1
|
Papadopoulos N, Beindorff N, Hoffmann S, Jost-Brinkmann PG, Präger TM. Impact of piezocision on orthodontic tooth movement. Korean J Orthod 2021; 51:366-374. [PMID: 34803025 PMCID: PMC8607123 DOI: 10.4041/kjod.2021.51.6.366] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 06/14/2021] [Accepted: 07/02/2021] [Indexed: 11/10/2022] Open
Abstract
Objective This study investigated the impact of a single piezocision in the maxillary alveolar process on the speed of tooth movement. The null hypothesis was that the speed of tooth movement will be equal with and without piezocision. Methods All maxillary molars on one side were moved against the combined incisors in 10 ten-week-old male Wistar rats. Under general anesthesia, a force of 25 cN was applied on either side using a Sentalloy closed coil spring. After placing the orthodontic appliance, vertical corticision was performed using a piezotome under local anesthesia, 2 mm mesial from the mesial root of the first molar on a randomly selected side; the other side served as the control. At the beginning of the treatment, and 2 and 4 weeks later, skull micro-computed tomography was performed. After image reconstruction, the distance between the mesial root of the first molar and the incisive canal, and the length of the mesial root of the first maxillary molar were measured. Moreover, the root resorption score was determined as described by Lu et al. Results Significantly higher speed of tooth movement was observed on the corticision side; thus, the null hypothesis was rejected. The loss of root length and root resorption score were significantly more pronounced after piezocision than before. A strong correlation was observed between the speed of tooth movement and root resorption on the surgical side, but the control side only showed a weak correlation. Conclusions Piezocision accelerates orthodontic tooth movement and causes increased root resorption.
Collapse
Affiliation(s)
- Nikolaos Papadopoulos
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedo
| | - Nicola Beindorff
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin Experimental Radionuclide Imaging Center (BER
| | - Stefan Hoffmann
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedo
| | - Paul-Georg Jost-Brinkmann
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedo
| | - Thomas Michael Präger
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute of Dental and Craniofacial Sciences, Department of Orthodontics, Dentofacial Orthopedics and Pedo
| |
Collapse
|
2
|
Mehta S, Chen PJ, Kalajzic Z, Ahmida A, Yadav S. Acceleration of orthodontic tooth movement and root resorption with near and distant surgical insults: An in-vivo study on a rat model. Int Orthod 2021; 19:591-600. [PMID: 34716100 DOI: 10.1016/j.ortho.2021.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/03/2021] [Accepted: 10/04/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The purpose of this study was to determine the effects of alveolar decortications (AD) closer and farther from the tooth on Orthodontic tooth movement (OTM) and root resorption. MATERIALS AND METHODS Twenty-four Wistar rats (age 17 weeks) were used in the study. Three groups were formed by randomly dividing the rats into: 1) Control Group (N=8): OTM (14 days) without any surgical insult; 2) Near Group (N=8) OTM (14 days)+Alveolar Decortications (AD) adjacent to roots of the maxillary first molar; 3) Far Group (N=8) OTM (14 days)+AD 5mm away from the roots of the maxillary first molar. OTM was performed using a closed coil Nickel-Titanium (NiTi) spring to apply a mesial force on maxillary first molars of 8-10 grams. AD was performed with high-speed quarter round bur on the palatal aspect of alveolar bone. The rats were euthanized after 2 weeks of OTM and microfocus computed tomography and histological analysis were performed. RESULTS Near-AD and Far-AD groups exhibited significantly increased OTM and reduction of Bone volume fraction compared to control. The root volume was significantly decreased (increased root resorption) in the Near-AD group. Histological analysis showed no statistically significant difference between the groups. CONCLUSIONS Alveolar decortications lead to a significant increase in the rate of OTM. Increased root resorption was observed when the alveolar decortications were performed close to the maxillary molar.
Collapse
Affiliation(s)
- Shivam Mehta
- Marquette University School of Dentistry, Department of Developmental Sciences/Orthodontics, WI, Milwaukee, USA.
| | - Po-Jung Chen
- University of Connecticut Health, Division of Orthodontics, Farmington, CT, USA
| | - Zana Kalajzic
- Division of Oral Medicine, University of Connecticut, Department of Oral Health and Diagnostic Sciences, Farmington, CT, USA
| | - Ahmad Ahmida
- University of Connecticut Health, Division of Orthodontics, Farmington, CT, USA
| | - Sumit Yadav
- University of Connecticut Health, Division of Orthodontics, Farmington, CT, USA
| |
Collapse
|
3
|
Kim SG, Kook YA, Lim HJ, Park P, Lee W, Park JH, Bayome M, Kim Y. Comparison of the effects of horizontal and vertical micro-osteoperforations on the biological response and tooth movement in rabbits. Korean J Orthod 2021; 51:304-312. [PMID: 34556584 PMCID: PMC8461390 DOI: 10.4041/kjod.2021.51.5.304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/30/2020] [Accepted: 01/27/2021] [Indexed: 11/10/2022] Open
Abstract
Objective This study aimed to compare the amount of tooth movement after multiple horizontal (MH) and single vertical (SV) micro-osteoperforations (MOPs), and evaluate the histological changes after orthodontic force application in rabbits. Methods The mandibles of 24 white rabbits were subjected to two experimental interventions: MH and SV MOPs. Defect volume of the MOPs between the two groups was kept similar. A force of 100 cN was applied via a coil spring between the incisor teeth and the first premolars. The amount of tooth movement was measured. Differences in the amount of tooth movement and bone variables at three time points and between the two groups were evaluated using repeated-measures analysis of variance. Results The first premolar showed a mesial movement of 1.47 mm in the MH group and 1.84 mm in the SV group, which was significantly different at Week 3 (p < 0.05). No significant difference was observed in bone volume and bone fraction between the groups. Tartrate-resistant acidic phosphatase-positive cell count was also significantly greater at Week 3 than at Week 1 in both the SV and MH groups. Conclusions The amount of tooth movement showed significant differences between Weeks 1 and 3 in the SV and MH MOP groups, but showed no differences between the two groups. Therefore, SV MOP could be considered an effective tool for enhancing tooth movement, especially for molar distalization, uprighting, and protraction to an edentulous area.
Collapse
Affiliation(s)
- Seok-Gon Kim
- Department of Orthodontics, Graduate School of Clinical Dental Science, The Catholic University of Korea, Seoul, Korea
| | - Yoon-Ah Kook
- Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hee Jin Lim
- Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | | | - Won Lee
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea
| | - Jae Hyun Park
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, AZ, USA.,International Scholar, Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Mohamed Bayome
- Department of Preventive Dental Sciences, College of Dentistry, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia.,Department of Postgraduate Studies, Universidad Autonoma del Paraguay, Asuncion, Paraguay
| | - Yoonji Kim
- Department of Orthodontics, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| |
Collapse
|
4
|
Li Y, Zhan Q, Bao M, Yi J, Li Y. Biomechanical and biological responses of periodontium in orthodontic tooth movement: up-date in a new decade. Int J Oral Sci 2021; 13:20. [PMID: 34183652 PMCID: PMC8239047 DOI: 10.1038/s41368-021-00125-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 02/05/2023] Open
Abstract
Nowadays, orthodontic treatment has become increasingly popular. However, the biological mechanisms of orthodontic tooth movement (OTM) have not been fully elucidated. We were aiming to summarize the evidences regarding the mechanisms of OTM. Firstly, we introduced the research models as a basis for further discussion of mechanisms. Secondly, we proposed a new hypothesis regarding the primary roles of periodontal ligament cells (PDLCs) and osteocytes involved in OTM mechanisms and summarized the biomechanical and biological responses of the periodontium in OTM through four steps, basically in OTM temporal sequences, as follows: (1) Extracellular mechanobiology of periodontium: biological, mechanical, and material changes of acellular components in periodontium under orthodontic forces were introduced. (2) Cell strain: the sensing, transduction, and regulation of mechanical stimuli in PDLCs and osteocytes. (3) Cell activation and differentiation: the activation and differentiation mechanisms of osteoblast and osteoclast, the force-induced sterile inflammation, and the communication networks consisting of sensors and effectors. (4) Tissue remodeling: the remodeling of bone and periodontal ligament (PDL) in the compression side and tension side responding to mechanical stimuli and root resorption. Lastly, we talked about the clinical implications of the updated OTM mechanisms, regarding optimal orthodontic force (OOF), acceleration of OTM, and prevention of root resorption.
Collapse
Affiliation(s)
- Yuan Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qi Zhan
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Minyue Bao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jianru Yi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| | - Yu Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
| |
Collapse
|
5
|
Huang CY, Lu HP, Yu YF, Ding X, Zhang ZZ, Zhang JN. Comparison of tooth movement and biological response resulting from different force magnitudes combined with osteoperforation in rabbits. J Appl Oral Sci 2021; 29:e20200734. [PMID: 33825762 DOI: 10.1590/1678-7757-2020-0734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 12/23/2020] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To compare tooth movement rate and histological responses with three different force magnitude designs under osteoperforation in rabbit models. METHODOLOGY 48 rabbits were divided into three groups: Group A, Group B, and Group C, with traction force of 50 g, 100 g, 150 g, respectively. Osteoperforation was performed at the mesial of the right mandibular first premolar, the left side was not affected. One mini-screw was inserted into bones between two central incisors. Coil springs were fixed to the first premolars and the mini-screw. Tooth movement distance was calculated, and immunohistochemical staining of PCNA, OCN, VEGF, and TGF-β1 was analyzed. RESULTS The tooth movement distance on the surgical side was larger than the control side in all groups (P<0.01). No significant intergroup difference was observed for the surgical side in tooth movement distance among the three groups (P>0.05). For the control side, tooth movement distance in Group A was significantly smaller than Groups B and C (P<0.001); no significant difference in tooth movement distance between Group B and Group C was observed (P>0.05). On the tension area of the moving premolar, labeling of PCNA, OCN, VEGF and TGF-β1 were confirmed in alveolar bone and periodontal ligament in all groups. PCNA, OCN, VEGF and TGF-β1 on the surgical side was larger than the control side in all groups (P<0.001). CONCLUSION Osteoperforation could accelerate orthodontic tooth movement rate in rabbits. Fast osteoperforation-assisted tooth movement in rabbits was achieve with light 50 g traction.
Collapse
Affiliation(s)
- Cheng-Yi Huang
- Zhejiang University School of Medicine, Sir Run Run Shaw Hospital, Department of Dentistry, Center of Orthodontics, Hangzhou, China
| | - Hai-Ping Lu
- Zhejiang Chinese Medical University, College of Stomatology, Department of Orthodontics, Hangzhou, China
| | - Yu-Feng Yu
- Hangzhou Cancer Hospital, Department of Radiotherapy, Hangzhou, China
| | - Xi Ding
- The First Affiliated Hospital of Wenzhou Medical University, Department of Stomatology, Wenzhou, China
| | - Zan-Zan Zhang
- Zhejiang Chinese Medical University, College of Stomatology, Department of Orthodontics, Hangzhou, China
| | - Jia-Nan Zhang
- Zhejiang University School of Medicine, Sir Run Run Shaw Hospital, Department of Dentistry, Center of Orthodontics, Hangzhou, China
| |
Collapse
|
6
|
Kernitsky JR, Ohira T, Shosho D, Lim J, Bamashmous A, Dibart S. Corticotomy depth and regional acceleratory phenomenon intensity. Angle Orthod 2021; 91:206-212. [PMID: 33289837 DOI: 10.2319/041320-296.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 08/01/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To determine if the depth of corticotomy done with the piezoelectric knife could play a role in the intensity of the regional acceleratory phenomenon (RAP). MATERIALS AND METHODS Eighteen Sprague-Dawley rats were divided into two groups: untreated (3 rats) and treatment (15 rats). In the treatment group, a split-model design was used. The right tibia received transcortical (deep) penetrations with the piezoelectric knife, while intracortical (shallow) penetrations were performed on the left tibia of the same animal. The rats were euthanized at day 1, 3, 7, 14, and 28. Cone-beam computed tomography scans were taken for each sample and then assessed by histological analysis. RESULTS Higher amounts of osteoclastic activity and new collagen formation were observed in the deep penetration group when compared with the shallow penetration group. The former peaked at day 14 for both groups (1.53% ± 0.01% vs 0.03% ± 0.0004%, respectively), and the latter peaked at day 28 (0.65 × 106 ± 0.01 vs 0.08 × 106 ± 0.0008, respectively). CONCLUSIONS Within the limitations of this study, it appears that the intensity of the RAP in the rat is corticotomy depth dependent. This is to be kept in mind when decorticating the bone during surgically facilitated orthodontic procedures.
Collapse
|
7
|
Abstract
OBJECTIVE The primary objective of this study was to investigate how the extent of surgical insult affects the orthodontic tooth movement (OTM) and the alveolar bone modelling and remodelling in a rodent model. MATERIAL AND METHODS 15-week-old male Wistar rats were used in the research and they were randomly divided into three treatment groups: (1) OTM only (N = 8); (2) OTM + 2 alveolar decortication (AD) (less surgical insult) (N = 8); and (3) OTM + 4 AD (more surgical insult) (N = 8). A nickel-titanium spring delivering 5-8 g of force was used to protract the molar mesially using maxillary incisors as an anchorage. AD was done using a hand piece and a round bur, adjacent to the left first maxillary molar on the palatal alveolar bone. After 14 days of OTM Wistar rats were killed and microfocus computed tomography and histological analysis were performed. RESULTS The OTM + 4AD group presented with a significant increase (P < 0.05) in the rate of tooth movement when compared to OTM + 2AD group and OTM only group. In addition, the OTM + 4AD group had a significant decrease in bone volume and tissue density (P < 0.05) and a significant increase (P < 0.05) in the trabecular spacing and trabecular thickness when compared to OTM only. Histological quantification of tartrate-resistant acid phosphatase indicated a significant percent increase (P < 0.05) in OTM + 4AD group, when compared to OTM + 2AD and OTM only group. RESULTS Increased surgical insult increases the rate of OTM. Additionally, increased surgical insult decreases the bone volume and the tissue density.
Collapse
Affiliation(s)
- Joy Chang
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Po-Jung Chen
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Eliane H Dutra
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Ravindra Nanda
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Sumit Yadav
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA
| |
Collapse
|
8
|
Ji Y, Tang Y, Wu Q, Huang D, Zhu J, Kang F. The effects of mandibular osteotomy on maxillary orthodontic tooth movement and bone remodelling in a rat model. Eur J Orthod 2020; 43:467-472. [PMID: 32929502 DOI: 10.1093/ejo/cjaa053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES The accelerated tooth movement phenomenon after orthognathic surgery has been observed. However, the underlying mechanism remains unclear. There is no experimental study showing the effect of orthognathic surgery on orthodontic tooth movement of the opposing jaw. Therefore, the present study aimed at investigating if mandibular osteotomy enhances maxillary tooth movement and bone remodelling. MATERIALS AND METHODS Fifty-four male Sprague-Dawley rats were randomly divided into two groups: maxillary tooth movement (TM) and maxillary tooth movement + mandibular surgery (TM + MS). The orthodontic force was delivered to move the left maxillary first molar mesially. The surgical intervention was performed on the left mandible. Microcomputed tomography, histological analysis, enzyme-linked immunosorbent assay, and quantitative real-time polymerase chain reaction were used to assess changes at 3, 7, and 21 days after surgery. RESULTS The mandibular osteotomy accelerates the rate of maxillary tooth movement with decreased bone volume fraction on the seventh day. Bone resorption was observed on the third and seventh day after mandibular osteotomy. It was found that serum interleukin-1β level increased significantly in the TM + MS group compared with the TM group, as well as the high expression level of cathepsin K and tumour necrosis factor receptor-associated factor 5 of the orthodontic tooth on the third and seventh day after mandibular osteotomy. CONCLUSION Data from the present study suggested that mandibular osteotomy accelerates maxillary osteoclast activity and post-operative tooth movement, providing evidence for accelerated tooth movement phenomenon after orthognathic surgery.
Collapse
Affiliation(s)
- Yingchen Ji
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| | - Yi Tang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| | - Qing Wu
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| | - Danqing Huang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| | - Jie Zhu
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| | - Feiwu Kang
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Tongji University, Shanghai.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, China
| |
Collapse
|
9
|
Zuppardo ML, Santamaria M, Ferreira CL, Longo M, Cirelli JA, Santamaria MP, Jardini MAN. Effect of two corticotomy protocols on periodontal tissue and orthodontic movement. J Appl Oral Sci 2020; 28:e20190766. [PMID: 32638830 PMCID: PMC7340209 DOI: 10.1590/1678-7757-2019-0766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/19/2020] [Indexed: 11/25/2022] Open
Abstract
Objective To compare two corticotomy surgical protocols in rats to verify whether they alter conventional orthodontic movement. Methodology Sixty Wistar rats were divided into three groups – orthodontic movement (CG), orthodontic movement and corticotomy (G1) and orthodontic movement with corticotomy and decortication (G2) – and euthanized after 7 and 14 days. Tooth movement (mm), bone volume fraction and bone volume ratio to total volume (BV/TV), and bone mineral density (BMD) were evaluated by micro-CT. The total amount of bone was measured in square millimeters and expressed as the percentage of bone area in the histomorphometry. The number of positive TRAP cells and RANK/RANKL/OPG interaction were also investigated. Results Day 14 showed a statistically significant difference in orthodontic tooth movement in CG compared with G1 (7.52 mm; p=0.009) and G2 (7.36 mm; p=0.016). A micro-CT analysis revealed a difference between CG, G1 and G2 regarding BV/TV, with G1 and G2 presenting a lower BV/TV ratio at 14 days (0.77 and 0.73 respectively); we found no statistically significant differences regarding BMD. There was a difference in the total amount of bone in the CG group between 7 and 14 days. At 14 days, CG presented a significantly higher bone percentage than G1 and G2. Regarding TRAP, G2 had more positive cells at 7 and 14 days compared with CG and G1. Conclusion Corticotomy accelerates orthodontic movement. Decortication does not improve corticotomy efficiency.
Collapse
Affiliation(s)
| | - Milton Santamaria
- Programa de Pós-Graduação em Ortodontia, Centro Universitário Hermínio Ometto, UNIARARAS, Araras, Brasil
| | | | - Mariéllen Longo
- Universidade Estadual Paulista, São José dos Campos, São Paulo, Brasil
| | - Joni Augusto Cirelli
- Faculdade de Odontologia, Universidade Estadual Paulista, Araraquara, São Paulo, Brasil
| | | | | |
Collapse
|
10
|
Babanouri N, Ajami S, Salehi P. Effect of mini-screw-facilitated micro-osteoperforation on the rate of orthodontic tooth movement: a single-center, split-mouth, randomized, controlled trial. Prog Orthod 2020; 21:7. [PMID: 32147751 PMCID: PMC7061095 DOI: 10.1186/s40510-020-00306-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 02/10/2020] [Indexed: 03/29/2023] Open
Abstract
Objective The present study aimed to evaluate the effect of MOP over a 3-month period and to determine the influence of the number of perforations on the rate of canine retraction. In addition, the amount of pain and discomfort caused by the MOP method was evaluated. Trial design A single-center, split-mouth, triple-blind, randomized, controlled trial was conducted. Methods The clinical trial was conducted from December 2018 to July 2019 in the Orthodontic Clinic, Shiraz Dental School. Twenty-eight patients (range from16.3 to 35.2 years) who need fixed orthodontic treatment were recruited and randomly assigned to MOP1 and MOP2 groups. In each patient one side of the mouth worked as a control side which received no MOPs. Four months after first premolars extraction, patients in MOP1 group received 3 MOPs on the buccal surface of alveolar bone in the experimental side to accelerate canine retraction whereas patients in MOP2 group received 3 buccal MOPs and 3 palatal MOPs in the experimental side. The amount of canine retraction was measured every 28 days at three intervals on both sides of the mouth. Pain perception was also measured on the day of MOP procedure and subsequently at 24 h. Randomization was performed using online software RANDOM.ORG; the recruited patients were divided into two parallel groups with a 1:1 allocation ratio then the side of MOPs intervention in each subject was randomly determined with coin tossing. Triple blinding design was employed. Results The result of the intra-examiner reliability using ICC was 0.97 (P < 0.001), indicating excellent repeatability and reliability of the measurements. The baseline characteristics between the groups were similar (P > 0.05). There was a significant difference in the rate of canine retraction between the MOP groups and the contralateral control sides, as well as between the MOP1 and MOP2 groups (P < 0.05). Conclusion The MOP procedure was effective in accelerating orthodontic tooth movement, although the amount of acceleration was not clinically significant in the case of canine retraction. An increase in the number of MOPs resulted in a significant acceleration of the canine retraction. Trial registration The trial was registered 30 November 2018 at the Iranian Registry of Clinical Trials (IRCT20181121041713N1).
Collapse
Affiliation(s)
- Neda Babanouri
- Orthodontic Research Center, School of Dentistry, Shiraz University of Medical Sciences, Qom Abad, Ghasrodasht St, Shiraz, 713451836, Iran
| | - Shabnam Ajami
- Orthodontic Research Center, School of Dentistry, Shiraz University of Medical Sciences, Qom Abad, Ghasrodasht St, Shiraz, 713451836, Iran.
| | - Parisa Salehi
- Orthodontic Research Center, School of Dentistry, Shiraz University of Medical Sciences, Qom Abad, Ghasrodasht St, Shiraz, 713451836, Iran
| |
Collapse
|
11
|
Charavet C, Van Hede D, Anania S, Maes N, Lambert F. Multilevel biological responses following piezocision to accelerate orthodontic tooth movement: A study in rats. J World Fed Orthod 2019. [DOI: 10.1016/j.ejwf.2019.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
12
|
Zou M, Li C, Zheng Z. Remote Corticotomy Accelerates Orthodontic Tooth Movement in a Rat Model. Biomed Res Int 2019; 2019:4934128. [PMID: 31317031 DOI: 10.1155/2019/4934128] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 03/11/2019] [Accepted: 05/20/2019] [Indexed: 02/08/2023]
Abstract
Introduction With an increasing demand for orthodontic treatment for adult patients, orthodontic professionals are constantly seeking novel strategies and technologies that can accelerate tooth movement in order to shorten the treatment period. For instance, in recent years, the influences of different surgical techniques on orthodontic tooth movement in the ipsilateral side of surgery were intensively investigated. Here, we attempt to examine if corticotomy could also affect the rate of tooth movement in the contralateral side of the surgery by using a rodent model. Materials and Methods 72 eight-week-old Sprague-Dawley rats were randomly divided into three groups as follows: the Control group (orthodontic treatment devices delivered only, no tooth movement), the orthodontic tooth movement (OTM) group (orthodontic treatment devices delivered and orthodontic treatment performed), and the Corticotomy + OTM group (remote corticotomy performed, orthodontic treatment devices delivered, followed by orthodontic treatment). The surgical procedure was conducted on the right side of the maxilla at the time of appliance placement and a force of 60 g was applied between the maxillary left first molar and maxillary incisors using nickel-titanium springs to stimulate OTM. The OTM distance and speed were tracked at 3, 7, 14, and 28 days post-surgery, followed by histological and immunohistochemical assessments. Results In comparison with orthodontic treatment only, the contralateral corticotomy significantly accelerated OTM. Furthermore, animals undergoing corticotomy + OTM presented with a greater number of osteoclasts on the compression side, stronger staining of the osteogenic marker on the tension side, and higher expression of an inflammatory marker than the OTM group animals. Conclusion Our current study demonstrates that remote corticotomy effectively accelerates alveolar bone remodeling and OTM. The study enriches our understanding of the regional acceleratory phenomenon (RAP) and offers an alternative strategy for accelerating OTM to shorten the orthodontic treatment period.
Collapse
|
13
|
Zuppardo ML, Ferreira CL, de Moura NB, Longo M, Santamaria M Jr, Lopes SLPC, Santamaria MP, Jardini MAN. Macroscopic and radiographic aspects of orthodontic movement associated with corticotomy: animal study. Oral Maxillofac Surg 2019; 23:77-82. [PMID: 30710180 DOI: 10.1007/s10006-019-00744-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 01/25/2019] [Indexed: 12/20/2022]
Abstract
INTRODUCTION To quantify the rate of tooth movement in two corticotomy protocols in an experimental model in rats through macroscopic and radiographic analysis. METHODS The animals were divided into three groups: orthodontic movement (CO), orthodontic movement plus corticotomy surgery (G2), and orthodontic movement and corticotomy surgery with decorticalization (G3).The euthanasia occurred in 7 and 14 days. The data were statistically analyzed (p < 0.05). RESULTS The CO presented lower distance between the mesial surface of the first molar and the distal surface of the third molar when compared to the G2 (6.96 ± 0.24, p = 0.009) and G3 (6.93 ± 0.18, p = 0.016) in the macroscopic analysis. In the 7 days, there was no statistically significant radiographic difference between the three groups: CO(0.94 ± 0.21 mm2), G2(1.05 ± 0,27 mm2), and G3(1.08 ± 0.27 mm2).There was a statistically significant difference between CO (0.87 ± 0.12 mm2), G2 (1.00 ± 0.12 mm2), and G3 (1.11 ± 0.14 mm2) at 14 days. There was a statistically significant linear difference between the groups in all periods. CONCLUSION Tooth movement and the region of interest were influenced by corticotomy, regardless of the surgical technique in the 14 days.
Collapse
|
14
|
Dutra EH, Ahmida A, Lima A, Schneider S, Nanda R, Yadav S. The effects of alveolar decortications on orthodontic tooth movement and bone remodelling in rats. Eur J Orthod 2019; 40:423-429. [PMID: 29092027 DOI: 10.1093/ejo/cjx080] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Objectives Alveolar decortication (AD) is a minimally invasive procedure that can be performed in the orthodontic office as an intervention to accelerate tooth movement. There is a gap in the literature evaluating the earlier and delayed responses after AD using lighter orthodontic forces in a rat model. Therefore, the aim of this study was to determine the effects of AD in the amount of orthodontic tooth movement and on alveolar bone remodelling in a rodent model, after 7 or 14 days. Materials and methods A total of 32 15-week-old male Wistar rats were used in four treatment groups: (1) orthodontic spring only (7 days), (2) orthodontic spring only + AD (7 days), (3) orthodontic spring only (14 days), and (4) orthodontic spring only + AD (14 days). A closed coil nickel-titanium spring delivering 8-10 g of force was used to move the molar mesially. Alveolar decortication was done using a high speed, quarter round bur adjacent to the left first maxillary molar, on the palatal alveolar bone. At each endpoint, rats were sacrificed and microfocus computed tomography and histological analysis were performed. Results The spring + AD group presented with a significant increase in the rate of tooth movement when compared with spring only group, 7 and 14 days after the beginning of the experiments. In addition, the spring + AD group had a significant decrease in bone volume and tissue density and a significant increase in the trabecular spacing and the number of osteoclasts at 7 and 14 days. Furthermore, a fibrous tissue was found to replace the alveolar bone in the spring + AD group at day 14. Conclusion Alveolar decortications enhanced bone remodelling around the tooth movement region and could be used as an adjunct surgical procedure to accelerate the rate of tooth movement.
Collapse
Affiliation(s)
- Eliane H Dutra
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - Ahmad Ahmida
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - Alexandro Lima
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - Sydney Schneider
- School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, USA
| | - Ravindra Nanda
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| | - Sumit Yadav
- Division of Orthodontics, University of Connecticut Health Center, Farmington, CT, USA
| |
Collapse
|
15
|
Zhou X, Gan Y, Xiong J, Zhang D, Zhao Q, Xia Z. A Method for Tooth Model Reconstruction Based on Integration of Multimodal Images. J Healthc Eng 2018; 2018:4950131. [PMID: 30026903 DOI: 10.1155/2018/4950131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 05/07/2018] [Indexed: 12/02/2022]
Abstract
A complete digital tooth model is needed for computer-aided orthodontic treatment. However, current methods mainly use computed tomography (CT) images to reconstruct the tooth model which may require multiple CT scans during orthodontic progress, and the reconstructed model is also inaccurate in crown area. This study developed a tooth model reconstruction method based on integration of CT images and laser scan images to overcome these disadvantages. In the method, crown models and complete tooth models are first reconstructed, respectively, from laser scan images and CT images. Then, crown models from laser scan images and tooth models from CT images are registered. Finally, the crown from laser scan images and root from CT images were fused to obtain a new tooth model. Experimental results verified that the developed method is effective to generate the complete tooth model by integrating CT images and laser scan images. Using the proposed method, the reconstructed models provide more accurate crown than CT images, and it is feasible to obtain complete tooth models at any stage of orthodontic treatment by using one CT scan at the pretreatment stage and one laser scan at that stage to avoid multiple CT scans.
Collapse
|
16
|
|