Aim. To analyze the risk factors by logistic regression and perform the analysis of the survival rate of osseointegrated dental implants placed in public and private institutions. Methods. An analytic-multicentric study was carried out, where 1279 dental implants that were placed by specialists from January 2006 to October 2017 in public and private institutions (UPCH-SI, HCFAP, CMNAVAL, UPCH-SM, and UPSJB) were evaluated. The variables sex (X1), location (X2), hypertension (X3), antibiotic prophylaxis (X4), diabetes (X5), osteoporosis (X6), bisphosphonates (X7), history of periodontitis (X8), hypercholesterolemia (X9), bone quality (X10), bone quantity (X11), design (X12), smoker (X13), connection (X14), edentulism type (X15), staging (X16), 3D guided surgery (X17), load (X18), bone graft (X19), peri-implantitis (X20), mucositis (X21), and GBR (X22) were collected and analyzed by the Kaplan–Meier survival analysis. The logit analysis was performed among all the variables to choose the best statistical model that explains the true risk factors. The analysis was performed by multivariate logistic regression and the Kaplan–Meier test, at a level of statistical significance of p<0.05. Results. It was found that the failure rate of the 1279 implants evaluated was 17.98% corresponding to only 23 implants lost as they have good longevity over time. When establishing the best multivariate logistic regression model, it was found that the variables that remained stable in relation to their statistically significant value and more stable confidence intervals were age, osteoporosis, bisphosphonates, history of periodontitis, bone quality, bone graft, connection, number of implants, GBR (guided bone regeneration), and follow-up. Conclusions. Dental implants placed by specialists in public and private institutions had a failure rate similar to that in studies previously published in other countries.

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Publishing scientific articles allows for disseminating the results of a study and concludes the research process; such publication allows the academic to develop more research skills. Objective: To analyze the factors associated with the production of scientific articles in university professors. Material and Methods: Analytical cross-sectional study that collected the amount of articles published in the Scopus and SciELO databases by ordinary professors of the Faculty of Dentistry of the National University of San Marcos (Lima, Peru). Associated factors included: sex, teaching category, dedication time, academic degree, positions at other universities, professional experience and teaching courses related to scientific research. Results: 20.8% of academics presented at least one article published. Male sex (OR = 1.12, 95% CI: 1.04-2.49), working at one university only (OR = 1.39, 95% CI: 1.12-2.71), teaching courses related to research methodology (OR = 1.35, 95% CI: 1.05-4.27) and having more than 10 years' experience in university teaching (OR = 2.95, 95% CI: 2.1-8.97) were factors associated with greater scientific production. Conclusions: One fifth of ordinary professors presented scientific production in the databases Scopus and SciELO, with the main factors associated with a greater production of scientific articles being sex, course teaching, number of years in teaching and number of work-institutions.

Aim: To compare the application of silane in the bond strength of fiberglass posts in different thirds of the cemented root with a self-adhesive system in an ex vivo study. Materials and methods: Freshly extracted teeth were collected, which had indication of extraction for periodontal or orthodontic reasons. The study evaluated n = 42 specimens that were divided into two large groups: I (control, without silane) and II (with silane); the resistance to adhesion in the respective thirds of the root (cervical, middle, and apical) was also evaluated. The prefabricated fiberglass posts were cemented with and without silane according to the manufacturer's instructions and were cemented with a resin-based cementing agent. The adhesion strength test was evaluated by the universal testing machine. Results: According to the results of this experimental trial, the fiberglass posts that did not receive silane had the highest adhesion strength of 26.5 ± 10.6 MPa, while silane-cemented posts only had 21.7 ± 8.1 MPa. The statistical analysis was performed using the Kruskal-Wallis test and work with a level of significance of p < 0.05. Conclusion:The use of silane as part of the cementing protocol in fiberglass posts does not influence the adhesion strength between the surfaces of the posts and the resin cement because there were statistically significant differences between both adhesion protocols. Clinical significance: This study has a great impact because according to the results, clinical decisions can be made when cementing the fiberglass posts through the application of silane or not.

Aim:The aim of the present study was to develop and validate the psychometric properties of the questionnaire (POCTOIR-30) for the evaluation of the perception of clinical training and future goals of residents of oral implantology. Materials and methods: The development of the questionnaire followed the process of five phases: (a) preparation of the instrument, (b) validation of the content, (c) validity of the construct, (d) evaluation of internal consistency and reliability, (e) evaluation of the level of knowledge, for which an instrument on implant training of residency programs was used as a reference. To evaluate the sensitivity and validity of the questionnaire, a pilot sample of 20 residents between 20 years and 50 years of a residency program in oral implantology was used. Results: The factor analysis of the data and the adjustment statistics process resulted in the quality care of 4 factors and 30 questions that were included in the present questionnaire (POCTOIR), which covers: logistics and infrastructure (five items), training in oral implantology (10 items); information on the postgraduate program (seven items) and accessibility and sustainability of care (ten items) and future goals after postgraduate studies (five items). Content validity was measured using the index that combines the ease of calculation and the evaluation of results at the statistical level (κ 0.833). The reliability of the instrument was evaluated to measure the degree of internal correlation (Cronbach's α 0.738). Finally, the reliability was evaluated to measure the constancy of the responses repeatedly with the same subjects (intraclass correlation 0.74). Conclusion:This study showed that the POCTOIR-30 instrument has adequate levels of validity and reliability to be used in residents of areas related to oral implantology in new research. Clinical significance: The impact of the academic training of the residents in oral implantology significantly influences their performance at the time of performing the surgical and prosthetic protocols. Therefore, this research validates statistically the perception of academic training and future goals of postgraduate residents in order to quantify and apply improvement strategies during their years of study.