Influence of the acid erosion associated with dental bleaching in bovine enamel: In vitro study

Objective: To evaluate the influence of acid erosion caused by the daily intake of lemon juice or apple cider vinegar, associated with immediate dental whitening, on bovine enamel. Materials and Methods: 30 bovine teeth were sectioned to obtain enamel blocks and were distributed into three groups (n = 10): G1- Tooth whitening with 35% hydrogen peroxide; G2- Tooth whitening with 35% hydrogen peroxide + lemon juice and G3 - Tooth whitening with 35% hydrogen peroxide + apple cider vinegar. Treatments were performed for 21 days, the varnish was removed and the analysis of loss of structure and surface roughness were performed by means of non-contact 3D Confocal Chromatic Profilometer. The roughness data obtained were analyzed by Kruskal-Wallis and Mann-Whitney non-parametric tests. Results: All groups exhibited greater roughness (Sa) on the side exposed to the treatments (G1 = 3.17b; G2 = 4.17b; G3 = 3.99b) compared to the unexposed side (G1 = 2.55a; G2 = 3.94a; G3 = 2.40a). There was a statistically significant difference among the groups evaluated, being G1 (3.17A) <G3 (3.99C) <G2 (4.17B). Conclusion: 35% hydrogen peroxide has the least erosive potential when compared to its association with vinegar and to lemon juice.

In vitro influence of amazonian substances on the dental bleaching

Due to the wide scientific divergence of results among in vitro investigations about the influence of food pigmentation on teeth staining during bleaching, this study aims to evaluate in the laboratory the effectiveness of at-home bleaching using carbamide peroxide (CP), and in-office bleaching using hydrogen peroxide (HP) applied to bovine teeth exposed to açaí and guarana energy drink during the dental whitening process. Extracted bovine incisors were randomly separated into six groups as follows: two control groups (at-home bleaching [HB] and in-office bleaching [OB] and immersed in artificial saliva), two groups following the immersion in açaí (HBa and OBa), and two groups following the immersion in guarana (HBg and OBg). The immersion cycle was conducted three times a day for five minutes. After the initial reading, the color was registered subsequently to the third (and last) week of whitening process. This procedure was carried out using Easyshade spectrophotometer and Vita shade guide. The data were submitted to a two-way ANOVA test (p<0.05). The results showed that after three weeks of bleaching, the whitening rate for the OBa group decreased significantly when compared to the other groups, also those submitted to at-home bleaching. After the third week of the whitening process, it was observed that the groups submitted to at-home bleaching presented higher whitening rates than the ones submitted to in-office bleaching. Therefore, the contact with açaí during whitening period may reduce the in-office bleaching efficacy.

Multidisciplinary Treatment after Orthodontics: Crown Lengthening and Dental Whitening in the Final Aesthetic Resolution of Smile

Após a conclusão do tratamento ortodôntico, os pacientes começam a se preocupar com outros fatores estéticos para garantir um sorriso harmonioso, sendo mais exigentes com a aparência. Além de dentes alinhados e harmoniosos, os pacientes estão em busca de um sorriso mais branco, se tornando cada vez mais exigentes com a aparência, cabendo ao dentista atender a essas necessidades. Um outro fator que pode tornar o sorriso antiestético é a presença de dentes curtos, que resulta em exposição excessiva da gengiva e um sorriso com aspecto mais infantil, e que muitas vezes é percebido apenas a finalização do tratamento ortodôntico. O objetivo do presente estudo foi revisar o tratamento estético do sorriso após ortodontia, associando cirurgia periodontal para aumento de coroa clínica e clareamento dental. O sorriso gengival pode ser corrigido integrando várias especialidades odontológicas devido às suas inúmeras causas, podendo ser indicada a realização de procedimentos cirúrgicos, ortodônticos ou restauradores. Quanto ao amarelamento dos dentes, uma das técnicas utilizadas é o clareamento dental, que consiste num procedimento pouco invasivo, indicado na maioria dos casos de manchas extrínsecas. O clareamento pode ser caseiro ou de consultório, mas em ambos os casos, o cirurgião-dentista precisa dominar a técnica. Nesse contexto, cabe ao ortodontista identificar e diagnosticar essas necessidades do paciente e encaminhá-lo para outros especialistas. Em conclusão, para alcançar os resultados esperados pelo paciente são imprescindíveis uma boa anamnese, um correto diagnóstico e o planejamento multidisciplinar do caso. Portanto a inter-relação das especialidades é imprescindível a fim de obter resultados satisfatórios e agradáveis ao paciente. Palavras-chave: Periodontia. Gengivectomia. Estética Dentária. Sorriso. Clareamento Dental. Abstract After the end of orthodontic treatment, patients become more rigorous with their appearance and worry about other aesthetic factors to ensure a harmonious smile. In addition to aligned and harmonious teeth, patients are looking for a whiter smile, becoming more and more rigorous with their appearance, leaving the dentist to meet these needs. Another factor that can impair smile aesthetics is the presence of short teeth, which results in an overexposure of the gum and a smile with a more childlike aspect, and that it is often perceived only at the end of orthodontic treatment. The aim of the present study was to review the aesthetic treatment of the smile after orthodontics, associating periodontal surgery to increase the clinical crown and tooth whitening. Aesthetics is the relationship between several factors. The gummy smile can be corrected by integrating several dental specialties, due to its numerous causes, and surgical, orthodontic or restorative procedures may be indicated. For tooth whitening, one of the techniques most indicated is dental bleaching, which consists of a minimally invasive procedure, indicated in most cases of extrinsic stains. The whitening can be made at home or in office, but in both cases, the dentist needs to master the technique. In this context, it is up to the orthodontist to identify and diagnose these needs of the patient and refer him to other specialists. In conclusion, a good anamnesis, a correct diagnosis and multidisciplinary case planning are essential to achieve the results expected by the patient. Therefore, the interrelationship between specialties is important in order to obtain satisfactory and pleasant results for the patient. Keywords: Periodontics, Gingivectomy, Esthetics, Smiling. Tooth Bleaching.

Reabilitação estética de incisivo central superior severamente escurecido

Dental unit darkening is the cause of aesthetic complaint by the patient, mainly because it is easily noticed by the human eye. Tooth whitening and ceramic veneers allow aesthetic rehabilitation in a pattern of visual equality to the natural dentition, by restoring teeth color and shape symmetry, bringing to the face a harmonious impact that is reflected in the entire set that composes it. By recovering teeth healthy appearance, this association of procedures restores people’s self-confidence. This study reports a clinical case of an esthetic management for darkened tooth 21, describing the sequence of techniques association of dental whitening and ceramic veneer to achieve aesthetics balance, showing the advantages and limitations of these procedures.