Effect of Interbracket Distance on Load-Deflection Property and Resistance to Sliding in Orthodontic Appliances

Perumalla, Kiran Kumar; Sunitha, C; Naveen, R; Tircoveluri, Saritha; Sagar, K

doi:10.1177/0301574219840882

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…The findings of the current study was in disagreement with previous studies that suggested inter-brackets width affects frictional resistance. Some studies reported that reduced inter-brackets distance produced greater frictional resistance, 17,18,23 and others suggested that as the inter-brackets distance reduces, friction reduces, due to reduction in tipping. 24,25 The findings of the current study may be related to the other variables affecting force delivery during molar protraction.…”

Section: Discussionmentioning

confidence: 99%

Comparison of second molar protraction using different timing for piezocision application: A randomized clinical trial

Alhaija

Al-Areqi

Maaitah

2022

Dental Press J. Orthod.

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Objective: To compare second molar protraction between early, late and no piezocision groups. Material and Methods: Forty subjects with bilaterally extracted mandibular first molars were selected to participate in the study. Subjects were subdivided into two groups: piezocision and no piezocision. The piezocision group was further subdivided into two subgroups: early piezocision (piezocision performed immediately before second molar protraction) and late piezocision (piezocision performed three months after starting molar protraction). In the no piezocision group, molar protraction was done without surgery. The intervention (piezocision group and timing of piezocision/side within group) was randomly allocated using the permuted random block size of 2, with 1:1 allocation ratio. The amount of second molar protraction, duration of space closure and anterior anchorage loss were measured. A repeated measures analysis of variance was conducted to define the differences between the measured variables at the different time intervals. Differences between groups were assessed using ANOVA test. Results: No difference was detected between early and late piezocision groups in the amount of molar protraction at the end of space closure. Duration of complete space closure was 9 and 10 months in the piezocision and no piezocision groups. Anchorage loss was similar between the three studied groups. Conclusions: Early and late piezocision have similar effect and both increased the amount of second molar protraction temporarily in the first 2-3 months after surgery. Duration of mandibular first molar space closure was reduced by one month when piezocision was applied. Anchorage loss was similar in the three groups.

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Section: Discussionmentioning

confidence: 99%

Comparison of second molar protraction using different timing for piezocision application: A randomized clinical trial

Alhaija

Al-Areqi

Maaitah

2022

Dental Press J. Orthod.

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Pulpal blood flow changes and pain scores related to using Superelastic 0.018-inch Nickel Titanium as the first orthodontic alignment archwire: a prospective clinical trial

et al. 2021

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Pulpal blood flow changes and pain scores related to using Superelastic 0.018-inch Nickel Titanium as the first orthodontic alignment archwire: a prospective clinical trial Background: Optimal orthodontic force results in maximum rate of tooth movement without tissue damage. Even though starting orthodontic treatment with a thicker archwire may shorten treatment duration, the evidence on the effect of using 0.018-inch NiTi as the first alignment archwire on pulpal blood flow (PBF) status is still scarce. Objectives: to record PBF changes and pain scores associated with using 0.018-inch NiTi as the first alignment archwire during fixed orthodontic treatment. Methodology: Patients were selected from subjects attending postgraduate orthodontic teaching clinics at Jordan University of Science and Technology. In total, forty healthy patients who exhibited mild lower arch crowding were included. A split-mouth trial design was used. Each patient received two archwire sizes at one time joined in the midline by crimpable hook and applied in the lower arch. Patients were assigned into one of two groups based on archwire sizes used. Group 1: 0.014-inch and 0.018-inch NiTi (Six males, 14 females aged 19.4±1.33 years) and Group 2: 0.016-inch and 0.018-inch NiTi (Seven males, 13 females aged 19.6±1.45 years). The archwire size group was randomly allocated with a 1:1 allocation ratio. A Laser Doppler Flowmeter was used to measure PBF at different time intervals (T0-T5). Pain scores were recorded using a visual analogue scale (VAS). A repeated measures ANOVA and a post-hoc Bonferroni comparison tests were conducted to examine differences at the different time points before and during orthodontic alignment. Results: For all studied archwire sizes, PBF decreased 20 minutes after their placement. Most PBF changes occurred within 24hours and continued to decrease until 72 hours after archwire placement where the maximum reduction was reached. Eventually, normal values were reverted within 1 month. PBF changes were similar between all alignment -groups. Conclusions: Initial orthodontic alignment with 0.018inch NiTi does not cause irreversible changes to pulpal vasculature or produces higher pain scores.

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Effect of Interbracket Distance on Load-Deflection Property and Resistance to Sliding in Orthodontic Appliances

Cited by 2 publications

References 17 publications

Comparison of second molar protraction using different timing for piezocision application: A randomized clinical trial

Comparison of second molar protraction using different timing for piezocision application: A randomized clinical trial

Pulpal blood flow changes and pain scores related to using Superelastic 0.018-inch Nickel Titanium as the first orthodontic alignment archwire: a prospective clinical trial

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