Effectiveness and color stability of bleaching techniques on blood-stained teeth: An in vitro study.
J Esthet Restor Dent
; 34(2): 342-350, 2022 03.
Article
en En
| MEDLINE
| ID: mdl-34859941
ABSTRACT
OBJECTIVE:
Evaluate the effectiveness and color stability of bleaching techniques on blood-stained teeth. MATERIAL ANDMETHODS:
The teeth were stained by blood and allocated to groups walking bleach, inside/outside, and in-office bleaching. L*, a*, b*, C*, h° color coordinates were measured using a clinical spectrophotometer at baseline, weekly (T1-T2-T3), and at 1-week (T4), 6-months (T5), and 1-year (T6) follow-up evaluations. ΔEab* , ΔE00 , and ΔWID were calculated between sequential evaluation timepoints and between baseline and each evaluation timepoint. Color coordinates and WID differences in each timepoint and technique were analyzed by Wilcoxon Signed Rank, Kruskal-Wallis and Mann-Whitney U test, respectively. ΔEab* , ΔE00 , and ΔWID were interpreted by color visual thresholds.RESULTS:
The techniques presented a significant increase in L* and WID and, a significant decrease in a* and b* until the completion of treatments. Statistical differences between the techniques for a*, b* and WID were observed from T1 until T3. All techniques demonstrated excellent effectiveness for ΔEab* , ΔE00 , and ΔWID between baseline and each evaluation and follow-up timepoints. However, at T6, it was possible to identify a rebound effect for all techniques.CONCLUSIONS:
All bleaching techniques presented excellent effectiveness. The stability of the whitening produced was maintained for 6 months. CLINICALSIGNIFICANCE:
Effective whitening of blood-stained teeth was achieved using walking bleach (sodium perborate), inside/outside (hydrogen peroxide - 7.5%) and in-office techniques (hydrogen peroxide - 35%). The bleaching techniques were effective after the completion of the treatments. A slight rebound was observed at 1 year follow-up.Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Diente
/
Blanqueamiento de Dientes
/
Decoloración de Dientes
/
Blanqueadores Dentales
Límite:
Humans
Idioma:
En
Revista:
J Esthet Restor Dent
Asunto de la revista:
ODONTOLOGIA
Año:
2022
Tipo del documento:
Article
País de afiliación:
Brasil