scholarly journals Effects of Fluorosis and Self Etching Primers on Shear Bond Strengths of Orthodontic Brackets

2009 ◽  
Vol 03 (03) ◽  
pp. 173-177 ◽  
Author(s):  
Ahmet Yalcin Gungor ◽  
Hakan Turkkahraman ◽  
Necdet Adanir ◽  
Huseyin Alkis
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Universal Testing ◽  
Adhesive Remnant Index ◽  
Halogen Light ◽  
Significant Difference ◽  
Bond Strengths ◽  
Group Ii ◽  
Clinical Changes

ABSTRACTObjectives: To evaluate the effects fluorosis and self etching primers (SEP) on shear bond strengths (SBS) of orthodontic brackets.Methods: A total of 48 (24 fluorosed and 24 non-fluorosed) non-carious freshly extracted human permanent premolar teeth were used in this study. Fluorosed teeth were selected according to the modified Thylstrup and Fejerskov index (TFI), which is based on the clinical changes in fluorosed teeth. Fluorosed and non-fluorosed teeth were randomly assigned to 4 groups of 12 each. In groups I (non-fluorosed teeth) and II (fluorosed teeth), standard etching protocol was used and brackets were bonded with Light Bond. In groups III (non-fluorosed teeth) and IV (fluorosed teeth), Transbond Plus SEP was used and brackets were bonded with Transbond XT Light Cure Adhesive. All specimens were cured with a halogen light. After bonding, SBS of the brackets were tested with Universal testing machine. After debonding, all teeth and brackets in the test groups were examined under 10x magnifications. Any adhesive remained after debonding was assessed and scored according to the modified Adhesive Remnant Index (ARI).Results: ANOVA indicated a significant difference between groups (P<.001). SBS in group II (Light Bond+Fluorosis) were significantly lower than other groups. ARI scores of the groups were also significantly different (P<.001). There was a greater frequency of ARI scores of 1,2 and 3 in group II (Light Bond+Fluorosis).Conclusions: When standard etching protocol was used enamel fluorosis significantly decreased the bond strength of orthodontic brackets. Satisfactory bond strengths were obtained when SEP was used for bonding brackets to the fluorosed teeth. (Eur J Dent 2009;3:173-177)

scholarly journals Effects of Fluorosis and Bleaching on Shear Bond Strengths of Orthodontic Brackets

2007 ◽  
Vol 01 (04) ◽  
pp. 230-235 ◽  
Author(s):  
Necdet Adanir ◽  
Hakan Türkkahraman ◽  
Ahmet Yalçın Güngör
Keyword(s):  
Bond Strength ◽  
Clinical Performance ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Universal Testing ◽  
Bleaching Procedure ◽  
Halogen Light ◽  
Significant Difference ◽  
Bond Strengths ◽  
Clinical Changes

ABSTRACTObjectives: To evaluate the effects of fluorosis and bleaching on shear bond strengths of orthodontic brackets.Methods: A total of 45 (30 fluorosed and 15 non-fluorosed) non-carious freshly extracted human permanent premolar teeth which were extracted for orthodontic reasons and without any caries or visible defects were used in this study. Fluorosed teeth were selected according to the modified Thylstrup and Fejerskov index (TFI), which is based on the clinical changes in fluorosed teeth. First group consisted of 15 fluorosed teeth. Second group of fluorosed teeth were bleached with a 35% hydrogen peroxide office bleaching agent. Third group served as control. No bleaching procedure was applied. Orthodontic brackets were bonded with a light cure composite resin and cured with a halogen light. After bonding, shear bond strengths of the brackets were tested with Universal testing machine.Results: The results showed that fluorosis only and bleaching of fluorosed teeth significantly reduced the bond strengths of the orthodontic brackets (P>.001). Although bleaching of fluorosed teeth decreased the values more, no statistically significant difference was found between fluorosis group and fluorosis+bleaching group (P<.05).Conclusions: Fluorosis and bleaching of fluorosed teeth reduce bracket bond strength to enamel, but the bond strength with these still exceed the minimum 6 to 8 MPa required to expect adequate clinical performance. (Eur J Dent 2007;1:230-235)

scholarly journals Effects of Potassium Nitrate and Oxalate Desensitizer Agents on Shear Bond Strengths of Orthodontic Brackets

2007 ◽  
Vol 77 (6) ◽  
pp. 1096-1100 ◽  
Author(s):  
Hakan Türkkahraman ◽  
Necdet Adanir
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Potassium Nitrate ◽  
Orthodontic Brackets ◽  
Group Iii ◽  
Group I ◽  
Halogen Light ◽  
Significant Difference ◽  
Bond Strengths

Abstract Objective: To evaluate the effects of potassium nitrate and oxalate desensitizer agents on shear bond strengths of orthodontic brackets. Materials and Methods: Forty-five extracted human premolar teeth were randomly assigned to three groups of 15 each. UltraEZ potassium nitrate desensitizer was applied on teeth in the first group, while BisBlock oxalate desensitizer was applied on teeth in the second group. The third group served as a control. Orthodontic brackets were bonded with a light cure composite resin and cured with a halogen light. After bonding, the shear bond strength of the brackets was tested with a universal testing machine. Results: The highest shear bond strengths were measured in Group III. The shear bond strength in Groups I and II was significantly lower than in Group III (P &lt; .001). Significant difference was also found between Group I and Group II (P &lt; .01). Conclusions: Orthodontic brackets bonded to enamel treated with potassium nitrate and oxalate desensitizers showed significantly lower bond strengths than did brackets bonded to untreated enamel.

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 Effects of different bleaching methods on shear bond strengths of orthodontic brackets

2012 ◽  
Vol 83 (4) ◽  
pp. 686-690 ◽  
Author(s):  
Ahmet Yalcin Gungor ◽  
Erhan Ozcan ◽  
Huseyin Alkis ◽  
Hakan Turkkahraman
Keyword(s):  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Group Iii ◽  
Group I ◽  
Human Enamel ◽  
Significant Difference ◽  
Bond Strengths ◽  
Group Ii ◽  
Method Group

ABSTRACT Objective: To evaluate the effects of different bleaching methods on the shear bond strength (SBS) of orthodontic brackets. Materials and Methods: Forty-five freshly extracted premolars were randomly divided into three groups (n  =  15 per group). In group I, bleaching was performed with the office bleaching method. In group II, bleaching was performed with the home bleaching method. Group III served as the control. Orthodontic brackets were bonded with a light cure composite resin and cured with an LED light. After bonding, the SBS of the brackets were tested with a Universal testing machine. Results: Analysis of variance indicated a significant difference between groups (P &lt; .001). The highest values for SBS were measured in group III (20.99 ± 2.32 MPa). The SBS was significantly lower in groups I and II than in group III (P &lt; .001). The lowest values for SBS were measured in group II (6.42 ± 0.81 MPa). SBS was significantly higher in group I than in group II (P &lt; .001). Conclusions: Both of the bleaching methods significantly affected the SBS of orthodontic brackets on human enamel. Bleaching with the home bleaching method affected SBS more adversely than did bleaching with the office bleaching method.

scholarly journals Effect of beverages on surface properties of resin-based sealants

2017 ◽  
Vol 16 ◽  
pp. 1-7
Author(s):  
Bruna Genari ◽  
Vicente Castelo Branco Leitune ◽  
João Henrique Macedo Saucedo ◽  
Susana Maria Werner Samuel ◽  
Fabrício Mezzomo Collares
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Resin Cement ◽  
Control Group ◽  
Resin Cements ◽  
Universal Testing ◽  
Halogen Light ◽  
Significant Difference ◽  
Tooth Surfaces ◽  
Light Curing

Self-adhesive, dual-polymerizing resin cements require no treatment to the prepared tooth surfaces before cementation. Aim: The aim of this study was to evaluate the influence of curing mode on bond strength (BS) of three cementing systems to bovine dentin. Methods: The buccal enamel surfaces of 50 bovine incisors were removed to expose dentin and to flat the surface. The teeth were divided into five groups (n=10), which consisted of two resin cements (Multilink and Clearfil SA Cement) that were tested in dual- (halogen light for 40 s) and self-cured modes, and a control (RelyX ARC). Two cylinders of resin cements (1.0 mm X 0.75 mm) were prepared on each bonded dentin surface. After 24h at 37oC, resin cylinders were subjected to micro-shear testing in a universal testing machine (4411/Instron - 0.5 mm/min). Data were statistically analyzed by two-way ANOVA, Tukey and Dunnett`s test (5%). Results: Multilink showed higher BS than those observed on Clearfil SA. Light-curing resulted in higher BS for both Multilink and Clearfil SA. When Multilink was light-cured, no significant difference on BS was demonstrated between it and RelyX ARC. Conclusions: The highest BS values were obtained in control group and light-cured Multilink resin cement.

scholarly journals Reconditioning of self-ligating brackets

2011 ◽  
Vol 82 (1) ◽  
pp. 158-164 ◽  
Author(s):  
Maria Francesca Sfondrini ◽  
Esmeralda Xheka ◽  
Andrea Scribante ◽  
Paola Gandini ◽  
Giuseppe Sfondrini
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Null Hypothesis ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Shear Mode ◽  
Universal Testing ◽  
Adhesive Remnant Index ◽  
Significant Difference ◽  
Scanning Electron

Abstract Objective: To test the null hypothesis that there is no significant difference in the shear bond strength (SBS) and Adhesive Remnant Index (ARI) scores of new vs reconditioned self-ligating brackets. Materials and Methods: One hundred and twenty permanent extracted bovine teeth were embedded in resin blocks. Three different new and reconditioned self-ligating orthodontic brackets (Smart Clip [3M Unitek]; Quick [Forestadent]; and Damon3MX [Ormco]) were tested. Scanning electron microphotographs of the different new (groups 1, 3, and 5) and reconditioned (groups 2, 4, and 6) bracket bases were taken before starting the experiments. Brackets were then bonded to the teeth using an orthodontic adhesive and were then tested in shear mode using an Instron Universal Testing Machine. ARI scores were then recorded. Statistical analysis was performed to determine significant differences in SBS and ARI Scores. Results: Smart Clip and Damon3MX reconditioned brackets showed significantly lower SBS than did new ones. On the contrary, Quick reconditioned brackets showed significantly higher SBS than did new ones. No significant differences in ARI scores were found after the reconditioning process for the three different brackets tested. Conclusion: The in-office reconditioning procedure alters the SBS of self-ligating brackets, although SBS values still remain clinically acceptable.

Effect of Adhesive Boosters on Bond Strength of Bleached Teeth in Orthodontic Bonding

2021 ◽  
pp. 030157422110044
Author(s):  
I Ranganayakulu ◽  
D Praveen Kumar Varma ◽  
Padma Priya CV ◽  
RSVM Raghu Ram ◽  
K Anand Viswanadh ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Carbamide Peroxide ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Significant Difference ◽  
Maxillary Premolars ◽  
And Control

Objectives: To evaluate and compare the effect of adhesion boosters on shear bond strength (SBS) of orthodontic brackets on bleached teeth. Materials and Methods: A sample of 90 extracted maxillary premolars was equally divided into 2 groups of bleached and non-bleached teeth. Twenty-two percent carbamide peroxide gel was used as an agent for bleaching. Each group was further divided equally into 3 subgroups depending on the type of adhesive booster used (Enhance LC, All-bond 2, and no adhesive booster [control]) and maxillary premolars brackets were bonded. Debonding was done with a universal testing machine, and the SBS was recorded. Results: The SBS of non-bleached teeth was highest for All-bond 2 (14.78 ± 2.47 MPa) followed by Enhance LC (13.15 ± 3.49 MPa) and control (10.30 ± 1.06 MPa). The SBS of bleached teeth was highest for All bond 2 (12.23 ± 1.41 MPa) followed by Enhance LC (11.76 ± 1.71 MPa) and control (9.63 ± 1.06 MPa). All subgroups showed a significant difference in SBS (P = .000) on bleached and non-bleached teeth. The SBS showed a significant difference between the bleached and non-bleached teeth in All-bond 2 group (P = .019). Conclusion: Adhesive boosters increased the SBS of both bleached and non-bleached teeth significantly. Among the two adhesive boosters used, All-bond 2 showed more SBS values.

scholarly journals Push-out bond strength of different mineral trioxide aggregates

2014 ◽  
Vol 08 (03) ◽  
pp. 348-352 ◽  
Author(s):  
Huseyin Ertas ◽  
Ebru Kucukyilmaz ◽  
Evren Ok ◽  
Banu Uysal
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Mineral Trioxide Aggregate ◽  
Human Teeth ◽  
Universal Testing ◽  
Significant Difference ◽  
Bond Strengths ◽  
The Mean ◽  
Post Hoc ◽  
Push Out

ABSTRACT Objective: This study was aimed to evaluate and to compare the push-out bond strength of different brands of mineral trioxide aggregate (MTA) with a calcium enriched mixture cement (CEM). Materials and Methods: Fifteen extracted, single-rooted human teeth were used. The middle-third of the roots were sliced perpendicular to the long axis into 1.00 ± 0.05 mm thick serial slices (15 root × 4 slice = 60 specimen). The specimens were then divided into three groups (n = 20). The standardized root discs were filled with white CEM, ProRoot MTA, MTA-Angelus and wrapped in a serum-soaked gauze. After 3 days at relative humidity, the push-out bond strengths were measured with a universal testing machine. Data were analyzed using one-way analysis of variance and post hoc Tukey tests. Results: The mean push-out bond strength value of the ProRoot MTA group (12.7 ± 2.5 MPa) was the highest and statistically significant difference was recorded between ProRoot MTA and other groups (P < 0.001). There was no significant difference between the mean bond strength of CEM cement (4.6 ± 1.1 MPa) and MTA-Angelus (4.5 ± 1.5 MPa) (P = 0.982). Conclusion: The push-out bond strength of MTA was changed with the brands and ProRoot MTA had the highest push-out bond strength.

scholarly journals The Influence of No-Primer Adhesives and Anchor Pylons Bracket Bases on Shear Bond Strength of Orthodontic Brackets

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Andrea Scribante ◽  
Maria Francesca Sfondrini ◽  
Danilo Fraticelli ◽  
Paola Daina ◽  
Alessandra Tamagnone ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Orthodontic Brackets ◽  
Universal Testing Machine ◽  
Universal Testing ◽  
Adhesive Remnant Index ◽  
Chi Squared ◽  
Mandibular Incisors

Objective. The aim of this study was to compare the shear bond strength (SBS) and adhesive remnant index (ARI) scores of no-primer adhesives tested with two different bracket bases.Materials and Methods. 120 bovine permanent mandibular incisors were divided into 6 groups of 20 specimens. Two brackets (ODP) with different bracket bases (anchor pylons and 80-gauge mesh) were bonded to the teeth using a conventional adhesive (Transbond XT) and two different no-primer adhesive (Ortho Cem; Heliosit) systems. Groups were tested using an instron universal testing machine. SBS values were recorded. ARI scores were measured. SEM microphotographs were taken to evaluate the pattern of bracket bases. Statistical analysis was performed. ANOVA and Tukey tests were carried out for SBS values, whereas a chi-squared test was applied for ARI scores.Results. Highest bond strength values were reported with Transbond XT (with both pad designs), Ortho Cem bonded on anchor pylons and Heliosit on 80-gauge mesh. A higher frequency of ARI score of “3” was reported for Transbond XT groups. Other groups showed a higher frequency of ARI score “2” and “1.”Conclusion. Transbond XT showed the highest shear bond strength values with both pad designs.

scholarly journals A comparative study on effect of different methods of recycling orthodontic brackets on shear bond strength

2020 ◽  
Author(s):  
Purna Prasad Khanal ◽  
Basanta Kumar Shrestha ◽  
Rajiv Yadav ◽  
Sanjay Prasad Gupta
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Group Iv ◽  
Orthodontic Brackets ◽  
Ultrasonic Cleaning ◽  
Group Iii ◽  
Group I ◽  
Adhesive Remnant Index ◽  
Group Ii

Abstract Background: Recycling the old or debonded bracket is one possible alternative to the replacement with new bracket. The aim of this study was to evaluate and compare the effect of different methods of recycling stainless steel orthodontic brackets on shear bond strength.Methods: One hundred twenty human premolars extracted for orthodontic purpose were randomly divided into four groups. Standard MBT (0.022”) brackets, (Leone co., Sesto, Florentine, Florence, Italy) were bonded on buccal surface of all samples with light cured adhesive primer Orthosol (Enlight, Ormco corp., USA) using LED curing unit for 10 seconds. Group I was assigned as control and the brackets of Group II, Group III and Group IV were subjected to recycling by flaming (Gas microtorch: RS Pro, Nozzle, MT 790) ,flaming with sandblasting (Bio-Art sandblaster; Rua Teotônio Vilela, Brazil) and flaming with ultrasonic cleaning (Ultrasonic cleaning unit ,Confident dental equipments Ltd, India) respectively. The recycled brackets were rebonded and final debonding of all brackets was done with universal testing machine (AG-IC/100 KN, Shimadzu, Japan) at a crosshead speed of 0.5mm/min and shear bond strength (MPa) was determined. The adhesive remnant index was evaluated by stereomicroscope at 10X magnification (Olympus corp., Japan). Results: The highest shear bond strength was obtained with Group I (10.35 ± 0.46 MPa), followed by Group III (9.36 ± 0.55 MPa), Group IV (5.97 ± 0.66 MPa) and the least value was obtained with Group II (4.30 ± 0.55 Mpa). Significant differences among the groups were detected by analysis of variance. Tukey post hoc multiple comparison test showed that the shear bond strength of each group was significantly different from one another (p < 0.001). The Chi-square showed statistically significant differences in the adhesive remnant index of the 4 groups (p < 0.001). Conclusions: Shear bond strength of new brackets was significantly higher than that of the recycled brackets. Among recycled brackets, flaming with sandblasting provided adequate shear bond strength, flaming with ultrasonic cleaning provided borderline value for clinical use while flaming alone led to significantly lower value.

Sign in / Sign up

Export Citation Format

Share Document