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Failure patterns of different bracket systems and their influence on treatment duration: A retrospective cohort study


Stasinopoulos, Dimitrios; Papageorgiou, Spyridon N; Kirsch, Frank; Daratsianos, Nikolaos; Jäger, Andreas; Bourauel, Christoph (2018). Failure patterns of different bracket systems and their influence on treatment duration: A retrospective cohort study. Angle Orthodontist, 88(3):338-347.

Abstract

OBJECTIVES
To compare the failure pattern of four different bracket types and to assess its effect on treatment duration.
MATERIALS AND METHODS
A total of 78 white patients (28 male, 50 female) with a mean age of 12.6 years were included in this retrospective cohort study and treated for a mean period of 30.6 months. The patients were treated in a private practice with stainless steel conventionally ligated brackets, ceramic conventionally ligated brackets, stainless steel self-ligating brackets, or nickel-free self-ligating brackets. The loss of at least one bracket during the course of treatment was analyzed with Cox proportional hazards survival analyses and generalized linear regression.
RESULTS
The overall bracket failure rate at the tooth level was 14.1% (217 brackets), with significant differences according to tooth type (between 8.0%-23.4%) and bracket type (between 11.2%-20.0%). After taking confounders into account, patients treated with ceramic brackets lost more brackets (hazard ratio = 1.62; 95% confidence interval = 1.14-2.29; P = .007) than patients with stainless steel brackets. On average, treatment time increased by 0.6 months (95% confidence interval = 0.21-1.05; P = .004) for each additional failed bracket.
CONCLUSIONS
Bracket failure was more often observed with ceramic brackets and was associated with increased treatment duration.

Abstract

OBJECTIVES
To compare the failure pattern of four different bracket types and to assess its effect on treatment duration.
MATERIALS AND METHODS
A total of 78 white patients (28 male, 50 female) with a mean age of 12.6 years were included in this retrospective cohort study and treated for a mean period of 30.6 months. The patients were treated in a private practice with stainless steel conventionally ligated brackets, ceramic conventionally ligated brackets, stainless steel self-ligating brackets, or nickel-free self-ligating brackets. The loss of at least one bracket during the course of treatment was analyzed with Cox proportional hazards survival analyses and generalized linear regression.
RESULTS
The overall bracket failure rate at the tooth level was 14.1% (217 brackets), with significant differences according to tooth type (between 8.0%-23.4%) and bracket type (between 11.2%-20.0%). After taking confounders into account, patients treated with ceramic brackets lost more brackets (hazard ratio = 1.62; 95% confidence interval = 1.14-2.29; P = .007) than patients with stainless steel brackets. On average, treatment time increased by 0.6 months (95% confidence interval = 0.21-1.05; P = .004) for each additional failed bracket.
CONCLUSIONS
Bracket failure was more often observed with ceramic brackets and was associated with increased treatment duration.

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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:May 2018
Deposited On:18 Mar 2019 09:39
Last Modified:17 Sep 2019 20:18
Publisher:E.H Angle Education and Research Foundation
ISSN:0003-3219
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.2319/081817-559.1
PubMed ID:29394090

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