Yazar "Danisman, Hikmetnur" seçeneğine göre listele

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    Bioinspired synthesis of nanocomposites
    (IGI Global, 2024) Ekrikaya, Semiha; Danisman, Hikmetnur; Baktir, Seda; Arslan, Soley Arslan; Ocsoy, Ismail
    The design of nanocoatings and nanostructured based surfaces stands out in many fields and biomedical applications due to their superior advantages over traditional coatings. With current nanotechnological approaches, properties such as antimicrobial activity, biocompatibility, increased product life-time, quality interface bonding, enhanced chemical and mechanical properties, high hardness, heat insulation, dirt and water repellency, corrosion resistance, improved energy efficiency, and reduced moisture absorption have been significantly improved. In recent years, the use of NPs and nanocoatings in the design and development of many dental materials has become highly popular in dentistry due to their ability to provide unique combinations of properties. This section will primarily focus on nanocoating materials used in dentistry. © 2024, IGI Global.
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    Comparison of skeletal and dental effects of two different tooth-tissue-borne types of rapid maxillary expansion appliances: A CBCT retrospective study
    (Wiley, 2023) Karaman, Ahmet; Danisman, Hikmetnur; Genc, Esra; Buyuk, S. Kutalmia
    Objectives To compare the skeletal and dental effects of different types of rapid maxillary expansion (RME) appliances using cone-beam computed tomography (CBCT). Materials/Methods This multi-centre study was conducted with a total of 56 patients. The sample consisted of two groups including the McNamara-Type RME (MNR) group with 30 patients (16 females, 14 males, mean age: 13.38 +/- 1.16 years) and Full-Coverage RME (FCR) group with 26 patients (10 females, 16 males, mean age:13.78 +/- 1.06 years). Twenty-one parameters were measured on CBCT images including 4 maxillary skeletal, 12 maxillary alveolar, and 5 maxillary dental measurements, and the data were analysed using the SPSS 20.0 software. Results The rates of increase in the palatal maxillary width (PMW) (3), PMW(4), and PMW(6) were significantly higher in the MNR group (P < .05). While the rates of increase in the buccal maxillary width (BMW) (3) and BMW(4) were statistically higher in the MNR group, the rate of increase in BMW (6) was higher in the FCR group (P < .05). The increases in HPW (4), HPW (6), PAA4(degrees), and PAA6(degrees), which are parameters about hard palate width (HPW) and palatal alveolar angle (PAA), were also significantly higher in the MNR group (P < .05). The increases in PAW (4) and PAW (6), referring to the widths between the palatal root apices were significantly higher in the MNR group (P < .05).The increase in Slope-6(degrees) was also higher in the MNR group (P < .05). Conclusion Expansion in the palatal region on the alveolar level was higher in MNR than in FCR, while expansion in FCR was the highest in the posterior. In both appliances, there was tipping in the buccal direction in both alveolar bone and teeth, and the rate of this tipping was higher in MNR.
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    Effects of diamond-like carbon coating on frictional and mechanical properties of orthodontic brackets: An in vitro study
    (Scientific Scholar Llc, 2022) Danisman, Hikmetnur; Celebi, Fatih; Danisman, Sengul; Bicakci, Ali Altug
    Objectives: The aim of this study is to apply a diamond-like carbon (DLC) coating on orthodontic brackets and to examine the effects of the coating on surface properties and friction. Material and Methods: 0.022-inch upper right canine brackets, 0.018-inch stainless steel wires, and 0.019 x 0.025-inch stainless steel wires were used in the study. Half of the brackets were treated with physical vapor deposition technique and coated with DLC. Different binary groups constituted of coated and uncoated brackets and wires were subjected to friction experiments using the Instron universal testing machine (Instron, Norwood, MA, USA). The surface properties of the coatings were evaluated using Raman, Scanning Electron Microscopy, and non-contact optical profilometer. Results: The friction force values between the DLC-coated brackets and the stainless-steel wires in both dimensions were found to be statistically significantly lower than the friction force between the uncoated brackets and the wires (P < 0.001). The surface roughness value, especially around the slot groove decreased significantly in the coated brackets (P < 0.05). DLC coating layer thickness is approximately 1.0 mu m (806 nanometers). Conclusion: DLC coating improves the surface properties of orthodontic brackets, and DLC coating process remarkably reduced the friction force.
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    The effect of temporomandibular joint dysfunction on the craniocervical mandibular system: A retrospective study
    (Wiley, 2024) Ozturk, Kubra; Danisman, Hikmetnur; Akkoca, Fatma
    Background: Temporomandibular disorders are the most common condition affecting the orofacial region, resulting in pain and dysfunction.Objective: This study aimed to elucidate the ambiguous association between cervical features and temporomandibular disorders by measuring the rotations between the skull-atlas, atlas-axis and mandible-atlas and examining the relationship between these rotations and temporomandibular disorders.Methods: Cone-beam computed tomography (CBCT) images from 176 patients, 97 females and 79 males with an average age of 25.7 years were used in this study. The patients were divided into two groups: those with joint dysfunction (n = 88) and those without (n = 88). The study employed various methods to determine rotations in the skull-atlas, atlas-axis and mandible atlas based on anatomical landmarks and measurements. These methods include the use of specific planes, angles and distances to identify and measure rotation. Data analysis was performed using the TURCOSA statistical software (Turcosa Analytics Ltd Co, Turkey, www.turcosa.com.tr).Results: The results showed that the degree of rotation between the skull and the atlas was higher in the TMD group than in the control group (p < .001). Similarly, Atlas-axis rotation was significantly higher in the TMD group (p < .001). However, no significant difference was found between mandible atlas rotations in the two groups (p = .546). The study also found a significant difference between the direction of rotation between the atlas and axis and the direction of mandible atlas rotation (p < .001) as well as between skull and atlas rotations and mandible-atlas rotations (p < .001).Conclusion: Overall, the study suggests that there is a relationship between the skeletal structures of the cranio-cervico-mandibular system and TMD. Skull-atlas and atlas-axis rotations may play an important role in the aetiology of TMD in individuals with TMD. Therefore, it is important to evaluate rotations in the skull-atlas-axis region for the treatment of TMD.