Enamel loss and adhesive remnants following bracket removal and various clean-up procedures in vitro

Ryf, Sacha; Flury, Simon; Palaniappan, Senthamaraiselvi; Lussi, Adrian; van Meerbeek, Bart; Zimmerli, Brigitte (2012). Enamel loss and adhesive remnants following bracket removal and various clean-up procedures in vitro. European journal of orthodontics, 34(1), pp. 25-32. Oxford: Oxford University Press 10.1093/ejo/cjq128

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This study evaluated the enamel loss and composite remnants after debonding and clean-up. The tested null hypothesis is that there are no differences between different polishing systems regarding removing composite remnants without damaging the tooth surface. Brackets were bonded to 75 extracted human molars and removed after a storage period of 100 hours. The adhesive remnant index (ARI) was evaluated. The clean-up was carried out with five different procedures: 1. carbide bur; 2. carbide bur and Brownie and Greenie silicone polishers; 3. carbide bur and Astropol polishers; 4. carbide bur and Renew polishers; and 5. carbide bur, Brownie, Greenie and PoGo polishers. Silicone impressions were made at baseline (T0) and after debonding (T1) and polishing (T2) to produce plaster replicas. The replicas were analysed with a three-dimensional laser scanner and measured with analytical software. Statistical analysis was performed with the Kruskal-Wallis test and pairwise Wilcoxon tests with Bonferroni-Holm adjustment (α = 0.05). Enamel breakouts after debonding were detectable in 27 per cent of all cases, with a mean volume loss of 0.02 mm(3) (±0.03 mm(3)) and depth of 44.9 μm (±48.3 μm). The overall ARI scores was 3 with a few scores of 1 and 2. The composite remnants after debonding had a mean volume of 2.48 mm(3) (±0.92 mm(3)). Mean volume loss due to polishing was 0.05 mm(3) (±0.26 mm(3)) and the composite remnants had a mean volume of 0.22 mm(3) (±0.32 mm(3)). There were no statistically significant differences in volumetric changes after polishing (P = 0.054) between the different clean-up methods. However, sufficient clean-up without enamel loss was difficult to achieve.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics
04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry

UniBE Contributor:

Ryf, Sacha; Flury, Simon; Lussi, Adrian and Zimmerli, Brigitte

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0141-5387

Publisher:

Oxford University Press

Language:

English

Submitter:

Eveline Carmen Schuler

Date Deposited:

04 Oct 2013 14:30

Last Modified:

27 Apr 2018 10:00

Publisher DOI:

10.1093/ejo/cjq128

PubMed ID:

21228118

Web of Science ID:

000299746200004

BORIS DOI:

10.7892/boris.11213

URI:

https://boris.unibe.ch/id/eprint/11213 (FactScience: 217203)

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