scholarly journals Role of Periapical Diseases in Medication-Related Osteonecrosis of the Jaws

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Nian Jing Rao ◽  
Jing Yi Wang ◽  
Ru Qing Yu ◽  
Yiu Yan Leung ◽  
Li Wu Zheng
Keyword(s):  
Alveolar Bone ◽  
Micro Computed Tomography ◽  
Mice Model ◽  
Periapical Lesions ◽  
Osteonecrosis Of The Jaws ◽  
Bone Absorption ◽  
Periapical Diseases ◽  
Periapical Periodontitis ◽  
Lower Molar

Objective. The present study aimed to investigate the role of periapical diseases in inducing medication-related osteonecrosis of the jaws (MRONJ) using an ovariectomized (OVX) mice model. Materials and Methods. Twenty C57BL/6N female mice were randomly assigned to two groups. All mice were subjected to bilateral ovariectomy and then treated with oncologic dose of zoledronic acid (ZA) or vehicle for twelve weeks. Eight weeks after commence of drug administration, a pulpal exposure (PE) operation was performed on the first right lower molar to induce periapical periodontitis; the contralateral non-PE tooth was used as control. All animals were sacrificed four weeks after pulpal exposure, and the mandibles were harvested for radiological and histomorphometrical analysis. Results. Micro computed tomography (μ-CT) examination demonstrated that periapical diseases significantly increased alveolar bone resorption, and the resorption was greatly attenuated by ZA treatment. Concurrent ZA therapy significantly increased bone density and histological osteocyte necrosis in the presence of periapical lesions. Conclusion. ZA treatment reduced bone absorption resulting from periapical disease but increased the risk of developing MRONJ in the ovariectomized mouse model.

Correlation Between Histomorphometric and Micro-computed Tomography Analysis of Periapical Lesions in Mice Model

2015 ◽  
Vol 39 (3) ◽  
pp. 187-191 ◽  
Author(s):  
Katharina Morant Holanda de Oliveira ◽  
Raquel Assed Bezerra da Silva ◽  
Erika Calvano Küchler ◽  
Alexandra Mussolino de Queiroz ◽  
Paulo Nelson Filho ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Micro Computed Tomography ◽  
Mice Model ◽  
Periapical Lesions ◽  
Tomography Analysis

scholarly journals Effect of Periapical Diseases in Development of MRONJ in Immunocompromised Mouse Model

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Nian Jing Rao ◽  
Ru Qing Yu ◽  
Jing Yi Wang ◽  
Alexandra Helm ◽  
Li Wu Zheng
Keyword(s):  
Bone Mineral Density ◽  
Zoledronic Acid ◽  
Bone Resorption ◽  
Alveolar Bone ◽  
Mice Model ◽  
Mineral Density ◽  
Concurrent Use ◽  
Immunocompromised Mouse ◽  
Periapical Diseases ◽  
Immunocompromised Mice

Objectives. This study aimed to assess the effect of zoledronic acid on an immunocompromised mice model with periapical disease. Materials and Methods. Thirty C57BL/6N mice were randomly divided into three groups (N = 10). All animals were subjected to bilateral ovariectomy (OVX) and then treated with saline (Veh), zoledronic acid (ZA), or concomitant zoledronic acid and dexamethasone (ZA/Dx) for 12 weeks. Eight weeks after starting drug administration, pulpal exposure was conducted on the lower left first molar. Four weeks after pulpal exposure, all mice were sacrificed and the mandibles were collected for radiological and histological examinations. Results. Microcomputed tomography (μ-CT) examination showed significantly reduced periapical bone resorption in the ZA/Dx group and decreased periodontal bone resorption in both ZA and ZA/Dx groups. Higher bone mineral density (BMD) and strengthened microstructure were found in ZA and ZA/Dx groups. More empty lacunae were found in ZA and ZA/Dx groups. Conclusions. Apical periodontitis aggravates MRONJ under immunocompromised circumstances. Concurrent use of ZA and steroids inhibits alveolar bone resorption but increases the risk of developing MRONJ.

scholarly journals Effects of Zoledronic Acid in Experimental Periapical Lesions in Rats: An Imaging and Histological Analysis

2017 ◽  
Vol 28 (5) ◽  
pp. 566-572
Author(s):  
Talita Ribeiro Tenório de França ◽  
Flávia Maria de Moraes Ramos-Perez ◽  
Andrea dos Anjos Pontual ◽  
Jurema Freire Lisboa de Castro ◽  
Paulo Rogério Ferreti Bonan ◽  
...  
Keyword(s):  
Zoledronic Acid ◽  
Histological Analysis ◽  
Saline Solution ◽  
Alveolar Bone ◽  
Intraperitoneal Administration ◽  
Cone Beam ◽  
Periapical Lesion ◽  
Periapical Lesions ◽  
Osteonecrosis Of The Jaws ◽  
Male Wistar Rats

Abstract The aim of this study was to assess the imaging and histological features of experimental periapical lesions, including the adjacent alveolar bone, in rats under zoledronic acid treatment. The study used 40 male Wistar rats distributed into 8 groups of 5 animals each: G1: induction of periapical lesion (PL) and weekly intraperitoneal administration (WIPA) of saline solution (0.9% NaCl) for 4 weeks; G2: PL induction and WIPA of zoledronic acid (0.15 mg/kg/week) for 4 weeks; G3: PL induction and WIPA of saline solution for 8 weeks; G4: PL induction and WIPA of zoledronic acid for 8 weeks; G5:WIPA of saline solution for 4 weeks and subsequent PL induction; G6: WIPA of zoledronic acid for 4 weeks and subsequent PL induction; G7: WIPA of saline solution for 8 weeks and subsequent PL induction; G8: WIPA of zoledronic acid for 8 weeks and subsequent PL induction. The administration of zoledronic acid or saline solution continued after PL induction until the euthanasia. Thus, cone beam computed tomography and histological analysis were performed. Statistical analyzes were performed by ANOVA and Kruskal-Wallis test. Groups treated with zoledronic acid showed significantly smaller size of PL than the groups treated with 0.9% NaCl (p<0.05). PLs were formed by chronic inflammation ranging from mild to moderate, with no difference between groups. In all specimens, no mandibular necrosis was observed. In conclusion, the presence of PLs apparently does not represent an important risk factor for the development of bisphosphonate-related osteonecrosis of the jaws.

scholarly journals The role of inhibition of osteocyte apoptosis in mediating orthodontic tooth movement and periodontal remodeling: a pilot study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Michele Kaplan ◽  
Zana Kalajzic ◽  
Thomas Choi ◽  
Imad Maleeh ◽  
Christopher L. Ricupero ◽  
...  
Keyword(s):  
Bone Density ◽  
Alveolar Bone ◽  
Tooth Movement ◽  
Orthodontic Tooth Movement ◽  
Tartrate Resistant Acid Phosphatase ◽  
Osteocyte Apoptosis ◽  
Saline Administration ◽  
Group 2 ◽  
Group 1

Abstract Background Orthodontic tooth movement (OTM) has been shown to induce osteocyte apoptosis in alveolar bone shortly after force application. However, how osteocyte apoptosis affects orthodontic tooth movement is unknown. The goal of this study was to assess the effect of inhibition of osteocyte apoptosis on osteoclastogenesis, changes in the alveolar bone density, and the magnitude of OTM using a bisphosphonate analog (IG9402), a drug that affects osteocyte and osteoblast apoptosis but does not affect osteoclasts. Material and methods Two sets of experiments were performed. Experiment 1 was used to specifically evaluate the effect of IG9402 on osteocyte apoptosis in the alveolar bone during 24 h of OTM. For this experiment, twelve mice were divided into two groups: group 1, saline administration + OTM24-h (n=6), and group 2, IG9402 administration + OTM24-h (n=6). The contralateral unloaded sides served as the control. The goal of experiment 2 was to evaluate the role of osteocyte apoptosis on OTM magnitude and osteoclastogenesis 10 days after OTM. Twenty mice were divided into 4 groups: group 1, saline administration without OTM (n=5); group 2, IG9402 administration without OTM (n=5); group 3, saline + OTM10-day (n=6); and group 4, IG9402 + OTM10-day (n=4). For both experiments, tooth movement was achieved using Ultra Light (25g) Sentalloy Closed Coil Springs attached between the first maxillary molar and the central incisor. Linear measurements of tooth movement and alveolar bone density (BVF) were assessed by MicroCT analysis. Cell death (or apoptosis) was assessed by terminal dUTP nick-end labeling (TUNEL) assay, while osteoclast and macrophage formation were assessed by tartrate-resistant acid phosphatase (TRAP) staining and F4/80+ immunostaining. Results We found that IG9402 significantly blocked osteocyte apoptosis in alveolar bone (AB) at 24 h of OTM. At 10 days, IG9402 prevented OTM-induced loss of alveolar bone density and changed the morphology and quality of osteoclasts and macrophages, but did not significantly affect the amount of tooth movement. Conclusion Our study demonstrates that osteocyte apoptosis may play a significant role in osteoclast and macrophage formation during OTM, but does not seem to play a role in the magnitude of orthodontic tooth movement.

scholarly journals Halofuginone functions as a therapeutic drug for chronic periodontitis in a mouse model

2020 ◽  
Vol 34 ◽  
pp. 205873842097489
Author(s):  
Jiang Wang ◽  
Bo Wang ◽  
Xin Lv ◽  
Yingjie Wang
Keyword(s):  
Alveolar Bone ◽  
Immune Cell ◽  
Critical Role ◽  
Therapeutic Drug ◽  
Mice Model ◽  
T Helper 17 ◽  
Th17 Cell Differentiation ◽  
Tnf Α

Periodontitis is an inflammatory disease caused by host immune response, resulting in a loss of periodontium and alveolar bone. Immune cells, such as T cells and macrophages, play a critical role in the periodontitis onset. Halofuginone, a natural quinazolinone alkaloid, has been shown to possess anti-fibrosis, anti-cancer, and immunomodulatory properties. However, the effect of halofuginone on periodontitis has never been reported. In this study, a ligature-induced mice model of periodontitis was applied to investigate the potential beneficial effect of halofuginone on periodontitis. We demonstrated that the administration of halofuginone significantly reduced the expression levels of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) in vivo, and markedly suppressed immune cell infiltration into the infected sites. Furthermore, we also observed that halofuginone treatment blocked the T-helper 17 (Th17) cell differentiation in vivo and in vitro. We demonstrated for the first time that halofuginone alleviated the onset of periodontitis through reducing immune responses.

scholarly journals Delivery Systems and Role of Growth Factors for Alveolar Bone Regeneration in Dentistry

10.5772/55580 ◽  
2013 ◽  
Author(s):  
Stefano Sivolella ◽  
Marleen De ◽  
Giulia Brunello ◽  
Sara Ricci ◽  
Drazen Tadic ◽  
...  
Keyword(s):  
Growth Factors ◽  
Bone Regeneration ◽  
Alveolar Bone ◽  
Delivery Systems
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