In the study the influence of different dental technical tools on the surface temperature
and phase composition of fixed dental prostheses (FDPs) made of yttria-partially stabilized zirconia
polycrystals (3Y-/4Y-/5Y-PSZ) was investigated. FDPs were fabricated by using computer-aided
manufacturing (CAM). The FDPs were treated with a contra-angle handpiece equipped with different
burs and polishers. The resulting surface temperatures were measured with a thermographic camera,
and the resulting phase transformations were investigated by X-ray diffraction and quantified by
Rietveld refinement. Processing with burs resulted in no phase transformation, but a preferred
orientation shift. Using coarse polisher induced a phase transformation to the rhombohedral phase,
while fine polishers produced no relevant phase transformations and no preferred orientation shift.
Compared to the monoclinic phase (ca. 9% theoretical volume increase), which is associated with
low-temperature degradation (LTD), the rhombohedral phase is much more voluminous (ca. 15%
theoretical volume increase) and distorted and, therefore, has a greater degradation potential.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:87527 |
| Date | 20 October 2023 |
| Creators | Wertz, Markus, Schmidt, Michael Benno, Hölzig, Hieronymus, Wagner, Maximilian, Abel, Bernd, Kloess, Gert, Hahnel, Sebastian, König, Andreas |
| Publisher | MDPI |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 4471 |
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