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P JE, T N U. Distinctive Anatomical Patterns of the Mandibular Coronoid Process, Condyle, and Sigmoid Notch: Cone Beam Computed Tomography (CBCT) Imaging for Advanced Personal Identification. Cureus 2024; 16:e60978. [PMID: 38910783 PMCID: PMC11193888 DOI: 10.7759/cureus.60978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 05/24/2024] [Indexed: 06/25/2024] Open
Abstract
INTRODUCTION The human mandible plays a significant role in personal identification due to its unique morphological characteristics. The coronoid process, condyle, and sigmoid notch exhibit variations that can be utilized for forensic and anthropological purposes. This study aims to analyze the morphological diversities of these mandibular features in our ethnic group using cone beam computed tomography (CBCT) imaging. MATERIALS AND METHODS A retrospective analysis was conducted using 100 CBCT images obtained from the archives of the Department of Oral Medicine and Radiology. The images were captured using Carestream 9600 machines (Carestream Dental LLC, Atlanta, GA) with standard exposure parameters. Curved slicing screenshots were utilized for tracing the morphological variations of the coronoid process, condyle, and sigmoid notch. RESULTS Out of 100 CBCT images analyzed (corresponding to 200 sides), the shape-wise distribution of the coronoid process revealed that a triangular shape was most commonly observed in 59% (118) of cases. The condyle exhibited a predominantly round shape in 38.7% (77) of cases based on shape parameter-wise distribution. Similarly, the sigmoid notch displayed a round shape in 40.5% (81) of cases based on shape-wise distribution. CONCLUSION Personal identification using radiographs has gained significance in the current scenario due to its feasibility. Cone beam computed tomography imaging has become a reliable and accurate method for revealing hidden details in forensic odontology, especially when antemortem records are available. This research sheds light on the morphological variations of the mandibular coronoid process, condyle, and sigmoid notch within our ethnic cohort, enhancing personal identification practices. Further research encompassing larger sample sizes and diverse populations would enhance the applicability of these findings in forensic and anthropological contexts.
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Affiliation(s)
- Jency Evanjelin P
- Department of Oral Medicine and Radiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Umamaheswari T N
- Department of Oral Medicine and Radiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
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Rongo R, Michelotti A, Pedersen TK, Resnick CM, Stoustrup P. Management of temporomandibular joint arthritis in children and adolescents: An introduction for orthodontists. Orthod Craniofac Res 2023; 26 Suppl 1:151-163. [PMID: 37226648 DOI: 10.1111/ocr.12676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 05/02/2023] [Indexed: 05/26/2023]
Abstract
Juvenile idiopathic arthritis (JIA) is the most common inflammatory rheumatic disease of childhood. JIA can affect any joint and the temporomandibular joint (TMJ) is one of the joints most frequently involved. TMJ arthritis impacts mandibular growth and development and can result in skeletal deformity (convex profile and facial asymmetry), and malocclusion. Furthermore, when TMJs are affected, patients may present with pain at joint and masticatory muscles and dysfunction with crepitus and limited jaw movement. This review aims to describe the role of orthodontists in the management of patients with JIA and TMJ involvement. This article is an overview of evidence for the diagnosis and treatment of patients with JIA and TMJ involvement. Screening for the orofacial manifestation of JIA is important for orthodontists to identify TMJ involvement and related dentofacial deformity. The treatment protocol of JIA with TMJ involvement requires an interdisciplinary collaboration including orthopaedic/orthodontic treatment and surgical interventions for the management of growth disturbances. Orthodontists are also involved in the management of orofacial signs and symptoms; behavioural therapy, physiotherapy and occlusal splints are the suggested treatments. Patients with TMJ arthritis require specific expertise from an interdisciplinary team with members knowledgeable in JIA care. Since disorders of mandibular growth often appear during childhood, the orthodontist could be the first clinician to see the patient and can play a crucial role in the diagnosis and management of JIA patients with TMJ involvement.
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Affiliation(s)
- Roberto Rongo
- Department of Neurosciences, Reproductive sciences and Oral Sciences, School of Orthodontics, University of Naples "Federico II", Naples, Italy
| | - Ambrosina Michelotti
- Department of Neurosciences, Reproductive sciences and Oral Sciences, School of Orthodontics, University of Naples "Federico II", Naples, Italy
| | - Thomas Klit Pedersen
- Department of Dentistry and Oral Health, Section of Orthodontics, Aarhus University, Aarhus, Denmark
- Department of Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Cory M Resnick
- Department of Oral and Maxillofacial Surgery, Harvard School of Dental Medicine and Harvard Medical School, Boston, MA, USA
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA
| | - Peter Stoustrup
- Department of Dentistry and Oral Health, Section of Orthodontics, Aarhus University, Aarhus, Denmark
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Helmer LML, Klop C, Lobbezoo F, Lange JD, Koolstra JH, Dubois L. Changes in load distribution after unilateral condylar fracture: A finite element model study. Arch Oral Biol 2023; 155:105791. [PMID: 37598527 DOI: 10.1016/j.archoralbio.2023.105791] [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: 03/22/2023] [Revised: 08/03/2023] [Accepted: 08/14/2023] [Indexed: 08/22/2023]
Abstract
OBJECTIVE Premature dental contact on the fractured side and a contralateral open bite are signs of a unilaterally fractured condyle of the temporomandibular joint (TMJ). The lateral pterygoid muscle pulls the condyle inwards, causing angulation of the fractured part and shortening of the ramus. This imbalance after fracture might change the load in both TMJs and consequently induce remodeling. The present study aimed to calculate this change in load. It is hypothesized to decrease on the fractured side and increase on the non-fractured side. DESIGN For these calculations, a finite element model (FEM) was used. In the FEM, shortening of the ramus varied from 2 mm to 16 mm; angulation, from 6.25° to 50°. RESULTS After fracture, load on the non-fractured side increased, but only at maximal mouth opening (MMO). Simultaneously, load on the fractured side decreased, at both timepoints, i.e., MMO and closed mouth. When comparing all simulations at those time points, i.e., from 2 mm and 6.25° to 16 mm and 50°, the load in the fractured condyle declines steadily. However, for both timepoints, a threshold stands out around 6 mm shortening and 18.75° angulation: visualization of the fractured condyle showed, apart from load on the condylar head, a second point of load more medial in the TMJ which was most evident in the 6 mm - 18.75° simulation. CONCLUSIONS These findings could implicate that the balance between both TMJs is more difficult to restore after a fracture with more than 6 mm shortening and more than 18.75° angulation.
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Affiliation(s)
- Loreine M L Helmer
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands; Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands.
| | - Cornelis Klop
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Jan de Lange
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Jan Harm Koolstra
- Department of Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, the Netherlands
| | - Leander Dubois
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
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Sun J, Zhu H, Lu C, Zhao J, Nie X, Yang Z, He D. Temporomandibular joint disc repositioning and occlusal splint for adolescents with skeletal class II malocclusion: a single-center, randomized, open-label trial. BMC Oral Health 2023; 23:694. [PMID: 37759222 PMCID: PMC10537145 DOI: 10.1186/s12903-023-03402-3] [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: 01/29/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Temporomandibular joint (TMJ) disc repositioning through open suturing (OSu) is a new disc repositioning method. Its result for adolescents with condylar resorption and dentofacial deformities combined with and without postoperative occlusal splints (POS) has not been well studied. OBJECTIVE This study was to evaluate and compare the effects of OSu with and without POS in the treatment of TMJ anterior disc displacement without reduction (ADDwoR) in adolescent skeletal Class II malocclusion. METHODS A total of 60 adolescents with bilateral ADDwoR were enrolled in this study. They were randomly allocated into two groups: OSu with and without POS. Magnetic resonance imaging (MRI) and lateral cephalometric radiographs were used to measure changes in condylar height and the degree of skeletal Class II malocclusion from before operation and at 12 months postoperatively. Changes in these indicators were compared within and between the two groups. RESULTS After OSu, both groups exhibited significant improvements in condylar height and occlusion at the end of 12 months follow-up (P < 0.05). The group of OSu with POS had significantly more new bone formation (2.83 ± 0.75 mm vs. 1.42 ± 0.81 mm, P < 0.001) and improvement in dentofacial deformity than the group of OSu only (P < 0.05). The new bone height was significantly correlated with POS (P < 0.001), the changes of SNB (P = 0.018), overjet (P = 0.012), and Wits appraisal (P < 0.001). CONCLUSION These findings indicated that OSu can effectively stimulate condylar regeneration and improve skeletal Class II malocclusion in adolescents with bilateral ADDwoR. The results are better when combined with POS. TRIAL REGISTRATION This trial was prospectively registered on the chictr.org.cn registry with ID: ChiCTR1900021821 on 11/03/2019.
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Affiliation(s)
- Jiali Sun
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Huimin Zhu
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Chuan Lu
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Jieyun Zhao
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Xin Nie
- Biostatistics Office of Clinical Research Unit, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Zhi Yang
- Department of Oral and Cranio-maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China.
| | - Dongmei He
- Department of Oral Surgery, Ninth People's Hospital, College of Stomatology, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China.
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Helmer LML, Klop C, Lobbezoo F, de Lange J, Koolstra JH, Dubois L. Load distribution after unilateral condylar fracture with shortening of the ramus: a finite element model study. Head Face Med 2023; 19:27. [PMID: 37422658 DOI: 10.1186/s13005-023-00370-5] [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: 02/01/2023] [Accepted: 06/19/2023] [Indexed: 07/10/2023] Open
Abstract
OBJECTIVES After a fracture of the condyle, the fractured ramus is often shortened, which causes premature dental contact on the fractured side and a contralateral open bite. The imbalance could change the load in the temporomandibular joints (TMJs). This change could lead to remodelling of the TMJs to compensate for the imbalance in the masticatory system. The load in the non-fractured condyle is expected to increase, and the load in the fractured condyle to decrease. MATERIALS AND METHODS These changes cannot be measured in a clinical situation. Therefore a finite element model (FEM) of the masticatory system was used. In the FEM a fractured right condyle with shortening of the ramus was induced, which varied from 2 to 16 mm. RESULTS Results show that, with a larger shortening of the ramus, the load in the fractured condyle decreases and the load in the non-fractured condyle increases. In the fractured condyle during closed mouth a major descent in load, hence a cut-off point, was visible between a shortening of 6 mm and 8 mm. CONCLUSIONS In conclusion, the change of load could be associated with remodelling on both condyles due to shortening of the ramus. CLINICAL RELEVANCE The cut-off point implies that shortening over 6 mm could present more difficulty for the body to compensate.
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Affiliation(s)
- Loreine M L Helmer
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
| | - Cornelis Klop
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Jan de Lange
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Jan Harm Koolstra
- Department of Functional Anatomy, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Leander Dubois
- Department of Oral and Maxillofacial Surgery, Amsterdam Academic Medical Centers and Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Zhou Y, Lin S, Huang Z, Zhang C, Wang H, Li B, Li H. Receptor-interacting protein 1 inhibition prevents mechanical stress-induced temporomandibular joint osteoarthritis by regulating apoptosis and later-stage necroptosis of chondrocytes. Arch Oral Biol 2023; 147:105612. [PMID: 36603515 DOI: 10.1016/j.archoralbio.2022.105612] [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: 07/26/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Temporomandibular joint osteoarthritis (TMJ OA) is a common degenerative joint disease that has multiple causes. The abnormal stress distribution is known to be an important trigger of TMJ OA. This article explored the pathological changes of the condylar cartilage under 60 g mechanical force and whether the inhibition of Receptor-interacting protein 1 (RIP1) can protect stress-induced TMJ OA. MATERIAL AND METHODS We used a compressive mechanical force-induced-TMJ OA model and Lenti-virus targeting RIP1 to perform this study. A total of 72 male rats were used in the animal experiment. Each rat was injected with a negative control Lenti-shRNA in the right TMJ and Lenti-siRIP1 in the left TMJ and euthanized after 4 and 7 days, respectively. Quantitative real-time PCR, immunohistochemistry, Tunnel staining and Micro-CT were used to detect cartilage pathological changes and one way ANOVA with LSD analysis was used to determine statistical significance between groups. RESULTS The results identified the characteristics of the spatio-temporal changes in stress-induced TMJ OA. Under mechanical force, inflammation and apoptosis, which occur in the whole layer of mandibular cartilage, appear on the 4th day and persist till the 7th day. Necroptosis arises in the later stage of mechanical force and is mainly located in the transition layer. RIP1 inhibition through Lenti-virus could protect stress-induced mandibular cartilage thinning by inhibiting persisted apoptosis and later-stage necroptosis in the transition layer. CONCLUSIONS RIP1 plays an essential role in the destruction of mandibular cartilage under mechanical force. RIP1 inhibition through Lenti-virus could protect mechanical stress-induced TMJ OA.
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Affiliation(s)
- Yiwen Zhou
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China
| | - Shuang Lin
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China
| | - Ziwei Huang
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China
| | - Caixia Zhang
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China
| | - Huijuan Wang
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China
| | - Baochao Li
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China
| | - Huang Li
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China; Medical School of Nanjing University, Nanjing, China.
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Cao Z, Yan Z, Wang J, Yang H, Han B, Gao J, Guo Y. Conditioned medium of PC‑3 prostate cancer cells affects microRNA and mRNA profiles in mechanically strained osteoblasts. Exp Ther Med 2023; 25:138. [PMID: 36845959 PMCID: PMC9947580 DOI: 10.3892/etm.2023.11837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 01/16/2023] [Indexed: 02/15/2023] Open
Abstract
Bone is the main site of metastasis from prostate cancer; therefore, it is important to investigate the microRNAs (miRNAs) and mRNA associated with bone metastases from prostate cancer. Since an appropriate mechanical environment is important in the growth of bone, in the present study, the miRNA, mRNA, and long non-coding RNA (lncRNA) profiles of mechanically strained osteoblasts treated with conditioned medium (CM) from PC-3 prostate cancer cells were studied. MC3T3-E1 osteoblastic cells were treated with the CM of PC-3 prostate cancer cells and were simultaneously stimulated with a mechanical tensile strain of 2,500 µε at 0.5 Hz; the osteoblastic differentiation of the MC3T3-E1 cells was then assessed. In addition, the differential expression levels of mRNA, miRNA and lncRNA in MC3T3-E1 cells treated with the CM of PC-3 cells were screened, and some of the miRNAs and mRNAs were verified by reverse transcription-quantitative PCR (RT-qPCR). The signal molecules and signaling pathways associated with osteogenic differentiation were predicted by bioinformatics analysis. The CM of PC-3 prostate cancer cells suppressed osteoblastic differentiation of MC3T3-E1 cells. A total of seven upregulated miRNAs and 12 downregulated miRNAs were selected by sequencing and further verified using RT-qPCR, and related differentially expressed genes (11 upregulated and 12 downregulated genes) were also selected by sequencing and further verified using RT-qPCR; subsequently, according to the enrichment of differentially expressed genes in signaling pathways, nine signaling pathways involved in osteogenic differentiation were screened out. Furthermore, a functional mRNA-miRNA-lncRNA regulatory network was constructed. The differentially expressed miRNAs, mRNAs and lncRNAs may provide a novel signature in bone metastases of prostate cancer. Notably, some of the signaling pathways and related genes may be associated with pathological osteogenic differentiation caused by bone metastasis of prostate cancer.
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Affiliation(s)
- Zhen Cao
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
- Department of Histology & Embryology, College of Basic Medical Sciences, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Zhixiong Yan
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
| | - Jiahui Wang
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
| | - Huan Yang
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
| | - Biao Han
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
| | - Jintao Gao
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
| | - Yong Guo
- Department of Biomedical Engineering, College of Biotechnology, Guilin Medical University, Guilin, Guangxi 541199, P.R. China
- Key Laboratory of Biochemistry and Molecular Biology, Guilin Medical University, Education Department of Guangxi Zhuang Autonomous Region, Guilin, Guangxi 541199, P.R. China
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Zhang J, Hu Y, Wang Z, Wu X, Yang C, Yang H. Hypoxia-inducible factor expression is related to apoptosis and cartilage degradation in temporomandibular joint osteoarthritis. BMC Musculoskelet Disord 2022; 23:583. [PMID: 35710352 PMCID: PMC9202126 DOI: 10.1186/s12891-022-05544-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 06/08/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It remains unclear etiology of cartilaginous tissues in osteoarthritis (OA) lesions. In this study, we hypothesized the accumulation of hypoxia-inducible factor (HIF) and activated apoptosis relate to condylar cartilage degeneration in vivo. METHODS Malocclusion stress was applied for 2 weeks, 4 weeks and 8 weeks to induce an OA-like lesion animal model in rats. Histological analysis was performed by H&E staining and Safranin O/fast green staining. The expression levels of protein in condylar cartilage were examined by immunostaining to evaluate cartilage degeneration. RESULTS We found apparent histological phenotypes associated with degeneration in the occlusion disorder (OD) stress group. The OD group at 4 weeks and 8 weeks had obviously reduced expression of Aggrecan (Acan) and type II collagen (Col II) in cartilage. In contrast, the OD groups had higher levels of ADAM metallopeptidase with thrombospondin type 5 (ADAMTS5) and matrix metallopeptidase 13 (MMP13) in the condylar cartilage than the control group. Moreover, the OD group cartilage had prominent degenerative changes with reduced levels of hypoxia inducible factor 1 alpha (HIF1α) and increased levels of hypoxia inducible factor 2 alpha (HIF2α) and the apoptosis factor Caspase3 in condylar cartilage at 8 weeks. CONCLUSION Thus, abnormal hypoxic conditions inducing Occlusion disorder stress results in cartilage degeneration. opposite expression patterns of HIF1α and HIF2α could be involved in the pathogenesis of condylar cartilage degeneration and chondrocyte apoptosis. HIF2α may provide a potential negative feedback mechanism for HIF1α during cartilage damage.
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Affiliation(s)
- Jun Zhang
- Yunnan Key Laboratory of Stomatology, School of Stomatology, Kunming Medical University, He Cheng Guo Ji Building C, 1088 Mid-Haiyuan Road, Kunming, 650100, Yunnan, China
| | - Yu Hu
- Department of Orthodontics, Kunming Medical University Affiliated Stomatological Hospital, Kunming, China
| | - Zihan Wang
- Yunnan Key Laboratory of Stomatology, School of Stomatology, Kunming Medical University, He Cheng Guo Ji Building C, 1088 Mid-Haiyuan Road, Kunming, 650100, Yunnan, China
| | - Xuelian Wu
- Honghe Health Vocational Collage, Honghe, Yunnan Province, China
| | - Chun Yang
- Yunnan Key Laboratory of Stomatology, School of Stomatology, Kunming Medical University, He Cheng Guo Ji Building C, 1088 Mid-Haiyuan Road, Kunming, 650100, Yunnan, China.
| | - Hefeng Yang
- Yunnan Key Laboratory of Stomatology, School of Stomatology, Kunming Medical University, He Cheng Guo Ji Building C, 1088 Mid-Haiyuan Road, Kunming, 650100, Yunnan, China.
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Ferreira NDR, Sanz CK, Raybolt A, Pereira CM, DosSantos MF. Action of Hyaluronic Acid as a Damage-Associated Molecular Pattern Molecule and Its Function on the Treatment of Temporomandibular Disorders. FRONTIERS IN PAIN RESEARCH 2022; 3:852249. [PMID: 35369538 PMCID: PMC8971669 DOI: 10.3389/fpain.2022.852249] [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: 01/11/2022] [Accepted: 02/14/2022] [Indexed: 11/13/2022] Open
Abstract
The temporomandibular joint is responsible for fundamental functions. However, mechanical overload or microtraumas can cause temporomandibular disorders (TMD). In addition to external factors, it is known that these conditions are involved in complex biological mechanisms, such as activation of the immune system, activation of the inflammatory process, and degradation of extracellular matrix (ECM) components. The ECM is a non-cellular three-dimensional macromolecular network; its most studied components is hyaluronic acid (HA). HA is naturally found in many tissues, and most of it has a high molecular weight. HA has attributed an essential role in the viscoelastic properties of the synovial fluid and other tissues. Additionally, it has been shown that HA molecules can contribute to other mechanisms in the processes of injury and healing. It has been speculated that the degradation product of high molecular weight HA in healthy tissues during injury, a low molecular weight HA, may act as damage-associated molecular patterns (DAMPs). DAMPs are multifunctional and structurally diverse molecules that play critical intracellular roles in the absence of injury or infection. However, after cellular damage or stress, these molecules promote the activation of the immune response. Fragments from the degradation of HA can also act as immune response activators. Low molecular weight HA would have the ability to act as a pro-inflammatory marker, promoting the activation and maturation of dendritic cells, the release of pro-inflammatory cytokines such as interleukin 1 beta (IL-1β), and tumor necrosis factor α (TNF-α). It also increases the expression of chemokines and cell proliferation. Many of the pro-inflammatory effects of low molecular weight HA are attributed to its interactions with the activation of toll-like receptors (TLRs 2 and 4). In contrast, the high molecular weight HA found in healthy tissues would act as an anti-inflammatory, inhibiting cell growth and differentiation, decreasing the production of inflammatory cytokines, and reducing phagocytosis by macrophages. These anti-inflammatory effects are mainly attributed to the interaction of high-weight HA with the CD44 receptor. In this study, we review the action of the HA as a DAMP and its functions on pain control, more specifically in orofacial origin (e.g., TMD).
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Affiliation(s)
- Natália dos Reis Ferreira
- Faculty of Medicine, Institute of Occlusion and Orofacial Pain, University of Coimbra, Coimbra, Portugal
| | - Carolina Kaminski Sanz
- Laboratório de Propriedades Mecânicas e Biologia Celular (PropBio), Departamento de Prótese e Materiais Dentários, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Programa de Engenharia Metalúrgica e de Materiais, COPPE, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Aline Raybolt
- Laboratório de Propriedades Mecânicas e Biologia Celular (PropBio), Departamento de Prótese e Materiais Dentários, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Cláudia Maria Pereira
- Laboratório de Propriedades Mecânicas e Biologia Celular (PropBio), Departamento de Prótese e Materiais Dentários, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Marcos Fabio DosSantos
- Laboratório de Propriedades Mecânicas e Biologia Celular (PropBio), Departamento de Prótese e Materiais Dentários, Faculdade de Odontologia, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Neurociência Translacional, Instituto Nacional de Neurociência Translacional (INNT-UFRJ), Rio de Janeiro, Brazil
- Programa de Pós-Graduação em Odontologia (PPGO), Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- *Correspondence: Marcos Fabio DosSantos ;
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10
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Xu M, Zhang X, He Y. An updated view on Temporomandibular Joint degeneration: insights from the cell subsets of mandibular condylar cartilage. Stem Cells Dev 2022; 31:445-459. [PMID: 35044232 DOI: 10.1089/scd.2021.0324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The high prevalence of temporomandibular joint osteoarthritis (TMJOA), which causes joint dysfunction, indicates the need for more effective methods for treatment and repair. Mandibular condylar cartilage (MCC), a typical fibrocartilage that experiences degenerative changes during the development of TMJOA, has become a research focus and therapeutic target in recent years. MCC is composed of four zones of cells at various stages of differentiation. The cell subsets in MCC exhibit different physiological and pathological characteristics during development and in TMJOA. Most studies of TMJOA are mainly concerned with gene regulation of pathological changes. The corresponding treatment targets with specific cell subsets in MCC may provide more accurate and reliable results for cartilage repair and TMJOA treatment. In this review, we summarized the current research progress on the cell subsets of MCC from the perspective of MCC development and degeneration. We hope to provide a reference for further exploration of the pathological process of TMJOA and improvement of TMJOA treatment.
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Affiliation(s)
- Minglu Xu
- Chongqing Medical University, 12550, Chongqing, Chongqing, China;
| | - Xuyang Zhang
- Chongqing Medical University, 12550, Chongqing, Chongqing, China;
| | - Yao He
- Chongqing Medical University, 12550, Chongqing, China, 400016;
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11
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Chandrasekaran P, Kwok B, Han B, Adams SM, Wang C, Chery DR, Mauck RL, Dyment NA, Lu XL, Frank DB, Koyama E, Birk DE, Han L. Type V Collagen Regulates the Structure and Biomechanics of TMJ Condylar Cartilage: A Fibrous-Hyaline Hybrid. Matrix Biol 2021; 102:1-19. [PMID: 34314838 DOI: 10.1016/j.matbio.2021.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 05/26/2021] [Accepted: 07/15/2021] [Indexed: 12/20/2022]
Abstract
This study queried the role of type V collagen in the post-natal growth of temporomandibular joint (TMJ) condylar cartilage, a hybrid tissue with a fibrocartilage layer covering a secondary hyaline cartilage layer. Integrating outcomes from histology, immunofluorescence imaging, electron microscopy and atomic force microscopy-based nanomechanical tests, we elucidated the impact of type V collagen reduction on TMJ condylar cartilage growth in the type V collagen haploinsufficiency and inducible knockout mice. Reduction of type V collagen led to significantly thickened collagen fibrils, decreased tissue modulus, reduced cell density and aberrant cell clustering in both the fibrous and hyaline layers. Post-natal growth of condylar cartilage involves the chondrogenesis of progenitor cells residing in the fibrous layer, which gives rise to the secondary hyaline layer. Loss of type V collagen resulted in reduced proliferation of these cells, suggesting a possible role of type V collagen in mediating the progenitor cell niche. When the knockout of type V collagen was induced in post-weaning mice after the start of physiologic TMJ loading, the hyaline layer exhibited pronounced thinning, supporting an interplay between type V collagen and occlusal loading in condylar cartilage growth. The phenotype in hyaline layer can thus be attributed to the impact of type V collagen on the mechanically regulated progenitor cell activities. In contrast, knee cartilage does not contain the progenitor cell population at post-natal stages, and develops normal structure and biomechanical properties with the loss of type V collagen. Therefore, in the TMJ, in addition to its established role in regulating the assembly of collagen I fibrils, type V collagen also impacts the mechanoregulation of progenitor cell activities in the fibrous layer. We expect such knowledge to establish a foundation for understanding condylar cartilage matrix development and regeneration, and to yield new insights into the TMJ symptoms in patients with classic Ehlers-Danlos syndrome, a genetic disease due to autosomal mutation of type V collagen.
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Affiliation(s)
- Prashant Chandrasekaran
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
| | - Bryan Kwok
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
| | - Biao Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
| | - Sheila M Adams
- Department of Molecular Pharmacology and Physiology, Morsani School of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Chao Wang
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
| | - Daphney R Chery
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States
| | - Robert L Mauck
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States; Translational Musculoskeletal Research Center, Corporal Michael J. Crescenz Veterans Administration Medical Center, Philadelphia, PA 19104, United States
| | - Nathaniel A Dyment
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - X Lucas Lu
- Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, United States
| | - David B Frank
- Penn-CHOP Lung Biology Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States; Penn Cardiovascular Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States; Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, United States
| | - Eiki Koyama
- Translational Research Program in Pediatric Orthopaedics, Division of Orthopaedic Surgery, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, United States
| | - David E Birk
- Department of Molecular Pharmacology and Physiology, Morsani School of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, United States.
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12
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Zhou P, Wei B, Guan J, Chen Y, Zhu Y, Ye Y, Meng Y, Guan J, Mao Y. Mechanical Stimulation and Diameter of Fiber Scaffolds Affect the Differentiation of Rabbit Annulus Fibrous Stem Cells. Tissue Eng Regen Med 2021; 18:49-60. [PMID: 33145743 PMCID: PMC7862471 DOI: 10.1007/s13770-020-00305-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/12/2020] [Accepted: 09/20/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Degeneration of the annulus fibrosus (AF), an important structure of the intervertebral disc, is one of the main causes of degenerative disc disease. Fabrication of scaffolds replicating the stratified microstructure of the AF is critical for the successful regeneration of AF. METHODS In this study, we cultured rabbit AF-derived stem cells (AFSCs) using fabricated electrospun fibrous poly-L-lactic acid scaffolds with different diameters. We applied cyclic tensile strain (CTS) on the scaffolds to regulate the differentiation of AFSCs into specific cell types that resided at the inner, middle, and outer zones of the AF. RESULTS We found that the morphologies of AFSCs on the smaller-fiber-diameter scaffolds were nearly round, whereas spindle-like cells morphologies were observed on large-diameter scaffolds. CTS enhanced these phenomena and made the cells slender. The expression levels of collagen-I in cells increased as a function of the fiber diameter, whereas collagen-II and aggrecan exhibited opposite trends. Moreover, the application of CTS upregulated the gene expressions of collagen-I, collagen-II, and aggrecan. CONCLUSION Overlaying the scaffolds with different CTS-stimulated cells could eventually lead to engineered AF tissues with hierarchical structures that approximated the native AF tissue. Thus, the proposed methodologies could be potentially applied for AF regeneration.
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Affiliation(s)
- Pinghui Zhou
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China
- Anhui Province Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, 233030, China
| | - Bangguo Wei
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China
- Anhui Province Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, 233030, China
| | - Jingjing Guan
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China
| | - Yu Chen
- Anhui Province Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, 233030, China
- School of Life Sciences, Bengbu Medical College, Bengbu, 233030, China
- Department of Plastic Surgery, the First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, China
| | - Yansong Zhu
- School of Life Sciences, Bengbu Medical College, Bengbu, 233030, China
| | - Yuchen Ye
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China
| | - Yue Meng
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China
| | - Jianzhong Guan
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China.
- Anhui Province Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, 233030, China.
| | - Yingji Mao
- Department of Orthopedics, First Affiliated Hospital, Bengbu Medical College, Bengbu, 233004, China.
- Anhui Province Key Laboratory of Tissue Transplantation, Bengbu Medical College, Bengbu, 233030, China.
- School of Life Sciences, Bengbu Medical College, Bengbu, 233030, China.
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13
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Gong C, Wen J, Wang H, Li H. Study of changes in rat mandibular condyle under intermittent cyclic and continuous compressive stress. Arch Oral Biol 2021; 124:105066. [PMID: 33571732 DOI: 10.1016/j.archoralbio.2021.105066] [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: 09/03/2020] [Revised: 01/24/2021] [Accepted: 01/25/2021] [Indexed: 10/22/2022]
Abstract
OBJECTIVES This study aimed to investigate the effects of intermittent and continuous compressive stress on rat mandibular condyles. DESIGN Ninety rats were randomly divided into 5 groups: non-loading control groups and 1-day intermittent cyclic loading, 3-day intermittent cyclic loading, 7-day intermittent cyclic loading, continuous loading groups. In the loading groups, compressive mechanical stresses were loaded onto the condyles. The rats were euthanized after one, two, or four weeks. Histomorphometric and immunochemical staining of the cartilage and the micro-CT scanning of subchondral bone were investigated. RESULTS Under continuous loading following the first week, cartilage thickness, numbers of chondrocytes, extracellular matrix (Type-II collagen) and proliferation decreased significantly, and there was no apparent repair response after the second and fourth weeks. The cartilage of 1-day and 3-day intermittent cyclic loading groups showed similar pathological changes but better proliferative activity compared with the continuous loading group. The 7-day intermittent loading group had significant recovery after 2 weeks, including the increase of cartilage thickness and the number of chondrocytes, cell swelling and rearranging. However, the remodeling of subchondral bone showed no significant difference between the intermittent and continuous loading stress compared to the control group. CONCLUSIONS Under moderate mechanical stress, the condylar cartilage actively remodeled, whereas the subchondral bone, as supportive rigid structure, was less sensitive to mechanical pressure. The intermittent compressive stress protects the condylar cartilage from excessive damage, which is different from continuous compressive stress. With longer intervals, the cartilage has the potential capability for recovery as the initial state.
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Affiliation(s)
- Cheng Gong
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Juan Wen
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Huijuan Wang
- Department of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China
| | - Huang Li
- Department of Oral Science, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China.
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14
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Almashraqi AA, Halboub ES, Al-Maweri SA, Barngkgei I, Al-Wesabi MA, Al-Kamel A, Alhammadi MS, Alamir AH. Cone beam computed tomography findings in temporomandibular joint of chronic qat chewers: Dimensional and osteoarthritic changes. J Oral Rehabil 2020; 47:1538-1549. [PMID: 32955738 DOI: 10.1111/joor.13092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/19/2020] [Accepted: 09/06/2020] [Indexed: 12/11/2022]
Abstract
The social habit of chewing qat (also known as khat) is widely practised in East Africa and the Arabian Peninsula. It has been linked with various oro-facial conditions, including temporomandibular joint disorders (TMD). This cross-sectional, comparative study sought to investigate the effects of qat chewing on temporomandibular joint (TMJ), using cone beam computed tomography (CBCT). A total of 85 Yemeni males were included. The participants were divided into two groups: Qat chewers (QC; n = 41) and non-qat chewers (NQC; n = 44). Relevant data were obtained using a structured questionnaire and standardised clinical examination. Additionally, CBCT images of the TMJs were obtained, and then, osteoarthritic changes and TMJ dimensions were analysed. SPSS 21 was used for statistical analyses, with a significant level was set at 0.05. Compared to NQC, a significantly higher proportion of QC presented with clinical signs of TMDs. The qualitative CBCT findings revealed significantly higher osteoarthritic changes in QC than in NQC: osteophyte (51.2% vs 22.7%; P = .008), subcortical sclerosis (48.8% vs 27.3%; P = .047), articular surface flattening (46.3% vs 6.8%; P = .009) and subcortical cysts (43.9% vs 4.5%; P < .001). However, CBCT quantitative findings (condylar dimensions) did not show significant differences between the two groups. The chewing side of the QC group showed slightly more changes compared to the non-chewing side. The results demonstrate that qat chewing has detrimental effects on TMJ manifested mainly as osteoarthritic changes. Further large-scale studies are recommended.
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Affiliation(s)
- Abeer A Almashraqi
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.,Department of Oral Radiology, Faculty of Dentistry, Ibb University, Ibb, Republic of Yemen
| | - Esam S Halboub
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.,Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana'a University, Yemen
| | - Sadeq A Al-Maweri
- Department of Oral Medicine, Oral Pathology and Oral Radiology, Faculty of Dentistry, Sana'a University, Yemen.,Department of Oral Medicine and Diagnostic Sciences, AlFarabi Colleges for Dentistry and Nursing, Riyadh, Saudi Arabia
| | - Imad Barngkgei
- Department of Oral Medicine, Faculty of Dentistry, Al-Wataniya Private University, Hama, Syria
| | - Mohammed A Al-Wesabi
- Department of Preventive and Biomedical Science, Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
| | - Ahlam Al-Kamel
- Department of Preventive and Biomedical Science, Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
| | - Maged S Alhammadi
- Department of Preventive Dental Sciences, Division of Orthodontics and Dentofacial Orthopedics, College of Dentistry, Jazan University, Jazan, Saudi Arabia.,Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Ibb University, Ibb, Republic of Yemen
| | - Abdulwahab H Alamir
- Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
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15
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Stojić V, Glišić B, Djukić L, Prokić B, Janović A, Stamenković Z, Milutinović-Smiljanić S, Danilović V, Brković B, Roganović J. Mandibular lateral deviation induces alteration in vascular endothelial growth factor expression and oxidative stress/nitric oxide generation in rat condyle, synovial membrane and masseter muscle. Arch Oral Biol 2019; 110:104599. [PMID: 31734543 DOI: 10.1016/j.archoralbio.2019.104599] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/25/2019] [Accepted: 10/30/2019] [Indexed: 11/17/2022]
Abstract
OBJECTIVE We aimed to investigate alteration in cellular signaling mediated by vascular endothelial growth factor (VEGF) and parameters of oxidative stress/nitric oxide generation, superoxide dismutase (SOD) and neuronal nitric oxide synthase (nNOS), underlying altered functional mechanical loading of TMJ (temporomandibular joint) during lateral mandibular deviation. DESIGN Thirty-eight 5-week-old male Wistar rats were divided into experimental group, which received acrylic resin appliance that shifted mandible to the left during closure, and control group. Computed tomography and histomorphometry were used for condyle analyses, while samples of condyle, synovial membrane and m. masseter were analyzed with enzyme-linked immunosorbent assay and spectrophotometry to determine VEGF and nNOS protein concentrations, and SOD activity. RESULTS Experimental group of rats developed smaller and asymmetrical mandibles. Less of new bone and cartilage formation and larger bone marrow cavities area were found in the experimental group. Higher VEGF expression in condyle and m. masseter as well as higher nNOS expression in m. masseter and synovial membrane were found in the experimental compared to the control group. Alteration of SOD activity was found in m. masseter and synovial membrane in the experimental group. CONCLUSIONS Lateral mandibular deviation induces mandibular and condylar morphological changes as well as significant cellular signaling alterations in condyle, synovial membrane and masticatory muscle. Cellular VEGF protein overexpression and oxidative stress/nitric oxide disbalance could be the mechanisms underlying unbalanced functional TMJ loading due to mandibular deviation.
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Affiliation(s)
- Vanja Stojić
- Department of Orthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Branislav Glišić
- Department of Orthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Ljiljana Djukić
- Department of Pharmacology in Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Bogomir Prokić
- Department for Surgery, Orthopedics and Ophtalmology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Aleksa Janović
- Department of Diagnostic Radiology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Zorana Stamenković
- Department of Orthodontics, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Vesna Danilović
- Department of Histology, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Božidar Brković
- Department of Oral surgery, School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - Jelena Roganović
- Department of Pharmacology in Dentistry, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.
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16
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Stoustrup P, Pedersen TK, Nørholt SE, Resnick CM, Abramowicz S. Interdisciplinary Management of Dentofacial Deformity in Juvenile Idiopathic Arthritis. Oral Maxillofac Surg Clin North Am 2019; 32:117-134. [PMID: 31699581 DOI: 10.1016/j.coms.2019.09.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Temporomandibular joint (TMJ) arthritis impacts mandibular growth and development. This can result in skeletal deformity, such as facial asymmetry and/or malocclusion asymmetry. This article reviews the unique properties of TMJ and dentofacial growth and development in the setting of juvenile idiopathic arthritis (JIA). Specific orthopedic/orthodontic and surgical management of children with JIA and TMJ arthritis is discussed. The importance of interdisciplinary collaboration is highlighted.
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Affiliation(s)
- Peter Stoustrup
- Section of Orthodontics, Aarhus University, Vennelyst Boulevard 9-11, 8000 Aarhus C, Denmark
| | - Thomas Klit Pedersen
- Section of Orthodontics, Aarhus University, Vennelyst Boulevard 9-11, 8000 Aarhus C, Denmark; Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark
| | - Sven Erik Nørholt
- Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Palle Juul-Jensens Boulevard 165, 8200 Aarhus N, Denmark; Section of Oral Maxillofacial Surgery, Aarhus University, Vennelyst Boulevard 9-11, 8000 Aarhus, Denmark
| | - Cory M Resnick
- Department of Plastic and Oral Surgery, Boston Children's Hospital, 300 longwood Avenue, Boston, MA 02115, USA; Oral and Maxillofacial Surgery, Harvard School of Dental Medicine, Harvard Medical School, Boston, MA, USA
| | - Shelly Abramowicz
- Department of Surgery, Division of Oral and Maxillofacial Surgery, Emory University School of Medicine, Children's Healthcare of Atlanta, Emory University, 1365 Clifton Road, Building B, Suite 2300, Atlanta, GA 30322, USA.
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17
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Alvarez C, Monasterio G, Cavalla F, Córdova LA, Hernández M, Heymann D, Garlet GP, Sorsa T, Pärnänen P, Lee HM, Golub LM, Vernal R, Kantarci A. Osteoimmunology of Oral and Maxillofacial Diseases: Translational Applications Based on Biological Mechanisms. Front Immunol 2019; 10:1664. [PMID: 31379856 PMCID: PMC6657671 DOI: 10.3389/fimmu.2019.01664] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 07/03/2019] [Indexed: 12/23/2022] Open
Abstract
The maxillofacial skeleton is highly dynamic and requires a constant equilibrium between the bone resorption and bone formation. The field of osteoimmunology explores the interactions between bone metabolism and the immune response, providing a context to study the complex cellular and molecular networks involved in oro-maxillofacial osteolytic diseases. In this review, we present a framework for understanding the potential mechanisms underlying the immuno-pathobiology in etiologically-diverse diseases that affect the oral and maxillofacial region and share bone destruction as their common clinical outcome. These otherwise different pathologies share similar inflammatory pathways mediated by central cellular players, such as macrophages, T and B cells, that promote the differentiation and activation of osteoclasts, ineffective or insufficient bone apposition by osteoblasts, and the continuous production of osteoclastogenic signals by immune and local stromal cells. We also present the potential translational applications of this knowledge based on the biological mechanisms involved in the inflammation-induced bone destruction. Such applications can be the development of immune-based therapies that promote bone healing/regeneration, the identification of host-derived inflammatory/collagenolytic biomarkers as diagnostics tools, the assessment of links between oral and systemic diseases; and the characterization of genetic polymorphisms in immune or bone-related genes that will help diagnosis of susceptible individuals.
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Affiliation(s)
- Carla Alvarez
- Forsyth Institute, Cambridge, MA, United States.,Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Gustavo Monasterio
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Franco Cavalla
- Department of Conservative Dentistry, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Luis A Córdova
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, San Jose's Hospital and Clínica Las Condes, Universidad de Chile, Santiago, Chile
| | - Marcela Hernández
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Dominique Heymann
- INSERM, UMR 1232, LabCT, CRCINA, Institut de Cancérologie de l'Ouest, Université de Nantes, Université d'Angers, Saint-Herblain, France
| | - Gustavo P Garlet
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Timo Sorsa
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki University Hospital, Helsinki, Finland.,Department of Oral Diseases, Karolinska Institutet, Stockholm, Sweden
| | - Pirjo Pärnänen
- Department of Oral and Maxillofacial Diseases, University of Helsinki, Helsinki University Hospital, Helsinki, Finland
| | - Hsi-Ming Lee
- Department of Oral Biology and Pathology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, United States
| | - Lorne M Golub
- Department of Oral Biology and Pathology, School of Dental Medicine, Stony Brook University, Stony Brook, NY, United States
| | - Rolando Vernal
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Dentistry Unit, Faculty of Health Sciences, Universidad Autónoma de Chile, Santiago, Chile
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18
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Lei J, Yap AUJ, Liu MQ, Fu KY. Condylar repair and regeneration in adolescents/young adults with early-stage degenerative temporomandibular joint disease: A randomised controlled study. J Oral Rehabil 2019; 46:704-714. [PMID: 31009097 DOI: 10.1111/joor.12805] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 03/08/2019] [Accepted: 04/10/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Anterior repositioning splint (ARS) can facilitate regenerative condylar remodelling. OBJECTIVE To determine the effect of ARS on osseous condylar changes in adolescents/young adults with early-stage degenerative joint disease (DJD). METHODS Sixty-nine patients with early-stage temporomandibular joint (TMJ) DJD based on the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) and cone beam computed tomography (CBCT) imaging were recruited and randomly allocated to two treatment groups: (a) conservative therapy with ARS and (b) conservative therapy without ARS. Subjects with acute TMJ closed-lock had their displaced discs physically reduced by mandibular manipulation prior to ARS therapy. Clinical and CBCT data of 59 patients (86.4% females, mean age 17.95 ± 4.53 years, 67 joints) were attained pre- and at 6 or 12 months post-treatment. Osseous changes after treatment were categorised into (a) progressed, (b) unchanged, (c) repaired (remodelled without new bone formation) and (d) regenerated (remodelled with new bone formation). Statistical analysis including chi-square test, independent samples t test or Mann-Whitney U test was conducted. RESULTS About 85.5% of patients (59/69) completed the study, with 28 subjects (32 joints) in the splint group and 31 (35 joints) in the control group. The occurrence of condylar repair and regeneration was significantly higher with ARS (78.1%/[25/32] of joints) when compared to control group (48.6%/[17/35]) (P < 0.05). Moreover, condylar regeneration was exclusively observed in 50%/(16/32) of joints with ARS. For the 14 joints in splint group that received physical TMJ closed-lock reduction, 85.7%/(12/14) exhibited condylar regeneration. The splint group (3.1%/[1/32]) also had significantly lower incidence of progressive TMJ degeneration than the control (37.1%/[13/35]) (P < 0.001). CONCLUSION Condylar repair and regeneration in early-stage TMJ DJD are possible, and ideal spatial disc-condyle relationship appears important. The possibility of restoring TMJ form/structure by ARS therapy presents an attractive area of new basic science and clinical research (Bone defect repair in early osteoarthrosis of temporomandibular joint by joint distraction therapy: A randomized controlled trial/ChiCTR-TRC-14005172).
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Affiliation(s)
- Jie Lei
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Adrian U-J Yap
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Dentistry, Ng Teng Fong General Hospital, National University Health System, Singapore City, Singapore.,Faculty of Dentistry, National University of Singapore, Singapore City, Singapore
| | - Mu-Qing Liu
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Kai-Yuan Fu
- Center for TMD & Orofacial Pain, Peking University School & Hospital of Stomatology, Beijing, China.,Department of Oral & Maxillofacial Radiology, Peking University School & Hospital of Stomatology, Beijing, China.,National Clinical Research Center for Oral Diseases, Beijing, China.,National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China.,Beijing Key Laboratory of Digital Stomatology, Beijing, China
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Morohoshi T, Ishii T, Ishikawa M, Choi D, Ariizumi D, Morikawa T, Sueishi K. Micro-CT Analysis of Morphological Changes in Mandibles of Growing Rats with Unilateral Occlusal Elevation. Open Dent J 2019. [DOI: 10.2174/1874210601913010150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objectives:
This study investigated the effect of unilateral occlusal elevation in the molar region on facial and mandibular development in growing rats.
Materials and Methods:
Thirty 5-week-old male Wistar rats were randomly allocated to three groups (n = 10). The control group was allowed to develop naturally until 9 weeks of age. A device fitted on the caused unilateral occlusal elevation at 5 weeks in the removal group. The device was removed at 7 weeks and the rats were observed until 9 weeks. In the continuation group, the same device fitted on the left-side molars caused unilateral occlusal elevation continuously for 9 weeks. All groups underwent craniofacial scanning with three-dimensional micro-computed tomography at 5, 7, and 9 weeks.
Results:
In the removal and continuation groups, the mandible was displaced to the unelevated side. At 7 weeks, both these groups showed greater skeletal growth and molar extrusion on the elevated side, with significant differences between the elevated and unelevated sides. At 9 weeks, there were significant differences in both skeletal and alveolar growth between these groups; the asymmetry ameliorated in the removal group.
Limitations:
We evaluated three-dimensional morphometry by fitting a device to rat molars for a short observation period; thus, future studies are warranted to acquire data following long-term observation.
Conclusion:
Unilateral occlusal elevation during the growth period suppressed molar eruption and extrusion on the elevated and unelevated sides, respectively. The height of the mandibular ramus increased on the elevated side, resulting in asymmetric growth.
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Biomechanically stimulated chondrocytes promote osteoclastic bone resorption in the mandibular condyle. Arch Oral Biol 2019; 98:248-257. [DOI: 10.1016/j.archoralbio.2018.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/22/2018] [Accepted: 12/02/2018] [Indexed: 11/20/2022]
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MMP-3 and MMP-8 in rat mandibular condylar cartilage associated with dietary loading, estrogen level, and aging. Arch Oral Biol 2018; 97:238-244. [PMID: 30412863 DOI: 10.1016/j.archoralbio.2018.10.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 10/02/2018] [Accepted: 10/30/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVES The structure of the mandibular condylar cartilage (MCC) is regulated by dynamic and multifactorial processes. The aim of this study was to examine the effects of altered dietary loading, estrogen level, and aging on the structure of the condylar cartilage and the expressions of matrix metalloproteinase (MMP) -3 and MMP-8 of rat MCC. METHODS In this study, Crl:CD (SD) female rats were randomly divided into 3 groups according to dietary hardness: hard diet (diet board), normal diet (pellet), and soft diet (powder). In each group, the rats were further divided into 2 subgroups by ovariectomy at the age of 7 weeks. The rats were sacrificed at 5- and 14-month-old. Histomorphometric analysis of the MCC thickness was performed after toluidine blue staining. Immunochemical staining was done for MMP-3 and MMP-8. A linear mixed model was used to assess the effects of dietary loading, estrogen level, and aging. RESULTS Increased dietary loading was the main factor to increase the MMP-3 expression and the anterior and central thickness of the MCC. Lack of estrogen was the main factor associated with decreased MMP-8. Aging was associated with the thickness changes of the whole condylar cartilage and the reduced expression of MMP-8. CONCLUSION The condylar cartilage structure and metabolism of the female rats are sensitive to dietary loading changes, estrogen level as well as aging. The proper balance of these factors seems to be essential for the maintenance of the condylar cartilage.
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Yu J, Liang F, Huang H, Pirttiniemi P, Yu D. Effects of loading on chondrocyte hypoxia, HIF-1α and VEGF in the mandibular condylar cartilage of young rats. Orthod Craniofac Res 2017; 21:41-47. [PMID: 29271061 DOI: 10.1111/ocr.12212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2017] [Indexed: 12/19/2022]
Abstract
OBJECTIVES To investigate hypoxia-inducible factor 1-alpha (HIF-1α) and vascular endothelial growth factor (VEGF) expression under altered loading, and to explore the relationship between loading and hypoxia in the mandibular condylar cartilage of young rats. SETTING AND SAMPLE POPULATION Eighty Sprague-Dawley rats. MATERIAL AND METHODS The reduced loading group was fed soft food, and their incisors were cut to avoid occlusal contact. The increased loading group was fed hard food and had forced jaw-opening. Ten rats from each group (n = 10) were sacrificed at 12, 24, 48, and 96 hours after initiation of the experiment. Pimonidazole hydrochloride (Hypoxyprobe-1, HP-1) was used as a hypoxia marker to confirm the hypoxic state. Hypoxic chondrocytes as indicated by HP-1, HIF-1α and VEGF protein expressions were recognized by immunohistochemical detection. HIF-1α and VEGF mRNA expressions were detected by semi-quantitative RT-PCR. RESULTS Hypoxyprobe-1 was confined in the upper layers of cartilage, and was most strongly expressed in the weight-bearing area of TMJ at 12 and 96 hours. Staining of HIF-1α and VEGF was most strongly expressed in the chondrocytes of the fibrous and proliferative layer at all time points. Furthermore, expressions were also displayed in the hypertrophic and calcified layers at 48 and 96 hours. The expressions of HIF-1α and VEGF mRNA were higher in the increased loading group than in the reduced loading group at 48 and 96 hours (P < . 05). CONCLUSION Mechanical loading seems to directly induce weight-bearing area hypoxia followed by new vessel formation, which indicates that these factors are related and important for the development of cartilage.
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Affiliation(s)
- J Yu
- Department of Oral Development and Orthodontics, Institute of Dentistry, University of Oulu, Oulu, Finland
| | - F Liang
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Guangxi Medical University, Nanning, China
| | - H Huang
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Guangxi Medical University, Nanning, China
| | - P Pirttiniemi
- Department of Oral Development and Orthodontics, Institute of Dentistry, University of Oulu, Oulu, Finland
| | - D Yu
- Department of Stomatology, First Affiliated Hospital of Guangxi Medical University, Nanning, China
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