Browsing by Author "Astudillo Ortiz, Jaime Leonardo"

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Accuracy in marginal and/or internal adaptation of full-coverage fixed prostheses made with digital versus conventional impressions: an overview of systematic reviews and meta-analysis
(2023) Delgado Gaete, Bolivar Andres
Aim: The study aimed to verify compliance of the systematic reviews with the requirements established by the scientific community and demonstrate the validity and reliability of the systematic reviews conducted on the accuracy (marginal adaptation and/or internal adaptation) of the full-coverage fixed prostheses made with digital impressions versus conventional impressions. Methods: A search was performed for systematic reviews in three electronic databases, PubMed, Scopus, and Web of Science, as well as in the gray literature. In the search strategy, medical subject heading (MeSH) words were used in PubMed, and free terms were used for the titles and abstracts of each article. Each keyword was separated by the Boolean operator OR and later combined with the Boolean operator AND. Six systematic reviews were included for qualitative synthesis. To assess the methodological quality of the included systematic reviews, the AMSTAR 2 tool was used. Results: The search yielded 131 studies, of which 78 remained after removing duplicates. The title and abstract of each chosen study were assessed, and 22 articles were included for full-text reading. Finally, six studies were included, of which three studies were considered to have low confidence, while the other three were considered to have critically low confidence. In addition, the six SRs evaluated the adaptation or marginal fit, while only three studies measured internal adaptation. Conclusion: The use of digital impressions in single fixed prostheses maintains a marginal level within the limit of clinical acceptability; however, the methodological quality of systematic reviews is poor, according to the AMSTAR 2 tool.
Accuracy in the Marginal Adaptation and/or Internal Adaptation of Full-coverage Fixed Prostheses Made with Digital Impressions and Conventional Impressions: A Systematic Review
(2023) Astudillo Ortiz, Jaime Leonardo
Aim: The study aimed to verify compliance of the systematic reviews with the requirements established by the scientific community and demonstrate the validity and reliability of the systematic reviews conducted on the accuracy (marginal adaptation and/or internal adaptation) of the full-coverage fixed prostheses made with digital impressions versus conventional impressions. Methods: A search was performed for systematic reviews in three electronic databases, PubMed, Scopus, and Web of Science, as well as in the gray literature. In the search strategy, medical subject heading (MeSH) words were used in PubMed, and free terms were used for the titles and abstracts of each article. Each keyword was separated by the Boolean operator OR and later combined with the Boolean operator AND. Six systematic reviews were included for qualitative synthesis. To assess the methodological quality of the included systematic reviews, the AMSTAR 2 tool was used. Results: The search yielded 131 studies, of which 78 remained after removing duplicates. The title and abstract of each chosen study were assessed, and 22 articles were included for full-text reading. Finally, six studies were included, of which three studies were considered to have low confidence, while the other three were considered to have critically low confidence. In addition, the six SRs evaluated the adaptation or marginal fit, while only three studies measured internal adaptation. Conclusion: The use of digital impressions in single fixed prostheses maintains a marginal level within the limit of clinical acceptability; however, the methodological quality of systematic reviews is poor, according to the AMSTAR 2 tool.
Accuracy in the marginal adaptation and/or internal adaptation of full-coverage fixed prostheses made with digital impressions and conventional impressions: A systematic review
(Universidad de Cuenca, 2023-03-21) Cajas Guamán, María Augusta; Cabrera Toro, María Marcela; Astudillo Ortiz, Jaime Leonardo
Objective: To verify compliance with the requirements established by the scientific community and to demonstrate the validity and reliability of the systematic reviews on the accuracy (marginal adaptation and/or internal adaptation) of the full-coverage fixed prostheses made with digital impressions versus conventional impressions. Methods: Searches were performed in three electronic databases, PubMed, Scopus, and Web of Science, as well as in the gray literature. In the search strategy, medical subject heading (MeSH) words were used in PubMed, and free terms were used for the titles and abstracts of each article. Each keyword was separated by the Boolean operator OR to later be combined with the Boolean operator AND. Six systematic reviews were included for qualitative synthesis. To assess the methodological quality of the included systematic reviews, the AMSTAR 2 tool was used Results:The search yielded 131 studies, of which 78 remained after removing duplicates. The title and abstract of each chosen study were assessed, and 22 articles were included for full text reading. Finally,six studies were included, of which three studies were considered to have low confidence, while the other three were considered to have critically low confidence. In addition, the six SRs evaluated the adaptation or marginal fit, while only three studies measured internal adaptation. Conclusions: The use of digital impressions in single fixed prostheses maintains a marginal level within the limit of clinical acceptability, however, the methodological quality of systematic reviews is poor, according to the AMSTAR 2 tool.
Curvatura radicular de primeros premolares mandibulares en tomografía computarizada de haz cónico (CBCT)
(2017) Medina Quizhpe, Sylvia Maribel; Paqui Zhunaula, Genny Fabiola; Astudillo Ortiz, Jaime Leonardo
Objective: The objective of the present study was to determine the degree of angulation and root orientation of the first mandibular premolar in cone beam computed tomography (CBCT). Methods: The sample consisted of 111 mandibular first premolars of 67 tomographic studies from the archives of the Faculty of Dentistry of the University of Cuenca (August 2015-October 2016) and the Medimagen Radiological Center (March-October 2016); the software One Volume Viewer (J. Morita Corporation, Irvine, California, USA) and Galileos Implant (Sirona The Dental Company; Earlangen Germany) were used to perform sagittal and coronal sections of the 3D image that served to observe the orientation of the root curvature and also allowed to measure the angle with the Schneider method. Results: The average angle of curvature was 16.03 °. The curvatures were classified as: mild = 0.1 ° -12.2 °; moderate = 12.3 ° -17.2 °; severe = 17.3 ° -40.5 °, those roots that did not form an angle were included as straight. Conclusion: In the study sample the moderate curvature was the most prevalent and the orientation was in the distal direction
Estado de las prótesis parciales removibles realizadas en los pacientes atendidos en la Facultad de Odontología de la Universidad de Cuenca en el periodo 2012-2015
(2017) Saquipulla Carchi, Juan Carlos; Sánchez Morocho, Diego Omar; Astudillo Ortiz, Jaime Leonardo
The current study had as an objective to determine the status of the partial removable prosthesis performed in patients cared for at the Faculty of Dentistry of the University of Cuenca during 2012-2015. Materials and methods: A cross-sectional descriptive study was done in a total of 78 patients who received removable partial denture treatment at our institution in the period 2012-2015, but this was reduced to a total of 43 patients who underwent this study. An analysis of the prosthetic state was performed based on the data obtained with the following variables: sex, age, and year of prosthesis, dental arch, Kennedy classification, occlusion, Presence of exogenous pigments and the presence of sub prosthetic stomatitis through a clinical examination prepared for the study. Results: The results of this study demonstrate that the prosthetic status in patients performed partial removable prostheses was: very good in 37.2%; Followed by regular prosthetic status in 34.9%; Good prosthetic condition in 20.9%; And finally bad prosthetic status by 7%. People in the age of 40-60 years had a very good prosthetic state, in this study there is a higher percentage of women, in the year 2015 the largest number of removable partial dentures was performed, the dental arcade Inferior was the more predominant than the superior, Kennedy's class I and II was found more frequently and in its great majority of patients we found absence of stomatitis, thus presenting a very good prosthetic state
Estado de las prótesis totales removibles en los pacientes atendidos en la Facultad de Odontología de la Universidad de Cuenca en el periodo 2012-2015
(2017) Delgado Dávila, Andrés Mauricio; Pilco Ordóñez, Wilson David; Astudillo Ortiz, Jaime Leonardo
The prosthetic status is important to be studied because having an inadequate status causes the affectation of the stomatognathic system. Objective: This study aimed to analyze the status of removable total dentures in a sample of bimaxillary edentulous patients, attended at the Faculty of Dentistry of the University of Cuenca in the period 2012-2015. Materials and Methods: This was a descriptive cross-sectional study, which was performed in 70 patients who consulted and received treatment. An analysis was made of the following aspects: bilateral balanced occlusion, oclusal vertical dimension, tooth loss, fractures, wear and year of performance of the prosthesis, by means of a questionnaire and a clinical examination prepared for the study. Results: 97.1% of patients presented poor conditions in their prostheses, according to gender and prosthetic status, with 100% of poor status of male prostheses, according to age, patients with less than 45 years old with 100% of poor prosthetic status and according to the year of production with 100% of poor prosthetic status in the 3, 4 and 5 year prosthetic groups, the least affected being the 2 year group with 97%. Wear was the most frequent alteration, with 57.1%. Conclusions: The prosthetic status of the patients treated at the Faculty of Dentistry of the University of Cuenca between 2012-2015 was poor, the highest frequency were female patients, older than 45 years and with two years of having had their prostheses
Estado de prótesis fija en los pacientes atendidos en la Facultad de Odontología de la Universidad de Cuenca en el periodo 2012 – 2015
(2016) Sánchez Avila, María Bernarda; Vélez Jaramillo, Andrés Sebastian; Astudillo Ortiz, Jaime Leonardo
A fixed prosthesis must meet several parameters to see if it is in a good or bad condition; the main that we consider are marginal type mismatch, chipping of the ceramica and periodontal health. The aim of this study is to determine the prosthetic status of patients with fixed prosthesis treated in the Dentistry school at the University of Cuenca between the years 2012 and 2015. A total of 149 patients from a universe of 293 patients treated since 2012 to 2015, 55 men and 94 women were analyzed by clinical examination , where the most predominant found was the presence of negative step between the fixed prosthesis and tooth preparation in a 48.3 % , the presence of gingivitis in a 63.1% , leading us to conclude that the prosthetic status in these patients is poor 87.9 %
Estado de prótesis fija en pacientes atendidos en una clínica odontológica docente del Ecuador
(Universidad de Cuenca, 2016) Vélez Jaramillo, Andrés Sebastiñan; Sánchez Ávila, María Bernarda; Astudillo Ortiz, Jaime Leonardo
The interest both ¡n the patient and the professional in finding edentulous spaces is to seek a fixed rehabilitation that can return, besides the aesthetic, ¡ts occlusal functionality, which can offer a better quality of life to the patient. The purpose of this study is to know the prosthetic status of patients with fixed prostheses treated at the Faculty of Dentistry of the University of Cuenca be- tween 2013 and 2015. We used a universe of 293 patients who were treated in the period 2013 - 2015, a total of 149 patients, 55 men and 94 women were reviewed. The parameters that were considered to know the state ofthe prosthesis were: Type of marginal misfit, ceramic chipping and periodontal health through clinical examination.
Éxito y fracaso de restauraciones postendodónticas individuales
(2018) Espinosa Granda, Vicente Eduardo; Torres Vicuña, Johnny Fabián; Astudillo Ortiz, Jaime Leonardo
Objective: The aim of this study was to determine the success or failure of postendodontic individual restorations (IPR), with a post-crown system, carried out in the Faculty of Dentistry of the University of Cuenca in the period 2012 - 2017. Methods: It was a descriptive cross-sectional study in which a sample of 121 IPR with post-crown was examined. A clinical analysis was performed to verify faults in the selected restorations. In cases of suspected post-crown system fracture, a radiographic analysis was made in order to corroborate the clinical evidence. Results: 87.6% of successful IPRs were evidenced. The most frequent cause of clinical failure was the de-coronation. The coronal ceramic restorations presented a success of 96.8%; while the IPR that had as a coronal restoration material to the acrylic, presented a 100% failure. Conclusions: With the present study it was possible to demonstrate a high percentage of success in the IPR performed in the Faculty of Dentistry of the University of Cuenca. The success was superior in: restorations located in posterior pieces and also in the pieces that used intra root cast metal posts; there is no difference in the percentage of success and failure between the different coronal restoration materials, except in IPR with acrylic crowns that showed total failure. The most frequent cause of failure was crown descementation
Factores de riesgo de la atrición dental severa: un estudio de casos y controles
(2019) Astudillo Ortiz, Jaime Leonardo; Lafebre Carrasco, Milton Fabricio; Ortiz Segarra, José Ignacio
Objective: to identify the risk factors of severe dental attrition in patients who attended public and private dental care institutions in the city of Cuenca-Ecuador. Materials and methods: were analyzed 237 adult patients, 79 cases, with dental attrition grades 2, 3 and 4 according to the Smith and Knight index and 158 controls with attrition grades 0 and 1. A clinical and photographic examination was carried out to determine the relationship between dental attrition and factors such as age, sex, origin, number of residual teeth, salivary pH and bruxism. Results: after a bivariate analysis, it was evident that patients older than 25 years (OR= 2,47; IC= 1,41 – 4,35; X2= 10,21; p= 0,001), with less than 20 teeth in the mouth ((OR= 4,95; IC= 1,47 – 16,62; X2= 7,97; p= 0,004 ) and with bruxism (OR= 2,64; IC= 1,45 – 4,81; X2= 10,49; p= 0,001) are more likely to have severe tooth attrition. After a binary logistic regression this relationship was confirmed: patients older than 25 years (OR= 2,03; IC= 1,08 – 3,818) with less than 20 teeth in the mouth (OR= 3,90; IC= 1,07 – 14,19) and with bruxism (OR= 3,22; IC= 1,70 – 6,10), however a very low predictive capacity of the adjusted variables was observed according to R-square of Cox and Snell (0.123) and Nagelkerke’s R-square (0.172). Conclusions: advanced age, minor quantity of teeth in mouth and bruxism increased the possibility of presenting dental severe attrition in the analyzed patients. While the masculine sex, the rural origin and the salivary critical pH (less than 6) do not behave as factors of risk.
Implementation of a multi-environment learning/teaching platform to improve the dental education quality
(Institute of Electrical and Electronics Engineers Inc., 2018) Bravo Torre, Jack Fernando; Vintimilla Tapia, Paúl Esteban; Bravo Torres, Wilson Daniel; Astudillo Ortiz, Jaime Leonardo; Cevallos Ludeña, Cinthya Maria; Bravo Torres, Wilson Daniel; Bravo Torres, Wilson Daniel
Nowadays, due to the constant advance of information and communication technologies (ICTs), a new society, whose main characteristic is to globalize access to information, is being deployed. Thus, ICTs are present in all aspects of everyday life, allowing anyone to obtain content of interest at any time. In this sense, education is not alien to this reality, so new paradigms of learning/teaching are unfolding. On the one hand, students are motivated to become knowledge producers, offering learning environments equipped with tools and resources according to their preferences. On the other hand, teachers are encouraged to improve the quality of their teaching, giving work environments provided with statistical analysis tools that allow to measure student progress. For these reasons, this paper proposes the development of a multi-environment learning/teaching platform based on ICTs, aimed at improving the educational experience of students and teachers. © 2018 IEEE.
Manejo estético del sector anterosuperior. Reporte de un caso clínico
(Universidad de Cuenca, 2020) Pinos Gavilanes, María Paz; Batista, Adriana; Astudillo Ortiz, Jaime Leonardo
Manejo estético del sector anterosuperior. Reporte de un caso clínico
(Universidad de Cuenca, 2018) Guamán Quintuña, Jaime Luis; Astudillo Ortiz, Jaime Leonardo
Prevalencia de cambios morfológicos condilares en radiografías panorámicas de un centro radiológico de la ciudad de Cuenca
(2016) Serrano Padrón, Monserrath Guillermina; Villavicencio Pesantez, Tamara Elizabeth; Astudillo Ortiz, Jaime Leonardo
The aim of this study was to determine the prevalence of the morphological condilar changes in panoramic radiographs of patients who went to a radiology center in the city of Cuenca. The sample of the study was of 250 panoramic radiographs where we determined the general prevalence of 95.4% of morphological condilar changes, of which 59.8% were female, 61.5% were between 51 and 70 years old, of these changes the upper partial edentulism was 80%, Kennedy’s class III was the most prevalent with 56.5%; the lower partial edentulism was 87%, where Kennedy's class III was the most prevalent with 50.4%. In the specific prevalence, it was 77.6% for flattened condyles, followed by condylar asymmetry with 55.8%, erosion with 13.2%, subchondral cyst with 8.8% and osteophyte with 6%.
Prevalencia de desgaste dental en estudiantes de la facultad de Odontología de la Universidad de Cuenca
(2017) Castillo Cárdenas, Jessica Viviana; Ramón Malla, Andrea Carolina; Astudillo Ortiz, Jaime Leonardo
The present study aims to determine the prevalence, grade and type of tooth wear in students of the Faculty of Dentistry of the University of Cuenca. Methods and materials. A descriptive study was conducted, where the sample was constituted by 151 students. In order to realize this study, it was carried out a dental clinical examination to evaluate the following factors: tooth wear, grade and type of tooth wear (abrasion, attrition, erosion, abfraction). Results: The results showed that there is a prevalence of dental wear of the 77.5% corresponding to 117 students. In terms of age, the group with more relevance was the 18 to 21 years who presented a 35.8%. It was also found a greater prevalence of tooth wear in the females with a 47%. Finally, attrition was the type of tooth wear more frequent with a 60.3%, which represents 91 students
Revisión sistemática de impresiones digitales Intraorales
(2019) Carrillo Vaca, David Gerardo; Astudillo Ortiz, Jaime Leonardo
Statement of the problem: Intraoral digital impressions may vary in precision and trueness (accuracy) between scanners, this issue needs to be studied. Objective: Analyze, and compare the characteristics of accuracy (precision and trueness) of intraoral digital impressions. Methods: A Medline/Pubmed and Cochcrane search was performed to identify relevant articles about precision and trueness in digital impressions. The search was limited to articles that describe the superimposition of STL files gained from a pattern for fixed partial prosthesis with an intraoral scanner. The articles were determined from the PICOS system recommended by the PRISMA guidelines. Results: Three studies accomplished the eligibility criteria. The scanners included, and their results respectively were: Bluecam: 12.7±2.6 um / 17.5±1.8 um, Omnicam: 12.5±3.7 um / 13.8±1.4 um. Carestream 3500: 0.014 mm / 13±1, Zfx Intrascan: 0.033 mm / 30±10-45, Bluecam: 0.029 mm / 22.5±25-30, Omnicam: 0.031 mm / 30±32.5-27.5, True definition: 0.011 mm / 10±2.5-7.5. E4D dentist: 97.6±109.2 um / 114.2±80.7 um, Fastscan: 26.0±24.4 um / 45.2±29.8 um, iTero: 25.8±22.5 um / 52.1±38.8 um, Trios: 13.0±12.1 / 49.7±36.6 um, Zfx Intrascan: 132.3±124.4 um / 89.4±64.2 um. The studies evaluated the precision and trueness from the superimposition of STL images they manage the results in microns, only one study managed the results in millimeters. Conclusions and implications: The superimposition demonstrated different values according to each scanner, scanners with better performance were: in precision Bluecam, Carestream 3500, Trios. While in trueness were: Omnicam, True Definition, Fastscan.
Revisión sistemática de la resistencia de prótesis fijas provisionales sobre implantes
(2019-11-26) Trujillo Jaramillo, María Cristina; Astudillo Ortiz, Jaime Leonardo
Objective: the main objective is to search for articles that analize the fracture resistence of materials frequently used for making temporary crowns over dental implants. Materials and methods: the pubmed and Cochrane data bases were used for the research, in order to find articles about the fracture resistence of diferent techniques, cad cam and conventional techniques, for making temporary crowns over dental implants. The PICOS system was used to determine the main features of articles during the research. The PICOS system is part of the PRISMA recomendations for systematic reviews and metanalysis. Results: three studies accomplised with the selection criteria previously determined, they used temporary materials such as PMMA, acrylic resins to analize the fracture resistence to compression and thermocycling. Two of the studies made temporary crowns, and the last one used a temporary material block. The results were: in the fist study to PMMA: 3034.3 (Tooth – P) and 1602.9 N (Tooth – T), in the group TiBase 1510.5 (TiBase – P) and 963.6 N (TiBase – T), in the group Chair 1609.4 (Chair – P) and 1253.0 N (Chair – T). In the second study Cerasmart G.C., in the group CHAIR 977. N, in the group LAB 1130.6 N and in the group TOOTH 1893. 0 N. The third study Yilmaz compared ten PMMA temporary material and acrylic resins, he found an average range to fracture the crown of 789 to 1380 nw. Conclussions: the results demonstrated that it doesn't depend on the technique, but it does the material used, for instance cadcam materials are more resistent in a long term compared to conventional materials and conventional techniques under mechanic fatigue and thermocycling.
Trastornos térmporomandibulares relacionados a factores oclusales: revisión de la literatura
(Universidad de Cuenca, 2020) Vélez Astudillo, Rómulo Andrés; Bravo Torres, Wilson Daniel; Alvarado Cordero, Jacinto José; Astudillo Ortiz, Jaime Leonardo