No abstract

ObjectiveTo assess and compare salivary periodontopathic bacteria between groups of Down syndrome and non-Down syndrome children and adolescents.Materials and MethodsThis study included a sample of 30 Down syndrome children and adolescents (G-DS) and 30 age- and sex-matched non-Down syndrome subjects (G-ND). Clinical examination determined the gingival bleeding index (GBI) and plaque index. Unstimulated whole saliva samples were collected from all participants. The fluorescence in situ hybridization (FISH) technique identified the presence and density of eight periodontopathic bacteria in saliva. The statistical analysis included chi-square and Mann-Whitney U tests.ResultsIn the G-DS group, bleeding on probing was more frequent (p = 0.037) and higher densities of Campylobacter rectus (p = 0.013), Porphyromonas gingivalis (p = 0.025), Treponema denticola (p = 0.026), Fusobacterium nucleatum (p = 0.013), Prevotella intermedia (p = 0.001) and Prevotella nigrescens (p = 0.008) were observed. Besides, in the G-DS, the densities of bacteria from the orange complex were significantly higher in the age group 3–7 years for F. nucleatum (p = 0.029), P. intermedia (p = 0.001) and P. nigrescens (p = 0.006). C. rectus was higher in the age group 8–12 years (p = 0.045).ConclusionThe results showed that children and adolescents with Down syndrome have higher susceptibility to periodontal disease and number of periodontopathic bacteria.

Streptococcus mutans and Streptococcus sobrinus are strongly associated with dental caries. However, the relationship between oral streptococci and dental caries in children with Down syndrome is not well characterized. Objective To assess and compare dental caries experience and salivary S. mutans, S. sobrinus, and streptococci counts between groups of Down syndrome and non-Down syndrome children and adolescents.Material and Methods This study included a sample of 30 Down syndrome children and adolescents (G-DS) and 30 age- and sex-matched non-Down syndrome subjects (G-ND). Dental caries experience was estimated by the number of decayed, missing, and filled teeth in the primary dentition and the permanent dentition. Unstimulated whole saliva samples were collected from all participants. The fluorescence in situ hybridization technique was used to identify the presence and counts of the bacteria. The statistical analysis included chi-square, Student’s t-test and Spearman’s correlation.Results The G-DS exhibited a significantly higher caries-free rate (p<0.001) and a lower S. mutans salivary density (p<0.001). No significant differences were found in the salivary densities of S. sobrinus or streptococci between the groups (p=0.09 and p=0.21, respectively). The salivary S. mutans or S. sobrinus densities were not associated with dental caries experience in neither group.Conclusion The reduced dental caries experience observed in this group of Down syndrome children and adolescents cannot be attributed to lower salivary S. mutans densities, as determined with the fluorescence in situ hybridization technique.

Background Previous studies have shown a high prevalence of malocclusion in people with Down syndrome (DS) compared to individuals without DS, but no systematic review to summarize the evidence on this topic has been performed thus far. Aim To evaluate whether children/adolescents with DS are more affected by malocclusion than those without DS. Design A search was performed in seven electronic databases. The quality of the included studies was assessed using the Newcastle‐Ottawa Scale. The strength of the evidence from the selected studies was evaluated by the Grading of Recommendations Assessment, Development and Evaluation system. Results Eleven publications were included in the systematic review and eight were meta‐analysed. The meta‐analysis showed that malocclusion was more prevalent in children/adolescents with DS for Angle Class III (risk difference [RD] = 0.40; confidence interval [CI] = 0.33, 0.46), posterior crossbite (risk ratio [RR] = 3.09; CI = 2.02, 4.73), anterior crossbite (RR = 2.18; CI = 1.41, 3.39), and anterior open bite (RD = 0.21; CI = 0.06, 0.36). Conclusion The occurrence of malocclusion was higher in children/adolescents with DS compared to individuals without the syndrome. The strength of the evidence of the studies analysed, however, was considered moderate and low.

Aims To assess the impact of oral conditions among children/adolescents with Down syndrome (DS) on the Oral Health‐related Quality of Life (OHRQoL) of their families in comparison with a group without DS. Methods and results Families of 144 children/adolescents with DS aged 4‐18 years were compared with families of individuals without DS. Dental caries experience (DMFT/dmft), clinical consequences of untreated dental caries (PUFA/pufa), gingival bleeding (GBI), visible plaque (VPI), and malocclusion were evaluated. Parents/caregivers answered the Family Impact Scale (FIS) and questionnaires on sociodemographic conditions and the health of children/adolescents. Data analysis included chi‐square test and Poisson regression. There was no difference between groups regarding the impact of the children's/adolescents' oral condition on their families’ OHRQoL for all domains and the total FIS score (P > 0.05). A negative impact on the OHRQoL of families of children/adolescents with DS was determined by dental caries (PR = 3.95, CI = 2.09‐7.46), clinical consequences of untreated dental caries (PR = 1.83, CI = 1.18‐2.84), defined malocclusion (PR = 2.75, CI = 1.23‐6.13), and severe malocclusion (PR = 2.82, CI = 1.02‐7.74). Conclusion There is no difference on the OHRQoL of families of children/adolescents with and without DS. Dental caries experience, clinical consequences of untreated dental caries, defined malocclusion, and severe malocclusion determined the negative impact on the OHRQoL of families of children/adolescents with DS.