The effect of conventional mechanical periodontal treatment on red complex microorganisms and clinical parameters in Down syndrome periodontitis patients: a pilot study

Periodontal disease (PD) is induced by a complex microbiota, such as Porphyromonas gingivalis, Tannerella forsythia, and Treponema denticola (together called the red complex), which triggers intense inflammatory reaction. Down syndrome (DS) individuals demonstrate a high prevalence of PD compared with those who are otherwise chromosomally normal (euploids). This pilot study aimed to evaluate the effect of non-surgical periodontal treatment in DS chronic periodontitis patients on clinical and microbiological parameters. Patients with chronic periodontitis, 23 DS and 12 euploids (control group), were submitted to non-surgical mechanical periodontal treatment, followed by maintenance for 45 days. Clinical parameters after periodontal treatment were similar in diseased and healthy sites, independent of the genetic background. Diseased sites of DS and control patients harbored similar levels of P. gingivalis and T. forsythia at baseline, but significantly higher levels of T. denticola were found in DS patients. Increased levels of P. gingivalis at healthy sites were found in DS individuals. Non-surgical periodontal therapy decreased the levels of red complex microorganisms and improved the tested clinical parameters of diseased sites in both groups. However, the levels of red complex bacteria were higher in diseased sites of DS patients after the periodontal treatment. We conclude in this pilot study that, although the mechanical periodontal treatment seemed to be effective in DS subjects over a short-term period, the red complex bacteria levels did not decrease significantly in diseased sites, as occurred in controls. Therefore, for DS patients, it seems that the conventional non-surgical periodontal therapy should be improved by utilizing adjuvants to reduce the presence of periodontopathogens.

Down-regulation of SLC8A1 as a putative apoptosis evasion mechanism by modulation of calcium levels in penile carcinoma

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Antioxidants and biomarkers of oxidative damage in the saliva of patients with Down's syndrome

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cardiac autonomic modulation of children with down syndrome

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Dental anomalies in patients with down syndrome

The purpose of the present study was to evaluate the incidence of dental anomalies in Brazilian patients with Down syndrome. A sample with 49 panoramic x-rays of syndromic patients aged 3 to 33 years (22 male and 27 female) was used. The characteristics of dental anomalies were observed in the panoramic radiographs in both the primary and permanent dentition, according to the ICD (International Classification of Diseases). The corresponding tables and percentile analysis were elaborated. There was a high incidence of syndromic patients with different types of anomalies, such as taurodontism (50%), proven anodontia (20.2%), suspected anodontia (10.7%), conic teeth (8.3%) and impacted teeth (5.9%). In conclusion, patients with Down syndrome presented a high incidence of dental anomalies and, in most cases, the same individual presented more than one dental anomaly.

Down-regulation of protease activated receptor 2, interleukin-17 and other pro-inflammatory genes by subantimicrobial doxycycline dose in a rat periodontitis model

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Condições de saúde bucal de crianças e adolescentes portadores de síndrome de Down

Patients with Down syndrome have shown different conditions of oral health, and there is a low occurrence of dental caries and a higher susceptibility to periodontal diseases. Thus, this study aimed to evaluate the prevalence of dental caries and periodontal diseases in subjects with Down syndrome. The population was composed of 40 patients with the syndrome, aged 6 to 18 years, of both genders, and an equal number of non-syndromic patients. The periodontal conditions were evaluated by mean of the criteria of PSR and dental conditions were registered following indexes dmft and DMFT. It was found that in children with Down syndrome, the dmft index was 1.17 and DMFT 3.53 while the control group was verified dmft 1.97 and DMFT 2.77. The results of PSR evidenced that 32.5% of children with Down syndrome were periodontally healthy, 65% were gingivitis patients and 2.5% were periodontitis patients, while in the control group, 50% healthy and 50% were gingivitis patients. The results evidenced similar populations of cariogenic cocci between patients with Down syndrome and non-syndromic subjects. It was concluded that the incidence of caries in children with Down syndrome was higher in permanent teeth compared with the control group, while in the occurrence of deciduous teeth caries was slightly higher in the control group, so when children with Down syndrome are subjected to periodic examinations, they present themselves periodontally healthy.

Odontological assistance to Down Syndrome patients having congenital heart malformations

In this study the authors present the frequency and types of congenital heart malformations (CHM) among Down Syndrome (DS) patients emphasizing the prevention of infectious endocarditis (IE) with appropriate antibiotic prophylaxis (ABP). Out of 390 DS patients, 312 (80%) were considered free from any CHM. 78 (20%) presented some CHM; from these 11,54% (n=9) have more than one CHM; ABP to prevent IE was recommended for 41,03% (n=32). Ventricular septal defect was the most frequent CHM (20,51%, n=16). Dentists must know about the patients’ cardiologic diagnosis before a treatment that could cause bleeding, because they have to administer antibiotics to prevent IE. Although some CHM doesn’t need ABP, according to the protocol of the American Heart Association, there are systemic conditions in DS that are relevant to the prescription of antibiotics.

Distribution of serotype-specific genotypes of Aggregatibacter actinomycetemcomitns in Brazilian patients with Down syndrome with different periodontal conditions

Fundação do Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Condições bucais de crianças e adolescentes portadores de síndrome de down

Os pacientes com síndrome de Down têm mostrado diferentes condições de saúde bucal, destacando-se uma baixa ocorrência de cárie e maior suscetibilidade às doenças periodontais. Assim, o presente estudo objetivou avaliar a prevalência de cárie, patologias periodontais e níveis de cocos cariogênicos em portadores de Síndrome de Down. A população foi constituída de 40 pacientes portadores da síndrome, com idade de 6 a 18 anos, de ambos os gêneros, e igual número de pacientes do grupo controle, os quais foram submetidos ao exame clínico periodontal segundo os critérios do PSR e para determinação do índice de cárie empregando-se os índices ceo-d e CPOD, e avaliação dos níveis de cocos cariogênicos através do real-time PCR. Verificou-se que nas crianças com síndrome de Down o índice médio ceo-d foi 1,17 e o CPO-D 3,53 enquanto que no grupo controle foi observado ceo-d 1,97 e o CPO-D 2,77. Verificou-se que 32,5% das crianças com síndrome de Down eram saudáveis, 65% com gengivite e 2,5% com periodontite e, no grupo controle, 50% foram saudáveis e 50% mostraram gengivite. Os resultados evidenciaram que a população de cocos cariogênicos foi similar entre pacientes portadores ou não de síndrome de Down. Concluiu-se que a ocorrência de cárie em crianças com síndrome de Down foi maior nos dentes permanentes comparadas com o grupo controle, enquanto que na dentição decídua a ocorrência de cárie foi maior no grupo controle, enquanto que as condições periodontais foram semelhantes entre os dois grupos.

Aggregatibacter actinomycetemcomitans em pacientes com síndrome de down: influência da condição periodontal e higiene bucal

Patients with Down syndrome have varying degrees of mental retardation, physical and motor, and apparently are more susceptible to infectious diseases. Thus, the present study aimed to evaluate the occurrence of Aggregatibacter actinomycetemcomitans in saliva and subgingival biofilms and above of children and adolescents with Down syndrome and analyze the influence of diet, socioeconomic and cultural factors and periodontal condition. After assessing the socio-economic and behavioral, were collected clinical specimens, which were transported to the laboratory of Microbiology and Immunology FOA-UNESP for detection of microorganisms by molecular method and periodontal conditions were evaluated according to the Periodontal Screening Index and Recording. The control group consisted of individuals without the syndrome. The results were analyzed by chi-square test for proportion analysis of variables with three or more categories, or the Mann-Whitney test. The data analysis of this study showed that the occurrence of A. actinomycetemcomitans ranged from 0.0% to 25.0%, both in the group of patients with Down syndrome, as for the control group and this was not affected by socioeconomic characteristics of the target population, either by oral hygiene standards

Intervenção em habilidades sociais com uma criança com síndrome de Down

Studies show that children with Down’s syndrome have deficits in social skills, which can interfere in their social interactions and also in their academic performance. The aim of this study was to analyze the clinical significance and reliable change in repertory of social skills of a child with Down’s syndrome, from interventions in the clinic, at home and at school. A seven year old girl with Down’s Syndrome who had frequented the first year of regular school, her parents and her teacher participated in this study. They were attending in a Center of Applied Psychology, of a public university in São Paulo State. Before and after the intervention parents and teacher answered the Rating System Social Skills (SSRS). The intervention with the child had been conducted for six months, through playful activities in weekly meetings. It was discussed various topics related to social skills with parents and teacher in biweekly and monthly meetings. The results were analyzed using JT method. With parents, comparing the two assessments conducted, the data pointed to positive change reliable for four of the six skills assessed. Of the five skills assessed by the teacher, one of them was not in the clinical level since the first application. The other two went from clinical to non-clinical level, featuring reliable positive change. The study showed the importance of pre and post measures in case study, enabling the assessment of the effects of the intervention performed on the various factors of social skills. Further studies with larger populations may ratify the data obtained.

Saúde bucal e qualidade de vida em indivíduos com paralisia cerebral e Síndrome de Down: percepção dos cuidadores

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Spatial modelling and prediction on river networks: up model, down model or hybrid?

Preservation of rivers and water resources is crucial in most environmental policies and many efforts are made to assess water quality. Environmental monitoring of large river networks are based on measurement stations. Compared to the total length of river networks, their number is often limited and there is a need to extend environmental variables that are measured locally to the whole river network. The objective of this paper is to propose several relevant geostatistical models for river modeling. These models use river distance and are based on two contrasting assumptions about dependency along a river network. Inference using maximum likelihood, model selection criterion and prediction by kriging are then developed. We illustrate our approach on two variables that differ by their distributional and spatial characteristics: summer water temperature and nitrate concentration. The data come from 141 to 187 monitoring stations in a network on a large river located in the Northeast of France that is more than 5000 km long and includes Meuse and Moselle basins. We first evaluated different spatial models and then gave prediction maps and error variance maps for the whole stream network.