Premium
Comparative Study of Dimensional Stability and Detail Reproduction of Reformulated and Nonreformulated Elastomeric Impression Materials
Author(s) -
Aivatzidou Konstantina,
Kamalakidis Savvas N.,
Emmanouil Ioannis,
Michalakis Konstantinos,
Pissiotis Argirios L.
Publication year - 2021
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.13248
Subject(s) - impression , silicone , elastomer , materials science , composite material , silicone elastomers , computer science , world wide web
Purpose To evaluate the dimensional stability and the detail reproduction of five current elastomeric impression materials in vitro. Materials and Methods The materials examined were: 3 different polyether impression materials, a vinyl polysiloxane impression material, and a vinyl polyether silicone impression material. All impression materials were of a medium viscosity. One stainless steel die was fabricated according to the ANSI/ADA specification no.19 criteria. Twenty impressions of this die were made for each material. Dimensional accuracy and surface detail were evaluated 24 hours after making the impressions using a measuring microscope. The data were analyzed using Welch's analysis of variance, Games‐Howell Post‐Hoc, and the Pearson's chi‐square tests (α = 0.05). Results Statistical differences were observed in the mean percent dimensional stability (F [4,47] = 39, p < 0.001) of the tested impression materials. The highest dimensional change was recorded for the vinyl polysiloxane impression material, with a mean percent value of –0.09 ± 0.02% ( p < 0.001). The lowest dimensional change was recorded for the Monophase polyether material with a mean percent value of –0.03 ± 0.01% ( p < 0.038). The best surface detail reproduction results were obtained using the Monophase polyether material (90% acceptable impressions), with no significant differences (χ² [4] = 3.86, p = 0.483) observed between the Monophase and the rest impression materials. Conclusions All materials exhibited acceptable dimensional stability, well below the ANSI/ADA specification no.19 standard of ≤0.5% dimensional change. All impression materials demonstrated acceptable surface detail reproduction with no significant differences between them.