Attitude of Clinical Dental Students to Bleaching of Vital and Non-Vital Teeth

Background: Bleaching is considered the most conservative and cost-effective aesthetic procedure. Vital and non-vital bleaching techniques commonly involve at-home, in-office, and over-the-counter techniques and can be internal (within the pulp chamber) or external (on the enamel surface). Aim: To assess the attitudes of clinical dental students towards the various aspects of tooth bleaching in Saudi Arabia Design and settings: This is an observational cross-sectional study that was carried out across different universities in Saudi Arabia. The study’s questionnaire consisted of questions regarding the demographics and knowledge of dental bleaching procedures, techniques, and materials. Results: A total of 674 dental students and interns from 14 different governmental and private dental colleges in Saudi Arabia completed the survey. The majority of participants were females, 461 (68.4%), attended governmental universities, 396 (58.8%), and did not use any bleaching techniques (62.8%). Dental interns had a higher level of knowledge (42%) followed by 5th-year students (33.7%), and 6th-year students (22.9%). Furthermore, participants who practiced tooth bleaching during clinical training and private universities’ students showed a significantly better bleaching knowledge Conclusion: Overall, dental schools should be encouraging their students to be involved in bleaching application. Additionally, there is a pressing need to focus more on dental bleaching material and procedures in dental school. Keywords: Tooth Bleaching, Dental Students, Bleaching Techniques.

Attitude of Clinical Dental Students to Bleaching of Vital and Non-Vital Teeth: A Cross-Sectional Study

Aim: To assess the attitudes of clinical dental students towards the various aspects of tooth bleaching in Saudi Arabia Methods: This is an observational cross-sectional study that was carried out across different universities in Saudi Arabia. The study’s questionnaire consisted of questions regarding the demographics and knowledge of dental bleaching procedures, techniques, and materials. Descriptive statistics of frequency distribution and percentages were calculated for categorical variables and the Chi-squared test was applied to assess the relationship between categorical variables. Results: A total of 674 dental students and interns from 14 different governmental and private dental colleges in Saudi Arabia completed the survey. The majority of participants were females, 461 (68.4%), attended governmental universities, 396 (58.8%), and did not use any bleaching techniques (62.8%). Dental interns had a higher level of knowledge (42%) followed by 5th-year students (33.7%), and 6th-year students (22.9%). Furthermore, participants who practiced tooth bleaching during clinical training and private universities’ students showed a significantly better bleaching knowledge Conclusion: Overall, dental schools should be encouraging their students to be involved in bleaching application. Additionally, there is a pressing need to focus more on dental bleaching material and procedures in dental school. Keywords: Tooth bleaching, bleaching, techniques, dental students, attitude.

Effect of light and heat on bleaching action of hydrogen peroxide

This study aimed to verify the effect of light and heat on bleaching action of 40% hydrogen peroxide (Opalescence Boost PF – Ultradent, BR). Thirty-three bovine incisors were submitted to in-office dental bleaching and divided into three groups (n=11): CO group – control, no light or heat; CA group – heat with a hairdryer; LC group – light and heat with a photoactivation device. For this, a gingival barrier (OpalDam – Ultradent, SP, BR) isolated a circular area around the flatter region of the crown. Afterwards, the bleaching gel was applied for 15 minutes and repeated twice, totaling 45 minutes of application. For the CA and LC groups, the heat source was maintained during the application of the bleaching gel. Temperature was standardized in 5°C for both groups and monitored using a thermocouple inserted into the pulp chamber. The color measurement was performed before and after bleaching using a spectrophotometer. The inner margin of the isolated area of each dental crown was equivalent to the tip of the spectrophotometer (4 mm). Color change was verified by CIEDE2000 system (ΔE00). One way ANOVA and Tukey's test were used to analyze data (p-values set to 5%). The values of ΔE00 were equal for LC (2,66±0,29) and CA (2,44±0,88), and both were higher than CO (1,31±0,37). Therefore, light does not play a fundamental role for in-office dental bleaching. Same dental bleaching outcomes are obtained using different heat sources.

Case selection in dental bleaching

Dental bleaching is a method of treatment for tooth discoloration that uses hydrogen peroxide in various concentrations. For this dental maneuver to be successful, the etiological diagnosis of dental dyschromia and the treatment plan must be rigorously established. In this article we present the criteria underlying the selection of patients who can benefit from dental bleaching, grouped in a questionnaire. Adequate case selection suitable for teeth whitening, as well as the appropriate choice of the specific bleaching method are essential in obtaining satisfactory aesthetic result for the patient, immediately after completing the treatment, but also in the long term.

Case Reports of Enamel Microabrasion Associated with At-home Dental Bleaching After Orthodontic Bracket Removal

SUMMARY Adequate removal of residual bonded materials from the enamel surface after orthodontic bracket debonding is critical, since any remaining composite may compromise enamel surface morphology and esthetics. The following clinical case reports present the association of at-home dental bleaching using 10% carbamide peroxide and the removal of residual bonded material using a super fine, tapered diamond bur followed by the use of an enamel microabrasion product after orthodontic bracket debonding. The proposed treatment considerably improved the esthetics and successfully removed the grooves created during the removal of the bonding composite, resulting in a smooth enamel surface.

The Role of Epigallocathecin-3-gallate as an Antioxidant After Dental Bleaching on Shear Bond Strength of Composite Resin Restoration

Background: Tooth discoloration can be treated with dental bleaching using Hydrogen peroxide (H2O2). Dental bleaching may interfere with the shear bond strength of composite resins because the remaining free radicals can affect bonding polymerization. Epigallocatcehin-3-gallate (EGCG) as an antioxidant can neutralize the free radicals produced during bleaching process. Purpose: Analyze the role of EGCG antioxidants in increasing the shear bond strength of composite resin after bleaching.. Reviews: Of the seven journals included in this literature review, six journals reported significant difference, and one journal noted no significant difference in the shear bond strength of composite resin following the EGCG application. Conclusion: The use of EGCG can increase the shear bond strength value of post-bleaching composite resin restorations.

Coadministration of ibuprofen/caffeine on bleaching-induced tooth sensitivity: A randomized clinical trial

This clinical trial evaluated the effect of the coadministration of ibuprofen/caffeine on bleaching-induced tooth sensitivity (TS). A triple-blind, parallel-design, randomized clinical trial was conducted on 84 patients who received ibuprofen/caffeine or placebo capsules. The drugs were administered for 48 hours, starting 1 hour before the in-office bleaching. Two bleaching sessions were performed with 35% hydrogen peroxide gel with 1-week interval. TS was recorded up to 48 hours after dental bleaching with a 0-10 visual analogic scale (VAS) and a 5-point numeric rating scale (NRS). The color was evaluated with VITA Classical and VITA Bleachedguide scales (ΔSGU) and VITA Easyshade spectrophotometer (ΔE*ab and ΔE00). The absolute risk of TS in both groups was evaluated using Fischer's exact test. Comparisons of the TS intensity (NRS and VAS data) were performed by using the Mann-Whitney test and a two-way repeated measures ANOVA, respectively. The color alteration between the groups was compared with the Student's t test. The significance level was 5%. There was no statistically significant difference between the groups for the absolute risk of TS (p = 1.00) or for the intensity of TS (p > 0.05). A bleaching of approximately 7 shade guide units was observed on the Vita Classical and Vita Bleachedguide scales, with no statistical difference between the groups. It was concluded that coadministration of ibuprofen and caffeine did not reduce the absolute risk or intensity of TS and did not interfere with the efficacy of dental bleaching.