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CC BY 4.0 · Eur J Dent 2025; 19(02): 449-456
DOI: 10.1055/s-0044-1795125
Original Article

Debonding Characteristic and Survival Probability of Adhesive Flash-Free Ceramic Orthodontic Brackets Following pH Cycling

Authors

  • Tarek Ahmed Soliman 

    1   Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Ali Robaian

    1   Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Nasser Raqe Alqhtani

    2   Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Abdullah Alshehri

    1   Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Abdullah Saad Alqahtahni

    3   Department of Preventive Dental Sciences, College of Dentistry Prince Sattam Bin Abdulaziz University Al-Kharj, Al-Kharj, Saudi Arabia

  • Ibrahim Saleh Aljulayfi

    4   Prosthetic Dental Science Department, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Magdy Alazzazi

    5   Department of Oral Biology, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt
    6   Oral Histology Department, College of Dentistry, Islamic University, Iraq

  • Ali Elkaffas

    1   Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Shahad Saleh AlGhannam

    7   Dental Hospital, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

  • Sayed Ghorab

    8   Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura City, Egypt

Funding This study is supported via funding from Prince Sattam bin Abdulaziz University project number PSAU/2024/R/1445.
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Abstract

Objectives Orthodontic bracket bond failure is an obstacle in clinical orthodontics. This study investigated the influence of pH cycling on the shear bond strength (SBS), adhesive remnant index (ARI), and survival probability of adhesive-precoated flash-free ceramic brackets.

Materials and Methods Forty mandibular premolars were randomly divided into two groups (n = 20): C: noncoated orthodontic brackets, and F: flash-free adhesive-precoated orthodontic brackets. Each group was subdivided into two subgroups according to storage medium solutions (n = 10): in subgroup AS, specimens were immersed in artificial saliva for 24 hours, and in Subgroup ASL, specimens were recycled between a demineralizing solution and an artificial saliva for 42 days. Within each subgroup, specimens were subjected to SBS and ARI testing. SBS data were analyzed using one-way ANOVA (analysis of variance) and Tukey's post-hoc test. Weibull analysis was performed on the SBS data to determine the characteristic SBS and their survival probabilities.

Results Flash-free adhesive-precoated brackets had higher significant (p < 0.001) SBS values in both the AS group (17.74 ± 1.74 MPa) and the ASL group (12.61 ± 1.40 MPa) compared with the noncoated bracket (10.67 ± 1.55 and 7.89 ± 1.39 MPa, respectively). The ARI scores for the noncoated brackets in the AS group were 70% occurrence for score 1, while 90% for score 1 in the ASL group. For the flash-free precoated brackets, ARI scores were 70% occurrence for score 2 in the AS group, while 80% for score 2 in the ASL group. Flash-free brackets had higher SBS in both AS and ASL groups (14.07 and 9.76 MPa, respectively), at 95% survival probability.

Conclusion Flash-free orthodontic brackets performed better in terms of significantly higher bond strength and higher ARI scores. Meanwhile, noncoated brackets revealed acceptable SBS results in both storage medium groups. Flash-free brackets showed higher survival than the noncoated brackets in both storage medium groups at 90% survival probability.

Keywords

debonding - flash-free adhesive - pH cycling - orthodontics - survival probability

Ethical Approval Statement

Mansoura University Research and Ethical Committee approval has been taken with reference number M0106023DM.




Publication History

Article published online:
30 December 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/)

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