Browsing by Author "Gil Pozo, Jenny Alexandra"

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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.
Lesiones cervicales no cariosas (LCNC): Una revisión de la literatura
(Universidad de Cuenca, 2023-10-05) Quinchiguano Caraguay, Milton Alexis; Amoroso Calle, Esteban Eduardo; Gil Pozo, Jenny Alexandra
Attention Deficit Objective: The purpose of this literature review was to review and analyze the most important aspects, covering topics such as: Clinical characteristics,etiology, prevalence and treatment of non-carious cervical lesions (NCCL). Background: NCCL is defined as “the pathological loss of hard tooth substance caused by biomechanical loading forces; such loss is the result of flexing and degradation of enamel and/or dentin at some location distant from the actual point of loading.Caused by the synergistic action of the etiological mechanisms: erosion, abrasion and abfraction. In addition to risk factors such as: decreased pH and salivary quantity, dental morphology, dietary habits and inadequate brushing. The prevalence of NCCL increases with age and they are found mostly on the vestibular surfaces, with premolars and canines being the most affected teeth. The treatment ranges from clinical preventive therapy that focuses on modifying eating habits, stimulating salivary flow, using an appropriate brushing technique and intervention with other branches such as nutrition and psychology. Whereas, clinical therapy is based on diagnosis and is focused on reducing hypersensitivity, improving aesthetics, and restoring lost dental tissue. Material and Methods: A search of the literature related to the etiology, clinical characteristics will be developed. prevalence and treatment of NCCL in different databases. Conclusions: NCCLs are a frequent pathology of a multifactorial nature, where a correct diagnosis is essential for its therapeutic approach.
Preparaciones dentarias en prótesis fija dentosoportada: revisión sistemática
(2013) Gil Pozo, Jenny Alexandra; Abad Coronel, Cristian Gustavo
The principles of tooth preparation are commonly as: biological, biomechanical an aesthetic. Biological factors are influencing the health of periodontal tissues and pulp, the biomechanical (or technical) will affect the integrity and durability of the restorations, and aesthetic factors are related to the natural appearance of the restorations. These principles are routinely modified to suit various clinical situations. Proper tooth preparation intended to prosthodontics treatment should allow successful reproduction of anatomical contours and emergence profiles. Besides providing an appropiate thickness for each type of structure, without exceeding the limitations of each material as well as maintain the biological integrity of the related tissues
Two possible in vitro alternatives to evaluate the effect of gastric acid on resin-based composites
(2022) Gil Pozo, Jenny Alexandra
Background: Objective: To compare two in-vitro protocols to study the effect of simulated gastric acid on the mechanical properties of resins based composites(RBCs). Material and Methods: Three RBC FILTEK Supreme XTE (FS), BRILLIANT EverGlow (BE), GrandioSo (GS) were used. They were randomly divided into a control group (CG) and two groups exposed to simulated gastric acid: a 6-month daily protocol (DG) and an accelerated 90-min protocol (AG). Vickers microhardness (VH) and flexural strength were evaluated at baseline and six months. Statistical analysis was performed using repeated measures ANOVA tests for VH and three-way for flexural strength data (α=0.05). Results: Daily exposure in the CG and DG groups caused a reduction in VH values and flexural strength (p<0.05). The majority of values in the AG remained stable, after an exposure of 90 min; FS (p=0.118) and GS (p=0.729) in VH and FS (p=0.377), BE (p=0.692) and GS (p=0.672) in flexural strength. Conclusions: Daily exposure during 6 months caused significant changes in the VH values and flexural strength of the RBCs. The acid-accelerated protocol did not cause the same magnitude of change in VH values and flexural strength seen at six months of daily exposure © 2022,Journal of Clinical and Experimental Dentistry.