Open AccessLinear dimensional stability of irreversible hydrocolloids with and without disinfection at different storage times
Author(s) -
Lídia Olga Bach Pinheiro,
Alfonso Sanchez Ayala,
Marcos Cezar Pomini,
Vanessa Taborda da Cruz,
Ingrid Viel del Farias,
Adriana Postiglione Bührer Samra
Publication year - 2018
Publication title -
rsbo./rsbo
Language(s) - English
Resource type - Journals
eISSN - 1984-5685
pISSN - 1806-7727
DOI - 10.21726/rsbo.v15i2.617
Subject(s) - sodium hypochlorite , dentistry , significant difference , chemistry , mathematics , medicine , statistics , organic chemistry
Irreversible hydrocolloids have been used in dental practice for decades and their pouring time has been suggested to be as short as possible; however the latest generation of alginates exhibit better properties, which could influence the fidelity of the casts. Objective: To evaluate the linear dimensional stability of stone casts obtained using two irreversible hydrocolloid brands (Cavex ColorChange and Jeltrate) after disinfection. Material and methods: Samples were divided into 16 groups (n = 10) according to brand, storage time and disinfection. Impressions were taken of a metallic master model made of stainless steel with two abutments. Cast models were obtained using type IV gypsum, after disinfection with sodium hypochlorite at 1% or without any disinfection followed by storage for four different times (immediate pouring, and after 24, 72 or 120 hours storage after obtaining the impressions) and the models were measured with a digital caliper. Data were submitted to ANOVA 3-way followed by Tukey’s test (α 0.05). Conclusion: Storage longer than 24 hours affects the fidelity of casts. Disinfection does not promote significant alteration at any of the experimental times with either material.