Hacettepe Üniversitesi Açık Erişim Sistemi (HÜAES)
- HÜAES, Hacettepe Üniversitesi bünyesinde üretilen kitap, makale, tez, bildiri, rapor gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
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Üniversite Öğrencilerinde Tek Başınalık Deneyiminin İncelenmesi
(Eğitim Bilimleri Enstitüsü, 2025) Özçelik Erdi; Eğitim Bilimleri
The aim of this study is to explore how university students experience solitude. The research was conducted using an exploratory sequential mixed methods design. The qualitative phase was based on a phenomenological approach and involved semi-structured interviews with 12 university students. The qualitative data were analyzed using thematic analysis, which revealed four main themes: determinants, intrinsic motivation, activities, and consequences. Based on the qualitative findings, the "Solitude Experience Scale" was developed and its validity and reliability were tested through exploratory and confirmatory factor analyses as well as reliability tests. During the scale development process, data were collected from a total of 1062 students across three different sample groups. In the quantitative phase, data were collected using the Solitude Experience Scale, DASS-21, Preference for Solitude Scale, Brıef Emotıonal Experıence Scale, Short Version of the Scales of General Well-Being, UCLA Loneliness Scale (ULS-8), Satisfaction with Life Scale and Personal Information Form. The quantitative data, collected from 800 university students, were analyzed using Pearson correlation coefficients, ANOVA, and structural equation modeling. The results showed that negative solitude significantly and positively predicted negative affect, loneliness, and depression, while positive solitude significantly and positively predicted positive affect, life satisfaction, and overall well-being. Additionally, in a model testing the combined effects of positive and negative solitude on depression, positive solitude significantly and negatively predicted loneliness, whereas negative solitude significantly and negatively predicted life satisfaction. The findings were discussed in light of the existing literature, and recommendations were offered for university students, researchers, psychological counselors, and policymakers.
Torus mandibularisin mandibular kortikal indeks ile ilişkisinin araştırılması
(Sağlık Bilimleri Enstitüsü, 2016) KOÇ, NAGİHAN; Çağırankaya, Leyla Berna; Ağız Diş ve Çene Radyolojisi
Torus mandibularis (TM) is one of the common oral exostoses with its specific anatomic location. The etiology of TM has been investigated by several authors; however, no consensus has been reached. Genetic factors and environmental factors such as masticatory stresses generally mentioned together in the etiology of the TM. In view of the previous studies have shown the relationship between presence of TM and high skeletal bone mineral density (BMD), it was suggested that TM may be an indicator of high BMD and an individual with TM might have a lower risk for future osteoporosis development. Conventional radiographs and digital imaging techniques can be used in the evaluation of the quality and quantity of the jawbone. In these methods, mandibular cortical index (MCI) is a simple measurement to determine bone quality in panoramic radiographs which is based on the classification of the radiographic image of the inferior mandibular cortex. It was claimed that MCI may be an indicator of skeletal BMD. The aim of this study was to investigate the relationship between TM and MCI as well as the etiology of TM. In our study, the data regarding age, gender, dental status, Eichner index (EI) was recorded and MCI measurements were made of 381 patients including 109 with TM and 272 without TM, who were randomly selected from the patients over the age of 20. Bruxism awareness has been studied using questionnaires of 268 patients. The result of our study demonstrated that presence of TM is associated with age, EI, diurnal bruxism and MCI furthermore logistic regression analysis revealed that the factors identified as being affected on MCI were age, gender, EI and TM.
CAD-CAM Tam Seramik Materyallerin Renk, Translusensi ve Pürüzlülükleri Üzerine Polisaj ve Glaze Işlemlerinin Etkisinin Değerlendirilmesi
(Sağlık Bilimleri Enstitüsü, 2020) Kamacı Ergül, Sena; Altıntaş, Süleyman Cumhur; Protetik Diş Tedavisi
Kamaci Ergül S., Evaluation of the Effect of Polishing and Glaze Techniques on the Color, Translucency and Surface Roughness of CAD-CAM AllCeramic Materials, Hacettepe University Faculty of Dentistry, Prosthetic Dentistry Program Specialization Thesis, Ankara, 2020. The purpose of this study is to evaluate the influence of different surface treatments (Glaze: G and Polishing: P) on the translucency, color stability and surface roughness of LDS (Lithium disilicate), ZLS (Zirconia reinforced lithium silicate) and TrZ (translucent zirconia) materials. 40 specimens (1 mm thickness) discs were prepared from lithium disilicate (IPS e.max CAD), zirconia reinforced lithium silicate (Celtra Duo HT) and translucent zirconia (Cercon HT) materials. Specimens were grinded in order to mimic the chairside-adjustment process for 20 seconds. Two different types of surface treatments (glazing or polishing) were applied to the specimens and the specimens were subjected to 10.000 thermocycles in a coffee solution. Contact profilometer was used to measure the roughness values (Ra: Average Roughness Value, Rz: Maximum Height of Profile), and colorimeter was used to measure color stability and translucency parameters (TP). Color difference data were evaluated with Kruskal Wallis test and Dunnet multiple comparison test. Oneway variance analysis (ANOVA) was used to evaluate the roughness data after grinding. Repeated measures ANOVA and Duncan multiple comparison test was used to evaluate the roughness (Ra, Rz) and translucency parameter (TP) data. p<0.05 was considered significant. Only the ZLS-P (Zirconia reinforced Lithiumsilicate-polishing) group’s color differences was perceptible but the color differences values of all groups were smaller than the clinically acceptability threshold (<2.23). The highest roughness values (Ra and Rz) were observed in the ZLS material after grinding, followed by LDS and TrZ. ZLS-G (Zirconia reinforced Lithiumsilicate-glaze) and LDS-G (Lithium disilicate-glaze) groups showed the lower mean value Ra than polished groups, which showed no statistically significant difference among them. TrZ-G (Translucent Zirconia-glaze) group showed a significantly higher Ra value compared to TrZ-P (Translucent Zirconiapolishing) group. For all materials, glazing provided lower Rz (Maximum Height of Profile) value, but for TRZ no significant differences were found between the Rz values of glazed and polished surfaces. Before and after coffee thermocycling, LDS presented the highest TP values, followed by ZLS and TrZ. The coffee thermocycling increased the roughness values (Ra and Rz) and decreased the translucency of materials.
İLİAK KEMİK GREFTİ İLE REKONSTRÜKSİYON YAPILMIŞ HASTALARDA İMPLANT DESTEKLİ PROTEZ SONRASI KLİNİK İMPLANT BAŞARISI, AĞIZ SAĞLIĞI ETKİ PROFİLİ (OHİP-14) VE HASTA MEMNUNİYETİ DEĞERLENDİRİLMESİ
(Sağlık Bilimleri Enstitüsü, 2020-09-22) Tanır, Kardelen Öykü; Tosun, Emre; Ağız Diş ve Çene Cerrahisi
Reconstruction of severely atrophic jaws for rehabilitation with dental implants
is widely used in oral and maxillofacial surgery. Autogenous bone grafts are still
considered as the ‘gold standard’ because of its osteogenic and non-immunological
properties. The most common donor site for the augmentation of large bony defects is
the iliac crest.
Although the term of clinical success for dental implants is implied the dentist's
technical success and osseointegration of the implants, it does not include the
treatment’s effect on patients. In the recent years, the concept of oral health quality of
life and patient satisfaction become popular topics since they are patient- oriented
assessments and the success criteria for implants.
The aim of this study is to assess the quality of life of patients who had
reconstruction of severely atrophic jaws with anterior iliac crest and rehabilitation with
dental implants and implant supported prosthesis by using the OHIP-14 scale. Level
of satisfaction of the patients related to the whole treatment process was also
determined with Likert-type questions and the periodontal health status of patients
was evaluated with periodontal indices.
The results of this study showed that, reconstruction of severely atrophic jaws
with anterior iliac crest and rehabilitation with dental implants and implant supported
prosthesis have positive effects on quality of life; this effect has increased over time.
It was observed that the satisfaction levels of the patients related to this procedure were
high and their expectations regarding this treatment were met at high levels. When
periodontal health status is evaluated, relationship between plaque index and gingival
index values were statistically significant. There was an increase in pocket depth as
these values increase. Both index values were higher in men population, advanced age
group, smoker group, and the implants placed in posterior regions. A significant
increase in pocket depths was observed in male patients and in the implants placed in
posterior regions.
CAD/CAM Sistemi İle Üretilen Hibrit Seramik İnley ve Onley Restorasyonların Adezyonunda Farklı Rezin Simanların Etkisinin Klinik Olarak Karşılaştırılması
(Sağlık Bilimleri Enstitüsü, 2020) Canatan, Simge; Bolay, Şükran; Restoratif Diş Tedavisi
The purpose of this clinical study is to evaluate the clinical comparison of two different adhesive resin cements, which have different content and application methods in the cementation of inlay/onlay restorations produced from hybrid ceramic using the CAD/CAM system. For this purpose, after the approval of Hacettepe University Clinical Studies Ethics Committe, 70 inlays/onlays were produced from Cerasmart (GC, Tokyo, Japan) hybrid nanoceramic block using CEREC Omnicam (Sirona Dental, Bensheim, Germany). Each group was randomly divided into two groups, 35 of which were restorations. One group was cemented with RelyX U200 Automix (3M ESPE, Seefeld, Germany) self adhesive resin cement and the other group with G-Cem LinkForce (GC, Tokyo, Japan) etch and rinse adhesive resin cement to posterior vital teeth. Each restoration was clinically evaluated at 6, 12 and 18 months using modified USPHS criteria were also evaluated by two physicians calibrated. SPSS 23.0 program was used in the statistical analysis of the data. The comparisons were made using the Chi-square (χ2) test and Friedman test. In terms of modified USPHS criteria all restorations were clinically acceptable. The survival rate for RelyX U200 Automix self adhesive resin cement was evaluated %94.3 and the survival rate for G-Cem LinkForce etch and rinse adhesive resin cement was evaluated %91.4. No statistically significant difference was found between the clinical performances of both cements. After 18 months, both cement systems showed similar clinical performance in the cementation of inlay/onlay restorations produced from hybrid ceramic using the CAD / CAM system to the vital posterior teeth.