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Abd ElMotaleb MA, El-Beialy AR, El-Sharaby FA, ElDakroury AE, Eid AA. Effectiveness of low frequency vibration on the rate of canine retraction: a randomized controlled clinical trial. Sci Rep 2024; 14:7952. [PMID: 38575623 PMCID: PMC10995157 DOI: 10.1038/s41598-024-58268-4] [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: 09/12/2023] [Accepted: 03/27/2024] [Indexed: 04/06/2024] Open
Abstract
To investigate the effectiveness of AcceleDent Aura vibrating device on the rate of canine retraction. Thirty-two patients requiring extraction of upper first premolars and canine retraction were randomly allocated with a 1:1 ratio into either no-appliance group or the AcceleDent Aura appliance group. Canine retraction was done applying 150gm of retraction force using NiTi coil springs on 16 × 22 stainless steel archwires. The duration of the study was 4 months. Models were collected and digitized directly after extraction of upper first premolars and at monthly intervals during canine retraction for recording the monthly as well as the total distance moved by the canine. Digitized models were superimposed on the initial model and data were statistically analyzed. Anchorage loss, rotation, tipping, torque and root condition were evaluated using cone beam computed tomography imaging. Pain was evaluated by visual analog scale. No patients were dropped-out during this study. There was no statistically significant difference between both groups regarding the total distance travelled by the canine (P = 0.436), as well as the rate of canine retraction per month (P = 0.17). Root condition was the same for the two groups. Regarding the pain level, there was no statistically significant difference between the two groups at day 0 (P = 0.721), after 24 h (P = 0.882), after 72 h (P = 0.378) and after 7 days (P = 0.964). AcceleDent Aura was not able to accelerate orthodontic tooth movement. Pain level couldn't be reduced by vibrational force with an AcceleDent device during orthodontic treatment. Root condition was not affected by the vibrational forces.
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Affiliation(s)
| | - Amr Ragab El-Beialy
- Orthodontic Department, Faculty Dentistry, Cairo University, 11 ElSaraya St. Manial, Cairo, Egypt.
| | - Fouad Aly El-Sharaby
- Orthodontic Department, Faculty Dentistry, Cairo University, 11 ElSaraya St. Manial, Cairo, Egypt
| | - Amr Emad ElDakroury
- Orthodontic Department, Faculty Dentistry, Cairo University, 11 ElSaraya St. Manial, Cairo, Egypt
| | - Ahmed Abdelsalam Eid
- Orthodontic Department, Faculty Dentistry, Cairo University, 11 ElSaraya St. Manial, Cairo, Egypt
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2
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Zheng W, Lu X, Chen G, Shen Y, Huang X, Peng J, Wang J, Yin Y, Song W, Xie M, Yu S, Chen L. The osteoclastic activity in apical distal region of molar mesial roots affects orthodontic tooth movement and root resorption in rats. Int J Oral Sci 2024; 16:19. [PMID: 38418457 PMCID: PMC10901898 DOI: 10.1038/s41368-024-00284-1] [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: 06/25/2023] [Accepted: 01/21/2024] [Indexed: 03/01/2024] Open
Abstract
The utilization of optimal orthodontic force is crucial to prevent undesirable side effects and ensure efficient tooth movement during orthodontic treatment. However, the sensitivity of existing detection techniques is not sufficient, and the criteria for evaluating optimal force have not been yet established. Here, by employing 3D finite element analysis methodology, we found that the apical distal region (A-D region) of mesial roots is particularly sensitive to orthodontic force in rats. Tartrate-resistant acidic phosphatase (TRAP)-positive osteoclasts began accumulating in the A-D region under the force of 40 grams (g), leading to alveolar bone resorption and tooth movement. When the force reached 80 g, TRAP-positive osteoclasts started appearing on the root surface in the A-D region. Additionally, micro-computed tomography revealed a significant root resorption at 80 g. Notably, the A-D region was identified as a major contributor to whole root resorption. It was determined that 40 g is the minimum effective force for tooth movement with minimal side effects according to the analysis of tooth movement, inclination, and hyalinization. These findings suggest that the A-D region with its changes on the root surface is an important consideration and sensitive indicator when evaluating orthodontic forces for a rat model. Collectively, our investigations into this region would aid in offering valuable implications for preventing and minimizing root resorption during patients' orthodontic treatment.
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Affiliation(s)
- Wenhao Zheng
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Xiaofeng Lu
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Guangjin Chen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Yufeng Shen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
- Department of Stomatology, The First Affiliated Hospital, School of Medicine, Shihezi University, Shihezi, China
| | - Xiaofei Huang
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Jinfeng Peng
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Jiajia Wang
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Ying Yin
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Wencheng Song
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Mengru Xie
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China
| | - Shaoling Yu
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China.
| | - Lili Chen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan, China.
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Zhang S, Liu J, Feng F, Jia Y, Xu F, Wei Z, Zhang M. Rational design of viscoelastic hydrogels for periodontal ligament remodeling and repair. Acta Biomater 2024; 174:69-90. [PMID: 38101557 DOI: 10.1016/j.actbio.2023.12.017] [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: 08/16/2023] [Revised: 11/14/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
The periodontal ligament (PDL) is a distinctive yet critical connective tissue vital for maintaining the integrity and functionality of tooth-supporting structures. However, PDL repair poses significant challenges due to the complexity of its mechanical microenvironment encompassing hard-soft-hard tissues, with the viscoelastic properties of the PDL being of particular interest. This review delves into the significant role of viscoelastic hydrogels in PDL regeneration, underscoring their utility in simulating biomimetic three-dimensional microenvironments. We review the intricate relationship between PDL and viscoelastic mechanical properties, emphasizing the role of tissue viscoelasticity in maintaining mechanical functionality. Moreover, we summarize the techniques for characterizing PDL's viscoelastic behavior. From a chemical bonding perspective, we explore various crosslinking methods and characteristics of viscoelastic hydrogels, along with engineering strategies to construct viscoelastic cell microenvironments. We present a detailed analysis of the influence of the viscoelastic microenvironment on cellular mechanobiological behavior and fate. Furthermore, we review the applications of diverse viscoelastic hydrogels in PDL repair and address current challenges in the field of viscoelastic tissue repair. Lastly, we propose future directions for the development of innovative hydrogels that will facilitate not only PDL but also systemic ligament tissue repair. STATEMENT OF SIGNIFICANCE.
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Affiliation(s)
- Songbai Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi'an 710032, PR China; The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Jingyi Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Fan Feng
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi'an 710032, PR China
| | - Yuanbo Jia
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Zhao Wei
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China.
| | - Min Zhang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi'an 710032, PR China.
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Chou TM, Agarwal A, Agarwal R. An Immunohistochemical and Histological Study of the Animal Periodontal Ligament During Orthodontic Force Application with Concomitant Application of Electric Current - An Animal Study. Indian J Dent Res 2024; 35:70-75. [PMID: 38934753 DOI: 10.4103/ijdr.ijdr_905_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 11/22/2023] [Indexed: 06/28/2024] Open
Abstract
INTRODUCTION The application of direct current can have a significant impact on the rate of tooth movement and surrounding periodontal ligament collagen turnover. This study aims to provide insight into the optimal characteristics of applied current to achieve enhanced tissue response. METHOD Eighteen male Wistar rats were divided into three groups (I, II, and III). Split mouth design was used, and each side was allocated into an experimental group or control group. Experimental sides of groups I, II, and III received 20, 10, and 15 μA of current (15 min, twice daily for 3 days). Both the experimental and control groups receive an orthodontic force via the NiTi closed coil spring. The amount of tooth movement was determined daily. Immunohistochemistry slides were scored using the immunoreactive scoring (IRS) system for collagen types I and III. One-way Analysis of Variance (ANOVA) and Tukey post hoc test were used to analyse the rate of tooth movement, while Mann-Whitney test was used to analyse IRS distribution between control and experimental groups. RESULTS Compared with the control group, there was a statistically significant difference in tooth movement in all the experimental groups, with group 3 showing the maximum rate on days 2 and 3. This was supported by immunoreactive scores for both collagen types I and III. CONCLUSIONS After 72 hours, the expression of collagen types 1 and 3 increased significantly for group III. This finding was in harmony with the rate of tooth movement, which was maximum for group 3 (15 μA) as compared to other groups.
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Affiliation(s)
- Teh Min Chou
- Department of Orthodontics, Faculty of Dental Sciences, Institute of Medical Sciences, Trauma Centre, Banaras Hindu University, Varanasi, UP, India
| | - Ashish Agarwal
- Department of Orthodontics, Faculty of Dental Sciences, Institute of Medical Sciences, Trauma Centre, Banaras Hindu University, Varanasi, UP, India
| | - Rahul Agarwal
- Department of Oral and Maxillofacial Pathology, Faculty of Dental Sciences, Institute of Medical Sciences, BHU, Varanasi, UP, India
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Akbari A, Gandhi V, Chen J, Turkkahraman H, Yadav S. Vibrational Force on Accelerating Orthodontic Tooth Movement: A Systematic Review and Meta-Analysis. Eur J Dent 2023; 17:951-963. [PMID: 36513343 PMCID: PMC10756730 DOI: 10.1055/s-0042-1758070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
This study aimed to systematically gather and analyze the current level of evidence for the effectiveness of the vibrational force in accelerating orthodontic tooth movement (OTM). This systematic review was conducted using three electronic databases: Scopus, PubMed, and Google Scholar until March 2022. The search was done through the following journals: European Journal of Orthodontics, American Journal of Orthodontics and Dentofacial Orthopedics, The Angle Orthodontist, Progress in Orthodontics, and Seminars in Orthodontics. Human or animal studies that have evaluated the effect of vibrational force on the rate of OTM were selected. A meta-analysis was performed for the rate of canine movement per month. Database research, elimination of duplicate studies, data extraction, and risk of bias assessment were performed by authors independently and in duplication. A fixed and random-effect meta-analysis was performed to evaluate the effect of vibrational forces. A total of 19 studies (6 animal and 13 human studies) that met the inclusion criteria were included. Meta-analysis was performed based on four human clinical trials. Three out of four studies showed no significant difference in the rate of canine movement between vibrational force and control groups. The limitation of this study was the small sample size and significant heterogeneity among the studies. Although vibrational forces have been shown to accelerate OTM in experimental studies, the results are inconsistent in clinical studies. The inability to apply desired peak load to the targeted teeth may be the main factor in inconsistent clinical outcomes.
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Affiliation(s)
- Amin Akbari
- Department of Mechanical and Energy Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States
| | - Vaibhav Gandhi
- Division of Orthodontics, University of Louisville School of Dentistry, Louisville, Kentucky, United States
| | - Jie Chen
- Department of Mechanical and Energy Engineering, Indiana University–Purdue University Indianapolis, Indianapolis, Indiana, United States
| | - Hakan Turkkahraman
- Department of Orthodontics and Oral Facial Genetics, Indiana University School of Dentistry, Indianapolis, Indiana, United States
| | - Sumit Yadav
- Division of Orthodontics, School of Dentistry, University of Connecticut Health, Farmington, Connecticut, United States
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Mehta S, Wang K, Chen PJ, Zhichao F, Ahmida A, Kalajzic Z, Yadav S. How does alendronate affect orthodontic tooth movement in osteogenesis imperfecta: an in vivo study on a mice model. Eur J Orthod 2023; 45:217-223. [PMID: 36772933 DOI: 10.1093/ejo/cjad001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
OBJECTIVES The purpose of this study was to evaluate the effects of alendronate on orthodontic tooth movement (OTM) and bone modelling/remodelling in an osteogenesis imperfecta (OI) mice model. MATERIALS AND METHODS Ten-week-old male and female OI mice (Col1a2oim, n = 32) were divided into four groups: 1. Alendronate male (AM, n = 8), 2. Alendronate female (AF, n = 8), 3. saline male (SM, n = 8), and 4. saline female (SF, n = 8). The mice in all four groups received either Alendronate (0.05 mg/kg) or vehicle (saline 0.05 mg/kg) subcutaneously for 2 weeks prior to the placement of orthodontic spring. A nickel-titanium spring applying 3-5 cN of force was used to perform the OTM for 1 week. After 7 days of OTM, the OI mice were euthanized with CO2 inhalation and microfocus computed tomography and histological analyses were performed. RESULTS AM and AF mice showed a significant decrease (P < 0.05) in the rate of OTM compared with SM and SF mice, respectively. In addition, AM and AF mice showed a significant increase (P < 0.05) in the bone volume fraction (BVF) and tissue density (TD) compared with SM and SF mice. Histological analysis of haematoxylin-eosin staining revealed a hyalinization zone in AM and AF mice compared with SM and SF mice. Furthermore, tartrate-resistant acid phosphatase staining indicated decreased number of osteoclasts in AM and AF mice compared with SM and SF mice. Picrosirius red staining showed, Alendronate treatment led to thick uniform and smooth morphology of collagen fibres as compared with saline group. Similarly, second harmony generation images also revealed thicker collagen fibres at the periodontal ligament (PDL)-cementum entheses and PDL-alveolar bone entheses in AM and AF mice compared with SM and SF mice. CONCLUSIONS Alendronate led to a decrease in the rate of OTM, increase in BVF and TD, decrease in the number of osteoclasts, and smooth and thick collagen fibres compared with saline in both male and female OI mice.
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Affiliation(s)
- Shivam Mehta
- Department of Developmental Sciences/Orthodontics, Marquette University School of Dentistry, Milwaukee, WI, USA
| | - Ke Wang
- Division of Orthodontics, University of Connecticut Health, Farmington, USA
| | - Po-Jung Chen
- Division of Orthodontics, University of Connecticut Health, Farmington, USA
| | - Fan Zhichao
- Department of Immunology, University of Connecticut Health, Farmington, USA
| | - Ahmad Ahmida
- Division of Orthodontics, University of Connecticut Health, Farmington, USA
| | - Zana Kalajzic
- Department of Oral Health and Diagnostic Sciences, University of Connecticut, Farmington, USA
| | - Sumit Yadav
- Division of Orthodontics, University of Connecticut Health, Farmington, USA
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Wu C, Liu X, Zhang H, Zhang Q, Ding S, Jin S, Zheng X, Fu C, Han Q, Shen J, Xu J, Ye N, Jiang F, Wu T. Response of human periodontal ligament to orthodontic force using superb microvascular imaging. Am J Orthod Dentofacial Orthop 2022; 162:e257-e266. [PMID: 36089442 DOI: 10.1016/j.ajodo.2022.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Remodeling of the periodontal ligament (PDL) during orthodontic tooth movement is closely related to the vascularity of the PDL, which has not been thoroughly investigated in humans. This study aimed to measure the width and vascular parameters of human PDL using superb microvascular imaging for the first time. METHODS Patients aged 18-25 years were selected for participation. The intervention was randomly allocated from the maxillary canines to the first molars on both sides using 50 g or 150 g of force. The width and vascular parameters of the PDL were measured using superb microvascular imaging at different time intervals (baseline, 30 minutes, and 1, 3, 7, and 14 days). RESULTS Before the intervention, the width of the PDL ranged from 0.14 to 0.25 mm, and the vascular index ranged from 9.40% to 13.54%. After applying orthodontic forces, the cervical and middle PDL widths increased. The vascular index decreased slightly in 30 minutes, decreased to a minimum value after 1 day, increased to the maximum in 3-7 days, and returned to baseline values in 14 days. The values of other vascular parameters showed similar trends. CONCLUSIONS The width and vascular parameters of the PDL changed slightly after force application, underwent changes in the period of reconstruction for 3-7 days, and eventually returned to baseline in 14 days.
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Affiliation(s)
- Chuan Wu
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Xiaoyu Liu
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Huan Zhang
- Department of Medical Ultrasound, the Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Qunyan Zhang
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Siqi Ding
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Shiyu Jin
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Xiuyun Zheng
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Chunfeng Fu
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Quancheng Han
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Jun Shen
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | - Jianguang Xu
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China
| | | | - Fan Jiang
- Department of Medical Ultrasound, the Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
| | - Tingting Wu
- Department of Orthodontics, School and Hospital of Stomatology, Anhui Medical University, Anhui Provincial Key Laboratory of Oral Diseases, Hefei, Anhui, China.
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Sasaki K, Takeshita N, Fukunaga T, Seiryu M, Sakamoto M, Oyanagi T, Maeda T, Takano-Yamamoto T. Vibration accelerates orthodontic tooth movement by inducing osteoclastogenesis via transforming growth factor-β signalling in osteocytes. Eur J Orthod 2022; 44:698-704. [DOI: 10.1093/ejo/cjac036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Background
We previously found the conditions of supplementary vibration that accelerated tooth movement and induced bone resorption in an experimental rat tooth movement model. However, the molecular biological mechanisms underlying supplementary vibration-induced orthodontic tooth movement are not fully understood. Transforming growth factor (TGF)-β upregulates osteoclastogenesis via induction of the receptor activator of nuclear factor kappa B ligand expression, thus TGF-β is considered an essential cytokine to induce bone resorption.
Objectives
The aim of this study is to examine the role of TGF-β during the acceleration of orthodontic tooth movement by supplementary vibration.
Materials and methods
In experimental tooth movement, 15 g of orthodontic force was loaded onto the maxillary right first molar for 28 days. Supplementary vibration (3 g, 70 Hz) was applied to the maxillary first molar for 3 min on days 0, 7, 14, and 21. TGF-β receptor inhibitor SB431542 was injected into the submucosal palatal and buccal areas of the maxillary first molars once every other day. The co-culture of RAW264.7 cells and MLO-Y4 cells was used as an in vitro osteoclastogenesis model.
Results
SB431542 suppressed the acceleration of tooth movement and the increase in the number of osteoclasts by supplementary vibration in our experimental rat tooth movement model. Immunohistochemical analysis showed supplementary vibration increased the number of TGF-β1-positive osteocytes in the alveolar bone on the compression side during the experimental tooth movement. Moreover, vibration-upregulated TGF-β1 in MLO-Y4 cells induced osteoclastogenesis.
Conclusions
Orthodontic tooth movement was accelerated by supplementary vibration through the promotion of the production of TGF-β1 in osteocytes and subsequent osteoclastogenesis.
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Affiliation(s)
- Kiyo Sasaki
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Nobuo Takeshita
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
- Section of Orthodontics and Dentofacial Orthopedics, Faculty of Dental Science, Kyushu University , Fukuoka, Fukuoka , Japan
| | - Tomohiro Fukunaga
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Masahiro Seiryu
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Mayuri Sakamoto
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Toshihito Oyanagi
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Toshihiro Maeda
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
| | - Teruko Takano-Yamamoto
- Division of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry, Tohoku University , Sendai, Miyagi , Japan
- Department of Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University , Sapporo, Hokkaido , Japan
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Chawla S, Rodrigues L, Deshmukh S, Vajarekar G. The effect of vibrational devices on pain in patients undergoing orthodontic treatment: A systematic review and meta-analysis. JOURNAL OF THE INTERNATIONAL CLINICAL DENTAL RESEARCH ORGANIZATION 2022. [DOI: 10.4103/jicdro.jicdro_99_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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10
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Shcherba V, Krynytska I, Marushchak M, Korda M. Does thyroid dysfunction influence inflammatory mediators in experimental periodontitis? Endocr Regul 2021; 55:131-141. [PMID: 34523300 DOI: 10.2478/enr-2021-0014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Objective. The aim of the present study was to investigate the presence of inflammatory mediators in rats with only periodontitis and periodontitis in a setting of hyper- and hypo-thyroidism and to analyze the correlative linkages between inflammatory mediators and thyroid hormones. Methods. White male 12-14 weeks old inbred rats (n=48) weighing 180-200 g were employed in the experiment. They were randomly divided into the following groups: Group I - control group, Group II - group with a model of periodontitis, Group III - group with a periodontitis in a setting of hyperthyroidism, and Group IV - group with periodontitis in a setting of hypothyroidism. The presence of tumor-necrosis factor-α (TNF-α) and interleukins IL-1β and IL-10 in the periodontal homogenate supernatant was studied by a solid-phase enzyme-linked immunosorbent assay. Results. It was shown that experimental lipopolysaccharide (LPS)-induced periodontitis is accompanied by hyperproduction of pro-inflammatory cytokines (TNF-α, IL-1β) and reduction of anti-inflammatory cytokines (IL-10), whereas TNF-α underwent to maximum changes. Thyroid dysfunction exacerbates cytokine imbalance and severity of inflammation in experimental LPS-induced periodontitis, especially pronounced at hyperthyroidism, as evidenced by the predominance of TNF-α and IL-1β levels in the periodontal homogenate supernatant by 38.5% (р<0.01) and 75.6% (p<0.001), respectively, hyperthyroid over the euthyroid, and by 20.1% (p<0.05) and 24.1% (p<0.05), respectively, over the hypothyroid rats. Conclusions. Thyroid dysfunction, especially hyperthyroidism, may play an important role in the pro-inflammatory response in periodontitis. Hyperproduction of inflammatory mediators in thyroid dysfunction can induce a noticeable damage in the whole apparatus of the periodontium, thereby causing progression of periodontitis.
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Affiliation(s)
- Vitaliy Shcherba
- I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Inna Krynytska
- I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Mariya Marushchak
- I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
| | - Mykhaylo Korda
- I. Horbachevsky Ternopil National Medical University, Ternopil, Ukraine
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11
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Kaplan M, Kalajzic Z, Choi T, Maleeh I, Ricupero CL, Skelton MN, Daily ML, Chen J, Wadhwa S. The role of inhibition of osteocyte apoptosis in mediating orthodontic tooth movement and periodontal remodeling: a pilot study. Prog Orthod 2021; 22:21. [PMID: 34308514 PMCID: PMC8310814 DOI: 10.1186/s40510-021-00366-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/07/2021] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Orthodontic tooth movement (OTM) has been shown to induce osteocyte apoptosis in alveolar bone shortly after force application. However, how osteocyte apoptosis affects orthodontic tooth movement is unknown. The goal of this study was to assess the effect of inhibition of osteocyte apoptosis on osteoclastogenesis, changes in the alveolar bone density, and the magnitude of OTM using a bisphosphonate analog (IG9402), a drug that affects osteocyte and osteoblast apoptosis but does not affect osteoclasts. MATERIAL AND METHODS Two sets of experiments were performed. Experiment 1 was used to specifically evaluate the effect of IG9402 on osteocyte apoptosis in the alveolar bone during 24 h of OTM. For this experiment, twelve mice were divided into two groups: group 1, saline administration + OTM24-h (n=6), and group 2, IG9402 administration + OTM24-h (n=6). The contralateral unloaded sides served as the control. The goal of experiment 2 was to evaluate the role of osteocyte apoptosis on OTM magnitude and osteoclastogenesis 10 days after OTM. Twenty mice were divided into 4 groups: group 1, saline administration without OTM (n=5); group 2, IG9402 administration without OTM (n=5); group 3, saline + OTM10-day (n=6); and group 4, IG9402 + OTM10-day (n=4). For both experiments, tooth movement was achieved using Ultra Light (25g) Sentalloy Closed Coil Springs attached between the first maxillary molar and the central incisor. Linear measurements of tooth movement and alveolar bone density (BVF) were assessed by MicroCT analysis. Cell death (or apoptosis) was assessed by terminal dUTP nick-end labeling (TUNEL) assay, while osteoclast and macrophage formation were assessed by tartrate-resistant acid phosphatase (TRAP) staining and F4/80+ immunostaining. RESULTS We found that IG9402 significantly blocked osteocyte apoptosis in alveolar bone (AB) at 24 h of OTM. At 10 days, IG9402 prevented OTM-induced loss of alveolar bone density and changed the morphology and quality of osteoclasts and macrophages, but did not significantly affect the amount of tooth movement. CONCLUSION Our study demonstrates that osteocyte apoptosis may play a significant role in osteoclast and macrophage formation during OTM, but does not seem to play a role in the magnitude of orthodontic tooth movement.
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Affiliation(s)
- Michele Kaplan
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA.
| | - Zana Kalajzic
- Department of Oral Health and Diagnostic Sciences, Division of Oral Medicine, UConn Health, Farmington, CT, USA
| | - Thomas Choi
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Imad Maleeh
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Christopher L Ricupero
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Michelle N Skelton
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Madeleine L Daily
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Jing Chen
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
| | - Sunil Wadhwa
- Division of Orthodontics, College of Dental Medicine, Columbia University, New York, NY, USA
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12
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Agrawal A, Chou TM. Impact of Vibration on the Levels of Biomarkers: A Systematic Review. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2021. [DOI: 10.1177/03015742211019520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction: The objective of this systematic review is to assess the effect of vibrational force on biomarkers for orthodontic tooth movement. Methods: An electronic search was conducted for relevant studies (up to December 31, 2020) on the following databases: Pubmed, Google scholar, Web of Science, Cochrane Library, Wiley Library, and ProQuest Dissertation Abstracts and Thesis database. Hand searching of selected orthodontic journals was also undertaken. The selected studies were assessed for the risk of bias in Cochrane collaboration risk of bias tool. The “traffic plot” and “weighted plot” risk of bias distribution are designed in the RoB 2 tool. The 2 authors extracted the data and analyzed it. Results: Six studies fulfilled the inclusion criteria. The risks of biases were high for 4, low and some concern for other 2 studies. The biomarkers, medium, device, frequency and duration of device, as well as other data were extracted. The outcomes of the studies were found to be heterogenous. Conclusion: One study showed highly statistically significant levels of IL-1 beta with <.001. Rate of tooth movement was correlated with levels of released biomarkers under the influence of vibrational force in 3 studies, but it was found to be significant only in 1 study. It was further observed that vibration does not have any significant reduction in pain and discomfort.
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Affiliation(s)
- Ashish Agrawal
- Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - TM Chou
- Faculty of Dental Sciences, Institute of Medical Sciences, Banaras Hiindu University, Varanasi, Uttar Pradesh, India
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13
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Three-dimensional imaging and molecular analysis of the effects of photobiomodulation and mechanical vibration on orthodontic retention treatment in rats : Effects of photobiomodulation and mechanical vibration on orthodontic retention treatment. J Orofac Orthop 2021; 83:24-41. [PMID: 34009424 DOI: 10.1007/s00056-021-00296-0] [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: 10/26/2020] [Accepted: 03/15/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE We aimed to evaluate and compare effects of photobiomodulation (PBM) and low-magnitude high-frequency mechanical vibration (HFMV) on orthodontic retention. METHODS Sixty-four female Wistar albino rats were divided into 9 groups (2 negative and positive controls each, 3 PBM and 2 HFMV groups) and studied for 25 days. In the experimental groups, closed nickel-titanium closed coil springs with a 50 cN force were placed for 10 days between the maxillary incisor and molar. PBM and HFMV were applied daily over long- (15 days) and short-term (7 days) retention periods. The PBM groups received PBM with a single wavelength (650 nm) or higher wavelengths (532, 650, 940 nm) for 9 min per day. HFMV groups received HFMV of 10, 20, and 30 Hz for 10 min per day. Right and left maxilla were assessed using micro-computed tomography imaging and real-time polymerase chain reaction. The amount of tooth movement during the retention period, expression levels of cyclooxygenase‑2 (COX-2), osteoprotegerin (OPG), and receptor activator of nuclear factor-kappa B ligand (RANKL) mRNA gene expression levels, OPG/RANKL ratios, alveolar bone trabecular thickness (Tb.Th), trabecular number (Tb.N), and structure model index were analyzed. Kruskal-Wallis and Mann-Whitney U tests were used for multiple comparisons of the nonparametric distributed data and binary comparisons, respectively. RESULTS When using the long-term retention protocol, PBM and HFMV treatment increased Tb.N (p < 0.05) and decreased COX‑2 mRNA gene expression levels (p < 0.05) and Tb.Th (p < 0.05) compared to controls. For short-term retention, PBM and HFMV decreased the amount of relapse tooth movement compared to controls. In addition, Tb.Th (p < 0.05) and the mRNA gene expression levels of COX‑2 and RANKL (p < 0.05) were decreased. CONCLUSION PBM and HFMV might be able to support retention after orthodontic tooth movement by reducing bone resorption and increasing bone quality.
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14
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Pirmoradian M, Safiaghdam H, Nokhbatolfoghahaei H, Ashnagar S, Fekrazad R. Effect of Photobiomodulation on Relapse in an Experimental Rapid Maxillary Expansion Model in Rat. Photochem Photobiol 2020; 97:634-640. [PMID: 33294968 DOI: 10.1111/php.13365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/19/2020] [Accepted: 11/30/2020] [Indexed: 11/27/2022]
Abstract
Rapid maxillary expansion (RME) is performed on transversely deficient maxilla. As all orthodontic treatments, retention is important in maintaining therapeutic outcomes. Fixed /removable retainers are used post-RME causing hygiene and compliance problems. Given photobiomodulation's positive effects on the quantity and quality of bone regeneration, its effect on post-RME relapse was studied. Thirty Sprague Dawley rats were randomly divided into group R, non-irradiated RME-treated (n = 12), group P, irradiated RME-treated (n = 12) and group C, non-RME non-irradiated (n = 6). A 1.5 mm metal ring inserted between maxillary incisors at days 0 and 15 was expanded until 1.5 mm space was obtained at day 30. In group P, Ga-Al-As diode laser (810 nm, 100 mW, 4J/cm2 , 30 secs) was applied on days 0, 2, 4, 6, 8, 10, 12 and 14 as predictor variable. The relapse was measured as the space lost between incisors for 30 days after appliance removal (primary outcome variable) and compared with t-test. In week 2, space loss in group P was significantly lower (P < 0.05) than all other groups. The relapse during weeks 2 and 3 was significantly lower in group P than group R. However, no significant difference in relapse amount was found between groups during first and fourth week. There was a significant difference (P < 0.05) between groups in relapse rates (secondary outcome variable) but not in total relapse after 4 weeks. Photobiomodulation proved beneficial in resisting relapse in our study, and it is suggested to be continued until the end of expansion.
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Affiliation(s)
- Maryam Pirmoradian
- Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.,Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hannaneh Safiaghdam
- Student Research Commitee, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hanieh Nokhbatolfoghahaei
- Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Reza Fekrazad
- Radiation Sciences Research Center, Laser Research Center in Medical Sciences, Aja University of Medical Sciences, Tehran, Iran.,International Network for Photo Medicine and Photo Dynamic Therapy (INPMPDT), Universal Scientific Education and Research Network (USERN), Tehran, Iran
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15
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Kumar V, Batra P, Sharma K, Raghavan S, Srivastava A. Comparative assessment of the rate of orthodontic tooth movement in adolescent patients undergoing treatment by first bicuspid extraction and en mass retraction, associated with low-frequency mechanical vibrations in passive self-ligating and conventional brackets: A randomized controlled trial. Int Orthod 2020; 18:696-705. [PMID: 33162347 DOI: 10.1016/j.ortho.2020.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND Low-frequency vibrations are one of the many non-surgical modalities aimed at increasing the rate of orthodontic tooth movement. OBJECTIVE The present trial was conducted to assess the efficacy of low-frequency vibrations in increasing the rate of orthodontic tooth movement in adolescent patients undergoing fixed mechanotherapy with passive self-ligating brackets and conventional brackets. MATERIALS AND METHODS Setting and sample population: department of orthodontics and dentofacial orthopaedics in a nationally accredited dental college. Participants, study design and methods: 65 patients were randomly allocated to three groups. Two experimental groups consisted of passive self-ligating and conventionally ligated appliances received low-frequency vibrations. The control group did not receive any vibrations. Allocation ratio was 1:1:1.32. Eligibility criteria: adolescent patients with sound and healthy dentition, incisor irregularity<5mm. PRIMARY OUTCOME rate of orthodontic tooth movement in mm/month. Randomization and blinding: computer-generated random allocation sequencing was done and data assessor was blinded. STATISTICS the Q-Q plot and Shapiro-Wilks test judged the normality of the data. The parametric test included ANCOVA and post-hoc analysis. RESULTS No statistically significant enhancement of tooth movement was seen in the experimental groups, when comparison was done with the control group P>0.05. Comparison between the two experimental groups did not reveal any significant difference either. CONCLUSION No statistically significant increase of orthodontic tooth movement was seen with low-frequency vibrations and the mode of ligation did not have any effect in increasing the rate of tooth movement either.
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Affiliation(s)
- Vaibhav Kumar
- Institute of Dental Sciences and Technologies, Department of Orthodontics and Dentofacial Orthopedics, NH-58, Kadarabad, ModiNagar, Ghaziabad UP, India
| | - Puneet Batra
- Institute of Dental Sciences and Technologies, Department of Orthodontics and Dentofacial Orthopedics, NH-58, Kadarabad, ModiNagar, Ghaziabad UP, India
| | - Karan Sharma
- Institute of Dental Sciences and Technologies, Department of Orthodontics and Dentofacial Orthopedics, NH-58, Kadarabad, ModiNagar, Ghaziabad UP, India.
| | - Sreevatsan Raghavan
- Institute of Dental Sciences and Technologies, Department of Orthodontics and Dentofacial Orthopedics, NH-58, Kadarabad, ModiNagar, Ghaziabad UP, India
| | - Amit Srivastava
- Institute of Dental Sciences and Technologies, Department of Orthodontics and Dentofacial Orthopedics, NH-58, Kadarabad, ModiNagar, Ghaziabad UP, India
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16
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Lombardo L, Arreghini A, Huanca Ghislanzoni LT, Siciliani G. Does low-frequency vibration have an effect on aligner treatment? A single-centre, randomized controlled trial. Eur J Orthod 2020; 41:434-443. [PMID: 30423130 DOI: 10.1093/ejo/cjy076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Low-frequency vibrations have been proposed as a means of accelerating tooth movement and reducing orthodontic treatment times. OBJECTIVE To determine any differences in the accuracy of dental movement in patients treated with a low-frequency vibration aligner protocol and/or by reducing the aligner replacement interval with respect to a conventional protocol. DESIGN This trial was designed as a single-centre, randomized controlled clinical trial. METHODS Participants: Patients (aged 27.1 ± 9.0 years) who required orthodontic treatment with aligners. Randomization: Patients were randomly allocated to three arms as determined by a computer-randomization scheme. Group A were assigned a conventional protocol (aligners replaced every 14 days); group B also used a low-frequency vibration device for 20 minutes per day; group C followed the same vibration protocol but replaced their aligners every 7 days. Blinding: The operator who performed the set-up and the one who analysed the data were blinded to the group of the patients. Outcome: Pre- and post-treatment digital models were analysed using VAM software to identify the accuracy/imprecision of dental movements. One-way analysis of variance (P < 0.05) and the Bonferroni post hoc test were used to identify any statistically significant differences between the three arms in terms of the accuracy of tooth movement versus the prescription. RESULTS Numbers analysed: A total of 45 patients (15 for group) were analysed (i.e. 2286 dental movements). Outcome: No statistically significant differences emerged between groups A and C in the upper arch, or among groups A, B, and C in the lower. Group B displayed significantly greater accuracy with respect to group A in upper incisor rotation (P = 0.016), and to group C in vestibulolingual (P = 0.007) and mesiodistal tipping (P = 0.029) of the upper canines, and vestibulolingual tipping of the upper molars (P = 0.0001). Harms: No adverse events or side-effects were registered. CONCLUSIONS Considering all tooth and movement types of the 45 participants, the mean total imprecision was 2.1 ± 0.9 degrees, with respect to a mean prescription of 5.7 ± 2.2 degrees. There was no difference in accuracy between replacing the aligners accompanied by low-frequency vibration every 7 days and replacing them every 14 days without vibration. Moreover, low-frequency vibration seemed to improve the accuracy of a conventional protocol in terms of upper incisor rotation. TRIAL REGISTRATION The German Clinical Trials Register (DRK00015613).
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Affiliation(s)
- Luca Lombardo
- Postgraduate School of Orthodontics, University of Ferrara, Italy
| | - Angela Arreghini
- Postgraduate School of Orthodontics, University of Ferrara, Italy
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17
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Vicente A, Bravo-González LA, Navarro JA, Buendía AJ, Camacho-Alonso F. Effects of diabetes on oxidative stress, periodontal ligament fiber orientation, and matrix metalloproteinase 8 and 9 expressions during orthodontic tooth movement. Clin Oral Investig 2020; 25:1383-1394. [PMID: 32643088 DOI: 10.1007/s00784-020-03446-7] [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] [Received: 03/20/2020] [Accepted: 07/03/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVES To evaluate the influence of diabetes on oxidative stress, periodontal ligament (PDL) orientation, and matrix metalloproteinase (MMP) 8 and 9 expressions during orthodontic tooth movement in a rat model. MATERIALS AND METHODS An orthodontic appliance was placed in 60 Sprague-Dawley rats divided into three groups: normoglycemics (n = 20) and two streptozotocin-induced diabetic groups, one untreated (n = 20) and one insulin-treated (n = 20). At 24, 48, and 72 h and 1 week, rats were sacrificed. At each time point, myeloperoxidase (MPO) and malondialdehyde (MDA) were quantified by spectrophotometry, tooth movement was evaluated by micro-CT analysis, and hematoxylin and eosin staining was used to evaluate PDL fiber orientation and immunohistochemistry staining with semi-quantitative H-score analysis of MMP-8 and MMP-9 was performed.. RESULTS At 24 h, MPO activity was significantly higher in untreated-diabetics than normoglycemics. At 24 and 48 h, the MDA level in untreated-diabetic rats was significantly higher than in normoglycemics and insulin-treated animals. At 72 h and 1 week, PDL fibers were oriented significantly more irregularly in untreated-diabetics than in normoglycemics. At all time points, MMP-8 and MMP-9 expressions were significantly higher in both diabetic groups than in the normoglycemic group. After the second day, tooth movement was significantly greater in untreated-diabetics than in the insulin-treated and normoglycemic groups. CONCLUSIONS Mechanical stress in untreated-diabetic rats produces more inflammatory response, oxidative stress, tooth movement, PDL disorganization, and MMP-8 and MMP-9 expressions than among normoglycemics. Insulin reverses these effects, favoring the reorganization of periodontal ligament. CLINICAL RELEVANCE Our results suggest that the application of orthodontic force in diabetic patients would increase inflammation and delay periodontal restructuring. Insulin would partly reverse this situation although glycemic decompensation episodes may occur. For these reasons, the periods between fixed orthodontic appliance activations should be of sufficient duration to allow adequate tissue recovery.
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Affiliation(s)
- Ascensión Vicente
- Unit of Orthodontics, University Dental Clinic, Faculty of Medicine, University of Murcia, Murcia, Spain
| | | | - J A Navarro
- Department of Histology and Pathological Anatomy, University of Murcia, Murcia, Spain
| | - A J Buendía
- Department of Histology and Pathological Anatomy, University of Murcia, Murcia, Spain
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18
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Omidkhoda M, Radvar M, Azizi M, Dehghani M. Evaluating the Efficacy of a Modified Piezo-Puncture Method on the Rate of Tooth Movement in Orthodontic Patients: A Clinical Study. Turk J Orthod 2020; 33:13-20. [PMID: 32284894 DOI: 10.5152/turkjorthod.2020.19013] [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: 02/05/2019] [Accepted: 10/01/2019] [Indexed: 12/24/2022]
Abstract
Objective Owing to the increasing demand from orthodontic patients for a more rapid treatment, many studies have focused on accelerated tooth movement. Currently, one of the prevalent methods to achieve accelerated tooth movement is piezo-puncture. The aim of the present study was to evaluate the effect of a modified piezo-puncture method on tooth movement rate and type during canine retraction. Methods A total of 17 patients who required fixed orthodontic treatment with extraction of the maxillary first premolars were included in the study. Following a split-mouth design, upper canines were retracted with Ni-Ti coil spring that applied 150 g of force on each side (piezo-puncture on one side and contralateral side served as the control). Then, the rates of tooth movement, canine angulation and rotation, and anchorage loss were evaluated at T0 (before the intervention), T1 (1 month after the intervention), and T2 (2 months after the intervention). For calculating the canine movement rate, either the distance between the canine and the lateral incisor or the space between the second premolar and the canine was measured. In addition, pain perception was documented by Visual Analog Scale. Data were analyzed using the Kolmogorov-Smirnov normality test, Spearman correlation test, paired sample t-test, and Wilcoxon signed-rank test. Results No significant acceleration was observed in canine movement, canine tipping, rotation, or anchorage loss of molar in different times. Conclusion Considering the limitations of the study, the application of piezo-puncture employing the protocol used in the present study failed to accelerate tooth movement and to decrease the unfavorable tipping, rotation, and molar anchorage loss.
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Affiliation(s)
- Maryam Omidkhoda
- Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Orthodontics, Mashhad University of Medical Sciences School of Dentistry, Mashhad, Iran
| | - Mehrdad Radvar
- Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Periodontics, Mashhad University of Medical Sciences School of Dentistry, Mashhad, Iran
| | - Majid Azizi
- Department of Orthodontics, Birjand University of Medical Sciences School of Dentistry, Birjand, Iran
| | - Mahboobe Dehghani
- Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Orthodontics, Mashhad University of Medical Sciences School of Dentistry, Mashhad, Iran
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19
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García-López S, Villanueva RE, Massó-Rojas F, Páez-Arenas A, Meikle MC. Micro-vibrations at 30 Hz on bone cells cultivated in vitro produce soluble factors for osteoclast inhibition and osteoblast activity. Arch Oral Biol 2019; 110:104594. [PMID: 31733582 DOI: 10.1016/j.archoralbio.2019.104594] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/13/2019] [Accepted: 10/24/2019] [Indexed: 12/28/2022]
Abstract
OBJETIVE It has been claimed that micro-pulse vibration can accelerate the rate of tooth movement during orthodontic treatment; however, the underlying cellular mechanism has yet to be elucidated. The purpose of this study was to understand the mechanisms underlying tooth movement acceleration by measuring alterations in a panel of intercellular signalling molecules and markers of osteoblast/osteoclast function following micro-pulse vibration for 20 min at 30 Hz. DESIGN Primary BALB/c mouse calvarial osteoblasts were cultivatedin vitro and subjected to micro-pulse vibration (0.25 N; 30 Hz) with the AcceleDent® Aura appliance for 20 min and assayed for IL-4, IL-13, IL-17, OPG, soluble RANKL and TGF-β protein by ELISA; for PCNA in osteoblasts and caspase 3/7 in osteoclasts by immunohistochemistry; for IL-4, IL-13, and Il-17 in osteoclasts by ELISA; and for cathepsin K by flow cytometry. RESULTS After micro-pulse vibration, the murine osteoblast culture supernatant showed increased IL-4, IL-13, IL-17, OPG and TGF-β levels and decreased RANKL levels; PCNA in osteoblasts and caspase 3/7 in osteoclasts were also upregulated. The osteoclast culture supernatant had increased levels of IL-4, IL-13 and IL-17, and cathepsin K was upregulated in the treatment group compared with the control group. CONCLUSIONS Micro-pulse vibration promotes the production of soluble factors that inhibit osteoclasts, promote apoptosis and activate osteoblasts in vitro, which could increase bone mineral density. Further studies should be conducted in order to understand the biological mechanism of how micro-vibration might influence tooth movement during orthodontic treatment.
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Affiliation(s)
- Salvador García-López
- Health Science Department/Cell Biology and Immunology Laboratory, Universidad Autónoma Metropolitana-Xochimilco, 04960, Mexico City, Mexico; Orthodontic Department, General Hospital "Dr. Manuel Gea González", UNAM, 14080, Mexico City, Mexico; Universidad Intercontinental, Mexico City, Mexico.
| | - Rosina E Villanueva
- School of Dentistry, Universidad Autónoma Metropolitana, 04960, Mexico City, Mexico.
| | - Felipe Massó-Rojas
- Translational Medicine Unit, Instituto Nacional de Cardiología "Ignacio Chávez", 14080, Mexico City, Mexico.
| | - Araceli Páez-Arenas
- Translational Medicine Unit, Instituto Nacional de Cardiología "Ignacio Chávez", 14080, Mexico City, Mexico
| | - Murray C Meikle
- Emeritus Professor King's College, Dental Institute, at Guy's, King's and St. Thomas's Hospital, University of London, SE1 9RT, United Kingdom.
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20
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Li Z, Yu M, Jin S, Wang Y, Luo R, Huo B, Liu D, He D, Zhou Y, Liu Y. Stress Distribution and Collagen Remodeling of Periodontal Ligament During Orthodontic Tooth Movement. Front Pharmacol 2019; 10:1263. [PMID: 31708784 PMCID: PMC6821875 DOI: 10.3389/fphar.2019.01263] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 09/30/2019] [Indexed: 01/11/2023] Open
Abstract
Periodontal ligament (PDL), as a mechanical connection between the alveolar bone and tooth, plays a pivotal role in force-induced orthodontic tooth movement (OTM). However, how mechanical force controls remodeling of PDL collagenous extracellular matrix (ECM) is largely unknown. Here, we aimed to evaluate the stress distribution and ECM fiber remodeling of PDL during the process of OTM. An experimental tooth movement model was built by ligating a coil spring between the left maxillary first molar and the central incisors. After activating the coil spring for 7 days, the distance of tooth movement was 0.324 ± 0.021 mm. The 3D finite element modeling showed that the PDL stress obviously concentrated at cervical margin of five roots and apical area of the mesial root, and the compression region was distributed at whole apical root and cervical margin of the medial side (normal stress < -0.05 MPa). After force induction, the ECM fibers were disordered and immature collagen III fibers significantly increased, especially in the apical region, which corresponds to the stress concentration and compression area. Furthermore, the osteoclasts and interleukin-1β expression were dramatically increased in the apical region of the force group. Taken together, orthodontic loading could change the stress distribution of PDL and induce a disordered arrangement and remodeling of ECM fibers. These findings provide orthodontists both mechanical and biological evidences that root resorption is prone to occur in the apical area during the process of OTM.
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Affiliation(s)
- Zixin Li
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Min Yu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Shanshan Jin
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yu Wang
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Rui Luo
- Biomechanics Lab, Department of Mechanics, School of Aerospace Engineering, Beijing Institute of Technology, Beijing, China
| | - Bo Huo
- Biomechanics Lab, Department of Mechanics, School of Aerospace Engineering, Beijing Institute of Technology, Beijing, China
| | - Dawei Liu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Danqing He
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yanheng Zhou
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
| | - Yan Liu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China
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21
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Park WY, Kim MS, Kim MS, Oh MH, Lee SY, Kim SH, Cho JH. Effects of pre-applied orthodontic force on the regeneration of periodontal tissues in tooth replantation. Korean J Orthod 2019; 49:299-309. [PMID: 31598486 PMCID: PMC6769261 DOI: 10.4041/kjod.2019.49.5.299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 11/29/2022] Open
Abstract
Objective This study aimed to investigate the effect of pre-applied orthodontic force on the regeneration of periodontal ligament (PDL) tissues and the underlying mechanisms in tooth replantation. Methods Orthodontic force (50 cN) was applied to the left maxillary first molars of 7-week-old male Sprague–Dawley rats (n = 32); the right maxillary first molars were left untreated to serve as the control group. After 7 days, the first molars on both sides were fully luxated and were immediately replanted in their original sockets. To verify the effects of the pre-applied orthodontic force, we assessed gene expression by using microarray analysis and real-time reverse transcription polymerase chain reaction (RT-PCR), cell proliferation by using proliferating cell nuclear antigen (PCNA) immunofluorescence staining, and morphological changes by using histological analysis. Results Application of orthodontic force for 7 days led to the proliferation of PDL tissues, as verified on microarray analysis and PCNA staining. Histological analysis after replantation revealed less root resorption, a better arrangement of PDL fibers, and earlier regeneration of periodontal tissues in the experimental group than in the control group. For the key genes involved in periodontal tissue remodeling, including CXCL2, CCL4, CCL7, MMP3, PCNA, OPG, and RUNX2, quantitative RT-PCR confirmed that messenger RNA levels were higher at 1 or 2 weeks in the experimental group. Conclusions These results suggest that the application of orthodontic force prior to tooth replantation enhanced the proliferation and activities of PDL cells and may lead to higher success rates with fewer complications.
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Affiliation(s)
| | - Min Soo Kim
- Department of Statistics, College of Natural Sciences, Chonnam National University, Gwangju, Korea
| | - Min-Seok Kim
- Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju, Korea.,Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Min-Hee Oh
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea
| | - Su-Young Lee
- Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju, Korea.,Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Sun-Hun Kim
- Department of Oral Anatomy, School of Dentistry, Chonnam National University, Gwangju, Korea.,Dental Science Research Institute, Chonnam National University, Gwangju, Korea
| | - Jin-Hyoung Cho
- Department of Orthodontics, School of Dentistry, Chonnam National University, Gwangju, Korea.,Dental 4D Research Institute, Chonnam National University, Gwangju, Korea
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22
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Kannan S, Fassul S, Singh AK, Arora N, Malhotra A, Saini N. Effectiveness and importance of powered tooth brushes in tooth movement. J Family Med Prim Care 2019; 8:2478-2483. [PMID: 31463280 PMCID: PMC6691431 DOI: 10.4103/jfmpc.jfmpc_352_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Introduction: Effectiveness of vibratory stimulus from a commonly available battery-powered tooth brush in accelerating orthodontic tooth movement was tested by a randomized controlled split-mouth study. Materials and Methods: Twenty-three subjects with bimaxillary protrusion, requiring extraction of all first premolars and requiring maximum anchorage, were chosen. After initial leveling and aligning, miniscrews were placed between the first molar and the second premolar in the maxillary right and left quadrants and loaded with 150-g nickel–titanium closed-coil springs for individual canine retraction. Additional 5 min of vibratory stimulus thrice daily was applied on the experimental side. The mean treatment duration was 3 months. Results: There was no significant difference of means of the canine distal movement between the experimental and the control sides (P = 0.70). Conclusion: Application of vibratory stimulus with powered tooth brush during canine retraction was not seen to have an acceleratory effect on orthodontic tooth movement.
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Affiliation(s)
- Sridhar Kannan
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Sajna Fassul
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Ashish Kumar Singh
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Nitin Arora
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Abhita Malhotra
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
| | - Neeraj Saini
- Department of Orthodontics, Manav Rachna Dental College, Faridabad, Haryana, India
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23
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Tantilertanant Y, Niyompanich J, Everts V, Supaphol P, Pavasant P, Sanchavanakit N. Cyclic tensile force-upregulated IL6 increases MMP3 expression by human periodontal ligament cells. Arch Oral Biol 2019; 107:104495. [PMID: 31377584 DOI: 10.1016/j.archoralbio.2019.104495] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/10/2019] [Accepted: 07/22/2019] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Cyclic tensile force (CTF) modulates physiological responses of periodontal ligament (PDL) cells. PDL cells are mechanosensitive and are able to maintain tissue homeostasis; a process mediated by the expression of particular cytokines including interleukin 6 (IL6). It is unknown whether CTF-induced IL6 regulates the expression of MMPs, enzymes needed for tissue remodeling. DESIGN Human PDL cells were subjected to 10% elongation strain of CTF at a frequency of 60 rpm continuously for 6 h. RNA and proteins were extracted and analyzed for IL6 and MMP expression by quantitative real-time PCR and ELISA, respectively. Using a neutralizing anti-IL6 antibody and addition of recombinant human IL6 at concentrations of 0.1, 1, 10 ng.mL-1 were performed to clarify whether CTF-upregulated IL6 increased MMP expression. Inhibitors of intracellular signaling molecules were employed to reveal possible pathway(s) of IL6-induced MMP expression. RESULTS CTF-induced IL6 expression coincided with an increased MMP3 expression. A neutralizing anti-IL6 antibody attenuated the CTF-increased MMP3 expression, whereas stimulating the cells with recombinant human IL6 increased MMP3 expression. Both PI3K and MAPK pathways were essential in the IL6 induced expression of MMP3. CONCLUSION Our findings suggest a role of CTF in the modulation of expression of IL6 and MMP3 and thus in the regulation of homeostasis and remodeling of the periodontal ligament.
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Affiliation(s)
- Yanee Tantilertanant
- Graduate Program in Oral Biology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Jitti Niyompanich
- The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
| | - Vincent Everts
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands
| | - Pitt Supaphol
- The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
| | - Prasit Pavasant
- Department of Anatomy and Center of Excellence for Regenerative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand
| | - Neeracha Sanchavanakit
- Department of Anatomy and Center of Excellence for Regenerative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.
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Pasaoglu Bozkurt A. Effects of mechanical vibration on miniscrew implants and bone: Fem analysis. Int Orthod 2019; 17:38-44. [DOI: 10.1016/j.ortho.2019.01.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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25
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Gudhimella S, Ibrahim AY, Karanth D, Kluemper AM, Westgate PM, Puleo DA, Huja SS. A rodent model using skeletal anchorage and low forces for orthodontic tooth movement. Am J Orthod Dentofacial Orthop 2019; 155:254-263. [PMID: 30712697 DOI: 10.1016/j.ajodo.2018.03.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 03/01/2018] [Accepted: 03/01/2018] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Nonhuman animal models have been used extensively to study orthodontic tooth movement (OTM). However, rodent models have disadvantages, including a reported reduction in bone volume during OTM. The purpose of this study was to determine the viability of a skeletal anchorage and the effect of low force (∼3 cN) on interradicular bone volume during OTM. METHODS Ninety Sprague-Dawley rats were divided into 5 time points. A miniscrew and a nickel titanium coil spring placed a load of 3 cN (experimental) or 0 cN (sham) on the maxillary first molar in a split-mouth design. Displacement of the first molar and bone volume/total volume (BV/TV) in the interradicular region were quantified. RESULTS The success rate of the miniscrew was 98.9% (89 out of 90). Linear and angular tooth movement increased steadily (mean 0.1 mm/wk, 0.48 mm at 40 days). BV/TV was significantly reduced between the tooth movement and non-tooth movement sides in the 3 cN group: by 13%, 23%, 15%, 23%, and 16% at 3, 7, 14, 28, and 40 days, respectively. CONCLUSIONS Our model resulted in efficient OTM without skeletal anchorage failure. BV/TV reduction was lower than in previous reports. This novel validated model is likely to be the basis for future studies.
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Affiliation(s)
- Sudha Gudhimella
- Department of Orthodontics, University of Louisville, Louisville, Ky
| | | | - Divakar Karanth
- Division of Orthodontics, University of Kentucky, Lexington, Ky
| | | | | | - David A Puleo
- School of Engineering, The University of Mississippi, University, Miss
| | - Sarandeep S Huja
- Department of Orthodontics, Medical University of South Carolina, Charleston, SC.
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Siriphan N, Leethanakul C, Thongudomporn U. Effects of two frequencies of vibration on the maxillary canine distalization rate and RANKL and OPG secretion: A randomized controlled trial. Orthod Craniofac Res 2019; 22:131-138. [PMID: 30758896 DOI: 10.1111/ocr.12301] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To investigate the effects of 30 and 60 Hz vibratory stimulus on canine distalization and RANKL and OPG secretion. SETTING AND SAMPLE POPULATION Sixty patients requiring canine distalization at the Orthodontic Clinic, Prince of Songkla University. MATERIALS AND METHODS Patients were randomly assigned to 30 Hz vibration (n = 20), 60 Hz vibration (n = 20), or the control group (n = 20). Modified electric toothbrushes were used to apply vibration to the randomly selected canine for 20 min/day by the investigator combined with 60 cN continuous distalization force from day 1 to day 7. RANKL and OPG were analysed before (T1) and 24 hours (T2), 48 hours (T3) and 7 days (T4) after initiation of distalization. From day 8, vibratory devices were used by the subjects at home. Rate of canine distalization (T1 to 3 months after initiation [T5]) was calculated. Kruskal-Wallis tests were used for multiple comparisons (significance level, 0.05). RESULTS Canine distalization rate was not different between groups (median; 0.82, 0.87, and 0.83 mm/month for 30, 60 Hz, and control group, respectively; P > 0.05). No within- or between-group differences in RANKL and OPG were observed (P > 0.05), except RANKL on the compression side of the control group was significantly higher at T2, T3 and T4 than T1 (P < 0.001). CONCLUSION In the clinic, 30 and 60 Hz vibratory stimulus have no additive effect on rate of canine distalization rate, RANKL and OPG secretion or RANKL/OPG ratio.
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Affiliation(s)
- Natchanon Siriphan
- Faculty of Dentistry, Orthodontic Section, Department of Preventive Dentistry, Prince of Songkla University, Hat Yai, Thailand
| | - Chidchanok Leethanakul
- Faculty of Dentistry, Orthodontic Section, Department of Preventive Dentistry, Prince of Songkla University, Hat Yai, Thailand
| | - Udom Thongudomporn
- Faculty of Dentistry, Orthodontic Section, Department of Preventive Dentistry, Prince of Songkla University, Hat Yai, Thailand
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Yashmin S, Pandey A, Sabir SA. Vibrations in orthodontics: Is it the future? INTERNATIONAL JOURNAL OF ORTHODONTIC REHABILITATION 2019. [DOI: 10.4103/ijor.ijor_24_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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28
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Aljabaa A, Almoammar K, Aldrees A, Huang G. Effects of vibrational devices on orthodontic tooth movement: A systematic review. Am J Orthod Dentofacial Orthop 2018; 154:768-779. [DOI: 10.1016/j.ajodo.2018.07.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Revised: 07/01/2018] [Accepted: 07/01/2018] [Indexed: 12/31/2022]
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Wang H, Feng C, Jin Y, Tan W, Wei F. Identification and characterization of circular RNAs involved in mechanical force-induced periodontal ligament stem cells. J Cell Physiol 2018; 234:10166-10177. [PMID: 30422310 DOI: 10.1002/jcp.27686] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 10/09/2018] [Indexed: 12/11/2022]
Abstract
Circular RNAs (circRNAs) play critical roles in signal transduction during cell proliferation, differentiation, and apoptosis in a posttranscriptional manner. Recently, circRNAs have been proved to be a large class of animal RNAs with regulatory potency. However, whether circRNAs can respond to mechanical force (MF) and impact on human periodontal ligament stem cells (PDLSCs) and the orthodontic tooth movement (OTM) process remain unknown. Here, we investigated the circRNAs expression patterns in PDLSCs induced by MF and found that circRNAs were responsive to the MF in PDLSCs. Through the valid reads' distribution analysis, we found that the majority of reads in both the control PDLSCs and the MF-induced PDLSCs were distributed in exons. Then we analyzed Gene Ontology terms of genes that overlap with or are neighbors of the stress-responsive circRNAs and found unique enrichment patterns in biological processes, molecular function, and cellular component of PDLSCs. Next, we predicted the possible functions of circRNAs through circRNAs-miRNAs networks. We found that one circRNA may regulate one or several miRNA/miRNAs and one miRNA may interact with one or multiple circRNA/circRNAs. Importantly, a number of circRNAs were predicted to directly or indirectly regulate miRNAs-mediated osteogenic differentiation in mesenchymal stem cells. For instance, circRNA3140 was highly and widely associated with microRNA-21, which plays a critical role in MF-induced osteogenic differentiation of PDLSCs. Taken together, these findings reveal a previously unrecognized mechanism that MF can induce the expression changes of circRNAs in PDLSCs, which may modulate the OTM process and the alveolar bone remodeling.
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Affiliation(s)
- Hong Wang
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, China.,Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
| | - Cheng Feng
- Jinan Hospital of Traditional Chinese Medicine, Jinan, China
| | - Ye Jin
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, China.,Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
| | - Wanye Tan
- Department of Stomatology, Qilu Hospital, Shandong University, Jinan, China
| | - Fulan Wei
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan, China.,Department of Orthodontics, School of Stomatology, Shandong University, Jinan, China
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30
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The effect of compressive force combined with mechanical vibration on human alveolar bone osteoblasts. J Oral Biol Craniofac Res 2018; 9:81-85. [PMID: 30997326 DOI: 10.1016/j.jobcr.2018.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 10/15/2018] [Indexed: 12/23/2022] Open
Abstract
Objective This study aimed to investigate the effects of compressive force combined with mechanical vibration on the expression of pro-inflammatory cytokines that promote osteoclastogenesis and related to orthodontic tooth movement acceleration in human alveolar bone osteoblasts in vitro. Methods Osteoblasts were subjected to compressive force (C), mechanical vibration (V), compressive force combined with mechanical vibration (CV), or no force as a control for 12, 24 and 48 h. Interleukin-1 beta (IL-1β), interleukin-6 (IL-6), receptor activator of nuclear factor kappa-Β ligand (RANKL) and osteoprotegerin (OPG) mRNA and protein expression were assessed using quantitative real-time polymerase chain reaction and enzyme-linked immunosorbent assays. Results In C and CV groups, IL-1β and IL-6 mRNA and protein expression were significantly higher and OPG mRNA and protein expression were significantly lower than control and V groups. However, the expressions were not different between C and CV groups. RANKL mRNA and protein expression were not different between any groups. While, OPG mRNA and protein expression in V group were significantly higher than control group. Conclusions Vibration neither enhanced nor inhibited the expression of IL-1β, IL-6, RANKL and OPG in compressed human alveolar bone osteoblasts.
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Leethanakul C, Phusuntornsakul P, Pravitharangul A. Vibratory stimulus and accelerated tooth movement: A critical appraisal. J World Fed Orthod 2018. [DOI: 10.1016/j.ejwf.2018.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Judex S, Pongkitwitoon S. Differential Efficacy of 2 Vibrating Orthodontic Devices to Alter the Cellular Response in Osteoblasts, Fibroblasts, and Osteoclasts. Dose Response 2018; 16:1559325818792112. [PMID: 30397398 PMCID: PMC6207979 DOI: 10.1177/1559325818792112] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 06/26/2018] [Accepted: 07/03/2018] [Indexed: 12/16/2022] Open
Abstract
Modalities that increase the rate of tooth movement have received considerable attention, but direct comparisons between devices are rare. Here, we contrasted 2 mechanical vibratory devices designed to directly transfer vibrations into alveolar bone as a means to influence bone remodeling. To this end, 3 cells types intimately involved in modulating tooth movements-osteoblasts, periodontal ligament fibroblasts, and osteoclasts-were subjected to in vitro vibrations at bout durations prescribed by the manufacturers. As quantified by an accelerometer, vibration frequency and peak accelerations were 400% and 70% greater in the VPro5 (Propel Orthodontics) than in the AcceleDent (OrthoAccel Technologies) device. Both devices caused increased cell proliferation and gene expression in osteoblasts and fibroblasts, but the response to VPro5 treatment was greater than for the AcceleDent. In contrast, the ability to increase osteoclast activity was device independent. These data present an important first step in determining how specific cell types important for facilitating tooth movement respond to different vibration profiles. The device that engendered a higher vibration frequency and larger acceleration (VPro5) was superior in stimulating osteoblast and fibroblast cell proliferation/gene expression, although the duration of each treatment bout was 75% shorter than for the AcceleDent.
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Affiliation(s)
- Stefan Judex
- Integrative Skeletal Adaptation and Genetics Laboratory, Department of Biomedical Engineering, Stony Brook University, NY, USA
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33
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Phusuntornsakul P, Jitpukdeebodintra S, Pavasant P, Leethanakul C. Vibration enhances PGE 2 , IL-6, and IL-8 expression in compressed hPDL cells via cyclooxygenase pathway. J Periodontol 2018; 89:1131-1141. [PMID: 29761497 DOI: 10.1002/jper.17-0653] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 03/09/2018] [Accepted: 03/11/2018] [Indexed: 01/19/2023]
Abstract
BACKGROUND Although vibration combined with orthodontic force may accelerate orthodontic tooth movement, little is known about the mechanisms that regulate the associated cellular responses. The goal of this study was to investigate whether mechanical vibration combined with compressive force regulates cyclooxygenase (COX)-2/prostaglandin E2 (PGE2 ) and interleukin (IL)-6 and IL-8 messenger RNA (mRNA) and protein expression in human periodontal ligament (hPDL) cells via the COX pathway. METHODS The primary cultured hPDL cells were exposed to mechanical vibration, compressive force or a combination of both mechanical vibration and compressive force at 24, 48, and 72 hours. The COX-2, IL-6, IL-8, receptor activator of nuclear factor kappa-Β ligand (RANKL), and osteoprotegrin (OPG) mRNA expressions were determined using quantitative real-time polymerase chain reaction (qPCR). The PGE2 , IL-6, and IL-8 protein expressions were quantified by enzyme-linked immunosorbent assay (ELISA). To demonstrate whether the expression of PGE2 , IL-6, and IL-8 was in the COX-dependent pathway, the hPDL cells were treated with indomethacin. To determine whether PGE2 stimulated the hPDL cells to express IL-6 and IL-8, exogenous PGE2 was added to the culture media. RESULTS The combination of mechanical vibration and compressive force synergistically upregulated RANKL/OPG, COX-2/PGE2 , IL-6 and IL-8 mRNA, and protein expression. The indomethacin significantly attenuated the increases of PGE2 , IL-6, and IL-8 expression in cells stimulated with compressive force or mechanical vibration combined with compressive force. In addition, exogenous PGE2 increased IL-6 and IL-8 mRNA and protein expressions in hPDL cells. CONCLUSION Mechanical vibration may enhance alveolar bone resorption at the compression side during orthodontic tooth movement via a mechanism involving the cyclooxygenase pathway.
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Affiliation(s)
- Pussadee Phusuntornsakul
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Suwanna Jitpukdeebodintra
- Department of Oral Biology, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Prasit Pavasant
- Department of Anatomy, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Chidchanok Leethanakul
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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Pravitharangul A, Suttapreyasri S, Leethanakul C. Iliac and mandible osteoblasts exhibit varied responses to LMHF vibration. Cell Biol Int 2018; 42:1349-1357. [PMID: 29920835 DOI: 10.1002/cbin.11019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/10/2018] [Indexed: 12/24/2022]
Abstract
The facial and long bones have distinct developmental origins, structures, and cellular compositions. This study aimed to compare the in vitro responses of human mandible and long bone osteoblasts to low-magnitude, high-frequency (LMHF) mechanical vibration in terms of expression of mediators of bone remodeling. Osteoblast-like cell cultures were prepared from iliac crest and mandibular bone specimens from three individuals and cultured in osteogenic induction media. Induction of mature osteoblastic phenotypes was confirmed by analysis of DNA content, alkaline phosphatase activity and gene expression every 3 days for 27 days. Based on gene expression, mature osteoblasts formed by day 15 of induction culture. After 15 days of culture in induction media, mature osteoblasts were subjected to vibration (0, 30, or 60 Hz) for 30 min every 24 h. After 48 h, RANKL, OPG, IL-1β, IL-6 and TGF-β gene, and protein expression were determined by real-time PCR analysis of total cellular mRNA and ELISAs of the cell supernatants. Both iliac and mandible osteoblasts responded to LMHF vibration: IL-1β and RANKL mRNA were downregulated and IL-6 mRNA was upregulated. However, TGF- β mRNA was unaltered and OPG mRNA was upregulated in iliac osteoblasts, whereas both TGF-β and OPG mRNA were downregulated in mandible osteoblasts. As a result, LMHF reduced the RANKL/OPG mRNA ratio in iliac osteoblasts but did not alter the RANKL/OPG mRNA ratio in mandible osteoblasts. This study suggests mature iliac osteoblasts exhibit a more potent anti-resorptive response to vibration, while this tendency was not obviously apparent in mature mandible osteoblasts.
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Affiliation(s)
- Anute Pravitharangul
- Orthodontic Section, Faculty of Dentistry, Department of Preventive Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Srisurang Suttapreyasri
- Faculty of Dentistry, Department of Oral Surgery, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Chidchanok Leethanakul
- Orthodontic Section, Faculty of Dentistry, Department of Preventive Dentistry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
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35
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Uribe F, Dutra E, Chandhoke T. Effect of cyclical forces on orthodontic tooth movement, from animals to humans. Orthod Craniofac Res 2018. [PMID: 28643918 DOI: 10.1111/ocr.12166] [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] [Indexed: 12/23/2022]
Abstract
Vibration as a non-invasive method is currently available for clinical use with the potential to accelerate the rate of tooth movement in orthodontics. The aim of this review was to evaluate the basic science and clinical literature on the effects of vibration on the axial and appendicular skeleton including the craniofacial bone. Vibration as a dynamic load consisting of high oscillatory forces of low magnitude has shown osteogenic and anti-catabolic effects on bone. These effects have been observed in the craniofacial skeleton including the alveolar bone as increases in sutural width and alveolar bone formation. Animal studies have shown conflicting results on vibration when superposed to orthodontic tooth movement. The effects range from increasing to decreasing the rate of tooth movement. Clinical studies in accelerating the rate of tooth movement have similar findings observed in animal studies. High-frequency oscillatory forces of low magnitude are able to affect bone formation and remodelling. These effects of vibration are primarily anabolic and anti-catabolic in bone, including the craniofacial skeleton and alveolar bone. The effect of vibration on accelerating the rate of orthodontic tooth movement is contradictory. Higher levels of evidence studies have not been able to show an acceleratory effect.
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Affiliation(s)
- F Uribe
- Division of Orthodontics, Department of Craniofacial Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT, USA
| | - E Dutra
- Division of Orthodontics, Department of Craniofacial Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT, USA
| | - T Chandhoke
- Division of Orthodontics, Department of Craniofacial Sciences, School of Dental Medicine, University of Connecticut, Farmington, CT, USA
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Effect of supplemental vibration on orthodontic treatment with aligners: A randomized trial. Am J Orthod Dentofacial Orthop 2018; 153:336-346. [PMID: 29501108 DOI: 10.1016/j.ajodo.2017.10.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 10/01/2017] [Accepted: 10/01/2017] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Supplemental vibration has been reported to accelerate orthodontic tooth movement and reduce discomfort. Our purpose was to investigate the effects of AcceleDent on Invisalign treatment. This randomized clinical trial was carried out in 2 orthodontic private practices with a 1:1 allocation ratio. METHODS Adult patients who were beginning their orthodontic treatment were randomly allocated to either an active (A) or a sham (B) AcceleDent Aura device (OrthoAccel Technologies, Inc. Houston, TX). All patients were placed on a 1-week aligner change regimen, and fit was evaluated every 3 weeks. The outcomes were the ability to complete the initial set of aligners and the incisor irregularity measurements for those who completed their regimen of aligners. In addition, aligner compliance, pain levels, and oral health-related quality of life data were gathered from questionnaires. The subjects, investigators, and assessors were all blinded to the treatment arms. RESULTS Twenty-seven subjects were randomized into 2 groups (A and B), 1 subject discontinued treatment, and 13 subjects were analyzed in each group. The Fisher exact test showed no significant difference in completion rates between the 2 groups (group A, 77%; group B, 85%; P = 1). Independent-sample t tests showed no significant difference between the final irregularity index or change in irregularity index between the 2 groups. Compliance was similar in both groups. The Wilcoxon rank sum test showed minimal differences in pain levels. Quality of life responses were similar in both groups. No serious harm was observed. CONCLUSIONS We found no evidence that the AcceleDent Aura device impacts the ability to complete a series of aligners with a 1-week change regimen or the final alignment achieved in adult patients. It also had no significant effect on the reduction of orthodontic pain or oral health-related quality of life parameters when used with Invisalign.
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Swidi AJ, Taylor RW, Tadlock LP, Buschang PH. Recent Advances in Orthodontic Retention Methods: A Review article. J World Fed Orthod 2018. [DOI: 10.1016/j.ejwf.2018.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Effects of local platelet-rich plasma injection on the rate of orthodontic tooth movement in a rat model: A histomorphometric study. Am J Orthod Dentofacial Orthop 2017; 151:92-104. [PMID: 28024792 DOI: 10.1016/j.ajodo.2016.05.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 05/01/2016] [Accepted: 05/01/2016] [Indexed: 02/04/2023]
Abstract
INTRODUCTION The aims of this study were to determine the effects of different concentrations of platelet-rich plasma (PRP) on alveolar bone density and orthodontic tooth movement. METHODS Seventy-six rats were divided into 2 groups: a moderate concentration PRP injection group (n = 38) and a high concentration PRP injection group (n = 38). In each group, 5 time points were studied: 3, 7, 14, 21, and 60 days. Before orthodontic mesialization of the maxillary first molars, moderate and high concentrations of PRP were injected on the right sides of the molar buccal sulcus, and the left sides served as the controls. Tooth movements were measured on 3-dimensional digital models. Alveolar bone volume density and osteoclastic activity in the first molar intraradicular areas were evaluated by histomorphometric analysis. RESULTS Alveolar bone density was decreased in the experimental groups compared with the control groups (P = 0.0001) at 3, 7, 14, and 21 days. On day 3, osteoclastic activity of the experimental groups was higher than that of the controls (P = 0.044, P = 0.0001). On day 21, the amounts of tooth movement in the high-concentration experimental group were 1.7 times greater than in the high-concentration control group and 1.4 times greater than in the moderate-concentration experimental group (P = 0.001). On day 60, alveolar bone density increased to the original levels in all groups. CONCLUSIONS Injection of both moderate and high concentrations of PRP may accelerate orthodontic tooth movement by decreasing alveolar bone density on paradental tissues by enhancing osteoclastic activity in a transient way.
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Yadav S, Dobie T, Assefnia A, Gupta H, Kalajzic Z, Nanda R. Effect of low-frequency mechanical vibration on orthodontic tooth movement. Am J Orthod Dentofacial Orthop 2015; 148:440-9. [PMID: 26321342 DOI: 10.1016/j.ajodo.2015.03.031] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 03/01/2015] [Accepted: 03/01/2015] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Our objective was to investigate the effect of low-frequency mechanical vibration (LFMV) on the rate of tooth movement, bone volume fraction, tissue density, and the integrity of the periodontal ligament. Our null hypothesis was that there would be no difference in the amount of tooth movement between different values of LFMV. METHODS Sixty-four male CD1 mice, 12 weeks old, were used for orthodontic tooth movement. The mice were randomly divided into 2 groups: control groups (baseline; no spring + 5 Hz; no spring + 10 Hz; and no spring + 20 Hz) and experimental groups (spring + no vibration; spring + 5 Hz; spring + 10 Hz; and spring + 20 Hz). In the experimental groups, the first molars were moved mesially for 2 weeks using nickel-titanium coil springs delivering 10 g of force. In the control and experimental groups, LFMV was applied at 5, 10, or 20 Hz. Microfocus x-ray computed tomography analysis was used for tooth movement measurements, bone volume fraction, and tissue density. Additionally, immunostaining for sclerostin, tartrate-resistant acid phosphatase (TRAP) staining, and picrosirius red staining were used on the histologic sections. Simple descriptive statistics were used to summarize the data. Kruskal-Wallis tests were used to compare the outcomes across treatment groups. RESULTS LFMV did not increase the rate of orthodontic tooth movement. Microfocus x-ray computed tomography analysis showed increases in bone volume fractions and tissue densities with applications of LFMV. Sclerostin expression was decreased with 10 and 20 Hz vibrations in both the control and experimental groups. Additionally, the picrosirius staining showed that LFMV helped in maintaining the thickness and integrity of collagen fibers in the periodontal ligament. CONCLUSIONS There was no significant increase in tooth movement by applying LFMV when compared with the control groups (spring + no vibration).
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Affiliation(s)
- Sumit Yadav
- Assistant professor, Division of Orthodontics, Health Center, University of Connecticut, Farmington, Conn.
| | - Thomas Dobie
- Visiting assistant professor, Health Center, University of Connecticut, Farmington, Conn
| | - Amir Assefnia
- Resident, Division of Orthodontics, Health Center, University of Connecticut, Farmington, Conn
| | - Himank Gupta
- Resident, Division of Orthodontics, Health Center, University of Connecticut, Farmington, Conn
| | - Zana Kalajzic
- Research associate, Health Center, University of Connecticut, Farmington, Conn
| | - Ravindra Nanda
- Professor and head, Division of Orthodontics, Health Center, University of Connecticut, Farmington, Conn
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Lu J, Duan Y, Zhang M, Wu M, Wang Y. Expression of Wnt3a, Wnt10b, β-catenin and DKK1 in periodontium during orthodontic tooth movement in rats. Acta Odontol Scand 2015; 74:217-23. [PMID: 26414930 DOI: 10.3109/00016357.2015.1090011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To investigate the expression of Wnt3a, Wnt10b, β-catenin and DKK1 in the periodontal ligament (PDL) during orthodontic tooth movement (OTM) in rats. MATERIALS AND METHODS Nickel-titanium closed-coil springs were used to deliver an initial 50 g mesial force to the left maxillary first molars in 30 rats. The force was kept constant for 1, 3, 5, 7, 10 and 14 days until the animals were sacrificed. The right maxillary molars without force application served as control. Paraffin-embedded sections of the upper jaws were prepared for histological and immunohistochemical analyses to detect Wnt3a, Wnt10b, β-catenin and DKK1 expression in PDL. RESULTS Wnt3a, Wnt10b, β-catenin and DKK1 were expressed on both the ipsilateral and contralateral sides of PDL in each group. After the application of orthodontic force, the expression of β-catenin and DKK1 was initially increased and then decreased on both sides, with maximal levels of expression at day 7 and day 10, respectively. On the compression side, Wnt3a and Wnt10b levels started to increase at day 5, while on the tension side, these two molecules began to increase at day 1. Furthermore, the expression levels of Wnt3a, Wnt10b, and β-catenin were much stronger on the tension side than on the compression side at any of the observation points, while DKK1 level was much higher on the compression side. CONCLUSION Wnt3a, Wnt10b, β-catenin and DKK1 expression may be related to the periodontal tissue remodeling following the application of an orthodontic force in rats. These observations suggest that the Wnt/β-catenin signaling pathway may play a crucial role in periodontal tissue remodeling during OTM.
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Affiliation(s)
- Juan Lu
- a Department of Orthodontics, School of Stomatology , Harbin Medical University , Harbin , 150001 , PR China
| | - Yingying Duan
- a Department of Orthodontics, School of Stomatology , Harbin Medical University , Harbin , 150001 , PR China
| | - Miaomiao Zhang
- a Department of Orthodontics, School of Stomatology , Harbin Medical University , Harbin , 150001 , PR China
| | - Mingming Wu
- a Department of Orthodontics, School of Stomatology , Harbin Medical University , Harbin , 150001 , PR China
| | - Ying Wang
- a Department of Orthodontics, School of Stomatology , Harbin Medical University , Harbin , 150001 , PR China
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Yadav S, Assefnia A, Gupta H, Vishwanath M, Kalajzic Z, Allareddy V, Nanda R. The effect of low-frequency mechanical vibration on retention in an orthodontic relapse model. Eur J Orthod 2015; 38:44-50. [DOI: 10.1093/ejo/cjv006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Seifi M, Hamedi R, Khavandegar Z. The Effect of Thyroid Hormone, Prostaglandin E2, and Calcium Gluconate on Orthodontic Tooth Movement and Root Resorption in Rats. JOURNAL OF DENTISTRY (SHIRAZ, IRAN) 2015; 16:35-42. [PMID: 26106633 PMCID: PMC4476115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
STATEMENT OF THE PROBLEM A major objective of investigators is to clarify the role of metabolites in achievement of maximum tooth movement with minimal root damage during orthodontic tooth movement (OTM). PURPOSE The aim of this study was to determine the effect of administration of thyroid hormone, prostaglandin E2, and calcium on orthodontic tooth movement and root resorption in rats. MATERIALS AND METHOD Sixty four male Wistar rats were randomly divided into 8 groups of eight rats each: 1- 20µg/kg thyroxine was injected in traperitoneally after installation of the orthodontic appliance. 2- 0.1 ml of 1 mg/ml prostaglandin E2 was injected submucosally. 3- 10% (200 mg/kg) calcium gluconate was injected. 4- Prostaglandin E2 was injected submucosally and 10% calcium was injected intraperitoneally. 5- Thyroxine was injected intraperitoneally and prostaglandin E2 was injected submucosally. 6- 20µg/kg thyroxine with calcium was injected. 7- Prostaglandin E2 was injected submucosally with calcium and thyroxine. 8- Distilled water was used in control group. The orthodontic appliances comprised of a NiTi closed coil were posteriorly connected to the right first molar and anteriorly to the upper right incisor. OTM was measured with a feeler gauge. The mid-mesial root of the first molar and the adjacent tissues were histologically evaluated. The Data were analyzed by one-way ANOVA and Student-Newman-Keuls test. RESULTS The highest mean OTM was observed in the thyroxine and prostaglandin E2 group (Mean±SD = 0.7375±0.1359 mm) that was significantly different (p< 0.05). A significant difference (p< 0.05) in root resorption was observed between the prostaglandin E2 (0.0192±0.0198 mm(2)) and the other groups. CONCLUSION It seems that the combination of thyroxine and prostaglandin E2, with a synergistic effect, would decrease the root resorption and increase the rate of orthodontic tooth movement in rats.
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Affiliation(s)
- Massoud Seifi
- Dentofacial Deformities Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Roya Hamedi
- Postgraduate Student of Orthodontics, Dental Research Center, Research Institute of Dental Sciences of Shahid Beheshti University of Medical Sciences, Tehran, Iran
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