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Li Q, Yang K. Loss of attachments in patients during orthodontic therapy with clear aligners: A prospective clinical study. Orthod Craniofac Res 2024; 27:244-250. [PMID: 37665036 DOI: 10.1111/ocr.12710] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 09/05/2023]
Abstract
OBJECTIVE This study aimed to assess the loss rate of attachments and investigate its probable influencing factors in patients during orthodontic therapy with clear aligners. MATERIALS AND METHODS A total of 55 patients treated with clear aligners were enrolled in this prospective clinical study. The loss rate of attachments was evaluated after a 6-month follow-up since the initial bonding was finished. The attachment survival curves were gone through Kaplan-Meier estimates. The Cox regression model with shared frailty was conducted to evaluate the hazard ratios (HRs) for the following factors, including sex, age, dental malocclusion, vertical skeletal pattern, anterior overbite, operators, tooth extraction, attachment amount, arch, tooth position and attachment type. RESULTS There were a total of 47 patients (14 males and 33 females; and mean age: 26.77 ± 8.45) in which 722 attachments were involved in the final analysis. During the 6-month follow-up, 99 attachments were lost by 40 participants. The overall loss rate was 13.7%. The loss of attachments was more common in the early months of therapy. During the first 2 months, 71 attachments were lost. The loss rate of attachments was not significantly affected by sex, age, dental malocclusion, vertical skeletal pattern, anterior overbite, operators, tooth extraction, attachment amount and attachment type (P > 0.05). The loss rate of mandibular attachments was 1.8 times that of maxillary attachments (HR = 1.8; 95% CI: 1.2-2.8; P = 0.009). The loss rate of molar attachments was 5.5 times that of incisor attachments (HR = 5.5; 95% CI: 1.6-19; P = 0.007). CONCLUSION During the first 6 months, the overall loss rate of attachments was 13.7%. In the early months of therapy, loss of attachments was more common. The loss rate decreased as treatment time increased. Loss of attachments was significantly affected by arch and tooth position, with higher loss rates in the mandibular arch and molars. Besides, loss of attachments was not affected by sex, age, dental malocclusion, vertical skeletal pattern, anterior overbite, operators, tooth extraction, attachment amount and attachment type.
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Affiliation(s)
- Qiuying Li
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Kai Yang
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
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Hasan NM, Yassir YA. Evaluation of failure rate of molar tubes with a modified bonding technique: a randomized clinical trial. Eur J Orthod 2023; 45:764-772. [PMID: 37467348 DOI: 10.1093/ejo/cjad029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
BACKGROUND During orthodontic therapy, bond failure of molar tubes may delay treatment. With the high failure rate of molar tubes, alternative bonding techniques were tested to improve bond strength. OBJECTIVES To compare the failure rates of molar tubes bonded with conventional and alternative bonding techniques by adding a layer of compomer adhesive at the molar/tube interface. TRIAL DESIGN Single-centre, single-blinded, split-mouth, randomized clinical trial. METHODS Patients aged 12 years or older, who required fixed appliance orthodontic treatment without extraction and with no occlusal interference were eligible to participate. They were allocated randomly using a simple non-stratified split-mouth design with a 1:1 allocation ratio. Blinding was only possible for the patients and data analysts. Molar tubes bonded with the modified bonding technique had an additional layer of compomer at the occlusal molar/tube interface. The patients were followed-up for nine months. Outcome measures included the survival time of molar tubes and the number of molar tubes debonded. The bond failure of molar tubes was analyzed using Kaplan-Meier and Cox regression analysis (P < 0.05). RESULTS Thirty patients were recruited, randomized, and analyzed (mean age 20.33 years). The failure rate of molar tubes bonded with the modified bonding technique was 4.2 per cent and that of molar tubes bonded with the conventional bonding technique was 6.7 per cent. This difference was not statistically significant (P > 0.05). The dental arch and molar type were found to be as significant predictors for molar tube failure rate. No harm was detected during treatment. LIMITATIONS The effect of compomer to reduce enamel demineralization was not tested. CONCLUSIONS AND IMPLICATIONS The modified bonding technique did not significantly reduce the failure rate of molar tubes. The molar tubes bonded on the upper arch and second molars are more susceptible to debond. REGISTRATION The trial was registered with ClinicalTrials.gov on 21 May 2022 (Registration number: NCT05391386). FUNDING This research did not receive any funding.
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Affiliation(s)
- Nawar M Hasan
- Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Yassir A Yassir
- Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
- School of Dentistry, University of Dundee, Dundee, UK
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Omidkhoda M, Eslami N, Mazloum M, Entezari M. Evaluation of bond strength of orthodontic brackets using light- and chemical-cure adhesive systems over time: An in-vitro study. J Orthod Sci 2023; 12:6. [PMID: 37351402 PMCID: PMC10282509 DOI: 10.4103/jos.jos_31_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/27/2022] [Accepted: 08/04/2022] [Indexed: 06/24/2023] Open
Abstract
AIMS This study aimed to evaluate the bond strength of light- and chemical-cure adhesive systems over six months. MATERIALS AND METHODS A total of 144 sound human maxillary first and second premolars were randomly divided into six groups according to the adhesive type (i.e., Transbond XT and Unite) and evaluation time. The groups were T0 (24-h group without thermocycling), T1 (24-h group with thermocycling), T2 (1-month group), T3 (2-month group), T4 (4-month group), and T5 (6-month group). The bond strength was then measured and the data were analyzed by SPSS software (version 23) through the independent t-test and one-way ANOVA. A P value less than 0.05 was considered statistically significant. RESULTS The results of this study showed that shear bond strength of chemical-cure orthodontic adhesive (Unite, 15.37 MPa) at all-time points was significantly 1.37 times higher than that of the Transbond XT light-cure adhesive (11.15 MPa). Moreover, shear bond strength of self-cure adhesive (Unite) 1 month after debonding showed a significant difference with the 24-h group without thermocycling (P = 0.002), 24-h group with thermocycling (P = 0.008), and 6-month group (P = 0.016). The highest shear bond strength in both adhesives was observed at one month. Furthermore, the shear bond strength of Transbond XT light-cure adhesive one month after debonding showed a significant difference with the 24-h group without thermocycling (P = 0.000) and 24-h group with thermocycling (P = 0.000), as well as with the 2-month (P = 0.008), 4-month (P = 0.000), and 6-month groups (P = 0.016). CONCLUSION Unite self-cure adhesive compared to Transbond XT light-cure adhesive has higher bond strength and is recommended for rebonding brackets in patients with multiple rebonds.
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Affiliation(s)
- Maryam Omidkhoda
- Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Neda Eslami
- Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Maryam Mazloum
- Dentist, Graduate Student of Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mostafa Entezari
- Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
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En PLX, SoYeon O, Nor NNM, Mei L, Farella M, Prasad S. Dietary experiences during fixed orthodontic treatment. APOS TRENDS IN ORTHODONTICS 2023. [DOI: 10.25259/apos_164_2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Objectives:
Orthodontists generally recommend avoidance of certain foods during fixed appliance (FA) treatment, based on anecdotal information. This study aimed to identify the dietary preferences and experiences of patients undergoing FA treatment as a step toward the preparation of evidence-based dietary guidelines.
Material and Methods:
Questionnaires regarding dietary preferences and experiences of patients undergoing FA treatment were applied to a convenience sample of 38 adolescents (12 M; 26 F). Open-ended responses were summarized and visualized in a world cloud generator. 5-point Likert and Visual Analog Scales (VAS) were used to record the closed-ended responses. Descriptive statistics and multivariate analysis of variance were used to analyze questionnaire findings.
Results:
Lollies, apples, and nuts frequently caused problems with FA. The most frequent reason for avoiding certain types of food was worry about appliance breakage, followed by pain and sensitivity. VAS scores indicated that toffee and caramel scored highest (65.1% F and 54.1% M) for discomfort followed by corn on the cob (64.4% F and 48.7% M) and apples (56.6% F and 55.3% M). VAS scores did not differ significantly between the sexes (P > 0.05). Nearly, a quarter of the sample reported that FA negatively affected their eating behaviors, causing pain and discomfort during eating. No sex differences (P > 0.05) were found for negative experiences with food.
Conclusion:
Dietary preferences and experiences of patients undergoing FA treatment were identified concerning a New Zealand diet profile. A future study with a larger sample size will help formulate evidence-based dietary guidelines during FA treatment.
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Affiliation(s)
- Priscilla Lee Xie En
- Department of Orthodontics, Faculty of Dentistry, University of Otago, Dunedin, New Zealand,
| | - O. SoYeon
- Department of Orthodontics, Faculty of Dentistry, University of Otago, Dunedin, New Zealand,
| | | | - Li Mei
- Department of Orthodontics, Faculty of Dentistry, University of Otago, Dunedin, New Zealand,
| | - Mauro Farella
- Department of Orthodontics, Faculty of Dentistry, University of Otago, Dunedin, New Zealand,
| | - Sabarinath Prasad
- Department of Orthodontics, Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University, Dubai, United Arab Emirates,
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Palesik B, Šileikytė K, Griškevičius J, Stonkus R, Šidlauskas A, Lopatienė K. Impact of temperature changes to the adhesion strength of molar tubes: an in vitro study. BMC Oral Health 2022; 22:115. [PMID: 35395793 PMCID: PMC8994271 DOI: 10.1186/s12903-022-02144-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/23/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The main purpose of this was to determine study adhesion strength of molar tubes bonding with a composite adhesive after exposure to a sudden change in temperature (thermal cycles). METHODS The study sample consisted of 40 recently extracted human first permanent molars, which were randomly divided into two groups of 20: group 1 was the experimental group (affected by thermal cycles), and group 2 was the control group. Molar tubes were bonded with a light-cure tube adhesive. The experimental group teeth were dipped 2,000 times in saline at 5 °C and at 55 °C. The control group were immersed in 37 °C saline. Molar tubes for both groups were removed with an adapted Mecmesim Multitesters 2.5-I, and the data were recorded with EMPEROR software. ANOVA was used to calculate and compare the results. RESULTS In the experimental group of the teeth, the maximum force was obtained at 94.2 N and the lowest force was 19.69 N. In the control group of the teeth, the maximum force was obtained at 159.1 N and the lowest force was 28.1 N. In the experimental group, the mean debonding force (59.12 N) was statically significantly smaller than in the control group (79.88 N), p = 0.0345. The forces in the control group were by 1.35 times greater than those in the experimental group. CONCLUSIONS The forces of the adhesion of molar tubes to the tooth surface were reduced after exposure to a sudden change in temperature (thermal cycles). The results were significantly different between the experimental group and the control group.
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Affiliation(s)
- Benedikta Palesik
- Department of Orthodontics, Lithuanian University of Health Sciences, J. Lukšos - Daumanto str. 6, 50106, Kaunas, Lithuania.
| | - Kotryna Šileikytė
- Department of Biomechanical Engineering, VILNIUS TECH, J. Basanavicius Str. 28, Vilnius, Lithuania
| | - Julius Griškevičius
- Department of Biomechanical Engineering, VILNIUS TECH, J. Basanavicius Str. 28, Vilnius, Lithuania
| | - Rimantas Stonkus
- Department of Biomechanical Engineering, VILNIUS TECH, J. Basanavicius Str. 28, Vilnius, Lithuania
| | - Antanas Šidlauskas
- Department of Orthodontics, Lithuanian University of Health Sciences, J. Lukšos - Daumanto str. 6, 50106, Kaunas, Lithuania
| | - Kristina Lopatienė
- Department of Orthodontics, Lithuanian University of Health Sciences, J. Lukšos - Daumanto str. 6, 50106, Kaunas, Lithuania
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Bracket Failure in Orthodontic Patients: The Incidence and the Influence of Different Factors. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5128870. [PMID: 35059463 PMCID: PMC8766193 DOI: 10.1155/2022/5128870] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/15/2021] [Accepted: 12/17/2021] [Indexed: 11/18/2022]
Abstract
Failure of brackets is a common problem in orthodontics. This affects the treatment time, cost, and compliance of the patient. This study was conducted to estimate the bracket failure rate and the related factors for the long term. Methodology. This ambidirectional cohort study included 150 nonsyndromic orthodontic patients undergoing fixed appliance therapy for the last two years. The same patients were followed for 7 months. Different variables related to bracket failure were evaluated. The available data were analyzed descriptively, and the Kaplan-Meier estimate was used to measure the bracket survival rate from the date of bonding to failure. Results. A total of 180 bracket bond failures in the 150 included patients (52.2% males and 47.8% females) with a median age of 17 years (range 10-25 years). 69% of brackets failures were reported within the first 6 months after bonding. About 58.3% of bracket failure was noticed in adolescent patients before the age of 18 years. The majority of the cohort (81.1%) has good oral hygiene. The failure rate in patients with normal overbite was 41.1%, in decreased overbite cases was 15%, while in deep bite cases the failure rate was 43.9% with a statistically significant difference. Adults show less bracket failure (41.7%) than adolescent patients (58.3%). More bracket failure was noted in the lower arch (55%) than the upper arch (45%), and there were more bond failures posteriorly (61%) than on the anterior teeth (39%). Majority (41.1%) of the bracket failed on round NiTi wires. Conclusion. The bracket failure rate was 6.4%, with most bracket failure occurring in the first 6 months after bonding with individual difference. There was more incidence of bond failure in an increased overbite, adolescents, lower arch, posterior teeth, and lighter alignment wires.
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Grazioli G, Hardan L, Bourgi R, Nakanishi L, Amm E, Zarow M, Jakubowicz N, Proc P, Cuevas-Suárez CE, Lukomska-Szymanska M. Residual Adhesive Removal Methods for Rebonding of Debonded Orthodontic Metal Brackets: Systematic Review and Meta-Analysis. MATERIALS 2021; 14:ma14206120. [PMID: 34683722 PMCID: PMC8537998 DOI: 10.3390/ma14206120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/04/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022]
Abstract
Debonding of orthodontic brackets is a common occurrence during orthodontic treatment. Therefore, the best option for treating debonded brackets should be indicated. This study aimed to evaluate the bond strength of rebonded brackets after different residual adhesive removal methods. This systematic review and meta-analysis was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. PubMed, Web of Science, The Cochrane Library, SciELO, Scopus, LILACS, IBECS, and BVS databases were screened up to December 2020. Bond strength comparisons were made considering the method used for removing the residual adhesive on the bracket base. A total of 12 studies were included for the meta-analysis. Four different adhesive removal methods were identified: sandblasting, laser, mechanical grinding, and direct flame. When compared with new orthodontic metallic brackets, bond strength of debonded brackets after air abrasion (p = 0.006), mechanical grinding (p = 0.007), and direct flame (p < 0.001) was significantly lower. The use of an erbium-doped yttrium aluminum garnet (Er:YAG) laser showed similar shear bond strength (SBS) values when compared with those of new orthodontic brackets (p = 0.71). The Er:YAG laser could be considered an optimal method for promoting the bond of debonded orthodontic brackets. Direct flame, mechanical grinding, or sandblasting are also suitable, obtaining clinically acceptable bond strength values.
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Affiliation(s)
- Guillermo Grazioli
- Department of Dental Materials, School of Dentistry, Universidad de la República. Av. General Las Heras 1925, Montevideo 11300, Uruguay;
| | - Louis Hardan
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon; (L.H.); (R.B.)
| | - Rim Bourgi
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon; (L.H.); (R.B.)
| | - Leina Nakanishi
- Graduate Program in Dentistry, School of Dentistry, Federal University of Pelotas, Rua Gonçalves Chaves, 457, Pelotas 96015560, Brazil;
| | - Elie Amm
- Department of Orthodontics, School of Dental Medicine, Saint Joseph University, Beirut 1107 2180, Lebanon;
| | - Maciej Zarow
- “NZOZ SPS Dentist” Dental Clinic and Postgraduate Course Centre—pl. Inwalidow 7/5, 30-033 Cracow, Poland; (M.Z.); (N.J.)
| | - Natalia Jakubowicz
- “NZOZ SPS Dentist” Dental Clinic and Postgraduate Course Centre—pl. Inwalidow 7/5, 30-033 Cracow, Poland; (M.Z.); (N.J.)
| | - Patrycja Proc
- Department of Pediatric Dentistry, Medical University of Lodz, Pomorska 251, 92-213 Lodz, Poland;
| | - Carlos Enrique Cuevas-Suárez
- Dental Materials Laboratory, Academic Area of Dentistry, Autonomous University of Hidalgo State, Circuito Ex Hacienda La Concepción S/N, San Agustín Tlaxiaca 42160, Mexico
- Correspondence: (C.E.C.-S.); (M.L.-S.); Tel.: +48-42-675-74-61 (M.L.-S.)
| | - Monika Lukomska-Szymanska
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska St., 92-213 Lodz, Poland
- Correspondence: (C.E.C.-S.); (M.L.-S.); Tel.: +48-42-675-74-61 (M.L.-S.)
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Lin S, Huang L, Li J, Wen J, Mei L, Xu H, Zhang L, Li H. Assessment of preparation time and 1-year Invisalign aligner attachment survival using flowable and packable composites. Angle Orthod 2021; 91:583-589. [PMID: 33848325 DOI: 10.2319/063020-598.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 12/01/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To compare preparation time and 1-year Invisalign aligner attachment survival between a flowable composite (FC) and a packable composite (PC). MATERIALS AND METHODS Fifty-five participants (13 men and 42 women, mean age ± SD: 24.2 ± 5.9 years) were included in the study. Ipsilateral quadrants (ie, maxillary and mandibular right, or vice versa) of attachments were randomly assigned to the FC group (Filtek Z350XT Flowable Restorative) and the PC group (Filtek Z350XT Universal Restorative) by tossing a coin. The primary outcome was preparation time. The secondary outcome was time to the first damage of an attachment. Preparation times were compared using the paired t-test, and the survival data were analyzed by the Cox proportional hazards model with a shared frailty term, with α = .05. RESULTS The preparation times were significantly shorter with the FC (6.22 ± 0.22 seconds per attachment) than with the PC (32.83 ± 2.16 seconds per attachment; P < .001). The attachment damage rates were 14.79% for the FC and 9.70% for the PC. According to the Cox models, attachment damage was not significantly affected by the attachment material, sex, arch, tooth location, attachment type, presence of overbite, or occurrence of tooth extraction. CONCLUSIONS The use of a FC may save time as compared with the use of a PC. With regard to attachment survival, there was no significant difference between the two composites. None of the covariates of attachment materials (sex, arch, tooth location, attachment type, presence of overbite, oir occurrence of tooth extraction) affected attachment damage.
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Vasudevan A, Antony V, Francis PG, Parayaruthottam P, Shaloob M, TP MH. Influence of Patient Attitude on Bracket Failure Rate: A Prospective Study. JOURNAL OF INDIAN ORTHODONTIC SOCIETY 2021. [DOI: 10.1177/0301574220974350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective: The aim of this study is to assess the influence of general attitude and attitude toward orthodontic treatment on bracket failure rate. Methods and Materials: The sample comprised 128 orthodontic patients of both genders (82 women and 46 men), divided into two groups—adolescents (12-18 years old) and adults (19-25 years old), who underwent fixed orthodontic treatment with metallic braces. Two questionnaires were handed out—one before beginning the treatment and, the second, 6 months after the start of treatment. Both the questionnaires consisted of 12 questions with 5 options each, in which the attitude was scored from 1 to 5. Conclusion: Patients with poor attitude scoring had higher bracket failure rate and vice versa.
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Affiliation(s)
- Amritha Vasudevan
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala
| | - Vincy Antony
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala
| | - PG Francis
- Department of Orthodontics, Mar Baselios Dental College, Kothamangalam, Kerala
| | | | - Muhamed Shaloob
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala
| | - Mohamed Haris TP
- Department of Orthodontics, MES Dental College, Perinthalmanna, Kerala
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Umeh O, Eniola A, Ndukwe A. A 3-year audit of the failure rate of first molar buccal tubes among orthodontic patients in a Nigerian population. NIGERIAN JOURNAL OF MEDICINE 2021. [DOI: 10.4103/njm.njm_179_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Analysing the potential of hydrophilic adhesive systems to optimise orthodontic bracket rebonding. Head Face Med 2020; 16:20. [PMID: 32891153 PMCID: PMC7487826 DOI: 10.1186/s13005-020-00233-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 09/01/2020] [Indexed: 11/24/2022] Open
Abstract
Introduction Bond failure during fixed orthodontic treatment is a frequently occurring problem. As bracket rebonding is associated with reduced shear bond strength, the aim of the present investigation is to analyse the effect of different innovative rebonding systems to identify optimised rebonding protocols for orthodontic patient care. Methods Metallic brackets were bonded to the frontal enamel surfaces of 240 bovine lower incisors embedded in resin bases. Teeth were randomly divided into two major experimental groups: in group 1 a hydrophilic primer (Assure™ PLUS) was compared to commonly used orthodontic adhesives (Transbond XT™, BrackFix®, Grengloo™) and a zero control. In group 2 different rebonding systems were analysed using a hydrophilic primer (Assure™ PLUS), a methyl methacrylate-consisting primer (Plastic Conditioner) and a conventional adhesive (Transbond XT™). All teeth were tested for shear bond strength according to the DIN-13990 standard, the Adhesive Remnant Index and enamel fracture rate. Results The hydrophilic primer enhanced shear bond strength at first bonding (Assure™ PLUS 20.29 ± 4.95 MPa vs. Transbond XT™ 18.45 ± 2.57 MPa; BrackFix® 17 ± 5.2 MPa; Grengloo™ 19.08 ± 3.19 MPa; Meron 8.7 ± 3.9 MPa) and second bonding (Assure™ PLUS 16.76 ± 3.71 MPa vs. Transbond XT™ 13.06 ± 3.19 MPa). Using Plastic Conditioner did not seem to improve shear bond strength at rebonding (13.57 ± 2.94). When enamel etching was left out, required shear bond strength could not be achieved (Plastic Conditioner + Assure™ PLUS 8.12 ± 3.34 MPa; Plastic Conditioner: 3.7 ± 1.95 MPa). Hydrophilic priming systems showed decreased ARI-scores (second bonding: 2.63) and increased enamel fracture rates (first bonding: 55%; second bonding 21,05%). Conclusions Based on the present study we found that rebonding strength could be compensated by the use of hydrophilic priming systems. The additional use of a methyl methacrylate-consisting primer does not seem to enhance shear bond strength. No etching approaches resulted in non-sufficient bond strength.
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Li Y, Mei L, Wei J, Yan X, Zhang X, Zheng W, Li Y. Effectiveness, efficiency and adverse effects of using direct or indirect bonding technique in orthodontic patients: a systematic review and meta-analysis. BMC Oral Health 2019; 19:137. [PMID: 31286897 PMCID: PMC6615229 DOI: 10.1186/s12903-019-0831-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 06/24/2019] [Indexed: 02/05/2023] Open
Abstract
Background The direct and indirect bonding techniques are commonly used in orthodontic treatment. The differences of the two techniques deserve evidence-based study. Materials and methods Randomized controlled trials (RCTs), wherein direct and indirect bonding techniques were used in orthodontic patients were considered. The MEDLINE, EMBASE, CENTRAL and Web of Science databases were searched to identify relevant articles published up to December 2018. Grey literature was also searched. Two authors performed data extraction independently and in duplicate using the data collection form. The included trials were assessed using the Cochrane risk of bias assessment tool. Results Of the 1557 studies screened, 42 full articles were scrutinized and assessed for eligibility. Eight RCTs (247 participants) were finally included for the analyses. The qualitative synthesis showed that no significant difference existed in the accuracy of bracket placement and oral hygiene status between the two bonding techniques. The indirect bonding was found to involve less chairside time but more total working time compared with the direct bonding. The meta-analysis on bond failure rate demonstrated no significant difference between the direct and indirect bonding (RR = 1.13, 95% CI = 0.78–1.64, I2 = 22%, P = 0.50). Consistent results were obtained in the subgroup analyses and sensitivity analyses. Conclusion Weak evidence suggested that the direct and indirect bonding techniques had no significant difference in bracket placement accuracy, oral hygiene status and bond failure rate, for bonding orthodontic brackets. The indirect bonding might require less chairside time but more total working time in comparison with the direct bonding technique. High-quality well-designed randomized controlled trials are needed before a conclusive recommendation could be made. Electronic supplementary material The online version of this article (10.1186/s12903-019-0831-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yanxi Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Li Mei
- Discipline of Orthodontics, Department of Oral Sciences, Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Jieya Wei
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Conservative and Endodontic Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xinyu Yan
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, 14 Renmin South Road Third Section, Chengdu, 610041, China
| | - Xu Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, 14 Renmin South Road Third Section, Chengdu, 610041, China
| | - Wei Zheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, 14 Renmin South Road Third Section, Chengdu, 610041, 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, 14 Renmin South Road Third Section, Chengdu, 610041, China.
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Sukhia RH, Sukhia HR, Azam SI, Nuruddin R, Rizwan A, Jalal S. Predicting the bracket bond failure rate in orthodontic patients: A retrospective cohort study. Int Orthod 2019; 17:208-215. [PMID: 30987959 DOI: 10.1016/j.ortho.2019.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The aim of this study was to determine the risk factors associated with orthodontic bracket bond failure and to develop a prediction equation for orthodontic bracket bond failure rate using the risk factors. This was a retrospective cohort study conducted on a sample of 690 brackets in orthodontic patients aged 10 to 28 years old (mean age 17.97±5.11 years old) visiting a dental hospital. The effect of various parameters of orthodontic bond strength was assessed on bracket failure rate using survival analysis. Parametric (exponential) regression analysis was used to determine the risk factors associated with bracket failure and a prediction equation was formulated to predict the bracket failure rate. The overall mean survival time for the brackets was 3.04 (2.9-3.17) years. The univariate analysis showed a statistically significant (P<0.05) association of bracket material, site, overjet, overbite, incisor and molar classification and age. The multivariate analysis showed a significant interaction between site and side along with bracket material, jaw, overjet and overbite in the model. The risk of bracket failure on the right posterior region is 7.7 times that in the right anterior region when adjusted for all other variables in the model (HR: 7.7; 95% CI: 4.3-13.6). The model including bracket material, jaw, overjet, overbite and interaction between site and side can be used as a predictor of hazard rate for orthodontic bracket failure. Care should be taken in bonding brackets in the posterior region, as their debonding rate is higher as compared to anterior region.
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Affiliation(s)
- Rashna Hoshang Sukhia
- The Aga Khan University and Hospital, Section of Dentistry (Orthodontics), Department of Surgery, Karachi, Pakistan.
| | - Hoshang Rumi Sukhia
- Sir Syed College of Medical Sciences, Principal Dental Section, Karachi, Pakistan
| | - Syed Iqbal Azam
- The Aga Khan University Hospital, Department of Community Health Sciences, Karachi, Pakistan
| | - Rozina Nuruddin
- The Aga Khan University Hospital, Department of Community Health Sciences, Karachi, Pakistan
| | - Azra Rizwan
- The Aga Khan University and Hospital, Department of Medicine, Karachi, Pakistan
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14
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Mavreas D, Cuzin JF, Boonen G, Vande Vannet B. The effect of various adhesives, enamel etching, and base treatment on the failure frequency of customized lingual brackets: a randomized clinical trial. Eur J Orthod 2018; 40:249-253. [PMID: 29016985 DOI: 10.1093/ejo/cjx055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Objectives The aim of this paper was to compare failure differences in precious metal customized lingual brackets bonded with three adhesive systems. Also, differences in failure of non-precious metal brackets with and without a silicatized base layer bonded with the same adhesive, as well as the influence of enamel etching prior to using a self-etching dual cure resin were explored. Materials/methods Five different groups were defined in a semi-randomized approach. Group 1 (IME): Maxcem Elite with 378 Incognito brackets and etched teeth, Group 2 (IMNE): Maxcem Elite with 193 Incognito brackets on non-etched teeth, Group 3 (INE): Nexus+Excite with 385 Incognito brackets, Group 4 (IRE): Relyx with 162 Incognito brackets, Group 5 (HRME) and Group 6 (HNRME): Maxcem Elite with 182 Harmony brackets with silicatized and non-slicatized bases respectively. Bracket failures were recorded over a 12-month period. Results The number of failures during the observation period was small in the various adhesives types of groups, as well as in HRME and HNRME groups, and the comparisons among those groups were non-significant (P > 0.05). A statistically significant difference (P < 0.05) was found between the IME and IMNE groups. Conclusions 1. During the first year of treatment customized lingual brackets failure frequencies (rates) are not different for the three adhesive materials tested. 2. Eliminating the etching stage when using self-etch/self-adhesive adhesives, may lead to a dramatic increase in the failure rates. 3. Silicoating of stainless steel customized lingual brackets does not seem to influence the failure of the bonds.
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Affiliation(s)
- Dimitrios Mavreas
- CHIR- Unit Dentistry - ORHE, department of Orthodontics, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan, Brussel, Belgium
| | - Jean-François Cuzin
- CHIR- Unit Dentistry - ORHE, department of Orthodontics, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan, Brussel, Belgium
| | - Guillaume Boonen
- CHIR- Unit Dentistry - ORHE, department of Orthodontics, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan, Brussel, Belgium
| | - Bart Vande Vannet
- CHIR- Unit Dentistry - ORHE, department of Orthodontics, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Laarbeeklaan, Brussel, Belgium
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Almosa N, Zafar H. Incidence of orthodontic brackets detachment during orthodontic treatment: A systematic review. Pak J Med Sci 2018; 34:744-750. [PMID: 30034451 PMCID: PMC6041531 DOI: 10.12669/pjms.343.15012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/11/2018] [Accepted: 05/13/2018] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES To evaluate the incidence of orthodontic brackets detachment during orthodontic treatment. METHODS Using electronic databases; eligible studies up to January 2018 were retrieved, independently reviewed, and screened. The Coleman Methodology Scoring System (CMS) and Cochrane Collaboration's tool were used to assess quality and risk of bias in the included studies. RESULTS Of the seventeen studies included in the final synthesis, thirteen were categorized as randomized clinical trials (RCTs), one prospective cohort and retrospective survey each, whereas two studies could not be categorized. The number of patients in the selected studies ranged between 19 and 153; the mean age was between 10.5 to 38.7 years, and male to female ratio was 353:495. Almost all studies had a high risk of bias, and more than half of the studies had CMS score of 70 or above. The numbers of brackets examined in the studies ranged between 361 and 3336. The incidence of brackets detachment ranged from 0.6 to 28.3%. CONCLUSIONS The incidence of brackets detachment during orthodontic treatment is high.
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Affiliation(s)
- Naif Almosa
- Dr. Naif Almosa, BDS, NSBO, PhD. Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Hamayun Zafar
- Dr. Hamayun Zafar, PT, PhD. Department of Rehabilitation Sciences, College of Applied Medical Sciences and Rehabilitation Research Chair, King Saud University, Riyadh, Saudi Arabia. Department of Odontology, Clinical Oral Physiology, Faculty of Medicine, Umea University, Sweden
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