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Merati M, Ghaffari H, Javid F, Ahrari F. Success rates of single-thread and double-thread orthodontic miniscrews in the maxillary arch. BMC Oral Health 2024; 24:191. [PMID: 38317101 PMCID: PMC10845463 DOI: 10.1186/s12903-024-03866-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 01/05/2024] [Indexed: 02/07/2024] Open
Abstract
AIM There is limited research on the clinical performance of double-thread orthodontic miniscrews. This study aimed to compare the stability of double-thread and single-thread orthodontic miniscrews and identify the potential associations between patient-related and location-related factors with miniscrew stability. METHODS This retrospective cohort study involved 90 orthodontic miniscrews (45 single-thread, 45 double-thread) with identical dimensions (8 mm length, 1.6 mm diameter). The screws were inserted in various locations within the upper jaw of 83 patients (54 females, 29 males; mean age = 15.1 ± 2.4 years). Failure was defined as excessive mobility or loss of miniscrew after placement. The data recorded were patient age, gender, insertion site, side of insertion (buccal or lingual), duration of force application, and failure occurrence. RESULTS The overall success rate within the sample was 92.2%. Double-thread miniscrews exhibited a significantly higher success rate than single-thread miniscrews (P = 0.049), with 97.8% and 86.7% success rates, respectively. Gender, age, insertion location, and side of insertion did not show significant associations with failure (P > 0.05). Log-rank analysis revealed a significant difference between the two groups (P = 0.046), indicating a higher probability of survival for the double-thread design. CONCLUSIONS The overall success rate of orthodontic miniscrews was high in the present sample. Double-thread miniscrews placed in various locations within the maxillary arch demonstrated superior stability and survival rates compared to their single-thread counterparts. Therefore, double-thread miniscrews may be preferred when bone quality is inadequate, such as in young patients.
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Affiliation(s)
- Mohsen Merati
- Department of Orthodontics, School of Dentistry, Shahed University, Tehran, Iran
| | - Hassanali Ghaffari
- Department of Orthodontics, School of Dentistry, Shahed University, Tehran, Iran
| | - Fatemeh Javid
- School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
| | - Farzaneh Ahrari
- Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Vakilabad Blvd, Mashhad, Iran.
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Riad Deglow E, Zubizarreta-Macho Á, González Menéndez H, Lorrio Castro J, Galparsoro Catalán A, Tzironi G, Lobo Galindo AB, Alonso Ezpeleta LÓ, Hernández Montero S. Comparative analysis of two navigation techniques based on augmented reality technology for the orthodontic mini-implants placement. BMC Oral Health 2023; 23:542. [PMID: 37543581 PMCID: PMC10403882 DOI: 10.1186/s12903-023-03261-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 07/28/2023] [Indexed: 08/07/2023] Open
Abstract
To analyze and compare the accuracy and root contact prevalence, comparing a conventional freehand technique and two navigation techniques based on augmented reality technology for the orthodontic self-drilling mini-implants placement. Methods Two hundred and seven orthodontic self-drilling mini-implants were placed using either a conventional freehand technique (FHT) and two navigation techniques based on augmented reality technology (AR TOOTH and AR SCREWS). Accuracy across different dental sectors was also analyzed. CBCT and intraoral scans were taken both prior to and following orthodontic self-drilling mini-implants placement. The deviation angle and horizontal were then analyzed; these measurements were taken at the coronal entry point and apical endpoint between the planned and performed orthodontic self-drilling mini-implants. In addition, any complications resulting from mini-implant placement, such as spot perforations, were also analyzed across all dental sectors.Results The statistical analysis showed significant differences between study groups with regard to the coronal entry-point (p < 0.001), apical end-point(p < 0.001) and angular deviations (p < 0.001). Furthermore, statistically significant differences were shown between the orthodontic self-drilling mini-implants placement site at the coronal entry-point (p < 0.0001) and apical end-point (p < 0.001). Additionally, eight root perforations were observed in the FHT group, while there were no root perforations in the two navigation techniques based on augmented reality technology.Conclusions The navigation techniques based on augmented reality technology has an effect on the accuracy of orthodontic self-drilling mini-implants placement and results in fewer intraoperative complications, comparing to the conventional free-hand technique. The AR TOOTH augmented reality technique showed more accurate results between planned and placed orthodontic self-drilling mini-implants, comparing to the AR SCREWS and conventional free-hand techniques. The navigation techniques based on augmented reality technology showed fewer intraoperative complications, comparing to the conventional free-hand technique.
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Affiliation(s)
- Elena Riad Deglow
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
| | - Álvaro Zubizarreta-Macho
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
- Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, 37008 Salamanca, Spain
| | - Héctor González Menéndez
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
| | - Juan Lorrio Castro
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
| | - Agustín Galparsoro Catalán
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
| | - Georgia Tzironi
- Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, 37008 Salamanca, Spain
| | - Ana Belén Lobo Galindo
- Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, 37008 Salamanca, Spain
| | | | - Sofía Hernández Montero
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Avda Universidad, 1. 28691, Villanueva de La Cañada, Madrid, Spain
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Mihit Mihit FZ, Zubizarreta-Macho Á, Montiel-Company JM, Albaladejo Martínez A. Systematic review and network meta-analysis of the accuracy of the orthodontic mini-implants placed in the inter-radicular space by image-guided-based techniques. BMC Oral Health 2023; 23:383. [PMID: 37308848 DOI: 10.1186/s12903-023-03079-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/21/2023] [Accepted: 05/25/2023] [Indexed: 06/14/2023] Open
Abstract
OBJECTIVE The aim of the present systematic review and network meta-analysis (NMA) is to analyze the accuracy of image-guided-based orthodontic mini-implants placement techniques in the inter-radicular space. METHODS The study was conducted under the PRISMA recommendations. Three databases were searched up to July 2022. In vitro randomized experimental trials (RETs) including static computer-aided implant surgery (s-CAIS), mixed reality (MR), soft tissue static computer-aided implant surgery (ST s-CAIS) and conventional free-hand technique (FHT) for the orthodontic mini-implants placement in the inter-radicular space were selected. The risk of bias was assessed using the Current Research Information System scale. A random effects model was used in the NMA. Direct comparisons were combined with a random effects model in a frequentist NMA to estimate indirect comparisons, and the estimated effect size of the comparisons between techniques were analyzed by difference of means. Inconsistency was assessed with the Q test, with a significance level of p < 0.05, and a net heat plot. RESULTS A total of 92 articles was identified, and 8 RETs (8 direct comparisons of 4 techniques) were included in the NMA, which examined 4 orthodontic mini-implants placement techniques: s-CAIS, MR, ST s-CAIS, and FHT. Taking FHT as reference, s-CAIS and ST s-CAIS showed statistically significant coronal and apical deviation. In addition, s-CAIS showed statistically significant angular deviation. However, MR did not show statistically significant differences with respect to FHT, which presented the highest p-score. At the coronal deviation, ST s-CAIS presented the highest P-score (0.862), followed by s-CAIS (0.721). At the apical deviation, s-CAIS presented the highest P-score (0.844), followed by ST s-CAIS (0.791). Finally, at the angular deviation s-CAIS presented again the highest P-score (0.851). CONCLUSIONS Within the limitations of this study, it was found that the image-guided-based orthodontic mini-implants placement techniques showed more accuracy than the free-hand conventional placement technique; specially the computer-aided static navigation techniques for the orthodontic mini-implants placed in the inter-radicular space.
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Affiliation(s)
- Fatima Zahrae Mihit Mihit
- Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, 37008, Salamanca, Spain
| | - Álvaro Zubizarreta-Macho
- Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, 37008, Salamanca, Spain.
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, 28691, Madrid, Spain.
| | - José María Montiel-Company
- Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, 46010, Valencia, Spain
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Sinha SP, Bajracharya M, Huang CS, Ko EWC. Does the floor of the maxillary sinus affect tooth movement for premolar extraction space closure? Clin Oral Investig 2023; 27:299-304. [PMID: 36104604 DOI: 10.1007/s00784-022-04723-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/14/2022] [Accepted: 09/06/2022] [Indexed: 02/01/2023]
Abstract
OBJECTIVE The study investigated orthodontic tooth movement by comparing various horizontal and angular measures of the teeth having different sinus-root relationship (SRR) of patients undergoing first premolar extraction treatment protocols. MATERIALS AND METHODS This retrospective cross-sectional study included 45 Taiwanese adult patients, classified as the control group (n = 15) and the sinus group (n = 30) according to SRR. The control group had type I SRR (sinus floor above the level connecting the buccal and palatal root apices), whereas the sinus group included patients with type V SRR (the buccal and palatal root displayed apical protrusion into the sinus floor). Morphology was identified using pretreatment orthopantomograms. Lateral cephalometric measurements were conducted before treatment (T1) and at debonding (T2). RESULTS Post debonding, there were no statistically significant difference in the two groups. However, the incisors in the control group became marginally more upright than those of the sinus group, and the molars demonstrated tipping movement with minimal anchorage loss in the sinus group than in the control group. The total treatment time was not significantly different between the 2 groups. CONCLUSION The study revealed that the sinus-root relationship does not affect the orthodontic tooth movement. However, a more extensive 3-D study with larger sample size is strongly recommended before coming to any conclusion. CLINICAL RELEVANCE The lining of the floor of the maxillary sinus does not affect the orthodontic tooth movement.
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Affiliation(s)
- Suraj Prasad Sinha
- Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Manish Bajracharya
- Dental Department, Orthodontic Unit, National Academy of Medical Sciences, Bir Hospital, Kathmandu, Nepal
| | - Chiung-Shing Huang
- Graduate Institute of Craniofacial and Dental Science, Chang Gung University, Taoyuan, Taiwan.,Department of Craniofacial Orthodontic, Chang Gung Memorial Hospital, 6F, 199, Tung Hwa North Road, Taipei, 105, Taiwan
| | - Ellen Wen-Ching Ko
- Graduate Institute of Craniofacial and Dental Science, Chang Gung University, Taoyuan, Taiwan. .,Department of Craniofacial Orthodontic, Chang Gung Memorial Hospital, 6F, 199, Tung Hwa North Road, Taipei, 105, Taiwan. .,Department of Dentistry, Chang Gung Memorial Hospital, Linkous, Taiwan.
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An JS, Seo BY, Ahn SJ. Comparison of dentoskeletal and soft tissue changes between tooth-borne and tooth-bone-borne hybrid nonsurgical rapid maxillary expansions in adults: a retrospective observational study. BMC Oral Health 2021; 21:658. [PMID: 34922526 PMCID: PMC8684621 DOI: 10.1186/s12903-021-02008-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 12/03/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Despite the gradual increase in the use of rapid maxillary expansion (RME), specifically RME with the aid of skeletal anchorage in adults, there have been no reports comparing dentoskeletal and soft tissue changes between nonsurgical tooth-borne and tooth-bone-borne RMEs in adults. This study aimed to analyse differences in dentoskeletal and soft tissue changes between tooth-borne and tooth-bone-borne RMEs using a similar appliance design and the same expansion protocol in adult patients. METHODS Twenty-one patients with tooth-borne expansion (a conventional expansion screw with two premolars and two molar bands for dental anchorage [T-RME]) and the same number of patients with tooth-bone-borne hybrid expansion (a conventional expansion screw with two premolar and two molar bands for dental anchorage and four mini-implants in the palate for skeletal anchorage [H-RME]) were included. Dentoskeletal and soft tissue variables at pretreatment (T1) and after expansion (T2) were measured using posteroanterior and lateral cephalograms and frontal photographs. The sex distribution of the two groups was analysed using the chi-square test, and the change after RME in each group was evaluated using the Wilcoxon signed-rank test. Differences in pretreatment age, expansion duration, post-expansion duration, and dentoskeletal and soft tissue changes after RME between the two groups were determined using the Mann-Whitney U test. RESULTS There were no significant differences in the expansion protocol, pretreatment conditions, and sex distribution between the two groups. Despite similar degrees of dental expansion at the crown level between the two groups, H-RME induced increased skeletal and parallel expansion of the maxilla compared to T-RME. After expansion, H-RME demonstrated increased forward displacement of the maxilla without significant changes in the vertical dimension, while T-RME exhibited increased backward displacement of the mandible, increased vertical dimension, and decreased overbite. Both groups showed significant retroclination and extrusion of the maxillary incisors without significant intergroup differences. There were no significant soft tissue changes between the two groups. CONCLUSION This study suggests that using skeletal anchorage in RME may induce increased skeletal and parallel expansion of the maxilla without significant effects on the vertical dimension.
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Affiliation(s)
- Jung-Sub An
- Department of Orthodontics, Seoul National University Dental Hospital, 101, Deahak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Bo-Yeon Seo
- Department of Orthodontics, School of Dentistry, Dental Research Institute, Seoul National University, 101, Deahak-ro, Jongno-gu, Seoul, 03080, Republic of Korea
| | - Sug-Joon Ahn
- Department of Orthodontics, School of Dentistry, Dental Research Institute, Seoul National University, 101, Deahak-ro, Jongno-gu, Seoul, 03080, Republic of Korea.
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Barros SE, Vanz V, Chiqueto K, Janson G, Ferreira E. Mechanical strength of stainless steel and titanium alloy mini-implants with different diameters: an experimental laboratory study. Prog Orthod 2021; 22:9. [PMID: 33748887 PMCID: PMC7982375 DOI: 10.1186/s40510-021-00352-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 10/27/2020] [Accepted: 02/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The mechanical strength of mini-implants is a critical factor due to their small diameters. Currently, it is not possible to state whether there is a relevant difference between the mechanical properties of stainless steel (SS-MIs) and titanium alloy mini-implants (TA-MIs). The objective of this study was to test the null hypothesis that there is no difference in the mechanical strength of SS-MIs and TA-MIs, and to analyze, by scanning electron microscopy (SEM), the SS-MI, and TA-MI threads resistance to morphological damage after insertion. METHODS A standardized sample of 504 SS-MIs and TA-MIs with diameters ranging from 1.2 mm to 1.8 mm was used. Torsional fracture was performed in 154 MIs. Flexural strength of 280 MIs was evaluated at 1 mm and 2 mm-deflection. The threads of 70 MIs were morphologically analyzed by scanning electron microscopy (SEM), before and after their insertion in high-density artificial bone blocks. Comparisons between SS-MIs and TA-MIs were performed with t tests or Mann-Whitney U tests. A multiple linear regression analysis was used to evaluate the influence of variables on the ranging of MI mechanical strength. RESULTS SS-MIs had higher fracture torque. The mean difference between the SS-MIs and TA-MIs fracture torque was of 4.09 Ncm. The MI diameter explained 90.3% of the total variation in fracture torque, while only 2.2% was explained by the metallic alloy. The SS-MI group presented a higher deformation force during the 1mm and 2mm-deflection. The mean difference between the flexural strength of SS and TA-MIs at 1 mm and 2 mm-deflection was of 18.21 N and 17.55 N, respectively. There was no noticeable morphological damage to the threads of SS-MIs and TA-MIs. CONCLUSIONS The null hypothesis was rejected. SS-MIs were 13.2% and 20.2% more resistant to torsional fracture and deflection, respectively. The threads of the SS-MIs and TA-MIs were not damaged during the insertion and removal process. Thus, the use of SS-MI can reduce the fracture risk without increasing the MI diameter.
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Affiliation(s)
- Sérgio Estelita Barros
- Division of Orthodontics, Faculty of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Porto Alegre, RS, 90035-003, Brazil.
| | - Viviane Vanz
- Division of Orthodontics, Faculty of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Porto Alegre, RS, 90035-003, Brazil
| | - Kelly Chiqueto
- Division of Orthodontics, Faculty of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Porto Alegre, RS, 90035-003, Brazil
| | - Guilherme Janson
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Alameda Octávio Pinheiro Brisolla 9-75, Bauru, SP, 17012-901, Brazil
| | - Eduardo Ferreira
- Division of Orthodontics, Faculty of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos 2492, Porto Alegre, RS, 90035-003, Brazil
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Baik HS, Kang YG, Choi YJ. Miniscrew-assisted rapid palatal expansion: A review of recent reports. J World Fed Orthod 2020; 9:S54-S58. [PMID: 33023733 DOI: 10.1016/j.ejwf.2020.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 08/09/2020] [Accepted: 08/12/2020] [Indexed: 10/23/2022]
Abstract
The miniscrew-assisted rapid palatal expander (MARPE) has extended not only skeletal effects with fewer dental changes and but also the age limit of nonsurgical maxillary expansion treatment. Amid its gaining popularity in clinical orthodontics, our current understanding of treatment effectiveness, efficiency, and stability needs to be reassessed. In this review article, the authors have attempted to evaluate MARPE from various aspects with a focus on recent studies.
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Affiliation(s)
- Hyoung-Seon Baik
- Department of Orthodontics, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea
| | - Yoon-Goo Kang
- Department of Orthodontics, Kyung Hee University, Seoul, Korea
| | - Yoon Jeong Choi
- Department of Orthodontics, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, Korea
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Ghafari JG, Macari AT, Zeno KG, Haddad RV. Potential and limitations of orthodontic biomechanics: recognizing the gaps between knowledge and practice. J World Fed Orthod 2020; 9:S31-9. [PMID: 33023730 DOI: 10.1016/j.ejwf.2020.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 11/22/2022]
Abstract
The perennial goals of efficient biomechanics are to obtain more controlled and faster movement and using more discrete appliances. The most recent technological advances have buttressed these goals. Temporary anchorage devices have revolutionized orthodontic practice and loom as a solid cornerstone of orthodontic science, along with the use of light forces, facilitated by "smart" archwires for optimal tooth movement. Accelerated tooth movement with decortication has been successful because of decreasing the resistance of cortical bone but micro-osteoperforation has not matched the same results. Clear aligners and preprogrammed regular or lingual appliances reflect the importance of three-dimensional technology in appliance design based on treatment outcome. These mechanical developments have inched the science closer to the traditional goals, but advances lack regarding their enhancement by biomaterials in a system where the physical stimulus is exerted on the teeth but the expression of tooth displacement is through the biological processes within the surrounding tissues. In this article, present tenets, applications, and advances are explored along with the gaps between knowledge and practice and the possibilities to bridge them. Anchorage control remains the major widely used development but slower is the development of faster noninvasive treatment.
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Ye YS, Yi WM, Zhuang PL, Liu M, Yu YS, Lu YJ, Yao QH, Wang W, Chang SH. Thread shape affects the stress distribution of torque force on miniscrews: a finite element analysis. Comput Methods Biomech Biomed Engin 2020; 23:1034-1040. [PMID: 32619356 DOI: 10.1080/10255842.2020.1784884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study aimed to investigate the effect of miniscrews thread shape on the stress distribution receiving a torque load. Seven thread shapes (S,V1,V2,B1,B2,R1,R2) models were constructed and a 6 Nmm-torque load was applied. The order of maximum equivalent stress (EQV) value was V1 > V2 > B1 > R1 > R2 > B2 > S. The order of maximum displacement of miniscrew (Max DM) value was S > B2 > R1 = V1 > B1 > V2 > R2. Model R2 may be the most appropriate thread shape affording a torque force.
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Affiliation(s)
- Yu-Shan Ye
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wei-Min Yi
- Department of Integrative medicine, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Pei-Lin Zhuang
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Mo Liu
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yan-Song Yu
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ying-Juan Lu
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Qing-He Yao
- School of Engineering, Sun Yat-sen University, Guangzhou, China
| | - Wei Wang
- Urumqi DW Innovation Info Tech Co., Ltd, Urumqi, China
| | - Shao-Hai Chang
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
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Abstract
OBJECTIVES To evaluate the premise that skeletal anchorage with SAS miniplates are highly successful and predictable for a range of complex orthodontic movements. MATERIALS AND METHODS This retrospective cross-sectional analysis consisted of 421 bone plates placed by one clinician in 163 patients (95 female, 68 male, mean age 29.4 years ± 12.02). Simple descriptive statistics were performed for a wide range of malocclusions and desired movements to obtain success, complication, and failure rates. RESULTS The success rate of skeletal anchorage system miniplates was 98.6%, where approximately 40% of cases experienced mild complications. The most common complication was soft tissue inflammation, which was amenable to focused oral hygiene and antiseptic rinses. Infection occurred in approximately 15% of patients where there was a statistically significant correlation with poor oral hygiene. The most common movements were distalization and intrusion of teeth. More than a third of the cases involved complex movements in more than one plane of space. CONCLUSIONS The success rate of skeletal anchorage system miniplates is high and predictable for a wide range of complex orthodontic movements.
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Krishnan S, Pandian S, Kumar S A. Effect of bisphosphonates on orthodontic tooth movement-an update. J Clin Diagn Res 2015; 9:ZE01-5. [PMID: 26023659 DOI: 10.7860/jcdr/2015/11162.5769] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 09/09/2014] [Accepted: 01/23/2015] [Indexed: 11/24/2022]
Abstract
Bisphosphonates are a synthetic class of pyrophosphate analogues that are powerful inhibitors of bone resorption which are commonly used as a medication for the prevention and therapy of osteoporosis and osteopenia, also used to treat tumor diseases. As it affects bone metabolism, it is said to have an influence on orthodontic treatment and tooth movement. Also, this review gives an insight into the reported effects of Bisphosphonate medication in literature highlighting the status quo of scientific research regarding effects of Bisphosphonates on orthodontic tooth movement. A systematic literature search was done in Medline database (Pubmed) for the appropriate keywords. Manual handsearch was also done. From the available evidence it can be concluded that the duration of orthodontic treatment is increased for patients under Bisphosphonate therapy as they interfere with the osteoclastic resorption. However, they may be beneficial for anchorage procedures. Further long term prospective randomized controlled trials are required to assess possible benefits and adverse effects of bisphosphonate treatment, before Bisphosphonates can be therapeutically used in orthodontics.
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Affiliation(s)
- Sindhuja Krishnan
- Post Graduation, Department of Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College, Saveetha, University , Chennai, Tamilnadu, India
| | - Saravana Pandian
- Post Graduation, Department of Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College, Saveetha, University , Chennai, Tamilnadu, India
| | - Aravind Kumar S
- Professor, Department of Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College, Saveetha, University , Chennai, Tamilnadu, India
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Al-Duliamy MJ, Ghaib NH, Kader OA, Abdullah BH. Enhancement of orthodontic anchorage and retention by the local injection of strontium: An experimental study in rats. Saudi Dent J 2015; 27:22-9. [PMID: 25544811 PMCID: PMC4273278 DOI: 10.1016/j.sdentj.2014.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 03/20/2013] [Revised: 03/30/2014] [Accepted: 08/27/2014] [Indexed: 01/27/2023] Open
Abstract
OBJECTIVES To examine the clinical and histological effects of locally injected strontium on the anchoring unit of a rat model of an experimental relapsed tooth movement. MATERIALS AND METHODS Thirty-six 10-week-old male Wister rats were randomly divided into two groups of 18 animals that were then randomly divided into three subgroups of six animals corresponding to three observation periods: T1 = 1 week, T2 = 2 weeks, and T3 = 3 weeks. In the first experiment, both the right and left maxillary first molars were moved buccally with a standardized expansive spring. Strontium chloride solution was injected every 2 days into the subperiosteal area buccal to the left maxillary first molar (the experimental side). The right-sided first molar was injected with distilled water as a control. In the second experiment, maxillary first molars were moved buccally with the spring. After 3 weeks, the spring was removed. Two days before the spring removal, strontium chloride was injected into the palatal side of left-sided maxillary first molar and distilled water was injected into the palatal side of the right-sided maxillary first molar as in experiment 1. RESULTS At the end of the experimental period, significant levels of inhibition were noted in terms of both tooth movement and relapse movement in strontium-injected sides. Histological examinations showed that strontium enhanced the number of osteoblasts and reduced the number of osteoclasts. CONCLUSION The local injection of strontium can inhibit the degree of experimental and relapsed tooth movement in a rat model.
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Affiliation(s)
| | - Nidhal H. Ghaib
- Department of Orthodontics, College of Dentistry, University of Baghdad, Iraq
| | - Omar A. Kader
- Department of Oral Diagnosis, College of Dentistry, University of Baghdad, Iraq
| | - Bashar H. Abdullah
- Department of Oral Diagnosis, College of Dentistry, University of Baghdad, Iraq
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Jeong TM, Kim YH, Song SI. Anchor Plate Efficiency in Postoperative Orthodontic Treatment Following Orthognathic Surgery via Minimal Presurgical Orthodontic Treatment. Maxillofac Plast Reconstr Surg 2014; 36:154-60. [PMID: 27489827 PMCID: PMC4281914 DOI: 10.14402/jkamprs.2014.36.4.154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 04/28/2014] [Accepted: 07/08/2014] [Indexed: 11/17/2022] Open
Abstract
Purpose: The efficiency of an anchor plate placed during orthognathic surgery via minimal presurgical orthodontic treatment was evaluated by analyzing the mandibular relapse rate and dental changes. Methods: The subjects included nine patients with Class III malocclusion who had bilateral sagittal split osteotomy at the Division of Oral and Maxillofacial Surgery, Department of Dentistry in Ajou University Hospital, after minimal presurgical orthodontic treatment. During orthognathic surgery, anchor plates were placed at both maxillary buttresses. The anchor plates were used to move maxillary teeth backward and for maximum anchorage of Class III elastics to minimize mandibular relapse during the postoperative orthodontic treatment. The lateral cephalometric X-ray was taken preoperatively (T0), postoperatively (T1), and one year after the surgery (T2). Seven measurements (distance from Pogonion to line Nasion-Nasion perpendicular [Pog-N Per.], angle of line B point-Nasion and Nasion-Sella [SNB], angle of line maxilla 1 root-maxilla 1 crown and Nasion-Sella [U1 to SN], distance from maxilla 1 crown to line A point-Nasion [U1 to NA], overbite, overjet, and interincisal angle) were taken. Measurements at T0 to T1 and T1 to T2 were compared and differences tested by standard statistical methods. Results: The mean skeletal change was posterior movement by 13.87±4.95 mm based on pogonion from T0 to T1, and anterior movement by 1.54±2.18 mm from T1 to T2, showing relapse of about 10.2%. There were significant changes from T0 to T1 for both Pog-N Per. and SNB (P <0.05). However, there were no statistically significant changes from T1 to T2 for both Pog-N Per. and SNB. U1 to NA that represents the anterior-posterior changes of maxillary incisor did not differ from T0 to T1, yet there was a significant change from T1 to T2 (P <0.05). Conclusion: This study found that the anchor plate minimizes mandibular relapse and moves the maxillary teeth backward during the postoperative orthodontic treatment. Thus, we conclude that the anchor plate is clinically very useful.
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Affiliation(s)
- Tae-Min Jeong
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Ajou University School of Medicine
| | - Yoon-Ho Kim
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Ajou University School of Medicine
| | - Seung-Il Song
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, Ajou University School of Medicine
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de Assis Claro CA, Chagas RV, Neves ACEC, da Silva-Concílio LR. Comparative photoelastic study of dental and skeletal anchorages in the canine retraction. Dental Press J Orthod 2014; 19:100-5. [PMID: 24713566 PMCID: PMC4299427 DOI: 10.1590/2176-9451.19.1.100-105.oar] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Objective To compare dental and skeletal anchorages in mandibular canine retraction by means
of a stress distribution analysis. Methods A photoelastic model was produced from second molar to canine, without the first
premolar, and mandibular canine retraction was simulated by a rubber band tied to
two types of anchorage: dental anchorage, in the first molar attached to adjacent
teeth, and skeletal anchorage with a hook simulating the mini-implant. The forces
were applied 10 times and observed in a circular polariscope. The stresses located
in the mandibular canine were recorded in 7 regions. The Mann-Whitney test was
employed to compare the stress in each region and between both anchorage systems.
The stresses in the mandibular canine periradicular regions were compared by the
Kruskal-Wallis test. Results Stresses were similar in the cervical region and the middle third. In the apical
third, the stresses associated with skeletal anchorage were higher than the
stresses associated with dental anchorage. The results of the Kruskal-Wallis test
showed that the highest stresses were identified in the cervical-distal,
apical-distal, and apex regions with the use of dental anchorage, and in the
apical-distal, apical-mesial, cervical-distal, and apex regions with the use of
skeletal anchorage. Conclusions The use of skeletal anchorage in canine retraction caused greater stress in the
apical third than the use of dental anchorage, which indicates an intrusive
component resulting from the direction of the force due to the position of the
mini-implant and the bracket hook of the canine.
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Abstract
The need for orthodontic treatment modalities that provide maximal anchorage control but with minimal patient compliance requirements has led to the development of implant-assisted orthodontics and dentofacial orthopedics. Skeletal anchorage with miniscrew implants has no patient compliance requirements and has been widely incorporated in orthodontic practice. Miniscrew implants are now routinely used as anchorage devices in orthodontic treatment. This review summarizes recent data regarding the interpretation of bone data (i.e., bone quantity and quality) obtained by preoperative diagnostic computed tomography (CT) or by cone-beam computed tomography (CBCT) prior to miniscrew implant placement. Such data are essential when selecting appropriate sites for miniscrew implant placement. Bone characteristics that are indications and contraindications for treatment with miniscrew implants are discussed. Additionally, bicortical orthodontic skeletal anchorage, risks associated with miniscrew implant failure, and miniscrew implants for nonsurgical correction of occlusal cant or vertical excess are reviewed. Finally, implant stability is compared between titanium alloy and stainless steel miniscrew implants.
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Affiliation(s)
- Hong-Po Chang
- Faculty of Dentistry, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Dentistry, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan
| | - Yu-Chuan Tseng
- Faculty of Dentistry, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthodontics, Dental Clinics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
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Gupta N, Kotrashetti SM, Naik V. A comparitive clinical study between self tapping and drill free screws as a source of rigid orthodontic anchorage. J Maxillofac Oral Surg 2012; 11:29-33. [PMID: 23449815 PMCID: PMC3319814 DOI: 10.1007/s12663-011-0240-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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: 12/09/2009] [Accepted: 04/30/2011] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Self-tapping miniscrews are commonly being used as a temporary anchorage device for orthodontic purpose. A prerequisite for the insertion of these screws is the preparation of a pilot hole, which is time consuming and may result in damage to nerves, tooth root, drill bit breakage and thermal necrosis of bone. On the other hand the design of drill-free screws enables them to be inserted without drilling. The aim of this prospective study was to compare the stability and clinical response of the soft tissue around the self tapping and drill free screws when used for orthodontic anchorage for en mass retraction of maxillary anterior teeth. MATERIALS AND METHODS The study sample consisted of 20 patients requiring retraction of maxillary anterior teeth. The screws were placed in the alveolar bone between maxillary 2nd premolar and 1st molar bilaterally at the junction of attached gingiva and moveable mucosa. Pilot hole was drilled on the side which was selected for insertion of the self tapping screw under copious irrigation, after which it was inserted. Drill free screw was inserted on the contralateral side without predrilling. All screws were immediately loaded with 150-200 gm of retraction force. Patients were recalled for regular follow up for a period of 6 months. If the screws became mobile or showed any signs of inflammation during the course of the study, they were considered to be a failure. RESULTS After a period of 6 months an overall success rate of 77.5% was noted. Four self tapping and five drill-free screws failed during the study. There was no statistically significant difference between the two types of screws with respect to success/failure. Mobility was found to be the major cause for the failure. CONCLUSION Both self-tapping and the drill-free screws are effective anchorage units. But the latter have an edge over the conventional self-tapping screws because of decrease in operative time, little bone debris, less thermal damage, lower morbidity, and minimal patient discomfort as predrilling is not required, thus they can be used as a viable alternative. But self-tapping screws are still recommended for areas with high bone density and thick cortical bone.
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Affiliation(s)
- Nishant Gupta
- Department of Oral and Maxillofacial Surgery, Mahatma Gandhi Dental College and Hospital, Sitapura, Jaipur, India
| | - S. M. Kotrashetti
- Department of Oral and Maxillofacial Surgery, KLEVK Institute of Dental Sciences, KLE University, Belgaum, India
| | - Vijay Naik
- Department of Orthodontics and Dentofacial Orthopedics, KLEVK Institute of Dental Sciences, KLE University, Belgaum, India
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