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Abstract
Repair and functional reconstruction of large jawbone defects remain one of the challenges in the field of head and neck surgery. The recent progress in tissue engineering technologies and stem cell biology has significantly promoted the development of regenerative reconstruction of jawbone defects. The multiple trophic activities of extracellular vesicles (EVs) produced by mesenchymal stem cells (MSCs) may play a critical role in their therapeutic effects. Accumulating evidence has shown the promise of dental pulp stem cells (DPSCs) in bone regeneration, but less is known about the regenerative effects of DPSC-EVs on jawbone defects. The purpose of this study is to explore the osteogenic effects of DPSC-EVs on jawbone marrow-derived MSCs (JB-MSCs) in vitro and their osteoinductive effects in a mandibular bone defect model in rats. Our results showed that JB-MSCs could efficiently uptake DPSC-EVs, which in turn significantly promoted the expression of osteogenic genes, such as runt-related transcription factor 2 (RUNX2), alkaline phosphatase (ALP), and osteocalcin (OCN), as well as the osteogenic differentiation capability of JB-MSCs. Meanwhile, we found that the pro-osteogenic effect in vitro induced by DPSC-EVs was comparable to that induced by BMP-2 (bone morphogenetic protein 2), currently the only Food and Drug Administration-approved osteoinductive growth factor. In vivo, animals that were locally treated with DPSC-EVs laden with a commercially available collagen membrane exhibited a relatively fast wound closure and increased new bone density at the mandible defects. Our results provide evidence for the osteogenic and osteoinductive effects of DPSC-EVs on jawbone regeneration. Due to the accessibility, rapid proliferation, and osteogenic propensity of DPSCs, DPSC-EVs may represent a safe cell-free therapeutic approach for craniofacial bone regeneration.
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Affiliation(s)
- A E Lee
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - J G Choi
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Oral and Maxillofacial Surgery, NYU Langone Hospitals, New York, NY, USA
| | - S H Shi
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - P He
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Oral and Maxillofacial Surgery, Perelman Center for Advanced Medicine, Penn Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
| | - Q Z Zhang
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - A D Le
- Department of Oral and Maxillofacial Surgery and Pharmacology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Oral and Maxillofacial Surgery, Perelman Center for Advanced Medicine, Penn Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, USA
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2
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Wu V, Schulten EAJM, Helder MN, Ten Bruggenkate CM, Bravenboer N, Klein-Nulend J. Bone vitality and vascularization of mandibular and maxillary bone grafts in maxillary sinus floor elevation: A retrospective cohort study. Clin Implant Dent Relat Res 2023; 25:141-151. [PMID: 36214357 PMCID: PMC10092303 DOI: 10.1111/cid.13142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/19/2022] [Accepted: 09/26/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Mandibular retromolar (predominantly cortical) and maxillary tuberosity (predominantly cancellous) bone grafts are used in patients undergoing maxillary sinus floor elevation (MSFE) for dental implant placement. The aim of this retrospective cohort study was to investigate whether differences exist in bone formation and vascularization after grafting with either bone source in patients undergoing MSFE. METHODS Fifteen patients undergoing MSFE were treated with retromolar (n = 9) or tuberosity (n = 6) bone grafts. Biopsies were taken 4 months postoperatively prior to dental implant placement, and histomorphometrically analyzed to quantify bone and osteoid area, number of total, apoptotic, and receptor activator of nuclear factor-κB ligand (RANKL)-positive osteocytes, small and large-sized blood vessels, and osteoclasts. The grafted area was divided in three regions (caudal-cranial): RI, RII, and RIII. RESULTS Bone volume was 40% (RII, RIII) higher and osteoid volume 10% (RII) lower in retromolar compared to tuberosity-grafted areas. Total osteocyte number and number of RANKL-positive osteocytes were 23% (RII) and 90% (RI, RII) lower, but osteoclast number was higher (retromolar: 12, tuberosity: 0) in retromolar-grafted areas. The total number of blood vessels was 80% (RI) to 60% (RIII) lower, while the percentage of large-sized blood vessels was 86% (RI) to 25% (RIII) higher in retromolar-grafted areas. Number of osteocyte lacunae and apoptotic osteocytes were similar in both bone grafts used. CONCLUSIONS Compared to the retromolar bone, tuberosity bone showed increased bone vitality and vascularization in patients undergoing MSFE, likely due to faster bone remodeling or earlier start of new bone formation. Therefore, tuberosity bone grafts might perform better in enhancing bone regeneration.
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Affiliation(s)
- Vivian Wu
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Engelbert A J M Schulten
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Marco N Helder
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Christiaan M Ten Bruggenkate
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Nathalie Bravenboer
- Department of Clinical Chemistry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Jenneke Klein-Nulend
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
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3
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Saaby M, Nørholt SE, Küseler A, Hartlev J. Day Care Surgery for Unilateral Alveolar Bone Grafting of Residual Clefts With Mandibular Symphyseal Bone-A Prospective Questionnaire Study. Cleft Palate Craniofac J 2021; 59:216-221. [PMID: 33719611 DOI: 10.1177/1055665621999489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To evaluate patients' experiences of shortened hospitalization in relation to bone grafting of unilateral alveolar clefts with mandibular symphyseal bone grafts. DESIGN Prospective cohort questionnaire study. SETTING Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Denmark. PATIENTS Thirty-nine (male n = 26, female n = 13) patients with unilateral residual clefts after primary reconstruction, mean age 10.4 years. INTERVENTIONS All patients underwent a standardized procedure with closure of the alveolar defect using mandibular symphyseal bone grafts. Patients were discharged within a day after surgery. Within 24 hours after discharge from surgery, patients and their parents filled in a 14-item psychometric questionnaire assessing the quality of their recovery. For all questions, a visual analogue scale (VAS) (0-10) was used. MAIN OUTCOME MEASURE Patients' experience of shortened hospitalization in relation to secondary bone grafting of alveolar defects. Factors influencing the overall experience were measured using a VAS scale. RESULTS A significant correlation between "Information from the hospital" and feeling worried and anxious was found (P = .04). Additionally, the ability to sleep correlated with pain (P = .003) and with nausea (P = .001). CONCLUSIONS Although this study included a limited number of patients, the findings suggest that treatment of alveolar residual cleft with bone grafting from the mandibular symphyseal region in a day care surgery setting is characterized by very high patient satisfaction.
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Affiliation(s)
- Martin Saaby
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Denmark
| | - Sven Erik Nørholt
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Denmark.,Section for Oral Surgery and Oral Pathology, Department of Dentistry and Oral Health, Health, Aarhus University, Denmark
| | - Annelise Küseler
- Department of Dentistry and Oral Health, Aarhus University, Denmark.,Cleft Palate Centre Aarhus and Department of Oral and Maxillofacial Surgery, Aarhus University Hospital and Section of Orthodontics, Denmark
| | - Jens Hartlev
- Section for Oral Surgery and Oral Pathology, Department of Dentistry and Oral Health, Health, Aarhus University, Denmark
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Chen H, Hu X, Yang R, Wu G, Tan Q, Goltzman D, Miao D. SIRT1/FOXO3a axis plays an important role in the prevention of mandibular bone loss induced by 1,25(OH) 2D deficiency. Int J Biol Sci 2020; 16:2712-2726. [PMID: 33110391 PMCID: PMC7586429 DOI: 10.7150/ijbs.48169] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/11/2020] [Indexed: 02/07/2023] Open
Abstract
It has been reported that 1,25 dihydroxyvitamin D [1,25(OH)2D] deficiency leads to the loss of mandibular bone, however the mechanism is unclear. We investigated whether the Sirt1/FOXO3a signaling pathway is involved in this process. Using a 1,25(OH)2D deficiency model induced by genetic deletion in mice of 25-hydroxyvitamin D-1α hydroxylase [1α(OH)ase-/- mice]. We first documented a sharp reduction of expression levels of Sirt1 in the 1α(OH)ase-/- mice in vivo. Next, we demonstrated dose-dependent upregulation of Sirt1 by treatment with exogenous 1,25(OH)2D3in vitro. We then identified a functional VDR binding site in the Sirt1 promoter. By crossing Prx1-Sirt1 transgenic mice with 1α(OH)ase-/- mice we demonstrated that the overexpression of Sirt1 in mesenchymal stem cells (MSCs) greatly improved the 1α(OH)ase-/- mandibular bone loss phenotype by increasing osteoblastic bone formation and reducing osteoclastic bone resorption. In mechanistic studies, we showed, in 1α(OH)ase-/- mice, decreases of Sirt1 and FoxO3a, an increase in oxidative stress as reflected by a reduction of the antioxidant enzymes peroxiredoxin1 (Prdx1), SOD1 and SOD2 expression, and an increase of markers for osteocyte senescence and senescence associated secretory phenotypes (SASP), including β-galactosidase (β-gal), p16, p53 and p21. The targeted overexpression of Sirt1 in the 1α(OH)ase-/- mice restored the expression levels of these molecules. Finally, we demonstrated that a Sirt1 agonist can upregulate FOXO3a activity by increasing deacetylation and nuclear translocation. Overall, results from this study support the concept that targeted increases in Sirt1/FOXO3a signaling levels can greatly improve the bone loss caused by 1,25(OH)2D deficiency.
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Affiliation(s)
- Haiyun Chen
- The Research Center for Aging, Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Xiaoqing Hu
- The Research Center for Aging, Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Renlei Yang
- The Research Center for Aging, Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Guoping Wu
- The Research Center for Aging, Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing 210029, China
| | - Qian Tan
- Department of Burns and Plastic Surgery, The Drum Tower Clinical Medical College, Affiliated Drum Tower Hospital, Nanjing Medical University, Nanjing 210008, China
| | - David Goltzman
- Calcium Research Laboratory, McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec H3A 1A1, Canada
| | - Dengshun Miao
- The Research Center for Aging, Affiliated Friendship Plastic Surgery Hospital of Nanjing Medical University, Nanjing 210029, China
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Kitamura A, Kawasaki M, Kawasaki K, Meguro F, Yamada A, Nagai T, Kodama Y, Trakanant S, Sharpe PT, Maeda T, Takagi R, Ohazama A. Ift88 is involved in mandibular development. J Anat 2019; 236:317-324. [PMID: 31657471 DOI: 10.1111/joa.13096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2019] [Indexed: 12/16/2022] Open
Abstract
The mandible is a crucial organ in both clinical and biological fields due to the high frequency of congenital anomalies and the significant morphological changes during evolution. Primary cilia play a critical role in many biological processes, including the determination of left/right axis patterning, the regulation of signaling pathways, and the formation of bone and cartilage. Perturbations in the function of primary cilia are known to cause a wide spectrum of human diseases: the ciliopathies. Craniofacial dysmorphologies, including mandibular deformity, are often seen in patients with ciliopathies. Mandibular development is characterized by chondrogenesis and osteogenesis; however, the role of primary cilia in mandibular development is not fully understood. To address this question, we generated mice with mesenchymal deletions of the ciliary protein, Ift88 (Ift88fl/fl ;Wnt1Cre). Ift88fl/fl ;Wnt1Cre mice showed ectopic mandibular bone formation, whereas Ift88 mutant mandible was slightly shortened. Meckel's cartilage was modestly expanded in Ift88fl/fl ;Wnt1Cre mice. The downregulation of Hh signaling was found in most of the mesenchyme of Ift88 mutant mandible. However, mice with a mesenchymal deletion of an essential molecule for Hh signaling activity, Smo (Smofl/fl ;Wnt1Cre), showed only ectopic mandibular formation, whereas Smo mutant mandible was significantly shortened. Ift88 is thus involved in chondrogenesis and osteogenesis during mandibular development, partially through regulating Sonic hedgehog (Shh) signaling.
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Affiliation(s)
- Atsushi Kitamura
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Maiko Kawasaki
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Centre for Craniofacial Development and Regeneration, Dental Institute, Guy's Hospital, King's College London, London, UK
| | - Katsushige Kawasaki
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Centre for Craniofacial Development and Regeneration, Dental Institute, Guy's Hospital, King's College London, London, UK.,Research Center for Advanced Oral Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Fumiya Meguro
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Akane Yamada
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Takahiro Nagai
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yasumitsu Kodama
- Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Supaluk Trakanant
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Orthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Paul T Sharpe
- Centre for Craniofacial Development and Regeneration, Dental Institute, Guy's Hospital, King's College London, London, UK
| | - Takeyasu Maeda
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Research Center for Advanced Oral Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Faculty of Dental Medicine, University of Airlangga, Surabaya, Indonesia
| | - Ritsuo Takagi
- Division of Oral and Maxillofacial Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Atsushi Ohazama
- Division of Oral Anatomy, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Centre for Craniofacial Development and Regeneration, Dental Institute, Guy's Hospital, King's College London, London, UK
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Ohgo S, Ichinose S, Yokota H, Sato-Maeda M, Shoji W, Wada N. Tissue regeneration during lower jaw restoration in zebrafish shows some features of epimorphic regeneration. Dev Growth Differ 2019; 61:419-430. [PMID: 31468519 DOI: 10.1111/dgd.12625] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/26/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023]
Abstract
Zebrafish have the ability to regenerate skeletal structures, including the fin, skull roof, and jaw. Although fin regeneration proceeds by epimorphic regeneration, it remains unclear whether this process is involved in other skeletal regeneration in zebrafish. Initially in epimorphic regeneration, the wound epidermis covers the wound surface. Subsequently, the blastema, an undifferentiated mesenchymal mass, forms beneath the epidermis. In the present study, we re-examined the regeneration of the zebrafish lower jaw in detail, and investigated whether epimorphic regeneration is involved in this process. We performed amputation of the lower jaw at two different positions; the proximal level (presence of Meckel's cartilage) and the distal level (absence of Meckel's cartilage). In both manipulations, a blastema-like cellular mass was initially formed. Subsequently, cartilaginous aggregates were formed in this mass. In the proximal amputation, the cartilaginous aggregates were then fused with Meckel's cartilage and remained as a skeletal component of the regenerated jaw, whereas in the distal amputation, the cartilaginous aggregates disappeared as regeneration progressed. Two molecules that were observed during epimorphic regeneration, Laminin and msxb, were expressed in the regenerating lower jaw, although the domain of msxb expression was out of the main plain of the aggregate formation. Administration of an inhibitor of Wnt/β-catenin signaling, a pathway associated with epimorphic regeneration, showed few effects on lower jaw regeneration. Our finding suggests that skeletal regeneration of the lower jaw mainly progresses through tissue regeneration that is dependent on the position in the jaw, and epimorphic regeneration plays an adjunctive role in this regeneration.
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Affiliation(s)
- Shiro Ohgo
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Sayaka Ichinose
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Hinako Yokota
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba, Japan
| | - Mika Sato-Maeda
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Wataru Shoji
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Naoyuki Wada
- Department of Applied Biological Science, Tokyo University of Science, Noda, Chiba, Japan
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Veselá B, Švandová E, Bobek J, Lesot H, Matalová E. Osteogenic and Angiogenic Profiles of Mandibular Bone-Forming Cells. Front Physiol 2019; 10:124. [PMID: 30837894 PMCID: PMC6389724 DOI: 10.3389/fphys.2019.00124] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/31/2019] [Indexed: 11/24/2022] Open
Abstract
The mandible is a tooth-bearing structure involving one of the most prominent bones of the facial region. Mesenchymal cell condensation is the first morphological sign of osteogenesis, and several studies have focused on this stage also in the mandible. Little information is available about the early post-condensation period, during which avascular soft condensation turns into vascularized bone, and all three major bone cell types, osteoblasts, osteocytes, and osteoclasts, differentiate. In the mouse first lower molar region, the post-condensation period corresponds to the prenatal days 13–15. If during this critical period, when osteogenesis reaches the point of major bone cell differentiation, vascularization already has to play a critical role, one should be able to show molecular changes which support both types of cellular events. The aim of the present report was to follow in organ context the expression of major osteogenic and angiogenic markers and identify those that are up- or downregulated during this period. To this end, PCR Array was applied covering molecules involved in osteoblastic cell proliferation, commitment or differentiation, extracellular matrix (ECM) deposition, mineralisation, osteocyte maturation, angiogenesis, osteoclastic differentiation, and initial bone remodeling. From 161 analyzed osteogenic and angiogenic factors, the expression of 37 was altered when comparing the condensation stage with the bone stage. The results presented here provide a molecular survey of the early post-condensation stage of mandibular/alveolar bone development which has not yet been investigated in vivo.
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Affiliation(s)
- Barbora Veselá
- Laboratory of Molecular Morphogenesis, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia.,Department of Physiology, University of Veterinary and Pharmaceutical Sciences, Brno, Czechia
| | - Eva Švandová
- Laboratory of Molecular Morphogenesis, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia.,Department of Physiology, University of Veterinary and Pharmaceutical Sciences, Brno, Czechia
| | - Jan Bobek
- Laboratory of Molecular Morphogenesis, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia
| | - Hervé Lesot
- Laboratory of Molecular Morphogenesis, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia
| | - Eva Matalová
- Laboratory of Molecular Morphogenesis, Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Brno, Czechia.,Department of Physiology, University of Veterinary and Pharmaceutical Sciences, Brno, Czechia
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8
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Abstract
OBJECTIVE To compare the existence of gonial cortical bone thickness, antegonial index, mandibular canal bone resorption and gonial angle values and pathologies like ground-glass appearance in jawbones and brown tumor in male patients undergoing dialysis due to chronic renal failure and men from the healthy control group on panoramic radiographs. MATERIALS AND METHODS Panoramic radiographs were taken from 80 male individuals in total (40 normal and 40 dialysis patients). Values obtained from the right and left sides of the mandible were summed and their means were calculated. Gonial cortical thickness, antegonial index and gonial angle values were assessed with the Student's t-test, mandibular canal wall resorption with the Chi-square test, and pathologies such as ground-glass appearance and Brown tumor as "available" or "not available." RESULTS Statistically significant differences were observed among the antegonial index (P < 0.001), gonial cortical bone thickness (P < 0.001), and gonial angle (P < 0.001) values of study and control groups. Besides, mandibular canal wall resorption (P < 0.001) was also statistically significant. In the study group, pathologies with ground-glass appearance were encountered in mandible, but no radiographic findings were observed similar to brown tumor. CONCLUSIONS Compared to the control group, decreases were found in gonial cortical bone thicknesses, antegonial index values, mandibular canal wall resorption, and gonial angle values of the patients receiving dialysis treatment due to chronic renal failure. Although it is not statistically significant, pathology with ground-glass appearance was detected in a patient, but no pathologies like brown tumor were observed. These findings from patients with chronic renal failure must be evaluated in panoramic radiography.
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Affiliation(s)
- Saadettin Dagistan
- Department of Maxillofacial Radiology, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye
| | - Ozkan Miloglu
- Department of Maxillofacial Radiology, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye
| | - Fatma Caglayan
- Department of Maxillofacial Radiology, Faculty of Dentistry, Ataturk University, Erzurum, Turkiye
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DE Ponte FS, Catalfamo L, Micali G, Runci M, Cutroneo G, Vermiglio G, Centofanti A, Rizzo G. Effect of bisphosphonates on the mandibular bone and gingival epithelium of rats without tooth extraction. Exp Ther Med 2016; 11:1678-1684. [PMID: 27168789 PMCID: PMC4840833 DOI: 10.3892/etm.2016.3168] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 11/30/2015] [Indexed: 11/13/2022] Open
Abstract
Osteonecrosis of the jaw (ONJ) is an adverse effect of bisphosphonate treatment that has become the subject of increasing investigations, in particular due to its poorly understood pathogenesis. Several experimental studies on animal models have been conducted; however, the majority of these replicate human ONJ following tooth extraction, and describe alterations in the bone and gingival epithelium when necrosis is manifested. The aim of the present study was to analyze the rat mandibular bone and gingival epithelium during 45 days of zoledronate treatment (which is a bisphosphonate agent), without tooth extraction. Intraperitoneal injections of zoledronate acid (0.1 mg/kg) were performed three times a week in normal male Wistar rats (n=20), while a control group of rats (n=20) was treated with saline solution for 45 days. After 7, 15, 30 and 45 days of drug treatment, all rats were sacrificed and hematoxilin and eosin staining, immunofluorescence and scanning electron microscopy analyses were performed. The results of the analyses after 7 and 15 days of treatment were similar in the treatment and control group. After 30 and 45 days of treatment, structural alterations were observed in the bone. No structural alterations to the gingival epithelium were observed. Based on these results, it was hypothesized that low doses of zoledronate act directly on the bone tissues to induce morphological alterations from bone to necrotic tissue following surgical procedures, although no cytotoxic effects were detected in the gingival epithelium.
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Affiliation(s)
- Francesco Saverio DE Ponte
- Unit of Maxillo-Facial Surgery, Department of Odonostomatology, University of Messina, I-98125 Messina, Italy
| | - Luciano Catalfamo
- Unit of Maxillo-Facial Surgery, Department of Odonostomatology, University of Messina, I-98125 Messina, Italy
| | - Gregorio Micali
- Unit of Maxillo-Facial Surgery, Department of Odonostomatology, University of Messina, I-98125 Messina, Italy
| | - Michele Runci
- Unit of Maxillo-Facial Surgery, Department of Odonostomatology, University of Messina, I-98125 Messina, Italy
| | - Giuseppina Cutroneo
- Department of Biomedical Sciences and Morpho-Functional Images, University of Messina, I-98125 Messina, Italy
| | - Giovanna Vermiglio
- Department of Biomedical Sciences and Morpho-Functional Images, University of Messina, I-98125 Messina, Italy
| | - Antonio Centofanti
- Department of Biomedical Sciences and Morpho-Functional Images, University of Messina, I-98125 Messina, Italy
| | - Giuseppina Rizzo
- Department of Biomedical Sciences and Morpho-Functional Images, University of Messina, I-98125 Messina, Italy
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Linderup BW, Cattaneo PM, Jensen J, Küseler A. Mandibular Symphyseal Bone Graft for Reconstruction of Alveolar Cleft Defects: Volumetric Assessment With Cone Beam Computed Tomography 1-Year Postsurgery. Cleft Palate Craniofac J 2014; 53:64-72. [PMID: 25489772 DOI: 10.1597/14-143] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE The aims of this retrospective study were to evaluate the volumetric outcome of mandibular symphyseal bone graft in patients with unilateral cleft lip and palate by estimating the bone fill 1-year postoperatively on cone beam computed tomography. The outcome was assessed in relation to the (1) root development stage of the cleft side canine, (2) presence/absence of a cleft side lateral incisor, and (3) volume size of the preoperative cleft defect. METHODS The alveolar bone defect volume of 32 consecutive unilateral cleft lip and palate patients aged 8 years 1 month to 11 years 11 months was evaluated using a recently defined and standardized protocol. The outcome was calculated as the percentage of bone fill using the formula (VOLpre - VOLpost) / VOLpre) × 100. RESULTS The preoperative mean alveolar cleft volume was 934 mm(3), and the average percentage bone fill was 87%. There was no significant difference between bone fill and root developmental stage of the cleft-side canine (P = .882) nor presence/absence of the cleft side lateral incisor (P = .803). The size of the cleft defect did not correlate with the bone fill (r = .03, P = .84). CONCLUSIONS Secondary alveolar bone grafting with mandibular symphyseal bone graft in patients with unilateral cleft lip and palate is an attractive procedure assessed from the volumetric outcome using cone beam computed tomography. The 1-year average bone fill of 87% was not significantly influenced by root development stage of the cleft-side canine, presence or the absence of a cleft side lateral incisor, or size of the alveolar defect.
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