Accuracy of Single-Step versus 2-Step Double-Mix Impression Technique
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Accuracy of Single-Step versus 2-Step Double-Mix Impression Technique. / Franco, Eduardo Batista; da Cunha, Leonardo Fernandes; Herrera, Francyle Simões; Benetti, Ana Raquel.
I: ISRN dentistry, Bind 2011, 2011, s. 341546.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Accuracy of Single-Step versus 2-Step Double-Mix Impression Technique
AU - Franco, Eduardo Batista
AU - da Cunha, Leonardo Fernandes
AU - Herrera, Francyle Simões
AU - Benetti, Ana Raquel
PY - 2011
Y1 - 2011
N2 - Objective. To investigate the accuracy of dies obtained from single-step and 2-step double-mix impressions. Material and Methods. Impressions (n = 10) of a stainless steel die simulating a complete crown preparation were performed using a polyether (Impregum Soft Heavy and Light body) and a vinyl polysiloxane (Perfectim Blue Velvet and Flexi-Velvet) in two consistencies, in one or two (without relief) steps. Accuracy of the stone dies was accessed at a measuring microscope, using a metallic crown with perfect fit to the reference crown preparation. Data were submitted to 2-way ANOVA and Tukey test (a = 0.05). Results. The single-step technique resulted in slightly larger dies, while the 2-step technique without relief produced significantly smaller dies, when compared to the original stainless steel die. Stone dies obtained from 2-step polyether impressions were significantly smaller when compared to dies obtained from 2-step vinyl polysiloxane impressions (Impregum 2-step: -290.94 ± 71.64¿µm; Perfectim 2-step: -201.86 ± 28.58¿µm). No significant differences were observed in dies obtained from either polyether or vinyl polysiloxane with the single-step technique (Impregum single-step: 63.52 ± 16.60¿µm; Perfectim single-step: 79.40 ± 14.11¿µm). Conclusion. Higher discrepancies were detected for the 2-step impression technique without relief for the investigated materials.
AB - Objective. To investigate the accuracy of dies obtained from single-step and 2-step double-mix impressions. Material and Methods. Impressions (n = 10) of a stainless steel die simulating a complete crown preparation were performed using a polyether (Impregum Soft Heavy and Light body) and a vinyl polysiloxane (Perfectim Blue Velvet and Flexi-Velvet) in two consistencies, in one or two (without relief) steps. Accuracy of the stone dies was accessed at a measuring microscope, using a metallic crown with perfect fit to the reference crown preparation. Data were submitted to 2-way ANOVA and Tukey test (a = 0.05). Results. The single-step technique resulted in slightly larger dies, while the 2-step technique without relief produced significantly smaller dies, when compared to the original stainless steel die. Stone dies obtained from 2-step polyether impressions were significantly smaller when compared to dies obtained from 2-step vinyl polysiloxane impressions (Impregum 2-step: -290.94 ± 71.64¿µm; Perfectim 2-step: -201.86 ± 28.58¿µm). No significant differences were observed in dies obtained from either polyether or vinyl polysiloxane with the single-step technique (Impregum single-step: 63.52 ± 16.60¿µm; Perfectim single-step: 79.40 ± 14.11¿µm). Conclusion. Higher discrepancies were detected for the 2-step impression technique without relief for the investigated materials.
U2 - 10.5402/2011/341546
DO - 10.5402/2011/341546
M3 - Journal article
C2 - 21991468
VL - 2011
SP - 341546
JO - ISRN dentistry
JF - ISRN dentistry
SN - 2090-438X
ER -
ID: 40396137