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Öğe A Comparison of the Effectiveness of Combined Primer and Adhesive Systems in Orthodontic Bonding: An In Vitro Study(Mdpi, 2025) Uslu, Filiz; Gunes, Tugce Esra; Akin, Mehmet; Akman, HayriBackground: Adhesive systems are important for achieving reliable and durable bracket bonding in orthodontic treatments. The purpose of this study is to compare the outcomes of a new one-step orthodontic bonding system that combines the primer and adhesive solutions. Methods: In this study, four groups were formed, each consisting of 20 first premolar teeth. Acid etching was applied to all teeth for 30 s, except in Group II. Group I included teeth where a single layer of primer was applied using the Transbond XT system before bracket bonding. Group II consisted of teeth bonded with brackets after using a self-etching primer with the Transbond XT system. Group III used GC Ortho Connect, a single-step adhesive that incorporates the primer within the adhesive itself. Group IV, a single layer of primer was applied before bonding with GC Ortho Connect. Shear bond strength (SBS) was assessed using one-way ANOVA and the Tukey-HSD test, while Adhesive Remnant Index (ARI) scores were analyzed using the Chi-square test at a significance level of p < 0.05. Results: SBS measurements were recorded as 13.28 +/- 2.15 MPa for Group I, 11.06 +/- 2.26 MPa for Group II, 10.37 +/- 1.92 MPa for Group III, and 16.02 +/- 2.17 MPa for Group IV. Statistical analysis using the Tukey test revealed significant differences in SBS values between Groups II and IV, as well as Groups III and IV (p < 0.05). All groups showed clinically acceptable bond strength, with Group IV demonstrating superior adhesion. Additionally, the chi-square test indicated a statistically significant variation in the ARI scores across all four groups (p < 0.05). Conclusions: The adhesive performance of the one-step GC Ortho Connect system is clinically comparable to Transbond XT. However, primer application is necessary to achieve optimal bond strength.Öğe CAN THE SELF-ADHESIVE FLOWABLE COMPOSITE BE SECURELY BONDED TO PRIMARY TOOTH ENAMEL?(Serban Solacolu Foundation, 2021) Akman, Hayri; Surme, Koray; Akin, MehmetThis study evaluated the shear bond strength of self-adhesive flowable composite when used with acid etching or a self etch adhesive system. Buccal enamel surfaces on 80 extracted human primary incisors were used and randomly assigned into four groups (n=20); group 1: Vertise (TM) Flow; group 2: Vertise Flow with acid etching; group 3: Vertise Flow with a self-etching bonding agent; group 4: Premise FlowableTM with a total-etch bonding agent as the control group. After 5000 rounds of thermocycling, the bond strength test was performed using a universal testing machine at a crosshead speed of 0.5 mm/min. The fracture analyzes of samples were evaluated using a light stereomicroscope. The results obtained were analyzed via analysis of variance (ANOVA) and Tukey's tests. Statistically significant differences were observed among all groups (P<0.001). Group 1 generated a lower mean shear bond strength (2.63 +/- 1.08 MPa) than those of the other groups [group 2 (7.52 +/- 2.14 MPa), group 3 (5.12 +/- 2.93 MPa), and group 4 (14.18 +/- 2.93 MPa)]. Adhesive failure was the most common failure mode in Vertise Flow groups. Vertise Flow used with a self-etching agent or acid etching exhibited in lower shear bond strength than the control group.Öğe Evaluation of Parents' Knowledge and Attitudes Towards Pediatric Dental Practice during the COVID-19 Pandemic(Quintessence Publishing Co Inc, 2021) Surme, Koray; Akman, Hayri; Akbaydogan, Leyla Cime; Akin, MehmetPurpose: The coronavirus disease 2019 (COVID-19) pandemic is a major public health crisis worldwide and it also has generated new challenges for dentistry. The aim of this study was to evaluate the knowledge and attitudes of the parents of pediatric patients about dental treatment during the COVID-19 pandemic through a questionnaire. Materials and Methods: A structured questionnaire consisting of 15 multiple-choice questions and demographic information about the knowledge and attitudes of parents regarding dental treatment during the COVID-19 outbreak was used for the study. The participants were parents of pediatric patients (aged 8-14 years) who visited for a routine orthodontic examination at the department of orthodontics. Results: A total of 250 participants responded to the questionnaire. The findings indicate that more than 95% of parents had information about the transmission paths of the virus, took COVID-19 seriously, and told their children about this disease. 34% of the parents thought that dental clinics were more dangerous than other social areas, and 39.2% thought their children could be infected by medical instruments during dental treatment. A statistically significant difference was observed between educational levels in the answers given about the transmission paths of the virus, the danger of dental clinics in terms of the virus, the permitted dental treatment procedures, and the personal protective equipment of the dentist (p < 0.05). Conclusion: Although most parents have information about COVID-19, there are differences in the knowledge and attitudes of parents during the pandemic period according to their educational level.Öğe INVESTIGATION OF THE EFFECTS OF TWIN-BLOCK APPLIANCES ON DEMINERALIZATION OF LOWER FIRST PREMOLAR(Galenos Publ House, 2024) Mutluol, Esra U. L. U. S. O. Y.; Akin, MehmetObjective: The purpose of this study is to evaluate possible mineral losses in mandibular first premolars after the use of twin-block appliance, by enamel microhardness measurement method. Materials and Methods: Twenty patients (12 females, 8 males; mean age=12.21 +/- 1.12) indicated as fixed orthodontic treatment with mandibular first premolar extraction after functional treatment with twin-block were included in the study. The twin-block appliance was used continuously (excluding meals) for 12 months. The appliance used in this research, which is a split-mouth study, was designed to cover the first premolar only on one side of the mandible, leaving the opposite the first premolar tooth exposed. After the extraction of the mandibular first premolars, two groups were formed: the teeth outside the appliance (Group I) and the teeth inside the appliance (Group II). Hardness measurements were calculated using Vicker's microhardness measuring device on the buccal and lingual regions of the both groups. 200 g load was applied to specimens for 10 sec. Two Independent Sample t test used in the statistical analysis of the data. Results: A statistically significant difference was found between the hardness values of the buccal and lingual tooth regions of Group I and Group II (p < 0.05). Group II showed statistically significantly lower hardness values on both tooth regions (buccal region and lingual region) than Group I. In both groups, the hardness values on the buccal regions of the teeth were found to be significantly lower than the hardness values on the lingual regions (p < 0.05). Conclusion: There is a possibility of mineral loss in the teeth remaining inside the appliance in treatments using the twin-block appliance.
