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Effects of flowable liners on the shrinkage vectors of bulk-fill composites.
Kaisarly, Dalia; Meierhofer, D; El Gezawi, M; Rösch, P; Kunzelmann, K H.
Afiliación
  • Kaisarly D; Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestrasse 70, 80336, Munich, Germany. kaisarly@dent.med.uni-muenchen.de.
  • Meierhofer D; Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt. kaisarly@dent.med.uni-muenchen.de.
  • El Gezawi M; Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University, Goethestrasse 70, 80336, Munich, Germany.
  • Rösch P; Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.
  • Kunzelmann KH; University of Applied Sciences, Augsburg, Germany.
Clin Oral Investig ; 25(8): 4927-4940, 2021 Aug.
Article en En | MEDLINE | ID: mdl-33506426
OBJECTIVES: This investigation evaluated the effect of flowable liners beneath a composite restoration applied via different methods on the pattern of shrinkage vectors. METHODS: Forty molars were divided into five groups (n = 8), and cylindrical cavities were prepared and bonded with a self-etch adhesive (AdheSe). Tetric EvoCeram Bulk Fill (TBF) was used as the filling material in all cavities. The flowable liners Tetric EvoFlow Bulk Fill (TEF) and SDR were used to line the cavity floor. In gp1-TBF, the flowable composite was not used. TEF was applied in a thin layer in gp2-fl/TEF + TBF and gp3-fl/TEF + TBFincremental. Two flowable composites with a layer thickness of 2 mm were compared in gp4-fl/TEF + TBF and gp5-fl/SDR + TBF. TEF and SDR were mixed with radiolucent glass beads, while air bubbles inherently present in TBF served as markers. Each material application was scanned twice by micro-computed tomography before and after light curing. Scans were subjected to image segmentation for calculation of the shrinkage vectors. RESULTS: The absence of a flowable liner resulted in the greatest shrinkage vectors. A thin flowable liner (gp2-fl/TEF + TBFbulk) resulted in larger overall shrinkage vectors for the whole restoration than a thick flowable liner (gp4-fl/TEF + TBF). A thin flowable liner and incremental application (gp3-fl/TEF + TBFincremental) yielded the smallest shrinkage vectors. SDR yielded slightly smaller shrinkage vectors for the whole restoration than that observed in gp4-fl/TEF + TBF. CONCLUSIONS: Thick flowable liner layers had a more pronounced stress-relieving effect than thin layers regardless of the flowable liner type. CLINICAL RELEVANCE: It is recommended to apply a flowable liner (thin or thick) beneath bulk-fill composites, preferably incrementally.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resinas Compuestas / Caries Dental Límite: Humans Idioma: En Revista: Clin Oral Investig Asunto de la revista: ODONTOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Resinas Compuestas / Caries Dental Límite: Humans Idioma: En Revista: Clin Oral Investig Asunto de la revista: ODONTOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Alemania