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Comparative assessment of clinical performance of esthetic bracket materials


Gkantidis, N; Zinelis, S; Karamolegkou, M; Eliades, T; Topouzelis, N (2012). Comparative assessment of clinical performance of esthetic bracket materials. Angle Orthodontist, 82(4):691-697.

Abstract

Abstract Objectives: To compare the alterations in esthetic appearance and slot morphology/integrity of two main types of esthetic brackets caused after clinical use. Materials and Methods: Sixteen ceramic (CR) and 16 plastic (PR) central incisor brackets were obtained from 16 young adult patients at the end of treatment in a prospective randomized manner. As controls, 12 ceramic (CC) and 12 plastic (PC) nonused brackets were also examined. Three representative slot width measurements were obtained through micrometric microscopy. Visual inspection of optical microscopy images, surface electron microscopy (SEM), and energy-dispersive x-ray spectroscopy (EDS) were also performed. Results: Intraoral exposure time varied from 5 to 20 months (mean, 12.4; P  =  .73). Two-way analysis of variance revealed significant differences in slot width among the different materials and a significant interaction between the material effect and its status (P < .001). Bonferroni post hoc tests on material × status effect showed significant differences between CC (95% confidence interval [CI]: 434.5, 447.0) vs PC (95% CI: 460.2, 472.8), CC vs CR (95% CI: 453.2, 464.4), and PC vs PR (95% CI: 448.8, 458.9). Interestingly, a significant difference was not detected for CR vs PR. Slot width was correlated with the time under clinical use only for plastic brackets (PR: r  =  -.64, P < .01). Visual inspection of the optical microscopy images did not reveal any major macroscopic morphological disfigurements or significant discolorations. However, a rough and irregular slot wall surface was evident after clinical use (also with SEM), especially in the bottom of the slot. Conclusions: Both bracket types presented adequate clinical performance at least for the time period studied and in terms of esthetic appearance and morphologic integrity.

Abstract Objectives: To compare the alterations in esthetic appearance and slot morphology/integrity of two main types of esthetic brackets caused after clinical use. Materials and Methods: Sixteen ceramic (CR) and 16 plastic (PR) central incisor brackets were obtained from 16 young adult patients at the end of treatment in a prospective randomized manner. As controls, 12 ceramic (CC) and 12 plastic (PC) nonused brackets were also examined. Three representative slot width measurements were obtained through micrometric microscopy. Visual inspection of optical microscopy images, surface electron microscopy (SEM), and energy-dispersive x-ray spectroscopy (EDS) were also performed. Results: Intraoral exposure time varied from 5 to 20 months (mean, 12.4; P  =  .73). Two-way analysis of variance revealed significant differences in slot width among the different materials and a significant interaction between the material effect and its status (P < .001). Bonferroni post hoc tests on material × status effect showed significant differences between CC (95% confidence interval [CI]: 434.5, 447.0) vs PC (95% CI: 460.2, 472.8), CC vs CR (95% CI: 453.2, 464.4), and PC vs PR (95% CI: 448.8, 458.9). Interestingly, a significant difference was not detected for CR vs PR. Slot width was correlated with the time under clinical use only for plastic brackets (PR: r  =  -.64, P < .01). Visual inspection of the optical microscopy images did not reveal any major macroscopic morphological disfigurements or significant discolorations. However, a rough and irregular slot wall surface was evident after clinical use (also with SEM), especially in the bottom of the slot. Conclusions: Both bracket types presented adequate clinical performance at least for the time period studied and in terms of esthetic appearance and morphologic integrity.

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6 citations in Web of Science®
8 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Orthodontics and Pediatric Dentistry
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2012
Deposited On:23 Feb 2012 08:09
Last Modified:05 Apr 2016 15:40
Publisher:Allen Press
ISSN:0003-3219
Publisher DOI:https://doi.org/10.2319/092511-605.1
PubMed ID:22229823
Permanent URL: https://doi.org/10.5167/uzh-60129

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