In vitro comparison of one-step, two-step, and three-step polishing systems on the surface roughness and gloss of different resin composites.

OBJECTIVES: This laboratory study evaluated the effect of three polishing systems on the surface roughness and gloss of resin composites. MATERIALS AND METHODS: Thirty specimens (6 mm Ø × 8 mm) were fabricated from each of three resin composites: Z 350 XT (nanofill), Harmonize (nanohybrid), and Estelite Omega (supranonofill). All specimens were photopolymerized using a multi-peak LED curing unit (VALO-Standard mode), having a exitance irradiance of approximately 1000 mW/cm2 against a polyester strip (PS). 2 mm was then removed from the irradiated end (finished) using #320 abrasive paper (F). Specimens were then randomly polished (P) using a one-step (1S) (OneGloss), two-step (2S) (EVE Diacomp Twist Basic CA), or 3-step (3S) (Astropol P) system (n = 10). For PS, F, and P groups, surface roughness (Ra) was measured using a surface roughness tester, and surface gloss was measured with a glossmeter. For each specimen, the percent recovery to the PS value (%R) of surface roughness and surface gloss were calculated. Data were analyzed using two-way ANOVA, followed by Tukey's test. Surface roughness and gloss values were submitted to Pearson's correlation test (α = 0.05). All statistical testing was performed using a pre-set alpha of 0.05. RESULTS: The interaction term [resin composite × polishing system] was significant for both surface roughness (p = 0.001) and gloss (p = 0.0001). For all resin composites, the 2S and 3S systems provided a higher %R of surface roughness and gloss compared to those of the 1S system. There was a negative correlation between surface roughness and gloss, but only a few combinations showed strong correlations. CONCLUSIONS: The 2S and 3S polishing systems provided surfaces having greater smoothness and gloss compared to the 1S system. The ability to recover surface roughness and gloss was dependent on type of resin composite filler classification. CLINICAL SIGNIFICANCE: The 3S and 2S polishing systems were more effective in achieving PS values than was the 1S system for all tested resin composites. However, individual polishing systems performed differently depending on type of resin composite.

Alternativa de tratamento reabilitador para pacientes em uso de bisfosfonato intravenoso: relato de caso clínico / An alternative rehabilitation treatment for patients using intravenous bisphosphonate: clinical case report

O objetivo deste relato de caso clínico foi descrever a importância de planejar de maneira minuciosa uma alternativa de reabilitação conservadora de um paciente em uso de bisfosfonato intravenoso, bem como detalhar os procedimentos realizados. Paciente do gênero masculino, 78 anos, buscou atendimento odontológico relatando insatisfação com sua condição dentária atual, e o desejo de realizar novas próteses dentárias. Ao exame clínico, observou-se instabilidade da prótese parcial removível superior devido à fratura coronária do elemento 26. Ao exame radiográfico, observaram-se extensas lesões cariosas nos dentes 16 e 26. Após plano de tratamento realizado em equipe multidisciplinar, foi sugerida uma reabilitação sem nenhum procedimento cirúrgico, a fim de minimizar as complicações pós-operatórias e proporcionar saúde oral de maneira mais breve e minimamente invasiva. O tratamento incluiu a confecção de uma prótese parcial fixa dos elementos 13 ao 23 com encaixes de precisão associada à uma prótese parcial removível superior. Já para a arcada inferior, foi realizada uma prótese parcial fixa dos elementos 33 ao 41 e uma prótese parcial removível. Por meio deste caso clinico, foi possível concluir que uma abordagem conservadora possibilitou uma reabilitação que supriu as necessidades estéticas e funcionais do paciente que faz uso de medicamento antirreabsortivo(AU)

The aim of this study was to describe the importance of a carefully planning to conservative rehabilitation alternative for a patient using intravenous bisphosphonate, as well as to detail the procedures performed. A male patient, 78 years old, sought dental care reporting dissatisfaction with his current dental condition and the desire to perform new dental prostheses. At the clinical examination, instability of the superior removable partial denture was observed due to the coronary fracture of element 26. Radiographic examination revealed extensive carious lesions on teeth 16 and 26. After a multidisciplinary treatment planning, was suggested a rehabilitation without any surgical procedure, in order to minimize postoperative complications and provide oral health in a minor and minimally invasive manner. Treatment included a fixed partial denture of elements 13 to 23 with precision fittings attachments associated with a removable partial denture. To the jaw, a fixed partial prosthesis of elements 33 to 41 and a partial removable prosthesis were performed. Through this clinical case, it was possible to conclude that a conservative management provides an aesthetical and functional patient rehabilitation who take antiresorptive medication(AU)