scholarly journals Biofilm formation following chitosan-based varnish or chlorhexidine-fluoride varnish application in patients undergoing fixed orthodontic treatment: a double blinded randomised controlled trial

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Preethi Poornima ◽  
Jogikalmat Krithikadatta ◽  
Ratna Rachel Ponraj ◽  
Natanasabapathy Velmurugan ◽  
Anil Kishen
Keyword(s):  
Biofilm Formation ◽  
Orthodontic Treatment ◽  
Controlled Trial ◽  
Bacterial Count ◽  
Fluoride Varnish ◽  
White Spot Lesion ◽  
Female Ratio ◽  
Orthodontic Therapy ◽  
Increased Risk ◽  
Plaque Ph

Abstract Background Orthodontic treatment poses an increased risk of plaque accumulation and demineralisation of enamel leading to white spot lesion around the brackets. This parallel arm trial aims to assess the degree of bacterial plaque formation adjacent to orthodontic brackets, following the application of a chitosan-based varnish or chlorhexidene-fluoride varnish. Methods A total of 200 teeth from 20 patients undergoing fixed orthodontic therapy were assessed and biofilm formation around the brackets were recorded using the Bonded Bracket Index (Plaque index) at baseline and weekly for 6 weeks. The bacterial count and plaque pH at corresponding weekly intervals were also recorded. Following bracket bonding, the patients were cluster randomised to receive chitosan-based varnish-CHS (UNO Gel Bioschell, Germiphene corp., Brantford, Canada) or chlorhexidine-fluoride varnish-CFV (Cervitec F, Ivoclar Vivadent, Schaan, Liechtenstein) every week on the representative teeth respectively. BBI proportions were compared between groups at all time intervals using Chi square test. Mean plaque bacterial count and plaque pH were compared using Mann Whitney U test and Tukey’s HSD test respectively. Results Baseline characteristics were similar between the groups: Mean age was CHS = 23 and CFV = 21; male to female ratio was CHS = 5/5, CFV = 7/3. At the end of 6 weeks, chitosan-based varnish performed equal to chlorhexidine-fluoride varnish (P > 0.05) with 98% and 95% of teeth with acceptable scores respectively. The plaque bacterial count significantly reduced at 6 weeks for both varnish compared to the baseline; The value for CHS was 0.43 ± 0.4 × 104 and CFV was 0.77 ± 0.64 × 104 CFU (P < 0.05), with no difference between both the varnishes. Both varnishes had no effect on the plaque pH that remained neutral. Conclusion This trial showed that both chitosan-based varnish and chlorhexidine-fluoride varnish reduced bacterial count, while the plaque pH remained neutral over a period of six weeks in patients undergoing fixed orthodontic therapy. The anti-plaque effects of the natural biopolymeric chitosan-based varnish was similar to that of chlorhexidine-fluoride varnish, a known chemotherapeutic agent. Registration: This trial protocol was registered with https://www.ctri.nic.in (CTRI/2019/05/018896). (Date of registration 02/05/2019). Protocol: The protocol was not published before trial commencement.

Fluoride varnish for white spot lesion prevention during orthodontic treatment: results of a randomized controlled trial 1 year after debonding

2020 ◽  
Author(s):  
Mikael Sonesson ◽  
Anna Brechter ◽  
Rolf Lindman ◽  
Salem Abdulraheem ◽  
Svante Twetman
Keyword(s):  
Randomized Controlled Trial ◽  
Placebo Group ◽  
Orthodontic Treatment ◽  
Controlled Trial ◽  
White Spot ◽  
Fluoride Varnish ◽  
White Spot Lesion ◽  
Randomized Controlled

Summary Background Topical fluorides are commonly recommended to prevent the development of white spot lesion (WSL) during treatment with fixed orthodontic appliances (FOAs), but the certainty of evidence is low, and long-term effects of fluoride preventive methods to reduce lesions seem to be rare. Objective To evaluate the long-term effectiveness of professional applications of a fluoride varnish containing 1.5% ammonium fluoride in preventing WSL development in adolescents undergoing multi-bracket orthodontic treatment. Subjects and methods We performed a randomized controlled trial in which 166 healthy adolescents (12–18 years) from three different clinics were enrolled and randomly allocated to a test or a placebo group. The randomization was performed by a computer program, generating sequence numbers in blocks of 15. The fluoride varnish or the non-fluoride placebo varnish was applied in a thin layer around the bracket base every sixth week during the course of the orthodontic treatment (mean duration 1.7 years). We scored the prevalence of WSL on the labial surfaces of the maxillary incisors, canines and premolars immediately after debonding (baseline) and approximately 1 year after debonding, from digital photos with aid of a four-step score. The examiners were not involved in the treatment of the patients and blinded for the group assignment. Results One hundred and forty-eight patients were available at debonding and 142 of them could be re-examined after 1 year (71 in the test and 71 in the placebo group). The 1-year attrition rate was 4.0%. On patient level, the prevalence of post-orthodontic WSLs (score ≥ 2) dropped by over 50% during the follow-up with no significant difference between the groups. On surface level, there were significantly fewer remaining WSLs in the test group compared with the placebo group (4.5% versus 10.4%; relative risk 0.44, 95% confidence interval 0.28–0.68). Limitations The compliance with fluoride toothpaste was not checked, and the patients’ general dentists may have instigated additional risk-based preventive measures. No cost–benefit analysis was carried out. Conclusions This follow-up study displayed a small beneficial long-term effect of fluoride varnish in reducing WSL development during treatment with FOA. Registration NCT03725020. Protocol The protocol was not published before trial commencement.

A comparative assessment of orthodontic treatment outcomes using the quantitative light-induced fluorescence (QLF) method between direct bonding and indirect bonding techniques in adolescents: a single-centre, single-blind randomized controlled trial

2019 ◽  
Vol 42 (4) ◽  
pp. 441-453
Author(s):  
Aykan Onur Atilla ◽  
Taner Ozturk ◽  
Mustafa Murat Eruz ◽  
Ahmet Yagci
Keyword(s):  
Orthodontic Treatment ◽  
Small Sample Size ◽  
Controlled Trial ◽  
Small Sample ◽  
White Spot Lesion ◽  
Indirect Bonding ◽  
Signed Rank ◽  
Group 12 ◽  
Registration Number ◽  
Bonding Technique

Summary Introduction The aim of this two-arm parallel trial was to evaluate enamel demineralization in fixed orthodontic treatment using an indirect bonding technique in comparison to a direct bonding technique by the quantitative light-induced fluorescence (QLF) method. Design, settings and participants Fifty-six patients who needed fixed orthodontic treatment were randomly separated into either the direct bonding group or the indirect bonding group. The presence and extent of lesions on the buccal surfaces of all teeth, except the molar teeth, were assessed. The percentage of fluorescence loss (ΔF and ΔFmax), the degree of demineralization (ΔQ) and lesion area (WS area) were determined using the system’s software. The data were analysed with the Wilcoxon signed-rank and Mann–Whitney U-tests (P &lt; 0.05). Interventions Treatment with a direct bonding or an indirect bonding technique. Results This study was completed with 25 patients in the indirect bonding group (12 females, 13 males; mean age: 15.42 ± 1.71 years) and 26 patients in the direct bonding group (12 females, 14 males; mean age: 14.73 ± 1.65 years). In the indirect bonding technique, a few teeth (especially mandibular left canine: 50.45 ± 93.48; 95% confidence interval: −12.35 and 113.26) were found to develop significant white spot lesion (WSL) formation (P &lt; 0.05). However, the number of teeth with demineralization was higher in the direct bonding group (P &lt; 0.05). Conclusion The bonding procedures used in the indirect bonding technique contribute to reducing the degree of WSL formation. Further, the use of flowable composite adhesives in this bonding process is more effective at reducing the appearance of WSLs than in cases where conventional composite adhesives are used. Limitations The limitation of our trial may be the small sample size and the short follow-up time for the patients. Harms No harms were detected during the study. Protocol The protocol was not published before trial commencement. Registration This trial was registered post hoc at ‘Clinical Trials’ (http://www.clinicaltrials.gov), registration number (ID): NCT03738839.

scholarly journals Pulp Vitality in Teeth Suffering Trauma during Orthodontic Therapy

2009 ◽  
Vol 79 (1) ◽  
pp. 166-171 ◽  
Author(s):  
Oskar Bauss ◽  
Johannes Röhling ◽  
Karen Meyer ◽  
Stavros Kiliaridis
Keyword(s):  
Orthodontic Treatment ◽  
Dental Trauma ◽  
Orthodontic Therapy ◽  
Increased Risk ◽  
Fixed Appliances ◽  
Pulp Vitality ◽  
Pulp Obliteration

Abstract Objective: To examine pulpal vitality in teeth suffering dental trauma during orthodontic therapy with fixed appliances. Materials and Methods: Pulpal condition was evaluated in 59 teeth that had suffered dental trauma during orthodontic treatment (TO-group), in 800 orthodontically treated teeth without previous dental trauma (O-group), and in 193 orthodontically untreated teeth with previous dental trauma (T-group). Pulpal vitality was examined clinically and with radiographs. Degree of pulp obliteration was rated as absent, partial, or total. All teeth in the TO-group showed a positive sensibility test prior to resumption of orthodontic therapy. Results: Teeth in the TO-group revealed a significantly higher frequency of pulp necrosis than teeth in the O-group or teeth in the T-group (P &lt; .001, respectively). In the TO-group, teeth with extrusive or lateral luxation (P = .031) and teeth with intrusive luxation (P = .015) injuries showed a significantly higher rate of pulp necrosis than teeth with fracture of enamel. In addition, teeth with total pulp obliteration showed a significantly higher frequency of pulp necrosis than teeth without pulp obliteration (P = .013). Conclusion: Teeth with severe periodontal injury during orthodontic therapy and subsequent total pulp obliteration have an increased risk of pulp necrosis during additional orthodontic treatment stages.

scholarly journals Quantitative Analysis of Biofilm Formation On Labial and Lingual Bracket Surfaces

2019 ◽  
Vol 90 (1) ◽  
pp. 100-108
Author(s):  
Sila Bilgin Yener ◽  
Ömür Polat Özsoy
Keyword(s):  
Quantitative Analysis ◽  
Surface Analysis ◽  
Biofilm Formation ◽  
Orthodontic Treatment ◽  
Detection Method ◽  
Rutherford Backscattering ◽  
Orthodontic Brackets ◽  
Analysis Software ◽  
Orthodontic Therapy ◽  
Lingual Brackets

ABSTRACT Objectives To evaluate and compare the biofilm formation between labial and lingual orthodontic brackets. Materials and Methods Twenty patients with a mean age of 24 ± 8.8 who had received labial or lingual orthodontic treatment were enrolled in the study. Biofilm formation on 80 brackets was analyzed quantitatively with the Rutherford backscattering detection method. Five micrographs were obtained per bracket with views from the vestibule/lingual, mesial, distal, gingival, and occlusal aspects. Quantitative analysis was carried out with surface analysis software (ImageJ 1.48). Data were analyzed by Mann-Whitney U and Kruskal-Wallis tests (α = 0.05). Results Total biofilm formation was 41.56% (min 29.43% to max 48.76%) on lingual brackets and 26.52% (min 21.61% to max 32.71%) on labial brackets. Differences between the two groups were found to be significant. No difference was observed in intraoral location. The biofilm accumulation was mostly located on gingival, mesial, and distal surfaces for both groups. Conclusions The biofilm accumulation on lingual orthodontic therapy was found to be more than labial orthodontic therapy.

Zinc Depletion Increases Readmission in Older Patients: An Example of Interactions Between Nutrition and Disease

2017 ◽  
Vol 87 (1-2) ◽  
pp. 10-16 ◽  
Author(s):  
Salah Gariballa ◽  
Awad Alessa
Keyword(s):  
Nutritional Status ◽  
Inductively Coupled Plasma ◽  
Older Patients ◽  
Controlled Trial ◽  
Prognostic Indicators ◽  
Hospitalised Patients ◽  
Increased Risk ◽  
Co Morbidity ◽  
The Impact ◽  
Poor Nutrition

Abstract. Background: ill health may lead to poor nutrition and poor nutrition to ill health, so identifying priorities for management still remains a challenge. The aim of this report is to present data on the impact of plasma zinc (Zn) depletion on important health outcomes after adjusting for other poor prognostic indicators in hospitalised patients. Methods: Hospitalised acutely ill older patients who were part of a large randomised controlled trial had their nutritional status assessed using anthropometric, hematological and biochemical data. Plasma Zn concentrations were measured at baseline, 6 weeks and at 6 months using inductively- coupled plasma spectroscopy method. Other clinical outcome measures of health were also measured. Results: A total of 345 patients assessed at baseline, 133 at 6 weeks and 163 at 6 months. At baseline 254 (74%) patients had a plasma Zn concentration below 10.71 μmol/L indicating biochemical depletion. The figures at 6 weeks and 6 months were 86 (65%) and 114 (70%) patients respectively. After adjusting for age, co-morbidity, nutritional status and tissue inflammation measured using CRP, only muscle mass and serum albumin showed significant and independent effects on plasma Zn concentrations. The risk of non-elective readmission in the 6-months follow up period was significantly lower in patients with normal Zn concentrations compared with those diagnosed with Zn depletion (adjusted hazard ratio 0.62 (95% CI: 0.38 to 0.99), p = 0.047. Conclusions: Zn depletion is common and associated with increased risk of readmission in acutely-ill older patients, however, the influence of underlying comorbidity on these results can not excluded.

Should all Hypertensive Patients be Screened for Primary Aldosteronism?

2019 ◽  
Vol 15 (1) ◽  
pp. 54-56
Author(s):  
Stelina Alkagiet ◽  
Konstantinos Tziomalos
Keyword(s):  
Resistant Hypertension ◽  
Primary Aldosteronism ◽  
Large Scale ◽  
Controlled Trial ◽  
The Other ◽  
Limited Data ◽  
Hypertensive Patients ◽  
Randomized Controlled ◽  
Increased Risk ◽  
Prospective Randomized Controlled Trial

Primary aldosteronism (PA) is not only a leading cause of secondary and resistant hypertension, but is also quite frequent in unselected hypertensive patients. Moreover, PA is associated with increased cardiovascular risk, which is disproportionate to BP levels. In addition, timely diagnosis of PA and prompt initiation of treatment attenuate this increased risk. On the other hand, there are limited data regarding the usefulness of screening for PA in all asymptomatic or normokalemic hypertensive patients. More importantly, until now, no well-organized, large-scale, prospective, randomized controlled trial has proved the effectiveness of screening for PA for improving clinical outcome. Accordingly, until more relevant data are available, screening for PA should be considered in hypertensive patients with spontaneous or diuretic-induced hypokalemia as well as in those with resistant hypertension. However, screening for PA in all hypertensive patients cannot be currently recommended.

Measuring Acceptability and Engagement of the Keep It Up! Internet-based HIV Prevention Randomized Controlled Trial for Young Men who have Sex with Men (Preprint)

2018 ◽  
Author(s):  
Krystal Madkins ◽  
David Moskowitz ◽  
Kevin Moran ◽  
Trey Dellucci ◽  
Brian Mustanski
Keyword(s):  
High School ◽  
Randomized Controlled Trial ◽  
Hiv Prevention ◽  
Controlled Trial ◽  
P Values ◽  
Randomized Controlled ◽  
Increased Risk ◽  
Intervention Acceptability ◽  
Intervention Content ◽  
Sex With Men

BACKGROUND Since 2010, HIV diagnoses among men who have sex with men (MSM) have remained stably high while decreasing for heterosexual men and women. The burden of infection has disproportionately impacted younger MSM of color relative to other populations. Despite the increased risk, there are few HIV prevention programs targeted to diverse and young MSM. The Keep It Up! (KIU!) online intervention was created to address the HIV prevention needs of this population. OBJECTIVE The objective of this study was to examine the acceptability and engagement of KIU!, and explore any differences by demographics, within the context of a randomized controlled trial (RCT). METHODS Between May 2013 and December 2015, 445 participants were randomized into the intervention arm of the KIU! RCT. Data were taken from the baseline assessment, KIU! 2.0 intervention modules, and immediate post-test assessments of intervention acceptability and engagement. Outcomes of interests were qualitative and quantitative measures of intervention acceptability and engagement as well as process measures (i.e., star ratings of intervention content and paradata on time spent in intervention). RESULTS Participants were an average of 24 years old, 62.9% (280/445) identified as a racial or ethnic minority, 86.5% (385/445) identified as gay, and 84.3% (375/445) reported having at least some college education. Most participants rated the intervention content highly (4 out of 5 stars) and gave the intervention an average acceptability score of 3.5 out of 4. Compared to White participants, Black participants found the intervention more useful (p = .03), engaging (p < .001), and acceptable (p = .001); Latino participants found the intervention more engaging (p = .03); and “other” non-White participants found the intervention more engaging (p = .008) and acceptable (p = .02). Participants with high school or less education found the intervention more useful, engaging, and acceptable, and were more likely to give intervention content a five star rating than college educated participants (p-values = .047, <.001, .002, .01 respectively) or those with graduate degrees (p-values = .04, .001, < .001, .004 respectively). White participants showed the most variation between education levels and reporting positive attitudes towards the intervention. Among Black participants, graduate degree-earning participants spent significantly more time on the intervention than high-school or less educated participants (p = .02). CONCLUSIONS Overall, participants gave the intervention high acceptability and engagement ratings; but it was most acceptable and engaging to participants who were younger, identified as racial and ethnic minorities, had less education, and lived in the South. As these are all groups with greater burden of HIV infection, the KIU! intervention is promising as a primary HIV prevention tool. Future implementations of KIU! are needed to assess its acceptability outside of the highly controlled environment of an RCT. CLINICALTRIAL RCT# NCT01836445

Sign in / Sign up

Export Citation Format

Share Document