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KORKUT, BORA

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    PublicationOpen Access
    Two-year retrospective evaluation of monoshade universal composites in direct veneer and diastema closure restorations
    (2022-01-01) KORKUT, BORA; KORKUT B., Ünal T., Can E.
    © 2022 Wiley Periodicals LLC.Objectives: The aim of this retrospective evaluation was to assess the short-term outcome of two monoshade universal resin composites with high chameleon effect in anterior direct veneer and diastema closure restorations, and to investigate the possible reasons for failure. Material and Methods: Patients subjected to veneer and diastema closure restorations with two monoshade universal resin composites (Essentia Universal Shade; EU, GC Corp., and Omnichroma; OC, Tokuyama) operated between January 2018 and March 2019 were selected for the present retrospective evaluation. A total of 159 composite restorations (78 veneers and 81 diastema closure restorations) performed by a single operator in 44 patients (mean age: 33.6) were included in the study. Two blinded and calibrated examiners performed 1- and 2-year assessments of the restorations with respect to FDI criteria, using medical/clinical history and dental photography records. Data were analyzed using Pearson Chi-square with Continuity Correction, Fisher\"s Exact tests, and Cox regression (a < 0.05). Results: The cumulative overall survival rates of EU and OC restorations were 94.6% (97.3% for the first year) and 88.6% (95.3% for the first year), respectively, with no significant difference from each other (p = 0.316). The cumulative overall survival rates of direct veneer and diastema closure restoration types were 90.2% (95.1% for the first year) and 92.4% (97.4% for the first year), respectively, with no significant difference (p = 0.559). The reasons for failure were evaluated as fracture of the restoration, failure in esthetic anatomical form, and color mismatch. All the failed direct veneer restorations were due to fractures (FDI score of 5.4), whereas 5 of 6 failed diastema closure restorations were due to color mismatch (FDI score of 3.4). Regarding the composite materials, there were no significant differences between the success rates of the restoration types (p = 0.442 for EU, p = 1.000 for OC). With respect to the restoration types, there were also no significant differences between the success rates of the resin-based composites (p = 1.000 for direct veneer restorations and p = 0.228 for the diastema closure restorations). In addition, no significant difference was observed between male and female patients regarding the acceptable and unacceptable scores (p = 1.000). Conclusions: The 2-year clinical performance of the two monoshade universal composites in anterior veneer and diastema closure restorations were both considered successful and similar. Despite the lack of shade selection, both monoshade universal composites presented a successful color match. However, the diastema closure restorations might be more prone to color mismatch compared to the veneers over time, while veneer restorations presented more fractures than the diastema closure restorations. Clinical Significance: Monoshade universal composites presented successful short-term clinical outcomes regarding both function and esthetics in anterior direct veneer and diastema closure restorations.
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    PublicationOpen Access
    Effect of prerestorative short-term clear aligner therapy in restorative treatment planning
    (2023-05-01) KORKUT, BORA; Korkut B., Unal T., Murat N., Özcan M.
    Statement of problem. One of the major challenges in restorative dentistry is to provide optimal esthetics in a minimally invasive way. The optimization of dental esthetics and function is directly related to the position and alignment of the anterior teeth, but whether prerestorative clear aligner therapy will enhance esthetics and minimize restorative needs is unclear. Purpose. The purpose of this clinical study was to evaluate the effect of prerestorative maxillary and mandibular second premolar to second premolar clear aligner therapy in minimizing the need for restorative treatment. Material and methods. Fifty adult patients treated with clear aligners (Invisalign Go; Align Technology) were included in this study. Previously generated 3-dimensional orthodontic simulations and clinical photographs in the ClinCheck/6.0 software program were used. Three restorative treatment plans for each participant were generated for initial (no aligners), Express (after using 7 aligners), and Lite Packages (after using 20 aligners) by 2 blinded restorative dentistry instructors. The maxillary and mandibular teeth in the smile-line (to the second premolars) were included. Assessment criteria were the estimated number of restorations, restoration surfaces and preparations and incisal edge inclusion, and the need for gingival leveling. The Friedman test and Cochran Q test were used for statistical analyses (a=.05). Results. A strong positive correlation was found between the 2 instructors (P<.001). Estimated number of restorations (10 [3 to 16]a ) decreased significantly for Express (6 [0 to 14]b ) and Lite Packages (4 [0 to 8]c ) (P<.001). The estimated number of restoration surfaces (28.5 [9 to 48]a ) decreased significantly for Express (15 [0 to 42]b ) and Lite Packages (9.5 [0 to 24]c ) (P<.001). While the estimated number of teeth to be prepared for recontouring (7 [0 to 16]a ) was significantly less for Express (3 [0 to 10]b ) and Lite Packages (0 [0 to 4]c ) (P<.001), the incisal edge inclusion (10 [3 to 16]a ) was significantly less for Express (6 [0 to 14]b ) and Lite Packages (4 [0 to 8]c ) (P<.001). The need for gingival leveling (26 [52%]a ) decreased significantly for Express (20 [40%]a ) and Lite Packages (7 [14%]b ) (P<.001). Conclusions. Prerestorative short-term clear aligner therapy might conserve tooth structure and reduce the number of restorations. The application of the Invisalign Lite Package was more effective than the Invisalign Express Package for second premolar to second premolar alignment. (J Prosthet Dent 2023;-:---)
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    PublicationOpen Access
    Romanian dental students’ learning experience related to lifestyle changes imposed by Covid-19 lockdown
    (2023-03-01) KORKUT, BORA; Bud M., Pricope R., Pop R., Korkut B., Lucaciu O., Sanda S., Delean A.
    Background and aim. The SARS-CoV-2 outbreak in Romania was followed by the declaration of an Emergency State and the subsequent lockdown. As all the schools and universities ceased onsite activities, the teaching process continued exclusively online, on different platforms, such as Microsoft Teams or Zoom. Objectives. The aim of this cross-sectional study is to evaluate how the lifestyle changes imposed by the Covid-19 lockdown and online lectures influenced the learning experience of Romanian dental students, as their point of view could bring new information which might contribute to improving the teaching process. Methods. The questionnaire had 28 items, each with either a Likert Scale or a multiplechoice option and was distributed in April 2020, one month after implementation of circulation restrictions and social distancing. Results. Compared to classical teaching, we found that the online teaching process had a lower efficiency, with a higher satisfaction level for online courses, but lower for online practical teaching activities. The absence of human interaction was found to be detrimental to the teaching process. Conclusion. Despite the lower efficiency of online learning, it was a good alternative that helped students continue their education in the situation created by the outbreak of Covid-19. For higher learning efficiency, a compromise method consisting of online courses and onsite practical training could be a better alternative.
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    PublicationOpen Access
    Tarihi geçmiş kompozit rezinleri kullanmak mümkün mü? : Ftır analizi
    (2023-02-01) DOĞU KAYA, BENGÜ; ŞENOL, AYŞE ASLI; KORKUT, BORA; TARÇIN, BİLGE; YILMAZ ATALI, PINAR; ÖZMEN, SEDA; Özmen S., Doğu Kaya B., Şenol A. A., Korkut B., Tarçın B., Yılmaz Atalı P.
    Bu çalışmanın amacı; son kullanma tarihleri 1 yıl, 2 yıl ve 3 yıl geçmiş rezin kompozitlerin (RK) dönüşüm derecelerini karşılaştırarak kullanımlarındaki güven aralığını değerlendirmektir. Materyal ve Metod: Üç farklı RK'den (Herculite XRV-Ultra A2-dentin, son kullanma tarihi 3 yıl ve 1 yıl geçmiş; Herculite Classic A2, son kullanma tarihi 2 yıl geçmiş; Kerr) 9 adet disk (8 x2 mm) hazırlandı (n=3). RK silikon kalıplara yerleştirildi, her iki tarafı şeffaf bantlar ile kapatıldı ve LED ışıklı cihaz ile (Valo, Ultradent) ile 20 sn parmak basıncı altında polimerizasyonu takiben numuneler 37°C'de 24 saat distile suda bekletildi. Dönüşüm derecesini (%DC) belirlemek için Fourier Dönüşümü Kızılötesi Spektrometre (FT-IR, JASCO) ile örnekleme kullanılarak polimerize olmuş ve olmamış kompozitler üzerinde spektral analizler yapıldı. Ortaya çıkan FT-IR spektrumu, 20 °C ortam sıcaklığında 4000–400 cm-1 spektral aralığında kaydedildi; kullanılan çözünürlük dört tarama ile 4 cm-1 ’dir. Veriler SPSS (SPSS Inc.) ile tek yönlü varyans analizi (ANOVA) ve Tukey testleri kullanılarak analiz edildi. Anlamlılık düzeyi p<0,05 olarak alındı. Bulgular: En yüksek ortalama %DC, 1 yıllık son kullanma tarihi geçmiş RK grubu için kaydedilirken (H-6: 68,80 ± 4,544), bunu 2 yıllık son kullanma tarihi geçmiş RK grubu (H- 12: 68,268 ± 2,695) takip etmiştir. En düşük ortalama %DC 3 yıl üstü RK grubu için kaydedilmiştir (H-24: 68.032 ± 4.641). Üç grup arasında %DC değerleri açısından istatistiksel olarak anlamlı bir fark bulunmadı (P=0,096). Sonuç: Bu çalışmanın sınırları dahilinde; son kullanma tarihleri üzerinden 1, 2 ve 3 yıl geçmiş kompozitler benzer %DC sonuçları gösterdi. Klinisyenlerin, üreticiler tarafından önerilen son kullanım tarihi talimatlarını takip etmeleri gerekmektedir.