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    Dimensional Stability of Additively Manufactured Diagnostic Maxillary Casts Fabricated with Different Model Resins
    (QUINTESSENCE PUBLISHING CO INC, 22.08.2024) Donmez, Mustafa Borga; Wepfer, Alena Bruna; Guven, Mehmet Esad; Cakmak, Gulce; Schimmel, Martin; Yilmaz, Burak
    Purpose: To evaluate the effect of model resin type and time interval on the dimensional stability of additively manufactured diagnostic casts. Materials and Methods: Ten irreversible hydrocolloid impressions and 10 impressions from an intraoral scanner were made from a reference maxillary stone cast, which was also digitized with a laboratory scanner. Conventional impressions were poured in type III stone (SC), while digital impressions were used to additively manufacture casts with a nanographene-reinforced model resin (GP) or a model resin (DM). All casts were digitized with the same laboratory scanner 1 day (T0), 1 week (T1), 2 weeks ( T2), 3 weeks ( T3), and 4 weeks ( T4) after fabrication. Cast scans were superimposed over the reference cast scan to evaluate dimensional stability. Data were analyzed with Bonferroni-corrected repeated measures ANOVA (alpha =.05). Results: The interaction between the main factors (material type and time interval) affected anterior teeth deviations, while the individual main factors affected anterior teeth and entire- cast deviations (P =.008). Within anterior teeth, DM had the lowest deviations at T3, and GP mostly had lower values at T2 and lower deviations at T3 than at T0 (P =.041). SC had the highest pooled anterior teeth deviations, and GP had the highest pooled entire cast deviations (P <.001). T3 had lower pooled anterior teeth deviations than at T0, T1, and T4, and higher pooled entire cast deviations than T1 were demonstrated (P =.027). Conclusions: The trueness of nanographene-reinforced casts was either similar to or higher than that of other casts. Dimensional changes were acceptable during the course of 1 month.
  • Küçük Resim Yok
    Öğe
    Dimensional Stability of Additively Manufactured Diagnostic Maxillary Casts Fabricated with Different Model Resins
    (Quintessence Publishing Co. Inc., 2024) Dönmez, Mustafa Borga; Wepfer, Alena Bruna; Güven, Mehmet Esad; Çakmak, Gülce; Schimmel, Martin; Yılmaz, Burak
    Purpose: To evaluate the effect of model resin type and time interval on the dimensional stability of additively manufactured diagnostic casts. Materials and Methods: Ten irreversible hydrocolloid impressions and 10 impressions from an intraoral scanner were made from a reference maxillary stone cast, which was also digitized with a laboratory scanner. Conventional impressions were poured in type III stone (SC), while digital impressions were used to additively manufacture casts with a nanographene-reinforced model resin (GP) or a model resin (DM). All casts were digitized with the same laboratory scanner 1 day (T0), 1 week (T1), 2 weeks (T2), 3 weeks (T3), and 4 weeks (T4) after fabrication. Cast scans were superimposed over the reference cast scan to evaluate dimensional stability. Data were analyzed with Bonferroni-corrected repeated measures ANOVA (α =.05). Results: The interaction between the main factors (material type and time interval) affected anterior teeth deviations, while the individual main factors affected anterior teeth and entire-cast deviations (P ≤.008). Within anterior teeth, DM had the lowest deviations at T3, and GP mostly had lower values at T2 and lower deviations at T3 than at T0 (P ≤.041). SC had the highest pooled anterior teeth deviations, and GP had the highest pooled entire cast deviations (P <.001). T3 had lower pooled anterior teeth deviations than at T0, T1, and T4, and higher pooled entire cast deviations than T1 were demonstrated (P ≤.027). Conclusions: The trueness of nanographene-reinforced casts was either similar to or higher than that of other casts. Dimensional changes were acceptable during the course of 1 month. © 2024 by Quintessence Publishing Co Inc.