Author(s):
1. Nataša Knežević, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
2. Olivera Dolić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
3. Željka Kojić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
4. Valentina Veselinović, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
5. Ognjenka Janković, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina
6. Vladan Mirjanić, Republic of Srpska, Bosnia and Herzegovina
7. Vanja Krčić, Medicinski fakultet Banja Luka , Republic of Srpska, Bosnia and Herzegovina

Abstract:
Introduction: In the tooth bleaching process, the primary focus is often placed on selecting an adequate bleaching technique and optimal agent concentration, while the significance of daily oral hygiene during and after the bleaching treatment is frequently underestimated. The quality of oral hygiene, along with patients' dietary habits, plays a significant role in the immediate success and long-term stability of the achieved tooth color. This study aimed to investigate the influence of oral hygiene, smoking, and the consumption of colored beverages on the success of bleaching endodontically treated teeth. Materials and Methods: The study included 30 endodontically treated teeth. In the first group, teeth were bleached using the walking bleach technique (10 teeth); in the second group, the in-office technique was used (10 teeth); and in the third group, teeth were bleached with a combined technique (10 teeth). Bleaching was performed using 30% carbamide peroxide and 35% hydrogen peroxide. Based on oral hygiene and dietary habits, patients were classified as having good/moderate/poor oral hygiene, as smokers/non-smokers, and as consumers/non-consumers of colored beverages. Before and after the bleaching treatment, the color of all teeth was determined using the Vita Classic shade guide. For statistical analysis, bleached teeth were analyzed based on the scale from the study by Ari et al. Results: Based on Fisher's exact test results, a statistically significant difference (p<0.05) in bleaching success was established among teeth with good, moderate, and poor oral hygiene. However, no statistically significant difference was found between smokers and non-smokers, or between consumers and non-consumers of colored beverages. Conclusion: The effectiveness of non-vital tooth bleaching is affected by the oral hygiene of the patients. However, smoking and colored beverage consumption had no impact on the success of the bleaching process.

Key words:
bleaching, oral hygiene, smoking, colored beverages,bleaching, oral hygiene, smoking, colored beverages,carbamide peroxide, hydrogen peroxide, bleaching, oral hygiene, smoking, colored beverages

Thematic field:
SYMPOSIUM B - Biomaterials and nanomedicine

Date of abstract submission:
18.07.2025.

Conference:
Contemporary Materials 2025 - Savremeni Materijali