Related Experiment Video
Updated: Aug 7, 2025
09:53
Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
Published on: May 13, 2018
8.4K
Bracket Bond Failures: Incidence and Association with Different Risk Factors-A Retrospective Study
Reda Jakavičė1, Kristina Kubiliūtė1, Dalia Smailienė1
1Department of Orthodontics, Faculty of Odontology, Lithuanian University of Health Sciences, 44307 Kaunas, Lithuania.
Summary
Bracket bond failures in fixed orthodontics are common, especially in younger patients and on lower molars. Increased overbite also significantly raises the risk of bracket loss during treatment.
Area of Science:
- Orthodontics
- Dental Materials Science
- Biomaterials
Background:
- Bracket bond failure is a significant issue in fixed orthodontic treatment.
- Failures impact treatment duration and outcomes.
- Identifying risk factors is crucial for improving treatment success.
Purpose of the Study:
- To determine the frequency of bracket bond failure in orthodontic therapy.
- To identify specific risk factors associated with bracket failures.
Main Methods:
- Retrospective study of 101 patients (age 11-56).
- Mean treatment duration of 30.2 months.
- Binary logistic regression analysis used to calculate risk factors.
Main Results:
- Overall bracket failure rate was 14.65%.
- Higher failure rates observed in younger patients (p=0.003).
- Failures most common on lower arch (66.98%), particularly mandibular molars; increased overbite (p=0.042) and Class II malocclusion were associated with higher failure risk.
Conclusions:
- Younger patients experience more bracket bond failures.
- Mandibular molars and premolars show the highest failure rates.
- Increased overbite and Class II malocclusion are significant risk factors for bracket failure.
More Related Videos
Related Concept Videos
01:11Hazard Rate
153
The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...
153
01:23Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
153
Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
153
01:12Relative Risk
265
Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
265
01:12Hazard Ratio
190
The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial...
For example, in a clinical trial...
190
01:30Criteria for Causality: Bradford Hill Criteria - I
396
The Bradford Hill criteria are a group of principles that provide a framework to determine a causal relationship between a specific factor and a disease. There are nine criteria that are pivotal in assessing causality in epidemiological studies. Here's a closer look at Strength, Consistency, Specificity, and Temporality criteria with definitions and examples:
396
01:12Bonding and Strength of Aggregate
233
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
233