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Uchinuma M, Taketani Y, Kanaya R, Yamane Y, Shiota K, Suzuki R, Ishii M, Inomata M, Hayashi J, Shin K. Role of Piezo1 in modulating the RANKL/OPG ratio in mouse osteoblast cells exposed to Porphyromonas gingivalis lipopolysaccharide and mechanical stress. J Periodontal Res 2024; 59:749-757. [PMID: 38623787 DOI: 10.1111/jre.13265] [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: 06/20/2023] [Revised: 03/19/2024] [Accepted: 03/24/2024] [Indexed: 04/17/2024]
Abstract
AIMS Excessive occlusal force with periodontitis leads to rapid alveolar bone resorption. However, the molecular mechanism by which inflammation and mechanical stress cause bone resorption remains unclear. We examined the role of Piezo1, a mechanosensitive ion channel expressed on osteoblasts, in the changes in the receptor activator of nuclear factor-kappa B ligand (RANKL)/osteoprotegerin (OPG) ratio in mouse MC3T3-E1 osteoblast-like cells under Porphyromonas gingivalis lipopolysaccharide (P.g.-LPS) and mechanical stress. METHODS To investigate the effect of P.g.-LPS and mechanical stress on the RANKL/OPG ratio and Piezo1 expression, we stimulated MC3T3-E1 cells with P.g.-LPS. After 3 days in culture, shear stress, a form of mechanical stress, was applied to the cells using an orbital shaker. Subsequently, to investigate the role of Piezo1 in the change of RANKL/OPG ratio, we inhibited Piezo1 function by knockdown via Piezo1 siRNA transfection or by adding GsMTx4, a Piezo1 antagonist. RESULTS The RANKL/OPG ratio significantly increased in MC3T3-E1 cells cultured in a medium containing P.g.-LPS and undergoing mechanical stress compared to cells treated with P.g.-LPS or mechanical stress alone. However, the expression of Piezo1 was not increased by P.g.-LPS and mechanical stress. In addition, phosphorylation of MEK/ERK was induced in the cells under P.g.-LPS and mechanical stress. MC3T3-E1 cells treated with P.g.-LPS and mechanical stress when cocultured with RAW264.7 cells induced their differentiation into osteoclast-like cells. The increased RANKL/OPG ratio was suppressed by either Piezo1 knockdown or the addition of GsMTx4. Furthermore, GsMTx4 inhibited the phosphorylation of MEK/ERK. CONCLUSION These findings suggest that P.g.-LPS and Piezo1-mediated mechanical stress induce MEK/ERK phosphorylation and increase RANKL expression in osteoblasts. Consequently, this leads to the differentiation of osteoclast precursor cells into osteoclasts.
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Affiliation(s)
- Mabuki Uchinuma
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Yoshimasa Taketani
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Risako Kanaya
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Yusuke Yamane
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Koichiro Shiota
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Reiji Suzuki
- Division of Oral Rehabilitation, Department of Restorative & Biomaterials Sciences, Meikai University School of Dentistry, Sakado, Japan
| | - Makiko Ishii
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Megumi Inomata
- Division of Microbiology and Immunology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Joichiro Hayashi
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
| | - Kitetsu Shin
- Division of Periodontology, Department of Oral Biology and Tissue Engineering, Meikai University School of Dentistry, Sakado, Japan
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Wang M, Wang J, Jin X, Liu D, Bian H, Zhao Y, Li Y. Impact of occlusal contact pattern on dental stability and oromandibular system after orthodontic tooth movement in rats. Sci Rep 2023; 13:22276. [PMID: 38097596 PMCID: PMC10721791 DOI: 10.1038/s41598-023-46668-x] [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: 05/09/2023] [Accepted: 11/03/2023] [Indexed: 12/17/2023] Open
Abstract
How to ensure dental stability in new positions and reduce the likelihood of relapse is a major clinical concern in the orthodontic field. Occlusal contacts between arches may affect the transmission of masticatory forces, thereby influencing the biological response of the periodontal and the oromandibular system. Occlusion factors that may influence the stability after orthodontic tooth movement (OTM) remain largely unknown. Hence, this research was conducted in order to investigate the influence of different occlusal contact patterns on tooth stability and oromandibular system including the masseter muscle and the temporomandibular joint following OTM. By modifying the occlusal surfaces, in vivo animal study models with distinct occlusal patterns corresponding to clinical circumstances were established. The relapse distance of teeth and the level of inflammatory factors in the gingival cervical fluid were analyzed. We also closely observed the histological remodeling of periodontal tissue, masseter tissue, and joint tissue after one week of relapse. Moreover, genes expression in the alveolar bone was analyzed to illustrate the potential biological mechanisms of relapse under the influence of different occlusal contact patterns following OTM. Different occlusal contact patterns after OTM in rats were established. The intercuspation contact between cusp and fossa group exhibited the lowest level of relapse movement, inflammatory factors and osteoclast activity (P < 0.05). On the other hand, groups with interferences or inadequate contacts exhibited more relapse movement, and tend to promote inflammation of periodontal tissue and activate bone resorption (P < 0.05). Adequate occlusal contacts without interference may enhance tooth stability and reduce the likelihood of relapse. After active orthodontic treatment, necessary occlusal adjustment should be made to achieve the desired intercuspation contact relationship and ensure adequate contact between the arches. The elimination of occlusal interferences is crucial to achieving optimal stability and promoting overall healthy condition of the oromandibular system.
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Affiliation(s)
- Menglin Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
- Department of Stomatology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100043, China
| | - Jing Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Xiang Jin
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Dedi Liu
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China
| | - Huan Bian
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
| | - Yantao Zhao
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
- Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China.
- Beijing Engineering Research Center of Orthopedics Implants, Beijing, 100048, China.
- State Key Laboratory of Military Stomatology, Xi'an, 710032, China.
| | - Yanfeng Li
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, No. 51 Fucheng Road, Haidian District, Beijing, 100048, China.
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Djuran B, Tatic Z, Perunovic N, Pejcic N, Vukovic J, Petkovic-Curcin A, Vojvodic D, Rakic M. Underdiagnosis in Background of Emerging Public Health Challenges Related to Peri-Implant Diseases: An Interventional Split-Mouth Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:ijerph20010477. [PMID: 36612810 PMCID: PMC9819861 DOI: 10.3390/ijerph20010477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 06/02/2023]
Abstract
Peri-implant diseases are an emerging public health problem, and it's considered that limitations of standard diagnostics play the role herein. The study objective was the estimation of pathological bone resorption at clinical and biological level in patients with peri-implant mucositis (PIM) and peri-implantitis (PI) before and 6 months after standard treatment and to compare them with healthy controls (HC). The split-mouth interventional study included 60 patients affected with PIM or PI. Patients that also presented at least one more HC were enrolled in the study and underwent standard non-surgical and surgical treatment, respectively. Standard clinical parameters and soluble levels of RANKL were measured in peri-implant crevicular fluid baseline and 6 months following treatment. Clinical parameters and RANKL significantly decreased following treatment in PIM and PI. However, bleeding on probing and probing depth remained significantly increased when compared to HC. RANKL answered requests for biomarker of peri-implant diseases, its baseline levels were significantly increased in PIM and PI, they decreased following treatment and reached HC in peri-implantitis, while in PIM RANKL remained significantly increased. Presence of pathological bone resorption in patients lacked its clinical signs, and respective persistence following treatment suggest the need for biomarker-supported diagnosis for timely diagnosis of peri-implantitis and appropriate orientation of respective management strategies.
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Affiliation(s)
- Boris Djuran
- Department of Oral Implantology, Military Medical Academy, 11000 Belgrade, Serbia
| | - Zoran Tatic
- Department of Oral Implantology, Military Medical Academy, 11000 Belgrade, Serbia
| | - Neda Perunovic
- Faculty of Dental Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Natasa Pejcic
- Faculty of Dental Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Jovana Vukovic
- Biocell Hospital, 11070 Beograd, Serbia
- Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
| | | | - Danilo Vojvodic
- Institute for Medical Research, Military Medical Academy, 11000 Belgrade, Serbia
| | - Mia Rakic
- ETEP (Etiology and Therapy of Periodontal Diseases) Research Group, University Complutense of Madrid, 28040 Madrid, Spain
- Institute for Biological Research “Sinisa Stankovic”, University of Belgrade, 11000 Belgrade, Serbia
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Omi M, Mishina Y. Roles of osteoclasts in alveolar bone remodeling. Genesis 2022; 60:e23490. [PMID: 35757898 PMCID: PMC9786271 DOI: 10.1002/dvg.23490] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 05/25/2022] [Accepted: 06/09/2022] [Indexed: 12/30/2022]
Abstract
Osteoclasts are large multinucleated cells from hematopoietic origin and are responsible for bone resorption. A balance between osteoclastic bone resorption and osteoblastic bone formation is critical to maintain bone homeostasis. The alveolar bone, also called the alveolar process, is the part of the jawbone that holds the teeth and supports oral functions. It differs from other skeletal bones in several aspects: its embryonic cellular origin, the form of ossification, and the presence of teeth and periodontal tissues; hence, understanding the unique characteristic of the alveolar bone remodeling is important to maintain oral homeostasis. Excessive osteoclastic bone resorption is one of the prominent features of bone diseases in the jaw such as periodontitis. Therefore, inhibiting osteoclast formation and bone resorptive process has been the target of therapeutic intervention. Understanding the mechanisms of osteoclastic bone resorption is critical for the effective treatment of bone diseases in the jaw. In this review, we discuss basic principles of alveolar bone remodeling with a specific focus on the osteoclastic bone resorptive process and its unique functions in the alveolar bone. Lastly, we provide perspectives on osteoclast-targeted therapies and regenerative approaches associated with bone diseases in the jaw.
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Affiliation(s)
- Maiko Omi
- Department of Biologic and Materials Sciences & ProsthodonticsUniversity of Michigan School of DentistryAnn ArborMichiganUSA
| | - Yuji Mishina
- Department of Biologic and Materials Sciences & ProsthodonticsUniversity of Michigan School of DentistryAnn ArborMichiganUSA
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Ideno H, Komatsu K, Nakashima K, Nifuji A. Tooth transplantation and replantation: Biological insights towards therapeutic improvements. Genesis 2022; 60:e23496. [PMID: 35916605 DOI: 10.1002/dvg.23496] [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: 04/10/2022] [Revised: 06/10/2022] [Accepted: 06/18/2022] [Indexed: 11/06/2022]
Abstract
Transplantation and replantation of teeth are effective therapeutic approaches for tooth repositioning and avulsion, respectively. Transplantation involves transplanting an extracted tooth from the original site into another site, regenerating tissue including the periodontal ligament (PDL) and alveolar bone, around the transplanted tooth. Replantation places the avulsed tooth back to its original site, regenerating functional periodontal tissue. In clinical settings, transplantation and replantation result in favorable outcomes with regenerated PDL tissue in many cases. However, they often result in poor outcomes with two major complications: tooth ankylosis and root resorption. In tooth ankylosis, the root surface and alveolar bone are fused, reducing the PDL tissue between them. The root is subjected to remodeling processes and is partially replaced by bone. In severe cases, the resorbed root is completely replaced by bone tissue, which is called as "replacement resorption." Resorption is sometimes accompanied by infection-mediated inflammation. The molecular mechanisms of ankylosis and root resorption remain unclear, although some signaling mechanisms have been proposed. In this mini-review, we summarized the biological basis of repair mechanisms of tissues in transplantation and replantation and the pathogenesis of their healing failure. We also discussed possible therapeutic interventions to improve treatment success rates.
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Affiliation(s)
- Hisashi Ideno
- Department of Pharmacology, School of Dental Medicine Tsurumi University, Yokohama, Japan
| | - Koichiro Komatsu
- Department of Pharmacology, School of Dental Medicine Tsurumi University, Yokohama, Japan
| | - Kazuhisa Nakashima
- Department of Pharmacology, School of Dental Medicine Tsurumi University, Yokohama, Japan
| | - Akira Nifuji
- Department of Pharmacology, School of Dental Medicine Tsurumi University, Yokohama, Japan
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Hisamoto M, Kimura S, Iwata K, Iwanaga T, Yokoyama A. Inhibition of RANKL and Sema4D improves residual ridge resorption in mice. Sci Rep 2022; 12:4094. [PMID: 35260755 PMCID: PMC8904447 DOI: 10.1038/s41598-022-08016-3] [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: 12/28/2021] [Accepted: 02/28/2022] [Indexed: 11/27/2022] Open
Abstract
Residual ridge resorption (RRR) is a chronic and progressive bone resorption following tooth loss. It causes deterioration of the oral environments and leads to the pathogenesis of various systemic diseases. However, the molecular mechanisms and risk factors for RRR progression are still unclear and controversial. In this study, we developed a tooth extraction model using mice for analyzing long-term morphological and gene expression changes in the alveolar bone. We further applied ovariectomy to this model to elucidate the effects of osteoporosis on RRR progression. As a result, the alveolar bone loss was biphasic and consisted of rapid loss in the early stages and subsequently slow and sustained bone loss over a long period. Histological analysis indicated that ovariectomy prolonged the activation of osteoclasts in the alveolar bone. Furthermore, the expressions of Tnfsf11 and Sema4d kept increasing for a long time in OVX mice. Administration of neutralization antibodies for receptor activator of NF-κB ligand (RANKL) effectively suppressed RRR. Similarly, inhibition of Semaphorin 4D (Sema4D) also improved alveolar bone loss. This study demonstrated that reduced ovarian function may be a risk factor for RRR and that RANKL and Sema4D suppression are potential treatments.
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Affiliation(s)
- Meri Hisamoto
- Department of Oral Functional Prosthodontics, Division of Oral Functional Science, Faculty of Dental Medicine, Hokkaido University, Sapporo, 060-8586, Japan.
| | - Shunsuke Kimura
- Laboratory of Histology and Cytology, Graduate School of Medicine, Hokkaido University, Sapporo, 060-8638, Japan. .,Division of Biochemistry, Faculty of Pharmacy, Keio University, Tokyo, 105-8512, Japan.
| | - Kai Iwata
- Department of Oral Functional Prosthodontics, Division of Oral Functional Science, Faculty of Dental Medicine, Hokkaido University, Sapporo, 060-8586, Japan
| | - Toshihiko Iwanaga
- Laboratory of Histology and Cytology, Graduate School of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Atsuro Yokoyama
- Department of Oral Functional Prosthodontics, Division of Oral Functional Science, Faculty of Dental Medicine, Hokkaido University, Sapporo, 060-8586, Japan
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7
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Jiang M, Shang Z, Zhang T, Yin X, Liang X, Sun H. Study on the role of pyroptosis in bone resorption induced by occlusal trauma with or without periodontitis. J Periodontal Res 2022; 57:448-460. [PMID: 35141913 DOI: 10.1111/jre.12974] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 11/28/2021] [Accepted: 01/18/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVE Occlusal trauma is considered to be a contributing factor to bone loss associated with inflammatory periodontal disease. We hypothesized that pyroptosis, a recently discovered inflammation-induced programmed cell death pathway, plays a role in occlusal trauma. MATERIALS AND METHODS The occlusal trauma model was established using a cemented 1-mm elevated computer-aided design and manufacturing (CAD/CAM) metal crown. The periodontitis model was established by periodontal wire ligation with lipopolysaccharide (LPS) injection. The rats were sacrificed at 1, 2, 3, and 4 weeks. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to analyze the expression of pyroptosis-, inflammation-, and osteoclast-related markers. Micro-computed tomography (micro-CT) was used to determine bone morphology parameters. Tissue morphology was evaluated using hematoxylin and eosin staining (H&E). Osteoclasts were identified using tartrate-resistant acid phosphatase (TRAP) staining. The expression and distribution of factors related to pyroptosis and inflammation were evaluated by immunohistochemistry (IHC). The colocalization of dead cells and cysteinyl aspartate-specific proteinase-1 (caspase-1)-positive cells was analyzed by immunofluorescence. RESULTS Quantitative real-time polymerase chain reaction and IHC results showed that occlusal trauma induced the expression of pyroptotic factors during the early stages, while occlusal trauma with periodontitis upregulated the expression of pyroptotic factors at the later stages. The results of qRT-PCR, TRAP staining, and micro-CT showed that occlusal trauma with periodontitis increased the production of proinflammatory cytokines, leading to severe bone loss. Glyburide, an NOD-like receptor pyrin domain containing protein 3 (NLRP3)inhibitor, reduced the expression of pyroptosis markers induced by occlusal trauma with periodontitis and reversed bone resorption. CONCLUSIONS Pyroptosis was involved in bone loss induced by occlusal trauma with or without periodontitis, while glyburide reversed inflammation and bone resorption.
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Affiliation(s)
- Mengyang Jiang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Stomatology, Songjiang Sijing Hospital, Shanghai, China
| | - Zhenzhen Shang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China.,Department of Stomatology, Songjiang Sijing Hospital, Shanghai, China
| | - Ting Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Xiaojie Yin
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
| | - Xing Liang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Huiqiang Sun
- Department of Prosthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
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8
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Xu W, Lu Q, Qu M, Fan R, Leng S, Wang L, Liu L, Yang F, Zhou X, Huang D, Zhang L. Wnt4 regulates bone metabolism through IKK-NF-κB and ROCK signaling under occlusal traumatic periodontitis. J Periodontal Res 2022; 57:461-469. [PMID: 35137408 DOI: 10.1111/jre.12975] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/18/2021] [Accepted: 01/21/2022] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND OBJECTIVE Occlusal trauma is one of the most important local contributing factors of periodontitis. It has been reported that Wnt4, a noncanonical Wnt ligand, can inhibit osteoclast formation and inflammation and promote bone formation in vivo. However, the prospects of Wnt4 application in occlusal trauma and periodontitis have not yet been described. This study aimed to investigate the function and the corresponding mechanism of Wnt4 to regulate bone metabolism in occlusal trauma and periodontitis. MATERIAL AND METHODS Osteogenic-induced MC3T3-E1 cells were treated with or without Porphyromonas gingivalis lipopolysaccharide (Pg. LPS) under cyclic uniaxial compressive stress. After treatment with mouse recombinant protein Wnt4 (rWnt4), the expression of osteogenic markers and activation of the IKK-NF-κB signaling pathway were evaluated in vitro. To investigate whether Wnt4 can promote osteogenesis via the ROCK signaling pathway, the expression of RhoA was evaluated in vitro. Finally, we evaluated the change in bone quantity and the activation of the IKK-NF-κB and ROCK signaling in mice with occlusal trauma and periodontitis to demonstrate the therapeutic efficacy of rWnt4 injection. RESULTS Stimulation of traumatic force and Pg. LPS stimulation suppressed the expression of osteoblast markers, but their expression was rescued after rWnt4 treatment in vitro. In addition, the inhibition of the ROCK signaling pathway induced by force loading was reversed when rWnt4 was applied in vitro. Micro-CT, H&E, and TRAP staining of the mandibles showed increased bone loss in the occlusal trauma-aggravated periodontitis group, whereas it was rescued after rWnt4 injection. The expression levels of IκBα and p65 were upregulated in occlusal trauma and periodontitis-bearing mice, whereas the expression levels of Runx2 and RhoA were downregulated. After rWnt4 injection, remarkably upregulation of Runx2 and RhoA expression was observed in occlusal trauma and periodontitis- bearing mice. CONCLUSION Wnt4 not only inhibits IKK-NF-κB signaling but also activates ROCK signaling to inhibit osteoclast formation and promote bone regeneration in occlusal trauma and periodontitis-bearing mice.
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Affiliation(s)
- Weizhe Xu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.,Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine,Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang, China
| | - Qian Lu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Moyuan Qu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine,Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, Zhejiang, China
| | - Rong Fan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Sha Leng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Liu Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Linyi Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Fan Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Dingming Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Lan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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9
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Usui M, Onizuka S, Sato T, Kokabu S, Ariyoshi W, Nakashima K. Mechanism of alveolar bone destruction in periodontitis - Periodontal bacteria and inflammation. JAPANESE DENTAL SCIENCE REVIEW 2021; 57:201-208. [PMID: 34703508 PMCID: PMC8524191 DOI: 10.1016/j.jdsr.2021.09.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/23/2021] [Accepted: 09/29/2021] [Indexed: 12/30/2022] Open
Abstract
Periodontal disease is an inflammatory disease caused by periodontopathogenic bacteria, which eventually leads to bone tissue (alveolar bone) destruction as inflammation persists. Periodontal tissues have an immune system against the invasion of these bacteria, however, due to the persistent infection by periodontopathogenic bacteria, the host innate and acquired immunity is impaired, and tissue destruction, including bone tissue destruction, occurs. Osteoclasts are essential for bone destruction. Osteoclast progenitor cells derived from hematopoietic stem cells differentiate into osteoclasts. In addition, bone loss occurs when bone resorption by osteoclasts exceeds bone formation by osteoblasts. In inflammatory bone disease, inflammatory cytokines act on osteoblasts and receptor activator of nuclear factor-κB ligand (RANKL)-producing cells, resulting in osteoclast differentiation and activation. In addition to this mechanism, pathogenic factors of periodontal bacteria and mechanical stress activate osteoclasts and destruct alveolar bone in periodontitis. In this review, we focused on the mechanism of osteoclast activation in periodontitis and provide an overview based on the latest findings.
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Affiliation(s)
- Michihiko Usui
- Division of Periodontology, Department of Oral Function, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka 803-8580, Japan
| | - Satoru Onizuka
- Division of Periodontology, Department of Oral Function, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka 803-8580, Japan
| | - Tsuyoshi Sato
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, 38 Moro-hongou, Moroyama-machi, Iruma-gun, Saitama 350-0495, Japan
| | - Shoichiro Kokabu
- Division of Molecular Signaling and Biochemistry, Department of Health Promotion, Kyushu Dental University, Kokurakita-ku, Kitakyushu, Fukuoka 803-8580, Japan
| | - Wataru Ariyoshi
- Division of Infection and Molecular Biology, Department of Health Improvement, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka 803-8580, Japan
| | - Keisuke Nakashima
- Division of Periodontology, Department of Oral Function, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka 803-8580, Japan
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10
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Karcı BL, Oncu E. Comparison of Osteoimmunological and Microbiological Parameters of Extra Short and Longer Implants Loaded in the Posterior Mandible: A Split Mouth Randomized Clinical Study. Acta Stomatol Croat 2021; 55:238-247. [PMID: 34658370 PMCID: PMC8514233 DOI: 10.15644/asc55/3/1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/15/2021] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVES This study aimed to evaluate the levels of TNF-α, PGE2, RANKL, RANK, OPG, the markers of periimplant bone loss in peri-implant crevicular fluid obtained around standard and extra short implants. Moreover, the levels of putative oral pathogens were investigated in the submucosal biofilm samples. MATERIAL AND METHODS The implants were divided into two groups according to their lengths: standard (≥8 mm) and extra short (4 mm). A total of 60 implants were researched in 30 patients. The probing depth (PD), clinical attachment level (CAL), presence of bleeding on probing (BOP), 3-year survival rate (CSR), and bone loss (BL) were measured. RESULTS No statistically significant difference was found in the values of PD, CAL, BOP, CSR, and BL between the groups (P> 0.05). Total amounts of PGE2, TNF-α, RANKL, RANK, OPG, and RANKL/OPG were not statistically significantly different between the groups (P> 0.05). The abundance of F. nucleatum, T. forsythia, P. intermedia, P. gingivalis, S. oralis and T. denticola was compared between the groups and the results were not statistically significant (P> 0.05). CONCLUSION The results of this study suggested that PGE2, TNF-α, RANKL, RANK, OPG, and RANKL/OPG in PICF, as well as microbiological parameters in submucosal biofilms, were similar between standard (≥8 mm) and extra short (4 mm) implants. Therefore, the implant length does not seem to influence the bone loss, levels of osteoimmunological and microbiological markers in the peri-implant tissues and survival rates.
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Affiliation(s)
- Bi Lge Karcı
- Bi̇lge Karcı, Alanya Alaaddin Keykubat University, Faculty of Dentistry, Department of Periodontology, Alanya, Antalya, Turkey
| | - Elif Oncu
- Elif Oncu, Necmettin Erbakan University, Faculty of Dentistry, Department of Periodontology, Konya, Turkey
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11
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Goto KT, Kajiya H, Tsutsumi T, Maeshiba M, Tsuzuki T, Ohgi K, Kawaguchi M, Ohno J, Okabe K. The Stromal Cell-derived Factor-1 Expression Protected in Periodontal Tissues Damage during Occlusal Traumatism. J HARD TISSUE BIOL 2021. [DOI: 10.2485/jhtb.30.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Kazuko T Goto
- Department of Dental Hygiene, Fukuoka College of Health Sciences, Fukuoka
| | - Hiroshi Kajiya
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College
- Research Center for Oral Medicine, Fukuoka Dental College
| | | | | | | | - Kimiko Ohgi
- Department of Odontology, Fukuoka Dental College
| | | | - Jun Ohno
- Research Center for Oral Medicine, Fukuoka Dental College
| | - Koji Okabe
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College
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12
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Bilgin Çetin M, Sezgin Y, Maraş E, Cebeci İA. Association of probable bruxism with periodontal status: A cross-sectional study in patients seeking periodontal care. J Periodontal Res 2020; 56:370-378. [PMID: 33368265 DOI: 10.1111/jre.12829] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 11/06/2020] [Accepted: 12/02/2020] [Indexed: 12/13/2022]
Abstract
OBJECTIVE The goals of this study were to investigate the prevalence of probable bruxism in a group of patients seeking a periodontal care and the association between probable bruxism and periodontal status. BACKGROUND The results of previous studies evaluating the relationship between bruxism and periodontitis are contradictory. In addition, the relationship between probable bruxism and periodontitis in adults has not been evaluated, yet. Therefore, new studies are required in this field to clarify the relationship between bruxism and periodontitis. METHODS Patients seeking periodontal care at a university periodontology unit were considered in this study. Their periodontal diagnosis, number of missing teeth, presence of probable bruxism, and sociodemographic characteristics were recorded. The periodontal status of each study participant was defined according to the latest consensus of the American Association of Periodontology/European Federation of Periodontology, and the 2018 consensus report on the assessment of bruxism was used to evaluate probable bruxism. A multiple logistic regression analysis was performed to determine the effects of bruxism on periodontitis. RESULTS A total of 541 patients (289 females and 252 males, mean age 42.1 ± 15.9 years) were enrolled in the present study. The prevalence of probable bruxism was 36.6%. Additionally, 40.9% of the study population was diagnosed with periodontitis. The probable bruxers were older (P < 0.001), had a higher number of missing teeth (P < 0.001), and had poor periodontal status (P < 0.001). The multivariate logistic regression analysis suggested that probable bruxism was associated with periodontitis, after adjusting relevant factors (odds ratio: 2.243, 95% CI: 1.465-3.434, P < 0.001). CONCLUSIONS It was observed that the prevalence of probable bruxism was 36.6% and probable bruxers showed higher odds of periodontitis. Future studies with prospective randomized design should be conducted to confirm these results among a larger study population.
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Affiliation(s)
- Mehtap Bilgin Çetin
- Faculty of Dentistry, Department of Periodontology, Baskent University, Ankara, Turkey
| | - Yasemin Sezgin
- Faculty of Dentistry, Department of Periodontology, Baskent University, Ankara, Turkey
| | - Enes Maraş
- Faculty of Dentistry, Department of Periodontology, Baskent University, Ankara, Turkey
| | - İlker Ata Cebeci
- Faculty of Dentistry, Department of Orthodontics, Baskent University, Ankara, Turkey
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13
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Kuraji R, Wu YH, Hashimoto S, Miyashita Y, Mishiro S, Ito H, Kamarajan P, Kapila Y, Numabe Y. Periodontal inflammation triggers a site-specific and wide radius of calcium metabolic effects on alveolar bone. J Periodontal Res 2020; 56:314-329. [PMID: 33314132 DOI: 10.1111/jre.12824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 09/30/2020] [Accepted: 10/28/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND OBJECTIVE There is a close relationship between inflammation and bone remodeling in the periodontium. However, previous studies have not delineated the alterations in calcium (Ca) metabolism during periodontitis progression. The aim of this current investigation was to examine Ca dynamics in alveolar bone of rats during progression of ligature-induced periodontal inflammation by using 45 Ca, which is an index of hard tissue neogenesis. MATERIAL AND METHODS To induce periodontitis, the maxillary right first molar (M1) of 8-week-old male rats was ligated with a silk suture for 1, 3, 7, and 28 days. The left M1 was not ligated as a control. To evaluate resultant changes in bone neogenesis, 45 CaCl2 was injected intraperitoneally 24 hours before euthanasia. The left-and-right palatal mucosa, molar teeth (M1 and M2), and alveolar bone were harvested for evaluation of 45 Ca radioactivity using a liquid scintillation counter. The distribution of 45 Ca in maxillary tissues was evaluated using autoradiography (ARG). In addition, we analyzed the bone volume fraction (BV/TV) and bone mineral density (BMD) of the alveolar bone by micro-computed tomography. To investigate the number of osteoclasts and osteoblasts, tartrate-resistant acid phosphatase (TRAP) and bone-specific alkaline phosphatase (BAP) were measured by an enzymatic assay and immunohistochemistry, respectively. RESULTS 45 Ca radioactivity in the alveolar bone of the ligature side decreased by 8% compared to the unligated control-side on day 1, whereas on day 7, it markedly increased by 33%. The 45 Ca levels in the gingival tissue and molar teeth were slightly but significantly lower than the control-side on day 1 and higher from day 3 to 28. The variation in 45 Ca levels for the alveolar bone was greater and specific compared with other tissues. Furthermore, on day 7, ARG data revealed that 45 Ca on the control side was primarily localized to the periodontal ligament (PDL) space and alveolar bone crest and barely detected in the gingival tissues and deeper parts of the alveolar bone. On the ligature side, 45 Ca disappeared from the PDL and alveolar crest, but instead was broadly and significantly increased within the deeper zones of the alveolar bone and furcation areas and distant from the site of ligature placement and periodontal inflammation. In the shallow zone of the alveolar bone, these changes in 45 Ca levels on day 7 were consistent with decreases in the bone structural parameters (BV/TV and BMD), enhanced osteoclast presence, and suppressed levels of BAP expression in osteoblasts. In contrast, the deep zone and furcation area showed that TRAP-positive cells increased, but BAP expression was maintained in the resorption lacunae of the alveolar bone. CONCLUSION During periodontitis progression in rats, 45 Ca levels in the alveolar bone exhibited biphasic alterations, namely decreases and increases. These data indicate that periodontitis induces a wide range of site-specific Ca metabolism alterations within the alveolar bone.
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Affiliation(s)
- Ryutaro Kuraji
- Department of Life Science Dentistry, The Nippon Dental University, Tokyo, Japan.,Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan.,Department of Orofacial Sciences, University of California San Francisco, School of Dentistry, San Francisco, CA, USA
| | - Ya-Hsin Wu
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan.,Department of Periodontology, China Medical University Hospital, Taichung City, Taiwan
| | | | - Yukihiro Miyashita
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan
| | - Saki Mishiro
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan
| | - Hiroshi Ito
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan
| | - Pachiyappan Kamarajan
- Department of Orofacial Sciences, University of California San Francisco, School of Dentistry, San Francisco, CA, USA
| | - Yvonne Kapila
- Department of Orofacial Sciences, University of California San Francisco, School of Dentistry, San Francisco, CA, USA
| | - Yukihiro Numabe
- Department of Periodontology, The Nippon Dental University School of Life Dentistry at Tokyo, Tokyo, Japan
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14
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Oyama M, Ukai T, Yamashita Y, Yoshimura A. High-mobility group box 1 released by traumatic occlusion accelerates bone resorption in the root furcation area in mice. J Periodontal Res 2020; 56:186-194. [PMID: 33247463 DOI: 10.1111/jre.12813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 09/20/2020] [Accepted: 09/30/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND OBJECTIVE Traumatic occlusion can cause bone resorption without bacterial infection. Although bone resorption in periodontitis has been relatively well studied, little is known about bone resorption by traumatic occlusion. High-mobility group box 1 (HMGB1) is released from damaged tissue and has been recently shown to promote bone resorption in a murine periodontitis model and may also promote bone resorption by traumatic occlusion. The present study aimed to examine whether HMGB1 accelerates bone resorption by traumatic occlusion in mice. MATERIALS AND METHODS Occlusal trauma was induced in the lower left first molar of mice by bonding a wire to the upper left first molar, and bone resorption and osteoclast formation were evaluated histochemically. The expression of HMGB1, Toll-like receptor 4 (TLR4; the receptor for HMGB1), and receptor activator of NFκB ligand (RANKL; an essential osteoclast differentiation factor) was evaluated immunohistologically. In addition, mice were administrated with an anti-HMGB1-neutralizing antibody to analyze the role of HMGB1. RESULTS Bone resorption and osteoclast formation gradually increased until day 5 at the furcation area after the application of traumatic occlusion. Expression of HMGB1 was observed at the furcation area on day 1, but was attenuated by day 3. Expression of RANKL gradually increased until day 3, but was attenuated by day 5. Administration of anti-HMGB1 antibody significantly reduced the number of osteoclasts and the expression of RANKL and TLR4 at the furcation area. CONCLUSION Release of HMGB1 in the root furcation area accelerated bone resorption by up-regulating RANKL and TLR4 expression in mice with traumatic occlusion.
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Affiliation(s)
- Mika Oyama
- Department of Periodontology and Endodontology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Takashi Ukai
- Oral Management Center, Nagasaki University Hospital, Nagasaki, Japan
| | - Yasunori Yamashita
- Department of Periodontology and Endodontology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Atsutoshi Yoshimura
- Department of Periodontology and Endodontology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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15
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Abdalla HB, Clemente-Napimoga JT, Trindade-da-Silva CA, Alves LJ, Prats RDS, Youssef A, Vieira Dos Santos PC, Buarque E Silva WA, Andrade E Silva F, Napimoga MH. Occlusion Heightened by Metal Crown Cementation is Aggressive for Periodontal Tissues. J Prosthodont 2020; 30:142-149. [PMID: 32783328 DOI: 10.1111/jopr.13235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2020] [Indexed: 12/29/2022] Open
Abstract
PURPOSE To investigate the effect of experimental traumatic occlusion (ETO) induced by metal crowns on alveolar bone loss. MATERIALS AND METHODS Metal crowns were custom-made for the lower first molars with occlusal discrepancy of 0.4 and 0.7 mm from the maximum intercuspation. Thirty-six animals were randomly divided into three groups (n = 12 animals per group): 0.4-mm hyperocclusion group, 0.7-mm hyperocclusion group and the sham group (no metal crown). Twenty-eight days after crown cementation, the animals were euthanized and gingival tissue was collected to assess cytokine levels of IL-17, IL-6, and TNF-α using enzyme-linked immunosorbent assay (ELISA). Mandibles were stained with 1% methylene blue and alveolar bone levels were quantified. Western blotting was used to quantify the expression of receptor activator of nuclear factor κ B (RANK), and its ligand (RANKL), secreted osteoclastogenic factor of activated T cells (SOFAT) and TNF-α-converting enzyme (TACE). Also, mandibles were histologically processed and stained with hematoxylin and eosin, from which the presence of osteoclast-like cells, multinucleated cells containing ≥3 nuclei was counted at 100× magnification. The data were analyzed using one-way ANOVA and Tukey tests. RESULTS Experimental occlusal trauma for 28 consecutive days significantly increased alveolar bone loss and multinucleated cell counts (p < 0.05). RANK, RANKL, SOFAT, TACE, IL-6, and TNF-α were significantly higher in gingival tissues of ETO groups (p < 0.05). IL-17 titers were unchanged among the groups (p > 0.05). CONCLUSION Experimental traumatic occlusion activates and sustains bone resorption pathways in the periodontium inducing alveolar bone resorption. As the intensity of occlusal trauma increased, alternative osteoclastic pathways were activated, such as TACE and SOFAT.
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Affiliation(s)
- Henrique Ballassini Abdalla
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Campinas, SP, Brazil
| | - Juliana Trindade Clemente-Napimoga
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Campinas, SP, Brazil
| | - Carlos Antônio Trindade-da-Silva
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Campinas, SP, Brazil
| | - Luciane Jorge Alves
- Faculdade São Leopoldo Mandic, Instituto São Leopoldo Mandic, Immunology, Campinas, SP, Brazil
| | - Roberta da Silva Prats
- Faculdade São Leopoldo Mandic, Instituto São Leopoldo Mandic, Immunology, Campinas, SP, Brazil
| | - Alexandre Youssef
- Faculdade São Leopoldo Mandic, Instituto São Leopoldo Mandic, Immunology, Campinas, SP, Brazil
| | - Paulo César Vieira Dos Santos
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, São Paulo, Brazil
| | - Wilkens Aurélio Buarque E Silva
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, São Paulo, Brazil
| | - Frederico Andrade E Silva
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, São Paulo, Brazil
| | - Marcelo Henrique Napimoga
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Campinas, SP, Brazil.,Faculdade São Leopoldo Mandic, Instituto São Leopoldo Mandic, Immunology, Campinas, SP, Brazil
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16
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Arita Y, Yoshinaga Y, Kaneko T, Kawahara Y, Nakamura K, Ohgi K, Arita S, Ryu T, Takase M, Sakagami R. Glyburide inhibits the bone resorption induced by traumatic occlusion in rats. J Periodontal Res 2020; 55:464-471. [PMID: 32153049 DOI: 10.1111/jre.12731] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/25/2019] [Accepted: 12/28/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To examine whether glyburide inhibits bone destruction caused by traumatic occlusion in a rat occlusal trauma model. BACKGROUND Excessive mechanical stress, such as traumatic occlusion, induces expression of IL-1β and may be involved in bone resorption. NLRP3 inflammasomes have been linked to IL-1β expression, but it is currently unclear whether glyburide, the inhibiter of NLRP3 inflammasome, suppresses occlusal trauma in rats. METHODS Male SD rats aged 7 weeks were used. In the trauma group, the occlusal surface of the maxillary first right molar was raised by attaching a metal wire to apply occlusal trauma to the mandibular first right molar. In the trauma + glyburide group, the NLRP3 inhibitor glyburide was administered orally every 24 hours from 1 day before induction of occlusal trauma. Rats were euthanized after 5 or 10 days, and the maxillary first molars were harvested with the adjacent tissues for histopathological investigation. Immunohistochemical expression of IL-1β, NLRP3, and RANKL was also assessed. RESULTS On day 5, bone resorption was significantly greater in the trauma group compared with the control group or the trauma + glyburide group, and there were significantly higher numbers of osteoclasts and cells positive for IL-1β, NLRP3, and RANKL in the trauma group. CONCLUSION In this study, glyburide inhibits bone resorption by traumatic occlusion in rats. It suggests that the NLRP3/IL-1β pathway might be associated with bone resorption induced by traumatic occlusion.
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Affiliation(s)
- Yoichi Arita
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Yasunori Yoshinaga
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan.,Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Takashi Kaneko
- Center for Oral Diseases, Fukuoka Dental College, Fukuoka, Japan
| | - Yuri Kawahara
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Keiko Nakamura
- Center for Oral Diseases, Fukuoka Dental College, Fukuoka, Japan
| | - Kimiko Ohgi
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Seiichi Arita
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Takanori Ryu
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Minoru Takase
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Ryuji Sakagami
- Section of Periodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
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17
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Jepsen S, Caton JG, Albandar JM, Bissada NF, Bouchard P, Cortellini P, Demirel K, de Sanctis M, Ercoli C, Fan J, Geurs NC, Hughes FJ, Jin L, Kantarci A, Lalla E, Madianos PN, Matthews D, McGuire MK, Mills MP, Preshaw PM, Reynolds MA, Sculean A, Susin C, West NX, Yamazaki K. Periodontal manifestations of systemic diseases and developmental and acquired conditions: Consensus report of workgroup 3 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions. J Periodontol 2019; 89 Suppl 1:S237-S248. [PMID: 29926943 DOI: 10.1002/jper.17-0733] [Citation(s) in RCA: 209] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/07/2018] [Accepted: 02/12/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND A variety of systemic diseases and conditions can affect the course of periodontitis or have a negative impact on the periodontal attachment apparatus. Gingival recessions are highly prevalent and often associated with hypersensitivity, the development of caries and non-carious cervical lesions on the exposed root surface and impaired esthetics. Occlusal forces can result in injury of teeth and periodontal attachment apparatus. Several developmental or acquired conditions associated with teeth or prostheses may predispose to diseases of the periodontium. The aim of this working group was to review and update the 1999 classification with regard to these diseases and conditions, and to develop case definitions and diagnostic considerations. METHODS Discussions were informed by four reviews on 1) periodontal manifestions of systemic diseases and conditions; 2) mucogingival conditions around natural teeth; 3) traumatic occlusal forces and occlusal trauma; and 4) dental prostheses and tooth related factors. This consensus report is based on the results of these reviews and on expert opinion of the participants. RESULTS Key findings included the following: 1) there are mainly rare systemic conditions (such as Papillon-Lefevre Syndrome, leucocyte adhesion deficiency, and others) with a major effect on the course of periodontitis and more common conditions (such as diabetes mellitus) with variable effects, as well as conditions affecting the periodontal apparatus independently of dental plaque biofilm-induced inflammation (such as neoplastic diseases); 2) diabetes-associated periodontitis should not be regarded as a distinct diagnosis, but diabetes should be recognized as an important modifying factor and included in a clinical diagnosis of periodontitis as a descriptor; 3) likewise, tobacco smoking - now considered a dependence to nicotine and a chronic relapsing medical disorder with major adverse effects on the periodontal supporting tissues - is an important modifier to be included in a clinical diagnosis of periodontitis as a descriptor; 4) the importance of the gingival phenotype, encompassing gingival thickness and width in the context of mucogingival conditions, is recognized and a novel classification for gingival recessions is introduced; 5) there is no evidence that traumatic occlusal forces lead to periodontal attachment loss, non-carious cervical lesions, or gingival recessions; 6) traumatic occlusal forces lead to adaptive mobility in teeth with normal support, whereas they lead to progressive mobility in teeth with reduced support, usually requiring splinting; 7) the term biologic width is replaced by supracrestal tissue attachment consisting of junctional epithelium and supracrestal connective tissue; 8) infringement of restorative margins within the supracrestal connective tissue attachment is associated with inflammation and/or loss of periodontal supporting tissue. However, it is not evident whether the negative effects on the periodontium are caused by dental plaque biofilm, trauma, toxicity of dental materials or a combination of these factors; 9) tooth anatomical factors are related to dental plaque biofilm-induced gingival inflammation and loss of periodontal supporting tissues. CONCLUSION An updated classification of the periodontal manifestations and conditions affecting the course of periodontitis and the periodontal attachment apparatus, as well as of developmental and acquired conditions, is introduced. Case definitions and diagnostic considerations are also presented.
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Affiliation(s)
- Søren Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Jack G Caton
- University of Rochester, Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Jasim M Albandar
- Department of Periodontology and Oral Implantology, Temple University School of Dentistry, Philadelphia, PA, USA
| | | | - Philippe Bouchard
- U.F.R. d'Odontologie, Université Paris Diderot, Hôpital Rothschild AP-HP, Paris, France
| | - Pierpaolo Cortellini
- Private practice, Firenze, Italy; European Research Group on Periodontology, Bern, Switzerland
| | - Korkud Demirel
- Department of Periodontology, Istanbul University, Istanbul, Turkey
| | - Massimo de Sanctis
- Department of Periodontology, Università Vita e Salute San Raffaele, Milan, Italy
| | - Carlo Ercoli
- University of Rochester, Prosthodontics & Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Jingyuan Fan
- University of Rochester, Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Nicolaas C Geurs
- Department of Periodontology, University of Alabama at Birmingham, School of Dentistry, Birmingham, AL, USA
| | | | - Lijian Jin
- Discipline of Periodontology, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, China
| | | | - Evanthia Lalla
- Columbia University College of Dental Medicine, Division of Periodontics, New York, NY, USA
| | - Phoebus N Madianos
- Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, Greece
| | - Debora Matthews
- Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia
| | | | - Michael P Mills
- Department of Periodontics, University of Texas Health Science Center at San Antonio, TX, USA
| | - Philip M Preshaw
- Centre for Oral Health Research and Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Mark A Reynolds
- University of Maryland, School of Dentistry, Department of Advanced Oral Sciences and Therapeutics, Baltimore, MD, USA
| | - Anton Sculean
- Department of Periodontology, University of Bern, Switzerland
| | - Cristiano Susin
- Department of Periodontics, Augusta University Dental College of Georgia, Augusta, GA, USA
| | - Nicola X West
- Restorative Dentistry and Periodontology, School of Oral and Dental Sciences, Bristol Dental School & Hospital, Bristol, UK
| | - Kazuhisa Yamazaki
- Research Unit for Oral-Systemic Connection, Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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18
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Jepsen S, Caton JG, Albandar JM, Bissada NF, Bouchard P, Cortellini P, Demirel K, de Sanctis M, Ercoli C, Fan J, Geurs NC, Hughes FJ, Jin L, Kantarci A, Lalla E, Madianos PN, Matthews D, McGuire MK, Mills MP, Preshaw PM, Reynolds MA, Sculean A, Susin C, West NX, Yamazaki K. Periodontal manifestations of systemic diseases and developmental and acquired conditions: Consensus report of workgroup 3 of the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases and Conditions. J Clin Periodontol 2019; 45 Suppl 20:S219-S229. [PMID: 29926500 DOI: 10.1111/jcpe.12951] [Citation(s) in RCA: 184] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 02/07/2018] [Accepted: 02/12/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND A variety of systemic diseases and conditions can affect the course of periodontitis or have a negative impact on the periodontal attachment apparatus. Gingival recessions are highly prevalent and often associated with hypersensitivity, the development of caries and non-carious cervical lesions on the exposed root surface and impaired esthetics. Occlusal forces can result in injury of teeth and periodontal attachment apparatus. Several developmental or acquired conditions associated with teeth or prostheses may predispose to diseases of the periodontium. The aim of this working group was to review and update the 1999 classification with regard to these diseases and conditions, and to develop case definitions and diagnostic considerations. METHODS Discussions were informed by four reviews on 1) periodontal manifestions of systemic diseases and conditions; 2) mucogingival conditions around natural teeth; 3) traumatic occlusal forces and occlusal trauma; and 4) dental prostheses and tooth related factors. This consensus report is based on the results of these reviews and on expert opinion of the participants. RESULTS Key findings included the following: 1) there are mainly rare systemic conditions (such as Papillon-Lefevre Syndrome, leucocyte adhesion deficiency, and others) with a major effect on the course of periodontitis and more common conditions (such as diabetes mellitus) with variable effects, as well as conditions affecting the periodontal apparatus independently of dental plaque biofilm-induced inflammation (such as neoplastic diseases); 2) diabetes-associated periodontitis should not be regarded as a distinct diagnosis, but diabetes should be recognized as an important modifying factor and included in a clinical diagnosis of periodontitis as a descriptor; 3) likewise, tobacco smoking - now considered a dependence to nicotine and a chronic relapsing medical disorder with major adverse effects on the periodontal supporting tissues - is an important modifier to be included in a clinical diagnosis of periodontitis as a descriptor; 4) the importance of the gingival phenotype, encompassing gingival thickness and width in the context of mucogingival conditions, is recognized and a novel classification for gingival recessions is introduced; 5) there is no evidence that traumatic occlusal forces lead to periodontal attachment loss, non-carious cervical lesions, or gingival recessions; 6) traumatic occlusal forces lead to adaptive mobility in teeth with normal support, whereas they lead to progressive mobility in teeth with reduced support, usually requiring splinting; 7) the term biologic width is replaced by supracrestal tissue attachment consisting of junctional epithelium and supracrestal connective tissue; 8) infringement of restorative margins within the supracrestal connective tissue attachment is associated with inflammation and/or loss of periodontal supporting tissue. However, it is not evident whether the negative effects on the periodontium are caused by dental plaque biofilm, trauma, toxicity of dental materials or a combination of these factors; 9) tooth anatomical factors are related to dental plaque biofilm-induced gingival inflammation and loss of periodontal supporting tissues. CONCLUSION An updated classification of the periodontal manifestations and conditions affecting the course of periodontitis and the periodontal attachment apparatus, as well as of developmental and acquired conditions, is introduced. Case definitions and diagnostic considerations are also presented.
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Affiliation(s)
- Søren Jepsen
- Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
| | - Jack G Caton
- University of Rochester, Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Jasim M Albandar
- Department of Periodontology and Oral Implantology, Temple University School of Dentistry, Philadelphia, PA, USA
| | | | - Philippe Bouchard
- U.F.R. d'Odontologie, Université Paris Diderot, Hôpital Rothschild AP-HP, Paris, France
| | - Pierpaolo Cortellini
- Private practice, Firenze, Italy; European Research Group on Periodontology, Bern, Switzerland
| | - Korkud Demirel
- Department of Periodontology, Istanbul University, Istanbul, Turkey
| | - Massimo de Sanctis
- Department of Periodontology, Università Vita e Salute San Raffaele, Milan, Italy
| | - Carlo Ercoli
- University of Rochester, Prosthodontics & Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Jingyuan Fan
- University of Rochester, Periodontics, Eastman Institute for Oral Health, Rochester, NY, USA
| | - Nicolaas C Geurs
- Department of Periodontology, University of Alabama at Birmingham, School of Dentistry, Birmingham, AL, USA
| | | | - Lijian Jin
- Discipline of Periodontology, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, China
| | | | - Evanthia Lalla
- Columbia University College of Dental Medicine, Division of Periodontics, New York, NY, USA
| | - Phoebus N Madianos
- Department of Periodontology, School of Dentistry, National and Kapodistrian University of Athens, Greece
| | - Debora Matthews
- Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia
| | | | - Michael P Mills
- Department of Periodontics, University of Texas Health Science Center at San Antonio, TX, USA
| | - Philip M Preshaw
- Centre for Oral Health Research and Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Mark A Reynolds
- University of Maryland, School of Dentistry, Department of Advanced Oral Sciences and Therapeutics, Baltimore, MD, USA
| | - Anton Sculean
- Department of Periodontology, University of Bern, Switzerland
| | - Cristiano Susin
- Department of Periodontics, Augusta University Dental College of Georgia, Augusta, GA, USA
| | - Nicola X West
- Restorative Dentistry and Periodontology, School of Oral and Dental Sciences, Bristol Dental School & Hospital, Bristol, UK
| | - Kazuhisa Yamazaki
- Research Unit for Oral-Systemic Connection, Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Metal Nanoparticles Released from Dental Implant Surfaces: Potential Contribution to Chronic Inflammation and Peri-Implant Bone Loss. MATERIALS 2019; 12:ma12122036. [PMID: 31242601 PMCID: PMC6630980 DOI: 10.3390/ma12122036] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 02/06/2023]
Abstract
Peri-implantitis is an inflammatory disease affecting tissues surrounding dental implants. Although it represents a common complication of dental implant treatments, the underlying mechanisms have not yet been fully described. The aim of this study is to identify the role of titanium nanoparticles released form the implants on the chronic inflammation and bone lysis in the surrounding tissue. We analyzed the in vitro effect of titanium (Ti) particle exposure on mesenchymal stem cells (MSCs) and fibroblasts (FU), evaluating cell proliferation by MTT test and the generation of reactive oxygen species (ROS). Subsequently, in vivo analysis of peri-implant Ti particle distribution, histological, and molecular analyses were performed. Ti particles led to a time-dependent decrease in cell viability and increase in ROS production in both MSCs and FU. Tissue analyses revealed presence of oxidative stress, high extracellular and intracellular Ti levels and imbalanced bone turnover. High expression of ZFP467 and the presence of adipose-like tissue suggested dysregulation of the MSC population; alterations in vessel morphology were identified. The results suggest that Ti particles may induce the production of high ROS levels, recruiting abnormal quantity of neutrophils able to produce high level of metalloproteinase. This induces the degradation of collagen fibers. These events may influence MSC commitment, with an imbalance of bone regeneration.
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20
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Affiliation(s)
- Euloir Passanezi
- Division of PeriodonticsSchool of Dentistry at BauruUniversity of São Paulo Bauru Brazil
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21
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Micro-computed tomography for evaluating alveolar bone resorption induced by hyperocclusion. J Prosthodont Res 2018; 62:298-302. [DOI: 10.1016/j.jpor.2017.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 11/14/2017] [Accepted: 11/23/2017] [Indexed: 11/18/2022]
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22
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Fan J, Caton JG. Occlusal trauma and excessive occlusal forces: Narrative review, case definitions, and diagnostic considerations. J Periodontol 2018; 89 Suppl 1:S214-S222. [DOI: 10.1002/jper.16-0581] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 09/13/2017] [Accepted: 09/24/2017] [Indexed: 12/23/2022]
Affiliation(s)
- Jingyuan Fan
- Department of Periodontics; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - Jack G. Caton
- Department of Periodontics; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
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23
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Fan J, Caton JG. Occlusal trauma and excessive occlusal forces: Narrative review, case definitions, and diagnostic considerations. J Clin Periodontol 2018; 45 Suppl 20:S199-S206. [DOI: 10.1111/jcpe.12949] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 09/13/2017] [Accepted: 09/24/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Jingyuan Fan
- Department of Periodontics; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
| | - Jack G. Caton
- Department of Periodontics; Eastman Institute for Oral Health; University of Rochester; Rochester NY USA
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24
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Extracellular HSP72 induces proinflammatory cytokines in human periodontal ligament fibroblast cells through the TLR4/NFκB pathway in vitro. Arch Oral Biol 2017; 83:181-186. [DOI: 10.1016/j.archoralbio.2017.07.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/19/2017] [Accepted: 07/27/2017] [Indexed: 12/22/2022]
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25
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Matsuda Y, Minagawa T, Okui T, Yamazaki K. Resveratrol suppresses the alveolar bone resorption induced by artificial trauma from occlusion in mice. Oral Dis 2017; 24:412-421. [PMID: 28944599 DOI: 10.1111/odi.12785] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 09/18/2017] [Accepted: 09/19/2017] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Besides inflammatory bone loss, trauma from occlusion (TO)-induced alveolar bone loss increases the risk of future tooth loss. We have shown that resveratrol, a polyphenol, possesses anti-inflammatory characteristics and a suppressive effect on osteoclastogenesis. Therefore, we investigated the effects of resveratrol on TO-induced bone loss in mice. MATERIAL AND METHODS Trauma from occlusion was induced by overlaying composite resin onto the maxillary first molar of C57BL/6 mice. TO-induced mice were administered either resveratrol or vehicle for 15 days from 5 days before TO induction. The mice administered vehicle only served as controls. The effect of resveratrol on bone resorption was assessed histologically. Gene expression in gingival and periodontal ligament tissues was analyzed. In vitro effect of resveratrol on the differentiation of RAW 264.7 cells and bone marrow-derived macrophages into osteoclastic cells was analyzed. RESULTS Resveratrol administration significantly decreased the bone loss and suppressed the elevated expression of osteoclastogenesis-related gene in periodontal ligament tissue by TO. Resveratrol treatment also suppressed the differentiation of both RAW 264.7 cells and bone marrow-derived macrophages into osteoclastic cells. CONCLUSION Resveratrol administration suppressed the TO-induced alveolar bone loss by suppressing osteoclast differentiation, suggesting that resveratrol is effective in preventing both inflammation and mechanical stress-induced alveolar bone resorption.
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Affiliation(s)
- Y Matsuda
- Research Unit for Oral-Systemic Connection, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Periodontology, Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Minagawa
- Research Unit for Oral-Systemic Connection, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Periodontology, Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - T Okui
- Research Unit for Oral-Systemic Connection, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Periodontology, Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Yamazaki
- Research Unit for Oral-Systemic Connection, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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26
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Amaral MF, Poi WR, Debortoli CVL, Panzarini SR, Brandini DA. The influence of traumatic occlusion on the repair process for teeth following subluxation. Dent Traumatol 2017; 33:245-254. [DOI: 10.1111/edt.12330] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Marina Fuzette Amaral
- Surgery and Integrated Clinics; Faculdade de Odontologia; UNESP-Universidade Estadual Paulista, Araçatuba; Araçatuba São Paulo Brazil
| | - Wilson Roberto Poi
- Surgery and Integrated Clinics; Faculdade de Odontologia; UNESP-Universidade Estadual Paulista, Araçatuba; Araçatuba São Paulo Brazil
| | - Caio Vinicius Lourenço Debortoli
- Surgery and Integrated Clinics; Faculdade de Odontologia; UNESP-Universidade Estadual Paulista, Araçatuba; Araçatuba São Paulo Brazil
| | - Sônia Regina Panzarini
- Surgery and Integrated Clinics; Faculdade de Odontologia; UNESP-Universidade Estadual Paulista, Araçatuba; Araçatuba São Paulo Brazil
| | - Daniela Atili Brandini
- Surgery and Integrated Clinics; Faculdade de Odontologia; UNESP-Universidade Estadual Paulista, Araçatuba; Araçatuba São Paulo Brazil
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27
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Abstract
The impact of tooth mobility and occlusal trauma (OT) on periodontal bone loss and need for therapy has been debated for many years. This paper summarizes the relevant literature reported in three Dental Clinics of North America articles in the late 1990s, and adds newer information from the 2000s. Principle findings indicate that strong evidence of mobility and OT impacting tooth longevity is lacking, but reducing inflammation in the surrounding periodontium remains a critical treatment. Occlusal therapy when mobility is increasing, comfort or function are compromised, or periodontal regeneration procedures are planned should be considered.
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Affiliation(s)
- Richard A Reinhardt
- Department of Surgical Specialties, University of Nebraska Medical Center College of Dentistry, 4000 East Campus Loop South, Lincoln, NE 68583-0740, USA.
| | - Amy C Killeen
- Department of Surgical Specialties, University of Nebraska Medical Center College of Dentistry, 4000 East Campus Loop South, Lincoln, NE 68583-0740, USA
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28
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Soenjaya Y, Foster BL, Nociti FH, Ao M, Holdsworth DW, Hunter GK, Somerman MJ, Goldberg HA. Mechanical Forces Exacerbate Periodontal Defects in Bsp-null Mice. J Dent Res 2015; 94:1276-85. [PMID: 26130257 DOI: 10.1177/0022034515592581] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Bone sialoprotein (BSP) is an acidic phosphoprotein with collagen-binding, cell attachment, and hydroxyapatite-nucleating properties. BSP expression in mineralized tissues is upregulated at onset of mineralization. Bsp-null (Bsp(-/-)) mice exhibit reductions in bone mineral density, bone turnover, osteoclast activation, and impaired bone healing. Furthermore, Bsp(-/-) mice have marked periodontal tissue breakdown, with a lack of acellular cementum leading to periodontal ligament detachment, extensive alveolar bone and tooth root resorption, and incisor malocclusion. We hypothesized that altered mechanical stress from mastication contributes to periodontal destruction observed in Bsp(-/-) mice. This hypothesis was tested by comparing Bsp(-/-) and wild-type mice fed with standard hard pellet diet or soft powder diet. Dentoalveolar tissues were analyzed using histology and micro-computed tomography. By 8 wk of age, Bsp(-/-) mice exhibited molar and incisor malocclusion regardless of diet. Bsp(-/-) mice with hard pellet diet exhibited high incidence (30%) of severe incisor malocclusion, 10% lower body weight, 3% reduced femur length, and 30% elevated serum alkaline phosphatase activity compared to wild type. Soft powder diet reduced severe incisor malocclusion incidence to 3% in Bsp(-/-) mice, supporting the hypothesis that occlusal loading contributed to the malocclusion phenotype. Furthermore, Bsp(-/-) mice in the soft powder diet group featured normal body weight, long bone length, and serum alkaline phosphatase activity, suggesting that tooth dysfunction and malnutrition contribute to growth and skeletal defects reported in Bsp(-/-) mice. Bsp(-/-) incisors also erupt at a slower rate, which likely leads to the observed thickened dentin and enhanced mineralization of dentin and enamel toward the apical end. We propose that the decrease in eruption rate is due to a lack of acellular cementum and associated defective periodontal attachment. These data demonstrate the importance of BSP in maintaining proper periodontal function and alveolar bone remodeling and point to dental dysfunction as causative factor of skeletal defects observed in Bsp(-/-) mice.
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Affiliation(s)
- Y Soenjaya
- Biomedical Engineering Program, University of Western Ontario, London, Canada School of Dentistry, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Canada
| | - B L Foster
- National Institute for Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - F H Nociti
- National Institute for Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA Department of Prosthodontics and Periodontics, Division of Periodontics, School of Dentistry, Campinas State University, Piracicaba, Brazil
| | - M Ao
- National Institute for Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - D W Holdsworth
- Biomedical Engineering Program, University of Western Ontario, London, Canada School of Dentistry, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Canada Imaging Research Laboratories, Robarts Research Institute, University of Western Ontario, London, Canada
| | - G K Hunter
- Biomedical Engineering Program, University of Western Ontario, London, Canada School of Dentistry, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Canada Deparment of Biochemistry, University of Western Ontario, London, Canada
| | - M J Somerman
- National Institute for Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA
| | - H A Goldberg
- Biomedical Engineering Program, University of Western Ontario, London, Canada School of Dentistry, Schulich School of Medicine & Dentistry, University of Western Ontario, London, Canada Deparment of Biochemistry, University of Western Ontario, London, Canada
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29
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Kaku M, Yamauchi M. Mechano-regulation of collagen biosynthesis in periodontal ligament. J Prosthodont Res 2014; 58:193-207. [PMID: 25311991 DOI: 10.1016/j.jpor.2014.08.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 08/25/2014] [Indexed: 12/12/2022]
Abstract
Periodontal ligament (PDL) plays critical roles in the development and maintenance of periodontium such as tooth eruption and dissipation of masticatory force. The mechanical properties of PDL are mainly derived from fibrillar type I collagen, the most abundant extracellular component. The biosynthesis of type I collagen is a long, complex process including a number of intra- and extracellular post-translational modifications. The final modification step is the formation of covalent intra- and intermolecular cross-links that provide collagen fibrils with stability and connectivity. It is now clear that collagen post-translational modifications are regulated by groups of specific enzymes and associated molecules in a tissue-specific manner; and these modifications appear to change in response to mechanical force. This review focuses on the effect of mechanical loading on collagen biosynthesis and fibrillogenesis in PDL with emphasis on the post-translational modifications of collagens, which is an important molecular aspect to understand in the field of prosthetic dentistry.
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Affiliation(s)
- Masaru Kaku
- Division of Bioprosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
| | - Mitsuo Yamauchi
- North Carolina Oral Health Institute, University of North Carolina at Chapel Hill, NC, USA
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30
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CD14 and TNFα single nucleotide polymorphisms are candidates for genetic biomarkers of peri-implantitis. Clin Oral Investig 2014; 19:791-801. [DOI: 10.1007/s00784-014-1313-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 08/26/2014] [Indexed: 10/24/2022]
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31
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Fujihara R, Usui M, Yamamoto G, Nishii K, Tsukamoto Y, Okamatsu Y, Sato T, Asou Y, Nakashima K, Yamamoto M. Tumor necrosis factor-α enhances RANKL expression in gingival epithelial cells via protein kinase A signaling. J Periodontal Res 2013; 49:508-17. [DOI: 10.1111/jre.12131] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2013] [Indexed: 01/11/2023]
Affiliation(s)
- R. Fujihara
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
| | - M. Usui
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
- Division of Periodontology; Departmetnt of Cariology and Periodontology; Kyushu Dental University; Kitakyushu City Fukuoka Japan
| | - G. Yamamoto
- Department of Oral Pathology and Diagnosis; Showa University School of Dentistry; Tokyo Japan
| | - K. Nishii
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
- Department of Oral Pathology and Diagnosis; Showa University School of Dentistry; Tokyo Japan
| | - Y. Tsukamoto
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
| | - Y. Okamatsu
- Dental Clinic; Showa University Medical Hospital; Tokyo Japan
| | - T. Sato
- Department of Oral and Maxillofacial Surgery; Saitama Medical University; Saitama Japan
| | - Y. Asou
- Department of Orthopaedic Surgery; Tokyo Medical and Dental University; Tokyo Japan
| | - K. Nakashima
- Division of Periodontology; Departmetnt of Cariology and Periodontology; Kyushu Dental University; Kitakyushu City Fukuoka Japan
| | - M. Yamamoto
- Department of Periodontology; Showa University School of Dentistry; Tokyo Japan
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32
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Nakatsu S, Yoshinaga Y, Kuramoto A, Nagano F, Ichimura I, Oshino K, Yoshimura A, Yano Y, Hara Y. Occlusal trauma accelerates attachment loss at the onset of experimental periodontitis in rats. J Periodontal Res 2013; 49:314-22. [PMID: 23808820 DOI: 10.1111/jre.12109] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2013] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND OBJECTIVE Occlusal trauma is an important factor that influences the progression of periodontitis, but it is unclear whether occlusal trauma influences periodontal destruction at the onset of periodontitis. We established an experimental periodontitis model with both site-specific loss of attachment and alveolar bone resorption. The purpose of the present study was to investigate the effects of occlusal trauma on periodontal destruction, particularly loss of attachment, at the onset of experimental periodontitis. MATERIAL AND METHODS Sixty rats were used in the present study. Forty-eight rats immunized with lipopolysaccharide (LPS) intraperitoneally were divided into four groups. In the trauma (T) group, occlusal trauma was induced by placing an excessively high metal wire in the occlusal surface of the mandibular right first molar. In the inflammation (I) group, periodontal inflammation was induced by topical application of LPS into the palatal gingival sulcus of maxillary right first molars. In the trauma + inflammation (T+I) group, both trauma and periodontal inflammation were simultaneously induced. The PBS group was administered phosphate-buffered saline only. Another 12 nonimmunized rats (the n-(T+I) group) were treated as described for the T+I group. All rats were killed after 5 or 10 d, and their maxillary first molars with surrounding tissues were observed histopathologically. Loss of attachment and osteoclasts on the alveolar bone crest were investigated histopathologically. To detect immune complexes, immunohistological staining for C1qB was performed. Collagen fibers were also observed using the picrosirius red-polarization method. RESULTS There were significant increases in loss of attachment and in the number of osteoclasts in the T+I group compared with the other groups. Moreover, widespread distribution of immune complexes was observed in the T + I group, and collagen fibers oriented from the root surface to the alveolar bone crest had partially disappeared in the T, T+I and n-(T+I) groups. CONCLUSION When inflammation was combined with occlusal trauma, immune complexes were confirmed in more expanding areas than in the area of the I group without occlusal trauma, and loss of attachment at the onset of experimental periodontitis was increased. Damage of collagen fibers by occlusal trauma may elevate the permeability of the antigen through the tissue and result in expansion of the area of immune-complex formation and accelerating inflammatory reaction. The periodontal tissue destruction was thus greater in the T+I group than in the I group.
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Affiliation(s)
- S Nakatsu
- Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Global R&D - Personal Health Care, Kao Corporation, Tokyo, Japan
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33
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Campos MLG, Corrêa MG, Júnior FHN, Casati MZ, Sallum EA, Sallum AW. Cigarette smoke inhalation increases the alveolar bone loss caused by primary occlusal trauma in a rat model. J Periodontal Res 2013; 49:179-85. [PMID: 23679047 DOI: 10.1111/jre.12091] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2013] [Indexed: 01/25/2023]
Abstract
BACKGROUND AND OBJECTIVE Occlusal trauma (OT) and smoking are both factors that alter alveolar bone metabolism and therefore could synergistically act on alveolar bone loss. The aim of this experimental study was to evaluate the influence of short-term cigarette smoke inhalation (CSI) on inter-radicular alveolar bone loss promoted by primary OT in a rat model. MATERIAL AND METHODS Forty-eight animals were randomly assigned to one of three groups based on treatment type: OT + CSI (n = 16), animals were exposed to CSI three times per day, for 8 min per exposure, and they concomitantly received unilateral vertical augmentation creating an occlusal interference inducing experimental OT; OT (n = 16), animals received only unilateral vertical augmentation; negative control (NC; n = 16), animals maintained for equal periods to achieve periodontal baseline values of periodontal ligament dimension. Each group was divided into two subgroups (n = 8) based on treatment length: 7 or 14 d. RESULTS After 7 d, the OT + CSI group exhibited significantly higher bone loss compared to the NC group (p = 0.0022). After 14 d, the OT (p < 0.0001) and OT + CSI (p < 0.0001) groups presented significantly higher bone loss compared to the NC group, and OT + CSI resulted in significantly higher bone loss than OT alone (p = 0.0241). The number of tartrate-resistant acid phosphatase-positive cells on the linear surface of the bone crest after 7 d was significantly higher in the OT + CSI group as compared to the NC and OT groups (p < 0.0001 and p = 0.0045, respectively) and remained significantly higher in the OT + CSI group after 14 d, compared to the OT group (p < 0.0001). CONCLUSION Short-term CSI increases early bone loss in association with OT after 7 d, and this worsens in severity after 14 d of exposure.
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Affiliation(s)
- M L G Campos
- Department of Prosthodontics and Periodontics, Division of Periodontics, Piracicaba Dental School, State University of Campinas - UNICAMP, Piracicaba, Brazil
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34
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Liu H, Jiang H, Wang Y. The biological effects of occlusal trauma on the stomatognathic system - a focus on animal studies. J Oral Rehabil 2012; 40:130-8. [PMID: 23211044 DOI: 10.1111/joor.12017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2012] [Indexed: 12/19/2022]
Affiliation(s)
- H. Liu
- Department of Stomatology; Chinese PLA General Hospital; Beijing China
| | - H. Jiang
- Department of Stomatology; Chinese PLA General Hospital; Beijing China
| | - Y. Wang
- Department of Stomatology; Chinese PLA General Hospital; Beijing China
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Tsutsumi T, Kajiya H, Goto K, Takahashi Y, Okabe K. Hyperocclusion Up-regulates CCL3 Expression in CCL2- and CCR2-deficient Mice. J Dent Res 2012; 92:65-70. [DOI: 10.1177/0022034512467803] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Excessive mechanical stress (MS) during hyperocclusion is known to result in disappearance of the alveolar hard line, enlargement of the periodontal ligament (PDL) space, and destruction of alveolar bone, leading to occlusal traumatism. We have recently reported that MS induces predominantly C-C chemokine ligand (CCL) 2 expression in PDL tissues, leading, via C-C chemokine receptor (CCR) 2, to MS-dependent osteoclastogenesis in alveolar bone. Thus, we hypothesize that ablation of the CCL2/CCR2 signaling pathway should suppress MS-induced osteoclastogenesis-associated chemokines and alleviate occlusal traumatism. We examined the effect of MS on chemokine expression and osteoclastogenesis using in vivo and in vitro hyperocclusion models with CCL2-deficient (CCL2(-/-)) and CCR2-deficient (CCR2(-/-)) mice. Compared with that in wild-type mice, expression of CCL3 in PDL cells and TRAP-positive cells in alveolar bone from CCL2(-/-) and CCR2(-/-) mice was up-regulated, even in the absence of MS. Furthermore, the expression of CCL3 and TRAP-positive cells was significantly increased after both 4 and 7 days of hyperocclusal MS loading in CCL2(-/-) and CCR2(-/-) mice. Hyperocclusion induced compensatory CCL3 expression and promoted osteoclastogenesis to counterbalance deficient CCL2/CCR2 signaling, suggesting that co-expression of CCL3 with CCL2 may precipitate synergistic, MS-dependent alveolar bone destruction during occlusal traumatism. Abbreviations: MS, mechanical stress; PDL, periodontal ligament; CCL2, CC chemokine ligand 2 (MCP-1; monocyte chemoattractant protein-1); CCR2, CC chemokine receptor 2; CCL3, CC chemokine ligand 3 (MIP-1α); CCL5, CC chemokine ligand 5 (RANTES).
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Affiliation(s)
- T. Tsutsumi
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - H. Kajiya
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - K.T. Goto
- Department of Dental Hygiene, Fukuoka College of Health Sciences, Fukuoka, Japan
| | - Y. Takahashi
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - K. Okabe
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
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Rakic M, Lekovic V, Nikolic-Jakoba N, Vojvodic D, Petkovic-Curcin A, Sanz M. Bone loss biomarkers associated with peri-implantitis. A cross-sectional study. Clin Oral Implants Res 2012; 24:1110-6. [PMID: 22708989 DOI: 10.1111/j.1600-0501.2012.02518.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2012] [Indexed: 11/30/2022]
Abstract
AIM To investigate the levels of biomarkers associated with osteoclastogenesis in patients suffering peri-implantitis and to compare them with levels in healthy peri-implant sites and severe chronic periodontitis. MATERIAL AND METHODS Peri-implant/gingival crevicular fluid samples and clinical parameters including: bleeding on probing, modified Plaque Index (PlI), pocket depth and clinical attachment level were collected from 70 patients (23 with peri-implantitis, 25 with healthy peri-implant tissues and 22 with severe chronic periodontitis). The concentrations of sRANKL, RANK and OPG were evaluated using enzyme-linked immunosorbent assays; they were compared between the groups and correlated with the clinical findings. RESULTS sRANKL (P = 0.01), RANK (P = 0.01) and OPG (P = 0.03) concentrations were significantly higher in peri-implantitis sites when compared to those in healthy implant sites, although differences in the sRANKL/OPG ratio were not statistically significant. In these sites all three markers were significantly correlated with the clinical parameters, with exception of OPG/PI correlation that remained insignificant (P = 0.121). When comparing peri-implantitis and periodontitis findings, RANK was significantly higher in peri-implantitis sites whereas, sRANKL (P = 0.03) and sRANKL/OPG ratio (P = 0.004) were significantly higher in periodontitis sites. Among periodontitis and healthy implant sites the same differences have been observed for both sRANKL (P = 0.000) and sRANKL/OPG ratio (P = 0.000), furthermore RANK was higher in periodontitis sites as well (P = 0.010). CONCLUSION The findings of this preliminary study on a relatively small sample size suggest that the PICF levels of biomarkers sRANKL, RANK, and OPG are associated with peri-implant tissue destruction and the pattern of these biomarkers differed when compared to periodontitis.
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Affiliation(s)
- Mia Rakic
- Department for Periodontology and Oral Medicine, Faculty of Dental Medicine, University of Belgrade, Belgrade, Serbia.
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The early phase response of rat alveolar bone to traumatic occlusion. Arch Oral Biol 2012; 57:737-43. [DOI: 10.1016/j.archoralbio.2012.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 12/27/2011] [Accepted: 01/07/2012] [Indexed: 11/15/2022]
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Aliprantis AO, Stolina M, Kostenuik PJ, Poliachik SL, Warner SE, Bain SD, Gross TS. Transient muscle paralysis degrades bone via rapid osteoclastogenesis. FASEB J 2011; 26:1110-8. [PMID: 22125315 DOI: 10.1096/fj.11-196642] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A unilateral injection of botulinum toxin A (BTxA) in the calf induces paralysis and profound loss of ipsalateral trabecular bone within days. However, the cellular mechanism underlying acute muscle paralysis-induced bone loss (MPIBL) is poorly understood. We hypothesized that MPIBL arises via rapid and extensive osteoclastogenesis. We performed a series of in vivo experiments to explore this thesis. First, we observed elevated levels of the proosteoclastogenic cytokine receptor activator for nuclear factor-κB ligand (RANKL) within the proximal tibia metaphysis at 7 d after muscle paralysis (+113%, P<0.02). Accordingly, osteoclast numbers were increased 122% compared with the contralateral limb at 5 d after paralysis (P=0.04) and MPIBL was completely blocked by treatment with human recombinant osteoprotegerin (hrOPG). Further, conditional deletion of nuclear factor of activated T-cells c1 (NFATc1), the master regulator of osteoclastogenesis, completely inhibited trabecular bone loss (-2.2±11.9%, P<0.01). All experiments included negative control assessments of contralateral limbs and/or within-animal pre- and postintervention imaging. In summary, transient muscle paralysis induced acute RANKL-mediated osteoclastogenesis resulting in profound local bone resorption. Elucidation of the pathways that initiate osteoclastogenesis after paralysis may identify novel targets to inhibit bone loss and prevent fractures.
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Affiliation(s)
- Antonios O Aliprantis
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Goto K, Kajiya H, Nemoto T, Tsutsumi T, Tsuzuki T, Sato H, Okabe K. Hyperocclusion Stimulates Osteoclastogenesis via CCL2 Expression. J Dent Res 2011; 90:793-8. [DOI: 10.1177/0022034511400742] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Excessive mechanical stress (MS) during hyperocclusion is known to result in disappearance of the alveolar hard line, enlargement of the periodontal ligament (PDL) space, and destruction of alveolar bone, leading to occlusal traumatism. We hypothesized that MS induces expression of osteoclastogenesis-associated chemokines in PDL tissue, resulting in chemotaxis and osteoclastogenesis during occlusal traumatism. We examined the effect of MS on relationships between chemokine expression and osteoclastogenesis using in vivo and in vitro hyperocclusion models. In an in vitro model, intermittent stretching-induced MS was shown to up-regulate the expression of CC chemokine ligand (CCL)2, CCL3, and CCL5 in PDL cells. The expression levels of CCL2 in PDL tissues, its receptor CCR2 in pre-osteoclasts, and tartrate-resistant acid-phosphatase-positive cells in alveolar bone were significantly up-regulated 4-7 days after excessive MS during hyperocclusion in in vivo rodent models. Hyperocclusion predominantly induced CCL2 expression in PDL tissues and promoted chemotaxis and osteoclastogenesis, leading to MS-dependent alveolar bone destruction during occlusal traumatism. Abbreviations: MS, mechanical stress; PDL, periodontal ligament; CCL2, CC chemokine ligand 2; MCP-1, monocyte chemoattractant protein-1; CCR2, CC chemokine receptor 2; CCL3, CC chemokine ligand 3 (MIP-1α); CCL5, CC chemokine ligand 5 (RANTES); CXCL12, CXC chemokine ligand 12 (SDF-1).
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Affiliation(s)
- K.T. Goto
- Department of Dental Hygiene, Fukuoka College of Health Sciences, Fukuoka 8140193, Japan Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - H. Kajiya
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Nemoto
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Tsutsumi
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
| | - T. Tsuzuki
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - H. Sato
- Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka 8140193, Japan
| | - K. Okabe
- Department of Physiological Science and Molecular Biology, Fukuoka Dental College, 2-15-1 Tamura, Sawara-ku, Fukuoka 8140193, Japan
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Ayon Haro ER, Ukai T, Yokoyama M, Kishimoto T, Yoshinaga Y, Hara Y. Locally administered interferon-γ accelerates lipopolysaccharide-induced osteoclastogenesis independent of immunohistological RANKL upregulation. J Periodontal Res 2011; 46:361-73. [PMID: 21361961 DOI: 10.1111/j.1600-0765.2011.01352.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND AND OBJECTIVE Interferon-γ (IFN-γ) potently inhibits RANKL-induced osteoclastogenesis in vitro. In contrast, previous studies have shown that an increase in IFN-γ expression is correlated with an increase in lipopolysaccharide (LPS)-induced bone loss in vivo. However, it is not clear whether local IFN-γ accelerates osteoclastogenesis or not in vivo. Therefore, the aim of this study was to clarify the role of local IFN-γ in LPS-induced osteoclastogenesis. MATERIALS AND METHODS We induced bone loss in calvaria by injecting LPS. One group of mice received an IFN-γ injection together with LPS injection, while another group received IFN-γ 2 d after LPS injection. Bone resorption was observed histologically. Next, we stimulated murine bone marrow macrophages with macrophage-colony stimulating factor and RANKL in vitro. We added different doses of IFN-γ and/or LPS at 0 or 48 h time points. Cells were stained with tartrate-resistant acid phosphatase at 72 h. RESULTS Local administration of IFN-γ together with LPS injection did not affect osteoclast formation. However, IFN-γ injected after LPS injection accelerated osteoclast formation. Also, we confirmed that IFN-γ added at 0 h inhibited RANKL-induced osteoclastogenesis in vitro. However, inhibition by IFN-γ added at 48 h was reduced compared with that by IFN-γ added at 0 h. Interestingly, IFN-γ together with a low concentration of LPS accelerated osteoclast formation when both were added at 48 h compared with no addition of IFN-γ. CONCLUSION The results suggest that local IFN-γ accelerates osteoclastogenesis in certain conditions of LPS-induced inflammatory bone loss.
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Affiliation(s)
- E R Ayon Haro
- Unit of Translational Medicine, Course of Medical and Dental Sciences, Department of Periodontology, Nagasaki University Graduate School of Biomedical Sciences, Japan
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Differential induction of collagens by mechanical stress in human periodontal ligament cells. Arch Oral Biol 2010; 55:981-7. [DOI: 10.1016/j.archoralbio.2010.08.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 07/30/2010] [Accepted: 08/16/2010] [Indexed: 11/19/2022]
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Walker CG, Ito Y, Dangaria S, Luan X, Diekwisch TGH. RANKL, osteopontin, and osteoclast homeostasis in a hyperocclusion mouse model. Eur J Oral Sci 2008; 116:312-8. [PMID: 18705798 DOI: 10.1111/j.1600-0722.2008.00545.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The biological mechanisms that maintain the position of teeth in their sockets establish a dynamic equilibrium between bone resorption and apposition. In order to reveal some of the dynamics involved in the tissue responses towards occlusal forces on periodontal ligament (PDL) and alveolar bone homeostasis, we developed the first mouse model of hyperocclusion. Swiss-Webster mice were kept in hyperocclusion for 0, 3, 6, and 9 d. Morphological and histological changes in the periodontium were assessed using micro-computed tomography (micro-CT) and ground sections with fluorescent detection of vital dye labels. Sections were stained for tartrate-resistant acid phosphatase, and the expression of receptor activator of nuclear factor-kappaB ligand (RANKL) and osteopontin (OPN) was analyzed by immunohistochemistry and real-time polymerase chain reaction (PCR). Traumatic occlusion resulted in enamel surface abrasion, inhibition of alveolar bone apposition, significant formation of osteoclasts at 3, 6 and 9 d, and upregulation of OPN and RANKL. Data from this study suggest that both OPN and RANKL contribute to the stimulation of bone resorption in the hyperocclusive state. In addition, we propose that the inhibition of alveolar bone apposition by occlusal forces is an important mechanism for the control of occlusal height that might work in synergy with RANKL-induced bone resorption to maintain normal occlusion.
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Affiliation(s)
- Cameron G Walker
- Department of Oral Biology, University of Illinois at Chicago, College of Dentistry, Chicago, IL 60612, USA
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