Micro-computed Tomography Evaluation of Film Thickness of Veneers Cemented with Heated Resin Composites and a Resin Cement
Objectives: The purpose of this in vitro study was to evaluate the film thickness (FT) of various cementation techniques through 3-dimensional (3D) microcomputed tomography (mCT). Methods: Thirty 3D printed tooth maxillary central incisors specimens with standard preparations for veneres and used as testing models with 3D printed veneers.They were divided into 5 groups (n=6): Clearfill AP-X (APX); ENA Hri (ENA); Estelite Omega (EOM); Essentia (ESS); Calibra Esthetic (CES). The cementation was performed using pre-heated composite to 55 degrees C with a commercial compule heater (Ena Heat) and resin cement at room temperature, using standard procedures by one person. Specimens were scanned after polymerization using a mCT apparatus (mCT 40; Scanco Medical AG), and the resulting files were imported and analyzed with 3D rendering software to calculate the FT. Collected data from FT were submitted to 1-way ANOVA (a=.05). Results: In general, the film thickness of the light-curing resin cement (CES) was the lowest between the groups, though were not statistical difference with the pre-heated EOM and ESS resins (P>.05). A significant statistical difference was found in ENA and APX resins that showed high thicknesses (P<.05). Values ranged from 0.29mm to 0.59mm. Conclusions: Some pre-heated resin composites (APX and ENA) promote thicker resin cements than light-curing resin cements when cementing veneers. ESS and EOM presented cementation thicknesses similar to resin cement.
2020 Chilean Division Meeting (Virtual) 2020
Dental Materials 2: Polymer-based Materials
Pizarro, Paulina
( Universidad de los Andes, Chile
, La Serena
, Coquimbo
, Chile
)
Atria, Pablo
( Universidad de los Andes
, Santiago
, Chile
)
Hirata, Ronaldo
( New York University
, New York
, New York
, United States
)
Sampaio, Camila
( Universidad de los Andes, Chile
, La Serena
, Coquimbo
, Chile
)
NONE
Oral Session
Oral Session 2
Table 1. Descriptive statistics of the Film thickness (FT) data in mm for all experimental groups. Data represent the mean (SD) of different heated resin composites and a resin cement. Different letters represent means that differ from each other (P<.05).