RESUMO
This evaluated the arrangement of filler particles in depth of nanocomposites, and surface roughness, wettability, microtopography, and micromorphology following additional polishing step. Forty samples of each composite tested [Filtek Z350XT (FZ), IPS Empress Direct (IP)] were fabricated and finished/polished/additionally polished using one of the following methods (n = 10/group): no finishing/polishing (NFP), Sof-Lex Pop-On + no additional polishing (SP), Sof-Lex Pop-On + Astropol rubber polisher (SP+A), and Sof-Lex Pop-On + felt disc with polishing paste (SP+FP). Surface roughness (Ra) and contact angles were measured using a profilometer and goniometer, respectively. Microtopography and micromorphology were evaluated using atomic force microscopy and scanning electron microscopy, respectively. Ra and contact angle data were examined by two-way analysis of variance and Tukey's test (p < .05). Organic matrix, lower and larger filler particles were disposed in depth. Mean Ra values were lowest and contact angles were smallest in the NFP group for both composite resins. SP+A and SP+FP decreased mean Ra in comparison with SP for FZ, whereas only SP+FP decreased mean Ra in comparison with SP for IP. Only SP+FP increased contact angles in comparison with SP for FZ, whereas contact angles in the SP+A, SP+FP, and SP groups were similar for FZ. Both composites presented more uniform topography and smother surfaces following SP+A and SP+FP in comparison with SP. Therefore, additional polishing improved surface smoothness and decreased wettability of the composite resins studied. SP+FP produced smoother and less wettable surfaces for FZ and IP.
RESUMO
Introdução A estética do sorriso tem motivado pacientes a buscarem o tratamento odontológico. Assim, apresença de manchas brancas pode causar desconforto para o paciente, necessitando de intervenção por parte do cirurgião dentista. Objetivo: Descrever a técnica de microabrasão aplicada para o tratamento estético de múltiplas lesões brancas inativas de cárie dentária, visualizadas após remoção de aparelho ortodôntico. Métodos: A microabrasão dentária foi realizada através da manipulação e aplicação de uma pasta à base de pedra pomes e ácido fosfórico a 37%. A pasta foi aplicada, sob isolamento absoluto, com taça de borracha, perfazendo um total de 6 aplicações, com duração de 15 s cada. Ao final de cada aplicação foi realizada lavagem com jato de água.Resultados: A utilização da técnica de microabrasão demonstrou resultado estético satisfatório para o tratamentode múltiplas lesões brancas inativas de cárie superficiais no esmalte dentário. Conclusões: A preservação daestrutura dentária, bem como a devolução da estética, obtidas através da microabrasão sugerem queprocedimentos minimamente invasivos devem ser sempre utilizados como a primeira opção de tratamento paralesão branca inativa de cárie que cause desconforto estético para o paciente
Introduction: The aesthetics of the smile has motivated patients to seek dental treatment. Thus, the presence ofwhite spot lesions may cause discomfort for the patient, requiring intervention by the dentist. Objective: To describe the microabrasion technique applied for the aesthetic treatment of multiple inactive white spot lesions after removal of orthodontic appliance. Methods: The dental microabrasion was accomplished through the manipulation and application of a paste based on pumice and 37% phosphoric acid. The paste was applied, under rubber dam,with rubber cup, making a total of six applications, lasting 15 seconds each. At the end of each application washingwith water jet was done. Results: The use of microabrasion technique showed satisfactory aesthetic result for thetreatment of multiple inactive white spot lesions on the enamel surface. Conclusions: The preservation of toothstructure as well as the return of aesthetics obtained by microabrasion reinforce that minimally invasive procedures should always be used as the first treatment option for inactive white spot lesions that cause aesthetic discomfort for the patient