Browsing by Author "Pacheco Orellana, Clara Alejandra"

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Cambios corticales en los dientes anteriores superiores e inferiores con Brackets convencionales, Damon y biofuncional QR en pacientes de trece a veinte y cuatro años
(2016) Pacheco Orellana, Clara Alejandra; Llanes Serantes, Maribel
There are several treatment systems for orthodontics which should be analyzed to avoid alterations in the periodontium, especially in cortical alveolar processes. Therefore, the aim of this study is to learn about the alveolar bone changes; resorptions, appositions or no bone change at all. To carry out this study, three Treatment Systems were used as samples: The Self-ligating Damon System, Biofunctional QR System and Conventional Systems with Roth and MBT prescription, the brackets were used with 18 patients (six for each system), who underwent tomography before the treatment as well as after completing the stage of alignment and leveling. Drawings were used in the tomographic studies in order to measure, with millimeters, the vestibular cortical alveolar, palatal maxillary, vestibular cortical and lingual mandibular of the six upper and lower anterior teeth, bringing the sample to 216 teeth. To obtain the results of the study, the data was entered into an Excel spreadsheet and processed statistically by using SPSS version 22 software, with ANOVA and Tukey tests, the results for the average bone resorption was p= 0,05 and with the Biofunctional QR System p= 0,025, the latter showed apposition in the mandibular lingual cortical. In conclusion all treatment systems cause bone resorption, the most resorption is caused by the Damon System, followed by the Conventional System and then the Biofunctional QR System, the latter produces a statistically significant apposition. In the upper anterior teeth, there were no significant osseous changes and in the lower anterior teeth the greatest resorption was in tooth 42 and 32 and apposition in tooth 41
RELACIÓN ENTRE LA POSICIÓN CONDILAR Y EL PATRÓN FACIAL OBSERVADOS EN TOMOGRAFÍAS CONE BEAM REALIZADAS EN UN CENTRO RADIOLÓGICO PRIVADO DE QUITO, ECUADOR, EN ADULTOS DE 18 A 50 AÑOS, DURANTE EL PERÍODO 2022-2024
(Universidad de Cuenca. Facultad de Odontología, 2006-01-12) De la Torre Maldonado, Juan Sebastián; Pacheco Orellana, Clara Alejandra
The aim of this study was to determine the variations in condylar position according to different facial patterns, through the analysis of tomographic images of patients aged 18 to 50 years, obtained at the Centro Radiológico Global Imagen in Quito, Ecuador, during the period 2022– 2024. A quantitative approach was used, with an observational, descriptive, and comparative design, cross-sectional and retrospective in nature. A total of 57 tomographies were reviewed, from which 45 were selected to form homogeneous groups of facial biotypes according to the Björk–Jarabak classification: normodivergent (mesofacial), hyperdivergent (dolicofacial), and hypodivergent (brachyfacial), with 15 tomographies assigned to each category. The sagittal analysis of the articular spaces was conducted following the methodology proposed by Ikeda (2009), obtaining measurements of the anterior space (EA), superior space (ES), and posterior space (EP) of the right and left condyles in each tomographic study. The collected data were processed using frequency analysis, correlation analysis, variance analysis (ANOVA), and Tukey’s post hoc test, with IBM SPSS Statistics software, version 27.0. The results showed that brachyfacial patients presented higher values in the superior space (ES) and, particularly, in the posterior space (EP), compared with dolicofacial and mesofacial biotypes, with the latter displaying a statistically significant difference. These findings support the acceptance of the study’s alternative hypothesis, which proposes the existence of a relationship between facial biotype and condylar position.