Effects of Ozone and Prophylactic Antimicrobial Applications on Shear Bond Strength of Orthodontic Brackets

Objective:The present study aimed to evaluate the effects of ozone and prophylactic antimicrobial applications on the shear bond strengths and bond failure interfaces of orthodontic brackets.Methods:Sixty human canine teeth were randomly divided into three groups (n=20), receiving the following treatments: Group I-pumice prophylaxis (Isler Dental, Ankara, Turkey)+37% orthophosphoric acid (Dentsply, Rio de Janeiro, Brazil)+Transbond XT primer and adhesive (3M Unitek, Monrovia, USA); Group II-prophylaxis paste (Topex, NJ, USA)+37% orthophosphoric acid (Dentsply, Rio de Janeiro, Brazil)+ Transbond XT primer and adhesive paste (3M Unitek, Monrovia, USA); and Group III-ozone application (Biozonix GmbH, Munich, Germany)+37% orthophosphoric acid (Dentsply, Rio de Janeiro, Brazil)+Transbond XT primer and adhesive (3M Unitek, Monrovia, USA). All specimens were stored at 37°C water for 24 h. Shear bond strength was assessed using a universal testing device (Autograph AGS-X; Shimadzu, Japan). Adhesive remnant index (ARI) scores were obtained through examination of teeth under stereomicroscope at 10× magnification after debonding.Results:Shear bond strengths of orthodontic brackets were 16.10, 18.01, and 19.23 MPa for Groups I, II, and III, respectively. No statistically significant difference in shear bond strength of orthodontic brackets was found among the groups (p=0.273), based on Kruskal-Wallis analysis. Additionally, no significant difference was found in the ARI scores of each group using chi-square analysis (p=0.992).Conclusion:Shear bond strength of orthodontic brackets and ARI scores was not found to be negatively impacted by ozone application

Intravitreal Bevacizumab Treatment in Type 2 Idiopathic Macular Telangiectasia

Objectives: To evaluate the efficacy of intravitreal bevacizumab treatment in type 2 idiopathic macular telangiectasia (IMT). Materials and Methods: Six eyes of 5 patients with type 2 IMT who received intravitreal bevacizumab between 2009 and 2014 were included in this study. All the patients had an ophthalmological examination including best corrected visual acuity (BCVA), dilated fundus examination, spectral domain optical coherence tomography (OCT) and fluorescein angiography. Intravitreal bevacizumab injection was planned for patients who had macular edema and/or decreased visual acuity at baseline. Patients were examined 1 week and 1 month after the intravitreal injection. Intravitreal injection was repeated in patients whose visual acuity decreased and/or whose macular edema persisted or increased. Changes in BCVA, central macular thickness (CMT) and central macular volume from baseline at 1 month after the first injection and at final examination were evaluated. Results: Average age of the patients (4 female and 1 male) was 62±11.8 years. Average follow-up period was 26±11 months. Patients received an average of 2.3 (range 1-4) injections during follow-up. Average Snellen BCVA of the patients was 0.48±0.29. BCVA increased at final examination compared to baseline in all of the patients. The difference between baseline and final visual acuities was significant (p<0.05). The patients’ average CMT was 328±139 µm at baseline and decreased by a mean of 85±153 µm at 1 month after the first injection and 65±142 µm at final examination, but the changes were not significant. CMT decreased at final examination compared to baseline in four patients and increased in both eyes of one patient. Conclusion: Intravitreal bevacizumab injection is a preferable treatment method in regard to both visual acuity and OCT findings

TanDEM-X12m Sayısal Yükselti Verisine Dayalı Toprak Erozyonu Tespiti (Rusle)

Soil is one of the most important natural resources in the world. Determination of soil degradation has been widely attempted all over the world in the last 50 years. This study provides a perspective of comparing the digital elevation model (DEM) in terms of the Revised Universal Soil Loss Equation (RUSLE) model, which calculates soil loss in Mountain Karadağ - Akçay Basin. RUSLE comprises the topographic (LS), climatic (R), vegetation (C), soil (K), and support practice (P) parameters. To evaluate soil loss in the Akçay Basin, TanDEM-X12m. DEM was used and compared with ALOS12.5m and SRTM30m. DEM. Distribution of soil loss has a positive correlation with slope degree (R2 = 0.62) and rainfall and runoff factor (R). As the elevation increases in the short range (15 km) from south to north in Akçay Basin, the rainfall and runoff increase together with elevation. The tributaries of the trunk river (Akçay) were characterized by a narrow and incised V-shaped valley, and this gave rise to increase in the LS factor in the short range. This phenomenon shows that the LS factor is one of the most important factors with regard to triggering factors. According to the TanDEM-X12m-based DEM, the mean annual soil loss is 28 ton ha−1 ya−1 from the basin. Keywords: Soil Loss, Rusle, TanDEM-X12m DE

Child perceptions questionnaire 11-14 in Turkish language in an orthodontic patient sample

The Child Perceptions Questionnaire 11-14 (CPQ 11-14) is a generic tool that was developed to measure oral health-related quality of life in early adolescents. The aim of this study was to prepare a Turkish version of the CPQ 11-14 and to test its psychometric properties in an adolescent orthodontic patient sample. Materials and Methods The questionnaire was adapted to Turkish using a forward backward translation method, and it was found to be understandable in a pilot study (n=15). The Turkish version of the CPQ 11-14 was administered to 200 orthodontic consultation patients (aged 11–14 years). Retests were conducted in 50 patients 2 weeks after the first tests. The ICON index was used to determine the orthodontic treatment need. Decayed, missing, and filled teeth were also recorded with the DMFT index. Spearman correlations and t-tests were used to assess validity. Internal consistency was assessed using Cronbach’s alpha coefficient, and intraclass correlation coefficients were calculated to assess test–retest reliability. Results Significant positive correlations were found between CPQ 11-14 scores and the global ratings of oral health (r=0.381), global ratings of well-being (r=0.350), ICON scores (r=0.211), and DMFT scores (r=0.233), supporting construct validity. Children who needed orthodontic treatment had a worse quality of life than those who did not need orthodontic treatment (p=0.016). Cronbach’s alpha and intraclass correlation coefficients were calculated as 0.917 and 0.817, respectively, demonstrating good internal consistency and acceptable test–retest reliability. Conclusion The Turkish version of the CPQ 11-14 was found to be valid and reliable in 11–14-year-old orthodontic patients