Abstract

BackgroundThis study aims to develop a novel process to establish a standardized manufacturing technique of customized esthetic ceramic bracket system (CCB) which could be endowed with individual color and shape to satisfy patients’ individual demands. Material characteristics and mechanical parameters of CCB were evaluated.Subjects and methodsCCB virtual models were designed individually according to patient’s teeth morphology and clinical demands. 3D printing technology, lost-wax technology, and selected glass-ceramic ingots were employed to fabricate CCB. Scanning electron microscopy (SEM) analyses were performed to characterize the surface morphology of CCB and commercially available brackets (Clarity Advanced; Crystalline VII; Inspire ICE; Damon Q). Static and kinetic frictional resistance (FR), shear bond strength (SBS) and adhesive remnant index (ARI) scores were recorded. One-way analyses of variance (ANOVA) and post-hoc Tukey’s HSD multiple tests were used for statistical analyses.ResultsMulti-color and multi-transparency raw materials facilitated CCB with a wide range of color options and controllable optical properties to satisfy different esthetic demands of individual orthodontic patients. CCB presented same level of FR as commercially available ceramic brackets did. No significant differences (P ≥ 0.05) of SBS were observed among CCB-ES (treated silane), Clarity Advanced and Crystalline VII groups, and CCB-E (no silane) attained the highest ARI mean score 3. In the preliminary clinical trial, CCB presented excellent color-matching and shape-matching appearances similar to natural teeth, which made it highly invisible from social intercourse distance.ConclusionsCCB were demonstrated to be an applicable labial orthodontic bracket system with optimized esthetics and biomechanics. We envision that it would be an ideal alternative for patients who pursue esthetic orthodontic treatment but were not likely to take lingual appliances or clear aligners.

Highlights

  • No significant differences (P ≥ 0.05) of shear bond strength (SBS) were observed among ceramic bracket system (CCB)-ES, Clarity Advanced and Crystalline VII groups, and CCB-E attained the highest adhesive remnant index (ARI) mean score 3

  • CCB were demonstrated to be an applicable labial orthodontic bracket system with optimized esthetics and biomechanics. We envision that it would be an ideal alternative for patients who pursue esthetic orthodontic treatment but were not likely to take lingual appliances or clear aligners

  • As it happens in contemporary dentistry, orthodontics is undergoing significant development attributed to digital technologies, which influences the diagnosis, planning and the entire process of orthodontic treatment [1, 2]

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Summary

Introduction

As it happens in contemporary dentistry, orthodontics is undergoing significant development attributed to digital technologies, which influences the diagnosis, planning and the entire process of orthodontic treatment [1, 2]. A novel customized system allows for assessment of changes in 3D and customization of treatment planning brackets, and wires by means of intraoral scanning, Yang et al Progress in Orthodontics (2019) 20:39 there are reports that lingual brackets still induce discomfort in a certain proportion of patients [11, 12]. The esthetic performances of ceramic brackets are influenced by optical properties of patients’ teeth. No customized ceramic appliances manufacturing technique has been well-established, even though various brands of commercially available ceramic brackets, e.g. Clarity Advanced, Inspire ICE, Crystalline VII, InVu, have been employed for decades. This study aims to develop a novel process to establish a standardized manufacturing technique of customized esthetic ceramic bracket system (CCB) which could be endowed with individual color and shape to satisfy patients’ individual demands.

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