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Lee C, Lee A, Kim HS, Choi YJ, Jeon KJ, Han SS. Efficacy of corticosteroid ductal irrigation in acute salivary gland inflammation induced in a rat model. Imaging Sci Dent 2022; 52:61-66. [PMID: 35387106 PMCID: PMC8967498 DOI: 10.5624/isd.20210209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/25/2021] [Accepted: 10/04/2021] [Indexed: 11/18/2022] Open
Abstract
Purpose Materials and Methods Results Conclusion
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Affiliation(s)
- Chena Lee
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Ari Lee
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Hak-Sun Kim
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Yoon Joo Choi
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Kug Jin Jeon
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
| | - Sang-Sun Han
- Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Korea
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Righesso LAR, Terekhov M, Götz H, Ackermann M, Emrich T, Schreiber LM, Müller WEG, Jung J, Rojas JP, Al-Nawas B. Dynamic contrast-enhanced magnetic resonance imaging for monitoring neovascularization during bone regeneration-a randomized in vivo study in rabbits. Clin Oral Investig 2021; 25:5843-5854. [PMID: 33786647 PMCID: PMC8443511 DOI: 10.1007/s00784-021-03889-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 03/12/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Micro-computed tomography (μ-CT) and histology, the current gold standard methods for assessing the formation of new bone and blood vessels, are invasive and/or destructive. With that in mind, a more conservative tool, dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), was tested for its accuracy and reproducibility in monitoring neovascularization during bone regeneration. Additionally, the suitability of blood perfusion as a surrogate of the efficacy of osteoplastic materials was evaluated. MATERIALS AND METHODS Sixteen rabbits were used and equally divided into four groups, according to the time of euthanasia (2, 3, 4, and 6 weeks after surgery). The animals were submitted to two 8-mm craniotomies that were filled with blood or autogenous bone. Neovascularization was assessed in vivo through DCE-MRI, and bone regeneration, ex vivo, through μ-CT and histology. RESULTS The defects could be consistently identified, and their blood perfusion measured through DCE-MRI, there being statistically significant differences within the blood clot group between 3 and 6 weeks (p = 0.029), and between the former and autogenous bone at six weeks (p = 0.017). Nonetheless, no significant correlations between DCE-MRI findings on neovascularization and μ-CT (r =-0.101, 95% CI [-0.445; 0.268]) or histology (r = 0.305, 95% CI [-0.133; 0.644]) findings on bone regeneration were observed. CONCLUSIONS These results support the hypothesis that DCE-MRI can be used to monitor neovascularization but contradict the premise that it could predict bone regeneration as well.
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Affiliation(s)
- L A R Righesso
- Clinic for Oral and Maxillofacial Surgery and Plastic Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany.
| | - M Terekhov
- Molecular and Cellular Imaging, Comprehensive Heart Failure Center, University Hospital Würzburg, Josef-Schneider-Strasse 2, 97080, Würzburg, Germany
| | - H Götz
- Cell Biology Unit, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - M Ackermann
- Institute of Functional and Clinical Anatomy, University Medical Center of the Johannes Gutenberg University Mainz, Johann-Joachim-Becher-Weg 13, 55128, Mainz, Germany
| | - T Emrich
- Department of Radiology, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
- Medical University of South Carolina, 171 Ashley Avenue, Charleston, SC, 29425, USA
- German Center for Cardiovascular Research (DZHK), Partner-Site Rhine-Main, Potsdamer Strasse 58, 10785, Berlin, Germany
| | - L M Schreiber
- Molecular and Cellular Imaging, Comprehensive Heart Failure Center, University Hospital Würzburg, Josef-Schneider-Strasse 2, 97080, Würzburg, Germany
| | - W E G Müller
- Institute of Physiological Chemistry, University Medical Center of the Johannes Gutenberg University Mainz, Duesbergweg 6, 55128, Mainz, Germany
| | - J Jung
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University, 23, Kyung Hee Dae-ro, Dongdaemun-gu, Seoul, 02447, Republic of Korea
| | - J P Rojas
- Private Practice, Av. La Dehesa, 181, Santiago, Chile
| | - B Al-Nawas
- Clinic for Oral and Maxillofacial Surgery and Plastic Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Augustusplatz 2, 55131, Mainz, Germany
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Kostyshyn NM, Gzhegotskyi MR, Kostyshyn LP, Mudry SI. Effect of zoledronic acid on bone nanocomposites organization and prevention of bone mineral density loss in ovariectomized rats. Drug Metab Pers Ther 2021; 36:239-245. [PMID: 33770826 DOI: 10.1515/dmpt-2020-0187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 01/28/2021] [Indexed: 01/30/2023]
Abstract
OBJECTIVES Osteoporosis often occurs in individuals of different age groups, frequently during menopause and after ovariectomy. It increases the risk of pathological fractures almost twice. The aim of our research was to assess bone metabolism, nanocomposite structure of the tibia under conditions of ovariectomy and zoledronic acid treatment. METHODS X-ray diffraction has been performed for nanostructure analysis of mineral crystallites and crystal lattice of hydroxyapatite in the tibia samples of ovariectomized rats with additional application of bisphosphonate zoledronic acid (0.025 mg/kg). Markers of remodeling - osteocalcin, alkaline phosphatase, tartrate resistant acid phosphatase 5b - were determined. Quantitative amount of calcium in the bones was detected by atomic absorption method. RESULTS Zoledronic acid prevented loss of mineral mass after ovariectomy. Rats after ovariectomy, treated with zoledronic acid, showed statistically higher (р<0.05) values of crystalline phase and calcium content compared with the SHAM-surgery and ovariectomy groups (р<0.05). Zoledronic acid inhibited bone remodeling, which is proved by tartrate resistant acid phosphatase 5b reduction and inhibition of osteoclasts during the experiment. CONCLUSIONS These results enable to suggest that zoledronic acid can improve mineral mass of the bone during menopause in individuals of different age groups.
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Affiliation(s)
- Nazar M Kostyshyn
- Department of Normal Physiology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Mechyslav R Gzhegotskyi
- Department of Normal Physiology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Liybov P Kostyshyn
- Department of Toxicological and Analytical Chemistry, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Stepan I Mudry
- Department of Metal Physics, Ivan Franko National University, Lviv, Ukraine
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Bohner L, Tortamano P, Meier N, Gremse F, Kleinheinz J, Hanisch M. Trabecular Bone Assessment Using Magnetic-Resonance Imaging: A Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E9282. [PMID: 33322479 PMCID: PMC7763832 DOI: 10.3390/ijerph17249282] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/07/2020] [Accepted: 12/09/2020] [Indexed: 11/17/2022]
Abstract
The aim of this study was to assess trabecular bone morphology via magnetic-resonance imaging (MRI) using microcomputed tomography (µCT) as the control group. Porcine bone samples were scanned with T1-weighted turbo spin echo sequence imaging, using TR 25 ms, TE 3.5 ms, FOV 100 × 100 × 90, voxel size 0.22 × 0.22 × 0.50 mm, and scan time of 11:18. µCT was used as the control group with 80 kV, 125 mA, and a voxel size of 16 µm. The trabecular bone was segmented on the basis of a reference threshold value and morphological parameters. Bone volume (BV), Bone-volume fraction (BvTv), Bone specific surface (BsBv), trabecular thickness (TbTh), and trabecular separation (TbSp) were evaluated. Paired t-test and Pearson correlation test were performed at p = 0.05. MRI overestimated BV, BvTv, TbTh, and TbSp values. BsBv was the only parameter that was underestimated by MRI. High statistical correlation (r = 0.826; p < 0.05) was found for BV measurements. Within the limitations of this study, MRI overestimated trabecular bone parameters, but with a statistically significant fixed linear offset.
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Affiliation(s)
- Lauren Bohner
- Department of Cranio-Maxillofacial Surgery, University Hospital Muenster, 48149 Muenster, Germany; (J.K.); (M.H.)
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo 0508-000, Brazil;
| | - Pedro Tortamano
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo 0508-000, Brazil;
| | - Norbert Meier
- Institute of Clinical Radiology, University Clinics Muenster, 48149 Muenster, Germany;
| | - Felix Gremse
- Department of Experimental Molecular Imaging, Helmholtz Institute, RWTH Aachen University, 52074 Aachen, Germany;
| | - Johannes Kleinheinz
- Department of Cranio-Maxillofacial Surgery, University Hospital Muenster, 48149 Muenster, Germany; (J.K.); (M.H.)
| | - Marcel Hanisch
- Department of Cranio-Maxillofacial Surgery, University Hospital Muenster, 48149 Muenster, Germany; (J.K.); (M.H.)
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