Efetividade de dentifrícios clareadores sobre esmalte de dentes bovinos / Effectiveness of whitening dentifrices on bovine teeth enamel

Introdução: devido à insatisfação relatada pelos pacientes com a coloração dos dentes e a busca por procedimentos que envolvam estética do sorriso associado com o desenvolvimento de técnicas e materiais amplamente propagados na mídia, as empresas responderam com a oferta no mercado de uma variedade de opções de dentifrícios que propõem efeito clareador prático e rápido. Objetivo: avaliar a efetividade de dentífricos clareadores em diferentes formas de apresentação sobre esmalte de dentes bovinos. Material e Métodos: quinze dentes bovinos foram imersos diariamente por um período de 1 hora em refrigerante a base de cola e em seguida foram divididos equitativamente em três grupos, onde cada grupo foi escovado com um dentifrício especifico por 2 minutos. O grupo A foi escovado com dentifrício Colgate Luminous White (Colgate ­ Palmolive), em forma de pasta, o grupo B com dentifrício Closeup Diamond Attraction Delicate White (Unilever) em forma de gel e o grupo C com dentifrício Oral-B Complete (Procter & Gamble) em forma de pasta. Resultados: as diferentes formas de apresentação estudadas foram efetivas na remoção das manchas extrínsecas em dentes bovinos; O dentifrício Colgate Luminous White na forma de apresentação pasta clareador apresentou-se mais efetivo na remoção das manchas extrínsecas; O dentifrício Oral ­ B Complete na forma de pasta foi efetivo, porém em menor intensidade em comparação aos dentifrícios clareadores estudados. Conclusão: as diferentes formas de apresentação dos dentifrícios utilizados foram efetivas na remoção de manchas extrínsecas.

Introduction: due to dissatisfaction reported by patients with tooth staining and the search for procedures involving smile aesthetics associated with the development of techniques and materials widespread on social medias, companies responded by offering to the market a variety of toothpaste choices in order to provide practical and fast bleaching effects. However, these dentifrices appear to have a limited efficiency since they only contain abrasives for the removing of extrinsic tooth stain. Objective: his research aimed to assess the effectiveness of different forms of presentation of bleaching agents on bovine teeth enamel. Methods: daily, fifteen bovine teeth were immersed in cola soft drink for a period of 1 hour and then they were divided into three groups (each group containing five bovine teeth). Each group was brushed with a specific dentifrice for 2 minutes: the group A was brushed with Colgate Luminous White in paste form (Colgate ­ Palmolive); the Group B with Diamond Closeup Attraction Delicate White in gel form (Unilever), and the group C with Oral-B complete in paste form (Procter & Gamble). Results: color change was observed through photographs and analysis of the interpreted samples based on the theoretical background. Conclusion: the dentifrices used were able to remove extrinsic stains and the bleaching dentifrice Colgate Luminous White was more effective as a result in this connection.

Clinical study of shade improvement and safety of polymer-based pen type BlancTic Forte whitening agent containing 8.3% Carbamide peroxide / 대한치과보존학회지

This clinical study evaluated the whitening effect and safety of polymer based-pen type BlancTis Forte (NIBEC) containing 8.3% carbamide peroxide. Twenty volunteers used the BlancTis Forte whitening agent for 2 hours twice a day for 4 weeks. As a control, Whitening Effect Pen (LG) containing 3% hydrogen peroxide was used by 20 volunteers using the same protocol. The change in shade (DeltaE*, color difference) was measured using Shadepilot(TM) (DeguDent) before, during, and after bleaching (2 weeks, 4 weeks, and post-bleaching 4 weeks). A clinical examination for any side effects (tooth hypersensitivity or soft tissue complications) was also performed at each check-up. The following results were obtained. 1. Both the experimental and control groups displayed a noticeable change in shade (DeltaE) of over 2. No significant differences were found between the two groups (p > 0.05), implying that the two agents have a similar whitening effect. 2. The whitening effect was mainly due to changes in a and b values rather than in L value (brightness). The experimental group showed a significantly higher change in b value, thus yellow shade, than the control (p < 0.05). 3. None of the participants complained of tooth hypersensitivity or soft tissue complications, confirming the safety of both whitening agents.

Progress on New Type of Skin Whitening Agents / 环境与健康杂志

This paper reviewed some new types of skin whitening agents and their mechanisms of action from aspects of suppressing melanogenesis, reducing melanosome transference and enhancing desquamation of melanin pigment from the epidermis etc.