47 ± 174.39 N) (p ⟨ 0.001). A statistically significant difference was observed considering the failure mode (p = 0.036), with more favorable fractures detected with Group P. The tested novel endocrown system improved the biomechanical behavior of the tooth/ restoration complex in the restored endodontically treated maxillary first premolars. The tested novel endocrown system with a PEKK coping veneered with cemented IPS e.max CAD can be considered a promising option for restoration of severely-destructed endodontically treated premolar teeth. It can be considered as a conservative alternative option to the conventional treatment modalities.The tested novel endocrown system with a PEKK coping veneered with cemented IPS e.max CAD can be considered a promising option for restoration of severely-destructed endodontically treated premolar teeth. It can be considered as a conservative alternative option to the conventional treatment modalities. To describe prevalence of anterior tooth loss and its determinants among Chilean people aged over 15 years. Cross-sectional study, using the sampling frame of the Chilean National Health Survey 2016-2017 (n=5473 participants). Multivariate logistic regressions were performed to obtain the prevalence and odds ratio (OR) for anterior tooth loss using a complex sampling method. We described anterior tooth loss affecting each jaw according to sex, age, educational level, urban/rural residence and having health insurance. The odds of anterior tooth loss were 7.11 (95%CI 4.57 - 10.78) and 4.84 (95%CI 3.02 - 7.72) times higher for low-educated subjects compared to those with more educational, for the upper and lower jaw respectively. Also, the odds of anterior tooth loss for the upper jaw was 1.34 (CI 95% 1.07 - 1.66) times higher in women, whereas for the lower jaw, no significant differences by sex were found (p-value 0.14). Adults having only the National Health Fund B insurance (FONASA B) had odds of losing one or more anterior teeth 2.43 (CI 95% 1.34 - 4.39) times higher in the upper jaw and 2.08 (CI 95% 1.03 - 4.20) in the lower jaw compared with those having Health Insurance Institutions (ISAPREs). Our study showed for the first time that anterior tooth loss is a widespread condition in Chile, with marked inequities by sex, age, educational level, and geographical area. People in the public health insurance system have a higher odds of anterior tooth loss.Our study showed for the first time that anterior tooth loss is a widespread condition in Chile, with marked inequities by sex, age, educational level, and geographical area. People in the public health insurance system have a higher odds of anterior tooth loss. To assess the prevalence of temporomandibular disorder (TMD) in adolescents and estimate possible associations with poverty. A cross-sectional study nested within a prospective birth cohort study conducted in São Luís, Maranhão, Brazil. 2,412 adolescents aged 18-19 years. The presence of TMD, classified according to the Fonseca Anamnestic Index, was used as the outcome. The following explanatory variables were assessed gender, household head, paved/asphalted street, piped water, and socioeconomic background, based on the Brazilian Association of Market Research criteria and the poverty income ratio (PIR). Logistic regression analysis was performed with the estimation of odds ratios (OR) and 95% confidence intervals. TMD was common (51.4%) and was associated with poverty, as it was more frequent among adolescents from social classes D-E (OR=2.60; 95% CI 1.48-4.55) and C (OR=1.82; 95% CI 1.12-2.99) compared to A/B, and among poor adolescents using the PIR (OR=1.50; 95% CI 1.02-2.33). The prevalence of TMD in socioeconomically disadvantaged adolescents in São Luís is high, and these data allow the early identification of at-risk groups. We recommend carrying out other population-based studies, using diagnostic strategies with greater accuracy.The prevalence of TMD in socioeconomically disadvantaged adolescents in São Luís is high, and these data allow the early identification of at-risk groups. We recommend carrying out other population-based studies, using diagnostic strategies with greater accuracy.Color assessment remains a challenging aspect of esthetic dentistry. This study aimed to evaluate inter-operator agreement and accuracy in assessing shade parameters and to investigate the effect of different clinical backgrounds of the operators under different lighting conditions. Three veneers with a single shade (VITA VM7, shade 2M2 VITA Zahnfabrik, Bad Säckingen) and different shade characteristics (lustre, translucency and opacity) were assessed by 24 operators with different backgrounds using natural and color-corrected light (Trueshade, Interempresas Media, S.L.U. - Grupo Nova Àgora, Spain). Shade assessment accuracy was only 5.5% using natural light and 9.7% using Trueshade. The majority of operators identified value and hue correctly, although chroma was mostly identified incorrectly. The most accurate assessments were recorded by technicians, and translucency was the characteristic to be least accurately recorded. Inter-operator agreement of shade was better with Trueshade compared without Trueshade, although group agreements of shade characteristics were higher without Trueshade for lustre and opacity, but not for translucency. Operators showed limited agreement and poor accuracy in assessing shade and shade characteristics and the clinical background had an effect on shade selection. Technicians were more reliable in shade assessment. Trueshade could be a promising tool to improve shade assessment outcomes. To evaluate the effects of arch size and implant angulation on the accuracy of implant impressions. Four different resin models (small and large) of edentulous maxilla were fabricated and four implants were inserted (Blossom®, ø 4.75 × 10 mm) in each model. selleck chemicals llc Implants were either parallel or angled 25° buccally. Forty working casts (small parallel, small angled, large parallel, and large angled) were fabricated in dental stone (n=10). For each implant, linear and angular displacements were measured using a coordinate-measuring machine (CMM) and mean values were analyzed by univariate analysis (α = 0.05). Arch size did not affect the linear or angular displacement (P ⟩ .05). However, the implant angulation had a marked influence on the linear displacement (P ⟨ .05). The largest linear displacement occurred in implant no. 4 of angled small groups. Regardless of arch size, linear and angular accuracy of implant impression varied with the implant angulation.Regardless of arch size, linear and angular accuracy of implant impression varied with the implant angulation.