Dor e fatores associados em pacientes atendidos em um serviço de urgência odontológica no sul do Brasil / Pain and associated factors in patients attending an emergency dental service in southern Brazil

O objetivo deste estudo transversal foi avaliaro desfecho dor e fatores associados em pacientes atendidos em um serviço de urgência odontológica no sul do Brasil. Foram avaliados 137 prontuários provenientes de um projeto de extensão para capacitação em atendimento odontológico de urgência da Universidade Federal de Santa Maria (Santa Maria/RS), referentes ao período de abril de 2017 a dezembro de 2018. Os dados contidos na ficha clínica, autorrelatados pelos pacientes, foram coletados e variáveis relacionadas às características socioeconômicas, médicas e odontológicas foram submetidas à análise estatística descritiva e regressão de Poisson multivariada. A prevalência de dor nestes pacientes foi de 65,2%e a hipótese diagnósticamais prevalente foi de pulpite aguda irreversível (46,2% dos casos). A procura por atendimento foi maiorna faixa etária entre 40-59 anos (48,6%), no sexo feminino (64%), em pacientes sem nível superior (85,3%) e os dentes mais frequentemente tratados foram os posteriores (82,7%). Houve associação entre a presença de dor e variáveis médicas, sendo queos pacientes com mais de duas doençassistêmicas apresentaram maior prevalência de dor. O preenchimento inadequado dos prontuários odontológicos foi um achado comum, o que pode prejudicar o estabelecimento do perfil epidemiológico destes pacientes e o planejamento dos atendimentos futuros de forma eficiente, além de poder acarretar problemas jurídicos (AU).

This cross-sectional study aimed to evaluate the pain outcome and associated factorsin patients attending an emergency dental service in southern Brazil. One hundred and thirty-seven (137) patient records from an extension project for emergency dental care training at the Universidade Federal de Santa Maria (Santa Maria, RS, Brazil), relative to the period from April 2017 to December 2018, were evaluated. The data in the records, self-reported by the patients, were collected, and variables related to socioeconomic, medical and dental characteristics were subjected to descriptive statistical analysis and multivariate Poisson regression. The prevalence of pain in these patients was 65.2%, and the most prevalent diagnostic hypothesis was irreversible acute pulpitis (46.2% of the cases). The demand for care was greater in the age group between40-59 years (48.6%), in women (64%), in patients without university education (85.3%), and posterior teeth were the most frequently treated (82.7%). There was an association between the presence of pain and medical variables, being that patients with morethan two systemic diseases had a higher prevalence of pain. The inadequate completion of dental records was a common finding, which can impair the establishment of the epidemiological profile of these patients and the efficient planning of future dental care services, as well as cause legal problems (AU).

High load frequency at 20Hz: Its effects on the fatigue behavior of a leucite-reinforced glass-ceramic.

Considering the long time spent in low frequency cyclic fatigue tests, this study aimed to evaluate the influence of loading frequency (2 Hz and 20 Hz) on the flexural fatigue strength (FFS) and on the time and number of cycles to failure of a leucite-reinforced glass-ceramic. Disc-shaped specimens were produced using leucite-reinforced glass-ceramic CAD/CAM blocks (IPS Empress CAD), according to ISO 6872/2015. Two fatigue tests were performed. The FFS (n = 17) was determined by staircase approach at a lifetime of 500,000 cycles, for 2 Hz (control - chewing frequency estimative) and 20 Hz (accelerated approach). To determine the time and the number of cycles to failure in flexural fatigue, discs (n = 20) were submitted to a cyclic loading ranging from 10 MPa to 99 MPa (60% of the monotonic strength), until a maximum of 500,000 cycles. Means, standard deviation and confidence intervals (CI) at 95% for FFS were calculated, whereas statistical differences were detected based on maximum likelihood estimations and overlapping of 95% CIs. Kaplan Meier (α = 0.05) and log rank post-hoc tests were used to analyze the time (in minutes) and the number of cycles to failure in the lifetime test. FFS did not differ significantly between 2 Hz (mean: 78 MPa; 95% CI: 69-88 MPa) and 20 Hz (mean: 84 MPa; 95% CI: 78-90 MPa). Regarding the lifetime test, there was no difference (p = 0.3) in the time to failure for 2 Hz (mean: 13 min; 95% CI: 6-20 min) and 20 Hz (mean: 69 min; 95% CI: 9-128 min). However, the group tested with 20 Hz survived a significantly (p < 0.01) higher number of cycles (mean: 82,247 cycles; 95% CI: 11,450-153,044) than the group tested with 2 Hz (mean: 1588 cycles; 95% CI: 779-2397). Therefore, in leucite-reinforced glass-ceramic fatigue strength tests, limited to a lifetime of 500,000 cycles, the use of loading frequencies up to 20 Hz did not influence the FFS estimations when compared to 2 Hz (chewing frequency estimative), and may be an alternative to accelerate data collection in this type of mechanical test. However, in lifetime tests, the use of higher loading frequencies, as 20 Hz, did not save time, since a higher number of cycles was necessary to promote the failure, when compared to 2 Hz.