectively (p < 0.05). For T2, the histomorphometric analysis for Control and Test groups showed BIC percentages of 51.2 ± 11.4% and 64.8 ± 7.4% (p < 0.05), respectively and for BAFO, 36.4 ± 10.3% and 57.9 ± 9.3% (p < 0.05), respectively. The findings of the current study confirmed that the novel nanotextured surface exhibited superior wettability, improved peri-implant bone formation, and expedited osseointegration.
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Affiliation(s)
| | - Peter Karyen Moy
- Department of Advanced Prosthodontics University of California, Los Angeles, CA 90095, USA
| | - Alireza Moshaverinia
- Department of Advanced Prosthodontics University of California, Los Angeles, CA 90095, USA
| | | | - José Luis Calvo-Guirado
- Department of Oral and Implant Surgery, Universidad Católica San Antonio de Murcia, 30107 Murcia, Spain
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Mechanical and Biological Advantages of a Tri-Oval Implant Design. J Clin Med 2019; 8:jcm8040427. [PMID: 30925746 PMCID: PMC6517945 DOI: 10.3390/jcm8040427] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/22/2019] [Accepted: 03/25/2019] [Indexed: 02/05/2023] Open
Abstract
Of all geometric shapes, a tri-oval one may be the strongest because of its capacity to bear large loads with neither rotation nor deformation. Here, we modified the external shape of a dental implant from circular to tri-oval, aiming to create a combination of high strain and low strain peri-implant environment that would ensure both primary implant stability and rapid osseointegration, respectively. Using in vivo mouse models, we tested the effects of this geometric alteration on implant survival and osseointegration over time. The maxima regions of tri-oval implants provided superior primary stability without increasing insertion torque. The minima regions of tri-oval implants presented low compressive strain and significantly less osteocyte apoptosis, which led to minimal bone resorption compared to the round implants. The rate of new bone accrual was also faster around the tri-oval implants. We further subjected both round and tri-oval implants to occlusal loading immediately after placement. In contrast to the round implants that exhibited a significant dip in stability that eventually led to their failure, the tri-oval implants maintained their stability throughout the osseointegration period. Collectively, these multiscale biomechanical analyses demonstrated the superior in vivo performance of the tri-oval implant design.
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Lee J, Yoo JM, Amara HB, Lee YM, Lim YJ, Kim H, Koo KT. Bone healing dynamics associated with 3 implants with different surfaces: histologic and histomorphometric analyses in dogs. J Periodontal Implant Sci 2019; 49:25-38. [PMID: 30847254 PMCID: PMC6399089 DOI: 10.5051/jpis.2019.49.1.25] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 01/30/2019] [Indexed: 11/08/2022] Open
Abstract
Purpose This study evaluated differences in bone healing and remodeling among 3 implants with different surfaces: sandblasting and large-grit acid etching (SLA; IS-III Active®), SLA with hydroxyapatite nanocoating (IS-III Bioactive®), and SLA stored in sodium chloride solution (SLActive®). Methods The mandibular second, third, and fourth premolars of 9 dogs were extracted. After 4 weeks, 9 dogs with edentulous alveolar ridges underwent surgical placement of 3 implants bilaterally and were allowed to heal for 2, 4, or 12 weeks. Histologic and histomorphometric analyses were performed on 54 stained slides based on the following parameters: vertical marginal bone loss at the buccal and lingual aspects of the implant (b-MBL and l-MBL, respectively), mineralized bone-to-implant contact (mBIC), osteoid-to-implant contact (OIC), total bone-to-implant contact (tBIC), mineralized bone area fraction occupied (mBAFO), osteoid area fraction occupied (OAFO), and total bone area fraction occupied (tBAFO) in the threads of the region of interest. Two-way analysis of variance (3 types of implant surface×3 healing time periods) and additional analyses for simple effects were performed. Results Statistically significant differences were observed across the implant surfaces for OIC, mBIC, tBIC, OAFO, and tBAFO. Statistically significant differences were observed over time for l-MBL, mBIC, tBIC, mBAFO, and tBAFO. In addition, an interaction effect between the implant surface and the healing time period was observed for mBIC, tBIC, and mBAFO. Conclusions Our results suggest that implant surface wettability facilitates bone healing dynamics, which could be attributed to the improvement of early osseointegration. In addition, osteoblasts might become more activated with the use of HA-coated surface implants than with hydrophobic surface implants in the remodeling phase.
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Affiliation(s)
- Jungwon Lee
- Department of Periodontics, One-Stop Specialty Center, Seoul National University Dental Hospital, Seoul, Korea
| | - Jung Min Yoo
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea
| | - Heithem Ben Amara
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea
| | - Yong-Moo Lee
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea.,Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Young-Jun Lim
- Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Korea.,Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
| | - Haeyoung Kim
- Department of Health Policy and Management, Korea University College of Health Science, Seoul, Korea
| | - Ki-Tae Koo
- Department of Periodontology, Seoul National University School of Dentistry, Seoul, Korea.,Dental Research Institute, Seoul National University School of Dentistry, Seoul, Korea
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Liu F, Liu Y, Li X, Wang X, Li D, Chung S, Chen C, Lee IS. Osteogenesis of 3D printed macro-pore size biphasic calcium phosphate scaffold in rabbit calvaria. J Biomater Appl 2019; 33:1168-1177. [PMID: 30665312 DOI: 10.1177/0885328218825177] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
To investigate the osteogenesis of macro-pore sized bone scaffolds, biphasic calcium phosphate scaffolds with accurately controlled macro-pore size (0.8, 1.2, and 1.6 mm) and identical porosity of 70% were fabricated by the 3D printing technology. Eight New Zealand rabbits were selected in the present study, while four 8-mm-diameter calvarial defects were created in each rabbit to place BCP scaffolds with different macro-pore size. The harvested specimens of four and eight weeks were used to evaluate the bone forming ability by micro CT and histological examination. All 3D-printed BCP scaffolds exhibited excellent mechanical properties and had better bone-forming ability than the control at both four and eight weeks. Among them, scaffold with 0.8 mm pore size was superior for initial bone formation and maturation, resulting in the highest value of total bone formation.
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Affiliation(s)
- Fan Liu
- 1 Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, China.,3 Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - Yi Liu
- 1 Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, China
| | - Xinyu Li
- 2 Department of Tissue Engineering, School of Fundamental Sciences, China Medical University, Shenyang, China
| | - Xiaohong Wang
- 1 Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, China
| | - Danni Li
- 4 Department of Medical Oncology, The First Affiliated Hospital, China Medical University, Shenyang, China
| | - SungMin Chung
- 5 Biomaterials R&D Center, GENOSS Co., Ltd., Suwon, Republic of Korea
| | - Cen Chen
- 6 College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou, China
| | - In-Seop Lee
- 7 College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, China.,8 Institute of Natural Sciences, Yonsei University, Seoul, Republic of Korea
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16
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Shah FA, Thomsen P, Palmquist A. Osseointegration and current interpretations of the bone-implant interface. Acta Biomater 2019; 84:1-15. [PMID: 30445157 DOI: 10.1016/j.actbio.2018.11.018] [Citation(s) in RCA: 156] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/28/2018] [Accepted: 11/12/2018] [Indexed: 02/07/2023]
Abstract
Complex physical and chemical interactions take place in the interface between the implant surface and bone. Various descriptions of the ultrastructural arrangement to various implant design features, ranging from solid and macroporous geometries to surface modifications on the micron-, submicron-, and nano- levels, have been put forward. Here, the current knowledge regarding structural organisation of the bone-implant interface is reviewed with a focus on solid devices, mainly metal (or alloy) intended for permanent anchorage in bone. Certain biomaterials that undergo surface and bulk degradation are also considered. The bone-implant interface is a heterogeneous zone consisting of mineralised, partially mineralised, and unmineralised areas. Within the meso-micro-nano-continuum, mineralised collagen fibrils form the structural basis of the bone-implant interface, in addition to accumulation of non-collagenous macromolecules such as osteopontin, bone sialoprotein, and osteocalcin. In the published literature, as many as eight distinct arrangements of the bone-implant interface ultrastructure have been described. The interpretation is influenced by the in vivo model and species-specific characteristics, healing time point(s), physico-chemical properties of the implant surface, implant geometry, sample preparation route(s) and associated artefacts, analytical technique(s) and their limitations, and non-compromised vs compromised local tissue conditions. The understanding of the ultrastructure of the interface under experimental conditions is rapidly evolving due to the introduction of novel techniques for sample preparation and analysis. Nevertheless, the current understanding of the interface zone in humans in relation to clinical implant performance is still hampered by the shortcomings of clinical methods for resolving the finer details of the bone-implant interface. STATEMENT OF SIGNIFICANCE: Being a hierarchical material by design, the overall strength of bone is governed by composition and structure. Understanding the structure of the bone-implant interface is essential in the development of novel bone repair materials and strategies, and their long-term success. Here, the current knowledge regarding the eventual structural organisation of the bone-implant interface is reviewed, with a focus on solid devices intended for permanent anchorage in bone, and certain biomaterials that undergo surface and bulk degradation. The bone-implant interface is a heterogeneous zone consisting of mineralised, partially mineralised, and unmineralised areas. Within the meso-micro-nano-continuum, mineralised collagen fibrils form the structural basis of the bone-implant interface, in addition to accumulation of non-collagenous macromolecules such as osteopontin, bone sialoprotein, and osteocalcin.
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17
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Stocchero M, Toia M, Jinno Y, Cecchinato F, Becktor JP, Naito Y, Halldin A, Jimbo R. Influence of different drilling preparation on cortical bone: A biomechanical, histological, and micro-CT study on sheep. Clin Oral Implants Res 2018; 29:707-715. [DOI: 10.1111/clr.13262] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 03/18/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Michele Stocchero
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology; Malmö University; Malmö Sweden
| | - Marco Toia
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology; Malmö University; Malmö Sweden
| | - Yohei Jinno
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology; Malmö University; Malmö Sweden
| | | | - Jonas P. Becktor
- Department of Oral and Maxillofacial Surgery and Oral Medicine, Faculty of Odontology; Malmö University; Malmö Sweden
| | - Yoshihito Naito
- Department of Biomaterials and Bioengineering, Graduate School of Oral Science; Tokushima University; Tokushima Japan
| | | | - Ryo Jimbo
- Department of Applied Prosthodontics, Graduate School of Biomedical Sciences; Nagasaki University; Nagasaki Japan
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18
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Ahn H, Patel RR, Hoyt AJ, Lin ASP, Torstrick FB, Guldberg RE, Frick CP, Carpenter RD, Yakacki CM, Willett NJ. Biological evaluation and finite-element modeling of porous poly(para-phenylene) for orthopaedic implants. Acta Biomater 2018; 72:352-361. [PMID: 29563069 DOI: 10.1016/j.actbio.2018.03.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 03/08/2018] [Accepted: 03/13/2018] [Indexed: 12/22/2022]
Abstract
Poly(para-phenylene) (PPP) is a novel aromatic polymer with higher strength and stiffness than polyetheretherketone (PEEK), the gold standard material for polymeric load-bearing orthopaedic implants. The amorphous structure of PPP makes it relatively straightforward to manufacture different architectures, while maintaining mechanical properties. PPP is promising as a potential orthopaedic material; however, the biocompatibility and osseointegration have not been well investigated. The objective of this study was to evaluate biological and mechanical behavior of PPP, with or without porosity, in comparison to PEEK. We examined four specific constructs: 1) solid PPP, 2) solid PEEK, 3) porous PPP and 4) porous PEEK. Pre-osteoblasts (MC3T3) exhibited similar cell proliferation among the materials. Osteogenic potential was significantly increased in the porous PPP scaffold as assessed by ALP activity and calcium mineralization. In vivo osseointegration was assessed by implanting the cylindrical materials into a defect in the metaphysis region of rat tibiae. Significantly more mineral ingrowth was observed in both porous scaffolds compared to the solid scaffolds, and porous PPP had a further increase compared to porous PEEK. Additionally, porous PPP implants showed bone formation throughout the porous structure when observed via histology. A computational simulation of mechanical push-out strength showed approximately 50% higher interfacial strength in the porous PPP implants compared to the porous PEEK implants and similar stress dissipation. These data demonstrate the potential utility of PPP for orthopaedic applications and show improved osseointegration when compared to the currently available polymeric material. STATEMENT OF SIGNIFICANCE PEEK has been widely used in orthopaedic surgery; however, the ability to utilize PEEK for advanced fabrication methods, such as 3D printing and tailored porosity, remain challenging. We present a promising new orthopaedic biomaterial, Poly(para-phenylene) (PPP), which is a novel class of aromatic polymers with higher strength and stiffness than polyetheretherketone (PEEK). PPP has exceptional mechanical strength and stiffness due to its repeating aromatic rings that provide strong anti-rotational biaryl bonds. Furthermore, PPP has an amorphous structure making it relatively easier to manufacture (via molding or solvent-casting techniques) into different geometries with and without porosity. This ability to manufacture different architectures and use different processes while maintaining mechanical properties makes PPP a very promising potential orthopaedic biomaterial which may allow for closer matching of mechanical properties between the host bone tissue while also allowing for enhanced osseointegration. In this manuscript, we look at the potential of porous and solid PPP in comparison to PEEK. We measured the mechanical properties of PPP and PEEK scaffolds, tested these scaffolds in vitro for osteocompatibility with MC3T3 cells, and then tested the osseointegration and subsequent functional integration in vivo in a metaphyseal drill hole model in rat tibia. We found that PPP permits cell adhesion, growth, and mineralization in vitro. In vivo it was found that porous PPP significantly enhanced mineralization into the construct and increased the mechanical strength required to push out the scaffold in comparison to PEEK. This is the first study to investigate the performance of PPP as an orthopaedic biomaterial in vivo. PPP is an attractive material for orthopaedic implants due to the ease of manufacturing and superior mechanical strength.
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Affiliation(s)
- Hyunhee Ahn
- Department of Orthopaedics, Emory University, Atlanta, GA, USA; The Atlanta Veterans Affairs Medical Center Atlanta, Decatur, GA, USA
| | - Ravi R Patel
- Department of Mechanical Engineering, University of Colorado, Denver, CO, USA
| | - Anthony J Hoyt
- Department of Mechanical Engineering, University of Wyoming, Laramie, WY, USA
| | - Angela S P Lin
- George W. Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - F Brennan Torstrick
- George W. Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Robert E Guldberg
- George W. Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Carl P Frick
- Department of Mechanical Engineering, University of Wyoming, Laramie, WY, USA
| | - R Dana Carpenter
- Department of Mechanical Engineering, University of Colorado, Denver, CO, USA
| | | | - Nick J Willett
- Department of Orthopaedics, Emory University, Atlanta, GA, USA; The Atlanta Veterans Affairs Medical Center Atlanta, Decatur, GA, USA.
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Histochemical examination on the peri-implant bone with early occlusal loading after the immediate placement into extraction sockets. Histochem Cell Biol 2018; 149:433-447. [DOI: 10.1007/s00418-018-1644-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2018] [Indexed: 01/20/2023]
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20
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Giavaresi G, Fini M, Chiesa R, Rimondini L, Rondelli G, Borsari V, Martini L, Nicolialdini N, Guzzardella GA, Giardino R. Osseointegration of Sandblasted or Anodised Hydrothermally-Treated Titanium Implants: Mechanical, Histomorphometric and Bone Hardness Measurements. Int J Artif Organs 2018; 25:806-13. [PMID: 12296466 DOI: 10.1177/039139880202500809] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The improvement of the implant-bone interface is still an open problem in the long-term mechanical stability of cementless fixed implants. Mechanical, histomorphometric and bone hardness measurements were performed in sheep femoral cortical bone implants at 8 and 12 weeks from surgery to compare in vivo the osseointegration of titanium screws (Ø 3.5 mm × 7 mm length) with two different surface treatments: sandblasting with 70–100 μm HA followed by acid etching with HNO3 (Group A) and Ca-P anodization followed by a hydrothermal treatment (Group B). No significant differences were found for maximum push-out force and interfacial strength between groups at both experimental times. No significant difference was observed for Bone Ingrowth between groups at both experimental times, while the Affinity Index of Group B was significantly higher (7.5%, p<0.05) and lower (10.2%, p<0.05) than that of Group A at 8 and 12 weeks, respectively. Finally, a significant increase in bone microhardness measured within 200 μm from the interface and inside the thread depth of Group A was observed between the two experimental times (p<0.05). In conclusion, present findings show that osseointegration may be accelerated by adequate surface roughness and bioactive ceramic coating such as current tested treatments which enhance bone interlocking and mineralization.
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Affiliation(s)
- G Giavaresi
- Experimental Surgery Department, Research Institute Codivilla-Putti, Rizzoli Orthopaedic Institute, Bologna, Italy
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In Vitro Effect of 3D Plates Used for Surgical Treatment of Condylar Fractures on Prostaglandin E₂ (PGE₂) and Thromboxane B₂ (TXB₂) Concentration in THP-1 Macrophages. Int J Mol Sci 2017; 18:ijms18122638. [PMID: 29292766 PMCID: PMC5751241 DOI: 10.3390/ijms18122638] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/29/2017] [Accepted: 12/02/2017] [Indexed: 12/14/2022] Open
Abstract
Recent studies have shown promising results concerning the effectiveness of 3D plates in terms of stabilization of condylar fractures. Despite the use of new techniques and new materials, we can still observe certain side effects, including the immune reaction of the body, which may lead to the excessive inflammation. The aim of this paper was to determine how the production of prostaglandin E₂ (PGE₂) and thromboxane B₂ (TXB₂) in THP-1 monocytes/macrophages is influenced by the titanium 3D plates and dedicated screws. The experiments were conducted on THP-1 monocytic cell line and macrophages derived from a THP-1cells. The concentrations of PGE₂ and TXB₂ released were measured by using immunoassay kit. Verification of plate-induced activation of THP-1 monocytes and macrophages and initiation of inflammatory reaction was conducted by flow cytometry. Despite some differences in the content of the implant devices our results showed that these plates did not statistically significantly increase the production of these prostanoids. Osteosynthesis of condylar fractures using 3D titanium mini-plates seems to be a good alternative to traditional plates due to their lack of stimulating the cyclooxygenase-dependent production of prostanoids; limiting the development of inflammatory reactions.
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22
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Topographical and elemental changes of retrieved stainless steel and titanium mini-implants after orthodontic treatment. J World Fed Orthod 2017. [DOI: 10.1016/j.ejwf.2017.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zhou W, Kuderer S, Liu Z, Ulm C, Rausch-Fan X, Tangl S. Peri-implant bone remodeling at the interface of three different implant types: a histomorphometric study in mini-pigs. Clin Oral Implants Res 2017; 28:1443-1449. [DOI: 10.1111/clr.13009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2017] [Indexed: 12/01/2022]
Affiliation(s)
- Wenjuan Zhou
- Department of Implant Dentistry; Yantai Stomatological Hospital; Binzhou Medical University; Yantai China
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research; Department of Oral Surgery; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
- Competence Center for Periodontal Research; Division of Conservative Dentistry and Periodontology; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
| | - Sonja Kuderer
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research; Department of Oral Surgery; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
- Austrian Cluster for Tissue Regeneration; Vienna Austria
| | - Zhonghao Liu
- Department of Implant Dentistry; Yantai Stomatological Hospital; Binzhou Medical University; Yantai China
| | - Christian Ulm
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research; Department of Oral Surgery; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
- Austrian Cluster for Tissue Regeneration; Vienna Austria
| | - Xiaohui Rausch-Fan
- Competence Center for Periodontal Research; Division of Conservative Dentistry and Periodontology; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
| | - Stefan Tangl
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research; Department of Oral Surgery; University Clinic of Dentistry; Medical University of Vienna; Vienna Austria
- Austrian Cluster for Tissue Regeneration; Vienna Austria
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Makishi S, Saito K, Ohshima H. Osteopontin-deficiency disturbs direct osteogenesis in the process of achieving osseointegration following immediate placement of endosseous implants. Clin Implant Dent Relat Res 2016; 19:496-504. [PMID: 27943627 DOI: 10.1111/cid.12467] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/05/2016] [Indexed: 11/25/2022]
Abstract
BACKGROUND The role of osteopontin (OPN) in the process of achieving osseointegration following implantation remains to be clarified. PURPOSE This study aimed to analyze the healing patterns of the bone-implant interface after immediate placement of implants in the maxillae of 4-week-old Opn-knockout (KO) and wild-type (WT) mice. MATERIALS AND METHODS After maxillary first molars were extracted, cavities were prepared with a drill and titanium implants blasted with ceramic abrasives containing hydroxyapatite/β-tricalcium phosphate were placed. Following fixation at 3, 5, 7, and 28 days after implantation, the samples were analyzed using immunohistochemistry, in situ hybridization, and an electron probe micro analyzer. RESULTS Two types of bone healing were observed in the process of achieving osseointegration: "direct osteogenesis," where bone formation occurs at the implant surface, and "indirect osteogenesis," where it does at the pre-existing damaged bone surface in the WT mice. Direct osteogenesis occurred after the recruitment of tartrate resistant acid phosphatase-positive cells and the deposition of OPN on the implant surface. In contrast, the rate of osseointegration or direct osteogenesis was significantly low, and cell proliferation was disturbed in the Opn-KO mice. CONCLUSIONS These results suggest that Opn-deficiency disturbs direct osteogenesis to lead the delayed osseointegration after immediate placement of endosseous implants.
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Affiliation(s)
- Sanako Makishi
- General Dentistry and Clinical Education Unit, Niigata University Medical and Dental Hospital, Niigata, Japan
| | - Kotaro Saito
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Doh RM, Kim S, Keum KC, Kim JW, Shim JS, Jung HS, Park KM, Chung MK. Postoperative irradiation after implant placement: A pilot study for prosthetic reconstruction. J Adv Prosthodont 2016; 8:363-371. [PMID: 27826386 PMCID: PMC5099128 DOI: 10.4047/jap.2016.8.5.363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/08/2016] [Accepted: 08/08/2016] [Indexed: 11/23/2022] Open
Abstract
PURPOSE On maxillofacial tumor patients, oral implant placement prior to postoperative radiotherapy can shorten the period of prosthetic reconstruction. There is still lack of research on effects of post-implant radiotherapy such as healing process or loading time, which is important for prosthodontic treatment planning. Therefore, this study evaluated the effects of post-implant local irradiation on the osseointegration of implants during different healing stages. MATERIALS AND METHODS Custom-made implants were placed bilaterally on maxillary posterior edentulous area 4 weeks after extraction of the maxillary first molars in Forty-eight Sprague-Dawley rats. Experimental group (exp.) received radiation after implant surgery and the other group (control) didn't. Each group was divided into three sub-groups according to the healing time (2, 4, and 8 week) from implant placement. The exp. group 1, 2 received 15-Gy radiation 1 day after implant placement (immediate irradiation). The exp. group 3 received 15-Gy radiation 4 weeks after implant placement (delayed irradiation). RESULTS The bone mineral density (BMD) was significantly lower in the immediate irradiation groups. BMD was similar in the delayed irradiation group and the control group. The irradiated groups exhibited a lower bone-to-implant contact ratio, although the difference was not statistically significant. The irradiated groups also exhibited a significantly lower bone volume and higher empty lacuna count than the control groups. No implant failure due to local irradiation was found in this study. CONCLUSION Within the limits of this study, the timing of local irradiation critically influences the bone healing mechanism, which is related to loading time of prostheses.
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Affiliation(s)
- Re-Mee Doh
- Department of Advanced General Dentistry, Dankook University College of Dentistry, Cheonan, Republic of Korea
| | - Sungtae Kim
- Department of Periodontology, Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Ki Chang Keum
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jun Won Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Han-Sung Jung
- Division in Anatomy and Development Biology, Department of Oral Biology, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Kyeong-Mee Park
- Department of Advanced General Dentistry, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Moon-Kyu Chung
- Division in Anatomy and Development Biology, Department of Oral Biology, Yonsei University College of Dentistry, Seoul, Republic of Korea
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Mello ASDS, dos Santos PL, Marquesi A, Queiroz TP, Margonar R, de Souza Faloni AP. Some aspects of bone remodeling around dental implants. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.piro.2015.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Correlation Between Stress Distributions and Biological Reactions in Bone Surrounding Implants That Support Cantilevers in Supraocclusal Contact in Rats. IMPLANT DENT 2015; 25:204-13. [PMID: 26695704 DOI: 10.1097/id.0000000000000369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To investigate the relationship between stress distributions and peri-implant bone reactions around maxillary implants that support cantilevers in supraocclusal contact. MATERIALS AND METHODS After molar extraction, 16 Wistar rats received a titanium implant unilaterally. After healing, 8 rats (control group) were killed and the others received implant-supported cantilever superstructures in supraocclusion (loaded group). After 5 days, they were killed. The maxillae of all rats were scanned by microcomputed tomography (μ-CT). Based on the μ-CT images, bone volumes were measured. For the loaded group, 3D finite element models were created and analyzed under 20-N vertical and 5-N lateral forces, successively. After μ-CT scanning, sections were prepared and observed histologically. RESULTS When compared with the controls, the bone volume tended to decrease in the loaded group, but the difference was not statistically significant. On average, marginal bone resorption and stresses tended to be higher in 2 rats that occluded on the cantilever arm than in the others, which occluded right on the implant, nevertheless, calculated stress did not surpass the maximum elastic stress (yielding strength) of rat bone. However, at the implant-bone interface of these samples, partial bone resorption surrounded by signs of active resorption was histologically found. CONCLUSION These findings suggest that in this occlusally loaded rat model, the stress distributions correlated to some extent with bone volume and morphological changes observed on μ-CT images and histological sections.
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Nagasawa M, Cooper LF, Ogino Y, Mendonca D, Liang R, Yang S, Mendonca G, Uoshima K. Topography Influences Adherent Cell Regulation of Osteoclastogenesis. J Dent Res 2015; 95:319-26. [PMID: 26553885 DOI: 10.1177/0022034515616760] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The importance of osteoclast-mediated bone resorption in the process of osseointegration has not been widely considered. In this study, cell culture was used to investigate the hypothesis that the function of implant-adherent bone marrow stromal cells (BMSCs) in osteoclastogenesis is influenced by surface topography. BMSCs isolated from femur and tibia of Sprague-Dawley rats were seeded onto 3 types of titanium surfaces (smooth, micro, and nano) and a control surface (tissue culture plastic) with or without osteogenic supplements. After 3 to 14 d, conditioned medium (CM) was collected. Subsequently, rat bone marrow-derived macrophages (BMMs) were cultured in media supplemented with soluble receptor activator of NF-κB ligand (RANKL) and macrophage colony-stimulating factor (M-CSF) as well as BMSC CM from each of the 4 surfaces. Gene expression levels of soluble RANKL, osteoprotegerin, tumor necrosis factor α, and M-CSF in cultured BMSCs at different time points were measured by real-time polymerase chain reaction. The number of differentiated osteoclastic cells was determined after tartrate-resistant acid phosphatase staining. Analysis of variance and t test were used for statistical analysis. The expression of prominent osteoclast-promoting factors tumor necrosis factor α and M-CSF was increased by BMSCs cultured on both micro- and nanoscale titanium topographies (P < 0.01). BMSC CM contained a heat-labile factor that increased BMMs osteoclastogenesis. CM from both micro- and nanoscale surface-adherent BMSCs increased the osteoclast number (P < 0.01). Difference in surface topography altered BMSC phenotype and influenced BMM osteoclastogenesis. Local signaling by implant-adherent cells at the implant-bone interface may indirectly control osteoclastogenesis and bone accrual around endosseous implants.
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Affiliation(s)
- M Nagasawa
- Bone Biology and Implant Therapy Laboratory, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA Division of Bio-prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Nigata, Japan
| | - L F Cooper
- Bone Biology and Implant Therapy Laboratory, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Y Ogino
- Department of Oral Rehabilitation, Kyushu University, Fukuoka, Japan
| | - D Mendonca
- Department of Biologic and Materials Sciences, Division of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - R Liang
- Bone Biology and Implant Therapy Laboratory, School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - S Yang
- College of Stomatology, Chongqing Medical University, Chongqing, China
| | - G Mendonca
- Department of Biologic and Materials Sciences, Division of Prosthodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - K Uoshima
- Division of Bio-prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Nigata, Japan
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Sheikh Z, Brooks PJ, Barzilay O, Fine N, Glogauer M. Macrophages, Foreign Body Giant Cells and Their Response to Implantable Biomaterials. MATERIALS (BASEL, SWITZERLAND) 2015; 8:5671-5701. [PMID: 28793529 PMCID: PMC5512621 DOI: 10.3390/ma8095269] [Citation(s) in RCA: 396] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 08/20/2015] [Accepted: 08/21/2015] [Indexed: 12/23/2022]
Abstract
All biomaterials, when implanted in vivo, elicit cellular and tissue responses. These responses include the inflammatory and wound healing responses, foreign body reactions, and fibrous encapsulation of the implanted materials. Macrophages are myeloid immune cells that are tactically situated throughout the tissues, where they ingest and degrade dead cells and foreign materials in addition to orchestrating inflammatory processes. Macrophages and their fused morphologic variants, the multinucleated giant cells, which include the foreign body giant cells (FBGCs) are the dominant early responders to biomaterial implantation and remain at biomaterial-tissue interfaces for the lifetime of the device. An essential aspect of macrophage function in the body is to mediate degradation of bio-resorbable materials including bone through extracellular degradation and phagocytosis. Biomaterial surface properties play a crucial role in modulating the foreign body reaction in the first couple of weeks following implantation. The foreign body reaction may impact biocompatibility of implantation devices and may considerably impact short- and long-term success in tissue engineering and regenerative medicine, necessitating a clear understanding of the foreign body reaction to different implantation materials. The focus of this review article is on the interactions of macrophages and foreign body giant cells with biomaterial surfaces, and the physical, chemical and morphological characteristics of biomaterial surfaces that play a role in regulating the foreign body response. Events in the foreign body response include protein adsorption, adhesion of monocytes/macrophages, fusion to form FBGCs, and the consequent modification of the biomaterial surface. The effect of physico-chemical cues on macrophages is not well known and there is a complex interplay between biomaterial properties and those that result from interactions with the local environment. By having a better understanding of the role of macrophages in the tissue healing processes, especially in events that follow biomaterial implantation, we can design novel biomaterials-based tissue-engineered constructs that elicit a favorable immune response upon implantation and perform for their intended applications.
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Affiliation(s)
- Zeeshan Sheikh
- Faculty of Dentistry, Matrix Dynamics Group, University of Toronto, 150 College Street, Toronto, ON M5S 3E2, Canada.
| | - Patricia J Brooks
- Faculty of Dentistry, Matrix Dynamics Group, University of Toronto, 150 College Street, Toronto, ON M5S 3E2, Canada.
| | - Oriyah Barzilay
- Faculty of Dentistry, Matrix Dynamics Group, University of Toronto, 150 College Street, Toronto, ON M5S 3E2, Canada.
| | - Noah Fine
- Faculty of Dentistry, Matrix Dynamics Group, University of Toronto, 150 College Street, Toronto, ON M5S 3E2, Canada.
| | - Michael Glogauer
- Faculty of Dentistry, Matrix Dynamics Group, University of Toronto, 150 College Street, Toronto, ON M5S 3E2, Canada.
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Watanabe T, Nakagawa E, Saito K, Ohshima H. Differences in Healing Patterns of the Bone-Implant Interface between Immediately and Delayed-Placed Titanium Implants in Mouse Maxillae. Clin Implant Dent Relat Res 2015; 18:146-60. [PMID: 25872947 DOI: 10.1111/cid.12280] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND There are no available data on the healing process at the bone-implant interface after immediate implant placement. PURPOSE This study aimed to establish an animal experimental model of titanium implants placed in mouse maxillae and compare the healing pattern of the bone-implant interface after immediate implant placement with that after delayed implant placement. MATERIALS AND METHODS Maxillary first molars (M1) from 4-week-old mice were extracted and replaced with the implant following drilling (immediate-placement group). In contrast, M1 from 2-week-old mice were extracted, followed by drilling and implantation after 4 weeks (delayed-placement group). The decalcified samples at 0-28 days after implantation were processed by immunohistochemistry, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling assay, and tartrate-resistant acid phosphatase histochemistry. The elements and bone volume of undecalcified samples were quantitatively analyzed by an electron probe microanalyzer. RESULTS Osseointegration was completed by 28 days after the procedure in both groups. There were no differences in contact area, bone loss at the cervical area, or rate of calcification at the bone-implant interface between the two groups. CONCLUSIONS This study found no significant differences in the chronological healing process at the bone-implant interface between the two groups at the cellular level.
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Affiliation(s)
- Taisuke Watanabe
- Division of Anatomy and Cell Biology of the Hard Tissue, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Eizo Nakagawa
- Division of Anatomy and Cell Biology of the Hard Tissue, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Kotaro Saito
- Division of Anatomy and Cell Biology of the Hard Tissue, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of the Hard Tissue, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Wang Y, Zhang Y, Miron RJ. Health, Maintenance, and Recovery of Soft Tissues around Implants. Clin Implant Dent Relat Res 2015; 18:618-34. [PMID: 25873299 DOI: 10.1111/cid.12343] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND The health of peri-implant soft tissues is one of the most important aspects of osseointegration necessary for the long-term survival of dental implants. PURPOSE To review the process of soft tissue healing around osseointegrated implants and discuss the maintenance requirements as well as the possible short-comings of peri-implant soft tissue integration. MATERIALS AND METHODS Literature search on the process involved in osseointegration, soft tissue healing and currently available treatment modalities was performed and a brief description of each process was provided. RESULTS The peri-implant interface has been shown to be less effective than natural teeth in resisting bacterial invasion because gingival fiber alignment and reduced vascular supply make it more vulnerable to subsequent peri-implant disease and future bone loss around implants. And we summarized common procedures which have been shown to be effective in preventing peri-implantitis disease progression as well as clinical techniques utilized to regenerate soft tissues with bone loss in advanced cases of peri-implantitis. CONCLUSION Due to the difference between peri-implant interface and natural teeth, clinicians and patients should pay more attention in the maintenance and recovery of soft tissues around implants.
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Affiliation(s)
- Yulan Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Yufeng Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Richard J Miron
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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Li J, Zhang K, Wu J, Zhang L, Yang P, Tu Q, Huang N. Tailoring of the titanium surface by preparing cardiovascular endothelial extracellular matrix layer on the hyaluronic acid micro-pattern for improving biocompatibility. Colloids Surf B Biointerfaces 2015; 128:201-210. [DOI: 10.1016/j.colsurfb.2015.01.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 12/19/2014] [Accepted: 01/07/2015] [Indexed: 01/14/2023]
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Du Z, Lee RSB, Hamlet S, Doan N, Ivanovski S, Xiao Y. Evaluation of the first maxillary molar post-extraction socket as a model for dental implant osseointegration research. Clin Oral Implants Res 2015; 27:1469-1478. [DOI: 10.1111/clr.12571] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/22/2015] [Indexed: 12/01/2022]
Affiliation(s)
- Zhibin Du
- Institute of Health and Biomedical Innovation; Queensland University of Technology; Kelvin Grove Brisbane Qld Australia
| | - Ryan S. B. Lee
- School of Dentistry and Oral Health; Griffith University; Southport Qld Australia
| | - Stephen Hamlet
- School of Dentistry and Oral Health; Griffith University; Southport Qld Australia
| | - Nghiem Doan
- Institute of Health and Biomedical Innovation; Queensland University of Technology; Kelvin Grove Brisbane Qld Australia
| | - Saso Ivanovski
- School of Dentistry and Oral Health; Griffith University; Southport Qld Australia
| | - Yin Xiao
- Institute of Health and Biomedical Innovation; Queensland University of Technology; Kelvin Grove Brisbane Qld Australia
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Chen J, Li Q, Xu J, Zhang L, Maitz MF, Li J. Thromboresistant and rapid-endothelialization effects of dopamine and staphylococcal protein A mediated anti-CD34 coating on 316L stainless steel for cardiovascular devices. J Mater Chem B 2015; 3:2615-2623. [PMID: 32262909 DOI: 10.1039/c4tb01825g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oriented immobilization surface of anti-CD34 antibodies displayed excellent affinity for EPCs and good anticoagulation performance.
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Affiliation(s)
- Jialong Chen
- Stomatologic Hospital & College
- Anhui Medical University
- Key Lab. of Oral Diseases Research of Anhui Province
- Hefei 230032
- China
| | - Quanli Li
- Stomatologic Hospital & College
- Anhui Medical University
- Key Lab. of Oral Diseases Research of Anhui Province
- Hefei 230032
- China
| | - Jianguang Xu
- Stomatologic Hospital & College
- Anhui Medical University
- Key Lab. of Oral Diseases Research of Anhui Province
- Hefei 230032
- China
| | - Le Zhang
- Stomatologic Hospital & College
- Anhui Medical University
- Key Lab. of Oral Diseases Research of Anhui Province
- Hefei 230032
- China
| | - Manfred F. Maitz
- Leibniz Institute of Polymer Research Dresden
- Max Bergmann Center of Biomaterials Dresden
- Dresden 01069
- Germany
| | - Jun Li
- College of Pharmacy
- Anhui Medical University
- Hefei 230032
- China
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Kettenberger U, Ston J, Thein E, Procter P, Pioletti DP. Does locally delivered Zoledronate influence peri-implant bone formation? – Spatio-temporal monitoring of bone remodeling in vivo. Biomaterials 2014; 35:9995-10006. [DOI: 10.1016/j.biomaterials.2014.09.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 09/01/2014] [Indexed: 11/27/2022]
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Du Z, Ivanovski S, Hamlet SM, Feng JQ, Xiao Y. The Ultrastructural Relationship Between Osteocytes and Dental Implants Following Osseointegration. Clin Implant Dent Relat Res 2014; 18:270-80. [DOI: 10.1111/cid.12257] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhibin Du
- Institute of Health and Biomedical Innovation; Queensland University of Technology; Brisbane Qld Australia
| | - Saso Ivanovski
- School of Dentistry and Oral Health; Griffith University; Gold Coast Qld Australia
| | - Stephen M. Hamlet
- School of Dentistry and Oral Health; Griffith University; Gold Coast Qld Australia
| | - Jian Q. Feng
- Baylor College of Dentistry; Texas A&M Health Science Center; Dallas TX USA
| | - Yin Xiao
- Institute of Health and Biomedical Innovation; Queensland University of Technology; Brisbane Qld Australia
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Oh KC, Moon HS, Lee JH, Park YB, Kim JH. Effects of alendronate on the peri-implant bone in rats. Oral Dis 2014; 21:248-56. [PMID: 24824878 DOI: 10.1111/odi.12258] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 04/26/2014] [Accepted: 04/28/2014] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The purpose of this study was to determine the effects of alendronate on the peri-implant bone in rat maxillae with the aid of micro-computed tomographic, histologic, and biochemical analyses. MATERIALS AND METHODS Thirty-six male Sprague-Dawley rats were used. After extraction of the maxillary first molars, each rat was given periodic subcutaneous injections of either alendronate (alendronate group) or saline (control group). Customized implants were placed bilaterally 4 weeks after these injections. The rats were sacrificed at either 4, 8, or 12 weeks after implantation (4-, 8-, and 12-week groups, respectively; n = 6 rats per group). Microcomputed tomographic and histologic analyses were conducted for all rats. Biochemical analyses were performed at four time points for the 12-week groups. RESULTS There were no significant differences between the groups on microcomputed tomographic and histologic analyses. All of the measured biochemical parameters tended to decrease over time, with significant differences among some time points within each group. The serum osteocalcin level was significantly lower in the 12-week alendronate group than in the control group (P < 0.05). CONCLUSIONS Three approaches were utilized in evaluating the effects of alendronate. It appears serum osteocalcin levels may serve as an adjuvant marker for this purpose, although further studies are required to confirm this.
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Affiliation(s)
- K C Oh
- Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Korea
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Park R, Kim JH, Choi H, Park YB, Jung HS, Moon HS. Effect of alendronate on bone remodeling around implant in the rat. J Adv Prosthodont 2013; 5:374-81. [PMID: 24353873 PMCID: PMC3865190 DOI: 10.4047/jap.2013.5.4.374] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 03/31/2013] [Accepted: 04/22/2013] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the effect of alendronates on bone remodeling around titanium implant in the maxilla of rats. MATERIALS AND METHODS The maxillary first molars were extracted and customized-titanium implants were placed immediately in thirty male Sprague-Dawley rats. The rats were divided into experimental (bisphosphonate) group and control group. At 4 weeks after implantation, the rats in the bisphosphonate group were subcutaneously injected with alendronate three times a week for 6 weeks where as the rats in control group were injected with saline. The rats were sacrificed at 1, 2, 3, 4, or 6 weeks after starting of injection and maxillary bones were collected subsequently. Alveolar bone remodeling around the implants were evaluated by radiographic and histologic analysis. Microarray analysis and immunohistomorphologic analysis were also performed on one rat, sacrificed at 6 weeks after starting of injection, from each group. Statistical analysis was performed using repeated measures analysis of variance and independent t test at a significance level of 5%. RESULTS There was no statistically significant difference in the bone area (%) around implant between the bisphosphonate group and the control group. However, the amount of empty lacuna was significantly increased in the bisphosphonate group, especially in the rats sacrificed at 4 weeks after starting of injection compared to that of the corresponding control group. The bisphosphonate group showed the same level of TRAP positive cell count, osteocalcin and angiopoietin 1 as the control group. CONCLUSION Alendronate may not decrease the amount of osteoclast. However, the significantly increased amount of empty lacuna in the bisphosphonate group may explain the suppression of bone remodeling in the bisphosphonate group.
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Affiliation(s)
- Ran Park
- Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Jee-Hwan Kim
- Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hyunmin Choi
- Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Young-Bum Park
- Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Han-Sung Jung
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hong-Seok Moon
- Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
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Thalji GN, Nares S, Cooper LF. Early molecular assessment of osseointegration in humans. Clin Oral Implants Res 2013; 25:1273-1285. [DOI: 10.1111/clr.12266] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2013] [Indexed: 11/29/2022]
Affiliation(s)
| | - Salvador Nares
- Department of Periodontics; University of North Carolina; Chapel Hill NC USA
| | - Lyndon F. Cooper
- Department of Prosthodontics; University of North Carolina; Chapel Hill NC USA
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Rapuano BE, MacDonald DE. Structure-activity relationship of human bone sialoprotein peptides. Eur J Oral Sci 2013; 121:600-9. [PMID: 24103036 DOI: 10.1111/eos.12081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2013] [Indexed: 01/29/2023]
Abstract
In the current study, the relationship between the structure of the RGD-containing human bone sialoprotein (hBSP) peptide 278-293 and its attachment activity toward osteoblast-like (MC3T3) cells was investigated. This goal was accomplished by examining the comparative cell-attachment activities of several truncated forms of peptide 278-293. Computer modeling of the various peptides was also performed to assess the role of secondary structure in peptide bioactivity. Elimination of tyrosine-278 at the N-terminus resulted in a more dramatic loss of cell-attachment activity compared with the removal of either tyrosine-293 or the arg-ala-tyr (291-293) tripeptide. Although replacement of the RGD (arg-gly-asp) peptide moiety with peptide KAE (lys-ala-glu) resulted in a dramatic loss of cell-attachment activity, a peptide containing RGE (arg-gly-glu) in place of RGD retained 70-85% of the parental peptide's attachment activity. These results suggest that the N-terminal RGD-flanking region of hBSP peptide 278-293, in particular the tyrosine-278 residue, represents a second cell-attachment site that stabilizes the RGD-integrin receptor complex. Computer modeling also suggested that a β-turn encompassing RGD or RGE in some of the hBSP peptides may facilitate its binding to integrins by increasing the exposure of the tripeptide. This knowledge may be useful in the future design of biomimetic peptides which are more effective in promoting the attachment of osteogenic cells to implant surfaces in vivo.
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Affiliation(s)
- Bruce E Rapuano
- Hospital for Special Surgery affiliated with the Weill Medical College of Cornell University, New York, NY, USA
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Meirelles L, Brånemark PI, Albrektsson T, Feng C, Johansson C. Histological evaluation of bone formation adjacent to dental implants with a novel apical chamber design: preliminary data in the rabbit model. Clin Implant Dent Relat Res 2013; 17:453-60. [PMID: 24020511 DOI: 10.1111/cid.12139] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Wound healing events after implant placement will vary according to the extent of the necrotic zone. PURPOSE The goal of the present study was to evaluate bone healing around titanium implants with a novel apical chamber design. MATERIALS AND METHODS Titanium implants grade 4 were turned with different apex design. Control implants had a self tapping design with centric cutting grooves. Test implants exhibited eccentric cutting grooves interconnected by a hollow chamber. A total of 60 implants were installed in the femur/tibia of 10 rabbits for histological analysis. RESULTS After 1 week, immature bone formation started at the cortical level of the test implants associated to scalloped contours indicative of bone resorption. Control implants failed to show new bone formation, and the space within the threads was filled mainly by red blood cells and surgical debris. Bone contact values showed no difference after 1 week, and significant higher values for test implants showed likewise after 4 weeks compared with control implants in the tibia. CONCLUSION This experimental study verifies the beneficial effect of bone formation in the chamber at the apical part of the fixture coupled to a faster bone healing to implants placed in dense bone.
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Affiliation(s)
- Luiz Meirelles
- Eastman Institute for Oral Health, University of Rochester, Rochester, NY, USA
| | - Per-Ingvar Brånemark
- Brånemark Osseointegration Center, Göteborg, Sweden.,P-I Brånemark Institute, Bauru, Brazil
| | - Tomas Albrektsson
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Materials Science & Technology, Malmö University, Malmö, Sweden
| | - Changyong Feng
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, USA
| | - Carina Johansson
- Department of Prosthodontics/Dental Material Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Huang Y, Van Dessel J, Liang X, Depypere M, Zhong W, Ma G, Lambrichts I, Maes F, Jacobs R. Effects of immediate and delayed loading on peri-implant trabecular structures: a cone beam CT evaluation. Clin Implant Dent Relat Res 2013; 16:873-83. [PMID: 23551564 DOI: 10.1111/cid.12063] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
PURPOSE To develop a method for characterizing trabecular bone microarchitecture using cone beam computed tomography (CBCT) and to evaluate trabecular bone changes after rehabilitation using immediate versus delayed implant protocols. MATERIALS AND METHODS Six mongrel dogs randomly received 27 titanium implants in the maxillary incisor or mandibular premolar areas, following one of four protocols: (1) normal extraction socket healing; (2) immediate implant placement and immediate loading; (3) delayed implant placement and delayed loading; (4) delayed implant placement and immediate loading. The animals were euthanized at 8 weeks, and block biopsies were scanned using high resolution CBCT. Standard bone structural variables were assessed in coronal, middle, and apical levels. RESULTS Coronal and middle regions had more compact, more platelike, and thicker trabeculae. Protocols (2), (3), and (4) had significantly higher values (p < 0.001) than protocol (1) for bone surface density, bone surface volume ratio, and connectivity density, while significantly lower values (p < 0.001) were found for trabecular separation and fractal dimension. However, protocols (2), (3), and (4) did not show significantly different bone remodeling. CONCLUSIONS Compared with normal extraction healing, the implant protocols have an improved bone structural integration. Results do not suggest a different bone remodeling pattern when a delayed versus an immediate implant protocol is used.
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Affiliation(s)
- Yan Huang
- Oral Imaging Center, Department of Oral Health Science, KU Leuven, Leuven, Belgium; Oral Implant Center, West China College of Stomatology, Sichuan University, Chengdu, China
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Zainali K, Danscher G, Jakobsen T, Baas J, Møller P, Bechtold JE, Soballe K. Assessment of modified gold surfaced titanium implants on skeletal fixation. J Biomed Mater Res A 2012; 101:195-202. [PMID: 22847873 DOI: 10.1002/jbm.a.34307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/20/2012] [Accepted: 05/22/2012] [Indexed: 11/11/2022]
Abstract
Noncemented implants are the primary choice for younger patients undergoing total hip replacements. However, the major concern in this group of patients regarding revision is the concern from wear particles, periimplant inflammation, and subsequently aseptic implant loosening. Macrophages have been shown to liberate gold ions through the process termed dissolucytosis. Furthermore, gold ions are known to act in an anti-inflammatory manner by inhibiting cellular NF-κB-DNA binding. The present study investigated whether partial coating of titanium implants could augment early osseointegration and increase mechanical fixation. Cylindrical porous coated Ti-6Al-4V implants partially coated with metallic gold were inserted in the proximal region of the humerus in ten canines and control implants without gold were inserted in contralateral humerus. Observation time was 4 weeks. Biomechanical push out tests and stereological histomorphometrical analyses showed no statistically significant differences in the two groups. The unchanged parameters are considered an improvement of the coating properties, as a previous complete gold-coated implant showed inferior mechanical fixation and reduced osseointegration compared to control titanium implants in a similar model. Since sufficient early mechanical fixation is achieved with this new coating, it is reasonable to investigate the implant further in long-term studies.
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Affiliation(s)
- Kasra Zainali
- Department of Orthopaedics, Orthopaedic Research Center, Aarhus University Hospital, Aarhus C, Denmark.
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Chen X, Bai C, Xie L, Zhang Y, Wang K. Inflammatory response to orthopedic biomaterials after total hip replacement. J Orthop Sci 2012; 17:407-12. [PMID: 22573214 DOI: 10.1007/s00776-012-0234-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Accepted: 04/11/2012] [Indexed: 11/24/2022]
Abstract
BACKGROUND The aim of the present study was to investigate early inflammatory response in the first 3 days after the implantation of hip prostheses, and to compare the early inflammation responses associated with the use of different combinations of bearing materials. METHODS 34 patients were enrolled, all of whom underwent unilateral total hip replacement and had identical hip prostheses, except for the bearing materials. These consisted of polyethylene on alumina (n = 8), polyethylene on CoCr (n = 11), or alumina on alumina (n = 15). Blood samples were collected preoperatively in the morning of the day of surgery, and at 6 h, 1 day, 2 days, and 3 days postoperatively. CK, CRP, and IL-6 in peripheral blood were measured. Pain score was obtained at 2 days after surgery. RESULTS There were no significant differences in the pre- and postoperative background variables among the groups. Pain scores of different groups were not significantly different either (P > 0.05). There were also no significant differences in the levels of CK, CRP, and IL-6 when patients with the three combinations of bearing materials were compared. CONCLUSIONS We concluded that varying the bearing materials used in the hip prosthesis did not influence the early inflammatory response after prosthesis implantation.
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Affiliation(s)
- Xu Chen
- Department of Orthopedic Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
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Orsini E, Salgarello S, Martini D, Bacchelli B, Quaranta M, Pisoni L, Bellei E, Joechler M, Ottani V. Early healing events around titanium implant devices with different surface microtopography: a pilot study in an in vivo rabbit model. ScientificWorldJournal 2012; 2012:349842. [PMID: 22545015 PMCID: PMC3322675 DOI: 10.1100/2012/349842] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 10/21/2011] [Indexed: 11/17/2022] Open
Abstract
In the present pilot study, the authors morphologically investigated sandblasted, acid-etched surfaces (SLA) at very early experimental times. The tested devices were titanium plate-like implants with flattened wide lateral sides and jagged narrow sides. Because of these implant shape and placement site, the device gained a firm mechanical stability but the largest portion of the implant surface lacked direct contact with host bone and faced a wide peri-implant space rich in marrow tissue, intentionally created in order to study the interfacial interaction between metal surface and biological microenvironment. The insertion of titanium devices into the proximal tibia elicited a sequence of healing events. Newly formed bone proceeded through an early distance osteogenesis, common to both surfaces, and a delayed contact osteogenesis which seemed to follow different patterns at the two surfaces. In fact, SLA devices showed a more osteoconductive behavior retaining a less dense blood clot, which might be earlier and more easily replaced, and leading to a surface-conditioning layer which promotes osteogenic cell differentiation and appositional new bone deposition at the titanium surface. This model system is expected to provide a starting point for further investigations which clarify the early cellular and biomolecular events occurring at the metal surface.
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Affiliation(s)
- Ester Orsini
- Department of Human Anatomical Sciences and Physiopathology of Locomotor Apparatus, Human Anatomy Section, University of Bologna, via Irnerio 48, 40126 Bologna, Italy.
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Vignoletti F, Abrahamsson I. Quality of reporting of experimental research in implant dentistry. Critical aspects in design, outcome assessment and model validation. J Clin Periodontol 2012; 39 Suppl 12:6-27. [DOI: 10.1111/j.1600-051x.2011.01830.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fabio Vignoletti
- Department of Periodontology; Faculty of Odontology; Complutense University of Madrid; Madrid; Spain
| | - Ingemar Abrahamsson
- Department of Periodontology; Institute of Odontology; The Sahlgrenska Academy; University of Gothenburg; Gothenburg; Sweden
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Biofunctionalization of titanium with PEG and anti-CD34 for hemocompatibility and stimulated endothelialization. J Colloid Interface Sci 2012; 368:636-47. [DOI: 10.1016/j.jcis.2011.11.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 11/15/2011] [Accepted: 11/16/2011] [Indexed: 11/23/2022]
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50
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Ballo A, Agheli H, Lausmaa J, Thomsen P, Petronis S. Nanostructured model implants for in vivo studies: influence of well-defined nanotopography on de novo bone formation on titanium implants. Int J Nanomedicine 2011; 6:3415-28. [PMID: 22267926 PMCID: PMC3260035 DOI: 10.2147/ijn.s25867] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
An implantable model system was developed to investigate the effects of nanoscale surface properties on the osseointegration of titanium implants in rat tibia. Topographical nanostructures with a well-defined shape (semispherical protrusions) and variable size (60 nm, 120 nm and 220 nm) were produced by colloidal lithography on the machined implants. Furthermore, the implants were sputter-coated with titanium to ensure a uniform surface chemical composition. The histological evaluation of bone around the implants at 7 days and 28 days after implantation was performed on the ground sections using optical and scanning electron microscopy. Differences between groups were found mainly in the new bone formation process in the endosteal and marrow bone compartments after 28 days of implantation. Implant surfaces with 60 nm features demonstrated significantly higher bone-implant contact (BIC, 76%) compared with the 120 nm (45%) and control (57%) surfaces. This effect was correlated to the higher density and curvature of the 60 nm protrusions. Within the developed model system, nanoscale protrusions could be applied and systematically varied in size in the presence of microscale background roughness on complex screw-shaped implants. Moreover, the model can be adapted for the systematic variation of surface nanofeature density and chemistry, which opens up new possibilities for in vivo studies of various nanoscale surface-bone interactions.
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Affiliation(s)
- Ahmed Ballo
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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