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Mauricio F, Medina J, Mauricio-Vilchez C, Vilchez L, Mendoza R, Mayta-Tovalino F. Shear strength of metal brackets using LED lamps with different wavelengths: An in vitro comparative study. J Orthod Sci 2023; 12:47. [PMID: 37881676 PMCID: PMC10597364 DOI: 10.4103/jos.jos_15_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/08/2023] [Accepted: 04/11/2023] [Indexed: 10/27/2023] Open
Abstract
AIM To evaluate the shear strength of Orthocem and BracePaste polymerizable cement light-cured with light-emitting diode (LED) units with different wavelengths (Bluephase N) with their high power, low power, and soft start programs in the bonding of metal brackets. MATERIALS AND METHODS In vitro experimental research was performed. Mini Roth 0.022 metal brackets (Roth Orthometric brackets) were used. The adhesives were placed on the metal brackets with Orthocem and BracePaste resin cement. To compare the average strengths, the analysis of variance (ANOVA) test was used (P < 0.05). RESULTS The average shear strength was better with Bracepaste polymerizable cement compared to Orthocem cement in all its high power, low power, and soft star programs; the highest was Bracepaste with soft start of 26.52 MPa, and the lowest was Orthocem with soft start of 13.92 MPa. When evaluating the differences, it was found that these were statistically significant in all groups (P < 0.05). CONCLUSIONS Differences were found in the shear strength of light-curing Orthocem and Bracepaste light-curing cement cured with LED units with different wavelengths in bonding metal brackets to the tooth in vitro.
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Affiliation(s)
- Franco Mauricio
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Julia Medina
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Cesar Mauricio-Vilchez
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Luzmila Vilchez
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Roman Mendoza
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Frank Mayta-Tovalino
- Academic Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
- CHANGE Research Working Group, Postgraduate Department, Universidad Cientifica del Sur, Lima, Peru
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Najjar YM, Burhan AS, Hajeer MY, Nawaya FR. Effects of the conventional, soft start, and pulse delay modes produced by light-emitting diode device on microleakage beneath metal brackets: An in vitro comparative study. Int Orthod 2023; 21:100718. [PMID: 36516656 DOI: 10.1016/j.ortho.2022.100718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/25/2022] [Accepted: 11/27/2022] [Indexed: 12/14/2022]
Abstract
BACKGROUND This study aimed to evaluate microleakage beneath metal brackets cured by different light curing modes. MATERIALS AND METHODS Sixty extracted human premolars were randomly divided into three groups according to the light curing mode. Metal brackets were bonded in all groups according to the manufacturer's recommendations with a light-emitting diode device. Light curing was applied as follows: group 1: conventional mode (10 s mesial+10 s distal); group 2: soft start mode (15 s mesial+15 s distal); group 3: pulse delay mode (3 s mesial+3 s distal, followed by 3min of no photoactivation, then 9 s mesial+9 s distal). Radiant exposure was the same in all study groups. After curing, the teeth were incubated at 37 degrees for 24hours, then thermocycled 500 times. Next, they were sealed with nail varnish, immersed in methylene blue 1% for 24hours, sectioned, and examined under a stereomicroscope. Microleakage was measured at both enamel-adhesive and bracket-adhesive interfaces, and the total microleakage for each tooth was computed. Statistical analyses were performed using Kruskal-Wallis and Welch test for comparing microleakage among groups. Wilcoxon signed ranks test was used for comparing microleakage between the bracket-adhesive and enamel-adhesive interfaces. RESULTS There was no significant difference in microleakage at the bracket-adhesive interface among study groups. At the enamel-adhesive interface and total microleakage, the pulse delay group exhibited significantly lower microleakage than the conventional group. Whereas there was no significant difference between the soft start group and other study groups. In all study groups, microleakage at the enamel-adhesive interface was greater than that at the bracket-adhesive interface. CONCLUSION The pulse delay mode caused lesser microleakage than the conventional mode. This supports the use of this mode in orthodontic bonding.
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Affiliation(s)
| | - Ahmad S Burhan
- Department of Orthodontics, University of Damascus Dental School, Damascus, Syria
| | - Mohammad Y Hajeer
- Department of Orthodontics, University of Damascus Dental School, Damascus, Syria.
| | - Fehmieh R Nawaya
- Department of Pediatric Dentistry, Faculty of Dentistry, Syrian Private University, Damascus countryside, Syria
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Spineli LM, Pandis N. Meta-analysis of split-mouth studies. Am J Orthod Dentofacial Orthop 2023; 163:445-448. [PMID: 36870714 DOI: 10.1016/j.ajodo.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 01/12/2023] [Indexed: 03/05/2023]
Affiliation(s)
- Loukia M Spineli
- Midwifery Research and Education Unit, Hannover Medical School, Hannover, Germany
| | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, Dental School/Medical Faculty, University of Bern, Bern, Switzerland.
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Meta-analysis of cluster-randomized trials. Am J Orthod Dentofacial Orthop 2023; 163:288-291. [PMID: 36710062 DOI: 10.1016/j.ajodo.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 11/01/2022] [Indexed: 01/30/2023]
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Balakrishnan A, Antony V, Shaloob M, Roshan G, Nayaz M, Parayaruthottam P, Haris M. Effect of Different Light-tip Distances on Shear Bond Strength of Orthodontic Brackets Cured with Light-emitting Diode and High-intensity Light-emitting Diode. J Contemp Dent Pract 2022; 23:775-780. [PMID: 37283010 DOI: 10.5005/jp-journals-10024-3394] [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: 06/08/2023]
Abstract
AIM The aim was to find out whether the light-tip distance affected the shear bond strength of orthodontic brackets when cured with light-emitting diode (LED) and high-intensity LED at four different light-tip distances. MATERIALS AND METHODS Extracted human premolars were divided into eight groups. Each tooth was embedded in the self-cure acrylic resin block, and brackets were bonded and cured with different lights and different distances. Shear bond strength tests were performed in vitro using the universal testing machine. Data were analyzed using one-way ANOVA test. RESULTS The descriptive statistics for shear bond strength of orthodontic brackets cured with LED light at 0 mm was 8.49 ± 1.08 MPa, at 3 mm was 8.13 ± 0.85 MPa, 6 mm was 6.42 ± 0.42 MPa, and at 9 mm was 5.24 ± 0.92 MPa, and those cured with high-intensity light at 0 mm was 19.23 ± 4.83 MPa, at 3 mm was 17.65 ± 3.28 MPa, at 6 mm was 13.04 ± 2.36 MPa, and at 9 mm was 11.74 ± 1.4 MPa. Mean shear bond strength was found to decrease as the light-tip distance increased with both light sources. CONCLUSION Shear bond strength is higher when the light source is close to the surface to be cured, and it decreases as the distance increases. The highest shear bond strength was achieved with high-intensity light. CLINICAL SIGNIFICANCE Light-emitting diode or high-intensity units can be used for bonding orthodontic brackets without compromising the shear bond strength of the brackets, and that shear bond strength is stronger when the light source is close to the surface to be cured, and it decreases as the distance increases between the light source and the surface.
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Affiliation(s)
| | - Vincy Antony
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala, India, Phone: +91 9846353153, e-mail:
| | - Muhamed Shaloob
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala, India
| | - Gazanafer Roshan
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala, India
| | - Mohamed Nayaz
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala, India
| | | | - Mohamed Haris
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala, India
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Spineli LM, Pandis N. Missing participant outcome data in meta-analysis. Part I. Am J Orthod Dentofacial Orthop 2021; 160:481-483. [PMID: 34456008 DOI: 10.1016/j.ajodo.2021.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/07/2021] [Indexed: 10/20/2022]
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Seehra J, Stonehouse-Smith D, Pandis N. Prediction intervals reporting in orthodontic meta-analyses. Eur J Orthod 2021; 43:596-600. [PMID: 34331450 PMCID: PMC8633649 DOI: 10.1093/ejo/cjab037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Background A prediction interval represents a clinical interpretation of heterogeneity. The aim of this study was to determine the prevalence of prediction interval reporting in orthodontic random effect meta-analyses. The corroboration between effect size estimates with 95% confidence intervals (CIs) and prediction intervals were also explored. Materials and methods Systematic reviews (SRs) published between 1 January 2010 and 31 January 2021 containing at least one random effects meta-analysis (minimum of three trials) were identified electronically. SR and meta-analyses characteristics were extracted and prediction intervals, where possible, were calculated. Descriptive statistics and the percentage of meta-analyses where the prediction interval changed the interpretation based on the 95% CI were calculated. Fisher’s exact test was used to examine associations between the study variables and reporting of prediction intervals. Results One hundred and twenty-one SRs were included. The median number of SR authors was 5 (interquartile range: 4–6). The reporting of prediction intervals was undertaken in only 19.0% (N = 23/121) of meta-analyses. Out of 95 meta-analyses, only in 6 (6.3%, N = 6/95) were the 95% CI corroborated by the prediction interval. In 60 meta-analyses (63.3%, N = 60/95) despite a 95% CI indicating a statistically significant result, this was not corroborated by the corresponding prediction interval. Conclusions Within the study timeframe, reporting of prediction intervals is not routinely undertaken in orthodontic meta-analyses possibly due to a lack of awareness. In future orthodontic random effects models containing a minimum of three trials, reporting of prediction intervals is advocated as this gives an indication of the range of the expected effect of treatment interventions.
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Affiliation(s)
- Jadbinder Seehra
- Department of Orthodontics, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, Guy's Hospital, Guy's and St Thomas NHS Foundation Trust, UK
| | - Daniel Stonehouse-Smith
- Department of Orthodontics, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, Guy's Hospital, Guy's and St Thomas NHS Foundation Trust, UK
| | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, Dental School/Medical Faculty, University of Bern, Switzerland
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Albertin SA, Pinzan-Vercelino CRM, Flores-Mir C, Gurgel JDA. Failure rates among metal brackets cured with two high-intensity LED light-curing lamps: an in vivo study. Eur J Orthod 2021; 43:229-233. [PMID: 32255187 DOI: 10.1093/ejo/cjaa025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The objective of this split-mouth clinical trial was to compare bonding failure rates of metal brackets bonded with two different light-emitting diode (LED) light-curing lamps with different high-intensity power outputs. MATERIALS AND METHODS Forty patients were included for a total of 800 brackets that were randomly bonded (left and right sides in a 1:1 ratio) in maxillary and mandibular arches using two different LED devices. An LED of 3200 mW/cm2 and an LED of 5000 mW/cm2 were used in this split-mouth clinical trial. Bonding failures during the initial 6 months of orthodontic treatment were recorded as maxillary versus mandibular, anterior teeth versus posterior teeth, and left side versus right side. RESULTS Five dropouts were recorded for discontinuing orthodontic treatment and 700 brackets were analysed in total. The bonding failure rates for 3200 and 5000 mW/cm2 LEDs were 6.0 and 7.4 per cent, respectively (P = 0.450), which were not statistically significantly different. There were no significant differences in bracket survival rates between the LEDs used (P = 0.866). The posterior teeth presented a higher index of bond failures (odds ratio, 3.14; 95% confidence interval, 1.68-5.87; P < 0.001). LIMITATIONS Direct comparison was only done between two high-intensity LED lights rather than against conventionally used halogen lights. CONCLUSION Similar bonding failures were recorded using both LED devices (3200 and 5000 mW/cm2). Significantly more bonding failures occurred in premolar teeth than in anterior teeth.
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Affiliation(s)
| | | | - Carlos Flores-Mir
- Department of Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Júlio de Araújo Gurgel
- Department of Orthodontics, CEUMA University, São Luís, Maranhão, Brazil.,Department of Orthodontics, CEUMA University, São Luís, Maranhão, Brazil and Department of Speech-Language Pathology, University of the State of São Paulo, Marília, São Paulo, Brazil
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Spineli LM, Pandis N. Statistical heterogeneity: Notion and estimation in meta-analysis. Am J Orthod Dentofacial Orthop 2020; 157:856-859.e2. [PMID: 32487316 DOI: 10.1016/j.ajodo.2020.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 11/26/2022]
Affiliation(s)
- Loukia M Spineli
- Midwifery Research and Education Unit, Hannover Medical School, Hannover, Germany
| | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland.
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Spineli LM, Pandis N. Exploring heterogeneity in meta-analysis: Meta-regression analysis. Am J Orthod Dentofacial Orthop 2020; 158:623-625. [PMID: 32988571 DOI: 10.1016/j.ajodo.2020.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 11/25/2022]
Affiliation(s)
- Loukia M Spineli
- Midwifery Research and Education Unit, Hannover Medical School, Hannover, Germany
| | - Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, University of Bern, Bern, Switzerland.
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Nagani NI, Ahmed I, Tanveer F, Khursheed HM, Farooqui WA. "Clinical comparison of bond failure rate between two types of mandibular canine-canine bonded orthodontic retainers- a randomized clinical trial". BMC Oral Health 2020; 20:180. [PMID: 32600325 PMCID: PMC7325010 DOI: 10.1186/s12903-020-01167-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 06/17/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bonded retainers are widely used as they are esthetically pleasing, easily acceptable, provide greater stability, compliance free and causes no soft tissue irritation and speech problems. Though, fracture and bond failure are their shortcomings. Therefore, the objectives of this study were to evaluate the number of bond failures and type of failure pattern between two types of mandibular canine-canine bonded retainers. METHODS Total 60 subjects were recruited initially and were assessed for eligibility, out of which 6 were excluded and 2 were lost to follow up. They were randomly divided into two groups. Fiber reinforced composite (FRC) retainers were inserted in group 1 subjects while group 2 subjects received multistranded stainless steel (MSW) retainers. The subjects were recalled after every 3 months over a period of 1 year. Bond failure rate and failure pattern based on adhesive remnant index were evaluated at each visit. The bond failure rate and failure pattern were compared between the two retainers by using Chi-square test. RESULTS The bond failure rates were 42.94% for FRC retainer and 31.41% for MSW retainer. Hence, total number of bond failures in both retainers were 37.17%. The difference of bond failure between two groups was statistically significant (p = 0.012). Type "0" failure pattern was detected commonly with both types of retainers (p < 0.001). CONCLUSION Our findings indicate that multistranded stainless steel wire retainer is a superior option to be used for fixed lingual retention in mandibular arch as it exhibited lower bond failure as compared to fiber reinforced composite retainer. Adhesive failure is the most common type of bond failure observed with both types of fixed retainers. TRIAL REGISTRATION ID NCT03881813 ( https://clinicaltrials.gov/ ); March 19, 2019, retrospective registration.
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Affiliation(s)
- Nasreen Iqbal Nagani
- Department Of Orthodontics, Dr. Ishrat-Ul-Ebad Khan Institute Of Oral Health Sciences (DIKIOHS), Dow University Of Health Sciences, Karachi, Pakistan. .,Present Address: Adam Plaza, flat no 103, opp: New Town Masjid, Gurumandir, Karachi, Pakistan.
| | - Imtiaz Ahmed
- Department Of Orthodontics, Dr. Ishrat-Ul-Ebad Khan Institute Of Oral Health Sciences (DIKIOHS), Dow University Of Health Sciences, Karachi, Pakistan
| | - Faiqa Tanveer
- Department Of Orthodontics, Dr. Ishrat-Ul-Ebad Khan Institute Of Oral Health Sciences (DIKIOHS), Dow University Of Health Sciences, Karachi, Pakistan
| | - Hafiza Marium Khursheed
- Department Of Orthodontics, Dr. Ishrat-Ul-Ebad Khan Institute Of Oral Health Sciences (DIKIOHS), Dow University Of Health Sciences, Karachi, Pakistan
| | - Waqas Ahmed Farooqui
- Department of Research, School of Public Health, Dow University Of Health Sciences Karachi, Karachi, Pakistan
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Spineli LM, Pandis N. Prediction interval in random-effects meta-analysis. Am J Orthod Dentofacial Orthop 2020; 157:586-588. [DOI: 10.1016/j.ajodo.2019.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 10/21/2019] [Accepted: 12/31/2019] [Indexed: 10/24/2022]
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Lopes GV, Correr-Sobrinho L, Correr AB, Godoi APTD, Vedovello SAS, Menezes CCD. Light Activation and Thermocycling Methods on the Shear Bond Strength of Brackets Bonded to Porcelain Surfaces. Braz Dent J 2020; 31:52-56. [PMID: 32159706 DOI: 10.1590/0103-6440202003101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 09/25/2019] [Indexed: 11/21/2022] Open
Abstract
The present study was evaluated the effect of different light activation and thermocycling methods on the shear bond strength (SBS) and on the adhesive remnant index (ARI) of metal brackets bonded to feldspathic ceramic. Hundred metal brackets were bonded to 20 porcelain cylinders, divided into four groups (n=25) based on light activation and thermocycling processes. The cylinders were etched with 10% hydrofluoric acid for 60 s and coated with two layers of silane. The brackets were bonded with Transbond XT composite resin. Light activation in Groups 1 and 3 was performed during 3 s using the VALO Ortho Cordless appliance with irradiance 3,200 mW/cm2 and in Groups 2 and 4 for 40 s using Optilight Max appliance with irradiance 1,200 mW/cm². The samples were stored in deionized water at 37°C for 24 h and the samples from Groups 1 and 2 were submitted to the SBS test at a rate of 1 mm/min, whereas the samples from Groups 3 and 4 were submitted to 7,000 thermal cycles (5°/55°C) before to the SBS test. The data were assessed by two-way analysis of variance and by Tukey's test (a=0.05). No significant difference was observed between SBS means in the different light activation devices used. The samples subjected to thermocycling revealed lower SBS values (p≤0.05). There was predominance of score 0 for ARI in all groups. Therefore, the different light activation methods did not interfere in SBS, but thermocycling reduced SBS.
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Affiliation(s)
- Gustavo Vallandro Lopes
- Departament of Orthodontics, Centro Universitário da Fundação Hermínio Ometto -FHO, Araras, SP, Brazil
| | - Lourenço Correr-Sobrinho
- Departamento of Restorative Dentistry, Dental Materials, UNICAMP - Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Américo Bortolazzo Correr
- Departamento of Restorative Dentistry, Dental Materials, UNICAMP - Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | | | | | - Carolina Carmo de Menezes
- Departament of Orthodontics, Centro Universitário da Fundação Hermínio Ometto -FHO, Araras, SP, Brazil
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Spineli LM, Pandis N. Meta-analysis: Random-effects model. Am J Orthod Dentofacial Orthop 2020; 157:280-282. [DOI: 10.1016/j.ajodo.2019.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 10/21/2019] [Accepted: 10/23/2019] [Indexed: 01/08/2023]
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Spineli LM, Pandis N. Meta-analysis: Fixed-effect model. Am J Orthod Dentofacial Orthop 2020; 157:134-137. [DOI: 10.1016/j.ajodo.2019.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 10/21/2019] [Accepted: 10/23/2019] [Indexed: 11/15/2022]
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Vásquez-Cárdenas J, Zapata-Noreña Ó, Carvajal-Flórez Á, Barbosa-Liz DM, Giannakopoulos NN, Faggion CM. Systematic reviews in orthodontics: Impact of the PRISMA for Abstracts checklist on completeness of reporting. Am J Orthod Dentofacial Orthop 2019; 156:442-452.e12. [PMID: 31582116 DOI: 10.1016/j.ajodo.2019.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 05/01/2019] [Accepted: 05/01/2019] [Indexed: 12/13/2022]
Abstract
INTRODUCTION This study evaluated and compared the completeness of reporting of abstracts of orthodontics systematic reviews before and after the publication of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) extension for Abstracts Checklist (PRISMA-A). METHODS Abstracts of systematic reviews and meta-analyses in orthodontics published in PubMed, Latin American and Caribbean Health Sciences Literature, and the Cochrane Database of Systematic Reviews databases before March 23, 2018, that met the predefined inclusion and exclusion criteria, were evaluated using the 12 items of PRISMA-A, scoring each item from 0 to 2. Abstracts were classified into 2 groups: before and after publication of the PRISMA-A checklist. Three calibrated evaluators (intraclass correlation coefficient and kappa > 0.8) assessed the scores for compliance with the checklist. The number of authors, country of affiliation of the first author, performance of meta-analysis, and topic of the article were recorded. A regression analysis was performed to assess the associations between abstract characteristics and the PRISMA-A scores. RESULTS Of 1034 abstracts evaluated, 389 were included in the analysis. The mean PRISMA-A score was 53.39 (95% CI, 51.83-54.96). The overall score for studies published after the publication of the checklist was significantly higher than for studies published before (P ≤ 0.0001). The components returning significantly higher scores after publication of PRISMA-A were title (P = 0.024), information from databases (P = 0.026), risk of bias (P ≤ 0.0001), included studies (P ≤ 0.0001), synthesis of results (P ≤ 0.0001), interpretation of results (P = 0.035), financing and conflict of interest (P ≤ 0.0001), and registration (P ≤ 0.0001). These results showed the positive effect of PRISMA-A had on the quality of reporting of orthodontics systematic reviews. Nevertheless, the poor adherence revealed that there is still need for improvement in the quality of abstract reporting. CONCLUSIONS The quality of reporting of abstracts of orthodontic systematic reviews and meta-analyses increased after the introduction of PRISMA-A.
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Affiliation(s)
- Jenny Vásquez-Cárdenas
- Orthodontic Postgraduate Program, Gionorto Research Group, Faculty of Dentistry, University of Antioquia, Medellín, Colombia
| | - Óscar Zapata-Noreña
- Orthodontic Postgraduate Program, Gionorto Research Group, Faculty of Dentistry, University of Antioquia, Medellín, Colombia
| | - Álvaro Carvajal-Flórez
- Orthodontic Postgraduate Program, Gionorto Research Group, Faculty of Dentistry, University of Antioquia, Medellín, Colombia
| | - Diana María Barbosa-Liz
- Orthodontic Postgraduate Program, Gionorto Research Group, Faculty of Dentistry, University of Antioquia, Medellín, Colombia.
| | | | - Clovis Mariano Faggion
- Department of Periodontology and Operative Dentistry, Faculty of Dentistry, University of Münster, Münster, Germany
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Andrews KM, Roberson G, Subramani K, Chaudhry K. The effect of dental chair light exposure duration on shear bond strength of orthodontic brackets: An in vitro study. J Clin Exp Dent 2019; 10:e1075-e1081. [PMID: 30607224 PMCID: PMC6311395 DOI: 10.4317/jced.55296] [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: 09/12/2018] [Accepted: 10/03/2018] [Indexed: 11/05/2022] Open
Abstract
Background The purpose of this study is to determine if the duration of exposure to the halogen overhead dental chair light has an effect on shear bond strength (SBS) of metal orthodontic brackets. Material and Methods One hundred twenty extracted human lower incisor teeth were divided into six groups (n=20/group). Each group was assigned a predetermined duration of exposure to the halogen dental chair light, set at a fixed distance, before being cured. Light exposure times of 0 minutes (Group 1-Control), 1 minute (Group 2), 2.5 minutes (Group 3), 5 minutes (Group 4), 10 minutes (Group 5), and 15 minutes (Group 6) were tested. Each tooth was subjected to an exclusion criteria examination, scrubbed of all debris, and imbedded in a PVC-stone fixture with the crown of the tooth exposed above the stone surface. All groups had orthodontic brackets bonded with the same materials and process, then light cured for 6 seconds using the Valo LED curing unit after their designated light exposure time. Groups were tested using an Instron E-1000 universal testing machine with a shear load test set at a speed of 1mm/min using a knife-edged chisel. Data was analyzed using a one-way ANOVA test. The Adhesive Remnant Index (ARI) was scored under 10x magnification. The ARI data was analyzed using the Chi-square test (p-value < 0.05). Results All control and experimental groups for each specific tooth type tested resulted in SBS within or above the clinically acceptable range. Statistically significant differences (p<.05) were found between the control and experimental groups for dental chair light exposure times of 5 minutes, 10 minutes and 15 minutes. A chi-square test determined that there was statistical significance when evaluating the frequency of ARI scores when light exposure duration was greater than 5 minutes. Conclusions It can be concluded that dental chair light exposure in the 5 minute, 10 minute and 15 minute groups produced higher shear bond strength than those of the control, 1 minute and 2.5 minute groups. The dental chair light is capable of initiating polymerization and causing higher bond strengths than the clinical acceptability of 5.8-7.9 MPa, thus continued dental chair light exposure over 5 minutes is not recommended. The ARI analysis revealed that as bond strength increased, the fracture pattern shifted from most remaining adhesive attached to the tooth toward that attached to the bracket. Key words:Shear bond strength, orthodontic bracket, adhesive remnant index, dental chair light, light exposure, composite curing.
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Affiliation(s)
- Kevin M Andrews
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Glen Roberson
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Karthikeyan Subramani
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
| | - Kishore Chaudhry
- Roseman University of Health Sciences, College of Dental Medicine, Henderson, NV, USA
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Oeiras VJ, Silva VAAE, Azevedo LA, Lobato VS, Normando D. Survival analysis of banding and bonding molar tubes in adult patients over a 12-month period: a split-mouth randomized clinical trial. Braz Oral Res 2016; 30:e136. [PMID: 28001244 DOI: 10.1590/1807-3107bor-2016.vol30.0136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 10/27/2016] [Indexed: 11/22/2022] Open
Abstract
This split-mouth randomized clinical trial aimed to compare the survival rate of bonding and banding molar tubes in adult orthodontic patients. Eligibility criteria included adults (aged >18 years), no active caries, restorations, or fractures in the upper and lower molars. The main outcome was any type of first-time failure in molar tubes. A computer-generated randomization scheme was used in a 1:1 ratio. The survival rate was estimated for 32 adult patients, in whom a tube was bonded to a molar tooth using composite resin on one side and a band was cemented with glass ionomer onto the same tooth in the contralateral arch. A total of 59 banded and 59 bonded molars were followed up for 12 months. Blinding was not applicable. Survival analysis including Cox regression was used at p < 0.05. The survival rate of bonded molars was not statistically different from that of banded molars (log-rank test, p = 0.97). Hazard ratio (HR) was 0.72 (95%CI, 0.38-1.31). Bonded upper molars yielded a survival rate of 81.25% (26 out of 32) compared to 71.87% (23 out of 32) for banded upper molars. The survival rate was 66.66% (18 out of 27) for banded lower molars and 59.25% for bonded lower molars (16 out of 27). The HR for lower vs. upper arch was 2.16 (95%CI, 1.18-3.98). No serious problem was observed other than gingivitis associated with plaque accumulation. In contrast to previous studies in young patients, in adults, bonding orthodontic tubes to molars is similar to molar banding. However, both procedures had a high failure rate in the lower arch.
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Affiliation(s)
- Valéria Jacques Oeiras
- Universidade Federal do Pará - UFPA, School of Dentistry, Department of Orthodontics, Belém, Pará, Brazil
| | | | - Leidiana Aguiar Azevedo
- Universidade Federal do Pará - UFPA, School of Dentistry, Department of Orthodontics, Belém, Pará, Brazil
| | - Vanessa Soares Lobato
- Universidade Federal do Pará - UFPA, School of Dentistry, Department of Orthodontics, Belém, Pará, Brazil
| | - David Normando
- Universidade Federal do Pará - UFPA, School of Dentistry, Department of Orthodontics, Belém, Pará, Brazil
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Oz AA, Oz AZ, Arici S. In-vitro bond strengths and clinical failure rates of metal brackets bonded with different light-emitting diode units and curing times. Am J Orthod Dentofacial Orthop 2016; 149:212-6. [DOI: 10.1016/j.ajodo.2015.07.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 07/01/2015] [Accepted: 07/01/2015] [Indexed: 10/22/2022]
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Abreu Neto HFD, Costa AR, Correr AB, Vedovello SA, Valdrighi HC, Santos ECA, Correr-Sobrinho L, Vedovello Filho M. Influence of Light Source, Thermocycling and Silane on the Shear Bond Strength of Metallic Brackets to Ceramic. Braz Dent J 2015; 26:685-8. [PMID: 26963217 DOI: 10.1590/0103-6440201300416] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/05/2015] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to evaluate the effects of different light sources, thermocycling and silane on the bond strength of metallic brackets to ceramic. Cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Half of the cylinders (Groups 1 to 4) received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT and divided into 8 groups (n=20), according to light source (Radii Plus LED - 40 s; Groups 1, 2, 5 and 6 and XL 2500 halogen light - 40 s; Groups 3, 4, 7 and 8) and experimental conditions with (Groups 2, 4, 6 and 8) without thermocycling (Groups 1, 3, 5 and 7). Shear bond testing was carried out after 24 h of deionized water storage (Groups 1, 3, 5 and 7) and thermocycling (Groups 2, 4, 6 and 8; 7,000 cycles - 5°/55 °C). Date were submitted to three-way ANOVA and Tukey's post hoc test (α=0.05). The Adhesive Remnamt Index (ARI) was evaluated at 8× magnification. The application of silane was effective in increasing the shear bond strength of the brackets to ceramic (p<0.05). Significant difference (p<0.05) on the bond strength was observed between light sources with or without thermocycling. The ARI showed a predominance of scores 0 for all groups, with an increase in scores 1, 2 and 3 for the silane groups. In conclusion, silane improved significantly the shear bond strength of the brackets to ceramic. The thermocycling and light sources influence on the bond strength.
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Altmann ASP, Collares FM, Ogliari FA, Samuel SMW. Effect of methacrylated-based antibacterial monomer on orthodontic adhesive system properties. Am J Orthod Dentofacial Orthop 2015; 147:S82-7. [PMID: 25836348 DOI: 10.1016/j.ajodo.2015.01.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 01/01/2015] [Accepted: 01/01/2015] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Antibacterial adhesives were developed to reduce the incidence of white spot lesions in orthodontic patients. Compounds that contain triazine are known as effective antibacterial agents. The aims of this study were to develop an experimental orthodontic adhesive containing 1,3,5-triacryloylhexahydro-1,3,5-triazine (TAT) and to characterize it. METHODS TAT was added in 3 concentrations (10%, 15%, and 20%) to the experimental orthodontic adhesive. Antibacterial activity was assayed by brain-heart infusion broth dilution against Streptococcus mutans. The degree of conversion was measured using Fourier transform infrared spectroscopy, and solvent degradation was evaluated by Knoop microhardness before and after immersion in ethanol for 2 hours. The shear bond strength of metal brackets bonded to bovine enamel surface was assessed. RESULTS All experimental adhesives reduced bacterial growth. The addition of 15% and 20% TAT increased the degree of conversion compared with the control group (0%) and the 10% group. All groups showed a decrease in hardness after ethanol immersion, and there was also a decrease in the percentage of variation of Knoop hardness in the experimental adhesives containing TAT, whereas the shear bond strength increased. CONCLUSIONS Orthodontic adhesives containing TAT are promising antibacterial materials, especially those with 15% and 20% TAT.
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Affiliation(s)
- Aline Segatto Pires Altmann
- Graduate student, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Fabrício Mezzomo Collares
- Adjunct professor, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Fabrício Aulo Ogliari
- Adjunct Professor, School of Engineering, Federal University of Pelotas, Pelotas, Rio Grande do Sul, Brazil
| | - Susana Maria Werner Samuel
- Professor, Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Allareddy V, Rampa S, Masoud MI, Lee MK, Nalliah R, Allareddy V. Overview of registered studies in orthodontics: Evaluation of the ClinicalTrials.gov registry. Am J Orthod Dentofacial Orthop 2014; 146:587-93. [PMID: 25439209 DOI: 10.1016/j.ajodo.2014.07.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 07/01/2014] [Accepted: 07/01/2014] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The Food and Drug Administration Modernization Act of 1997 made it mandatory for all phase II through IV trials regulated by this Act to be registered. After this, the National Institutes of Health created ClinicalTrials.gov, which is a registry of publicly and privately supported clinical studies of human participants. The objective of this study was to examine the characteristics of registered studies in orthodontics. METHODS The ClinicalTrials.gov Web site was used to query all registered orthodontic studies. The search term used was "orthodontics." No limitations were placed for the time period. All registered studies regardless of their recruitment status, study results, and study type were selected for analysis. RESULTS A total of 64 orthodontic studies were registered as of January 1, 2014. Of these, 52 were interventional, and 12 were observational. Close to 60% of the interventional studies and 66.7% of the observational studies had sample sizes of 50 or fewer subjects. About 21.2% of the interventional studies and 16.7% of the observational studies had sample sizes greater than 100. Only 1 study was funded by the National Institutes of Health, and the rest were funded by "other" or "industry" sources. Close to 87.7% of the interventional studies were randomized. Interventional model assignments included factorial assignment (3.9%), parallel assignments (74.5%), crossover assignment (7.8%), and single-group assignment (13.7%). Most studies were treatment oriented (80.4%). The types of masking used by the interventional studies included open label (28.9%), single blind (44.2%), and double blind (26.9%). Outcome assessors were blinded in only 6 studies. CONCLUSIONS Orthodontic studies registered in ClinicalTrials.gov are dominated by small single-center studies. There are wide variations with regard to treatment allocation approaches and randomization methods in the studies. These results also indicate the need for multicenter clinical studies in orthodontics.
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Affiliation(s)
- Veerasathpurush Allareddy
- Associate professor, Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, Iowa.
| | - Sankeerth Rampa
- Graduate student, University of Nebraska Medical Center, Omaha, Neb
| | - Mohamed I Masoud
- Director of orthodontics, Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Mass
| | - Min Kyeong Lee
- Postgraduate student, Department of Developmental Biology, Harvard School of Dental Medicine, Boston, Mass
| | - Romesh Nalliah
- Instructor, Office of Global Health, Harvard School of Dental Medicine, Boston, Mass
| | - Veerajalandhar Allareddy
- Assistant professor, Department of Pediatric Critical Care and Pharmacology, Rainbow Babies and Children's Hospital, University Hospitals, Case Medical Center, Cleveland, Ohio
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Pandis N, Fleming PS, Kloukos D, Polychronopoulou A, Katsaros C, Eliades T. Survival of bonded lingual retainers with chemical or photo polymerization over a 2-year period: a single-center, randomized controlled clinical trial. Am J Orthod Dentofacial Orthop 2013; 144:169-75. [PMID: 23910197 DOI: 10.1016/j.ajodo.2013.02.030] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 02/01/2013] [Accepted: 02/01/2013] [Indexed: 11/29/2022]
Abstract
INTRODUCTION The objective of this trial was to compare the survival rates of mandibular lingual retainers bonded with either chemically cured or light-cured adhesive after orthodontic treatment. METHODS Patients having undergone orthodontic treatment at a private orthodontic office were randomly allocated to fixed retainers placed with chemically cured composite or light-cured composite. Eligibility criteria included no active caries, restorations, or fractures on the mandibular anterior teeth, and adequate oral hygiene. The main outcome was any type of first-time lingual retainer breakage; pattern of failure (adapted adhesive remnant index scores) was a secondary outcome. Randomization was accomplished with random permuted blocks of 20 patients with allocation concealed in sequentially numbered, opaque, sealed envelopes. Blinding was applicable for outcome assessment only. Patients were reviewed at 1, 3, and 6 months and then every 6 months after placement of the retainer until completion of the study. Data were analyzed using survival analysis including Cox regression; sensitivity analysis was carried out after data imputation for subjects lost to follow-up. RESULTS Two hundred twenty patients (median age, 16 years; interquartile range, 2; range, 12-47 years) were randomized in a 1:1 ratio to either chemical or light curing. Baseline characteristics were similar between groups, the median follow-up period was 2.19 years (range, 0.003-3.64 years), and 16 patients were lost to follow-up. At a minimum follow-up of 2 years, 47 of 110 (42.7%) and 55 of 110 (50.0%) retainers had some type of failure with chemically cured and light-cured adhesive, respectively (log-rank test, P = 0.35). Data were analyzed on an intention-to-treat basis, and the hazard ratio (HR) was 1.15 (95% confidence interval [CI], 0.88-1.70; P = 0.47). There was weak evidence that age is a significant predictor for lingual retainer failures (HR, 0.96; 95% CI, 0.93-1.00; P = 0.08). Adhesive remnant index scoring was possible for only 66 of the 102 (64.7%) failures and did not differ between composites (Fisher exact test, P = 0.16). No serious harm was observed other than gingivitis associated with plaque accumulation. CONCLUSIONS The results of this study indicated no evidence that survival of mandibular lingual retainers differs between chemically and light-cured adhesives. The overall failure rate was 46.4%; however, this included any type of failure, which may have exaggerated the overall failure rate.
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Affiliation(s)
- Nikolaos Pandis
- Department of Orthodontics and Dentofacial Orthopedics, Faculty of Medicine, University of Bern, Bern, Switzerland.
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Pandis N. Randomized clinical trials (RCTs) and systematic reviews (SRs) in the context of evidence-based orthodontics (EBO). Semin Orthod 2013. [DOI: 10.1053/j.sodo.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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