Objective The aim of this randomized controlled study was to investigate the effect of music therapy during restorative dental treatments on patients with moderate dental anxiety. Materials and methods Seventy patients were determined to have moderate dental anxiety by the Modified Dental Anxiety Scale (MDAS) and were divided randomly into two groups (n = 35). The first group did not listen to music during their restorative treatment (control group), and the second group listened to music of their choice (experimental group). Systolic blood pressure, diastolic blood pressure, heart rate, oxygen saturation, and body temperature were measured three times for each patient: once before the treatment, once after their dental caries were removed, and once at the end of the treatment. Salivary cortisol samples were taken from each patient before and after the treatment. The MDAS was re-administered to the patients at the end of the treatment, and the data were analyzed statistically. Results Only the diastolic blood pressure (P = 0.042) and the MDAS scores of the experimental group (P = 0.001) were significantly lower than the control group at the end of the treatment. Conclusion While music listening did not have an effect on the physiologic parameters of the patients during restorative treatment, it decreased the MDAS scores of the patients. Clinical relevance Although music therapy did not affect the physiological parameters during the restorative dental treatment, it may help to reduce patients' self reported anxiety level.

Aim: Although the shelf life is a key property of dental composites and bonding agents, these materials may often be used in simple procedures after expiration. In this study, the microleakage of two year expired and non-expired dental composites (Filtek Ultimate Universal A2 Enamel, 3M ESPE, USA, and Tetric N Ceram A2, Ivoclar Vivadent, Schaan, Liechtenstein) and a universal bonding system (Single Bond Universal, 3M ESPE, USA) was examined. Materials and Methods: In 40 freshly extracted human molars, two standardized Class II cavities (buccolingual and mesiodistal width of 3 mm and 4 mm, respectively) were prepared (80 cavity preparations). The teeth were thermocycled in distilled water for 1000 cycles in a 5°C to 55°C water bath. Next, the teeth and their apical foramens were coated with water resistant nail varnish, except for 1 mm around the restoration–tooth interface, and retained in a 1% methylene blue solution. After 24 h, the specimens were cut into two halves and analyzed using a stereomicroscope. Scanning electron microscopy images of two samples of the groups were obtained. Results: The Kruskal–Wallis test indicated no significant differences between the groups ( P < .05). The occlusal median scores were not significant ( P = .99). Moreover, the gingival median scores were not significant ( P = .48). No difference was found between the occlusal and gingival values in any group ( P > .05). Conclusion: These findings indicated that two-year-expired dental composites and bonding agent, which were maintained under proper conditions, do not have any significant difference in terms of the microleakage.

Aim: The aim of this study was to evaluate the effect of additional finishing and polishing sequences on a new structural colored (Omnichroma) and a conventional dental composite (Estelite Sigma Quick). Materials and Method: Forty disk-shaped dental composite specimens were prepared from each dental composite and assigned to four groups in terms of additional finishing polishing sequences. Group 1: Mylar strip (control). Group 2: Abrasive disks. Group 3: After abrasive disks, application of a felt brush with abrasive paste. Group 4: After abrasive disks, application of a felt brush with abrasive paste. Then, a single-bottle adhesive was applied as a surface sealer. Hardness and surface roughness were measured using the Vickers hardness test and a profilometer, respectively. SEM images of one of each group were captured at 500x, 1500x, and 3500x magnifications. Two-way analysis of variance, Tukey HSD, and Shapiro–Wilk tests were used for the statistical analysis. Results: Mean hardness values differ in terms of finishing-polishing sequences ( P < .001), dental composites ( P < .001), and interaction of finishing-polishing sequences-dental composites ( P < .001). Mean roughness values differ in terms of finishing-polishing ( P = .002). The main effect of composites on roughness values was not found statistically significant ( P = .990). Also, there is no difference between the mean roughness values in terms of the interactions of finishing-polishing and composites ( P = .967). Conclusion: Finishing-polishing with abrasive disks and abrasive paste are important steps for these dental composites. However, the application of a single-bottle adhesive as a surface sealant on these composites decreases the hardness of the materials.

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Genellikle estetik problemlere sebep olan orta hat diastemalarına sıklıkla rastlanılmaktadır. Pek çok tedavi seçeneği bulunsa da direkt kompozit rezinlerle restorasyonu sıklıkla tercih edilmektedir. Diastema kapatılmasında direkt kompozit rezinler noninvaziv bir yöntemdir. Kısa sürede tamamlanan restorasyonların diğer estetik tedavi seçeneklerine göre pahalı olmaması ve tatmin edici estetik sonuçlar vermesi bu tedavi seçeneğinin sıklıkla tercih edilmesine yol açmaktadır. Bu olgu raporunda orta hat diasteması bulunan iki vakanın kompozit rezinlerle direkt restorasyonu tamamlanmıştır. Tedavi bitiminde elde edilen memnun edici sonuçlara ilave olarak yapılan 18 aylık kontrollerde herhangi bir probleme rastlanılmamıştır. Orta hat diastemalarının dental kompozit rezinlerle direkt olarak kapatılmasında uzun süreli memnun edici sonuçlar elde edilmektedir. Anahtar Kelimeler: Kompozit dental rezin; dental estetik; diyastem.