Comparison of shear bond strength of different bonding materials bonded with primer and without primer - An in vivo study

Rohmetra, Abhimanyu; Gupta, N.K.; Jaiswal, Ajay; Tandon, Ragni; Singh, Kamlesh

doi:10.18231/j.ijodr.2020.012

Cited by 4 publications

(2 citation statements)

References 21 publications

(23 reference statements)

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“…In this way, there is a process of demineralization and dissolution of the structure of hydroxyapatite. The degree of decomposition will depend on several factors: tooth type or orientation of enamel prisms in relation to the surface plane of the tooth (which will depend on the localization of acid, cervical, middle or incisal third of the tooth) (7), the concentration of the applied acid and the time of exposure of the enamel to the action of the acid (8,9).…”

Section: Introductionmentioning

confidence: 99%

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

Mitić,

Todorović,

Mitić

et al. 2024

Acta fac medic Naissensis

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Introduction/Aim. The length of tooth enamel conditioning time and the size of bracket bases are some the factors influencing the bond strength between the two adherents. The aim of this study was to compare the shear bond strength (SBS) between two different types of bonded metal brackets and acid-etched enamel surface in two different times. Material and methods. Forty extracted human premolars were randomly divided into four groups. In groups 1 and 2, metal brackets Topic (Dentaurum, Germany) were bonded after etching with 37% phosphoric acid (Gel, Reliance, USA) for 15 s and 30 s, while in groups 3 and 4, metal brackets Equilibrium mini (Dentaurum, Germany) were bonded after etching for 15 s and 30 s. Brackets were bonded using flowable composite Heliosit Orthodontic (Ivoclar Vivadent, Liechtenstein) and light-cured using a LED lamp. The SBS was measured by an electronic dynamometer at a cross-head speed of 5 mm/min. Results. Statistical analysis revealed that SBS is affected by both bracket type (t = 10.62; p < 0.01) and etching time (t = 2.81; p = 0.008). The Equilibrium mini brackets with previous enamel etching for 30 s showed the highest SBS values of 10.8 ± 0.75 MPa, while the Topic brackets with previous enamel etching for 15 s showed the lowest values of 4.85 ± 0.53 MPa. Conclusion. Increasing the etching time of tooth enamel leads to higher values in bond strength, especially when using a bracket with a smaller base.

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Section: Introductionmentioning

confidence: 99%

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

Mitić,

Todorović,

Mitić

et al. 2024

Acta fac medic Naissensis

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“…Further studies should be carried out to check the force related to Invisalign®. Currently patients are instructed to wear each aligner for 2 weeks [3] . Though degradation of aligner causing the OTM is unclear, but certain evidences suggest that there is a decrease in the magnitude of force transferred to the teeth over time.…”

Section: Introductionmentioning

confidence: 99%

To determine the effect of material fatigue of aligners in oral environment and to describe and quantify the type and amount of Orthodontic tooth movement produced by clear aligners

Rohmetra¹,

Gupta²,

Singh³

et al. 2020

Int. J. Appl. Dent. Sci.

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Introduction:The following observations regarding tooth movement with Invisalign aligners resulted from a randomized and controlled clinical trial 1. In a two-week prescription cycle of wearing an aligner, more orthodontic tooth movement (OTM) was seen in the first week as compared to the second week. 2. The exact expected result from the comparison was not obtained. Different individuals depicted different OTM.The results in this study have certain clinical implications which require further research and a more thorough study. Aim: The primary aim of this study was to determine whether these observations were due to material fatigue of the aligners in the oral environment. The secondary aim of this study was to describe and quantify the type and amount of OTM produced by clear aligners. Material and Method: A single centre prospective clinical trial was completed, comparing 15 subjects treated over a course of eight weeks with a control group of 37 subjects study with similar population demographics and nearly identical study design. An upper central incisor was programmed to move two mm over eight weeks, or 0.5 mm every two weeks, using Invisalign® aligners. The treatment subjects changed to a fresh aligner with the same prescription after one week, and the control subjects wore each aligner for the prescribed two weeks. Every week impressions were taken with polyvinyl siloxane (PVS) and models were fabricated digitally to measure OTM. In addition, initial and final cone beam computed tomography (CBCT) images were obtained from the treatment subjects only, to describe and measure OTM. Result: No significant difference was seen found in OTM in individuals who were wearing the initial aligner for a period of two weeks vs. those individuals who switched to a fresh aligner after a period of one week. The OTM variability in the second week was seen due to the material wear and fatigue present. There was, however, a significant difference in OTM during the first week vs. the second week of any given two-week cycle, for both groups. When OTM was measured from the centre of the clinical crown, the two mm prescription of the aligners was not fully expressed in any of the 15 treated subjects. Conclusion: High variability was observed. In addition, CBCT data indicated that: 1) the target teeth experienced tipping that was uncontrolled in nature, with the median rotation center at 41% of the length of the root apical to the alveolar crest, 2) although only one central incisor was planned to move, the contralateral central incisor felt a reactive force and got rotated in the direction opposite that of the target tooth, 3) seven of the 15 subjects experienced a net anteroposterior (A-P) change of less than 1.9 mm between the midpoint of the incisal edge of the target tooth and the contralateral central incisor, and 4) the results of an exploratory data analysis attempting to correlate biologic variables with OTM revealed some trends, but additional research is required before making conclusions.

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Effect of photopolymerization time on shear bond strength and microleakage of orthodontic adhesives: An in vitro study

Puthiyapurayil,

Antony,

Shaloob

et al. 2024

JIOH

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Aim: The aim of this investigation was to assess the shear bond strength and microleakage of three different adhesives at 10, 15 and 20 s of photopolymerization time. Materials and Methods: Depending on the adhesive employed, 45 teeth were split into 3 groups. (Enlight, Transbond XT and Orthofix) and 3 subgroups based on polymerization time of 10, 15, 20 s. After bonding, the specimens were placed in 0.5% solution of methylene blue dye for 6 days and then the Universal Testing Machine was used to assess the shear bond strength. The debonded specimens were then examined for microleakage using 3D Optical profiler. One-way ANOVA test and repeated-measures ANOVA were used in inferential statistics to determine differences between and within the groups. Results: The mean shear bond strength was found highest for Enlight cured for 20 s (22.45 ± 4.22MPa) and lowest for Orthofix cured for 10 s (4.58 ± 1.60 MPa). In all three groups, there was a discernible rise in shear bond strength as the curing time increased. The mean microleakage was found highest in Orthofix cured for 10 s (0.04 ± 0.007 mm) and lowest in Transbond XT cured for 15 s (0.01 ± 0.002 mm). Mean microleakage decreased with an increase in curing time which was statistically significant in all groups. Conclusions: With an increase in polymerization time, the shear bond strength increases and microleakage decreases. Enlight light cure composite showed maximum shear bond strength and Orthofix showed the least shear bond strength at all three polymerization times. Microleakage at the gingival area was more when compared to the occlusal area in all the groups.

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Comparison of shear bond strength of different bonding materials bonded with primer and without primer - An in vivo study

Cited by 4 publications

References 21 publications

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

The influence of bracket type and etching time on shear bond strength to enamel: An in vitro study

To determine the effect of material fatigue of aligners in oral environment and to describe and quantify the type and amount of Orthodontic tooth movement produced by clear aligners

Effect of photopolymerization time on shear bond strength and microleakage of orthodontic adhesives: An in vitro study

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