Quantitative evaluation of the progressive wear of powered interproximal reduction systems after repeated use : An in vitro study.

Christos, Livas; Baumann, Tommy; Flury, Simon; Pandis, Nikolaos (2020). Quantitative evaluation of the progressive wear of powered interproximal reduction systems after repeated use : An in vitro study. Journal of orofacial orthopedics - Fortschritte der Kieferorthopädie, 81(1), pp. 22-29. Springer 10.1007/s00056-019-00200-x

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PURPOSE To evaluate the residual surface roughness of 5 common diamond-coated interproximal reduction (IPR) systems after consecutive in vitro applications in relation to system, diamond grain size, and instrument thickness. METHODS IPR was performed on 80 extracted human incisors using motor-driven strips and discs under predefined conditions. The IPR auxiliaries were applied at 5 consecutive sessions of 20 s on intact interproximal surfaces, and the surface profile (Ra, Rz, Rmax) was analyzed at baseline and after each session with an optical profilometer. RESULTS No overall significant difference in the roughness values was found between systems (P = 0.07 for Ra, P = 0.33 for Rz, and P = 0.48 for Rmax). There was a significant average decrease of Ra, Rz, and Rmax for all systems for every unit increase in time by -0.171 μm (P < 0.001), -3.297 (P ≤ 0.001), and -2.788 μm (P = 0.001), respectively. Ra, Rz, and Rmax values increased significantly, i.e., by 0.194 μm (P = 0.003), 5.890 μm (P = 0.001), and 5.319 μm (P = 0.010) as instrument thickness increased by one unit. No significant reductions in Ra, Rz, and Rmax were observed across grain sizes (-0.008 μm [P > 0.05], -0.244 μm [P > 0.05], and -0.179 μm [P > 0.05], respectively). There was no evidence of interaction between system and time as the P values for Ra, Rz, and Rmax were 0.88, 0.51, and 0.70, respectively. CONCLUSIONS All IPR materials presented significant gradual decrease of surface roughness after repeated applications. There were no significant roughness changes among auxiliaries of different grain sizes. Thinner auxiliaries showed significantly more roughness reduction, possibly requiring more frequent replacement than thick auxiliaries in clinical practice.

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:

Christos, Livas; Baumann, Tommy; Flury, Simon and Pandis, Nikolaos

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1434-5293

Publisher:

Springer

Language:

English

Submitter:

Simon Flury

Date Deposited:

27 Nov 2019 14:23

Last Modified:

16 Jan 2020 01:32

Publisher DOI:

10.1007/s00056-019-00200-x

PubMed ID:

31720733

Uncontrolled Keywords:

Dental enamel Dental high-speed technique Enamel stripping methods Optical profilometer Surface roughness

BORIS DOI:

10.7892/boris.135145

URI:

https://boris.unibe.ch/id/eprint/135145

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