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

Degree of standardisation in ceramic gingival systems

2023 Descuentos MDPI This research received no external funding.No gingival shade guide exists that can be used as a 'gold standard' in gingival shade selection. This research, therefore, aimed to determine whether comparable results in subjective gingival shade selection can be achieved using basic gingival colours produced by distinct manufacturers. It also aimed to explore how coverage of the colour space is affected by mixing these basic colours to create additional shades. To achieve these objectives, the basic gingival colours of three ceramic systems (Heraceram, Kulzer, Madrid, Spain; Vita VM9, Vita Zahnfabrik, Bad Sackingen, Germany; IPS Style, Ivoclar, Schaan, Liechtenstein) were analysed. The colour systems were expanded by creating porcelain gingival samples, whose colours were obtained by mixing the basic colours, altering each mixture by increments of 10%, and respecting the numerical order used by manufacturers to identify the colours. The colour coordinates of the basic and additional colours were recorded using spectrophotometry, and the intra- and inter-system colour differences were calculated using the Euclidean (Delta Eab) and CIEDE2000 (Delta E00) formulae. None of the basic colours in the three systems, despite their similar nomenclature, were found to be interchangeable (the colour differences exceeded the gingival acceptability threshold: Delta E00 2.9 units). The expanded gingival colour systems, with mixtures altered by 10% increments, notably increased the gingival colour space covered by the original systems. The authors concluded that there are clear differences between the basic gingival colours produced by distinct manufacturers using the same nomenclature. Ceramic samples produced by mixing basic gingival colours are a resource with the potential to improve subjective gingival shade matching.Depto. de Odontología Conservadora y PrótesisFac. de OdontologíaTRUEpubDescuento UC

Influence of the use of transepithelial abutments vs. titanium base abutments on microgap formation at the dental implant–abutment interface: an in vitro study

2023 Descuentos MDPIThis in vitro study aimed to assess the presence of microgaps at the implant-abutment interface in monolithic zirconia partial implant-supported fixed prostheses on transepithelial abutments versus Ti-base abutments.Methods: Sixty conical connection dental implants were divided into two groups (n = 30). The control group consisted of three-unit bridge monolithic zirconia connected to two implants by a transepithelial abutment. The test group consisted of monolithic zirconia three-unit restoration connected to two implants directly by a titanium base (Ti-base) abutment. The sample was subjected to thermocycling (10,000 cycles at 5 degrees C to 55 degrees C, dwelling time 50 s) and chewing simulation (300,000 cycles, under 200 N at frequencies of 2 Hz, at a 30 degrees angle). The microgap was evaluated at six points (mesiobuccal, buccal, distobuccal, mesiolingual, lingual, and distolingual) of each implant-abutment interface by using a scanning electron microscope (SEM). The data were analyzed using the Mann-Whitney U tests (p > 0.05).Results: The SEM analysis showed a smaller microgap at the implant-abutment interface in the control group (0.270 mu m) than in the test group (3.902 mu m). Statistically significant differences were observed between both groups (p < 0.05).Conclusions: The use or not of transepithelial abutments affects the microgap size. The transepithelial abutments group presented lower microgap values at the interface with the implant than the Ti-base group in monolithic zirconia partial implant-supported fixed prostheses. However, both groups had microgap values within the clinically acceptable range.Sociedad Española de Prótesis Estomatológica y EstéticaDepto. de Odontología Conservadora y PrótesisFac. de OdontologíaFac. de Ciencias FísicasTRUEpubDescuento UC

Outcome measurements and quality of randomized controlled clinical trials of tooth-supported fixed dental prostheses: A systematic review and qualitative analysis

Abstract Statement of problem The lack of consensus regarding a standardized set of outcome measurements and noncompliance with current reporting guidelines in clinical trials of tooth-supported fixed dental prostheses (FDPs) hamper interstudy comparability, compromise scientific evidence, and waste research effort and resources in prosthetic dentistry. Purpose The primary objective of this systematic review was to identify all primary and secondary outcome measurements assessed in randomized controlled trials (RCTs) of tooth-supported FDPs. Secondary objectives were to assess their methodological quality by using the Cochrane Collaboration's risk of bias tool (RoB, v2.0) and their reporting quality by means of a standardized 16-item CONSORT assessment tool through published reports. Material and methods An electronic search was conducted in MEDLINE, EMBASE, and Cochrane library to identify all RCT-related articles published in the past 10 years. Differences in RoB were tested with the Pearson chi-square test, and those in CONSORT score with the Student t test. Results A total of 64 RCTs from 79 publications were deemed eligible. The diversity of outcome measures used in the field is apparent. Twenty percent of the included studies had a low RoB, 79% showed some concerns, and 1% had a high RoB. The mean ±standard deviation CONSORT compliance score was 22.56 ±3.17. Trials adhered to the CONSORT statement reported lower RoB than those that did not adhere (P<.001). RCTs with a low RoB reported more comprehensive adherence to CONSORT guidelines than those with some concerns (MD 4 [95% CI 1.52-6.48]; P=.004). Conclusions A standardized core outcome reporting set in clinical research on tooth-supported FDPs remains evident. Adherence to the CONSORT statement continues to be low, with some RoB concerns that can be improved. Clinical Implications Adherence to the CONSORT statement when reporting a clinical trial of tooth-supported FDPs has been proven to reduce the risk of bias.Depto. de Odontología Conservadora y PrótesisFac. de OdontologíaTRUEinpres

Secuencia clínica ilustrada para la realización de prótesis parciales fijas sobre implantes. Resolución de problemas frecuentes

El proyecto comprende la inclusión en el Campus Virtual de la secuencia clínica de la planificación y tratamiento distintas modalidades de tratamiento de prótesis parciales fijas implantosoportadas. Se trata de un tratamiento realizado con mucha frecuencia en la actualidad y, por lo tanto, que tiene gran importancia hoy en día en la práctica clínica, por lo que resulta de crucial interés su conocimiento por el alumno. A pesar de tratarse de un tratamiento de menor complejidad dentro de las prótesis sobre implantes, la comprensión de las distintas modalidades de tratamiento, el conocimiento de los aditamentos y peculiaridades, conlleva unas dificultades añadidas para su comprensión por los estudiantes de grado, que en muchas ocasiones solicitan información complementaria para su adecuada comprensión. La introducción de una secuencia de tratamiento detallada, ilustrada, descriptiva, explicando las complicaciones que el clínico puede encontrar a cada paso así como las posibles soluciones clínicas a las mismas; supondrá a nuestro entender una herramienta muy útil para el alumno de grado. Tal y como se establece en los requisitos que se exigen para el grado de Odontología, extraídos a partir de las competencias descritas en el BOE 174, del 19 de Julio del 2008, Sec. 1, págs. 31687-31692, el alumno debe estar capacitado para el “Tratar el edentulismo tanto parcial como total, incluidos el diseño biológico (características específicas de diseño), preparación dentaria, dento-soportados y prótesis sencillas sobre implantes, tanto removibles como fijas, incluyendo su «colocación» y «puesta en servicio»”. Estas prótesis se englobarían dentro de éste concepto de "prótesis sencillas sobre implantes", pero que en base a nuestra experiencia clínica y docente consideramos que suponen para el alumno un desafío al que se enfrentará en su práctica clínica con conceptos básicos. En este sentido, mostrar la sistemática clínica completa de este tipo de tratamiento, detallada y accesible para el aluno de manera instantánea y desde el Campus Virtual puede ser de gran ayuda para su formación y afianzamiento de conocimientos. Con esta herramienta, la secuencia de tratamiento que el alumno debe conocer una vez terminado el Grado de Odontología, puede ser consultada desde el Campus Virtual 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 ayudará a solucionar las dudas que puedan surgirle durante la realización del tratamiento, y supondrá que sea consciente de ventajas, desventajas, modalidades de tratamiento, dificultad del caso a realizar

Accuracy between 2D Photography and Dual-Structured Light 3D Facial Scanner for Facial Anthropometry: A Clinical Study

(1) Background: Facial scanners are used in different fields of dentistry to digitalize the soft tissues of the patient’s face. The development of technology has allowed the patient to have a 3-dimensional virtual representation, facilitating facial integration in the diagnosis and treatment plan. However, the accuracy of the facial scanner and the obtaining of better results with respect to the manual or two-dimensional (2D) method are questionable. The objective of this clinical trial was to evaluate the usefulness and accuracy of the 3D method (a dual-structured light facial scanner) and compare it with the 2D method (photography) to obtain facial analysis in the maximum intercuspation position and smile position. (2) Methods: A total of 60 participants were included, and nine facial landmarks and five interlandmarks distances were determined by two independent calibrated operators for each participant. All measurements were made using three methods: the manual method (manual measurement), the 2D method (photography), and the 3D method (facial scanner). All clinical and lighting conditions, as well as the specific parameters of each method, were standardized and controlled. The facial interlandmark distances were made by using a digital caliper, a 2D software program (Adobe Photoshop, version 21.0.2), and a 3D software program (Meshlab, version 2020.12), respectively. The data were analyzed by SPSS statistical software. The Kolmogorov–Smirnov test revealed that trueness and precision values were normally distributed (p &gt; 0.05), so a Student’s t-test was employed. (3) Results: Statistically significant differences (p ≤ 0.01) were observed in all interlandmark measurements in the 2D group (photography) to compare with the manual group. The 2D method obtained a mean accuracy value of 2.09 (±3.38) and 2.494 (±3.67) in maximum intercuspation and smile, respectively. On the other hand, the 3D method (facial scanner) obtained a mean accuracy value of 0.61 (±1.65) and 0.28 (±2.03) in maximum intercuspation and smile, respectively. There were no statistically significant differences with the manual method. (4) Conclusions: The employed technique demonstrated that it influences the accuracy of facial records. The 3D method reported acceptable accuracy values, while the 2D method showed discrepancies over the clinically acceptable limits.Depto. de Odontología Conservadora y PrótesisFac. de OdontologíaTRUEpubDescuento UC