Navegando por Autor "Torres, Érica Miranda de"
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Artigo Effect of acetyl resin retentive arms on the retentive force ofcircumferential clasps: an in vitro study(2012) Torres, Érica Miranda de; Damasceno, Iane Inarde e Siqueira; Amaral, Bruna Aguiar do; Rodrigues, Renata Cristina Silveira; Carreiro, Adriana da Fonte Porto; Ribeiro, Ricardo FariaPURPOSE: To compare and to evaluate the stability of the retentive force of cobalt-chromium (Co-Cr) circumferential clasps (control) to those with an acetyl resin retentive arm. METHODS: Sixteen specimens with a couple of circumferential clasps were made using Co-Cr over a metal model providing 0.25 mm undercuts. Eight specimens were fabricated without the anterior retentive arm, which was made later using acetyl resin (Dental D). Insertion and removal simulation test was performed through 7250 cycles. The retentive force was recorded in Newtons (N) for periods corresponding to 0, 1, 2, 3, 4, and 5 years. The data were subjected to ANOVA and Tukey test to compare periods and to Student's t test to compare groups (α=0.05). RESULTS: Mean (SD) is presented for Co-Cr and resin groups, respectively: 8.09(3.05) and 2.79(1.57) in period 0; 10.48(4.25) and 3.32(1.92) in 1 year; 10.09(4.15) and 3.47(1.81) in 2 years; 9.87(4.30) and 3.46(1.87) in 3 years; 9.46(3.93) and 3.27(1.59) in 4 years; 9.63(3.79) and 3.41(1.59) in 5 years. There were significant differences for Co-Cr between periods of 0 and 1 (p<0.001), 0 and 2 (p<0.01) and 0 and 3 (p<0.05). In the resin group, no significant differences were found between periods (p>0.05). Comparisons between the groups showed statistical differences for all tested periods: 0 (p=0.0012), 1 (p=0.0013), 2 (p=0.0019), 3 (p=0.0031), 4 (p=0.0027) and 5 years (p=0.0014). CONCLUSIONS: Acetyl resin retentive arms, even if only in the anterior clasps, can significantly reduce the retentive force, but this force remained stable after 5 years of simulated use.Artigo The use of a magnetic attachment in a removable partial denture of a patient with periodontal tissue loss(2009) Carreiro, Adriana da Fonte Porto; Guerra, Cátia Maria Fonseca; Moraes, Sandra Lúcia Dantas de; Farias Neto, Arcelino; Torres, Érica Miranda de; Almeida, Erika Oliveira deThe use of magnets in removable partial dentures is a valid alternative for eliminating prosthetic structures that may interfere in esthetics without losing retention and stability. Magnets can also be recommended for patients with periodontal tissue loss, since they can decrease transmission of forces to remaining teeth. The aim of this clinical report was to present an alternative prosthetic rehabilitation treatment for periodontally-compromised abutment teeth, and to point out the advantages and disadvantages of using magnets in removable partial dentures (overdentures) from the functional, biological, and esthetic point of view.Artigo Utilização do titâneo na confecção de estruturas metálicas em prótese parcial removível(2007) Torres, Érica Miranda de; Carreiro, Adriana da Fonte Porto; Lira, Cristianne Maria Nunes de; Ribeiro, Ricardo FariaEm virtude de propriedades como excelente biocompatibilidade, alta resistência à corrosão e baixo peso específico, o titânio tem se tornado um material de grande interesse para a odontologia, sendo largamente utilizado nos implantes e nas cirurgias ortognáticas. Recentemente, o titânio vem sendo considerado uma alternativa viável para a confecção de estruturas metálicas em próteses parciais removíveis, tanto na sua forma pura (99,75% puro), como sob a forma de ligas (Ti-6Al-4V; Ti-6A1-7Nb). Baseado numa revisão de literatura, o presente trabalho estudou o uso do titânio na confecção de estruturas metálicas em próteses parciais removíveis, destacando as vantagens, desvantagens e características desse metal. Pode-se concluir que o uso do titânio é uma opção conveniente para reabilitação de arcos parcialmente desdentados com resultados clínicos bastante satisfatórios e promissores. Contudo, a necessidade de laboratórios altamente equipados eleva o custo, impedindo sua utilização em larga escala.