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Marginal Accuracy of Monolithic and Veneered Zirconia Crowns Fabricated by Conventional and Digital Workflows.
Abduo, Jaafar; Ho, Grace; Centorame, Alannah; Chohan, Simran; Park, Clara; Abdouni, Ramiz; Le, Phillip; Ngo, Christopher.
Afiliación
  • Abduo J; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Ho G; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Centorame A; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Chohan S; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Park C; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Abdouni R; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Le P; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
  • Ngo C; Restorative Section, Melbourne Dental School, Melbourne University, Melbourne, Victoria, Australia.
J Prosthodont ; 32(8): 706-713, 2023 Oct.
Article en En | MEDLINE | ID: mdl-36321644
PURPOSE: To compare the marginal accuracy of zirconia crowns fabricated by different workflows (conventional and digital) and designs (monolithic and veneered). MATERIALS AND METHODS: A prepared maxillary first molar was used for the study. Four workflow combinations were evaluated: (1) intraoral scanning and monolithic zirconia (IOS-M), (2) intraoral scanning and veneered zirconia (IOS-V), (3) conventional impression and monolithic zirconia (IMP-M), and (4) conventional impression and veneered zirconia (IMP-V). All of the specimens had similar designs. The veneered groups had a buccal cutback for esthetic veneer application. A total of 10 crowns were produced in each workflow. The vertical and horizontal marginal accuracies were measured with a traveling microscope. Depending on the normality of the data, one-way analysis of variance test or Kruskal-Wallis test were applied to evaluate the differences among the groups (α = 0.05). RESULTS: The most superior vertical marginal accuracy was observed for IOS-V (mean = 22.5 µm; SD = 6.7 µm), followed by IMP-V (mean = 23.9 µm; SD = 7.8 µm), IOS-M (mean = 28.7 µm; SD = 10.3 µm), and IMP-M (mean = 39.8 µm; SD = 22.0 µm), respectively (p < 0.001). The IOS-M had the greatest mean horizontal discrepancies (mean = 23.9 µm; SD = 4.3 µm) followed by IMP-M (mean = 21.3 µm; SD = 5.7 µm), IMP-V (mean = 19.2 µm; SD = 5.3 µm) and IOS-V (mean = 17.6 µm; SD = 5.7 µm) (p < 0.001). CONCLUSIONS: Monolithic zirconia crowns fabricated digitally had superior marginal accuracy than monolithic zirconia crowns fabricated conventionally. Esthetic buccal veneering of predominantly monolithic zirconia copings improved the vertical and horizontal marginal accuracies.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Diseño de Prótesis Dental / Diseño Asistido por Computadora Idioma: En Revista: J Prosthodont Asunto de la revista: ODONTOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Australia

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Diseño de Prótesis Dental / Diseño Asistido por Computadora Idioma: En Revista: J Prosthodont Asunto de la revista: ODONTOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Australia