Effects of contemporary orthodontic composites on tooth color following short-term fixed orthodontic treatment: A controlled clinical study

Background/aim: To determine the color alterations of natural teeth associated with different orthodontic composites used in comprehensive short-term treatment. Materials and methods: Twenty-two patients were treated with fixed appliances and 22 untreated subjects were also evaluated. Lower incisors were bonded with different orthodontic composites: 42 with Grengloo, 41 with Light Bond, 31 with Kurasper F, and 32 with Transbond XT. The color parameters of the Commission Internationale de l’Eclairage (CIE) were measured for each tooth with a spectrophotometer. Color assessment in relation to time, adhesive material, and their interaction was made with 2-way mixed analysis of variance (ANOVA) and 1-way ANOVA for the color differences (ΔE*). Further analyses were done using Tukey’s honestly significant difference tests and paired-samples t-tests. Results: The color of teeth was affected by treatment. The mean L* and a* values increased, whereas the mean b* values decreased. Total color differences of teeth demonstrated visible color changes clinically after treatment, ranging from 1.12 to 3.34 ΔE units. However, there were no significant differences for color of enamel. Conclusion: Teeth may be discolored with fixed appliances during treatment. Moreover, contemporary orthodontic composites have similar effects of enamel discoloration. © TÜBİTAK

Bisphosphonates

Bisphosphonates are used with the purpose of preventing bone resorption in some metabolic bone diseases. These drugs have been introduced into clinical use about 30 years ago and widely used in nowadays. As Orthodontic some different researches have been made which imply that this medicine that can be used as supplementary agents to prevent the unwanted teeth movements and relapse after expansion. Within the last few years, articles have been published which mention the probable relationship between the long term usage of bisphosphona-te and the formation of osteonecrosis in the jaws. The aim of this review is to inform orthodontist about uses, pharmacokinetics, mechanism of action and probable complication

Fragility Analysis of Atmospheric Storage Tanks by Observational and Analytical Data

In this research, seismic fragility analysis of storage tanks is carried out with a large damage database from past earthquakes and analytical studies. At the fragility analysis, a new damage state has been defined. Peak ground acceleration is employed as an intensity measure. Epistemic and aleatory uncertainties are considered. At the observational fragility analysis, logit, probit and cumulative lognormal model and maximum likelihood method are utilized. In this research, Finite Element Analysis is also performed. As a result, new seismic fragility curves for storage tanks obtained and compared with the existing tank fragility curves in the literature

Nasoalveolar Molding Treatment for a Patient With Amniotic Band Syndrome: A Case Report

Amniotic band syndrome (ABS) is an uncommon congenital malformation characterized by clubfoot deformity, hand and finger anomalies, and cleft lip and palate. In this study, the literature about ABS—possible etiology, treatment protocols, and medical procedures—is discussed. The aim of this study was to evaluate efficiency of nasoalveolar molding therapy for a patient with cleft lip and palate and ABS. Changes were evaluated before, during, and after the treatment period using a three-dimensional surface imaging system

Simplified Indirect Bonding Technique for Lingual Retainer Fabrication

Aim:The aim of this study was to describe a simplified technique for fabricating an indirectly bonded lingual retainer using a light cure composite resin and clear tape.Subjects and Methods:Lingual retainers, made of dead soft wire, were bended to the lingual contour of the lower incisors on the stone models of patients and placed to the mouth. Fabricating lingual retainers with this method were used in 6 patients who were followed for 6 months.Results:During this period, failures occurred in 2 teeth. One failure was on a canine; the other one is on an incisor.Conclusion:Due to the isolation done with a clear tape in this method, there is no need for an extra procedure for the removal of the remnants of the separating medium from the resin surface. These extra procedures applied can cause the degradation of the resin surface which may lead to bonding failure

Multiple Purpose Essix Appliance

A new design of Essix appliance and its fabrication are described in this article. This case report illustrates both correction of anterior cross bite and distal movement of maxillary molars. This new vacuum formed Essix appliance can be a reasonable alternative to conventional appliances

Antibacterial Effects of Fluoride-Releasing Orthodontic Composites: A Pilot Study

Aim:The purpose of this study was to evaluate the antibacterial effects of 3 different fluoride-releasing orthodontic composites using a direct contact test (DCT).Materials and Methods:The antibacterial properties of fluoride releasing orthodontic composites were evaluated with the DCT. For the DCT, wells (n=8) of 96-microtitre plates were coated with the tested bonding adhesives [Transbond Plus (3M Unitek, Monrovia, USA) Light Bond (Reliance Ortho Prod. Inc. Itasca, IL, USA) Kurasper F (Kuraray Medical Inc. Okayama, Japan)]. Kalzinol (Zinc-Oxide Eugenol Cement) (Dentsply, Konstanz, Germany was used as a positive control material. A Streptococcus mutans suspension was placed on the surface of each specimen for 1 hour at 37°C. Bacterial growth was monitored for 16 hours with a temperature-controlled microplate spectrophotometer. The kinetics of the outgrowth in each well was recorded continuously at 650 nm every 30 minutes. The data were analyzed by one-way ANOVA, as well as by Tamhane's T2 multiple comparison test. The level of significance was determined as P < 0.05.Results:The evaluation of the results of the DCT revealed that there were statistically significant differences between the four groups (F= 156,951, P= 0.000). The control material (Kalzinol) showed complete inhibition of bacterial growth (mean 0.01 ±0.05). The multiple comparison test indicated that there were no significant difference in bacterial growth between Kalzinol and Transbond Plus (mean 0.12±0.17) (P= 0.509).. Kurasper F (mean 0.73±0.06) and Light Bond (mean 0.85±0.02) showed statistically significant differences (P= 0.000) compared to Kalzinol.Conclusion:Transbond Plus showed marked antibacterial effects

3 boyutlu görüntüleme tekniği kullanılarak nazoalveoler şekillendirme ve cerrahi sonrasında tedavi sonuçlarının değerlendirilmesi: olgu sunumu

Dudak damak yarıkları yüz yapılarında en sık görülen konjenital anomalidir. Ülkemizde 1/800 oranında görülmektedir. Bu anomaliye sahip bireylere ameliyat öncesi ortopedik uygulamalar yaygın biçimde yapılmaktadır. Bu olgu sunumunun amacı, 3 boyutlu görüntüleme tekniği kullanılarak ameliyat öncesi nazoalveolar şekillendirme ve ameliyat sonrasında elde edilen değişiklikler açısından bilateral dudak damak yarıklı bir bebeğin tedavi sonuçlarını değerlendirmektir.Dudak damak yarıkları yüz yapılarında en sık görülen konjenital anomalidir.1 Ülkemizde 1/800 oranında görülmektedir.2 Dudak damak yarıklı bebeklerde en önemli sorun beslenme zorluğudur. Bunun yanı sıra, bu bireylerde işitme kaybı ve ağız kokusu görülmekte; ayrıca dental arklarda eksik ve/veya malforme diş bulunabilmektedir.3,4 İleri dönemlerde kendine güvende yetersizlik, konuşma güçlüğü ve konuşma bozukluğu, bunlara bağlı olarak öğrenmede güçlük ve sosyal izolasyon karşılaşılan diğer problemlerdendi

Long-Term Antibacterial Effects of Different Orthodontic Cements

Aim:The purpose of this study was to evaluate the antibacterial properties of different orthodontic cements using a direct contact test (DCT).Materials and Methods:The antibacterial properties of 6 orthodontic cements were evaluated with DCT. For the DCT, wells (n=8) of 96-microtiter plates were coated with the tested cements (Durelon, Ketac-Cem Radiopaque, GC Fuji Ortho Band LC Paste Pak, Meron, Ultra Band Lok, and 3M Unitek Multi Cure). A Streptococcus mutans suspension was placed on the surface of each specimen for 1 hour at 37°C. Bacterial growth was monitored for 16 hours with a temperature-controlled microplate spectrophotometer. The kinetics of the outgrowth in each well was recorded continuously at 650 nm every 30 minutes. Additional experiments were performed in which the tested materials were aged for 1 week, 1 month and 3 months. The data were analyzed by one-way ANOVA, and Tamhane's T2 multiple comparison test.Results:The results of the DCT showed that, freshly mixed samples of 3M Multi Cure (P=0.02), GC Fuji Ortho (P=0.04), Meron (P=0.001), and Durelon (P=0.001) showed antibacterial activity. After aging for one week 3M Unitek Multi Cure (P=0.000), Durelon (P=0.03) still showed antibacterial activity. In the experiments with 1 month aged specimens, only Durelon (P=0.001) showed antibacterial activity. In the 3 months aged specimens, 3M Multi Cure (P=0.000), GC Fuji Ortho (P=0.001), and Durelon (P=0.001) showed antibacterial property.Conclusion:Within the limitations of this study, 3M Unitek Multi Cure, GC Fuji Ortho, and Durelon, showed antibacterial properties during study period

Evaluation of the genotoxicity and cytotoxicity in the buccal epithelial cells of patients undergoing orthodontic treatment with three light-cured bonding composites by using micronucleus testing

Objective: This study evaluated the cytotoxicity and genotoxicity of fixed orthodontic treatment with three different light-cured orthodontic bonding composites by analyzing micronucleus (MN) formation in the buccal mucosa during a 6-month period. Methods: Thirty healthy volunteers were selected from consecutive patients referred for orthodontic treatment. Equilibrium 2 brackets and molar tubes (Dentaurum) were bonded with three different lightcured orthodontic bonding composites-Transbond XT (3M Unitek), Kurasper F (Kuraray Europe), or GrenGloo (Ormco Corporation)- to all teeth in both arches. Exfoliated buccal epithelial cells were scraped from the middle part of the inner cheeks with sterile cement spatulas before treatment and at 1, 3, and 6 months after treatment. MNs and nuclear alterations, such as karyorrhexis (KR), karyolysis (KL), and binucleated cells (BNs), were scored under a light microscope. Repeated measure ANOVA was used to calculate statistical differences in degenerative nuclear abnormalities. Results: MN rates did not significantly differ among different time points within the same cell type (p > 0.05). In contrast, the number of BNs in buccal epithelial cells significantly increased in all composite groups (p < 0.01, Transbond XT; p < 0.001, Kurasper F and GrenGloo). KL frequency significantly increased between the beginning and end of the study in the Kurasfer F (0.80 ± 0.79 to 1.90 ± 1.10; p < 0.05) and GrenGloo (1.30 ± 1.06 to 2.40 ± 1.08; p < 0.05) groups. Conclusions: After 6 months of fixed orthodontic treatment with different light-cured composites, morphological signs of cytotoxicity were observed but genotoxic effects were absent. © 2014 The Korean Association of Orthodontists