Self-Ligating Brackets in Lingual Orthodontics

Geron, Silvia

doi:10.1053/j.sodo.2007.12.007

Cited by 16 publications

(13 citation statements)

References 7 publications

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“…Specifically, conventional lingual brackets are smaller sized to increase patient's comfort and improve oral hygiene. 1 Almost all lingual brackets are single and have narrower mesiodistal width than buccal brackets because of their anatomical limitations, and because they were projected to provide greater interbracket distance, despite being more susceptible to tipping under traction force. 2 Mechanics work by means of sliding and have the advantage of minimizing the time of closing arch gaps and of reducing the number of activations; however, if teeth are not leveled properly, the increased friction between arches and brackets can generate unexpected dental movements and greater anchorage loss.…”

Section: Introductionmentioning

confidence: 99%

Influence of ligation method on friction resistance of lingual brackets with different second-order angulations: an in vitro study

Pereira

Gimenez

Prieto³

et al. 2016

Dental Press J. Orthod.

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Objective: To evaluate stainless steel archwire static friction in active and passive self-ligating lingual and conventional brackets with second-order angulations. Methods: Two conventional lingual brackets for canines (STb light/Ormco; PSWb/Tecnident), and two self-ligating brackets, one active (In-Ovation L/GAC) and the other passive (3D/ Forestadent), were evaluated. A stainless steel archwire was used at 0°, 3° and 5° angulations. Metal ligatures, conventional elastic ligatures, and low friction elastic ligatures were also tested. A universal testing machine applied friction between brackets and wires, simulating sliding mechanics, to produce 2-mm sliding at 3 mm/minute speed. Results: Two-way analysis of variance demonstrated a significant effect of the interaction between brackets and angulations (p < 0.001). Tukey test indicated that the highest frictional resistance values were observed at 5° angulation for In-Ovation L, PSWb bracket with non conventional ligature, and STb bracket with metal ligature. As for 3D, PSWb with conventional or metal ligatures, and STb brackets with non conventional ligature, showed significantly lower static frictional resistance with 0° angulation. At 0° angulation, STb brackets with metal ties, In-Ovation L brackets and 3D brackets had the lowest frictional resistance. Conclusions: As the angulation increased from 0° to 3°, static friction resistance increased. When angulation increased from 3° to 5°, static friction resistance increased or remained the same. Self-ligating 3D and In-Ovation L brackets, as well as conventional STb brackets, seem to be the best option when sliding mechanics is used to perform lingual orthodontic treatment.

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Section: Introductionmentioning

confidence: 99%

Influence of ligation method on friction resistance of lingual brackets with different second-order angulations: an in vitro study

Pereira

Gimenez

Prieto³

et al. 2016

Dental Press J. Orthod.

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“…Among the above said factors, a modification in the bracket design might reduce the friction and an endeavor to reduce the friction by modifying the bracket design resulted in the development of labial self-ligating brackets. The use of labial self-ligation brackets in lingual orthodontics was introduced by Newman and Holtgrave[ 1 ] in 1999, which was followed with the introduction of various lingual self-ligating brackets.…”

Section: Introductionmentioning

confidence: 99%

In vitro assessment of competency for different lingual brackets in sliding mechanics

2015

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Aim:To determine the static frictional resistance of different lingual brackets at different second order angulations when coupled with stainless steel (SS) archwire in dry and wet conditions.Materials and Methods:Using a modified jig, frictional resistance was evaluated under different conditions for a total of 270 upper premolar lingual brackets (0.018″ × 0.025″ - conventional - 7th generation and STb, self-ligating – evolution) with no in-built tip or torque together with 0.016″ × 0.022″ straight length SS archwires. For conventional brackets, the archwire was secured with 0.008″ preformed SS short ligature ties.Statistical Analysis:One way analysis of variance with Tukey HSD as post-hoc test was applied for degree wise and bracket wise comparison within dry condition and wet condition. For pair wise comparison Student's t-test was used.Results:Under both conditions the static frictional resistance is significantly higher for self-ligating brackets at 0°, while at 5° and 10° it is higher for 7th generation brackets. Statistically, significant difference does not exist at 0° between conventional brackets and the same was found at 5° and 10° between STb and self-ligating brackets. With an increase in second order angulations, all the evaluated samples exhibited an increased frictional value. Wet condition samples obtained a higher value than their corresponding dry condition.Conclusion:The self-ligating bracket evaluated in this in vitro study is not beneficial in reducing friction during en-mass retraction due to its interactive clip type.

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“…On the other hand, the practitioner has also difficulties in the insertion and handling of these appliance [19] and the accuracy to brackets positioning due to anatomical variations in the lingual surface and long chair time for patients and orthodontists [19,20].…”

Section: Disadvantagementioning

confidence: 99%