Effects of Self-ligating Orthodontic Appliances on the Periodontal Health of Adolescents: A Prospective Cohort Study.

PURPOSE: To evaluate the association between orthodontic treatment with fixed appliances and periodontal health during treatment by examining gingival inflammation indices and saliva properties. MATERIALS AND METHODS: Thirty consecutive orthodontic patients, aged 11-18 years old, who were eligible for fixed orthodontic appliances, were included in the study. Plaque index (PI), gingival index (GI), salivary pH and flow rate were recorded at three timepoints: immediately before placement of orthodontic fixed appliances (T0), and 1 (T1) and 3 months (T2) after bonding. RESULTS: The hypothesis that PI would remain constant across timepoints was rejected. PI increased over time (0 to 1 scale, T1-T0: mean diff. = 0.10, 95% CI = 0.03, 0.18, p = 0.01; T2-T0: mean diff. = 0.16, 95% CI = 0.08, 0.24, p < 0.001). On the other hand, GI changed statistically significantly over time (p = 0.05). Patients' age was not a predictor for PI change (p = 0.93), but it was for GI (p = 0.01). As anticipated, average PI was found to be higher for the mandibular dentition by 0.10 (95% CI = 0.04, 0.16) and the labial surfaces of teeth of both jaws by 0.51 (95% CI = 0.45, 0.57). CONCLUSIONS: Within the framework of the current study, orthodontic treatment appeared to affect the periodontal health of patients, but the changes were clinically negligible and not consistently statistically significant.

A Prospective Cohort Study Assessing the Impact of Fixed Orthodontic Appliances on Saliva Properties and Oral Microbial Flora.

PURPOSE: Orthodontic treatment may introduce a risk to the integrity of enamel due to plaque accumulation and colonisation by oral microbes. This prospective cohort study observed the effect of fixed, self-ligating orthodontic appliances on saliva properties and oral microbial flora. Materials and Methods: Thirty adolescent patients were recruited (13 female, 17 male, mean age 13.97 ±â€¯2.07 years). Saliva samples were collected before placement of fixed orthodontic appliances (T0), and 4 (T1) and 12 (T2) weeks later. Salivary pH, flow rate and buffering capacity were recorded. All saliva samples were cultured on agar plates for 2 days. Salivary prevalence of Neisseria spp., streptococci, Staphylococcus aureus, coagulase-negative staphylococci and Candida albicans were assessed. Results: High buffering capacity was reported in 21 patients at T0, 22 patients at T1 and in 28 patients at T2. Saliva flow rate also increased over time (7.08 ml/5 min at T0, 7.93 ml/5 min at T1 and 8.35 ml/5min at T2). Mean pH was 7.63 at T0, 7.67 at T1 and 7.78 at T2. There was no evidence that either pH or the number of colonies of any of the microbial species changed over time. Conclusion: The increased buffering capacity of saliva as well as the salivary flow rate after initial bonding might be protective against the development of dental caries. Current microbial findings indicate that initiation of orthodontic treatment may not be associated with significant changes in oral microbial flora.

Effect of fluoride varnish with functionalized tri-calcium phosphate on post-orthodontic white spot lesions: an investigator-blinded controlled trial.

OBJECTIVE: To investigate the effect of a 5% sodium fluoride varnish with functionalized tri-calcium phosphate (fTCP) on post-orthodontic white spot lesions. A secondary aim was to study if the patients and their clinicians perceived clinical improvements. METHOD AND MATERIALS: Fifty-nine patients with at least two visible WSLs on their maxillary incisors, canines, or first premolars present at the debonding of fixed appliances (baseline) were enrolled and assigned to a Varnish group (Clinpro White Varnish, 3M Espe) receiving topical applications at baseline and after 8 weeks, or a Control group treated with a fluoride-free mock product. The primary endpoint was white spot lesion appearance after 16 weeks, assessed from photographs using the modified ICDAS white spot lesion score (0 to 3). The patients and the dental examiners rated the white spot lesions subjectively with aid of a visual analog scale. RESULTS: Fifty-seven patients completed the study. After 16 weeks, 62% of the white spot lesions in the Varnish group were completely reversed (score 0) compared to 39% in the Control group. The treatment effect was statistically significant (OR 0.22; 95% CI 0.08 to 0.59, P = .003) after adjusting for baseline oral hygiene index and type of tooth. A significant correlation (P < .05) was observed between patients' and orthodontists' perception of the lesions. CONCLUSION: The 5% sodium fluoride varnish with fTCP appeared clinically effective in reversing post-orthodontic white spot lesions 16 weeks after debonding. The patients and the clinicians agreed on the obtained esthetic improvements.

Is Bleaching Effective in Managing Post-orthodontic White-spot Lesions? A Systematic Review.

PURPOSE: White spot lesions (WSL) are common side-effects of orthodontic treatment with fixed multi-bracketed appliances. The aim of this review was to find all available literature and critically assess the evidence for the efficacy of bleaching as a method to treat or alleviate post-orthodontic WSLs in permanent teeth. MATERIALS AND METHODS: Electronic databases were screened for relevant literature with the aid of predetermined search strategies. All types of studies, including randomised or nonrandomised controlled trials (RCTs or CCTs), prospective and retrospective studies, as well as in vitro studies were considered eligible for inclusion. The reference lists of all included articles were hand searched for additional studies. Two authors independently performed study selection, data extraction, and risk of bias assessment. RESULTS: One RCT and 8 in vitro studies met the inclusion criteria. Seven studies were classified as having a high risk of bias while 2 in vitro studies were graded as having a moderate risk of bias. The results showed that bleaching of WSL can diminish colour disparities between carious and non-affected areas, but the certainty of the evidence was very low. The high degree of methodological heterogeneity precluded a valid interpretation of the results through pooled estimates. CONCLUSIONS: The findings from the present systematic review could not support or refute bleaching as an effective method for management of post-orthodontic WSLs. Because most of the studies in this field are in vitro and solid scientific evidence of low risk of bias is scare, further prospective in vivo studies are necessary.

Social media and orthodontic treatment from the patient's perspective: a systematic review.

BACKGROUND: Social media are one of the most common and easily accessible ways of gaining information about orthodontic treatment. OBJECTIVE: The main objective of this study was to systematically search the literature and determine the various aspects of the interrelationship between social media and orthodontics from the patient's perspective. SEARCH METHODS: Electronic database searches of published and unpublished literature were performed. The reference lists of all eligible articles were hand-searched for additional studies. SELECTION CRITERIA: Randomized clinical trials (RCTs), prospective, retrospective, and cross-sectional studies were included. DATA COLLECTION AND ANALYSIS: Study selection, data extraction, and risk of bias assessment were performed individually and in duplicate by the first two authors. RESULTS: One RCT, three retrospective, and four cross-sectional studies were deemed as eligible for inclusion in this review. The studies included patient's statements in social media or results from questionnaires given to patients. The social media reported were with order of frequency: Twitter, YouTube, Facebook, Google+, Pinterest, and Instagram. The feelings the patients expressed seemed to be more positive than negative: enthusiasm, self-esteem and pleasure, excitement about the aesthetic result, excitement after braces removal but also antipathy, annoyances, reduced self-esteem, and impatience for removing mechanisms. In addition, one study referred to bullying through Twitter. LIMITATIONS: The high amount of heterogeneity precluded a valid interpretation of the results through pooled estimates. CONCLUSIONS AND IMPLICATIONS: This systematic review demonstrated that information about orthodontics, how the patient feels, and other psychosocial facets are spread through social media. It is intuitive that research relating to the effects and impact of orthodontic interventions should account not only for the physical impacts of treatment but also to encompass patient-centered outcomes. REGISTRATION: The protocol of this study was not registered in publicly assessable database. CONFLICTS OF INTEREST: None to declare.

Clinical effectiveness of Invisalign® orthodontic treatment: a systematic review.

BACKGROUND: Aim was to systematically search the literature and assess the available evidence regarding the clinical effectiveness of the Invisalign® system. METHODS: Electronic database searches of published and unpublished literature were performed. The reference lists of all eligible articles were examined for additional studies. Reporting of this review was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. RESULTS: Three RCTs, 8 prospective, and 11 retrospective studies were included. In general, the level of evidence was moderate and the risk of bias ranged from low to high, given the low risk of bias in included RCTs and the moderate (n = 13) or high (n = 6) risk of the other studies. The lack of standardized protocols and the high amount of clinical and methodological heterogeneity across the studies precluded a valid interpretation of the actual results through pooled estimates. However, there was substantial consistency among studies that the Invisalign® system is a viable alternative to conventional orthodontic therapy in the correction of mild to moderate malocclusions in non-growing patients that do not require extraction. Moreover, Invisalign® aligners can predictably level, tip, and derotate teeth (except for cuspids and premolars). On the other hand, limited efficacy was identified in arch expansion through bodily tooth movement, extraction space closure, corrections of occlusal contacts, and larger antero-posterior and vertical discrepancies. CONCLUSIONS: Although this review included a considerable number of studies, no clear clinical recommendations can be made, based on solid scientific evidence, apart from non-extraction treatment of mild to moderate malocclusions in non-growing patients. Results should be interpreted with caution due to the high heterogeneity.

Salivary levels of cariogenic bacterial species during orthodontic treatment with thermoplastic aligners or fixed appliances: a prospective cohort study.

BACKGROUND: Fixed orthodontic appliances might be associated with intraoral adverse effects on enamel, due to plaque accumulation and their colonization by oral microbes. At the same time, the demand for esthetic alternatives to orthodontic treatment, like thermoplastic aligners, is growing. However, thermoplastic aligners may behave differently intraorally than fixed appliances in terms of bacterial colonization and biofilm formation. Therefore, the aim of this prospective cohort study was to assess the salivary prevalence of the cariogenic bacteria Streptococcus mutans, Lactobacillus acidophilus, and Streptococcus sanguinis among adolescents treated orthodontically with thermoplastic aligners or fixed appliances. METHODS: Thirty adolescent patients (17 girls/13 boys; mean age 13.8 years old) were assigned to treatment with either (i) self-ligating fixed appliances with nickel-titanium archwires or (ii) aligners constructed from clear transparent polyethylenterephthalat-glycol copolyester (PET-G) thermoplastic sheets. Whole stimulated saliva was collected from each patient at three time points: at baseline (before bonding and initiation of orthodontic therapy or before insertion of the thermoplastic aligners), after 2 weeks, and after 1 month. A simplified plaque index, a simplified gingival index, and the decayed, missing, and filled teeth (DMFT) index were assessed from the clinical examination of the patients. Microbiological analysis of salivary bacteria was performed by quantitative polymerase chain reaction, followed by descriptive and inferential statistics at the 5% level. RESULTS: Although patients treated with aligners had significantly lower plaque and gingivitis scores throughout treatment compared to patients treated with fixed appliances, no significant difference could be found between the S. mutans counts of the two groups at any time through treatment (P > 0.05). On the other hand, patients treated with aligners had significantly lower salivary S. sanguinis counts at all time points than patients treated with fixed appliances (P < 0.05). Finally, almost no L. acidophilus were identified in the collected saliva samples in either of the treated samples. CONCLUSIONS: Within the limitations of this study, there were no differences in the salivary counts of S. mutans or L. acidophilus among adolescent patients treated for 1 month with thermoplastic aligners or self-ligating appliances. On the other hand, patients treated with aligners had lower salivary levels of S. sanguinis compared to those treated with self-ligating appliances.

Platelet Mass Predicts Intracranial Hemorrhage in Neonates With Gram-negative Sepsis.

Neonatal sepsis due to gram-negative bacteria is associated with severe hemorrhagic conditions, such as intracranial hemorrhage (ICH). The aim of the study was to investigate the significance of platelet (PLT) count and platelet mass (PM) in predicting promptly neonatal ICH. Demographics, species, PLT, PM, ICH, and outcome for neonates with gram-negative sepsis for the period 2005 to 2012 were retrospectively recorded. Eighty-four infants were enrolled with median gestational age 30 weeks, median birthweight 1481.5 g, and median age at sepsis diagnosis 23 days. The most frequently isolated bacteria were Enterobacter spp. (38.1%). ICH occurred in 16 neonates (19%), whereas the mortality rate was 25% (21 neonates). The median PLT count and PM at days 1, 2, and 3 after diagnosis of gram-negative sepsis was significantly associated with the presence of ICH. Regression analysis revealed the cutoff predictive value of 355 fL/nL for the PM at day 3 (area under the curve: 75, sensitivity 90%, P=0.002). PM levels could play an important role in predicting the occurrence of ICH in high-risk neonates.