scholarly journals The Effect of Different Bracket Base Cleaning Method on Shear Bond Strength of Rebonded Brackets

2013 ◽  
Vol 14 (5) ◽  
pp. 866-870 ◽  
Author(s):  
Emad F Al Maaitah ◽  
Sawsan Alomari ◽  
Elham S Abu Alhaija ◽  
Ahmed AM Saf
Keyword(s):  
Bond Strength ◽  
Failure Mode ◽  
Shear Bond Strength ◽  
Control Group ◽  
Slow Speed ◽  
Cleaning Method ◽  
Adhesive Remnant Index ◽  
Random Samples ◽  
Significant Difference ◽  
Bracket Base

ABSTRACT Aim To assess the effect of different bracket base conditioning method on shear bond strength (SBS) of rebonded brackets. Materials and methods Eighty brackets were bonded to freshly extracted premolar teeth using light cured composite adhesive. SBS was measured for 20 random samples as control group (G1). After debonding, 60 debonded brackets were allocated randomly into three groups of bracket base conditioning methods to remove the remaining adhesives. G2: bracket base cleaned with slow speed round carbide bur (CB), G3: cleaned with ultrasonic scaler (US), G4: cleaned with sandblasting (SB). After that, brackets were rebonded in the same manner as first bonding and SBS was measured. Modified adhesive remnant index (ARI) was recorded for all groups. Results SBS for new brackets was 11.95 MPa followed by 11.65 MPa for G2, 11.56 MPa for G4 and 11.04 MPa for G3 group. There were no statistically significant differences between all groups (p = 0.946). In all groups, failure mode showed that the majority of adhesive composite remained on the bracket base with ARI of 4. There was no statistically significant difference between all groups in ARI (p = 0.584). Conclusion In-office methods; slow speed CB and US are effective, quick and cheap methods for bracket base cleaning for rebonding. How to cite this article Al Maaitah EF, Alomari S, Alhaija ESA, Safi AAM. The Effect of Different Bracket Base Cleaning Method on Shear Bond Strength of Rebonded Brackets. J Contemp Dent Pract 2013;14(5):866-870.

scholarly journals Effect of Different Surface Treatments for Ceramic Bracket Base on Bond Strength of Rebonded Brackets

2015 ◽  
Vol 26 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Monique Kruger Guarita ◽  
Alexa Helena Köhler Moresca ◽  
Estela Maris Losso ◽  
Alexandre Moro ◽  
Ricardo Cesar Moresca ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Silica Coating ◽  
Surface Treatments ◽  
Enamel Surface ◽  
Control Group ◽  
Significant Difference ◽  
Ceramic Brackets ◽  
Ceramic Bracket ◽  
Bracket Base

The aim of this study was to evaluate the shear bond strength of rebonded ceramic brackets after subjecting the bracket base to different treatments. Seventy-five premolars were selected and randomly distributed into five groups (n=15), according to the type of the bracket surface treatment: I, no treatment, first bonding (control); II, sandblasting with aluminum oxide; III, sandblasting + silane; IV, silica coating + silane; and V, silicatization performed in a laboratory (Rocatec system). The brackets were fixed on an enamel surface with Transbond XT resin without acid etching. The brackets were then removed and their bases were subjected to different treatments. Thereafter, the brackets were fixed again to the enamel surface and the specimens were subjected to shear bond strength (SBS) test. The adhesive remnant index (ARI) was then evaluated for each specimen. Data were subjected to ANOVA and Tukey's tests (α=0.05). A statistically significant difference was observed only between Rocatec and the other groups; the Rocatec group showed the lowest SBS values. The highest SBS values were observed for group 1, without any significant difference from the values for groups II, III and IV. Most groups had a higher percentage of failures at the enamel-resin interface (score 1). It was concluded that the surface treatments of rebonded ceramic brackets were effective, with SBS values similar to that of the control group, except Rocatec group.

scholarly journals Effect of two erosive protocols using acidic beverages on the shear bond strength of orthodontic brackets to bovine enamel

2018 ◽  
Vol 23 (6) ◽  
pp. 64-72
Author(s):  
Catielma Nascimento Santos ◽  
Felipe de Souza Matos ◽  
Sigmar de Mello Rode ◽  
Paulo Francisco Cesar ◽  
Flávia Pardo Salata Nahsan ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Artificial Saliva ◽  
Control Group ◽  
Lime Juice ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Microhardness Testing ◽  
Bovine Enamel

Abstract Objective: To assess the short-term effect of two in vitro erosive challenge protocols on the bond strength of metal orthodontic brackets on bovine enamel. Methods: Sixty bovine incisors were selected and randomly divided into six groups: AS7 (artificial saliva - 7 days, Control Group); CC7 (Coca-Cola™ - 7 days); LJ7 (lime juice - 7 days); AS30 (artificial saliva - 30 days, Control Group); CC30 (Coca-Cola™ - 30 days); LJ30 (lime juice - 30 days). Microhardness testing was performed prior to the erosive challenge to verify the standardization of samples. Immersion was performed 4x/day for five minutes, for either 7 or 30 days. After immersions were concluded, the brackets were bonded and shear bond strength was assessed after 48 hours. The Adhesive Remnant Index (ARI) was also assessed. Data were analyzed by two-way ANOVA, followed by Tukey’s post-hoc and Student’s t test for paired samples, and the Kruskal-Wallis non-parametric test (α = 5%). Results: The mean and standard deviation of microhardness testing of total samples were 281.89 ± 44.51 KHN. There was no statistically significant difference in shear bond strength for the time factor (7 or 30 days; F5.54= 0.105; p = 0.901). However, there was a statistically significant difference for the solution factor (F5.54= 6.671; p = 0.003). These differences occurred among solutions of Saliva x Coca-Cola™ (p = 0.003) and Coca-Cola™ x Lime Juice (p= 0.029). The assessment of the Adhesive Remnant Index showed no significant difference between groups. Conclusions: The immersion time used in the erosion protocols did not affect the bond strength of brackets to teeth. Coca-Cola™ induced significantly higher shear bond strength values than lime juice and artificial saliva. However, the short term effects of 7/30 days in this in vitro study may not be extrapolated for in vivo ones. Clinical studies should be conducted, substantiating the laboratory results.

scholarly journals The effect of aluminum oxide sandblasting and discs on shear bond strength of metal brackets rebonded in eroded enamel

2021 ◽  
Vol 10 (13) ◽  
pp. e34101320132
Author(s):  
Luciana de Vasconcelos Leão ◽  
Adriana Oliveira ◽  
Jefferson Chaves Moreira ◽  
Luiz Renato Paranhos ◽  
Sigmar de Mello Rode ◽  
...  
Keyword(s):  
Shear Strength ◽  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Control Group ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Kolmogorov Smirnov

This research aimed to assess the effect of aluminum oxide sandblasting and discs on the bond strength of metal brackets rebonded on artificially eroded enamel. Fifty-four bovine incisors were divided into groups: Control (Artificial Saliva), AlOx (Aluminum oxide sandblasting), and SL (Aluminum oxide discs). They had their enamel surface flattened with Al2O3 discs and a metallographic polisher, then Knoop microhardness was assessed. AlOx and SL specimens were eroded with Coca-Cola™ for 1 minute, 3 times a day for 7 days. Metal brackets were bonded to the tooth. Shear strength was measured by an EMIC universal testing machine (0.5 mm/min). The Adhesive Remnant Index (ARI) was performed after shearing through magnifying glass (10X). Kolmogorov-Smirnov, Levene, homoscedasticity and ANOVA tests were applied to assess microhardness and shear strength (p=0.163). All groups presented shear bond strength with no significant differences. The ARI showed statistically significant difference between the groups. The prevalence for the control group was ARI 3. However for AlOx and SL, ARI 1 and 2 prevailed. The aluminum oxide sandblasting and aluminum oxide discs did not positively increase the bond strength of brackets when bonded to artificially eroded enamel. The ARI indicated that eroded teeth present higher resin adhesion to enamel.

scholarly journals ALTERNATIVE METHOD FOR REBONDED BRACKET CLEANING USING INORGANIC SOLVENT

2018 ◽  
Vol 9 ◽  
pp. 67
Author(s):  
Gina Maringka ◽  
Bambang Irawan ◽  
Ellyza Herda ◽  
Zainal Alim Masud
Keyword(s):  
Organic Solvent ◽  
Organic Solvents ◽  
Shear Bond Strength ◽  
Cleaning Method ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
The Mean ◽  
The One ◽  
One Way Anova ◽  
Bracket Base

Objective: The aim of this study was to prove that organic solvents areas effective and efficient as sandblasting and burning for cleaning rebonded brackets.Methods: Thirty stainless steel metal brackets mounted on 30 maxillary first premolar teeth were categorized into three cleaning method groups, each consisting of 10 brackets. After 24 h, shear bond strength (SBS) tests were performed using a universal testing machine.Results: The one-way ANOVA test showed a significant difference (p=0.000) among the mean SBS values in the three cleaning method groups. However, the modified adhesive remnant index by a Kruskal–Wallis analysis showed no significant difference (p=0.860). The scanning electron microscopy results revealed that the organic solvent cleaning method showed better bracket performance than the other two methods. Moreover, the energy-dispersive X-ray spectroscopy results showed that the adhesive material remaining on the bracket base was relatively similar among the three cleaning methods.Conclusion: Based on practicality and the results of this study, the organic solvent cleaning method was proven to be effective and efficient. Therefore, organic solvents can be recommended as an alternative cleaning method for detached brackets.

scholarly journals Primer-Treated Ceramic Bracket Increases Shear Bond Strength on Dental Zirconia Surface

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4106
Author(s):  
Ga-Youn Ju ◽  
Bum-Soon Lim ◽  
Wonjoon Moon ◽  
Shin-Young Park ◽  
Soram Oh ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Bond Strength ◽  
Bonding Strength ◽  
Shear Bond Strength ◽  
Adhesive Failure ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Ceramic Bracket ◽  
Bracket Base ◽  
Scanning Electron

The purpose of this study is to evaluate the shear bond strength (SBS) of a primer-treated ceramic bracket on dental zirconia and to compare it with conventional ceramic bracket bonding on surface-treated zirconia. Sintered and finished dental zirconia was sandblasted. Samples were divided according to the treated surfaces: no treatment (X), ceramic primer on zirconia (Z), ceramic primer on bracket base (B), and ceramic primer on both zirconia and bracket base (ZB). The ceramic bracket was bonded on zirconia and SBS was measured before (T0) and after 10,000 cycles of thermocycling (Tf). The failed surfaces were examined under field emission scanning electron microscope (FE-SEM), and adhesive remnant index (ARI) was evaluated. SBS was significantly higher in ZB and significantly lower in X in both T0 and Tf. There was no significant difference between Z and B. In X and B, adhesive failure occurred while ZB showed mixed failures. There was no apparent change in the zirconia surface except for the existence of some adhesive and resin remnants. The application of ceramic primer on the bracket base increased the bonding strength to the level of conventional bonding with fewer adhesive remnants. The highest bonding strength was obtained when the primer-treated bracket was bonded on the primer-treated zirconia.

scholarly journals Effect of bracket base design on shear bond strength to feldspathic porcelain

2016 ◽  
Vol 10 (03) ◽  
pp. 351-355 ◽  
Author(s):  
Kazem Dalaie ◽  
Armin Mirfasihi ◽  
Solmaz Eskandarion ◽  
Sattar Kabiri
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Exact Test ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Feldspathic Porcelain ◽  
One Way Anova ◽  
Bracket Base ◽  
Base Design

ABSTRACT Objectives: This study sought to assess the effect of bracket base design on the shear bond strength (SBS) of the bracket to feldspathic porcelain. Materials and Methods: This in vitro, experimental study was conducted on 40 porcelain-fused-to-metal restorations and four different bracket base designs were bonded to these specimens. The porcelain surfaces were etched, silanized, and bonded to brackets. Specimens were thermocycler, incubated for 24 h and were subjected to SBS. Data were analyzed using Shapiro–Wilk test, Levene's test, one-way ANOVA, and Tukey's honest significant difference test. Adhesive remnant index was calculated and compared using Fisher's exact test. Results: One-way ANOVA showed that the SBS values were significantly different among the four groups (P < 0.001). Groups 1, 2, and 4 were not significantly different, but group 3 had significantly lower SBS (P < 0.001). Fractures mostly occurred at the porcelain-adhesive interface in Groups 1 and 2 while in Groups 3 and 4, bracket-adhesive and mixed failures were more common. Conclusion: The bracket base design significantly affects the SBS to feldspathic porcelain.

scholarly journals Effect of saliva contamination and re-etching time on the shear bond strength of a pit and fissure sealant

2004 ◽  
Vol 12 (3) ◽  
pp. 200-204 ◽  
Author(s):  
Gisele Maria Correr ◽  
Angela S. Caldo-Teixeira ◽  
Roberta Caroline Bruschi Alonso ◽  
Regina Maria Puppin-Rontani ◽  
Mário Alexandre Coelho Sinhoreti ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Etching Time ◽  
Control Group ◽  
Distilled Water ◽  
Third Molars ◽  
Fissure Sealant ◽  
Significant Difference ◽  
Pit And Fissure Sealant ◽  
Saliva Contamination

The aim of this study was to evaluate the effect of saliva contamination (SCT) and re-etching time (RET) on the shear bond strength (SBS) of the Fluroshield sealant. Forty-five extracted third molars were sectioned and flattened until reach an enamel surface area. Then, all samples were etched for 30 sec with 35% phosphoric acid and then they were distributed into 9 groups (n=10) according to SCT and RET (seconds), respectively: G1- control (no SCT and no RET); G2- 30s and 0s; G3- 60s and 0s; G4-30s and 2s; G5- 30s and 5s; G6- 30s and 15s; G7-60s and 2s; G8- 60s and 5s; G9- 60s and 15s. The sealant was applied according to the manufacturer's instructions. The samples were stored in distilled water at 37ºC for 72h and subjected to the SBS test. The results indicated that there was no statistically significant difference between the groups (p>0.05). However, it could be noticed that: 1- the longer the SCT, the lower the SBS values; 2 - the longer the RET, the higher the SBS values. It could be concluded that there was a tendency to the shortest SCT (30s) associated to the longest RET (5 and 15s) to reach similar SBS values for the control group.

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 Shear Bond Strength of Brackets Bonded with Self-Etching Primers Compared to Conventional Acid-Etch Technique: A Randomized Clinical Trial

2019 ◽  
Author(s):  
Nasrin Farhadian ◽  
Amirfarhang Miresmaeili ◽  
Vahid Shahidi Zandi
Keyword(s):  
Clinical Trial ◽  
Bond Strength ◽  
Randomized Clinical Trial ◽  
Shear Bond Strength ◽  
Allocation Concealment ◽  
Wilcoxon Test ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Acid Etch ◽  
Registration Number

Objectives: The purpose of this randomized clinical trial (RCT) was to compare the shear bond strength (SBS) of orthodontic brackets bonded to enamel with conventional acid-etch (AE) technique and self-etching primers (SEP). Materials and Methods: Twenty-two patients, requiring extraction of two bicuspids for orthodontic reasons, were recruited. In each individual, following blinding and allocation concealment, one intact premolar received conventional AE, whereas the contralateral premolar received SEP with a split-mouth design. Bonded brackets remained in the oral cavity for two months. Afterward, the teeth were extracted without debonding the brackets. SBS and adhesive remnant index (ARI) were measured using a Universal Instron machine and a stereomicroscope, respectively. Results: The mean SBS of the conventional AE and SEP groups was 9.53 and 9.20 MPa, respectively. Paired t-test showed no statistically significant difference between the two groups (P=0.096). Comparison of ARI between the two groups, using Wilcoxon test, indicated that significantly less adhesive remained on enamel with brackets bonded with SEP compared to brackets bonded with conventional AE (P<0.001) although the SBS was higher in the AE group. Conclusion: The present study indicated that although there is no significant difference in SBS between SEP and conventional AE for bonding orthodontic metal brackets, the amount of residual adhesive on the enamel surface is significantly less with SEP than with conventional AE. (IRCT registration number: IRCT201705099086N3).

scholarly journals Effect of Yd:YAG laser irradiation on the shear bond strength of orthodontic metal brackets

2020 ◽  
Vol 25 (1) ◽  
pp. 28-35
Author(s):  
Fernando César Moreira ◽  
Helder Baldi Jacob ◽  
Luis Geraldo Vaz ◽  
Antonio Carlos Guastaldi
Keyword(s):  
Bond Strength ◽  
Laser Irradiation ◽  
Shear Bond Strength ◽  
Surface Characterization ◽  
Test Machine ◽  
Base Surface ◽  
Bonding Failure ◽  
Significant Difference ◽  
Chi Square Analysis ◽  
Bracket Base

ABSTRACT Objective: The purpose of this study was to evaluate the effect of the Yd:YAG laser irradiation on orthodontic bracket base surface. Shear bond strength (SBS) values and sites of the bonding failure interfaces were quantified. Methods: Brackets were divided into two groups: OP (One Piece - integral sandblast base) and OPL (One Piece - laser irradiation). The brackets were randomly bonded on an intact enamel surface of 40 bovine incisors. The SBS tests were carry out using a universal test machine. A stereomicroscopy was used to evaluate the adhesive remnant index (ARI), and surface characterization was performed by scanning electron microscopy (SEM). Student’s t-test was used to compare the SBS between the two groups (p< 0.05). Frequencies and chi-square analysis were applied to evaluate the ARI scores. Results: OPL group showed higher value (p< 0.001) of SBS than OP group (43.95 MPa and 34.81 MPa, respectively). ARI showed significant difference (p< 0.001) between OPL group (ARI 0 = 100%) and OP group (ARI 0 = 15%). SEM showed a higher affinity between the adhesive and the irradiated laser base surface. Conclusions: Yd:YAG laser irradiation on bracket base increased SBS values, showing that bonding failure occurs at the enamel/adhesive interface. Laser-etched bracket base may be used instead of conventional bases in cases where higher adhesion is required, reducing bracket-bonding failure.

Sign in / Sign up

Export Citation Format

Share Document