Browsing by Author "Durán Urdiales, Daniela Belén"

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Efecto del termociclado sobre la resistencia flexural de resinas impresas 3D con relleno cerámico
(Universidad de Cuenca, 2025-05-05) Durán Urdiales, Daniela Belén; Gil Pozo, Jenny Alexandra
Objective: To determine the effect of thermocycling on the flexural strength of 5 types of ceramic-filled 3D printed resin and to estimate their reliability using the Weibull distribution. Materials and Methods: A total of 120 bar-shaped samples (2x2x12mm) were created from 5 different types of 3D printed composite resins: VSC; FL; SC and SOT, and a milled BC composite resin as a control group. Samples of each material were divided into two groups (n=10): T0 (0 cycles) and T1 (10,000 cycles), which simulated 1 year of clinical aging. Subsequently, the samples were subjected to a 3-point flexural strength test in a universal testing machine. Results: For both T0 and T1 samples, the control group presented the highest flexural strength values. At T0, the printed resin with the highest flexural strength was SC. In T1 samples, the printed resin with the highest flexural strength was SOT. The only resin that showed a statistically significant difference between samples T0 and T1 was SC. The 3D printed VSC resin showed higher Weibull modulus values at T1. Conclusions: The milled composite resin had higher flexural strength values compared to the 3D printed resins. Thermocycling had no effect on the flexural strength of the evaluated materials, except for the 3D printed SC resin. The reliability of the 3D printed VSC, SC, and FL resins was affected by thermocycling.
Evaluación de la morfología de conductos en incisivos mandibulares permanentes mediante tomografías computarizadas de haz de cono
(2019-10-14) Durán Urdiales, Daniela Belén; González Neira, Cintya Camila; Álvarez Vásquez, José Luis; González Neira, Cintya Camila
Objective: To evaluate the morphology of root canals in permanent mandibular incisors, using cone-beam computed tomographies available in the Department of Radiology of the School of Dentistry of the University of Cuenca. Materials and methods: A total of 753 tomographic images of permanent mandibular incisors were analyzed. To determine the number of roots, number of root canals and Vertucci classification, each mandibular incisor was analyzed in the three planes of space. To establish the third bifurcation of the root canal, the evaluated dental piece was measured from the amelocementary limit to the apex and divided into equal thirds. Results: 100% of mandibular incisors evaluated presented a root. The prevalence of second root canals was 8.8%, being higher in lateral incisors and in the male sex. The most prevalent Vertucci configuration was type I (91.2%), followed by type III (6.6%), type V (1.5%), type VII (0.4%); Type II configuration (0.1%) and root canal morphology different from Vertucci configuration (0.1%) occurred only in central incisors. The most prevalent bifurcation position was in the middle third (69.7%) in both central and lateral incisors. Conclusions: The total of the sample studied presented a single root. The prevalence of second root canals was higher in males and in lateral incisors. The most prevalent Vertucci configuration was type I, followed by type III. The most prevalent bifurcation position was in the middle third.