RESUMEN
OBJECTIVE: The aim was to evaluate the relationship between orofacial function, dentofacial morphology, and bite force in young subjects. SUBJECTS AND METHODS: Three hundred and sixteen subjects were divided according to dentition stage (early, intermediate, and late mixed and permanent dentition). Orofacial function was screened using the Nordic Orofacial Test-Screening (NOT-S). Orthodontic treatment need, bite force, lateral and frontal craniofacial dimensions and presence of sleep bruxism were also assessed. The results were submitted to descriptive statistics, normality and correlation tests, analysis of variance, and multiple linear regression to test the relationship between NOT-S scores and the studied independent variables. RESULTS: The variance of NOT-S scores between groups was not significant. The evaluation of the variables that significantly contributed to NOT-S scores variation showed that age and presence of bruxism related to higher NOT-S total scores, while the increase in overbite measurement and presence of closed lip posture related to lower scores. Bite force did not show a significant relationship with scores of orofacial dysfunction. No significant correlations between craniofacial dimensions and NOT-S scores were observed. CONCLUSION: Age and sleep bruxism were related to higher NOT-S scores, while the increase in overbite measurement and closed lip posture contributed to lower scores of orofacial dysfunction.
Asunto(s)
Fuerza de la Mordida , Dentición , Sobremordida/fisiopatología , Bruxismo del Sueño/fisiopatología , Adolescente , Factores de Edad , Cefalometría , Niño , Deglución , Femenino , Humanos , Labio/fisiopatología , Masculino , Masticación , Postura , HablaRESUMEN
Concentrations of Dechlorane (Dec) 603 (0.75 ng/g lipid weight (lw); mean) and Dec 602 (0.38 ng/g lw; mean) were quantified in more than 95% of the franciscana (Pontoporia blainvillei) dolphin samples, whereas the frequency of detection decreased to 75% for Dechlorane Plus (DP) (1.53 ng/g lw, mean). The presence of Chlordene Plus (CP) was also observed (0.13 ng/g lw, mean) in half of the samples. On the contrary, Dec 604, decachloropentacyclooctadecadiene (aCl(10)DP), and undecachloropentacyclooctadecadiene (aCl(11)DP) concentrations were below the limit of quantifications in all cases. To the best of our knowledge, this is the first article reporting the presence of Dec 603, Dec 602, and CP in mammals. For comparative purposes, levels of Mirex, polybrominated diphenyl ethers (PBDEs), and decabromodiphenylethane (DBDPE) are also reported. Considering geographic distribution evaluation together with the strong positive correlations found between DP and PBDEs (r(s) = 0.63; p < 0.01), highly anthropogenic areas were identified as potential sources of these chemicals in this dolphin species. However, local sources for Dec 602, 603, Mirex, CP, and DBDPE were not found indicating that in this case historical use and/or atmospheric transport and deposition may play an important role in their fate.
Asunto(s)
Bromobencenos/metabolismo , Exposición a Riesgos Ambientales , Retardadores de Llama/metabolismo , Éteres Difenilos Halogenados/metabolismo , Hidrocarburos Clorados/metabolismo , Contaminantes Químicos del Agua/metabolismo , Factores de Edad , Animales , Brasil , Cromatografía de Gases , Monitoreo del Ambiente , Geografía , Espectrometría de Masas , Factores SexualesRESUMEN
AIM: The association between bone quality and fracture risk in the mandibular angle with the presence of impacted/semi-impacted third molars and after their extraction is controversial. This study aimed to assess mandibular bone quality in digital radiographies of patients after extraction of impacted/semi-impacted lower third molars. METHODS: A total of 130 sets of digital panoramic radiographies were selected and divided into the following three groups: Group 1 with 50 panoramic radiographies of patients with impacted/semi-impacted lower third molars, Group 2 with 30 panoramic radiographies of patients with lower third molar agenesis, and Group 3 with 50 panoramic radiographies of patients after extraction of impacted/semi-impacted lower third molars. The mandibular angular cortex was the anatomical structure used as parameter for bone quality assessment. ANOVA and Student's t test were applied for comparison between groups. RESULTS: Mandibular angular cortical width was significantly lower when the third molar was present in both genders (P<0.05). Agenesis of the third molar in women was associated with lower thickness of the mandibular cortex when compared with patients who had their third molar extracted (P<0.05). CONCLUSION: It can be concluded that the absence of impacted/semi-impacted lower third molars, was associated with a significant increase in cortical width.