Effect of acetyl resin retentive arms on the retentive force ofcircumferential clasps: an in vitro study.

Torres, Érica Miranda de; Damasceno, Iane Inarde e Siqueira; Amaral, Bruna Aguiar do; Rodrigues, Renata Cristina Silveira; Carreiro, Adriana da Fonte Porto; Ribeiro, Ricardo Faria

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Campo DC	Valor	Idioma
dc.contributor.author	Torres, Érica Miranda de	-
dc.contributor.author	Damasceno, Iane Inarde e Siqueira	-
dc.contributor.author	Amaral, Bruna Aguiar do	-
dc.contributor.author	Rodrigues, Renata Cristina Silveira	-
dc.contributor.author	Carreiro, Adriana da Fonte Porto	-
dc.contributor.author	Ribeiro, Ricardo Faria	-
dc.date.accessioned	2016-07-11T13:52:56Z	-
dc.date.available	2016-07-11T13:52:56Z	-
dc.date.issued	2012	-
dc.identifier.citation	TORRES, Érica Miranda de et al. Effect of acetyl resin retentive arms on the retentive force of circumferential clasps: an in vitro study. Journal of Prosthodontic Research , v. 56, n. 3, p. 216-21, 2012.	pt_BR
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/20896	-
dc.language	por	pt_BR
dc.language.iso	eng	pt_BR
dc.rights	Acesso Aberto	pt_BR
dc.subject	Dental clasps	pt_BR
dc.subject	Acetyl resin	pt_BR
dc.subject	Removable partial denture	pt_BR
dc.subject	Aesthetics	pt_BR
dc.subject	Fatigue	pt_BR
dc.title	Effect of acetyl resin retentive arms on the retentive force ofcircumferential clasps: an in vitro study.	pt_BR
dc.type	article	pt_BR
dc.description.resumo	PURPOSE: 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.	pt_BR
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