scholarly journals Comparison of Two Different Orthodontic Bracket Recycling Techniques

2016 ◽  
Vol 6 (2) ◽  
pp. 28-32
Author(s):  
Adith Venugopal ◽  
Harsh Tejani ◽  
Paolo Manzano ◽  
Ronaldo G Vergara
Keyword(s):  
Orthodontic Treatment ◽  
Testing Machine ◽  
Control Group ◽  
Industrialized Countries ◽  
Orthodontic Bracket ◽  
Sand Blasting ◽  
The People ◽  
Bond Strengths ◽  
The Cost ◽  
Bracket Base

Introduction: The cost of orthodontic treatment in most of the industrialized countries may considerably differ from those in third world countries. The lesser cost of orthodontic treatment, high pricing of orthodontic inventory and poor economic conditions of the people strengthen the notion of ‘recycling’ even more.Objectives: To compare the shear bond strengths of .022 slot pre-adjusted edgewise brackets with conventional mesh base design recycled by two different chair-side techniques, one being flaming/heating and other being sandblasting.Materials & Method: The sample involved eighty extracted human premolars with .022 slot pre-adjusted edgewise brackets (Orcmo, USA) bonded onto the lingual surface. After initial de-bonding the bracket base was studied under a scanning electron microscope at different magnifications for aperture size, mesh continuity and surface roughness. The brackets were re-bonded on to the labial surface of the same premolars and then debonded using a Universal Testing Machine to produce a shear force at the tooth bracket interface.Result: The study showed highest bond strengths with the control group (111.52 ± 49.90 N) and least bond strengths with the heating/flaming group (63.71 ± 22.43 N). Reduced aperture dimensions and loss of mesh continuity were characteristics of the Heating group. Sand Blasting showed significantly higher bond strengths (100.42 ± 39.42 N) with considerably rougher mesh surface texture compared to heating group.Conclusion: Sand blasting as a mode to reconditioned orthodontic bracket base provides a higher shear bond strength compared to orthodontic brackets reconditioned by heating/ flaming (p< .01).

scholarly journals Effect of Using Nano and Micro Airborne Abrasive Particles on Bond Strength of Implant Abutment to Prosthesis

2015 ◽  
Vol 26 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Mansour Rismanchian ◽  
Amin Davoudi ◽  
Elham Shadmehr
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Control Group ◽  
Abrasive Particles ◽  
Significant Difference ◽  
Implant Abutments ◽  
Implant Abutment ◽  
Roughened Surface ◽  
Bond Strengths ◽  
Spss Software

Connecting prostheses to the implant abutments has become a concern and achieving a satisfactory retention has been focused in cement-retention prostheses recently. Sandblasting is a method to make a roughened surface for providing more retention. The aim of this study was to compare effects of nano and micro airborne abrasive particles (ABAP) in roughening surface of implant abutments and further retention of cemented copings. Thirty Xive abutments and analogues (4.5 D GH1) were mounted vertically in self-cured acrylic blocks. Full metal Ni-Cr copings with a loop on the top were fabricated with appropriate marginal adaptation for each abutment. All samples were divided into 3 groups: first group (MPS) was sandblasted with 50 µm Al2O3 micro ABAP, second group (NSP) was sandblasted with 80 nm Al2O3 nano ABAP, and the third group (C) was assumed as control. The samples were cemented with provisional cement (Temp Bond) and tensile bond strength of cemented copings was evaluated by a universal testing machine after thermic cycling. The t test for independent samples was used for statistical analysis by SPSS software (version 15) at the significant level of 0.05. Final result showed significant difference among all groups (p<0.001) and MPS manifested the highest mean retention (207.88±45.61 N) with significant difference among other groups (p<0.001). The control group showed the lowest bond strength as predicted (48.95±10.44 N). Using nano or micro ABAP is an efficient way for increasing bond strengths significantly, but it seems that micro ABAP was more effective.

scholarly journals The Impact of Chlorhexidine Mouth Rinse on the Bond Strength of Polycarbonate Orthodontic Brackets

2014 ◽  
Vol 15 (6) ◽  
pp. 688-692 ◽  
Author(s):  
Sukumaran Anil ◽  
Farouk Ahmed Hussein ◽  
Mohammed Ibrahim Hashem ◽  
Elna P Chalisserry
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Test Group ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Mouth Rinse ◽  
Significant Difference ◽  
Bond Strengths ◽  
The Impact

ABSTRACT Objective The purpose of the current in-vivo study was to assess the effect of using 0.12% chlorhexidine (CHX) mouth rinse, before bonding, on shear bond strength of polycarbonate brackets bonded with composite adhesive. Subjects and methods Eighteen orthodontic patients with a mean age 21.41 ± 1.2 years, who were scheduled to have 2 or more first premolars extracted, were included in this study. Patients were referred for an oral prophylaxis program which included, in part, the use of a mouth rinse. Patients were divided into 2 groups, a test group of 9 patients who used 0.12% CHX gluconate mouth rinse twice daily and a control group of 9 patients who used a mouth rinse without CHX, but with same color. After 1 week, polycarbonate brackets were bonded to first premolars with Transbond XT composite adhesive. Premolars were extracted after 28 days and tested for shear bond strength on a universal testing machine. Student's t-test was used to compare shear bond strengths of both groups. Results No statistically significant difference was found in bond strengths’ values between both groups. The test group (with CHX) has mean shear bond strength of 14.21 ± 2.42 MPa whereas the control group (without CHX) revealed a mean strength of 14.52 ± 2.31 MPa. Conclusion The use of 0.12% CHX mouth rinse, for one week before bonding, did not affect the shear bond strength of polycarbonate brackets bonded with Transbond composite. Furthermore, these brackets showed clinically acceptable bond strength. How to cite this article Hussein FA, Hashem MI, Chalisserry EP, Anil S. The Impact of Chlorhexidine Mouth Rinse on the Bond Strength of Polycarbonate Orthodontic Brackets. J Contemp Dent Pract 2014;15(6):688-692.

scholarly journals Variations in orthodontic bracket retention related to base design. Comparison of foil mesh and anchor pylons brackets

2016 ◽  
Vol 69 (6) ◽  
pp. 680-695 ◽  
Author(s):  
Marta Gibas-Stanek ◽  
Stephen Williams ◽  
Wojciech I. Ryniewicz ◽  
Bartłomiej W. Loster
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Bracket ◽  
Significant Difference ◽  
Bonding Properties ◽  
Student’S T ◽  
Plastic Brackets ◽  
Bracket Base ◽  
Base Design

Aim of the study. To compare the shear bond strength of metal brackets with foil mesh (3M, Victory Series), one piece metal brackets (Cannon Ultra) and aesthetic plastic brackets (Cannon Ultra) and to evaluate the sandblasting effect on previously used metal bracket bases regarding their bonding ability. Materials and Methods.A total of seventy human third molars were divided into four groups, and brackets were bonded to the enamel using Transbond XT. After 24 hours of storage, brackets were debonded with Instron Universal Testing Machine® and shear bond strength was recorded. Metal brackets were sandblasted until all visible bonding material was removed from the bracket base and then the bonding procedure and shear bond testing were repeated. Shapiro-Wilk test was used to check normal distribution. Student’s t-test was used to compare the shear bond strength. Results. The shear bond strength of one-piece metal brackets is significantly bigger (18.93MPa) than metal brackets with foil mesh (12.53MPa). Metal brackets in general demonstrate better bonding properties than aesthetic plastic brackets (8.61MPa). There is no statistically significant difference in shear bond strength between new and re-used sandblasted brackets. Conclusions. One-piece brackets with anchor pylons demonstrate better bonding properties but there is a higher risk of enamel damage during debonding of re-used sandblasted brackets.

scholarly journals Comparison of friction produced by two types of orthodontic bracket protectors

2014 ◽  
Vol 19 (1) ◽  
pp. 86-91 ◽  
Author(s):  
Steyner de Lima Mendonça ◽  
Otávio José Praxedes Neto ◽  
Patricia Teixeira de Oliveira ◽  
Patricia Bittencourt Dutra dos Santos ◽  
Fábio Henrique de Sá Leitão Pinheiro
Keyword(s):  
Testing Machine ◽  
In Vitro Study ◽  
Causative Factor ◽  
Control Group ◽  
Orthodontic Appliances ◽  
Orthodontic Bracket ◽  
Fixed Orthodontic Appliances ◽  
Intergroup Comparison ◽  
Level Of Significance

INTRODUCTION: Fixed orthodontic appliances have been regarded as a common causative factor of oral lesions. To manage soft tissue discomfort, most orthodontists recommend using a small amount of utility wax over the brackets in order to alleviate trauma. This in vitro study aimed at evaluating friction generated by two types of bracket protectors (customized acetate protector [CAP] and temporary resin protector [TRP]) during the initial stages of orthodontic treatment. METHODS: An experimental model (test unit) was used to assess friction. In order to measure the friction produced in each test, the model was attached to a mechanical testing machine which simulated maxillary canines alignment. Intergroup comparison was carried out by one-way ANOVA with level of significance set at 5%. RESULTS: The friction presented by the TRP group was statistically higher than that of the control group at 6 mm. It was also higher than in the control and CAP groups in terms of maximum friction. CONCLUSION: The customized acetate protector (CAP) demonstrated not to interfere in friction between the wire and the orthodontic bracket slot.

scholarly journals Applicative Characteristics of a New Zirconia Bracket with Multiple Slots

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Koutaro Maki ◽  
Katsuyoshi Futaki ◽  
Satoru Tanabe ◽  
Mariko Takahashi ◽  
Yuta Ichikawa ◽  
...  
Keyword(s):  
Orthodontic Treatment ◽  
Tooth Movement ◽  
Early Stage ◽  
Control Group ◽  
Dental Arch ◽  
Movement Rate ◽  
Orthodontic Bracket ◽  
Visual Analogue Pain ◽  
Before And After ◽  
Tooth Movement Rate

We have developed a new orthodontic bracket with three slots with lubricative properties on the working surfaces and proposed a new orthodontic treatment system employing 0.012−0.014-inch Ni-Ti arch wires. We recruited 54 patients, of which 27 received treatment with the new zirconia bracket with multiple slots system (M group), and the others received treatment with standard edge-wise appliances (control group [C group]). We compared the (1) tooth movement rate at the early stage of leveling; (2) changes in the dental arch morphology before and after leveling; and (3) pain caused by orthodontic treatment. Student’st-test was used in all assessments. The tooth movement rate in the maxillomandibular dentition was higher in the M group. The basal arch width, anterior length, and the intercanine width in the maxillary dentition were not significantly different in the two groups; however, the intercanine width in the mandibular dentition was higher in the C group. In assessments of treatment-related pain, the visual analogue pain score was 56.0 mm and 22.6 mm in the C and M groups, respectively. A new zirconia bracket with multiple slots system provided better outcomes with respect to tooth movement rate, treatment period, and postoperative pain, thus indicating its effectiveness over conventional orthodontic systems.

scholarly journals Uji pelepasan ion nikel dan kromium pada beberapa braket stainless steel yang direndam di air laut

e-GIGI ◽  
2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Cliff G. Lombo ◽  
P. S. Anindita ◽  
Juliatri .
Keyword(s):  
Stainless Steel ◽  
Orthodontic Treatment ◽  
Soft Tissues ◽  
Sea Water ◽  
Control Group ◽  
Orthodontic Appliance ◽  
Orthodontic Bracket ◽  
Vis Spectroscopy ◽  
Main Components ◽  
Fixed Orthodontic Appliance

Abstract: Orthodontics is the branch of dentistry that studies about how to prevent, protect, and care of malocclusion involving teeth, as well as skeletal and soft tissues of dentofacial region. Fixed orthodontic appliance is one of the means used to achieve the treatment goal. The use of orthodontic bracket is one of the main components in fixed orthodontic treatment which serves to deliver the required force on the teeth. This study aimed to determine the amount of Cr and Ni ions released from the stainless steel bracket (brand A, B, and C) immersed in sea water. This was a laboratory experimental study with a pre-experimental and nonequivalent control group designs. Samples were assayed using UV-Vis spectroscopy to determine the release of the metals: nickel and chromium. The samples consisted of 4 kinds of brand bracket immersed in sea water for 48 hours at a temperature of 37ºC. The results showed that the release of nickel and chromium ions in sea water varied in each sample. In sample A, the release of nickel 0.096 ppm and of chromium 0.202 ppm. In sample B, the release of nickel 0.154 ppm and of chromium 0.027 and. In sample C, the release of nickel 0,066 ppm and of chromium 0,019 ppm. The release of chromium in each sample was higher than the release of nickel. The results showed that there was no particular pattern of the released ions. This might be due to the different composition of the stainless steel brackets depending on the terms of each manufacturer.Keywords: bracket stainless steel, nickel and chromium, UV-Vis spectroscopy, seawaterAbstrak: Ortodonsia adalah cabang dari ilmu kedokteran gigi yang mempelajari tentang cara mencegah, melindungi, dan merawat maloklusi yang melibatkan gigi geligi, skeletal, dan jaringan lunak regio dentofasial. Alat ortodontik cekat merupakan salah satu cara yang digunakan untuk mencapai tujuan perawatan ontodontik. Penggunaan braket ortodonti merupakan salah satu komponen utama dalam perawatan ortodonti cekat yang berfungsi untuk menghantarkan gaya yang diperlukan pada gigi. Penelitian ini bertujuan untuk mengetahui besarnya ion Cr dan Ni yang terlepas pada braket stainless steel merek A, B, dan C yang direndam dalam air laut. Jenis penelitian yang digunakan ialah eksperimental laboratorik dengan rancangan pra eksperimental serta desain penelitian nonequivalent control group. Sampel diuji menggunakan spektroskopi UV-Vis untuk mengetahui pelepasan logam nikel dan cromium. Sampel terdiri dari 4 macam merek braket direndam dalam air laut selama 48 jam pada suhu 37ºC. Hasil penelitian menunjukkan terdapat pelepasan logam nikel dan kromium dalam air laut yang bervariasi di tiap sampel. Sampel A memiliki pelepasan nikel 0,096 ppm dan kromium 0,202 ppm; sampel B memiliki pelepasan nikel 0,154 ppm dan kromium 0,027; sampel C memiliki pelepasan nikel 0,066 ppm dan kromium 0,019 ppm. Pelepasan kromium pada tiap sampel lebih tinggi dibandingkan dengan pelepasan nikel. Hasil penelitian tidak menunjukan pola tertentu. Hal ini dapat disebabkan karena komposisi yang berbeda-beda dari braket stainless steel tergantung ketentuan masing-masing pembuatnya.Kata kunci: braket stainless steel, nikel dan cromium, spektroskopi UV-Vis, air laut

scholarly journals Bond Strength of Orthodontic Brackets to Temporary Crowns: In Vitro Effects of Surface Treatment

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Suliman Y Shahin ◽  
Tahani H. Abu Showmi ◽  
Sadeem H. Alzaghran ◽  
Hoda Albaqawi ◽  
Latifah Alrashoudi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Orthodontic Treatment ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Control Group ◽  
Number Of Patients ◽  
Conventional Manner

Background. The number of patients seeking orthodontic treatment has been consistently increasing. During orthodontic treatment, it is recommended to place the provisional restoration and to delay the final restoration until completion of orthodontic treatment. Recurrent bracket debonding necessitates orthodontists to prepare the bonding area with special measures. Objective. This study aimed to evaluate the effect of different grit sizes of diamond burs and sandblasting surface treatment on the shear bond strength of orthodontic brackets to provisional crowns. Materials and Methods. A total of 75 discs were fabricated from a bisacrylic composite and divided into 5 groups (n = 15) according to surface treatment by black, blue, and green diamond burs and sandblasting in addition to a control group. Metal orthodontic brackets were bonded to discs in a standardized conventional manner. All specimens were subjected to thermocycling with 5000 cycles of alternating 5°C and 55°C waterbaths. The shear bond strength test was performed using a universal testing machine. A scanning electron microscope (SEM) was used to analyze the surface treatment effect and features of debonded surfaces. The amount of composite resin left on the specimen surfaces was analyzed and classified with the adhesive remnant index. One-way ANOVA was performed at α = 0.05. Results. The shear bond strength of specimens treated with sandblasting was significantly higher than that of the control group under thermal aging conditions ( p = 0.022 ), as well as blue burs ( p = 0.001 ), while no significant differences were found between different grit diamond burs and the controls ( p > 0.05 ). Conclusion. Under thermocycling conditions, sandblasting of provisional crowns increases the bond strength of orthodontic brackets.

scholarly journals Influence of Primekote® polymer in orthodontic bonding

2017 ◽  
Vol 46 (2) ◽  
pp. 61-65
Author(s):  
Eduardo Otero Amaral VARGAS ◽  
Cinthia Candemil NUERNBERG ◽  
José Vinicius Bolognesi MACIEL ◽  
Ana Maria BOLOGNESE
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Clinical Performance ◽  
Testing Machine ◽  
Adhesive System ◽  
Test Sample ◽  
Wilcoxon Test ◽  
Tooth Surface ◽  
Control Group ◽  
Orthodontic Bracket

Abstract Objective The Primekote® (TP) polymer was incorporated to the of Orthodontic Bracket mesh base to improve bond strength and make it more efficient. The purpose of this study was to assess the shear bond strength and adhesive remnant index (ARI) of these brackets. Material and method The test sample consisted of thirty bovine incisors divided into 2 groups: with a group with TP® brackets (n=15), and a control group with Morelli® brackets (n=15) without Primekote® technology. The TransbondTM XT was used as adhesive system in both groups, following the same protocol and manufacturer’s instructions. Specimens were stored in distilled water for 24 hours and then submitted to shear bond strength test in a universal testing machine (EMIC DL2000). The assessment of ARI was performed under stereomicroscope by two calibrated examiners. Result No significant differences (p>0.05) in shear bond strength were found between the two groups according to the independent t-test. The Wilcoxon test was used to assess ARI data and statistical difference was found between Morelli® and TP® Nu-Edge brackets; the last one left less remaining adhesive on tooth surface. Conclusion TP® brackets had higher adherence to the adhesive system as shown by lower ARI scores, but this does not improve its clinical performance.

scholarly journals Are the low-shrinking composites suitable for orthodontic bracket bonding?

2013 ◽  
Vol 07 (03) ◽  
pp. 284-288 ◽  
Author(s):  
Suleyman Kutalmis Buyuk ◽  
Kenan Cantekin ◽  
Sezer Demirbuga ◽  
Mehmet Ali Ozturk
Keyword(s):  
Shear Bond Strength ◽  
Testing Machine ◽  
Test Group ◽  
Control Group ◽  
Chi Square ◽  
Orthodontic Bracket ◽  
Adhesive Remnant Index ◽  
The Mean ◽  
And Control ◽  
Adhesive Materials

ABSTRACT Purpose: To evaluate the shear bond strength (SBS), adhesive remnant index (ARI), and microleakage of low-shrinking and conventional composites used as an orthodontic bracket bonding adhesive. Materials and Methods: A hundred twenty non-caries human premolars, extracted for orthodontic purposes, were used in this study. Sixty of them were separated into two groups. Brackets were bonded to the teeth in the test group with Silorane (3M-Espe) and control group with Transbond-XT (3M-Unitek). SBS values of these brackets were recorded in MPa using a universal testing machine. ARI scores were determined after the failure of brackets. The remaining 60 teeth were divided into two groups and microleakage was evaluated by the dye penetration method. Statistical analyses were performed by Wilcoxon, Pearson Chi-square, and Mann-Whitney U tests at P < 0.05 level. Results: The mean SBS for Transbond XT was significantly greater than low-shrinking composite (P < 0.001). Significant differences (χ2 =29.60, P < 0.001) were present between the two groups for the ARI scores. Microleakage values were lower in low-shrinking composite than in the control group, and this difference was found to be statistically significant (P < 0.001). Conclusions: Although low-shrinking composite produced insufficient SBS and ARI scores, microleakage values were lower in low-shrinking composite than in the control group on the etched enamel surfaces, when used as a bracket bonding composite.

scholarly journals Effect of Trichloromethane on the Bond Strengths between Acrylic Teeth and Different Heat-cured Denture Bases: A Comparative Study

2012 ◽  
Vol 13 (6) ◽  
pp. 850-855
Author(s):  
N Venugopal Rao ◽  
D Lakshmayya Naidu ◽  
JSV Bharat ◽  
M Venugopal Reddy ◽  
P Naveen
Keyword(s):  
Bond Strength ◽  
Comparative Study ◽  
Testing Machine ◽  
Control Group ◽  
Denture Base ◽  
Significant Difference ◽  
Base Resin ◽  
Bond Strengths ◽  
Group 2 ◽  
Denture Base Resin

ABSTRACT Aim This study is to evaluate the role of 1:1 v/v 30% trichloromethane and monomer solvent in enhancing the durability of bonding between cross-linked acrylic teeth and different heatcured denture bases with or without mechanical preparations made on ridge lap portion of the artificial teeth. Materials and methods Two high impact denture base resin materials (Trevalon HI, DeTrey, UK, and DPI Tuff, Mumbai) and one nonhigh impact denture base resin material (DPI Quick Set, Mumbai) were selected to form three groups. Each group contains 30 specimens prepared by five different methods. A mixture of 30% trichloromethane and monomer, mixed in the ratio of 1:1 and applied for 1 minute on the ridge lap area of experimental specimens of methods—B, C, D and E (Specimens of method—A being control group, where no alterations were made at the ridge lap portion of acrylic teeth) before curing. Hounsfield universal testing machine is employed to evaluate the comparative bond strengths. Results No significant difference was seen in bond strengths between specimens of experimental methods in all groups. When each group was assessed separately method B specimens in group 1 (739.2 N), group 2 (758 N) and method D specimens in group 3 (729 N) showed highest mean bond strengths. Control group specimens showed the least bond strength (400-460 N) in all groups with more adhesive failures. Conclusion Ridge lap portion of the specimens treated with chemical solvent as in method B showed increased bond strength in groups 1 and 2. Hence, this is a preferred method. Clinical significance Evaluation of effect of different chemical and mechanical preparations at the ridge lap areas of acrylic teeth before acrylization helps the clinician and technician to overcome the problem of debonding of teeth from denture bases and in turn provides better quality prosthesis to the patient. How to cite this article Bharat JSV, Naidu DL, Reddy MV, Naveen P, Rao NV. Effect of Trichloromethane on the Bond Strengths between Acrylic Teeth and Different Heat-cured Denture Bases: A Comparative Study. J Contemp Dent Pract 2012;13(6):850-855.

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