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Micheletti C, DiCecco LA, Deering J, Chen W, Ervolino da Silva AC, Shah FA, Palmquist A, Okamoto R, Grandfield K. Mesoscale characterization of osseointegration around an additively manufactured genistein-coated implant. Sci Rep 2024; 14:15339. [PMID: 38961115 PMCID: PMC11222380 DOI: 10.1038/s41598-024-66058-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 06/26/2024] [Indexed: 07/05/2024] Open
Abstract
Given the hierarchical nature of bone and bone interfaces, osseointegration, namely the formation of a direct bone-implant contact, is best evaluated using a multiscale approach. However, a trade-off exists between field of view and spatial resolution, making it challenging to image large volumes with high resolution. In this study, we combine established electron microscopy techniques to probe bone-implant interfaces at the microscale and nanoscale with plasma focused ion beam-scanning electron microscopy (PFIB-SEM) tomography to evaluate osseointegration at the mesoscale. This characterization workflow is demonstrated for bone response to an additively manufactured Ti-6Al-4V implant which combines engineered porosity to facilitate bone ingrowth and surface functionalization via genistein, a phytoestrogen, to counteract bone loss in osteoporosis. SEM demonstrated new bone formation at the implant site, including in the internal implant pores. At the nanoscale, scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy confirmed the gradual nature of the bone-implant interface. By leveraging mesoscale analysis with PFIB-SEM tomography that captures large volumes of bone-implant interface with nearly nanoscale resolution, the presence of mineral ellipsoids varying in size and orientation was revealed. In addition, a well-developed lacuno-canalicular network and mineralization fronts directed both towards the implant and away from it were highlighted.
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Affiliation(s)
- Chiara Micheletti
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada.
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Liza-Anastasia DiCecco
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Joseph Deering
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | - Wanqi Chen
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada
| | | | - Furqan A Shah
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Anders Palmquist
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Roberta Okamoto
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University, Araçatuba, SP, Brazil
- Research Productivity Scholarship (Process: 309408/2020-2), Araçatuba, SP, Brazil
| | - Kathryn Grandfield
- Department of Materials Science and Engineering, McMaster University, Hamilton, ON, Canada.
- School of Biomedical Engineering, McMaster University, Hamilton, ON, Canada.
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, ON, Canada.
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Toscano RA, Barbosa S, Campos LG, de Sousa CA, Dallazen E, Mourão CF, Shibli JA, Ervolino E, Faverani LP, Assunção WG. The Addition of Hydroxyapatite Nanoparticles on Implant Surfaces Modified by Zirconia Blasting and Acid Etching to Enhance Peri-Implant Bone Healing. Int J Mol Sci 2024; 25:7321. [PMID: 39000425 PMCID: PMC11242766 DOI: 10.3390/ijms25137321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 06/24/2024] [Accepted: 06/28/2024] [Indexed: 07/16/2024] Open
Abstract
This study investigated the impact of adding hydroxyapatite nanoparticles to implant surfaces treated with zirconia blasting and acid etching (ZiHa), focusing on structural changes and bone healing parameters in low-density bone sites. The topographical characterization of titanium discs with a ZiHa surface and a commercially modified zirconia-blasted and acid-etched surface (Zi) was performed using scanning electron microscopy, profilometry, and surface-free energy. For the in vivo assessment, 22 female rats were ovariectomized and kept for 90 days, after which one implant from each group was randomly placed in each tibial metaphysis of the animals. Histological and immunohistochemical analyses were performed at 14 and 28 days postoperatively (decalcified lab processing), reverse torque testing was performed at 28 days, and histometry from calcified lab processing was performed at 60 days The group ZiHa promoted changes in surface morphology, forming evenly distributed pores. For bone healing, ZiHa showed a greater reverse torque, newly formed bone area, and bone/implant contact values compared to group Zi (p < 0.05; t-test). Qualitative histological and immunohistochemical analyses showed higher features of bone maturation for ZiHa on days 14 and 28. This preclinical study demonstrated that adding hydroxyapatite to zirconia-blasted and acid-etched surfaces enhanced peri-implant bone healing in ovariectomized rats. These findings support the potential for improving osseointegration of dental implants, especially in patients with compromised bone metabolism.
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Affiliation(s)
- Ricardo Alves Toscano
- Department of Diagnosis and Surgery, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Stéfany Barbosa
- Department of Diagnosis and Surgery, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Larissa Gabriele Campos
- Department of Diagnosis and Surgery, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Cecília Alves de Sousa
- Department of Dental Materials and Prosthodontics, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Eduardo Dallazen
- Department of Diagnosis and Surgery, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Carlos Fernando Mourão
- Department of Periodontology, School of Dentistry, Tufts University, Boston, MA 02111, USA
| | - Jamil Awad Shibli
- Dental Research Division, Department of Periodontology and Oral Implantology, University of Guarulhos (UnG), Guarulhos 07115-230, Brazil
| | - Edilson Ervolino
- Department of Basic Science, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16018-800, Brazil
| | - Leonardo P Faverani
- Department of Diagnosis and Surgery, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
| | - Wirley Goncalves Assunção
- Department of Dental Materials and Prosthodontics, Sao Paulo State University-UNESP, Aracatuba School of Dentistry, Sao Paulo 16015-050, Brazil
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Silva WPPD, Santos JMFE, Souza MCD, Barbosa S, Santos AMDS, Ervolino E, Bassi APF, Sukotjo C, Faverani LP. Ozone therapy improves early stages of osseointegration in ovariectomized rats. J Appl Oral Sci 2024; 32:e20230172. [PMID: 38536992 PMCID: PMC11018298 DOI: 10.1590/1678-7757-2023-0172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 01/24/2024] [Indexed: 04/17/2024] Open
Abstract
OBJECTIVE the aim of this study was to analyze the influence of ozone therapy (OZN) on peri-implant bone repair in critical bones by installing osseointegrated implants in the tibia of ovariectomized rats. METHODOLOGY ovariectomy was performed on 30 Wistar rats, aged six months (Rattus novergicus), and, after 90 days, osseointegrated implants were installed in each tibial metaphysis. The study groups were divided into the animals that received intraperitoneal ozone at a concentration of 700 mcg/kg - OZ Group (n=15) - and a control group that received an intraperitoneal saline solution and, for this reason, was named the SAL group (n=15). The applications for both groups occurred during the immediate post-operative period on the 2nd, 4th, 6th, 8th, 10th, and 12th day post-surgery. At various stages (14, 42, and 60 days), the animals were euthanized, and tests were performed on their tibiae. These tests include histomorphometric and immunohistochemical analyses, computerized microtomography, sampling in light-cured resin for calcified sections, and confocal microscopy. The obtained data were then analyzed using One-way ANOVA and the Shapiro-Wilk, Kruskal-Wallis, and student t-tests (P<0.05). RESULTS our findings indicate that the OZ group (3.26±0.20 mm) showed better cellular organization and bone neoformation at 14 days (SAL group, 0.90±1.42 mm) (P=0.001). Immunohistochemistry revealed that osteocalcin labeling was moderate in the OZ group and mild in the SAL group at 14 and 42 days post-surgery. The data from the analysis of calcified tissues (microtomography, histometric, and bone dynamism analysis) at 60 days showed no statistically significant differences between the groups (P=0.32). CONCLUSION it was concluded that ozone therapy anticipated the initial phases of the peri-implant bone repair process.
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Affiliation(s)
- William Phillip Pereira da Silva
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - João Matheus Fonseca E Santos
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Mônica Caroline de Souza
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Stéfany Barbosa
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Anderson Maikon de Souza Santos
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Edilson Ervolino
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, Brasil
| | - Ana Paula Farnezi Bassi
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Cortino Sukotjo
- University of Illinois, College of Dentistry, Department of Restorative Dentistry, Chicago, USA
| | - Leonardo P Faverani
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
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Inoue BKN, Paludetto LV, Monteiro NG, Batista FRDS, Kitagawa IL, da Silva RS, Antoniali C, Lisboa Filho PN, Okamoto R. Synergic Action of Systemic Risedronate and Local Rutherpy in Peri-implantar Repair of Ovariectomized Rats: Biomechanical and Molecular Analysis. Int J Mol Sci 2023; 24:16153. [PMID: 38003342 PMCID: PMC10671386 DOI: 10.3390/ijms242216153] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/03/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Postmenopausal osteoporosis and poor dietary habits can lead to overweightness and obesity. Bisphosphonates are the first-line treatment for osteoporosis. However, some studies show that they may increase the risk of osteonecrosis of the jaw. Considering the antimicrobial, angiogenic and vasodilatory potential of nitric oxide, this study aims to evaluate the local activity of this substance during the placement of surface-treated implants. Seventy-two Wistar rats were divided into three groups: SHAM (SHAM surgery), OVX + HD (ovariectomy + cafeteria diet), and OVX + HD + RIS (ovariectomy + cafeteria diet + sodium risedronate treatment), which were further subdivided according to the surface treatment of the future implant: CONV (conventional), TE10, or TE100 (TERPY at 10 or 100 μM concentration); n = 8 per subgroup. The animals underwent surgery for implant installation in the proximal tibia metaphysis and were euthanized after 28 days. Data obtained from removal torque and RT-PCR (OPG, RANKL, ALP, IBSP and VEGF expression) were subjected to statistical analysis at 5% significance level. For biomechanical analysis, TE10 produced better results in the OVX + HD group (7.4 N/cm, SD = 0.6819). Molecular analysis showed: (1) significant increase in OPG gene expression in OVX groups with TE10; (2) decreased RANKL expression in OVX + HD + RIS compared to OVX + HD; (3) significantly increased expressions of IBSP and VEGF for OVX + HD + RIS TE10. At its lowest concentration, TERPY has the potential to improve peri-implant conditions.
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Affiliation(s)
- Bruna Kaori Namba Inoue
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
| | - Laura Vidoto Paludetto
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
| | - Naara Gabriela Monteiro
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
| | - Fábio Roberto de Souza Batista
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
| | - Igor Lebedenco Kitagawa
- Federal Institute of Education, Science and Technology of São Paulo (IFSP), Birigui 16201-407, SP, Brazil;
| | - Roberto Santana da Silva
- Department of Biomolecular Sciences, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo—USP, Ribeirão Preto 14040-403, SP, Brazil;
| | - Cristina Antoniali
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
| | - Paulo Noronha Lisboa Filho
- Department of Physics and Meteorology, Bauru Sciences School, São Paulo State University Júlio de Mesquita Filho—UNESP, Bauru 17033-360, SP, Brazil;
| | - Roberta Okamoto
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015-050, SP, Brazil; (B.K.N.I.); (L.V.P.); (N.G.M.); (F.R.d.S.B.); (C.A.)
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Polo TOB, Fonseca-Santos JM, Momesso GAC, da Silva WPP, Barbosa S, Santos AMDS, Silva MC, Garcia VG, Theodoro LH, Faverani LP. Single intraoperative infrared laser optimized bone repair in rat femoral osteotomies with experimentally induced osteoporosis. Lasers Med Sci 2023; 38:87. [PMID: 36935455 DOI: 10.1007/s10103-023-03746-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 03/06/2023] [Indexed: 03/21/2023]
Abstract
This study aimed to evaluate the effect of infrared laser (IRL) on bone repair in ovariectomized rats subjected to femoral osteotomies. Of 32 rats, half underwent bilateral ovariectomy (OVX) and the other half underwent sham ovariectomy (SHAM). A period of 3 months was defined to observe the presence of osteoporosis. The rats were subjected to osteotomies in the femurs and then fixed with a miniplate and 1.5-mm system screws. Thereafter, half of the rats from both SHAM and OVX groups were not irradiated, and the other half were irradiated by IRL using the following parameters: wavelength, 808 nm; power, 100 mW; 60 s for each point; 6 J/point; and a total of 5 points of bone gap. All animals were euthanized 60 days after surgery. The femur gap was scanned using micro-computed tomography (micro-CT). The samples were then examined under a confocal laser microscope to determine the amounts of calcein and alizarin red. The slides were stained with alizarin red and Stevenel's blue for histometric analysis. In the micro-CT analysis, the OVX groups had the lowest bone volume (P < 0.05). When the laser was applied to the OVX groups, bone turnover increased (P < 0.05). New bone formation (NBF) was comparable between SHAM and OVX/IR (P > 0.05) groups; however, it was less in the OVX groups (P < 0.05). In conclusion, the results encourage the use of IRL intraoperatively as it optimizes bone repair, mainly in animals with low bone mineral density.
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Affiliation(s)
- Tárik Ocon Braga Polo
- School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | | | - Gustavo Antonio Correa Momesso
- School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
- Department of Implantology, University of Santo Amaro, Unisa, São Paulo, SP, Brazil
| | | | - Stefany Barbosa
- School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | | | - Mirela Caroline Silva
- School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Valdir Gouveia Garcia
- Diagnosis and Surgery Department, School of Dentistry, São Paulo State University (UNESP), 1193 José Bonifácio Street, Araçatuba, São Paulo, 16015-050, Brazil
| | - Letícia Helena Theodoro
- Diagnosis and Surgery Department, School of Dentistry, São Paulo State University (UNESP), 1193 José Bonifácio Street, Araçatuba, São Paulo, 16015-050, Brazil
| | - Leonardo P Faverani
- Diagnosis and Surgery Department, School of Dentistry, São Paulo State University (UNESP), 1193 José Bonifácio Street, Araçatuba, São Paulo, 16015-050, Brazil.
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The Local Release of Teriparatide Incorporated in 45S5 Bioglass Promotes a Beneficial Effect on Osteogenic Cells and Bone Repair in Calvarial Defects in Ovariectomized Rats. J Funct Biomater 2023; 14:jfb14020093. [PMID: 36826892 PMCID: PMC9964758 DOI: 10.3390/jfb14020093] [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: 11/06/2022] [Revised: 01/24/2023] [Accepted: 02/01/2023] [Indexed: 02/11/2023] Open
Abstract
With the increase in the population's life expectancy, there has also been an increase in the rate of osteoporosis, which has expanded the search for strategies to regenerate bone tissue. The ultrasonic sonochemical technique was chosen for the functionalization of the 45S5 bioglass. The samples after the sonochemical process were divided into (a) functionalized bioglass (BG) and (b) functionalized bioglass with 10% teriparatide (BGT). Isolated mesenchymal cells (hMSC) from femurs of ovariectomized rats were differentiated into osteoblasts and submitted to in vitro tests. Bilateral ovariectomy (OVX) and sham ovariectomy (Sham) surgeries were performed in fifty-five female Wistar rats. After a period of 60 days, critical bone defects of 5.0 mm were created in the calvaria of these animals. For biomechanical evaluation, critical bone defects of 3.0 mm were performed in the tibias of some of these rats. The groups were divided into the clot (control) group, the BG group, and the BGT group. After the sonochemical process, the samples showed modified chemical topographic and morphological characteristics, indicating that the surface was chemically altered by the functionalization of the particles. The cell environment was conducive to cell adhesion and differentiation, and the BG and BGT groups did not show cytotoxicity. In addition, the experimental groups exhibited characteristics of new bone formation with the presence of bone tissue in both periods, with the BGT group and the OVX group statistically differing from the other groups (p < 0.05) in both periods. Local treatment with the drug teriparatide in ovariectomized animals promoted positive effects on bone tissue, and longitudinal studies should be carried out to provide additional information on the biological performance of the mutual action between the bioglass and the release of the drug teriparatide.
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Ma H, Lyu H, Xu L, Hou J, Wang X, Li W, Li X. Augmented corticotomy-assisted presurgical orthodontic treatment to prevent alveolar bone loss in patients with skeletal Class III malocclusion. Am J Orthod Dentofacial Orthop 2023; 163:210-221. [PMID: 36328904 DOI: 10.1016/j.ajodo.2021.10.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/01/2021] [Accepted: 10/01/2021] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The objective of this study was to explore the effect of augmented corticotomy (AC) on anterior alveolar bone morphology in presurgical orthodontic treatment for skeletal Class III malocclusion. METHODS Thirty-six surgical patients with skeletal Class III malocclusion with high-angle were included: 18 (AC group) accepted AC surgery during presurgical orthodontic treatment, and 18 (control group) accepted traditional presurgical orthodontic treatment. Cone-beam computed tomography scans were obtained before treatment (T0) and after presurgical orthodontic treatment (T1). The alveolar bone morphology, root length, dehiscence, and movement of mandibular central incisors were measured by cone-beam computed tomography using Dolphin software. Statistical analyses were performed with independent-sample t tests, paired t tests, and multiple linear regression. RESULTS After presurgical orthodontic treatment, the whole alveolar bone thickness at each level, alveolar bone area, and alveolar bone height decreased significantly in the control group but increased or remained unchanged in the AC group. In the AC group, the lower the labial alveolar bone height at T0 was, the greater the increase after T1; the change in alveolar bone thickness was related to ΔL1-MP and sex. At T0, the incidences of dehiscence were similar in the 2 groups, ranging from 11.11% to 16.67%. At T1, the labial and lingual incidences of dehiscence in the AC group were 0% and 27.78%, compared with 55.56% and 66.67% in the control group. CONCLUSIONS During presurgical orthodontic treatment, AC is effective in preventing alveolar bone resorption and dehiscence without additional root resorption. AC can be recommended for high-angle skeletal Class III patients with thin alveolar bone around anterior teeth during presurgical orthodontic treatment.
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Affiliation(s)
- Huimin Ma
- Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Hangmiao Lyu
- Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Li Xu
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Jianxia Hou
- Department of Periodontology, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Xiaoxia Wang
- Department of Oral and Maxillofacial Surgery, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Weiran Li
- Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
| | - Xiaotong Li
- Department of Orthodontics, National Engineering Laboratory for Digital and Material Technology of Stomatology, and Beijing Key Laboratory of Digital Stomatology, Peking University School and Hospital of Stomatology, Beijing, China.
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Borges JS, Costa VC, Irie MS, de Rezende Barbosa GL, Spin-Neto R, Soares PBF. Definition of the Region of Interest for the Assessment of Alveolar Bone Repair Using Micro-computed Tomography. J Digit Imaging 2023; 36:356-364. [PMID: 36070014 PMCID: PMC9984626 DOI: 10.1007/s10278-022-00693-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 10/14/2022] Open
Abstract
The objective of this study was to evaluate the influence of the extraction socket (distal or lingual root) and the type of region of interest (ROI) definition (manual or predefined) on the assessment of alveolar repair following tooth extraction using micro-computed tomography (micro-CT). The software package used for scanning, reconstruction, reorientation, and analysis of images (NRecon®, DataViewer®, CT-Analyzer®) was acquired through Bruker < https://www.bruker.com > . The sample comprised the micro-CT volumes of seven Wistar rat mandibles, in which the right first molar was extracted. The reconstructed images were analyzed using the extraction sockets, i.e., the distal and intermediate lingual root and the method of ROI definition: manual (MA), central round (CR), and peripheral round (PR). The bone volume fraction (BV/TV) values obtained were analyzed by two-way ANOVA with Tukey's post hoc test (α = 5%). The distal extraction socket resulted in significantly lower BV/TV values than the intermediate lingual socket for MA (P = 0.001), CR (P < 0.001), and PR (P < 0.001). Regarding the ROI, when evaluating the distal extraction socket, the BV/TV was significantly higher (P < 0.001) for MA than for CR and PR, with a lower BV/TV for CR. However, no significant difference was observed for MA (P = 0.855), CR (P = 0.769), or PR (P = 0.453) in the intermediate lingual extraction socket. The bone neoformation outcome (BV/TV) for alveolar bone repair after tooth extraction is significantly influenced by the ROI and the extraction socket. Using the predefined method with a standardized ROI in the central region of the distal extraction socket resulted in the assessment of bone volume, demonstrating the most critical region of the bone neoformation process.
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Affiliation(s)
- Juliana Simeão Borges
- Department of Periodontology and Implantology, School of Dentistry, Federal University of Uberlândia, Avenida Pará s/n°, Campus Umuarama, Bloco 4L, Bairro Umuarama, Uberlândia, Minas Gerais, 38400-902, Brazil
| | - Vitor Cardoso Costa
- Department of Periodontology and Implantology, School of Dentistry, Federal University of Uberlândia, Avenida Pará s/n°, Campus Umuarama, Bloco 4L, Bairro Umuarama, Uberlândia, Minas Gerais, 38400-902, Brazil
| | - Milena Suemi Irie
- Department of Periodontology and Implantology, School of Dentistry, Federal University of Uberlândia, Avenida Pará s/n°, Campus Umuarama, Bloco 4L, Bairro Umuarama, Uberlândia, Minas Gerais, 38400-902, Brazil
| | | | - Rubens Spin-Neto
- Department of Dentistry and Oral Health, Section for Oral Radiology, Health, Aarhus University, Aarhus, Denmark
| | - Priscilla Barbosa Ferreira Soares
- Department of Periodontology and Implantology, School of Dentistry, Federal University of Uberlândia, Avenida Pará s/n°, Campus Umuarama, Bloco 4L, Bairro Umuarama, Uberlândia, Minas Gerais, 38400-902, Brazil.
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Frigério PB, Gomes-Ferreira PHS, de Souza Batista FR, Moura J, Rangel Garcia Júnior I, Botticelli D, Lisboa-Filho PN, Okamoto R. Effect of Topical PTH 1-34 Functionalized to Biogran ® in the Process of Alveolar Repair in Rats Submitted to Orchiectomy. MATERIALS (BASEL, SWITZERLAND) 2021; 15:207. [PMID: 35009347 PMCID: PMC8746260 DOI: 10.3390/ma15010207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/23/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
(1) Background: There are many therapies for osteoporosis control and bone maintenance; anabolic drugs such as teriparatide and bone grafts help in the repair process and stimulate bone formation. Thus, the aim of the present study was to evaluate the behavior of repaired bone in the presence of PTH (teriparatide) associated with Biogran® (biomaterial) through a sonochemical procedure after extraction in rats. (2) Methods: The insertion of Biogran® with PTH in the alveolus was performed 30 days after incisor extraction. Euthanasia occurred after 60 days. (3) Results: The use of local treatment of PTH loaded with Biogran® in healthy rats promoted good results for micro-CT, with an increase in percentage and bone volume, number and trabecular separation and less total porosity. Greater immunostaining for Wnt, β-Catenin and osteocalcin proteins and lower expression for Thrombospondin-Related Adhesive Protein (TRAP), which shows an increase in the number of osteoblasts and inhibition of osteoclast action. However, the treated orchiectomized groups did not obtain such expressive results. (4) Conclusion: The use of Biogran® with PTH improved alveolar repair in rats. However, new researches with more efficient doses must be studied to collaborate effectively with the formation of a quality bone after the orchiectomy.
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Affiliation(s)
- Paula Buzo Frigério
- Department of Diagnosis and Surgery, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil; (P.H.S.G.-F.); (F.R.d.S.B.); (J.M.); (I.R.G.J.)
| | - Pedro Henrique Silva Gomes-Ferreira
- Department of Diagnosis and Surgery, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil; (P.H.S.G.-F.); (F.R.d.S.B.); (J.M.); (I.R.G.J.)
| | - Fábio Roberto de Souza Batista
- Department of Diagnosis and Surgery, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil; (P.H.S.G.-F.); (F.R.d.S.B.); (J.M.); (I.R.G.J.)
| | - Juliana Moura
- Department of Diagnosis and Surgery, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil; (P.H.S.G.-F.); (F.R.d.S.B.); (J.M.); (I.R.G.J.)
| | - Idelmo Rangel Garcia Júnior
- Department of Diagnosis and Surgery, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil; (P.H.S.G.-F.); (F.R.d.S.B.); (J.M.); (I.R.G.J.)
| | | | - Paulo Noronha Lisboa-Filho
- Department of Physics, School of Sciences, São Paulo State University Júlio de Mesquita Filho—UNESP, Bauru 17033360, SP, Brazil;
| | - Roberta Okamoto
- Department of Basic Sciences, Araçatuba Dental School, São Paulo State University Júlio de Mesquita Filho—UNESP, Aracatuba 16015050, SP, Brazil;
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Park S, Heo HA, Kim KW, Pyo SW. Expression of osteogenic markers after administration of selective estrogen receptor modulators during implant placement in the osteoporotic rat maxilla. J Oral Sci 2021; 64:53-58. [PMID: 34955485 DOI: 10.2334/josnusd.21-0316] [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: 11/01/2022]
Abstract
PURPOSE This study examined the effects of raloxifene during bone formation around the dental implant in the ovariectomy-induced osteoporotic rat maxilla. METHODS Fifty-four female 10-week-old Sprague-Dawley rats were divided into three groups (n = 18 each); sham-operated (control), ovariectomized (OVX), and ovariectomized and raloxifene-administered (RAL). Eight weeks after ovariectomy, both upper first molars were extracted, and implants were placed 4 weeks post-extraction. The RAL group was given 1 mg/kg of raloxifene per day while the other groups received a vehicle. Six rats in each group were sacrificed at days 4, 7, and 14 and submitted for quantitative reverse transcription polymerase chain reaction and immunohistochemical staining, for evaluation of osteogenic genes expressions. RESULTS The alkaline phosphatase expression was upregulated in the RAL group compared to the OVX group at day 4. The osteocalcin expression was significantly higher between the RAL group and the OVX group at day 7. Immunohistochemical staining revealed increased expression during the initial bone-forming process and indicated more active bone formation in the RAL group than in the OVX group. CONCLUSION Raloxifene administration enhanced the osteogenic genes and proteins expression in the bone around the implant. Further studies are required to establish the long-term clinical effects of raloxifene administration.
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Affiliation(s)
- Suhyun Park
- Department of Dentistry, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea
| | - Hyun A Heo
- Department of Dentistry, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea
| | - Kyoung Wook Kim
- Department of Dentistry, Graduate School, The Catholic University of Korea
| | - Sung Woon Pyo
- Department of Dentistry, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea
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Ozonated oil effect for prevention of medication-related osteonecrosis of the jaw (MRONJ) in rats undergoing zoledronic acid therapy. Clin Oral Investig 2021; 25:6653-6659. [PMID: 33895916 DOI: 10.1007/s00784-021-03951-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 04/16/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the preventive effect of ozonated oil on the development of MRONJ-like lesions at tooth extraction sites in rats submitted to zoledronic acid treatment. MATERIALS AND METHODS Twelve rats were divided into two groups. Each rat received an injection of zoledronic acid solution once a week for 5 weeks before having its upper first molar extracted. In group 1, the clotted socket was maintained, while in the group 2, the socket was treated with ozonated oil for 10 min/day during 3 days. After euthanasia, block resection was performed for histological analysis. Necrotic bone was defined as the area of the bone with empty osteocyte lacunae and vital bone as the area with osteocyte-occupied lacunae. RESULTS There was no statistically significant difference between the groups in the average area of vital bone (p = 0.2248) and the average area of necrotic bone (p = 0.1208). However, the average area of vital bone in group 1 was smaller (24.1 ± 2.9 cells/cm2) than in group 2 (26.8 ± 4.2 cells/cm2), and the average area of necrotic bone in group 1 was higher (7.0 ± 2.5 cells/cm2) than in group 2 (4.0 ± 1.1 cells/cm2), indicating that ozonated oil may reduce the development of osteonecrosis. CONCLUSIONS Our findings suggest that ozonated oil might prevent MRONJ-like lesions at tooth extraction sites in rats submitted to a disease induction protocol. Further research should be conducted to confirm this hypothesis. CLINICAL RELEVANCE MRONJ has been reported as a complication of surgical dental procedures, and there are currently no predictable preventive therapies.
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Só BB, Silveira FM, Llantada GS, Jardim LC, Calcagnotto T, Martins MAT, Martins MD. Effects of osteoporosis on alveolar bone repair after tooth extraction: A systematic review of preclinical studies. Arch Oral Biol 2021; 125:105054. [PMID: 33667958 DOI: 10.1016/j.archoralbio.2021.105054] [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: 10/29/2020] [Revised: 01/15/2021] [Accepted: 01/16/2021] [Indexed: 12/09/2022]
Abstract
OBJECTIVE This systematic review aimed to address whether the alveolar socket repair after a tooth extraction is impacted by an osteoporotic phenotype and propose methodological observations. DESIGN A search strategy in MEDLINE/PubMed, EMBASE, Web of Science, and Scopus databases was performed. Quality assessment was carried out through the SYRCLE Risk of Bias tool. RESULTS Out of the 1147 potentially relevant records, 25 met the inclusion criteria. Most of the studies were performed in rats, and ovariectomy (OVX) was the most frequent osteoporosis induction method. Histomorphometry, micro-computed tomography (microCT), and immunohistochemistry were the main bone repair evaluation methods. Most of the included studies (88 %) presented negative impacts of osteoporosis on the alveolar socket repair. Only three studies (12 %) showed no statistical differences among groups. Overall, most of the quality assessment categories presented a high percentage of unclear risk of bias due to insufficient information in the studies. CONCLUSIONS The results indicated that an osteoporotic phenotype seems to impair alveolar socket repair after tooth extraction. However, there is still a lack of information and standardization. Therefore, further studies should consider the proposed methodological aspects regarding animal characteristics, OVX associated with a low calcium diet, waiting 8 weeks to osteoporosis induction, maxillary molars as the best option for tooth extraction, confirming and reporting OVX and osteoporosis success, and an appropriate method of repair analysis.
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Affiliation(s)
- Bruna Barcelos Só
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, R. Ramiro Barcelos, 2492, CEP: 90035-003, Porto Alegre, RS, Brazil
| | - Felipe Martins Silveira
- Oral Diagnosis Department, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, CEP: 13414-903, Piracicaba, SP, Brazil
| | - Gabriela Sauer Llantada
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, R. Ramiro Barcelos, 2492, CEP: 90035-003, Porto Alegre, RS, Brazil
| | - Luisa Comerlato Jardim
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, R. Ramiro Barcelos, 2492, CEP: 90035-003, Porto Alegre, RS, Brazil
| | - Thiago Calcagnotto
- Oral and Maxillofacial Surgery Department, FATEC Dental CEEO, Igrejinha, R. Independência, 290, CEP: 95650-000, RS, Brazil
| | - Marco Antonio Trevizani Martins
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, R. Ramiro Barcelos, 2492, CEP: 90035-003, Porto Alegre, RS, Brazil
| | - Manoela Domingues Martins
- Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, R. Ramiro Barcelos, 2492, CEP: 90035-003, Porto Alegre, RS, Brazil; Oral Diagnosis Department, Piracicaba Dental School, University of Campinas, Av. Limeira, 901, CEP: 13414-903, Piracicaba, SP, Brazil.
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Comparison between Plasma Electrolytic Oxidation Coating and Sandblasted Acid-Etched Surface Treatment: Histometric, Tomographic, and Expression Levels of Osteoclastogenic Factors in Osteoporotic Rats. MATERIALS 2020; 13:ma13071604. [PMID: 32244631 PMCID: PMC7178360 DOI: 10.3390/ma13071604] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 03/11/2020] [Accepted: 03/13/2020] [Indexed: 02/06/2023]
Abstract
Plasma electrolytic oxidation (PEO) has been a promising surface coating with better mechanical and antimicrobial parameters comparing to conventional treatment surfaces. This study evaluated the peri-implant bone repair using (PEO) surface coatings compared with sandblasted acid (SLA) treatment. For this purpose, 44 Wistar rats were ovariectomized (OVX-22 animals) or underwent simulated surgery (SS-22 animals) and received implants in the tibia with each of the surface coatings. The peri-implant bone subsequently underwent molecular, microstructural, bone turnover, and histometric analysis. Real-time PCR showed a higher expression of osteoprotegerin (OPG), receptor activator of nuclear kappa-B ligand (RANKL), and osteocalcin (OC) proteins in the SLA/OVX and PEO/SS groups (p < 0.05). Computed microtomography, confocal microscopy, and histometry showed similarity between the PEO and SLA surfaces, with a trend toward the superiority of PEO in OVX animals. Thus, PEO surfaces were shown to be promising for enhancing peri-implant bone repair in ovariectomized rats.
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Heo HA, Park S, Jeon YS, Pyo SW. Effect of Raloxifene Administration on Bone Response Around Implant in the Maxilla of Osteoporotic Rats. IMPLANT DENT 2019; 28:272-278. [DOI: 10.1097/id.0000000000000881] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Influence of Cigarette Smoke Inhalation on an Autogenous Onlay Bone Graft Area in Rats with Estrogen Deficiency: A Histomorphometric and Immunohistochemistry Study. Int J Mol Sci 2019; 20:ijms20081854. [PMID: 30991651 PMCID: PMC6515394 DOI: 10.3390/ijms20081854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 12/15/2022] Open
Abstract
PURPOSE The present study aimed to evaluate the influence of cigarette smoke inhalation on an autogenous onlay bone graft area, either covered with a collagen membrane or not, in healthy and estrogen-deficient rats through histomorphometry and immunohistochemistry. MATERIALS AND METHODS Sixty female rats (Wistar), weighing 250-300 g, were randomly divided and allocated into groups (either exposed to cigarette smoke inhalation or not, ovariectomized and SHAM). After 15 days, the test group underwent cigarette smoke inhalation. Sixty days after exposition, autogenous bone grafting was only performed on all right hemimandibles, and the left ones underwent autogenous onlay bone grafting with the collagen membrane (BioGide®). The graft was harvested from the parietal bone and attached to the animals' jaws (right and left). They were euthanized at 21, 45, and 60 days after grafting. Histological measurements and immunohistochemical analyses were performed, and results were submitted to a statistical analysis. RESULTS The addition of a collagen membrane to the bone graft proved more efficient in preserving graft area if compared to the graft area without a collagen membrane and the one associated with cigarette smoke inhalation at 21 (p = 0.0381) and 60 days (p = 0.0192), respectively. Cigarette smoke inhalation combined with ovariectomy promoted a significant reduction of the autogenous graft area at 21 and 60 days. At 45 days, no statistically significant results were observed. In the immunohistochemical analysis, the ovariectomized and smoking subgroups, combined or not with collagen membrane, received moderate and intense immunolabeling at 21 days for Receptor Activator of Nuclear Factor Kappa-B Ligand (RANKL) (p = 0.0017 and p = 0.0381, respectively). For Osteoprotegerin (OPG), intense immunolabeling was observed in most subgroups under analysis at 60 days. CONCLUSION Smoking inhalation promoted resorption on the autogenous onlay bone graft, mainly when associated with ovariectomy. Furthermore, when associated with the collagen membrane, a lower resorption rate was observed if compared to the absence of the membrane.
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de Oliveira D, de Oliveira Puttini I, Silva Gomes-Ferreira PH, Palin LP, Matsumoto MA, Okamoto R. Effect of intermittent teriparatide (PTH 1-34) on the alveolar healing process in orchiectomized rats. Clin Oral Investig 2018; 23:2313-2322. [DOI: 10.1007/s00784-018-2672-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 09/27/2018] [Indexed: 02/07/2023]
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17
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Hassumi JS, Mulinari-Santos G, Fabris ALDS, Jacob RGM, Gonçalves A, Rossi AC, Freire AR, Faverani LP, Okamoto R. Alveolar bone healing in rats: micro-CT, immunohistochemical and molecular analysis. J Appl Oral Sci 2018; 26:e20170326. [PMID: 29898174 PMCID: PMC6010327 DOI: 10.1590/1678-7757-2017-0326] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 12/11/2017] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION Alveolar bone healing after upper incisor extraction in rats is a classical model of preclinical studies. The underlying morphometric, cellular and molecular mechanism, however, remains imprecise in a unique study. OBJECTIVES The aim of this study was therefore to characterize the alveolar bone healing after upper incisor extraction in rats by micro computed tomographic (Micro-CT), immunohistochemical and real-time polymerase chain reaction (RT-PCR) analysis. MATERIAL AND METHODS Thirty animals (Rattus norvegicus, Albinus Wistar) were divided into three groups after upper incisors extraction at 7, 14, and 28 days. Micro-CT was evaluated based on the morphometric parameters. Subsequently, the histological analyses and immunostaining of osteoprotegerin (OPG), receptor activator of nuclear kappa B ligand (RANKL) and tartrate resistant acid phosphate (TRAP) was performed. In addition, RT-PCR analyses of OPG, RANKL, the runt-related transcription factor 2 (RUNX2), osteocalcin (OC), osteopontin (OPN), osterix (OST) and receptor activator of nuclear kappa B (RANK) were performed to determine the expression of these proteins in the alveolar bone healing. RESULTS Micro-CT: The morphometric parameters of bone volume and trabecular thickness progressively increased over time. Consequently, a gradual decrease in trabecular separation, trabecular space and total bone porosity was observed. Immunohistochemical: There were no differences statistically significant between the positive labeling for OPG, RANKL and TRAP in the different periods. RT-PCR: At 28 days, there was a significant increase in OPG expression, while RANKL expression and the RANKL/OPG ratio both decreased over time. CONCLUSION Micro-CT showed the newly formed bone had favorable morphometric characteristics of quality and quantity. Beyond the RUNX2, OC, OPN, OST, and RANK proteins expressed in the alveolar bone healing, OPG and RANKL activity showed to be essential for activation of basic multicellular units during the alveolar bone healing.
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Affiliation(s)
- Jaqueline Suemi Hassumi
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Gabriel Mulinari-Santos
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
| | - André Luis da Silva Fabris
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
| | - Ricardo Garcia Mureb Jacob
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
| | - Alaíde Gonçalves
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Ana Cláudia Rossi
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Morfologia, Piracicaba, São Paulo, Brasil
| | - Alexandre Rodrigues Freire
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Morfologia, Piracicaba, São Paulo, Brasil
| | - Leonardo Pérez Faverani
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
| | - Roberta Okamoto
- Univ. Estadual Paulista, Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
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Yogui FC, Momesso GAC, Faverani LP, Polo TOB, Ramalho-Ferreira G, Hassumi JS, Rossi AC, Freire AR, Prado FB, Okamoto R. A SERM increasing the expression of the osteoblastogenesis and mineralization-related proteins and improving quality of bone tissue in an experimental model of osteoporosis. J Appl Oral Sci 2018; 26:e20170329. [PMID: 29742257 PMCID: PMC5933824 DOI: 10.1590/1678-7757-2017-0329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/26/2017] [Accepted: 10/09/2017] [Indexed: 01/17/2023] Open
Abstract
Raloxifene is an antiresorptive drug, selective estrogen receptor modulator (SERM) used in the treatment of osteoporosis. Objective To evaluate proteins related to bone repair at the peri-implant bone in a rat model of osteoporosis treated with raloxifene. Material and Methods 72 rats were divided into three groups: SHAM (healthy animals), OVX (ovariectomized animals), and RLX (ovariectomized animals treated with raloxifene). Raloxifene was administered by gavage (1 mg/kg/day). Tibial implantation was performed 30 days after ovariectomy, and animals were euthanized at 14, 42, and 60 days postoperatively. Samples were collected and analyzed by immunohistochemical reactions, molecular analysis, and microtomographic parameters. Results RLX showed intense staining of all investigated proteins at both time points except for RUNX2. These results were similar to SHAM and opposite to OVX, showing mild staining. The PCR gene expression of OC and ALP values for RLX (P<0.05) followed by SHAM and OVX groups. For BSP data, the highest expression was observed in the RLX groups and the lowest expression was observed in the OVX groups (P<0.05). For RUNX2 data, RLX and SHAM groups showed greater values compared to OVX (P<0.05). At 60 days postoperatively, microtomography parameters, related to closed porosity, showed higher values for (Po.N), (Po.V), and (Po) in RLX and SHAM groups, whereas OVX groups showed lower results (P<0.05); (BV) values (P=0.009); regarding total porosity (Po.tot), RLX group had statistically significant lower values than OVX and SHAM groups (P=0.009). Regarding the open porosity (Po.V and Po), the SHAM group presented the highest values, followed by OVX and RLX groups (P<0.05). The Structural Model Index (SMI), RLX group showed a value closer to zero than SHAM group (P<0.05). Conclusions Raloxifene had a positive effect on the expression of osteoblastogenesis/mineralization-related proteins and on micro-CT parameters related to peri-implant bone healing.
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Affiliation(s)
- Fernanda Costa Yogui
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
| | - Gustavo Antonio Correa Momesso
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Leonardo Perez Faverani
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Tarik Ocon Braga Polo
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Gabriel Ramalho-Ferreira
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Jaqueline Suemi Hassumi
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Cirurgia e Clínica Integrada, Araçatuba, São Paulo, Brasil
| | - Ana Cláudia Rossi
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Anatomia, Piracicaba, SP, Brasil
| | - Alexandre Rodrigues Freire
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Anatomia, Piracicaba, SP, Brasil
| | - Felippe Bevilacqua Prado
- Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Departamento de Anatomia, Piracicaba, SP, Brasil
| | - Roberta Okamoto
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, São Paulo, Brasil
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Alhazmi KS, El-Bialy T, Afify AR, Merdad LA, Hassan AH. Ultrasound Enhances Dentoalveolar Remodeling in an Ex Vivo Orthodontic, Ovariectomy-Induced Osteoporotic Model. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:1963-1974. [PMID: 28651921 DOI: 10.1016/j.ultrasmedbio.2017.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 03/29/2017] [Accepted: 04/10/2017] [Indexed: 06/07/2023]
Abstract
The aim of the study was to investigate the effects of low-intensity pulsed ultrasound (LIPUS) on dentoalveolar structures during application of force to a cultured mandible slice taken from an ovariectomized rat model of osteoporosis. Rats were divided based on whether they had ovariectomy and/or LIPUS application into four groups: control osteoporosis group, control normal group, ultrasound-treated osteoporosis group and ultrasound-treated normal group. The mandibles were dissected, sliced and cultured before application of a 0.5-N force. Tissue specimens from five rats per group received LIPUS; the remaining rats served as untreated controls. Tissue sections were evaluated histologically and histomorphometrically. Osteoporosis significantly affected the alveolar bone without any effect on the dentin-pulp complex. LIPUS enhanced osteoporotic alveolar bone remodeling and increased cementum and predentin thickness. Furthermore, LIPUS application significantly increased odontoblast and periodontal ligament cell counts (p < 0.05) in both groups. Therefore, LIPUS enhances alveolar bone remolding and increases cementum and predentin formation in osteoporotic rat mandible slice organ cultures.
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Affiliation(s)
- Khuloud S Alhazmi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia; Saudi Arabia Ministry of Defense, Jeddah, Saudi Arabia
| | - Tarek El-Bialy
- Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Ahmed R Afify
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Leena A Merdad
- Department of Dental Public Health, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ali H Hassan
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
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Raloxifene but not alendronate can compensate the impaired osseointegration in osteoporotic rats. Clin Oral Investig 2017; 22:255-265. [DOI: 10.1007/s00784-017-2106-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
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Effect of antiresorptive drugs in the alveolar bone healing. A histometric and immunohistochemical study in ovariectomized rats. Clin Oral Investig 2016; 21:1485-1494. [PMID: 27460567 DOI: 10.1007/s00784-016-1909-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 07/07/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The aim of this study is to evaluate the alendronate and raloxifene influence in the alveolar healing process of osteoporotic rats. MATERIALS AND METHODS Sixty-four female rats were divided in four groups: sham rats (SHAM), ovariectomized rats and no medical treatment (OVX NT), ovariectomized rats and submitted to alendronate treatment (OVX ALE), and ovariectomized and submitted to raloxifene treatment (OVX RAL). The histomorphometrical and immunohistochemical analysis was performed. The quantitative data were analyzed through Kruskal-Wallis and Dunn tests (α = 0.05). RESULTS In the longest period, SHAM and OVX RAL groups showed the better bone formation responses (P < 0.05). The worst bone formation response was observed in the group OVX NT. OVX RAL group showed the better response at 42 days. OVX ALE group showed a favorable response at 14 days, in comparison with OVX RAL group, but a reduced response at 42 days. It was possible to observe a mature bone in SHAM group at 14 days and an immature bone in the OVX NT group. An intermediate quality bone was observed in the groups OVX ALE and OVX RAL. CONCLUSION Alendronate and raloxifene treatment improved the alveolar healing process in osteoporotic rats, but not enough to achieve the histometrical and protein expression values that were observed in the SHAM group. CLINICAL RELEVANCE Alendronate is largely used as a potent antiresorptive agent. Otherwise, considering the undesirable effects in relation to the alveolar healing, other antiosteoporosis medications should be studied. Raloxifene seems to be a good candidate once its action mechanism involves the activation of osteoblasts.
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Stringhetta-Garcia CT, Singulani MP, Santos LF, Louzada MJQ, Nakamune ACS, Chaves-Neto AH, Rossi AC, Ervolino E, Dornelles RCM. The effects of strength training and raloxifene on bone health in aging ovariectomized rats. Bone 2016; 85:45-54. [PMID: 26812611 DOI: 10.1016/j.bone.2015.11.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 11/09/2015] [Accepted: 11/28/2015] [Indexed: 11/23/2022]
Abstract
The aim of this study was to investigate the effects of strength training (ST) and raloxifene (Ral), alone or in combination, on the prevention of bone loss in an aging estrogen-deficient rat model. Aging Wistar female rats were ovariectomized at 14months and allocated to four groups: (1) non-trained and treated with vehicle, NT-Veh; (2) strength training and treated with vehicle, ST-Veh; (3) non-trained and treated with raloxifene, NT-Ral; and (4) strength training and treated with raloxifene, ST-Ral. ST was performed on a ladder three times per week and Ral was administered daily by gavage (1mg/kg/day), both for 120days. Areal bone mineral density (aBMD), strength, microarchitecture, and biomarkers (osteocalcin, OCN; osteoprotegerin, OPG; and tartrate-resistant acid phosphatase, TRAP) were assessed. Immunohistochemistry was performed for runt-related transcription factor 2 (RUNX2), osterix (OSX), OCN, OPG, TRAP, and receptor activator of nuclear factor kappa-B ligand (RANKL). The rats that performed ST (ST-Veh) or were treated with Ral (NT-Ral) showed significant improvements in aBMD (p=0.001 and 0.004), bone strength (p=0.001), and bone microarchitecture, such as BV/TV (%) (p=0.001), BS/TV (mm(2)/mm(3)) (p=0.023 and 0.002), Conn.Dn (1/mm(3)) (p=0.001), Tb.N (1/mm) (p=0.012 and 0.011), Tb.Th (1/mm) (p=0.001), SMI (p=0.001 and 0.002), Tb.Sp (p=0.001), and DA (p=0.002 and 0.007); there was also a significant decrease in plasma levels of OCN (p=0.001 and 0.002) and OPG (p=0.003 and 0.014), compared with animals in the NT-Veh group. Ral, with or without ST, promoted an increased immunolabeling pattern for RUNX2 (p=0.0105 and p=0.0006) and OSX (p=0.0105), but a reduced immunolabeling pattern for TRAP (p=0.0056) and RANKL (p=0.033 and 0.004). ST increased the immunolabeling pattern for RUNX2 (p=0.0105), and association with Ral resulted in an increased immunolabeling pattern for OPG (p=0.0034) and OCN (p=0.0024). In summary, ST and Ral administration in aged, estrogen-deficient Wistar female rats is associated with a decrease in bone turnover marker plasma levels, increased activity of cells that promote osteoblastogenesis, and decreased activity of cells that promote osteoclastogenesis; these are correlated with higher aBMD, bone strength, and bone microarchitecture at the femoral neck. The results indicate that strength training and Ral are potential tools to reduce the risk of fractures at clinically relevant sites.
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Affiliation(s)
| | | | | | - Mário Jefferson Quirino Louzada
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas; Faculdade de Medicina Veterinária de Araçatuba, UNESP - Univ Estadual Paulista, Campus de Araçatuba, Departamento de Apoio, Produção e Saúde Animal
| | - Ana Cláudia Stevanato Nakamune
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas; Faculdade de Odontologia de Araçatuba, UNESP - Univ Estadual Paulista, Campus de Araçatuba, Departamento de Ciências Básicas
| | - Antonio Hernandes Chaves-Neto
- Faculdade de Odontologia de Araçatuba, UNESP - Univ Estadual Paulista, Campus de Araçatuba, Departamento de Ciências Básicas
| | - Ana Cláudia Rossi
- Faculdade de Odontologia de Piracicaba, UNICAMP - Univ de Campinas, Campus de Piracicaba, Departamento de Morfologia
| | - Edilson Ervolino
- Faculdade de Odontologia de Araçatuba, UNESP - Univ Estadual Paulista, Campus de Araçatuba, Departamento de Ciências Básicas
| | - Rita Cássia Menegati Dornelles
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas; Faculdade de Odontologia de Araçatuba, UNESP - Univ Estadual Paulista, Campus de Araçatuba, Departamento de Ciências Básicas
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Guimarães MV, Melo IM, Adriano Araújo VM, Tenazoa Wong DV, Roriz Fonteles CS, Moreira Leal LKA, Ribeiro RA, Lima V. Dry Extract of Matricaria recutita L. (Chamomile) Prevents Ligature-Induced Alveolar Bone Resorption in Rats via Inhibition of Tumor Necrosis Factor-α and Interleukin-1β. J Periodontol 2016; 87:706-15. [PMID: 26777767 DOI: 10.1902/jop.2016.150411] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Matricaria recutita L. (chamomile) has demonstrated anti-inflammatory activity. Accordingly, the ability of the Matricaria recutita extract (MRE) to inhibit proinflammatory cytokines and its influence on alveolar bone resorption (ABR) in rats. METHODS Wistar rats were subjected to ABR by ligature with nylon thread in the second upper-left molar, with contralateral hemiarcade as control. Rats received polysorbate TW80 (vehicle) or MRE (10, 30, and 90 mg/kg) 1 hour before ligature and daily until day 11. The periodontium was analyzed by macroscopy, histometry, histopathology, and immunohistochemistry for the receptor activator of nuclear factor-kappa B ligand (RANKL), osteoprotegerin (OPG), and tartrate-resistant acid phosphatase (TRAP). The gingival tissue was used to quantify the myeloperoxidase (MPO) activity and tumor necrosis factor (TNF)-α and interleukin (IL)-1β levels by enzyme-linked immunosorbent assay. Blood samples were collected to evaluate bone-specific alkaline phosphatase (BALP), leukogram, and dosages of aspartate and alanine transaminases, urea, and creatinine. Aspects of liver, kidneys, spleen, and body mass variations were also evaluated. RESULTS The 11 days of ligature induced bone resorption, low levels of BALP, leukocyte infiltration; increase of MPO, TNF-α, and IL-1β; immunostaining increase for RANKL and TRAP; reduction of OPG and leukocytosis, which were significantly prevented by MRE, except for the low levels of BALP and the leukocytosis. Additionally, MRE did not alter organs or body weights of rats. CONCLUSION MRE prevented the inflammation and ABR by reducing TNF-α and IL-1β, preventing the osteoclast activation via the RANKL-OPG axis, without interfering with bone anabolism.
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Affiliation(s)
- Mariana Vasconcelos Guimarães
- Department of Clinical Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Dentistry Course, Unileão University Center, Juazeiro do Norte, Ceará, Brazil
| | - Iracema Matos Melo
- Department of Clinical Dentistry, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | | | | | | | | | | | - Vilma Lima
- Department of Physiology and Pharmacology, Federal University of Ceará
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Oryan A, Kamali A, Moshiri A. Potential mechanisms and applications of statins on osteogenesis: Current modalities, conflicts and future directions. J Control Release 2015; 215:12-24. [DOI: 10.1016/j.jconrel.2015.07.022] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 07/19/2015] [Accepted: 07/20/2015] [Indexed: 12/15/2022]
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Ramalho-Ferreira G, Faverani LP, Prado FB, Garcia IR, Okamoto R. Raloxifene enhances peri-implant bone healing in osteoporotic rats. Int J Oral Maxillofac Surg 2015; 44:798-805. [PMID: 25813087 DOI: 10.1016/j.ijom.2015.02.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 01/07/2015] [Accepted: 02/23/2015] [Indexed: 10/23/2022]
Abstract
The aim of this study was to evaluate bone healing at the bone-implant interface in rats with induced osteoporosis. The rats underwent a bilateral ovariectomy (OVX) and were fed a low calcium and phosphate diet. The OVX rats were divided into three groups: one was treated with raloxifene (OVX-RAL), one with alendronate (OVX-ALE), and one received no medication (OVX-NT). The control group rats (SHAM-DN) underwent sham surgery and were fed a normal diet. Each animal received one implant in each tibia: a machined surface implant in the right tibia and an implant with surface etching in the left tibia. All animals were euthanized after 42 days. Analysis of variance (ANOVA) and Tukey post hoc tests were applied to the biomechanics (reverse torque) and bone-implant contact (BIC) data (P<0.05). The RAL and ALE groups showed improved peri-implant bone healing. However, the ALE group showed no significant difference from the OVX-NT group. Surface treatment promoted higher corticalization at the bone-implant interface, but showed the same characteristics of mature bone and bone neoformation in concentric laminations as the machined implant. There were no statistically significant differences in reverse torque (P=0.861) or BIC (P=0.745) between the OVX-RAL and SHAM-DN groups. Therefore, the use of raloxifene resulted in good biomechanical, BIC, and histological findings in the treatment of induced osteoporosis in rats.
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Affiliation(s)
- G Ramalho-Ferreira
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, Universidade Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil
| | - L P Faverani
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, Universidade Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil.
| | - F B Prado
- Department of Morphology, Piracicaba Dental School, University of Campinas, UNICAMP, Piracicaba, São Paulo, Brazil
| | - I R Garcia
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, Universidade Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil
| | - R Okamoto
- Department of Basic Sciences, Araçatuba Dental School, Universidade Estadual Paulista - UNESP, Araçatuba, São Paulo, Brazil
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Hypertension modifies OPG, RANK, and RANKL expression during the dental socket bone healing process in spontaneously hypertensive rats. Clin Oral Investig 2015; 19:1319-27. [PMID: 25563972 DOI: 10.1007/s00784-014-1369-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2014] [Accepted: 11/13/2014] [Indexed: 10/24/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the dental socket bone healing process by histomorphometric and immunohistochemical analysis of osteoprotegerin (OPG), receptor activator of nuclear factor-κβ (RANK), and receptor activator of nuclear factor-κβ ligand (RANKL) proteins in spontaneously hypertensive rats (SHR). MATERIALS AND METHODS Under general anesthesia, 25 Wistar rats and 25 SHRs underwent upper right incisor extraction. Rats were euthanized after 7, 14, 21, 28, or 42 days of dental extractions. Histomorphometric and immunohistochemical analyses of OPG, RANK, and RANKL proteins were performed. RESULTS Histomorphometric results showed decreased bone healing and reduced bone trabecular thickness in SHRs. Immunohistochemical reactions showed intense RANKL and RANK immunolabeling at 14 and 28 postoperative days and mild OPG immunolabeling at 7, 14, and 21 days after surgery in SHRs. CONCLUSION The results of this study show that RANK, RANKL, and OPG immunolabeling was altered in SHRs, and these results are associated with bone healing delay and decreased trabecular thickness in SHRs. CLINICAL RELEVANCE Hypertension alters the expression of RANK, RANKL, and OPG and delays the socket bone healing process. These alterations could influence some dental procedures such as orthodontic treatment and implant placement.
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Effect of raloxifene on periapical lesions in ovariectomized rats. J Endod 2015; 41:671-5. [PMID: 25576209 DOI: 10.1016/j.joen.2014.11.027] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 10/01/2014] [Accepted: 11/29/2014] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the effect of raloxifene (RLX) during progression of periapical lesions in ovariectomized (OVX) rats. METHODS Female Wistar rats were OVX or subjected to sham surgery and received vehicle or RLX by gavage for 90 days. The treatment groups were as follows: sham surgery and treated with vehicle (SHAM-veh), OVX and treated with vehicle (OVX-veh), and OVX and treated with RLX (OVX-RLX). During treatment, the pulp of lower first molar was exposed to the oral environment for induction of periapical lesion that was analyzed 7 or 30 days after procedure. Blood samples were taken from jugular vein for measurement of estradiol, and the mandibles were removed and prepared for radiographic, histopathologic, histometric, and immunohistochemical analysis. RESULTS Estradiol plasma concentration showed hypoestrogenism in OVX rats. The histopathologic analysis of the OVX/RLX group was similar to that of the SHAM-veh group, whereas OVX-veh group showed larger periapical lesions with more intense inflammatory response and more cells positive for tartrate-resistant acid phosphatase. Radiographically, the groups were similar, but lesions on day 7 were smaller than lesions on day 30. CONCLUSIONS The results suggest that hypoestrogenism potentiates the progression of periapical lesions, and such condition was reversed by treatment with RLX.
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Gomes-Filho JE, Wayama MT, Dornelles RCM, Ervolino E, Yamanari GH, Lodi CS, Sivieri-Araújo G, Dezan-Júnior E, Cintra LTA. Raloxifene modulates regulators of osteoclastogenesis and angiogenesis in an oestrogen deficiency periapical lesion model. Int Endod J 2014; 48:1059-68. [PMID: 25354165 DOI: 10.1111/iej.12403] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 10/24/2014] [Indexed: 01/14/2023]
Abstract
AIM To analyse the local regulatory mechanisms of osteoclastogenesis and angiogenesis during the progression of periapical lesions in female rats with oestrogen deficiency and treatment with raloxifene (RLX). METHODOLOGY Female Wistar rats were distributed into groups: SHAM-veh, subjected to sham surgery and treated with a vehicle; OVX-veh, subjected to ovary removal and treated with a vehicle; and OVX-RLX, subjected to ovary removal and treated with RLX. Vehicle or RLX was administered orally for 90 days. During treatment, the dental pulp of mandibular first molars was exposed to the oral environment for induction of periapical lesions, which were analysed after 7 and 30 days. After the experimental periods, blood samples were collected for measurement of oestradiol, calcium, phosphorus and alkaline phosphatase. The rats were euthanized and the mandibles removed and processed for immunohistochemical detection of receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), hypoxia-inducible factor-1 alpha (HIF-1α) and bone-specific alkaline phosphatase (BALP). Data were compared using Kruskal-Wallis followed by Dunn test (nonparametric values) and anova followed by the Tukey's test (parametric values). RESULTS The plasma concentration of oestradiol showed hypo-oestrogenism in the rats subjected to ovary removal. On day 7, alkaline phosphatase activity, calcium and phosphorus were higher in the OVX-RLX group than in the OVX-veh group (P < 0.001), but immunolabelling for RANKL and HIF-1α was lower in OVX-RLX group (P < 0.001). On day 30, the OVX-veh group had higher immunolabelling for RANKL than the OVX-RLX group (P < 0.05). There were no significant differences in the immunoreactivity of OPG and BALP between any groups at either time-point (P > 0.05). CONCLUSION RLX therapy reversed the increased levels of the local regulators of both osteoclastogenesis and angiogenesis induced by oestrogen deficiency.
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Affiliation(s)
- J E Gomes-Filho
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - M T Wayama
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - R C M Dornelles
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - E Ervolino
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - G H Yamanari
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - C S Lodi
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - G Sivieri-Araújo
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - E Dezan-Júnior
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
| | - L T A Cintra
- Department of Endodontics, Araçatuba School of Dentistry, Univ. Estadual Paulista, Araçatuba, Brazil
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TERA TDM, PRADO RFD, DE MARCO AC, SANTAMARIA MP, JARDINI MAN. The RANK/ RANKL/ OPG interaction in the repair of autogenous bone grafts in female rats with estrogen deficiency. Braz Oral Res 2014; 28:S1806-83242014000100261. [DOI: 10.1590/1807-3107bor-2014.vol28.0054] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 06/24/2014] [Indexed: 11/22/2022] Open
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Abstract
Osteogenesis and bone remodeling are complex biological processes that are essential for the formation of new bone tissue and its correct functioning. When the balance between bone resorption and formation is disrupted, bone diseases and disorders such as Paget's disease, fibrous dysplasia, osteoporosis and fragility fractures may result. Recent advances in bone cell biology have revealed new specific targets for the treatment of bone loss that are based on the inhibition of bone resorption by osteoclasts or the stimulation of bone formation by osteoblasts. Bisphosphonates, antiresorptive agents that reduce bone resorption, are usually recommended as first-line therapy in women with postmenopausal osteoporosis. Numerous studies have shown that bisphosphonates are able to significantly reduce the risk of femoral and vertebral fractures. Other antiresorptive agents indicated for the treatment of osteoporosis include selective estrogen receptor modulators, such as raloxifene. Denosumab, a human monoclonal antibody, is another antiresorptive agent that has been approved in Europe and the USA. This agent blocks the RANK/RANKL/OPG system, which is responsible for osteoclastic activation, thus reducing bone resorption. Other approved agents include bone anabolic agents, such as teriparatide, a recombinant parathyroid hormone that improves bone microarchitecture and strength, and strontium ranelate, considered to be a dual-action drug that acts by both osteoclastic inhibition and osteoblastic stimulation. Currently, anti-catabolic drugs that act through the Wnt-β catenin signaling pathway, serving as Dickkopf-related protein 1 inhibitors and sclerostin antagonists, are also in development. This concise review provides an overview of the drugs most commonly used for the control of osteogenesis in bone diseases.
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Sartorato FAS, Mura CAM, Lucas SRR. Histometric evaluation of dental alveolar repair in malnourished rats in the intrauterine or postnatal phase. Arch Oral Biol 2014; 59:241-50. [PMID: 24581845 DOI: 10.1016/j.archoralbio.2013.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 11/19/2013] [Accepted: 11/25/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Nutritional aggravations during pregnancy or during the early stages of postnatal development can impair bone development; thus, we aimed to assess the effects of food restriction on the dental alveolar bone repair process using histometric analysis. DESIGN Thirty-six Wistar rats were divided into three groups: (C) 12 pups were obtained from control mothers with food intake at ease; (GR) 12 pups from mothers subjected to 70% food restriction during pregnancy; (PNR) 50% of maternal food restriction during lactation and 50% of restriction for the 12 pups after weaning. At three months of age, the upper right incisor was extracted from the pups. After 14 or 28 days, the pups were sacrificed for evaluation of newly formed bone area (NB) and total bone area (TA) in the medial and apical thirds of the alveolus. RESULTS In the apical third of the alveolus, the ratio of NB/TA was greater at 28 days for all groups and there was no damage to any of the groups. In the medial third, the ratio was higher at 28 days for the C and GR groups. The PNR group did not show an evolution of alveolar dental repair. Compared between the thirds, all groups exhibited a higher percentage of newly formed bone in the medial third area, at any time point after surgery. CONCLUSIONS The percentage of the total alveolar area covered by newly formed bone (NB/TA) revealed a late preference in the process of alveolar repair in the medial third, although only in the PNR group.
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Affiliation(s)
- Fábio A S Sartorato
- Laboratory of Developmental Biology, Department of Morphology and Genetics, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil.
| | - Cláudia A M Mura
- Laboratory of Developmental Biology, Department of Morphology and Genetics, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Sandra R R Lucas
- Laboratory of Developmental Biology, Department of Morphology and Genetics, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
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Yamamoto-Silva FP, Bradaschia-Correa V, Lima LA, Arana-Chavez VE. Ultrastructural and immunohistochemical study of early repair of alveolar sockets after the extraction of molars from alendronate-treated rats. Microsc Res Tech 2013; 76:633-40. [DOI: 10.1002/jemt.22210] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 02/15/2013] [Accepted: 03/02/2013] [Indexed: 11/10/2022]
Affiliation(s)
| | - Vivian Bradaschia-Correa
- Department of Biomaterials and Oral Biology; School of Dentistry; University of São Paulo; São Paulo; Brazil
| | - Luiz A.P.A. Lima
- Department of Stomatology; School of Dentistry; University of São Paulo; São Paulo; Brazil
| | - Victor E. Arana-Chavez
- Department of Biomaterials and Oral Biology; School of Dentistry; University of São Paulo; São Paulo; Brazil
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Macedo RM, Brentegani LG, de Lacerda SA. Effects of Caffeine on Bones of Osteoporotic Rats. JOURNAL OF CAFFEINE RESEARCH 2012. [DOI: 10.1089/jcr.2012.0027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Rander Moreira Macedo
- Department of Morphology, Stomatology and Physiology, Ribeirao Preto School of Dentistry, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Luiz Guilherme Brentegani
- Department of Morphology, Stomatology and Physiology, Ribeirao Preto School of Dentistry, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Suzie Aparecida de Lacerda
- Department of Morphology, Stomatology and Physiology, Ribeirao Preto School of Dentistry, University of Sao Paulo, Ribeirao Preto, Brazil
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Tan WL, Wong TLT, Wong MCM, Lang NP. A systematic review of post-extractional alveolar hard and soft tissue dimensional changes in humans. Clin Oral Implants Res 2012; 23 Suppl 5:1-21. [PMID: 22211303 DOI: 10.1111/j.1600-0501.2011.02375.x] [Citation(s) in RCA: 542] [Impact Index Per Article: 45.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Removal of teeth results in both horizontal and vertical changes of hard and soft tissue dimensions. The magnitude of these changes is important for decision-making and comprehensive treatment planning, with provisions for possible solutions to expected complications during prosthetic rehabilitation. OBJECTIVES To review all English dental literature to assess the magnitude of dimensional changes of both the hard and soft tissues of the alveolar ridge up to 12 months following tooth extraction in humans. METHODS An electronic MEDLINE and CENTRAL search complemented by manual searching was conducted to identify randomized controlled clinical trials and prospective cohort studies on hard and soft tissue dimensional changes after tooth extraction. Only studies reporting on undisturbed post-extraction dimensional changes relative to a fixed reference point over a clearly stated time period were included. Assessment of the identified studies and data extraction was performed independently by two reviewers. Data collected were reported by descriptive methods. Weighted means and percentages of the dimensional changes over time were calculated where appropriate. RESULTS The search provided 3954 titles and 238 abstracts. Full text analysis was performed for 104 articles resulting in 20 studies that met the inclusion criteria. In human hard tissue, horizontal dimensional reduction (3.79 ± 0.23 mm) was more than vertical reduction (1.24 ± 0.11 mm on buccal, 0.84 ± 0.62 mm on mesial and 0.80 ± 0.71 mm on distal sites) at 6 months. Percentage vertical dimensional change was 11-22% at 6 months. Percentage horizontal dimensional change was 32% at 3 months, and 29-63% at 6-7 months. Soft tissue changes demonstrated 0.4-0.5 mm gain of thickness at 6 months on the buccal and lingual aspects. Horizontal dimensional changes of hard and soft tissue (loss of 0.1-6.1 mm) was more substantial than vertical change (loss 0.9 mm to gain 0.4 mm) during observation periods of up to 12 months, when study casts were utilized as a means of documenting the changes. CONCLUSIONS Human re-entry studies showed horizontal bone loss of 29-63% and vertical bone loss of 11-22% after 6 months following tooth extraction. These studies demonstrated rapid reductions in the first 3-6 months that was followed by gradual reductions in dimensions thereafter.
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Affiliation(s)
- Wah Lay Tan
- Implant Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Implant Dentistry, Hong Kong, China
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OSTEOBLAST AND GINGIVAL FIBROBLAST MARKERS IN DENTAL IMPLANT STUDIES. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2011; 155:109-16. [DOI: 10.5507/bp.2011.021] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Luvizuto ER, Dias SSMD, Okamoto T, Dornelles RCM, Okamoto R. Raloxifene therapy inhibits osteoclastogenesis during the alveolar healing process in rats. Arch Oral Biol 2011; 56:984-90. [PMID: 21536255 DOI: 10.1016/j.archoralbio.2011.03.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/12/2011] [Accepted: 03/24/2011] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To investigate the expression of OPG, RANKL and TRAP during alveolar healing process (7, 14, 21, 28 and 42 postoperative days) in ovariectomized rats treated with raloxifene or with oestrogen replacement therapy, using immunohistochemistry reaction approach. MATERIALS AND METHODS Wistar female rats (10 weeks age) were submitted to ovariectomy surgery (OVX) or sham surgery. The female rats were divided in four groups: (1) sham; (2) OVX/O (ovariectomy and oil); (3) OVX/E2 (ovariectomy and oestrogen replacement); (4) OVX/RLX (ovariectomy and raloxifene therapy). RESULTS It was observed high amount of OPG immunolabelling with predominance at 14 and 21 postoperative days on sham and OVX/RLX groups, respectively. At 7 postoperative days, there was no difference between the groups for TRAP protein. Otherwise, to the other periods, it was observed greater expression of TRAP and RANKL protein on OVX/O group compared to sham, OVX/E2 and OVX/RLX groups. It was also observed a discrete TRAP immunolabelling at 28 and 42 postoperative days on OVX/RLX group. CONCLUSIONS Oestrogen deficiency induces osteoclastogenesis in the alveolar healing process. Quantitative changes in the osteoclastic activity could be prevented through the raloxifene therapy.
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Affiliation(s)
- Eloá R Luvizuto
- Department of Surgery and Integrated Clinic, Araçatuba Dental School, UNESP-Univ Estadual Paulista, Brazil.
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Shoji K, Elsubeihi ES, Heersche JN. Effects of ovariectomy on turnover of alveolar bone in the healed extraction socket in rat edentulous mandible. Arch Oral Biol 2011; 56:114-20. [DOI: 10.1016/j.archoralbio.2010.09.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 09/13/2010] [Accepted: 09/14/2010] [Indexed: 10/19/2022]
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