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Ghislanzoni LH, Kiliaridis S, Antonarakis GS. Headgear therapy in children with Class II malocclusion and the role of compliance on treatment outcome: A nine-month randomized controlled trial. Orthod Craniofac Res 2024; 27:767-774. [PMID: 38685769 DOI: 10.1111/ocr.12802] [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] [Accepted: 04/15/2024] [Indexed: 05/02/2024]
Abstract
OBJECTIVES To evaluate three-dimensional movements of maxillary teeth during headgear treatment in Class II growing children, using digital analytical tools, and to determine the effects of compliance on these movements. MATERIALS AND METHODS A 9-month parallel-group randomized controlled trial was carried out on 40 children with Class II malocclusion, aged 8-12 years, half assigned to receive a cervical headgear and half to a no-treatment group, using block randomization. Subjects in the treatment group were instructed to wear the headgear for 12 hours daily and monitored using an electronic module. After 9 months, the following dental outcomes were measured: first maxillary molar distalisation, rotation, tip and torque, arch depth, and interpremolar and intermolar distances. Caregivers and participants were not blinded to group assignments, but those assessing outcomes were. Linear regression models were used to detect differences between groups and correlation coefficients to find correlations between compliance and dental outcomes. RESULTS All 40 included patients were analysed. A significant difference in molar distalisation was observed between the treatment (1.2 mm) and control groups (-0.2 mm). Arch depth change was also increased to a larger extent in the treatment groups (1.3 mm vs 0.1 mm), as was the interpremolar distance (1.9 mm vs 0.4 mm). In contrast, no significant differences in molar rotation or torque change were observed. With regard to compliance, average compliance was 55%. A significant correlation was found between molar distalisation and compliance in the treatment group. CONCLUSIONS Headgear therapy has significant effects on molar distalisation, arch depth, and arch width. Compliance has a significant positive effect on molar distalisation.
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Affiliation(s)
- Luis Huanca Ghislanzoni
- Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Stavros Kiliaridis
- Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland
| | - Gregory S Antonarakis
- Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
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Zhang Y, Yan J, Zhang Y, Liu H, Han B, Li W. Age-related alveolar bone maladaptation in adult orthodontics: finding new ways out. Int J Oral Sci 2024; 16:52. [PMID: 39085217 PMCID: PMC11291511 DOI: 10.1038/s41368-024-00319-7] [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: 02/09/2024] [Revised: 06/16/2024] [Accepted: 06/18/2024] [Indexed: 08/02/2024] Open
Abstract
Compared with teenage patients, adult patients generally show a slower rate of tooth movement and more pronounced alveolar bone loss during orthodontic treatment, indicating the maladaptation of alveolar bone homeostasis under orthodontic force. However, this phenomenon is not well-elucidated to date, leading to increased treatment difficulties and unsatisfactory treatment outcomes in adult orthodontics. Aiming to provide a comprehensive knowledge and further inspire insightful understanding towards this issue, this review summarizes the current evidence and underlying mechanisms. The age-related abatements in mechanosensing and mechanotransduction in adult cells and periodontal tissue may contribute to retarded and unbalanced bone metabolism, thus hindering alveolar bone reconstruction during orthodontic treatment. To this end, periodontal surgery, physical and chemical cues are being developed to reactivate or rejuvenate the aging periodontium and restore the dynamic equilibrium of orthodontic-mediated alveolar bone metabolism. We anticipate that this review will present a general overview of the role that aging plays in orthodontic alveolar bone metabolism and shed new light on the prospective ways out of the impasse.
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Affiliation(s)
- Yunfan Zhang
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Jiale Yan
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Yuning Zhang
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Hao Liu
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Bing Han
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China.
| | - Weiran Li
- Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
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Wadke A, Kommuri K, Talluri S, Kalladka M, Kalladka G, Khan J. Effect of Lithium on Orthodontic Tooth Movement: a Systematic Review of Animal Studies. Turk J Orthod 2024; 37:63-71. [PMID: 38556955 PMCID: PMC10986460 DOI: 10.4274/turkjorthod.2023.2022.149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 03/15/2023] [Indexed: 04/02/2024]
Abstract
Objective This study aimed to systematically review the effect of lithium on orthodontic tooth movement (OTM). Methods The focus question was "does lithium have an effect on OTM?" A systematic search was conducted using indexed databases and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed. The quality assessment of the selected studies was performed according to the systematic review center for laboratory animal experimentation. Results Five of the initially identified 656 articles fulfilled the eligibility criteria and were selected for this review. The studies reported that lithium administration lowered the rate of OTM by inducing a reduction in the number of osteoclasts and possibly inhibiting osteoclastogenesis. These studies further showed an increase in bone density and bone volume by promoting the Wnt/ß-catenin signaling pathway and osteoblastogenesis. It was also noted that lithium reduced orthodontically induced root resorption during experimental OTM. Further, standardized studies are warranted to understand the impact of lithium in OTM. Overall, the risk of bias for 3 studies was very high, high in 1 study, and moderate in 1 study. Conclusion On an experimental level in animals, lithium decreased the rate of OTM during the active treatment phase by increasing bone density and bone volume and reducing root resorption. In addition, lithium may enhance alveolar bone formation during orthodontic retention. Clinically, this may impact the orthodontic treatment duration in patients receiving lithium, and further studies are needed to understand the true impact of lithium on OTM.
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Affiliation(s)
- Amit Wadke
- Orofacial Pain and TMJ Disorders, Eastman Institute for Oral Health, University of Rochester, NY, USA
| | - Karthik Kommuri
- Orthodontics and Craniofacial Orthopedics, Eastman Institute for Oral Health, University of Rochester, NY, USA
| | - Sandeep Talluri
- Orofacial Pain and TMJ Disorders, Eastman Institute for Oral Health, University of Rochester, NY, USA
| | - Mythili Kalladka
- Orofacial Pain and TMJ Disorders, Eastman Institute for Oral Health, University of Rochester, NY, USA
| | - Goutham Kalladka
- Dayananda Sagar College of Dental Sciences, Department of Orthodontics, Karnataka, India
| | - Junad Khan
- Orofacial Pain and TMJ Disorders, Eastman Institute for Oral Health, University of Rochester, NY, USA
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Kim S, Hwang SJ, Seo MS. Effect of orthodontic treatment on the periapical radiolucency of endodontically treated teeth: a CBCT analysis. BMC Oral Health 2023; 23:289. [PMID: 37179291 PMCID: PMC10183127 DOI: 10.1186/s12903-023-02907-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 03/22/2023] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND This study aimed to evaluate periapical radiolucency of endodontically treated teeth before and after orthodontic treatment using cone-beam computed tomography (CBCT). METHODS Patients who underwent orthodontic treatment at Wonkwang University Daejeon Dental Hospital between January 2009 and June 2022 were included based on the following criteria: root canal treatment, and availability of CBCT images taken before and after orthodontic treatment with an interval of > 1 year between both scans. Patients with primary teeth or orthodontic tooth extractions were excluded. The size of the periapical radiolucency (SPR) of the endodontically treated tooth was evaluated using CBCT. Pre-orthodontic treatment CBCT images and the latest post-orthodontic treatment CBCT images were analyzed. The selected teeth were further categorized based on the orthodontic duration, CBCT interval, the patient sex and age, the tooth type and position (maxilla or mandible), and quality of root canal obturation. Statistical analyses were performed to evaluate changes in SPR using the paired t-test and multiple regression analysis. RESULTS In total, 115 teeth (37 anterior teeth, 22 premolars and 56 molars) from 61 patients (age, 14-54 years) were included, with 39 teeth from male patients and 76 teeth from female patients. The age was ranged between 14 and 54 years old, and mean age was 25.87 years old. The mean CBCT interval and orthodontic treatment period were 43.32 months and 36.84 months, respectively. Seventy-five teeth showed good obturation quality, 80 were not used as anchors during orthodontic treatment, and 71 were maxillary. The SPR size increased after orthodontic treatment for 56 teeth and decreased for 59 cases. The average change in SPR was -0.102 mm and the difference was not significant. Significant decrease of SPR were observed between female patients (p = 0.036) and maxillary teeth (p = 0.040). CONCLUSION Orthodontic treatment had no significant impact on the changes in the SPR in endodontically treated teeth in most categories. However, there was a significant difference among females and the maxillary teeth. In both categories, the size of radiolucency decreased significantly.
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Affiliation(s)
- Sunhong Kim
- Department of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, 77 Dunsan-Ro, Seo-Gu, 35233, Daejeon, Republic of Korea
| | - Soo-Jeong Hwang
- Department of Dentistry, Doonsan Health Promotion Center, Daejeon, Korea
| | - Min-Seock Seo
- Department of Conservative Dentistry, Wonkwang University Daejeon Dental Hospital, 77 Dunsan-Ro, Seo-Gu, 35233, Daejeon, Republic of Korea.
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Daljeet M, Warunek S, Covell DA, Monegro A, Giangreco T, Al-Jewair T. Association between obstructive sleep apnea syndrome and bone mineral density in adult orthodontic populations. Cranio 2022:1-11. [PMID: 36368042 DOI: 10.1080/08869634.2022.2142724] [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: 11/13/2022]
Abstract
OBJECTIVE To determine the association between obstructive sleep apnea syndrome (OSAS) and predicted bone mineral density (BMD) in adults presenting for orthodontic treatment. METHODS This retrospective cross-sectional study included 38 adults divided into OSAS and non-OSAS groups. Using pre-treatment CBCT images, radiographic density (RD) of left and right lateral regions of the 1st cervical vertebrae and dens of the 2nd cervical vertebrae were measured as an indicator for BMD. RESULTS When controlling for age, sex, and BMI, the mean RD was significantly lower in the OSAS group compared to the non-OSAS group (left CV1: 36.69 ± 84.50 vs. 81.67 ± 93.25 Hounsfield Units [HU], respectively, p = 0.031; right CV1: 30.59 ± 81.18 vs. 74.26 ± 91.81 HU, p = 0.045; dens: 159.25 ± 115.96 vs. 223.94 ± 106.09 HU, p = 0.038). CONCLUSION Adults with OSAS have lower values for predicted BMD than those without OSAS.
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Affiliation(s)
| | - Stephen Warunek
- Department of Orthodontics, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - David A Covell
- Department of Orthodontics, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Alberto Monegro
- Pediatric Sleep Center, School of Medicine, University at Buffalo, Buffalo, NY, USA
| | | | - Thikriat Al-Jewair
- Department of Orthodontics, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
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Gratton MP, Londono I, Rompré P, Villemure I, Moldovan F, Nishio C. Effect of vitamin D on bone morphometry and stability of orthodontic tooth movement in rats. Am J Orthod Dentofacial Orthop 2022; 162:e319-e327. [DOI: 10.1016/j.ajodo.2022.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 08/01/2022] [Accepted: 08/01/2022] [Indexed: 11/01/2022]
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Arizono-Shimada K, Hotokezaka H, Morita Y, Ino-Kondo A, Ueda-Ichinose Y, Nashiro Y, Hotokezaka Y, Yoshimi K, Kiliaridis S, Yoshida N. The effect of masseter muscle mass on the rate of experimental tooth movement in rats. J Oral Rehabil 2022; 49:1012-1019. [PMID: 35842739 DOI: 10.1111/joor.13357] [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: 12/13/2021] [Revised: 05/22/2022] [Accepted: 07/01/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Previous clinical observational studies have suggested that orthodontic tooth movement (OTM) is related, at least partly, to the mass and/or capabilities of the masticatory muscles. OBJECTIVES Our study aimed to examine the influence of masticatory muscle mass on the OTM in an animal experimental model in which the masseter muscle was modulated by botulinum neurotoxin type A (BTX) injection. METHODS Eighteen Wistar rats were equally divided into two groups: BTX injection and control. BTX was injected bilaterally into the masseter muscles. Three days after the injection, the maxillary left first molars were orthodontically moved for 14 days. At the end of the experiment, micro-computed tomography was performed to evaluate the rate of OTM and bone morphometry. The masseter muscles were weighed and prepared for histological analyses. RESULTS The masseter muscle mass in the BTX group was less than that in the control group, and histological findings showed atrophy of muscle fibers. The rate of OTM was significantly higher in the BTX group than in the control group. Furthermore, a negative correlation was detected between masseter muscle mass and OTM in the BTX group. Bone morphometry showed no difference between the control and BTX groups. CONCLUSION Decreased masseter muscle mass was found to be closely related to an increase in the rate of OTM in rats using BTX injection to modify the masseter muscle mass. Masseter muscle mass could be a predictive factor for OTM in rats injected with BTX.
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Affiliation(s)
- Keira Arizono-Shimada
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Hitoshi Hotokezaka
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yukiko Morita
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Airi Ino-Kondo
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuika Ueda-Ichinose
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yukako Nashiro
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuka Hotokezaka
- Department of Clinical Oral Oncology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | | | - Stavros Kiliaridis
- Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva.,Department of Orthodontics, Dentofacial Orthopedics, University of Bern, Bern, Switzerland
| | - Noriaki Yoshida
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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Nara Y, Kitaura H, Marahleh A, Ohori F, Noguchi T, Pramusita A, Kinjo R, Ma J, Kanou K, Mizoguchi I. Enhancement of orthodontic tooth movement and root resorption in ovariectomized mice. J Dent Sci 2021; 17:984-990. [PMID: 35756770 PMCID: PMC9201653 DOI: 10.1016/j.jds.2021.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/18/2021] [Indexed: 11/07/2022] Open
Abstract
Background/purpose As the number of patients with osteoporosis requiring orthodontic treatment is increasing with the aging of society, it is necessary to evaluate the relations between bone metabolism in old age and orthodontic tooth movement (OTM). However, the effects of changes in bone metabolism due to osteoporosis on OTM and root resorption are still unclear. Therefore, we investigated the effects of OTM and root resorption in a mouse ovariectomy (OVX)-induced osteoporosis model. Materials and methods Eight-week-old female wild-type mice underwent OVX or sham surgery (Sham) as controls. One month after treatment, a nickel titanium coil spring was used to apply a mesial force to the maxillary left first molars of OVX or Sham mice for 12 days. The distance between the maxillary first molar and the second molar changed due to OTM and osteoclast formation was evaluated. The odontoclast formation and root resorption along the root surface of the distobuccal root of the first molar was also evaluated by histological analysis and scanning electron microscopy. Results Distance of tooth movement and osteoclast formation were significantly increased in OVX mice compared to Sham controls. Furthermore, root resorption in the mesial surface of the distal molars induced by orthodontic force was significantly increased in OVX mice. Conclusion The amount of OTM was significantly increased, and the accompanying root resorption was also increased in OVX mice. Therefore, attention should be paid to the risk of root resorption associated with orthodontic treatment in patients with osteoporosis.
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Mohammed AO, Kaklamanos EG. Effect of ovariectomy-induced osteoporosis on the amount of orthodontic tooth movement: a systematic review of animal studies. Eur J Orthod 2021; 43:672-681. [PMID: 33866368 DOI: 10.1093/ejo/cjab013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Understanding the impact of osteopenia and osteoporosis on orthodontic tooth movement could be of benefit to the orthodontist, but research in humans presents practical and ethical problems. The ovariectomized animal model could provide useful information on osteoporosis. OBJECTIVE To compare the amount of tooth movement during or after the application of orthodontic forces between ovariectomized animals and control or sham-operated subjects. SEARCH METHODS Unrestricted searches in seven databases and manual searching of the reference lists in relevant studies were performed up to February 2021 (PubMed, Central, Cochrane Database of Systematic Reviews, Scopus, Web of Science, Arab World Research Source, ProQuest Dissertations, and Theses Global). SELECTION CRITERIA We searched for studies quantitatively comparing the amount of tooth movement during or after the application of orthodontic forces between ovariectomized animals and control or sham-operated subjects. DATA COLLECTION AND ANALYSIS Following study retrieval and selection, relevant data were extracted, and the risk of bias was assessed using the SYRCLE's Risk of Bias Tool. Exploratory synthesis and meta-regression were carried out using the random effects model. RESULTS Thirteen studies were finally selected and no specific concerns regarding bias were identified. During the active period, ovariectomy was associated with a statistically significant acceleratory effect on the rate of orthodontic tooth movement compared to non-treated rats (3 weeks; 4 studies, 0.15 mm more movement in the ovariectomized rats; 95 per cent confidence interval: 0.10-0.19; P = 0.000). Exploratory meta-regression showed that this difference could increase over time. Following force discontinuation, no statistically significant differences were observed [3 weeks; 1 study (median ± SE), Ovariectomy group: 0.30 ± 0.04 mm; Sham operation group: 0.18 ± 0.03; P = 0.1558]. CONCLUSIONS Ovariectomy-induced osteoporosis may affect the rate of orthodontic tooth movement. Although animal studies should be approached with caution regarding their translational potential, the safe practice would suggest that one should consider potential implications. REGISTRATION PROSPERO (CRD42018118003).
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Affiliation(s)
- Ayesha O Mohammed
- Dubai Health Authority, Dubai, United Arab Emirates.,Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - Eleftherios G Kaklamanos
- Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
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Landin-Ramos M, Yadav S, Gandhi V, Upadhyay M, Tadinada A. Is there a relationship between mandibular cortical bone thickness and orthodontic treatment time? Angle Orthod 2021; 90:794-800. [PMID: 33378521 DOI: 10.2319/012220-42.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/01/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To determine whether there was a correlation between patients' bone thickness and time spent in orthodontic treatment. The secondary aim was to study the influence of Angle classification, extraction treatment, and age on overall treatment duration. MATERIALS AND METHODS In this retrospective study, records of 971 orthodontic patients from two centers were reviewed and 500 subjects were included after imposing inclusion/exclusion criteria. The Mental Index was used to determine patients' bone density. For the Mental Index, a line perpendicular to the inferior border of the mandible was drawn on a panoramic radiograph so that it intersected the inferior border of the mental foramen. The mandibular cortical thickness was measured along this line. Two-sample t-test or a chi-square test, followed by multiple linear regression, were used to identify the factors affecting treatment duration. RESULTS Mandibular cortical thickness was negatively associated with treatment time for all subjects (P < .05). After adjusting for covariables, it remained significant for center-1, but non-significant for center-2 subjects. Angle Class II and Class III malocclusion, extraction therapy, and age had significant positive correlations with treatment duration (P < .05). CONCLUSIONS There is a negative correlation between the mandibular cortical thickness and orthodontic treatment duration. An extraction treatment plan and treatment of Angle Class II and Class III malocclusions significantly increase the duration of orthodontic treatment. Additionally, patients over 12 years of age have shorter treatment times compared to patients under 12 years of age.
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Ullrich N, Schröder A, Bauer M, Spanier G, Jantsch J, Deschner J, Proff P, Kirschneck C. The role of HIF-1α in nicotine-induced root and bone resorption during orthodontic tooth movement. Eur J Orthod 2020; 43:516-526. [PMID: 33043973 DOI: 10.1093/ejo/cjaa057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND In orthodontic tooth movement (OTM), pseudo-inflammatory processes occur that are similar to those of nicotine-induced periodontitis. Previous studies have shown that nicotine accelerates OTM, but induces periodontal bone loss and dental root resorption via synergistically increased osteoclastogenesis. This study aimed to investigate the role of hypoxia-inducible factor 1 alpha (HIF-1α) in nicotine-induced osteoclastogenesis during OTM. MATERIALS/METHODS Male Fischer-344 rats were treated with l-Nicotine (1.89 mg/kg/day s.c., N = 10) or NaCl solution (N = 10). After a week of premedication, a NiTi spring was inserted to mesialize the first upper left molar. The extent of dental root resorption, osteoclastogenesis, and HIF-1α protein expression was determined by (immuno)histology, as well as bone volume (BV/TV) and trabecular thickness (TbTh) using µCT. Receptor activator of nuclear factor of activated B-cells ligand (RANK-L), osteoprotegerin (OPG), and HIF-1α expression were examined at the protein level in periodontal ligament fibroblasts (PDLF) exposed to pressure, nicotine and/or hypoxia, as well as PDLF-induced osteoclastogenesis in co-culture experiments with osteoclast progenitor cells. RESULTS Nicotine favoured dental root resorptions and osteoclastogenesis during OTM, while BV/TV and TbTh were only influenced by force. This nicotine-induced increase does not appear to be mediated by HIF-1α, since HIF-1α was stabilized by force application and hypoxia, but not by nicotine. The in vitro data showed that the hypoxia-induced increase in RANK-L/OPG expression ratio and PDLF-mediated osteoclastogenesis was less pronounced than the nicotine-induced increase. CONCLUSIONS Study results indicate that the nicotine-induced increase in osteoclastogenesis and periodontal bone resorption during OTM may not be mediated by hypoxic effects or HIF-1α stabilization in the context of nicotine-induced vasoconstriction, but rather by an alternative mechanism.
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Affiliation(s)
- Niklas Ullrich
- Department of Orthodontics, University Medical Centre of Regensburg, Germany
| | - Agnes Schröder
- Department of Orthodontics, University Medical Centre of Regensburg, Germany
| | - Maria Bauer
- Department of Orthodontics, University Medical Centre of Regensburg, Germany
| | - Gerrit Spanier
- Department of Oral and Maxillofacial Surgery, University Medical Centre of Regensburg, Germany
| | - Jonathan Jantsch
- Department of Medical Microbiology and Hygiene, University Medical Centre of Regensburg, Germany
| | - James Deschner
- Department of Periodontology and Operative Dentistry, University Medicine Mainz, Germany
| | - Peter Proff
- Department of Orthodontics, University Medical Centre of Regensburg, Germany
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Lopes LLDA, de Barros Silva PG, Damasceno JX, Martins JODL, da Silva KR, de Sousa FB, Dantas HV, Ribeiro TR, Alencar PNB. Microtomographic analysis of the effect of sodium alendronate on orthodontic movement in rats. Orthod Craniofac Res 2020; 24:96-101. [PMID: 32639673 DOI: 10.1111/ocr.12410] [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: 04/20/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To evaluate the effect of sodium alendronate on orthodontic tooth movement in rats using microtomographic analysis. SETTINGS AND SAMPLE POPULATION Thirty male Wistar rats (Rattus norvegicus) were divided into three groups of 10 rats and administered saline (control), 1 mg/kg sodium alendronate or 6 mg/kg sodium alendronate, respectively. MATERIALS AND METHODS The drug was administered once per week for 5 weeks by gavage. Orthodontic movement was induced during the last 2 weeks of medication administration by inserting a closed nickel-titanium spring between the left upper first molar and central incisors. The opposite side served as the control. Tooth movement and bone trabeculation in the furcation region were evaluated by microtomographic analysis in the first (moved) and third (static) molars. The data were subjected to one-way or two-way ANOVA and Bonferroni test (P < .05). RESULTS The microtomographic images of the group that received 6 mg/kg sodium alendronate demonstrated significantly less tooth movement (P = .048), less space between the trabeculae (P = .031) and greater number of bone trabeculae (P = .033) compared to the other groups. There were no statistically significant differences in bone volume and mean trabecular thickness between the three groups. The static teeth did not show the same alterations (P > .05). CONCLUSION Sodium alendronate treatment reduced tooth movement in rats.
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Affiliation(s)
| | | | | | | | - Karla Rovaris da Silva
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, João Pessoa, Brazil
| | - Frederico Barbosa de Sousa
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, João Pessoa, Brazil
| | - Hugo Victor Dantas
- Postgraduate Program in Dentistry, Health Sciences Center, Federal University of Paraíba, João Pessoa, Brazil
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Amaro ERS, Ortiz FR, Dorneles LS, Santos MDS, Barrioni BR, Miranda RM, Garlet GP, Teixeira MM, Szawka RE, Silva TA, Macari S. Estrogen protects dental roots from orthodontic-induced inflammatory resorption. Arch Oral Biol 2020; 117:104820. [PMID: 32592932 DOI: 10.1016/j.archoralbio.2020.104820] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 05/06/2020] [Accepted: 06/14/2020] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Root resorption is a side effect of orthodontic tooth movement (OTM). Despite the recognized role of estrogen on bone, there is little information about their effects on orthodontic-induced inflammatory root resorption (OIIRR). We aimed to investigate if estrogen deficiency affects OIIRR in two mice strains. METHODS Female Balb/C (Balb) and C57BL6/J (C57) mice were ovariectomized (OVX) and replaced with estradiol (E2). Tooth samples subjected or not to OTM were collected and analyzed by microCT, histomorphometry and qPCR. RESULTS OVX resulted in decreased root volume (RV/TV) and root mineral density (RMD) in Balb mice without OTM. In contrast, OVX did not modify physiological root structure of C57 mice. OTM and OIIRR were increased after OVX in both mice strains after 30 days. E2 replacement reversed this phenotype in Balb, but not in C57 mice. Due to the significant increase of OIIRR in OVX Balb mice, the expression of key molecules was investigated in periodontium. Accordingly, these mice showed increased expression of receptor activator of nuclear factor kappa-B ligand (RANKL), tumor necrosis factor alpha, matrix metalloproteinases-2 and -13 and decreased osteoprotegerin (OPG) and interleukin-10 expression after OTM. E2 replacement reversed the changes of these markers. CONCLUSION The lack of estrogen in Balb mice without OTM triggered loss of root structure which was positively correlated to RANKL/OPG ratio. Regardless of mouse strain, the absence of estrogen following OTM induced OIIRR. Mechanisms involve the imbalance of RANKL/OPG system, inflammatory and osteoclastic makers.
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Affiliation(s)
- Eduarda R S Amaro
- Department of Restorative Destistry, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fernanda Ruffo Ortiz
- Department of Pediatric Dentistry, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Leandro S Dorneles
- Department of Structural Engineering, Faculty of Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mariana de Souza Santos
- Department of Restorative Destistry, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Breno Rocha Barrioni
- Department of Metallurgical and Materials Engineering, Faculty of Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Roberta Magalhães Miranda
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gustavo P Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Mauro M Teixeira
- Department of Biochemistry and Immunology, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Raphael E Szawka
- Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tarcília A Silva
- Department of Oral Pathology and Surgery, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Soraia Macari
- Department of Restorative Destistry, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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Zymperdikas VF, Yavropoulou MP, Kaklamanos EG, Papadopoulos MA. Effects of systematic bisphosphonate use in patients under orthodontic treatment: a systematic review. Eur J Orthod 2020; 42:60-71. [PMID: 31009953 DOI: 10.1093/ejo/cjz021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Bisphosphonates are a class of drugs prescribed for several osseous related disorders owing to their ability to regulate bone turnover, which could in turn affect orthodontic treatment outcomes. OBJECTIVE To examine the effect of bisphosphonate (BP) use on orthodontic patients through clinical and radiographic measurements. SEARCH METHODS Systematic and unrestricted search of 17 databases complemented with additional hand-searches were performed up to March 2019. SELECTION CRITERIA Articles reporting on human patients with a history of BPs administration that received orthodontic treatment were eligible for inclusion. DATA COLLECTION AND ANALYSIS Data regarding the medical profile of the patients, the specific type of malocclusion and the performed treatment plan, as well as the clinical and radiographic outcomes were extracted. Quality assessment was performed by the ROBINS-I tool for the cohort studies and by a slightly modified checklist from the original one proposed by Agbabiaka et al. for the case reports. RESULTS 7 articles (1 retrospective cohort study and 6 case reports) were eventually included in the present review including 122 subjects (29 patients and 93 controls) reporting on the clinical and radiographic changes following orthodontic treatment of patients during or after BPs use. BPs seem to have a controversial effect on the clinical and patient-reported variables, even though the majority of the included patients presented with compromised treatment results and a rather slow rate of tooth movement. Most radiographic findings revealed mild root resorption, widened periodontal ligament spaces and sclerotic changes on the surrounding alveolar bone. However, these results should be interpreted with caution, due to the limited number of the eligible articles and their limitations. LIMITATIONS The included studies were of rather low quality due to study design and incomplete reporting. CONCLUSIONS AND IMPLICATIONS BP administration seems to be associated with compromised clinical outcomes, prolonged treatment time, and moderate changes on the roots and surrounding tissues of orthodontic patients. REGISTRATION Non-registered. FUNDING None.
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Affiliation(s)
- Vasileios F Zymperdikas
- Department of Orthodontics, School of Health Sciences, Faculty of Dentistry, Aristotle University of Thessaloniki, Greece.,Department of Training and Operations, Military Hospital of Thessaloniki, Greece
| | - Maria P Yavropoulou
- 1st Propaedeutic Department of Internal Medicine, National and Kapodistrian University of Athens, Greece
| | - Eleftherios G Kaklamanos
- Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| | - Moschos A Papadopoulos
- Department of Orthodontics, School of Health Sciences, Faculty of Dentistry, Aristotle University of Thessaloniki, Greece
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15
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Mena Laura EE, Cestari TM, Almeida R, Pereira DS, Taga R, Garlet GP, Assis GF. Metformin as an add-on to insulin improves periodontal response during orthodontic tooth movement in type 1 diabetic rats. J Periodontol 2019; 90:920-931. [PMID: 30698273 DOI: 10.1002/jper.18-0140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 12/20/2018] [Accepted: 01/21/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Type 1 diabetes (T1D) is associated with delayed tissue healing and bone loss. Periodontal tissues during tooth movement (OTM) in T1D and under diabetic treatment are poorly understood. We aimed to study the effect of metformin as an add-on to insulin therapy on periodontal structures during OTM in T1D rats. METHODS Rats were divided into normoglycemic (NG, n = 20) and streptozotocin-induced diabetic groups that were untreated (T1D, n = 20), treated with insulin (I-T1D, n = 20), or treated with insulin plus metformin (IM-T1D, n = 20). After 7 days of treatment, the first right upper molar (M1) was moved mesially. At days 0, 3, 7 and 14, the pattern of OTM and the periodontal tissues were analyzed by micro-CT, histomorphometry, and immunohistochemistry for TRAP. RESULTS In T1D, major osteoclastogenic activity and bone loss versus other groups were confirmed by a greater TRAP-positive cell number and reabsorption surface on both the pressure and tension sides for 14 days (p < 0.01). Additionally, we observed low bone volume density. Metformin plus insulin resulted in a daily insulin dose reduction and major glycemic control versus I-T1D. Although no significant differences were observed between I-T1D and IM-T1D, the tooth displacement and inclination, periodontal ligament thickness, and alveolar bone density on the pressure side in IM-T1D were similar to that of NG (p > 0.05). CONCLUSION Antidiabetic treatment reduces severe periodontal damage during applied orthodontic force in T1D untreated rats. Metformin as an add-on to insulin therapy resulted in glycemic control and a periodontal tissue response to orthodontic forces that was similar to that of normoglycemic rats.
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Affiliation(s)
- Ever Elias Mena Laura
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Tania Mary Cestari
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Rodrigo Almeida
- Department of Bioprocess and Biotechnology, School of Pharmaceutical Sciences, Universidade Estadual Paulista-UNESP, Araraquara, São Paulo, Brazil
| | - Daniela Santos Pereira
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Rumio Taga
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Gustavo Pompermaier Garlet
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
| | - Gerson Francisco Assis
- Department of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil
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A Novel Method to Quantify Longitudinal Orthodontic Bone Changes with In Vivo Micro-CT Data. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:1651097. [PMID: 30364010 PMCID: PMC6188591 DOI: 10.1155/2018/1651097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 07/29/2018] [Indexed: 02/04/2023]
Abstract
Orthodontic tooth movement (OTM) is the result of region-specific bone modeling under a load. Quantification of this change in the alveolar bone around a tooth is a basic requirement to understand the mechanism of orthodontics. The purpose of this study was to quantify subregional alveolar bone changes during orthodontic tooth movement with a novel method. In this study, 12 Sprague-Dawley (SD) rats were used as an orthodontic model, and one side of the first upper molar was used to simulate OTM. The alveolar bone around the mesial root was reconstructed from in vivo micro-CT images and separated from other parts of the alveolar bone with two semicylinder filters. The amount and rate of OTM, bone mineral density (BMD), and bone volume (BV) around the root were calculated and compared at 5 time points. The results showed that the amount of tooth movement, BMD, and BV can be evaluated dynamically with this method. The molar moved fastest during the first 3 days, and the rate decreased after day 14. BMD decreased from day 0 to day 14 and returned from day 14 to day 28. BV deceased from day 0 to day 7 and from day 14 to day 28. The method created in this study can be used to accurately quantify dynamic alveolar bone changes during OTM.
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Tsolakis AI, Khaldi L, Bitsanis I, Alexandridis C, Triantafyllou Α, Spyropoulos MN, Dontas IA. The effect of osteopenia on tooth movement in ovariectomized rats. An experimental study. JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS 2018; 18:366-374. [PMID: 30179214 PMCID: PMC6146199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE The purpose of this experimental study was to investigate in depth the effects of osteopenia related to the rate, as well as to the quality of orthodontic tooth movement, by combining experimental ovariectomy and molar movement in rats. METHODS Twenty-four six-month-old female Wistar rats were used in this study. The animals were divided into two groups consisting of twelve animals each: Group A (control group) was subjected to orthodontic movement of the upper right first molars. Group B was subjected to orthodontic movement of the upper right first molar following bilateral ovariectomy. Ovariectomy was performed on the first experimental day and the upper right first molars were subjected to orthodontic forces 60 days post-ovariectomy, lasting for 14 days. RESULTS AND CONCLUSION Direct inspections of the upper jaws, measurements of orthodontic movement of the upper right first molars of Group A and B, as well as histologic examinations of the alveolar bone in the upper right and left first molar regions, showed that osteopenia affects the rate of orthodontic tooth movement, as well as the quality of alveolar bone remodeling, in ovariectomized rats. Specifically, in the ovariectomized animals the alveolar bone of the non-loaded side showed extensive internal resorption, with large marrow cavities, whereas the alveolar bone of the loaded side was dense with almost no marrow cavity and frontal resorption on the surface. It appears that alveolar remodeling after the exertion of orthodontic forces follows the general paradigm of osteoporotic bone remodeling after loading.
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Affiliation(s)
- Apostolos I. Tsolakis
- Department of Orthodontics, School of Dentistry, National & Kapodistrian University of Athens, Greece,Corresponding author: Apostolos I. Tsolakis, DDS, MSD, PhD, Leoforos Pentelis 66, Vrilissia, Athens, Greece E-mail:
| | - Lubna Khaldi
- Department of Pathology, “Saint Savvas” Anticancer Hospital, Athens, Greece,Laboratory for Research of the Musculoskeletal System, School of Medicine, National & Kapodistrian University of Athens, KAT Hospital, Greece
| | - Ilias Bitsanis
- Department of Orthodontics, School of Dentistry, National & Kapodistrian University of Athens, Greece
| | - Constantine Alexandridis
- Department of Oral and Maxillofacial Surgery, School of Dentistry, National & Kapodistrian University of Athens, Greece
| | - Αggeliki Triantafyllou
- Laboratory for Research of the Musculoskeletal System, School of Medicine, National & Kapodistrian University of Athens, KAT Hospital, Greece
| | - Meropi N. Spyropoulos
- Department of Orthodontics, School of Dentistry, National & Kapodistrian University of Athens, Greece
| | - Ismene A. Dontas
- Laboratory for Research of the Musculoskeletal System, School of Medicine, National & Kapodistrian University of Athens, KAT Hospital, Greece
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Ino-Kondo A, Hotokezaka H, Kondo T, Arizono K, Hashimoto M, Hotokezaka Y, Kurohama T, Morita Y, Yoshida N. Lithium chloride reduces orthodontically induced root resorption and affects tooth root movement in rats. Angle Orthod 2018; 88:474-482. [PMID: 29607672 DOI: 10.2319/112017-801.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE To investigate the influence of lithium chloride (LiCl) on orthodontic tooth movement (OTM), orthodontically induced root resorption (OIRR), and bone morphometry. MATERIALS AND METHODS Ten-week-old female Sprague Dawley rats (n = 32) were divided into four groups based on the concentration of LiCl administered daily per kilogram body weight: 0 (control group), 0.32, 0.64, and 1.28 mM/kg body weight. The maxillary left first molars were moved mesially by a 10 cN coil spring for 14 days. Micro-computed tomography, scanning electron microscope, and scanning laser microscope images were taken to measure the amount of OTM, the volume of OIRR, and bone morphometry. RESULTS OIRR clearly decreased depending on the amount of LiCl administered, although OTM moderately decreased. The tooth inclined mesially and the root apex moved distally in the control and 0.32 mM groups. On the other hand, the tooth inclination angle became smaller and the root apex moved mesially in the 0.64 and 1.28 mM groups. In bone morphometry, the cortical bone mineral content and bone volume increased because of LiCl administration, and the trabecular bone measurements decreased. OIRR negatively correlated to the cortical bone measurements, and the amount of OTM significantly correlated to the cortical bone morphometry. CONCLUSIONS In rats, LiCl reduced OIRR, which induced mesial movement of the tooth root apex. OIRR positively correlated to cortical bone morphometry.
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Abstract
As the number of elderly orthodontic patients increases, the impact of postmenopausal osteoporosis on orthodontic tooth movement (OTM) has attracted a great deal of attention because OTM relies on alveolar bone remodeling. The question of whether OTM causes subsequent alveolar bone loss and is harmful to alveolar bone health under osteoporotic conditions remains to be answered. The present study aimed to clarify the influences of OTM on alveolar bone in osteoporotic rats. OTM was accelerated in ovariectomized (OVX) rats as a result of increased bone resorption in the pressure area. At the same time, anabolic bone formation was promoted in the tension area during OTM in OVX rats. Micro-CT analysis of alveolar bone revealed a decrease in BMD, BV/TV and Tb.Th. in the OTM group compared with that in non-OTM rats on day 21 of OTM, suggesting that OTM caused alveolar bone loss in OVX rats during OTM. However, the OTM-induced bone loss could be recovered 3 months after OTM in OVX rats. Thus, our findings suggest that increased osteogenesis may compensate for the increased bone resorption during and after OTM and enable effective accelerated OTM in OVX rats.
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Hao J, Zhang Y, Jing D, Shen Y, Tang G, Huang S, Zhao Z. Mechanobiology of mesenchymal stem cells: Perspective into mechanical induction of MSC fate. Acta Biomater 2015; 20:1-9. [PMID: 25871537 DOI: 10.1016/j.actbio.2015.04.008] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 03/26/2015] [Accepted: 04/07/2015] [Indexed: 02/05/2023]
Abstract
Bone marrow-derived mesenchymal stem and stromal cells (MSCs) are promising candidates for cell-based therapies in diverse conditions including tissue engineering. Advancement of these therapies relies on the ability to direct MSCs toward specific cell phenotypes. Despite identification of applied forces that affect self-maintenance, proliferation, and differentiation of MSCs, mechanisms underlying the integration of mechanically induced signaling cascades and interpretation of mechanical signals by MSCs remain elusive. During the past decade, many researchers have demonstrated that external applied forces can activate osteogenic signaling pathways in MSCs, including Wnt, Ror2, and Runx2. Besides, recent advances have highlighted the critical role of internal forces due to cell-matrix interaction in MSC function. These internal forces can be achieved by the materials that cells reside in through its mechanical properties, such as rigidity, topography, degradability, and substrate patterning. MSCs can generate contractile forces to sense these mechanical properties and thereby perceive mechanical information that directs broad aspects of MSC functions, including lineage commitment. Although many signaling pathways have been elucidated in material-induced lineage specification of MSCs, discovering the mechanisms by which MSCs respond to such cell-generated forces is still challenging because of the highly intricate signaling milieu present in MSC environment. However, bioengineers are bridging this gap by developing platforms to control mechanical cues with improved throughput and precision, thereby enabling further investigation of mechanically induced MSC functions. In this review, we discuss the most recent advances that how applied forces and cell-generated forces may be engineered to determine MSC fate, and overview a subset of the operative signal transduction mechanisms and experimental platforms that have emerged in MSC mechanobiology research. Our main goal is to provide an up-to-date view of MSC mechanobiology that is relevant to both mechanical loading and mechanical properties of the environment, and introduce these emerging platforms for tissue engineering use.
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Predictive value of masseter muscle thickness and bite force on Class II functional appliance treatment: a prospective controlled study. Eur J Orthod 2015; 37:570-7. [DOI: 10.1093/ejo/cju089] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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de Araujo CM, Johann ACBR, Camargo ES, Tanaka OM. The effects of binge-pattern alcohol consumption on orthodontic tooth movement. Dental Press J Orthod 2014; 19:93-8. [PMID: 25628085 PMCID: PMC4347416 DOI: 10.1590/2176-9451.19.6.093-098.oar] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 04/02/2014] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE: This study aimed to assess tissue changes during orthodontic movement after
binge-pattern ethanol 20% exposure. METHODS: Male Wistar rats (n = 54) were divided into two groups. The control group (CG)
received 0.9% saline solution, while the experimental group (EG) received 20%
ethanol in 0.9% saline solution (3 g/kg/day). On the 30th day, a force
of 25 cN was applied with a nickel-titanium closed coil spring to move the
maxillary right first molar mesially. The groups were further divided into three
subgroups (2, 14 and 28 days). Tartrate-resistant acid phosphatase and picrosirius
were used to assess bone resorption and neoformation, respectively. Data were
compared by two-way ANOVA, Tukey's HSD, Games-Howell and chi-square test.
Significance level was set at 5%. RESULTS: There was a decrease in the number of osteoclasts in EG at day 28. The percentage
of collagen showed no interaction between group and time. CONCLUSION: Binge-pattern 20% ethanol promoted less bone resorption at the end of tooth
movement, thereby suggesting delay in tooth movement.
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Venkataramana V, Chidambaram S, Reddy BV, Goud EVSS, Arafath M, Krishnan6 S. Impact of Bisphosphonate on Orthodontic tooth movement and osteoclastic count: An Animal Study. J Int Oral Health 2014; 6:1-8. [PMID: 24876695 PMCID: PMC4037805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 12/15/2013] [Indexed: 06/03/2023] Open
Abstract
Background : The aim of the current study is to examine the effect of systemically administered BP-Pamidronate, on Orthodontic Tooth Movement (OTM) along with osteoclastic quantification in New Zealand white rabbits. Materials & Methods : Twenty rabbits used in the study, were equally divided into 2 groups ; Group-1 as Control & Group-2 as Experimental. A sentalloy NITI closed coil spring (GAC International, USA) of 100 gram force, ligated between the lower first molar and the anterior most incisors of the rabbit has served as orthodontic force element. The BP- Pamidronate was administered at the dosage of 1.5 mg/kg body intra-peritonially, on the 1st, 7th and 14th day of the experiment. On the 21st day both group of animals were sacrificed, mandibles were dissected. The formed diastema between the 1st and 2nd molar was measured on the dissected mandibles using standard metric scale, which is considered as the OTM in the mesial direction. Next, the alveolar bone regions along with intact mesial surfaces were processed for histological investigation (osteoclastic count). Results : The student 't' test has been done to compare the mean values of molar tooth movement and osteoclastic count. Parameter :1 molar tooth movement has shown a significant difference between the control (3.750 ± 0.548 mm) and the experimental group (3.050 ± 0.556 mm) with calculated 'p' value (p-value <0.05) is significant at 0.0110 level. Parameter : 2 osteoclastic count has shown a significant difference between the control (13.335000 ± 0.735856 per square mm.) and the experimental group (11.426900 ± 1.49369 per square mm) calculated 'p' value (p-value <0.05) is significant at 0.003 level. Conclusion : The molar tooth movement and the osteoclastic count were significantly reduced in BP - Pamidronate administered animals than non-drug recipients. How to cite the article: Venkataramana V, Chidambaram S, Reddy BV, Goud EV, Arafath M, Krishnan S. Impact of Bisphosphonate on Orthodontic tooth movement and olsteoclastic count: An Animal Study. J Int Oral Health 2014;6(2):1-8.
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Affiliation(s)
- V Venkataramana
- Department of Orthodontics & Dento-facial Orthopaedics, Panineeya Mahavidhyalaya Institute of Dental Sciences, Kamalanagar, Dilshuknagar, Hyderabad, Andhra Pradesh, India
| | - S Chidambaram
- Department of Orthodontics & Dento-facial Orthopaedics, Rajah Muthiah College of Dental Sciences, Annamalai University, Chidambaram, Tamil Nadu, India
| | - B Vishnuvardhan Reddy
- Department of Orthodontics, G Pulla Reddy Dental College & Hospital, G Pulla Reddy Nagar, Kurnool, Andhra Pradesh, India
| | - E V Soma Shekara Goud
- Department of Oral & Maxillofacial Pathology, Chandra Dental College, Uttar Pradesh, India
| | - Mohammed Arafath
- Department of Orthodontics & Dentofacial Orthopedics, Rajah Muthiah College of Dental Sciences, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Santhana Krishnan6
- Division of Orthodontics & Dento-facial Orthopedics, Rajah Muthiah College of Dental Sciences, Annamalai University, Chidambaram, Tamil Nadu, India
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Kirschneck C, Proff P, Fanghaenel J, Behr M, Wahlmann U, Roemer P. Differentiated analysis of orthodontic tooth movement in rats with an improved rat model and three-dimensional imaging. Ann Anat 2013; 195:539-53. [DOI: 10.1016/j.aanat.2013.08.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 08/26/2013] [Accepted: 08/28/2013] [Indexed: 01/06/2023]
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Chao M, Hua Q, Yingfeng Z, Guang W, Shufeng S, Yuzhen D, Wei W, Haifeng T. Study on the role of zoledronic acid in treatment of postmenopausal osteoporosis women. Pak J Med Sci 2013; 29:1381-4. [PMID: 24550958 PMCID: PMC3905367 DOI: 10.12669/pjms.296.3677] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 08/22/2013] [Accepted: 08/30/2013] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE We aimed to assess the role of zoledronic acid (ZOL) on the risk of fracture and bone mineral density (BMD) in women with osteoporosis. METHODS A double-blind and placebo-controlled design was taken in our study. 327 patients who received an intravenous 5-mg infusion zoledronic acid at day 0, at 12 months were enrolled in treatment group, and the remaining 333 patients who received placebo at the same time of the treatment group were included as control group. The incidence of fracture and BMD in the femoral neck and total hip were assessed. RESULTS ZOL group had lower incidence of fracture at any clinical fracture, clinical vertebral fracture, non-vertebral fracture and hip fracture compared with placebo group at the time of one year and three years. We found that the BMD were significantly increased at femoral neck and total hip in ZOL group at the time of one year and three years follow-up when compared with placebo group (P<0.05). The adverse events in the ZOL within three days of drug infusion were significantly higher than the control group, but we did not find significant difference in the serious adverse effect between the two groups. CONCLUSIONS Zoledronic acid (ZOL) could be used as a safe and effective method for female with osteoporosis.
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Affiliation(s)
- Ma Chao
- Ma Chao, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Qin Hua
- Qin Hua, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Zhou Yingfeng
- Zhou Yingfeng, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Wan Guang
- Wan Guang, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Shi Shufeng
- Shi Shufeng, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Dong Yuzhen
- Dong Yuzhen, Department of Orthopedic Surgery, The First Affiliated Hospital of Xinxiang Medical College, Weihui, China.
| | - Wang Wei
- Wang Wei, Department of Community, Second People’s Hospital of Ji’nan, Ji’nan, China.
| | - Tan Haifeng
- Tan Haifeng, Department of Digestion, Second People’s Hospital of Ji’nan, Ji’nan, China.
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