Bölüm "İstanbul Medipol Üniversitesi, Diş Hekimliği Fakültesi, Restoratif Diş Tedavisi Ana Bilim Dalı" seçeneğine göre listele
Listeleniyor 1 - 20 / 71
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe 3D-printed resin composite posterior fixed dental prosthesis: a prospective clinical trial up to 1 year(2024) Hobbi, Paniz; Ordueri, Tuğçe Merve; Öztürk Bozkurt, Funda; Toz Akalın, Tuğba; Ateş, Muzaffer; Özcan, MutluObjectives: This clinical trial evaluated the clinical behavior of 3D-printed posterior resin composite fixed dental prostheses (FDPs). Materials and methods: Between 10 October 2020 and 5 August 2022, 49 patients aged 19–60 years (16 men, 33 women) received 68 3D-printed resin composite 3-unit posterior FDPs (ELS Even Stronger, Saremco, Switzerland). FDPs were followed up 2 weeks after placement (baseline), 6 months after placement, and 1 year after placement by two independent calibrated observers using modified FDI criteria for anatomical form, secondary caries, marginal adaptation, surface roughness, color match, fracture of material, staining surface, staining margin, approximate anatomical form, retention, gingival health, and patient's view. Survival analyses were performed using Kaplan–Meier analyses. Results: A total of 59 restorations were evaluated and the mean observation period was 8.63 months. Failure types were categorized as mechanical and biological. Failures were observed in 14 FDPs. Nine FDPs showed mechanical failure and five FDPs showed biological failure. Mechanical failures were mostly experienced as connector fractures. Eight FDPs showed cohesive fractures (seven in a single connector at either at the mesial or distal and one in the pontic itself). Biological failures, including root canal treatment and gingival tissue reactions, were observed within the first 6 months. Based on mechanical failures, the survival rate was 86.7% including the biological complications; this corresponded to 71.6% (Kaplan–Meier). After 1 year, two FDPs showed surface luster loss (score 4), two-color mismatches (score 4), and two-surface staining (score 4). Conclusion: 3D-printed resin composite FDPs were observed acceptable after 1 year of clinical follow-up, providing that the experienced failure types were mainly associated with fractures in the connector region, which requires revision of design parameters.Öğe A comparative study on monomer elution and cytotoxicity of different adhesive restoration materials(Taylor & Francis Ltd, 2017) Toz, Tuğba; Kiremitçi, Arlin; Çakmak, Anıl Sera; Ünsal Tan, Oya; Palaska, Erhan; Gümüşderelioğlu, Menemşe; Özcan, MutluThis study evaluated monomer release and cytotoxicity of different adhesive restoration materials used for dental restorations. The extracts (1, 2, and 7days) of three types of adhesive dental restoration materials, [Quixfill (QF), Silorane Restorative (SR), and Ketac N 100 Restorative (KR)], and the adhesive resins, [XP Bond (XP), Silorane Primer (SP), Ketac N 100 Primer (KP), and Silorane Bond (SB)] were analyzed using high performance liquid chromatography/mass spectrometry (HPLC-MS). The cytotoxicity levels were determined at different time points (24, 48, and 72h) of cell culture using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H tetrazolium bromide (MTT) assay. All adhesive resin materials showed monomer release at varying amounts with the highest release after 7days. The lowest amount of release was observed in QF and the highest with KP. Bis-Phenol A (BPA) was not detected in SP and KR that contain bisphenol-A diglycidyl ether dimethacrylate (bis-GMA). Decamethylpenthasiloxane (D5) was not eluted from SR. Except for SR and QF, all other adhesive restoration materials showed different degrees of toxicity along with different monomer release kinetics. The correlation between the monomer release and cytotoxicity of the materials indicated that the cytotoxicity of the materials increased with the monomer release (Spearman's rho correlation coefficient - r). The correlation after 48h was statistically significant (r=-0.342, p=0.017).Öğe Antimicrobial activity of sapindus mukorossi and saponaria officinalis extracts on streptococcus mutans and enterococcus faecalis(2021) Eren, Meltem Mert; Dikmen, Benin; Vatansever, Cansu; Servi, Hüseyin; Yeğin, Hulki Caner; Ozan, GünceAim: Studies on the antimicrobial effectiveness of saponins against oral pathogens are conflicting. Therefore, this study aimed to evaluate the antimicrobial activity of saponins from three different extracts of Sapindus mukorossi and Saponaria officinalis plants against Streptococcus mutans and Enterococcus faecalis. Materials and Methods: The fruit of Sapindus mukorossi and the root of Saponaria officinalis materials were sliced into small pieces and macerated with hexane, ethyl acetate (EtOAc) and methanol (MeOH), in this order. The antimicrobial activity of the extracts against Streptococcus mutans and Enterococcus faecalis was determined by the broth microdilution method based on the minimum inhibitory concentrations (MIC) of each extract. Results: Except for the hexane extract of Saponaria Officinalis, all extracts of both plants had an inhibitory activity against the tested microorganisms. Higher MIC values were obtained against Enterococcus faecalis than Streptococcus Mutans. The lowest MIC values for both Sapindus mukorossi and Saponaria officinalis were against Streptococcus mutans (4 mg/ml). Conclusion: Saponins extracted from Sapindus mukorossi and Saponaria officinalis have a potential antibacterial activity against oral pathogens. They may be used as an ingredient in dental agents.Öğe Bir diş hekimliği fakültesi öğrencilerinin hepatit B, hepatit C, HIV seroprevalanslarının ve hepatit B enfeksiyonu ile ilgili bilgi düzeyi, tutum ve davranışlarının değerlendirilmesi: Kesitsel klinik araştırma(Turkiye Klinikleri, 2022) Çukurova Yılmaz, Zeynep; Altaş, Nurcan; Gözetici Çil, BurcuHepatit B virüsü (HBV) enfeksiyonu, toplumumuzda yaygın olarak görülen ve dental işlemler yoluyla diş hekimlerinden hastalara ya da hastalardan diş hekimlerine bulaşabilen bir viral enfeksiyondur. Bu çalışmada, diş hekimliği fakültesi 4 ve 5. sınıf öğrencilerinin HBV enfeksiyonu ile ilgili bilgi düzeylerinin, bu konudaki tutum ve davranışlarının değerlendirilmesi amaçlandı. Buna ek olarak, yüksek bulaşıcılık oranına sahip HBV, hepatit C virüsü (HCV) ve insan immün yetmezliği virüsü [human immunodeficiency virus (HIV)] seroprevalansları değerlendirildi. Gereç ve Yöntemler: Bu kesitsel klinik araştırmada, gönüllülere demografik bilgiler, HBV hakkındaki bilgi düzeyleri, tutum ölçeği ve davranış ölçeği olmak üzere 4 bölümden oluşan çevrim içi anket uygulandı. Öğrencilerin HBV, HCV ve HIV seroprevalanslarının değerlendirilmesinde ise ELISA testi kullanıldı. Bulgular: 4. Sınıf öğrencilerinin bilgi düzeyi skorları ile tutum puan ortalamaları arasında istatistiksel olarak anlamlı farklılık gözlendi (p=0,0001). Bilgi düzeyi yüksek olan öğrencilerin tutum puanı ortalamaları, bilgi düzeyi orta olan öğrencilerden istatistiksel olarak anlamlı derecede yüksek bulundu (p=0,0001). 4. Sınıf öğrencilerinden bilgi düzeyi düşük olan öğrencilerin davranış puanı ortalamaları, bilgi düzeyi orta ve yüksek olan öğrencilerden istatistiksel olarak anlamlı derecede düşük bulundu (p=0,012, p=0,001). 5. Sınıf öğrencilerinin ise bilgi düzeyi, tutum ve davranış puan ortalamaları arasında istatistiksel olarak anlamlı farklılık gözlenmedi (p=0,156, p=0,574). Sonuç: HBV genel bilgi seviyesi ve serolojik test sonuçları yeterli düzeyde görünse de kliniğe yeni başlayan 4. sınıf öğrencilerinden HBV enfeksiyonu hakkında bilgi düzeyi düşük olanların tutum ve davranışlarının daha yetersiz olduğu görüldü. Bu sonuç, sürekli enfeksiyon kontrolü eğitiminin gerekliliğini vurgulamaktadır.Öğe Bir oksalat hassasiyet gidericinin uzun dönem bağlanma dayanımı üzerine etkisi(2016) Toz Akalın, Tuğba; Kiremitçi, Arlin; Gökalp, Saadet; Yenen, ZeynepAmaç: Bu in vitro çalışmanın amacı bir oksalat hassasiyet gidericinin, farklı adeziv prosedürlerle dentin dokusuna uygulanan bir rezin kompozitin uzun dönem bağlanma dayanımı (3 yıl) üzerine etkisinin değerlendirilmesidir. Gereç ve Yöntemler: Kırk adet çekilmiş insan molar dişi bukkal yüzeyleri açıkta kalacak biçimde, akrilik bloklara yerleştirilmiştir. Dişlerin bukkal yüzeyleri, düzgün dentin yüzeyi elde edilene kadar aşındırılmıştır. Örnekler, rastgele dört gruba ayrılmıştır (n=10). Grup 1: %32 fosforik asit (Uni-etch), Oksalat hassasiyet giderici (BisBlock), asitle ve yıka adeziv (One Step Plus) uygulaması. Grup 2: Oksalat hassasiyet giderici, kendinden asitli adeziv (Tyrian Spe+One Step Plus) uygulaması. Grup 3: %32 fosforik asit, asitle ve yıka adeziv uygulaması. Grup 4: kendinden asitli adeziv uygulaması. Yüzey hazırlığı işlemlerinin ardından, dentin yüzeylerine yerleştirilmiş teflon tüpler (4x2 mm) hibrit rezin kompozit (TPH Spectrum) ile doldurulmuştur. Distile suda 3 sene süren bekleme periyodunun ardından örneklere, makaslama bağlanma dayanım testi uygulanmıştır. Veriler, Kruskall-Wallis testi ve Conover metodu ile istatistiksel olarak analiz edilmiştir. Bulgular: Kendinden asitli adeziv öncesi uygulanan oksalat hassasiyet giderici (Grup 2) bağlanma dayanımını istatistiksel olarak anlamlı derecede düşürmüştür (p<0,05). Grup 1, Grup 3 ve Grup 4 arasında istatistiksel olarak anlamlı bir farklılık gözlenmemiştir. Sonuç: Oksalat hassasiyet giderici uygulaması kendinden asitli adezivlerin dentin dokusuna uzun dönem bağlanma dayanımını negatif olarak etkileyebilir.Öğe Bulk-Fill materyali ile restore edilen dişlerde çeşitli kavite dezenfektanlarının rezin-dentin bağlantısına etkisi(İstanbul Medipol Üniversitesi Diş Hekimliği Fakültesi, 2017) Çalışkan, Pelin; Özsoy Kaner, AlevBu c?alıs?manın amacı, Bulk-fill materyali ile restore edilen dis?lerde c?es?itli kavite dezenfektanlarının 24 saat, 6 ay ve 12 aylık su?relerin sonunda, dentine bag?lanma dayanımlarının zamana bag?lı olarak deg?is?imini mikrogerilim bag?lanma testi ile incelemektir. C?alıs?mamızda 90 adet son 2 ay ic?inde c?ekilmis? molar dis?ler kullanılmıs?tır. Dis?lerin yarısı c?u?ru?klu? yarısı c?u?ru?ksu?z olup dis?ler distile suda bekletilmis?tir. Dis?lerin tu?mu?nu?n okluzal mineleri Mecatome T180 (PRESI, Grenoble. France) cihazı ile kaldırılmıs? ve du?z bir dentin yu?zeyi elde edilmis?tir. Smear tabakası olus?turmak amacıyla du?z dentin yu?zeyleri 60 saniye boyunca 600 grit SIC ile muamele edilmis?tir. Dis?ler c?u?ru?klu? ve c?u?ru?ksu?z olarak iki gruba ve alt grup olarak 3er gruba ayrılmıs?tır. Kavite dezenfektanları uygulandıktan sonra elde edilen du?z dentin yu?zeyleri u?zerine 4 mm kalınlıg?ında Bulk fill kompozit materyali tek seferde uygulanacak s?ekilde yerles?tirilmis?tir. Tu?m gruplar 24 saat, 6 ay ve 12 aylık su?relerle 37 °C distile suda etu?vde bekletilmis?tir. O?rneklerin bekletildig?i distile su periyodik olarak her hafta deg?is?tirilmis?tir. Her grupta 5 dis? olacak s?ekilde 18 grup elde edilmis?tir. O?rnekler Mecatome T180 (PRESI, Grenoble, France) cihazında dentin c?ubukları s?eklinde (1 mm2 ± 0,2 mm2 ) kesilerek Micro Tensile Tester (BI?SCO Inc. Schaumburg, IL, 60193, USA) cihazında gerilme kuvvetlerine kars?ı direnc?leri ic?in test edilmis?tir. C?apraz bas?lıg?ın hızı 0,5 mm/min olarak ayarlanmıs?tır. Kopma sonucunda ortaya c?ıkan bag?lanma dayanım deg?erleri istatiksel olarak kars?ılas?tırılmıs?tır.Öğe Can different polymerization times affect the surface microhardness, water sorption, and water solubility of flowable composite resins?(University Federal de Uberlandia, 2023) Kazak, Mağrur; Köymen, Safiye Selin; Dönmez, NazmiyeThis in vitro study evaluated and compared the effects of different polymerization times on the surface microhardness, water sorption, and water solubility of flowable composite resins. Three flowable composite resins [Es Flow (ESF), IGOS Flow (IGF), Estelite Flow Quick (EFQ)] were tested in this study. Each flowable composite resin (n = 7) was polymerized in a disc-shaped mould (1x10 mm) with an LED light-curing unit (D Light Pro) for two different times (20 and 40 sec.). The top surfaces of all specimens were polished (Sof-Lex). The surface microhardnesses of the flowable composite resins were measured with a Vickers HMV microhardness tester. Water sorption and water solubility were calculated according to the ISO 4049 standard. One-way ANOVA and post hoc Tamhane, Dunnett, and Tukey tests were used in the statistical analyses. Pearson’s and Spearman’s rho correlation tests were used to assess possible correlations between the different variables. The results were evaluated with a significance of p<0.05. In terms of microhardness, a significant difference was found between materials at the same polymerizati on times (p<0.05). All materials showed water sorption of less than 40 µg/mm3 and water solubility of less than 7.5 µg/mm3 by following ISO 4049. The correlations among surface microhardness, water sorption, and water solubility showed that the differences were determined by the materials and the polymerization times. The physical properties of all flowable composite resin materials were enhanced after polymerization for twice the time recommended by the manufacturers.Öğe Clinical evaluation of 107 anterior teeth restored with direct nanofilled resin composite: Up to 32 months(2016) Toz Akalın, Tuğba; Kuşdemir, Mahmut; Gözükara Bağ, Harika; Özcan, MutluAim: This study evaluated the clinical performance of a nanofill resin composite in Class III and IV cavities.Materials and Methods: One hundred and seven Class III and Class IV restorations were performed with a nanofill resin composite. Restorations were evaluated using the modified USPHS/FDI criteria. The changes were analyzed using McNemar and Marginal Homogeneity and Kaplan-Meier tests.Results: Fourteen absolute failures were encountered resulting in a survival rate of 86.8% (Kaplan-Meier). Nanofill resin composite showed acceptable clinical performance up to 32 months of service.Conclusion: However color stability and retention decreased at the end of two year fol-low up instead of fractures.Öğe Clinical evaluation of low-shrinkage bioactive material giomer versus nanohybrid resin composite restorations: A two-year prospective controlled clinical trial(NLM (Medline), 2023) Toz Akalın, Tuğba; Öztürk Bozkurt, Funda; Kuşdemir, Mahmut; Özsoy, Alev; Yüzbaşıoğlu, Emir; Özcan, MutluThis study evaluated the clinical performance of low-shrinkage bioactive resin composite compared with a conventional nanohybrid resin composite. A total of 35 patients (18 males, 17 females; mean age: 29±9 years old) received, randomly, 35 pairs of fillings restored with either low-shrinkage bioactive material employing Giomer filler technology (Beautifil II LS, Shofu Inc, Kyoto, Japan) or conventional nanohybrid resin composite (Clearfil Majesty Posterior, Kuraray, Japan) in Class I and Class II cavities. Two operators made all the restorations using the corresponding adhesive resins: FL-Bond II (Shofu Inc) and Clearfil SE Bond (Kuraray), according to each manufacturer's instructions. Two calibrated operators evaluated the restorations two weeks after placement (baseline), at six months, and at one and two years using FDI criteria (Scores 1-5). Data were analyzed using the McNemar test (?=0.05). Mean observation time was 27.4 ± 4.1 months (min=20.8; max=33.7). In both groups, according to FDI criteria, the restorations were mostly rated with best scores (Score 1 or 2) for biological, functional, and optical parameters. For one filling in the group restored with nanohybrid resin composite, a small and localized secondary caries lesion was observed and monitored at the one- and two-year follow-ups. One restoration in the low-shrinkage Giomer restorative group was accepted as a failure due to retention loss. Over the two-year follow-up, both the Giomer and the nanohybrid resin composite restorations' performance was clinically acceptable.Öğe Clinical evaluation of silorane and nano-hybrid resin composite restorations in class ıı cavities up to 3 years(Operative Dentistry, Inc., 2016) Öztürk Bozkurt, Funda; Toz, Tuğba; Kara Tuncer, Aysun; Gözükara Bağ, Harika; Özcan, MutluIn this study, the clinical performance of a silorane-based resin composite (SC) vs a nano-hybrid resin composite (NHC) was evaluated in Class II cavities. From January 2012 to February 2013, a total of 29 patients (eight men, 21 women; mean age, 24 +/- 5 years) received 29 pairs of restorations using both SC (Filtek Silorane, 3M ESPE) and NHC (Filtek Z550, 3M ESPE) materials. Patients were followed until February 2015. One operator performed all restorations using the corresponding adhesive resins according to the manufacturers' instructions. Two calibrated independent examiners evaluated the restorations at one week, six months, and then annually using the modified United States Public Health Service (USPHS) criteria for anatomic form, marginal adaptation, color match, surface roughness, marginal discoloration, secondary caries, and postoperative sensitivity. Changes in the USPHS parameters were analyzed with the McNemar test (alpha=0.05). The mean observation period was 31.2 months. Marginal adaptation was the only parameter that showed a significant difference and was worse for SC than NHC (p=0.012). At the final recall, 17 restorations from the SC group and five from the NHC group received a score of 1 (explorer catches). These scores were significantly different between baseline and final recall for SC (p<0.001) but not for NHC (p>0.05). Both NHC and SC performed similarly in Class II restorations up to three years except for marginal adaptation, for which the latter demonstrated significant deterioration at the final recall compared with baseline.Öğe Clinical evaluation of sonic-activated high viscosity bulk-fill nanohybrid resin composite restorations in class II cavities: A prospective clinical study up to 2 years(Dennis Barber Ltd, 2018) Akalın Toz, Tuğba; Bozkurt Öztürk, Funda; Kuşdemir, Mahmut; Özsoy, Alev; Özcan, MutluThis study evaluated the clinical performance of a bulk-fill resin composite in class II cavities for up to 2 years. Class II restorations (N=111) were made using a nanohybrid bulk-fill resin composite (SonicFill, Kerr Corp.) and evaluated following 1 week after placement, at 6 months, and thereafter annually up to 2 years using the United States Public Health Service (USPHS) criteria. The changes were analyzed using the McNemar test and the Kaplan-Meier method. No secondary caries was observed until the final recall. One restoration underwent endodontic treatment after 2 months following the restorative procedure and was deemed a failure. The overall success rate was 99.1%. Colour match deteriorated from a score of 0 to 1 in eight restorations from baseline to 6 months and six restorations showed marginal staining at final recall. Bulk-fill resin composite (SonicFill) showed acceptable clinical performance through 2 years of service but colour match to the tooth started to show some deterioration within the first 6 months.Öğe Clinical outcomes of selective removal to soft dentin versus firm dentin for deep caries lesions: a randomized controlled trial up to 5 years(2024) Gözetici Çil, Burcu; Çetin, Tuba; Bittar, Ahmad; Özcan, MutluObjectives: This study aimed to compare the success of selective removal to soft dentine (SRSD) with or without calcium silicate (CS) and selective removal to firm dentine (SRFD) in permanent dentition. Materials and methods: Between November 2018 and March 2020, 165 posterior deep caries lesions in 134 patients were included in the study and randomly assigned into test (n = 101) and control (n = 64) groups. The control group (n = 46) received the treatment of SRFD with CS, while the test group was further randomized into two groups to receive SRSD with CS (n = 45) and SRSD without CS (n = 45). An additional group (PE) consisted of teeth with exposed pulps during caries removal (n = 29). The primary outcome of the study was to assess the vitality of the teeth based on clinical and radiographic examination after five years. The secondary outcome of the study was to evaluate the influence of baseline variables and CS application on treatment outcome. The success rates of different treatment strategies were compared (Pearson chi-squared and Log-rank tests). The impact of baseline variables and treatment strategies on failure and dentin bridge formation was analyzed using binary logistic regression model. Results: The success rate for SRSD with or without CS (94.1–100%) was significantly higher compared to SRFD (75.8%) and PE (81.8%) after five years (P = 0.012). Failure was less likely for premolars. Cavity type and depth had an influence on dentin bridge formation. Conclusion: A five-year follow-up in this study demonstrated better clinical outcome for SRSD with or without CS compared to SRFD technique, irrespective of age, pre-op sensitivity, cavity type, radiographic depth and activity of the caries. Application of CS after SRSD in deeper cavities provided better healing in terms of dentin bridge formation. Clinical relevance: SRSD might be more advantageous over SRFD for the management of deep caries lesions.Öğe Clinical performance of 3d printed resin composite posterior fixed dental prosthesis a permanent solution(2025) Hobbi, Paniz; Ordueri, Tuğçe Merve; Öztürk Bozkurt, Funda; Toz Akalın, Tuğba; Ateş, Mehmet Muzaffer; Özcan, MutluObjectives: This clinical trial aimed to evaluate the clinical outcomes of 3D-printed resin composite posterior fixed dental prosthesis (FDP) restorations. Materials and Methods: Between October 2020 and August 2022, 49 patients (33 females, 16 males, aged 19-60) received 68 3-unit 3D-printed resin composite posterior FDPs (ELS Even Stronger, Saremco, Switzerland). Follow-ups were conducted at baseline (2 weeks) by independent observers using modified FDI criteria, assessing anatomical form, marginal adaptation, surface roughness, color match, fracture, retention, and patient feedback. Fifty FDPs completed a 1-year follow-up, and 18 reached 2 years. Results: The mean observation period was 14.15 months. Failures were categorized as mechanical or bio-logical, with 19 FDPs failing: 14 mechanical (12 cohesive fractures) and 5 biological (3 needing endodontic treatment, 2 periodontal issues). Two FDPs were recemented. Three FDPs showed surface luster loss, color mismatches, and staining. The survival rate based on mechanical failures was 69.5%, dropping to 61.0% when including biological com-plications. Conclusions: After 2 years, 3D-printed resin composite FDPs demonstrated acceptable performance, with most failures due to fractures in the connector region, suggesting the need for design revisions.Öğe Clinical performance of indirect composite onlays and overlays: 2-year follow up(Taylor & Francis Ltd, 2016) Özsoy, Alev; Kuşdemir, Mahmut; Öztürk Bozkurt, Funda; Akalın Toz, Tuğba; Özcan, MutluThis prospective clinical trial evaluated the clinical performance of indirect onlay and overlay restorations made of resin composite. From January 2012 to March 2013, a total of 60 patients (36 males, 24 females; mean age; 34.4 +/- 10 years) received 67 posterior onlay/overlay restorations in the maxilla or mandible made of laboratory-processed indirect composite (Gradia, GC, Japan). Patients were followed until March 2015. Two operators luted all restorations adhesively (Variolink II). Two independent calibrated examiners evaluated the restorations at baseline (2weeks), 6 months, and then annually, during regularly scheduled maintenance appointments, using the modified USPHS criteria for anatomic form, marginal adaptation, color match, surface roughness, marginal discoloration, secondary caries, and postoperative sensitivity. The observation periods involved 4 recalls during 24 months. Changes in the USPHS parameters were analyzed with the Friedman and Bonferroni-adjusted Wilcoxon signed-ranks tests (=.05). The mean observation period was 24.1 months. All restorations assessed were clinically acceptable with alfa scores predominating. Two restorations failed due to severe pain and subsequent extraction during the observation period. Not the color match (p>.05) but marginal adaptation (p<.05), marginal discoloration (p<.05), and surface roughness (p<.05) showed a significant difference between the baseline and the 2-year recall. No secondary caries or fractures were observed until the final follow-up. The indirect composite tested demonstrated to be successful for posterior onlay and overlays but deteriorations in qualitative parameters were observed during the 2-year clinical service.Öğe Clinical performance of nanofilled and microhybrid direct composite restorations on endodontically treated teeth(Dennis Barber Ltd, 2019) Toz Akalın, Tuğba; Öztürk Bozkurt, Funda; Kara Tuncer, Aysun; Gözükara Bağ, Harika; Özcan, MutluThis study evaluated the clinical performance of direct restorations made of nanofilled and microhybrid resin composites in endodontically treated teeth. Twenty patients (11 males, 9 females; mean age: 34.2 +/- 10) that met the inclusion criteria received a total of 48 restorations. After employing etch-and-rinse adhesive system, one dentist placed all restorations using either a nanofilled (Filtek Ultimate) or microhybrid (Filtek Z250) resin composite. The restorations were clinically reviewed at baseline, 6 months, and up to 2 years using the modified United States Public Health Service (USPHS) criteria. The changes were analyzed using the McNemar test and marginal homogeneity tests (p< 0.05). The mean observation period was 17.4 months. With respect to color match, marginal adaptation, secondary caries, and surface texture, no significant differences were found between the two restorative materials (p> 0.05). Most restorations yielded alpha or bravo scores with respect to the evaluation criteria. Five restorations failed due to chipping up to 2 years (1 microhybrid at 6 m, and 3 at 2 years; 1 nanofilled at 2 y) and were repaired. One complete replacement and one extraction due to endodontic complications were needed for 2 microhybrid resin group at 2 years.Öğe Clinical research clinical performance of posterior indirect resin composite restorations with the proximal box elevation technique: A prospective clinical trial up to 3 years(Quintessence Publishing Co, Inc, 2024) Gözetici Çil, Burcu; Öztürk Bozkurt, Funda; Genç Çalışkan, Gencay; Yılmaz, Burcu; Aksaka, Nurcan; Özcan, MutluPurpose: The study evaluated the clinical performance of partial indirect resin composite (PIRC) restorations with "proximal box elevation" (PBE) placed in molars. Materials and Methods: Sixty-three patients received 80 posterior PIRC (SR Nexco, Ivoclar Vivadent) restorations. Large posterior defects with cuspal loss and deep cervical margins were included in the study. PBE was performed prior to preparation and impression making. Two independent observers evaluated the restorations using the FDI criteria (scores 1-5) for esthetic, functional, and biological properties. Patients were recalled at 6 months and 1, 2, and 3 years. Overall success rates were calculated (Kaplan-Meier analysis) and compared (log-rank tests) according to baseline variables. The impact of the baseline variables on the failure of the restorations was analyzed (multiple proportional Cox regression). Results: Seventy-nine (98.7%), 69 (88.4%), 66 (92.9%), 44 (86.2%) and 45 (91.8%) PIRCs completed their follow up at baseline, 6 months, and 1, 2 and 3 years, respectively. In total, 10 failures were observed: 5 with partial loss, 4 with material chipping, and one with secondary caries, yielding an overall success rate of 87.5% and a survival rate of 93.8%, with a mean observation time of 26.5 +/- 13.6 months. Conclusions: PIRCs with PBE demonstrated a high survival rate and satisfactory esthetic properties. Failure was less likely for PIRC restorations with partial cuspal coverage (onlay) compared to full cuspal coverage (overlay).Öğe Color change evaluation of three universal resin composites after storage in water: An in vitro study(SAGE Publications India Private Limited, 2022) Akgül, Sinem; Gündoğdu, CeydaAim: The aim of this in vitro study was to evaluate the color changes of three different universal resin composites after immersion in distilled water for one month. Materials and Methods: Omnichroma, Estelite Sigma Quick, and Filtek Universal Restorative were investigated. Ten disk shaped specimens (6 mm diameter, 2 mm thickness) were prepared according to the manufacturers' instructions for each material. After polishing, initial color measurements were taken followed by individual storage of the specimens in distilled water at 37 degrees C for one month when color measurements were repeated. The change in the color of each resin composites (Delta E-00) was calculated with a digital method, using the CIEDE2000 color difference formula. The data were analyzed using one-way ANOVA followed by Tukey post-hoc test (P < .05). Results: All resin composites exhibited acceptable color change after one month. Omnichroma exhibited the highest color change (2.26 +/- 0.48) value while Filtek Universal Restorative showed the lowest (1.14 +/- 0.38) value. All color parameters influenced the Delta E-00 values in all groups except Filtek Universal for Delta L* and Delta b, values. Conclusion: When performing composite resin restorations, especially for esthetic purposes, polymerization may lead to change in the color of restorative material over time, but it should be considered whether this is within acceptable limits.Öğe Color stability and surface roughness of a laboratory-processed composite resin as a function of mouthrinse(Wiley, 2015) Cengiz, Seda; Yüzbaşıoğlu, Emir; İnanç Cengiz, Murat; Velioğlu, Neslin; Sevimli, GayeStatement of the Problem: Mouthrinses can cause discoloration on indirect resin composites. Purpose of the Study: The purpose of the study was to investigate the effect of different mouthrinses on the color changes and surface roughness of a laboratory-processed composite. Methods and Materials: Fifty discs were made using GC Gradia/GC indirect composites and divided into five groups which immersed in artificial saliva and four different types of mouthrinses. The samples were immersed daily for 14 days in 20 mL of the solutions for 2 minutes twice a day (with a 12-hour interval between exposures). Measurements were carried out at four different times: 1 hour after sample preparation (t(0)), 1 day (t(1)), 7 days (t(2)), and 14 days (t(3)) after the first immersion in the solutions. The color before and after immersion was measured according to Comission Internationale de L'Eclairage (CIE L*, a*, b*) System and Delta L*, Delta a*, Delta b*, and Delta E* values were calculated. The surface roughness Ra (mu m) of the specimens was evaluated using a profilometer. Results: There were significant differences between the groups at all time representing Delta E values (p < 0.001). At (t(1)) time representing Delta Ra value, there were significant differences between the groups (p < 0.05). At (t(2), t(3)) time representing Delta Ra values, there were significant differences between the groups (p < 0.001). Pharmol Zn immersed specimens showed Delta E values between 1.04 and 3.67. Conclusions: The result of this study indicated that the mouthrinses affected the color stability of indirect composites. CLINICAL SIGNIFICANCE Based on the results of this study, patients with resin composite restorations should be warned by the dentists about the discoloration of the restorations and the time period of the mouthrinse that will be used.Öğe Color stability of bulk fill composites immersed in different drinks(Wiley, 2018) Erdemir, Uğur; Kaner Özsoy, Alev; Mert Eren, Meltem; Ozan, Günce; Yıldız, EsraBulk-fill composites show structural differences compared to those of conventional resin composites. Their more reactive photoinitiators, monomer compositions, and increased filler content may result in higher color stability than for conventional ones. Therefore, this study aimed to assess the color stability of three different bulk-fill composites and one conventional resin composite with a higher filler load after 1week and 1month of immersion in different drinks. The resin composite materials that were tested demonstrated significantly different color changes after immersion in the four solutions during both evaluation periods. Immersion in coffee and red wine showed noticeable staining of all the materials. The discoloration effect of staining solutions on the resin composites depends both on the material composition and on the pigment types found in the solutions.Öğe Comparative evaluation of resin infiltration and remineralisation of noncavitated smooth surface caries lesions: 6-month results(Quintessence Publishing Co Inc, 2019) Gözetici, Burcu; Öztürk Bozkurt, Funda; Toz Akalın, TuğbaPurpose: To compare the therapeutic effects of the resin infiltration technique, self-assembling peptide (P11-4), and fluoride varnish application on white spot lesions (WSLs) on buccal surfaces based on LF pen measurements and LAA-ICDAS scores. Materials and Methods: The lesions of 113 patients from a total of 319 patients with at least four visible WSL on buccal surfaces were assessed by LAA-ICDAS and laser fluoresence (LF pen). To be included in the study, participants were required to have at least 4 buccal WLSs, each in different quadrants, with an LF pen score >= 8. Twenty-one patients were included in the study based on the laser fluoresence values. The lesions were randomly assigned into 4 groups (n = 21): IG (Icon), CRG (Curodont Repair), DG (Duraphat), and CG (control) groups. The treatment protocols were applied, but the control group received no treatment except regular brushing. Lesions were scored by LAA-ICDAS after 3 and 6 months and LF pen after 1 week, 3 and 6 months. Results: There was a statistically significant decrease in LF pen measurements of the control and the intervention groups after 6 months when compared to baseline. The greatest lesion regression was observed with IG (-23.25 +/- 18.21), which differed statistically significantly from CRG (-8.15 +/- 13.89), DG (-10.1 +/- 10.31) and CG (-4.15 +/- 9.72), followed by DG which differed statistically significantly from CG. Statistically significant differences were observed in the activity status of the lesions between baseline and 6 months, except for the control group. Conclusion: In this study, the lesion regression rates shown by mean LF pen values in all groups after six months encourages the management of non-cavitated smooth surface caries lesions with non-operative treatment approaches. Regular brushing and professional tooth cleaning seem to be effective for the management of WSLs on buccal surfaces, and resin infiltration or fluoride varnish might enhance the improvement of these lesions in moderate-to high-caries-risk individuals.
