scholarly journals Nickel, Chromium and Iron Levels in the Saliva of Patients with Simulated Fixed Orthodontic Appliances

2008 ◽  
Vol 78 (2) ◽  
pp. 345-350 ◽  
Author(s):  
Rodrigo Matos de Souza ◽  
Luciane Macedo de Menezes
Keyword(s):  
Study Groups ◽  
Atomic Absorption Spectrophotometry ◽  
Nonparametric Tests ◽  
Orthodontic Appliances ◽  
Aisi 316L ◽  
Nickel Chromium ◽  
Fixed Orthodontic Appliances ◽  
Group B ◽  
Removable Appliance

Abstract Objective: To assess the in vivo release of nickel, chromium, and iron ions into saliva by different metallic brackets. Materials and Methods: Thirty volunteers wore removable appliances with bonded brackets and were divided according to the brand of brackets: group A, 3M/Unitek (AISI 303); group B, American Orthodontics (AISI 316L); and group C, Dentaurum (AISI 316L). The appliances were worn for 60 days, and saliva samples were collected at the following time points: T1, before placement of the appliance; T2, after 10 minutes; T3, 24 hours; T4, 7 days; T5, 30 days; and T6, 60 days after insertion of the removable appliance. Saliva samples were analyzed for nickel, chromium, and iron by atomic absorption spectrophotometry. Statistical analysis was performed by nonparametric tests (Friedman, Mann-Whitney, Kruskal-Wallis). Results: Saliva evaluation revealed a large variation in concentration of these ions between individuals. The results also appeared to indicate an increase in nickel and chromium ions immediately after placement of the appliance (T2), but this was statistically significant only for groups B and C. There was no increase in iron levels. A tendency for increases in nickel and chromium concentrations was verified immediately after placement of the appliance, but these values are probably reduced because of biofilm formation regardless of the bracket used. Conclusion: Nickel and chromium ion concentrations increased immediately after placement of the appliance in the mouth for all study groups. There were no significant differences in the nickel, chromium, and iron levels released by the three groups of appliances at all study periods.

scholarly journals In vivo study on the release of nickel, chromium, and zinc in saliva and serum from patients treated with fixed orthodontic appliances

2019 ◽  
Vol 16 (4) ◽  
pp. 209 ◽  
Author(s):  
DilipDaniel Quadras ◽  
US Krishna Nayak ◽  
NSuchetha Kumari ◽  
HR Priyadarshini ◽  
Srinivasa Gowda ◽  
...  
Keyword(s):  
In Vivo Study ◽  
Orthodontic Appliances ◽  
Nickel Chromium ◽  
Fixed Orthodontic Appliances

scholarly journals In vivo Study on Release of Nickel, Chromium, and Zinc and DNA Damage in Buccal Mucosa Cells from Patients Treated with Fixed Orthodontic Appliances

2018 ◽  
Vol 52 (2) ◽  
pp. 115-119
Author(s):  
Dilip Daniel Quadras ◽  
U S Krishna Nayak ◽  
N Suchetha Kumari ◽  
H R Priyadarshini ◽  
Srinivasa Gowda ◽  
...  
Keyword(s):  
Dna Damage ◽  
Buccal Mucosa ◽  
In Vivo Study ◽  
Orthodontic Appliances ◽  
Nickel Chromium ◽  
Buccal Mucosa Cells ◽  
Fixed Orthodontic Appliances

scholarly journals Clinical evaluation of periodontal health during orthodontic treatment with fixed appliances

2014 ◽  
Vol 60 (6) ◽  
pp. 265-268
Author(s):  
T. Hănțoiu ◽  
Adriana Monea ◽  
Luminița Lazăr ◽  
Liana Hănțoiu
Keyword(s):  
Oral Hygiene ◽  
Orthodontic Treatment ◽  
Study Groups ◽  
T Test ◽  
Orthodontic Appliances ◽  
Periodontal Health ◽  
Fixed Orthodontic Appliances ◽  
Fixed Appliances ◽  
Group B ◽  
Interdental Brush

Abstract Objectives: Fixed orthodontic appliances make daily application of oral hygiene standard procedures more difficult and in time may lead to accumulation of oral biofilms and development of gingivitis and hyperplasia. The aim of the study is to evaluate the periodontal health expressed by clinical indices in patients under orthodontic treatment with fixed appliances, according to different oral hygene maintenance programs. Material and method: We performed a randomized prospective study on 60 patients with fixed orthodontic appliances (17-25 years of age) devided in three study groups. The clnical indices recorded were: modified gingival index, plaque index and sulcular bleeding index. Statistical analysis or the results were carried out using Student t test. Results: The patients were randomly divided into three groups: group A-patients were instructed to use electric brush, water flosser and interdental brush, group B- electric brush, interdental brush and fluoride and group C- manual brushing and fluoride. Statistical comparison of the values of the indexes with the Student t test for independent samples showed statistically significant differences in all three groups of patients studied between initial and final values of all recorded clinical parameters. Conclusions: Fixed orthodontics do not induce periodontal disease if basic principles of oral hygiene are followed in compliant patients, which are correctly instructed to deal with real challenge, represented by complete elimination of debris and bacterial accumulation.

In vivo Study on Release of Nickel, Chromium, and Zinc and DNA Damage in Buccal Mucosa Cells from Patients Treated with Fixed Orthodontic Appliances

2018 ◽  
Vol 52 (2) ◽  
pp. 115-119
Author(s):  
Dilip Daniel Quadras ◽  
U S Krishna Nayak ◽  
N Suchetha Kumari ◽  
H R Priyadarshini ◽  
Srinivasa Gowda ◽  
...  
Keyword(s):  
Dna Damage ◽  
Buccal Mucosa ◽  
In Vivo Study ◽  
Orthodontic Appliances ◽  
Nickel Chromium ◽  
Buccal Mucosa Cells ◽  
Fixed Orthodontic Appliances

scholarly journals Scanning electron microscopic examination of enamel surface after fixed orthodontic treatment: In-vivo study

2012 ◽  
Vol 140 (1-2) ◽  
pp. 22-28 ◽  
Author(s):  
Tijana Sessa ◽  
Jelena Civovic ◽  
Tina Pajevic ◽  
Jovana Juloski ◽  
Milos Beloica ◽  
...  
Keyword(s):  
Electron Microscopic Examination ◽  
Surface Damage ◽  
Multivariate Regression Analysis ◽  
Enamel Surface ◽  
Orthodontic Appliances ◽  
Electron Microscopic ◽  
Fixed Orthodontic Appliances ◽  
Tooth Surfaces ◽  
Scanning Electron

Introduction. Therapy with fixed orthodontic appliances starts with bracket bonding and ends with debonding of brackets, leaving enamel surface varied. Objective. The aim of this pilot study was to examine enamel surface before and after debonding of orthodontic brackets by the use of scanning electron microscopy (SEM). Methods. Epoxy replicas of four patients? premolars indicated for therapy with fixed orthodontic appliances were made and brackets were bonded to their teeth with a different adhesives (Enlight, No-mix, Fuji Ortho LC and Heliosit Orthodontic) (n=4). Two months later, brackets on premolars were debonded and amounts of adhesive left on the tooth surfaces and the bracket bases were evaluated with the adhesive remnant index (ARI). After resin removal, epoxy replicas were made and the surface of premolars was evaluated with the enamel surface index (ESI). All replicas of premolars (n=32) were prepared for SEM examination and compared under different magnifications. Tooth damage was estimated based on correlation between ARItooth and ESI. Results. Pearson?s ?2 test showed no significant differences between ARItooth and ARIbracket of four materials used. Nonparametric correlations showed significant differences between ARItooth and ARIbracket, ESI and ARItooth, and between ESI and ARIbracket. Increasing of ARItooth is followed with the descent of ARIbracket and the ascent of ESI. Multivariate regression analysis showed a significant correlation between ESI and ARItooth. Conclusion. Most bond failures took place at enamel-adhesive interface. ARItooth was a predictor to enamel surface damage. The type of material did not affect enamel surface damage.

scholarly journals Microbiological Evaluation of Octenidine Dihydrochloride Mouth Rinse after 5 Days' Use in Orthodontic Patients

2009 ◽  
Vol 79 (4) ◽  
pp. 766-772 ◽  
Author(s):  
Alev Aksoy Dogan ◽  
Emel Sesli Cetin ◽  
Emad Hüssein ◽  
Ali Kudret Adiloglu
Keyword(s):  
Inhibitory Effect ◽  
Oral Bacteria ◽  
Lactobacillus Species ◽  
Orthodontic Appliances ◽  
Cariogenic Bacteria ◽  
Fixed Orthodontic Appliances ◽  
Octenidine Dihydrochloride ◽  
Orthodontic Patients ◽  
Fixed Appliances

Abstract Objective: To determine the absolute and relative antibacterial activity of octenidine dihydrochloride (OCT) against total and cariogenic bacteria in saliva samples of patients with fixed orthodontic appliances during 5 days of usage. Materials and Methods: The study group consisted of 5 male and 13 female subjects who were selected from patients in the Clinic of Orthodontics. Each patient was given physiologic saline (PS), chlorhexidine gluconate (CHX), polyvinylpyrrolidone-iodine complex (PVP-I), and OCT every morning for 5 days, each separated by a 2-week interval. Total and cariogenic bacteria in saliva samples of orthodontically treated patients with fixed appliances were collected during 5 days of usage. Unstimulated saliva was collected as a baseline sample. Saliva samples were collected at 15 minutes, and on the second, third, and fifth day after rinsing the mouth with any of the solutions for 30 seconds, and bacterial counts were detected. Results: OCT showed an ultimate reduction of total viable oral bacteria, Lactobacillus species, and Streptococcus mutans in vivo. OCT also had a significantly greater inhibitory effect than 0.2% CHX and 7.5% PVP-I, from the beginning of the study until the fifth day after the orthodontic appliances were bonded (P < .1). Conclusions: OCT compared favorably with respect to CHX and PVP-I complex in orthodontically treated patients with fixed appliances (P ≤ .1).

scholarly journals Evaluation of Surface Roughness of a Ni-Cr Alloy Treated With the Nd/YAG Laser and the Sandblast Technique

2021 ◽  
Vol 12 (1) ◽  
pp. e69-e69
Author(s):  
Elnaz Moslehifard ◽  
Mir Mahdi Seyyedashrafi ◽  
Nasim Khosronejad
Keyword(s):  
Surface Roughness ◽  
Nd:Yag Laser ◽  
Study Groups ◽  
Spot Size ◽  
Chromium Alloy ◽  
Air Abrasion ◽  
Average Roughness ◽  
Average Value ◽  
Nickel Chromium ◽  
Group B

Introduction: This study was to assess the effect of various output parameters of laser treatment on roughening the surface of a commercial nickel-chromium (Ni-Cr) alloy as compared to the sandblasting technique. Materials and Methods: Ninety-six disk-shaped (5 mm diameter and 2 mm thickness) specimens in total were made of a nickel-chromium alloy by using the lost-wax technique. Air-abrasion surface treatment was used for sixteen specimens. Specimens were divided into six groups; one of them was sandblasted and the rest were irradiated by different Nd:YAG laser output parameters as follows: Group A: energy: 122 mJ, frequency: 20 Hz, irradiation duration: 20 seconds, spot size: 1.5 mm; Group B: energy: 122 mJ, frequency: 20 Hz, irradiation duration: 20 seconds, spot size: 3.5 mm; Group C: energy: 122 mJ, frequency: 10 Hz, irradiation duration: 20 seconds, spot size: 3.5 mm; Group D: energy: 102 mJ, frequency: 10 Hz, irradiation duration: 20 seconds, spot size: 3 mm; Group E: energy: 102 mJ, frequency: 20 Hz, irradiation duration: 20 seconds, spot size: 3 mm. The surface roughness of all surface-treated specimens was evaluated by using a profilometer, and their average roughness (Ra) was calculated. The average value of each group was analyzed by t test and one-way ANOVA (SPSS 17). Results: Significant differences (P<0.05) were observed between the study groups. The highest Ra was achieved for the sandblasted group. The Ra value in group C was the highest value among the laser-etched groups. Conclusion: Based on the results, Nd:YAG laser irradiation increases surface roughness, but it is not as efficient as the sandblasting method as a gold standard.

scholarly journals ASSESSMENT OF ENAMEL SURFACE AFTER APPLICATION OF TUNGSTEN CARBIDE BUR FOR RESIDUAL ADHESIVE REMOVAL

2018 ◽  
Vol 9 (2) ◽  
Author(s):  
Marijana Arapović Savić ◽  
Adriana Arbutina ◽  
Mirjana Umićević Davidović ◽  
Vladan Mirjanić ◽  
Irena Kuzmanović Radman
Keyword(s):  
Composite Material ◽  
Tungsten Carbide ◽  
Damage Index ◽  
Enamel Surface ◽  
Orthodontic Appliances ◽  
Fixed Orthodontic Appliances ◽  
Significant Difference ◽  
Group A ◽  
Group B ◽  
Adhesive Removal

Enamel damage often occurs in a process of adhesive removal after the completion of therapy with fixed orthodontic appliances. The aim of this study was to evaluate the enamel surface after applying a 12-fluted round tungsten carbide bur for adhesive removal at different speeds of dental micro motor after debonding brackets. Material and method: On 40 human premolars, extracted for orthodontic purposes, metal brackets were bonded with composite material. After removing the brackets, the sample was divided into two groups: group A - 20 teeth from which the rest of the composite material was removed with a round tungsten carbide bur at 8,000 rotations per minute and group B - 20 teeth from which the rest of adhesive was removed with a round tungsten carbide bur at 32,000 rotations per minute. For each sample, four images were made under different magnifications by scanning electron microscopy, and the damage estimation was performed using the Enamel damage index (EDI) and Surface roughness index (SRI). Results: The most common EDI score on the overall level was 3 (62.5%), while the most commonly represented SRI score was 2 (52.5%). There was no statistically significant difference in the average values of the EDI index (t (38) = -.96, p> .05) and in the average SRI index values (t (38) = -. 89, p> .05) between two tooth examined groups. Conclusion: Enamel damage was found after applying a round tungsten carbide bur at 8,000 and 32,000 rpm. The number of rotations per minute did not affect the size of enamel damage.

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