Estudio comparativo in vitro sobre la resistencia de la unión entre resinas compuestas en estructuras de fibras de carbono versus cerámica en estructuras de cromo-cobalto

Depto. de Odontología Conservadora y PrótesisFac. de OdontologíaFALSEunpu

Soft tissue thickness evaluation in screw-retained crowns by the biologically oriented preparation technique (BOPT)

Intraoral scanner evaluation (3Shape, TRIOS®) of soft tissue thickness around convergent collar implants and shoulderless abutments. Ambispective longitudinal analytical study with a sample size of 26 implants in 17 patients treated in a private denta

Evaluation of peri-implant soft and hard tissues behavior in screw-retained crowns by the biologically oriented preparation technique (BOPT) : ambispective longitudinal analytical study

Clinical and radiographic evaluation of soft and hard tissues around convergent collar implants and shoulderless abutments. Material and Methods: Ambispective longitudinal analytical study with a sample size of 32 implants in 21 patients t

Secuencia clínica ilustrada para la realización de coronas unitarias y prótesis parciales sobre implantes en materiales estéticos con fabricación CAD/CAM. Resolución de problemas frecuentes

La finalidad de este proyecto es mostrar la sistemática clínica completa de esta modalidad de tratamiento, coronas unitarias y prótesis parciales sobre implantes en materiales estéticos por fabricación CAD/CAM, de manera detallada y accesible para el alumno de manera instantánea y a distancia desde el Campus Virtual de la Universidad Complutense de Madrid. Con esta herramienta, la secuencia de tratamiento para este tipo de tratamientos, que el alumno debe conocer una vez terminado el Grado de Odontología, puede ser consultada desde el Campus Virtual UCM con fotografías y explicaciones de cada paso del proceso clínico; del mismo modo, la disponibilidad de una serie de preguntas frecuentes servirá como proceso de aprendizaje, ya que le orientará sobre la calidad del tratamiento que va a desarrollar, le implicará en el conocimiento a priori del mismo, así como le hará darse cuenta de los posibles fallos que puede cometer durante el desarrollo del tratamiento, lo que supondrá que sea consciente de ellos y esté más preparado para su resolución

Secuencia clínica ilustrada para la realización de rehabilitaciones metal-porcelana de arcada completa sobre implantes. Resolución de problemas frecuentes.

El proyecto solicitado comprende la inclusión en el Campus Virtual de la secuencia clínica de la planificación y tratamiento de rehabilitaciones de arcada completa implantosoportadas de metal-porcelana, explicada paso a paso, ademas de otro archivo con la resolución de lo problemas frecuentes. Su finalidad es la de ilustrar la secuencia clínica en la confección de los rehabilitaciones de arcada completa sobre implantes, con estructura metálica y recubrimiento de porcelana como material estético, para crear un acceso directo por parte del alumno así como su consulta desde cualquier ubicación, de manera que no requiriese presencialidad. Además, plantea la resolución de las dudas más frecuentes del proceso de manera que pudieran ser consultadas siempre que el alumno lo requiriera y le fomentara un aprendizaje basado en la resolución de problemas

Encerado diagnóstico digital de los pacientes por parte de los alumnos de quinto de carrera. Estudio piloto

Con este proyecto nos proponemos introducir un aspecto básico del diagnóstico protésico y estético, el encerado digital. El objetivo final es proporcionar al alumno material de trabajo y herramientas que le permitan estudiar, aprender y practicar este procedimiento diagnóstico sin su presencia física en la facultad, o sin la necesidad de utilizar herramientas analógicas como se viene haciendo desde hace años.Depto. de Odontología Conservadora y PrótesisFac. de OdontologíaFALSEsubmitte

Comparative In Vitro Study of the Bond Strength of Composite to Carbon Fiber Versus Ceramic to Cobalt-Chromium Alloys Frameworks for Fixed Dental Prostheses

Purpose: The aim of this comparative in vitro study was to assess the bond strength and mechanical failure of carbon-fiber-reinforced composites against cobalt–chrome structures with ceramic veneering. Materials and methods: A total of 24 specimens (12 per group) simulating dental prosthetic frameworks were fabricated. The experimental specimens were subjected to a thermocycling aging process and to evaluate bond strength. All specimens were subjected to a three-point bending test to fracture using a universal testing machine. Results: The cobalt–chrome/ceramic group yielded a bond strength value of 21.71 ± 2.16 MPa, while the carbon-fiber-reinforced composite group showed 14.50 ± 3.50 MPa. The failure assessment reported statistical significance between groups. Although carbon-fiber-reinforced composite group showed lower bond strength values, the chipping incidence in this group was as well lower. Conclusions: The chrome–cobalt/ceramic group showed greater bonding strength compared to the carbon-fiber-reinforced composite; most of the fractures within the cobalt–chrome/ceramic group, had no possibility of direct clinical repair.Sin financiación3.623 JCR (2020) Q2, 79/162 Chemistry, Physical0.682 SJR (2020) Q2, 180/638 Material Science (Miscellaneous)No data IDR 2020UE

Influence of the dental arch and number of cutting-off and rescanning mesh holes on the accuracy of implant scans in partially edentulous situations

Objectives:To evaluate the influence of the dental arch and cutting-off and rescanning procedures on the accuracy of complete-arch implant scans in partially edentulous arches. Material and methods: A maxillary and a mandibular partially edentulous typodont with implant abutment analogs placed in the right and left first molar and right central incisor sites were digitized to create reference models by using an industrial optical scanner (7 Series Desktop Scanner; Dentalwings). Two experimental groups were scanned using an intraoral scanner (IOS) (TRIOS 4; 3Shape A/S): the Maxillary group (Mx) and the Mandibular group (Mb). Four subgroups were generated depending on the number of rescanned mesh holes: No holes (Mx-G0, Mb-G0), 1 hole (Mx-G1, Mb-G1), 2 holes (Mx-G2, Mb-G2) and 3 holes (Mx-G3, Mb-G3). A 3-dimensional metrology software (Geomagic Control X; 3D Systems) was used to measure the difference between the reference and the experimental scans computing the root mean square (RMS) error calculation. Two-way ANOVA and a post-hoc Tukey test were used to analyze the trueness data (α=0.05). Levene test was used to evaluate the prevision (α=0.05). Results: The Mx group obtained a trueness mean value of 54 ± 17 µm and a mean precision value of 54 ± 17 µm, while the Mb group presented a trueness mean value of 67 ± 23 µm and a mean precision value of 66 ± 22 µm. The Mx group demonstrated significantly better trueness than the Mb group (P<.001). The G0 and G1 subgroups had the highest trueness values among the subgroups tested. No significant difference was observed between G0 and G1, G1 and G2, and G2 and G3 subgroups in trueness and precision. However, the G0 had significantly better trueness and precision values compared to G2 and G3 subgroups. In addition, the G1 had significantly better trueness values than the G3 subgroup. However, the Levene test revealed no difference in the precision mean values among the subgroups tested. Conclusions: Implant scanning trueness was affected by the dental arch and the number of rescanned mesh holes using the IOS tested. A higher number of rescanned mesh holes decreased the scanning trueness. The stitching algorithm of the IOS software tested after the mesh hole scan demonstrated a significant error, especially when multiples mesh holes are involved in the same arch. Clinical significance: Given that cutting-off and rescanning techniques can reduce trueness, clinicians should consider whether these techniques are necessary in complete digital workflows. This is particularly important when fabricating multiple single implant-supported restorations in the same arch.Sin financiación4.4 Q1 JCR 20221.189 Q1 SJR 2022No data IDR 2022UE

Influence of print orientation and wet-dry storage time on the intaglio accuracy of additively manufactured occlusal devices

Statement of problem Different factors can affect the manufacturing accuracy of additively manufactured dental devices; however, the influence of print orientation and wet-dry storage time on their intaglio accuracy remains uncertain. Purpose The purpose of this in vitro study was to assess the effect of print orientation (0, 45, 70, and 90 degrees) and wet-dry storage time (0, 30, 60, and 90 days) on the intaglio accuracy of additively manufactured occlusal devices. Material and methods An occlusal device design was obtained in a standard tessellation language (STL) file format (control file) which was used to fabricate all the specimens by using a stereolithography printer (Form 3+) and a biocompatible resin material (Dental LT Clear Resin, V2). Four groups were created based on the print orientation used to manufacture the specimens: 0, 45, 70, and 90 degrees. Each group was divided into 4 subgroups depending on the time elapsed between manufacturing and accuracy evaluation: 0, 30, 60, and 90 days. For the subgroup 0, a desktop scanner (T710) was used to digitize all the specimens. The 30-day subgroup specimens were stored for 30 days with the following daily storage protocol: 16 hours inside a dry lightproof container, followed by 8 hours in artificial saliva (1700-0305 Artificial Saliva) inside the same lightproof container. The specimens were then digitized by following the same procedures used for subgroup 0. For the subgroups 60 and 90, the identical procedures described for subgroup 30 were completed but after 60 and 90 days of storage, respectively. The reference STL file was used to measure the intaglio discrepancy with the experimental scans obtained among the different subgroups by using the root mean square error calculation. Two-way ANOVA and post hoc Tukey pairwise comparison tests were used to analyze the data (α=.05). Results Print orientation (P<.001) and usage time (P<.001) were significant predictors of the trueness value obtained. Additionally, the 0-degree print orientation at day 0 group demonstrated the best trueness value among all the groups tested (P<.05). No significant trueness discrepancies were found among the 45-, 70-, and 90-degree print orientation, or among the 30, 60, and 90 days of storage. A significant precision difference was found in the variance between print orientation groups across usage time subgroups. Conclusions The print orientation and wet-dry storage times tested influenced the trueness and precision of the intaglio surfaces of the occlusal devices manufactured with the 3D printer and material selected

Secuencia clínica ilustrada para la realización de rehabilitaciones sobre implantes con flujo digital. Resolución de preguntas frecuentes

La finalidad de este proyecto es mostrar la sistemática clínica completa de una modalidad de tratamiento odontológico de gran complejidad y que representa uno de los mayores desafíos para el profesional: las rehabilitaciones fijas de arcada completa sobre implantes. Además, se presenta un tratamiento mediante un flujo de trabajo digital, registrado de manera detallada, y haciéndolo accesible para el alumno de manera instantánea y a distancia desde el Campus Virtual. Con esta herramienta, la secuencia de tratamiento puede ser consultada desde el Campus Virtual con fotografías y explicaciones de cada paso del proceso clínico y le orientará sobre la calidad del tratamiento que va a desarrollar, le implicará en el conocimiento a priori del mismo, así como le hará consciente de los posibles fallos que puede cometer durante el desarrollo del tratamiento, lo que supondrá que esté más preparado para su resolución cuando se le presenten en su práctica clínica