Reducing the effect of polymerization shrinkage of temporary fixed dental prostheses by using different materials and fabrication techniques.
Saved in:
| Title: | Reducing the effect of polymerization shrinkage of temporary fixed dental prostheses by using different materials and fabrication techniques. |
|---|---|
| Authors: | Libecki, Wojtek1 wlibecki@proth.uni-kiel.de, Elsayed, Adham1, Freitag-Wolf, Sandra2, Kern, Matthias1 |
| Source: | Dental Materials. Dec2016, Vol. 32 Issue 12, p1464-1471. 8p. |
| Subjects: | Dental materials, Dentures, Curing, Polymerization, Fabrication (Manufacturing), Silicones |
| Abstract: | Objective The aim of this laboratory study was to evaluate the horizontal and vertical effects of the polymerization shrinkage of three-unit temporary fixed dental prostheses (FDPs) on the position of the prepared teeth. In addition, the reduction of these effects by using different fabrication techniques was evaluated. Methods A total of 192 temporary FDPs were fabricated using one methacrylate (MA) and two dimethacrylate (DMA) materials. Each material group (n = 64) was divided into two groups according to the fabrication methods (M1: curing on the prepared teeth, M2: curing in a silicone mold). Each fabrication group was divided into four subgroups (n = 8) according to the relining method used (B: no relining, S: spacer foil 300 μm, DG: grinding-out with 500 μm cutting depth, and FG: free grinding). The experimental apparatus consisted of two abutment teeth lowered at right angles into a silicone mold. One prepared tooth was embedded in silicone to simulate the periodontium and permit slight horizontal tooth movement. The dimensional changes were recorded with an optical microscope. The test images were superimposed and measured using image analysis software. Results The statistical analysis showed that there were significantly higher horizontal changes for the MA than the DMA resins in M1, while there was none in M2. Regarding the vertical changes, there were significant differences between the baseline group and all relining and fabrication groups in all materials. Significance Relining of directly fabricated temporary FDPs significantly reduces the effect of polymerization shrinkage and thus secures the position of the prepared teeth. [ABSTRACT FROM AUTHOR] |
| Copyright of Dental Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
Be the first to leave a comment!
