Abstract
Objective: Evaluate the influence of different disinfection methods on the dimensional stability of temporary acrylic resin crowns. Material and Methods: A metallic die with two different marks at the margin was used to prepare the specimens with two different resins (bis-acrylic resin-Structur, acrylic resin-Dencrilay). They were divided into eight groups (n=8), determined according to the disinfection methods (microwave, acetic acid, 1% hypochlorite) and control. The marginal adaptation was recorded using an optical microscope (50X) comparing two different marks on the margin of the crowns with 2 points along the entire circumferential margin before and after disinfection methods. Results: Results were compared statistically by ANOVA and Tukey's test (p?0.05). The two-way ANOVA showed statistical difference between types of materials. No significant differences were found between disinfection methods and interaction of factors. Conclusion: All procedures affected the marginal adaptation however temporary crowns made by bis-acrylic resin demonstrate higher dimensional stability.KeywordsDimensional stability; Disinfection; Temporary crowns.
Highlights
INTRODUCTIONN owadays a large number of patients that needs dental treatment are motivated by the functional and aesthetic requirements in this context curative treatments often are indicated for fixed prostheses, by extensive destruction or loss of one or more dental elements [1,2,3]
N owadays a large number of patients that needs dental treatment are motivated by the functional and aesthetic requirements in this context curative treatments often are indicated for fixed prostheses, by extensive destruction or loss of one or more dental elements [1,2,3].Oral rehabilitation with fixed partial denture does not allow in most cases complete treatment in a single session because it is usually involve lab procedures, the need for an interim temporary prosthesis [2,3]
Considering that temporary crowns are the prototypes of final restorations, when a temporary crown is cemented on the tooth for a certain period of tempo we have to take into account the marginal adaptation of these [3,4,5]
Summary
N owadays a large number of patients that needs dental treatment are motivated by the functional and aesthetic requirements in this context curative treatments often are indicated for fixed prostheses, by extensive destruction or loss of one or more dental elements [1,2,3]. The use of microwave energy as a method of disinfection has favorable characteristics such as low cost, lack of toxicity, easy to use besides quick and efficient action against microorganisms [7,10] The evaluation of these materials and method of disinfection is important considering its properties on the reduction of microorganisms during dental treatment. Based on these questions, this study aimed to evaluate the influence of different disinfection methods on marginal stability of temporary crowns of acrylic resin and bis-acrylic
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