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A novel deep learning-based perspective for tooth numbering and caries detection
(Springer Heidelberg, 2024) Ayhan, Baturalp; Ayan, Enes; Bayraktar, Yusuf
ObjectivesThe aim of this study was automatically detecting and numbering teeth in digital bitewing radiographs obtained from patients, and evaluating the diagnostic efficiency of decayed teeth in real time, using deep learning algorithms.MethodsThe dataset consisted of 1170 anonymized digital bitewing radiographs randomly obtained from faculty archives. After image evaluation and labeling process, the dataset was split into training and test datasets. This study proposed an end-to-end pipeline architecture consisting of three stages for matching tooth numbers and caries lesions to enhance treatment outcomes and prevent potential issues. Initially, a pre-trained convolutional neural network (CNN) utilized to determine the side of the bitewing images. Then, an improved CNN model YOLOv7 was proposed for tooth numbering and caries detection. In the final stage, our developed algorithm assessed which teeth have caries by comparing the numbered teeth with the detected caries, using the intersection over union value for the matching process.ResultsAccording to test results, the recall, precision, and F1-score values were 0.994, 0.987 and 0.99 for teeth detection, 0.974, 0.985 and 0.979 for teeth numbering, and 0.833, 0.866 and 0.822 for caries detection, respectively. For teeth numbering and caries detection matching performance; the accuracy, recall, specificity, precision and F1-Score values were 0.934, 0.834, 0.961, 0.851 and 0.842, respectively.ConclusionsThe proposed model exhibited good achievement, highlighting the potential use of CNNs for tooth detection, numbering, and caries detection, concurrently.Clinical significanceCNNs can provide valuable support to clinicians by automating the detection and numbering of teeth, as well as the detection of caries on bitewing radiographs. By enhancing overall performance, these algorithms have the capacity to efficiently save time and play a significant role in the assessment process.
ASSESSING THE ORAL HEALTH LITERACY, ORAL HEALTH RELATED QUALITY OF LIFE AND ORAL HEALTH STATUS IN ADULT PATIENTS
(2021) Bayraktar, Yusuf; Bahadır, H. Sevilay
Aim: Oral health literacy (OHL) is an important term that used to determine the individuals skills to make appropriate oralhealth decisions, to process and understand basic oral health information. OHL is considered as a part of oral health. This studyaimed to evaluate the association between OHL, Oral Health Related Quality of Life (OHRQoL) and decayed (D), missing (M)and filled (F) teeth scores (DMFT).Materials and Methods: This study was conducted on Turkish speaking, 300 voluntary individuals between the ages 18-30that were applied to Kırıkkale University Faculty of Dentistry without any cognitive impairment, visual and hearing problem.Patients’ socio-demographic information and DMFT scores were recorded. Then OHL level was detected using a wordrecognition test. After that OHRQoL score was determined using a special survey. Data were analyzed SPSS 16.0 programmewith using Pearson correlation analysis, one-way ANOVA and Scheffe tests.Results: Male individuals had more missing teeth than female individuals (p=0.041). OHL was significantly high at highereducational level individuals (p<0.001). In terms of OHL levels, DT, MT, FT, DMFT and OHRQoL scores did not show significantdifferences (p>0.05). OHL level of the individuals’ did not associated with DT, MT, FT, DMFT and OHRQoL scores (p>0.05).Besides these findings, there is no association was found between DMFT and OHRQoL scores (p>0.05). Age factor showed apositive correlation between MT (p=0.001, r=0.197).Conclusion: The education level of the individuals has an impact on OHL levels. The association between OHL, DMFT andOHRQoL scores did not confirmed clearly.
Assessment of the Prevalence of Pulp Stones in a Sample of Turkish Central Anatolian Population
(Hindawi Publishing Corporation, 2012) Colak, Hakan; Celebi, Ahmet Arif; Hamidi, M. Mustafa; Bayraktar, Yusuf; Colak, Tugba; Uzgur, Recep
Objective. The aim of this study was to determine the prevalence of pulp stones (PS) in a Turkish dental patient population with respect to sexes and dental localization in relation between sex and this anomaly. Materials Methods. A retrospective study was performed using bitewing radiographs of 814 patients ranging in age from 15 to 65. All data (age, sex, and location) was obtained from the files. These patients were analyzed for pulp stones. Descriptive characteristics of sexes, jaws, and dental localization were recorded. The Pearson chi-squared test was used. Results. Of the patients, 462 (56.8%) were female and 352 (43.2%) were male. Sixty (12%) had one or more teeth that contained pulp stones. Pulp stones were identified in 518 (63.6%) of the subjects and in 2391 (27.8%) of the teeth examined. Pulp stone occurrence was significantly more common in the females than in males. With the increasing of age, the prevalence of pulp stones increased. Molars had statistically more pulp stones than premolars. Pulp stones were significantly more common in the maxilla compared with mandible. Conclusion. Prevalence of pulp stones in Turkish population was 27.8% but further larger-scale studies are required to assess its prevalence in the general population to compare it with other ethnic groups.
Bulk-fill kompozitlerin klinik olarak değerlendirilmesi
(Kırıkkale Üniversitesi, 2015) Bayraktar, Yusuf; Ercan, Ertuğrul
Amaç: Bu çalışmanın amacı, hibrit bir posterior kompozit rezin ve üç farklı bulk-fill kompozit rezinin bir yıllık klinik performanslarını değerlendirmekti. Bireyler ve Metot: Bu çalışma okluzyona dâhil olan daimi dişlerinde en az dört adet Sınıf II çürük lezyonu bulunan toplam 50 hastada (22 erkek, 28 bayan) gerçekleştirildi. Her hastada dört farklı kompozit rezin kullanılarak toplamda 200 restorasyon yerleştirildi. Dört farklı grup sırasıyla 1) Clearfil Photo Posterior, 2) Filtek Bulk-Fill Flowable ve Filtek P60, 3) Tetric EvoCeram Bulk-Fill ve 4) SonicFill kompozit materyallerinden oluştu. Restorasyonlar aynı klinisyen tarafından uygulandı ve restorasyonların uygulanmasını takiben bir hafta sonra başlangıç skorlamaları gerçekleştirildi. Hastalar 12 ay boyunca üçer ay arayla kontrol edildi. Kontroller birbirleriyle kalibre edilmiş (Cohen Kappa indeksi = 0,82) deneyimli iki klinisyen tarafından yapıldı. Kontroller esnasında modifiye USPHS kriterlerinden yararlanıldı. Grup içi ve gruplar arası farklar SPSS 20.0 bilgisayar programında Kruskal Wallis ve Friedman testleri kullanılarak %95 güven aralığında analiz edildi. Bulgular: Hastaların bir yıl sonraki takip edilme oranı %86 olarak bulundu. Bir yıl sonunda bütün restorasyonlarda küçük değişiklikler saptandı. 12 ayın sonunda ikinci grup restorasyonların (Filtek Bulk-Fill Flow. ve Filtek P60) bazısında gözlenen bazı değişiklikler başlangıç skorlarıyla karşılaştırıldığında istatistiksel olarak anlamlı bulundu (p<0,05). Diğer grupların 12 ay sonundaki skorları başlangıç skorlarıyla karşılaştırıldığında istatistiksel olarak anlamlı bir farklılık saptanmadı (p>0,05). Bir yıl sonunda gruplar birbirleriyle karşılaştırıldıklarında materyaller arasında istatistiksel olarak anlamlı bir farklılığın olmadığı bulundu (p>0,05). Sonuç: 12 aylık bu klinik çalışmanın sınırlılığında 3 farklı bulk-fill kompozit ve posterior bölgede kullanılan hibrit bir kompozit rezinin klinik performansları arasında istatistiksel olarak anlamlı bir farklılık bulunmamıştır. Bununla beraber daha uzun süreli çalışmalara ihtiyaç vardır.
The challenge of MDP monomer containing adhesive systems: Comparison of shear bond strengths
(2015) Bağlar, Serdar; Bayraktar, Yusuf; Ercan, Ertuğrul; Mutluay, Abidin Talha; Şengün, Abdulkadir
Amaç: Bu in - vitro çalışmanın amacı MDP monomeri içeren üç farklı self- etch adeziv sistemin makaslam a bağ dayanımınlarını değerlendirmektir. Materyal ve Metod: Bu çalışma için atmış adet çekilmiş insan üçüncü molar dişl eri kullanlmıştır. Dişler bir elmas kesme diski yardımıyla ve su soğutması altında kron boylarının orta üçlülerine kadar kesilmiştir. Kesilen dişler rastgele üç gruba ayrılmıştır (n20). Ultradent Bonding Jig yardımıyla ve üç farklı MDP içeren self-etch ad eziv sis tem kullanılarak restorasyonlar yapılmıştır (2,30 mm çap ve 3mm yükseklik). Sonrasında örnekler test cihazına alınmış ve makaslama bağlanma değerleri ölçülmüştür. Bulgu lar: 1. Ve 2. Grup restorasyonlar, 3. Gruba göre anlamlı derecede daha yüksek ma kaslama bağ değeri gösterdi. (p0.05). Bunun yanında 1. Grubun 2. Gruba göre nispeten daha yüksek bağ değeri gösterdiği saptandı. Sonuç: Bu in -vitro çalışmanın sonuçlarına göre, bütün grupların optimal bağ değerlerigösterdiği saptandı. Ancak 1 . ve 2. Gruplar 3. Gruba oranla anlamlı derecede daha iyi bağlanma değerleri gösterdi.
Color Adjustment Potential of Two Single Shade Resin-Based Composites Before and After Staining
(Cumhuriyet University Faculty of Dentistry, 2024) Karadağ, Gökhan; Haberal, Merve; İren, Ahmet Y.; Bayraktar, Yusuf
Objective: This in vitro study aims to evaluate the visual color adjustment potential (CAP-V) of two single shade resin-based composite before and after coffee staining. Materials and Methods: Class 3 cavities were prepared on the mesiobuccal surfaces of a total of 60 acrylic maxillary central denture, 30 in A2 shade and 30 in B1 shade. For the restoration of cavities, two different single-shade resin based composites (Omnichroma and Charisma Diamond One) and a nanohybrid composite (Filtek Ultimate, A2 and B1 Body shades) were used. After the restoration process, the samples were polished. The visual color adjustment potential (CAP-V) of all samples was evaluated 3 times respectively: before the staining process, after the staining process and after the re-polishing process. Data were analyzed with One-way analysis of variance (ANOVA) and Tukey tests (p=0.05). Results: The Omnichroma B1 groups showed better CAP-V values for initial and re-polished groups. In the groups after staining, the best CAP-V values were in the Charisma Diamond One A2 group and the worst values were in the Filtek B1 group (p<0.001). Additionally, no statistically significant difference was found between Omnichroma and Charisma Diamond One in any group except the re-polished B1 group. Conclusions: Within the limitation of this study, we can conclude that B1 shade dentures restored with single-color resin composites are more likely to lose visual harmony due to discoloration over time, compared to A2 shade dentures. However, it was seen that the visual harmony problem caused by staining could be reduced by re-polishing. The single-shade resin composites used in this study generally have similar CAP-V values. © (2024), (Cumhuriyet University Faculty of Dentistry). All rights reserved.
Dental student application of artificial intelligence technology in detecting proximal caries lesions
(Wiley, 2024) Ayan, Enes; Bayraktar, Yusuf; Celik, Cigdem; Ayhan, Baturalp
Objectives: This study aimed to investigate the caries diagnosis performances of dental students after training with an artificial intelligence (AI) application utilizing deep learning techniques, a type of artificial neural network.Methods: A total of 1200 bitewing radiographs were obtained from the institution's database and two specialist dentists labeled the caries lesions in the images. Randomly selected 1000 images were used for training purposes and the remaining 200 radiographs were used to evaluate the caries diagnostic performance of the AI. Then, a convolutional neural network, a deep learning algorithm commonly employed to analyze visual imagery problems, called You Only Look Once, was modified and trained to detect enamel and dentin caries lesions in the radiographs. Forty dental students were selected voluntarily and randomly divided into two groups. The pre-test results of dental caries diagnosis performances of both groups were recorded. After 1 week, group 2 students were trained using an AI application. Then, the post-test results of both groups were recorded. The labeling duration of the students was also measured and analyzed.Results: When both groups' pre-test and post-test results were evaluated, a statistically significant improvement was found for all parameters examined except precision score (p < 0.05). However, the trained group's accuracy, sensitivity, specificity, and F1 scores were significantly higher than the non-trained group in terms of post-test scores (p < 0.05). In group 2 (trained group), the post-test labeling time was considerably increased (p < 0.05).Conclusions: The students trained by AI showed promising results in detecting caries lesions. The use of AI can also contribute to the clinical education of dental students.
Diagnosis of interproximal caries lesions with deep convolutional neural network in digital bitewing radiographs
(Springer Heidelberg, 2022) Bayraktar, Yusuf; Ayan, Enes
Objectives This study aimed to investigate the effectiveness of deep convolutional neural network (CNN) in the diagnosis of interproximal caries lesions in digital bitewing radiographs. Methods and materials A total of 1,000 digital bitewing radiographs were randomly selected from the database. Of these, 800 were augmented and annotated as decay by two experienced dentists using a labeling tool developed in Python programming language. The 800 radiographs were consisted of 11,521 approximal surfaces of which 1,847 were decayed (lesion prevalence for train data was 16.03%). A CNN model known as you only look once (YOLO) was modified and trained to detect caries lesions in bitewing radiographs. After using the other 200 radiographs to test the effectiveness of the proposed CNN model, the accuracy, sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under the receiver operating characteristic curve (AUC) were calculated. Results The lesion prevalence for test data was 13.89%. The overall accuracy of the CNN model was 94.59% (94.19% for premolars, 94.97% for molars), sensitivity was 72.26% (75.51% for premolars, 68.71% for molars), specificity was 98.19% (97.43% for premolars, 98.91% for molars), PPV was 86.58% (83.61% for premolars, 90.44% for molars), and NPV was 95.64% (95.82% for premolars, 95.47% for molars). The overall AUC was measured as 87.19%. Conclusions The proposed CNN model showed good performance with high accuracy scores demonstrating that it could be used in the diagnosis of caries lesions in bitewing radiographs. Clinical significance Correct diagnosis of dental caries is essential for a correct treatment procedure. CNNs can assist dentists in diagnosing approximal caries lesions in bitewing radiographs.
Effect of Er:YAG laser pulse duration on repair bond strength of resin-based and hybrid CAD/CAM restorative materials
(Taylor & Francis Ltd, 2022) Bayraktar, Yusuf; Demirtag, Zulfikar; Celik, Cigdem
Besides the output power and pulse frequency, the pulse duration of Er:YAG laser is an important parameter for conditioning the restorative material surface. This study aimed to investigate the effect of six different pulse modes of Er:YAG laser on the repair bond strength of a hybrid ceramic and two resin-based CAD/CAM restorative materials. Twenty-eight specimens (5 x 5 x 4 mm) were prepared for each CAD/CAM block (Lava Ultimate-(LU), Vita Enamic-(VE), and GC Cerasmart-(GCC)) and randomly divided into seven groups. The specimens except the control group were irradiated using Er:YAG laser at 3 W and 20 Hz using quantum square pulse (QSP), super short pulse (SSP), short pulse (SP), medium short pulse (MSP), long pulse (LP), and a very long pulse (VLP). A micro-hybrid resin composite (Filtek Z250, 3 M ESPE, USA) was placed up to 4 mm on each CAD/CAM specimen in two increments. Bar specimens (1 x 1 x 8 mm) were obtained using a cutting device and thermocycled 10,000 times at 5-55 degrees C. Microtensile bond strength (mu TBS) test was performed at a 1 mm/min crosshead speed. Data were statistically analyzed using two-way ANOVA and Tukey's HSD tests (p < 0.05). mu TBS was significantly affected by both pulse duration and material type (p < 0.001). Pulse duration and material type showed a statistically significant interaction (p < 0.001). Except for QSP, shorter pulse modes resulted in a higher repair bond strength. VLP mode is not recommended to be used in repair procedures with the materials tested.
Effect of laser-assisted retrograde cavity preparation on push-out-bond-strength of mineral trioxide aggregate and calcium-enriched-mixture-cement
(Universidade Estadual Paulista, Institute of Science and Technology of Sao Jose dos Campos, 2022) Bahadir, Hasibe Sevilay; Türkyilmaz, Ali; Bayraktar, Yusuf; Çelik, Çiğdem
Objective: This study aimed to determine the push-out-bond-strength(PBS) of mineral trioxide aggregate (BIOMTA+) and calcium-enriched-mixture-cement (CEM) in retrograde cavities prepared using Er: YAG laser and stainless-steel bur. Material and Methods: The root canals of 60 extracted single-rooted human teeth were prepared, filled and their apical portion of 3-mm were resected using a diamond bur and randomly divided into four groups according to technique of retrograde preparation and filling material as follows(n=15): Group1: bur/ BIOMTA+,Group2: bur/ CEM, Group3: Er:YAG laser/ BIOMTA+, Group4: Er:YAG laser/ CEM. PBS test were performed to specimens and failure modes were evaluated. The data were statistically analyzed with ANOVA, Post-Hoc Tukey and t tests (p< 0.05). Results: CEM was exhibited higher than bond strength compared to BIOMTA+ in retrograde cavity prepared using laser (p= 0.021) and BIOMTA+ in retrograde cavity prepared using bur was exhibited higher than bond strength compared to in retrograde cavities prepared using laser (p= 0.024). Failure modes were dominantly cohesive in all groups tested and one representative specimen each failure mode was examined in SEM and the general characteristics of the failure modes were confirmed. Conclusion: With in the limitations of the present study, when used CEM, Er: YAG laser-assisted retrograde cavity preparation positively affected the bond strength values compared to BIO MTA+. Considering its optimal adhesion, the calcium-enriched-mixture-cement (CEM) might be a good option as a filling material in retrograde cavities in clinical use. © 2022, Universidade Estadual Paulista, Institute of Science and Technology of Sao Jose dos Campos. All rights reserved.
Effect of Saliva Contamination on Microleakage of Open Sandwich Restorations
(UNIV ZAGREB, SCH DENTAL MEDICINE, 2020) Celik, Cigdem; Bayraktar, Yusuf; Ozdemir, Behiye Esra
Objectives: The purpose of the present study was to evaluate the microleakage of conventional glass-ionomer, resin modified glass-ionomer and glass hybrid ionomer Class II open sandwich restorations with or without saliva contamination. Material and methods: Sixty extracted sound human molar teeth were used and 120 class II slot cavities were prepared in mesial and distal surfaces. The gingival margins were located 1 mm below the cementoenamel junction. All specimens were randomly divided in 4 groups (n=15): Group I: High-Viscous Glass Ionomer (Fuji IX GP) Group II: Resin Modified Glass Ionomer (Fuji II LC) Group III: Glass Hybrid Ionomer (Equia-fil Forte), Group IV: Composite Resin (G'aenial Posterior). In open sandwich restoration groups, glass ionomer materials were placed to gingival floor in 1 mm thickness and rest of the cavity was filled with resin composite. After the restorations in mesial surfaces had been performed, distal cavities were restored with the same protocol after saliva contamination. The specimens were thermo-cycled for 10000 cycles at 5 degrees C to 55 degrees C and immersed in methylene blue dye solution (% 0,5) for 24 hours. Then, they were sectioned vertically through the center of the restorations from mesial to distal surface with a water-cooled diamond saw with 1mm thickness. Subsequently, the dye penetration was evaluated with image analysis software. Data were statistically analyzed (p<0.05). Results: There was a statistically significant difference between gingival microleakage scores in no contamination groups, between high-viscous glass ionomer, Fuji IX GP and other materials tested (p<0.05). In saliva contaminated groups, there was no statistically significant difference between gingival microleakage scores (p>0.05). Additionally, there was not a statistically significant difference between the no contamination and saliva contaminated groups regardless of dental materials tested (p>0.05). Conclusion: Within the limitations of this study, in open sandwich restorations, saliva contamination did not show an adverse effect on microleakage irrespective of dental materials tested. Glass hybrid ionomers and resin modified glass ionomers showed lower microleakage scores in gingival margins compared to high-viscous glass ionomer material in no contamination groups.
Evaluation of the repair capacities and color stabilities of a resin nanoceramic and hybrid CAD/CAM blocks
(KOREAN ACAD PROSTHODONTICS, 2020) Bahadir, Hasibe Sevilay; Bayraktar, Yusuf
PURPOSE. This study evaluated the color stabilities of two computer-aided design and computer-aided manufacturing (CAD/CAM) blocks and a nanofill composite resin and the microtensile bond strength (mu TBS) between the materials. MATERIALS AND METHODS. Twelve specimens of 4 mm height were prepared for both Lava Ultimate (L) and Vita Enamic (E) CAD/CAM blocks. Half of the specimens were thermocycled (10,000 cycle, 5 degrees to 55 degrees C) for each material. Both thermocycled and non-thermocycled specimens were surface treated with one of the three different methods (Er,Cr:YSGG laser, bur, or control). For each surface treatment group, one of the thermocycled and one of non-thermocycled specimens were restored using silane (Ceramic Primer II), universal adhesive (Single Bond Universal), and nanofill composite resin of 4 mm height (Filtek Ultimate). The other specimens were restored with the same procedure without using silane. For each group, 1 x 1 x 8 mm bar specimens were prepared using a microcutting device. Bar specimens were thermocycled (10,000cycle, 5 degrees to 55 degrees C) and microtensile tests were performed. Staining of the materials in coffee solution was also compared using a spectrophotometer. Data were analyzed using one-way ANOVA, t-test and post-hoc Scheffe tests. RESULTS. mu TBS were found similar between the thermocycled and non-thermocycled groups (P>.05). The highest mu TBS (20.818 MPa) was found in the non-thermocycled, bur-ground, silane-applied E group. Silane increased mu TBS at some E groups (P<.05). Composite resin specimens showed more staining than CAD/CAM blocks (P<.05). CONCLUSION. CAD/CAM blocks can be repaired with composite resins after proper surface treattilents. Using silane is recommended in repair process. Color differences may be shown between CAD/CAM blocks and the nanofill composite after a certain time period.
Farklı Polisaj Sistem Ve Tekniklerinin Üç Farklı Kompozit Rezinin Yüzey Pürüzlülüğüne Etkisi
(2013) Bayraktar, Yusuf; Doğan, Damla; Ercan, Ertuğrul
Amaç: Bu in-vitro çalışmanın amacı üç farklı polisaj sisteminin yine üç farklı kompozit rezinin yüzey pürüzlülüğüne etkisini araştırmaktır. Ayrıca çalışmada polisaj sistemleri hem ıslak hem de kuru olarak kullanılmış ve polisaj sistemlerinin ıslak ve kuru olarak uygulanmasının yüzey pürüzlülüğüne etkisi araştırılmıştır. Gereç ve Yöntem: Çalışmada kullanılan üç farklı kompozit rezin grubunun (Photo Posterior, KURARAY, JAPONYA, Filtek Ultimate,3M ESPE, ALMANYA, Aelite LS Posterior, BISCO, ABD) her birisi için 10 mm çapında ve 2 mm yüksekliğinde teflon kalıplar kullanılarak otuzar adet örnek hazırlandı. Hazırlanan örnekler rastgele 6 alt gruba ayrıldı. (n5). Alt gruptaki örneklerden ilk üç grup kuru olarak farklı polisaj sistemleri ile polisajlandı. (Optidisk, KERR, İSVİÇRE, Optishine, KERR, İSVİÇRE, Sof-Lex,3M ESPE, ABD) Geriye kalan diğer üç gruptaki örnekler ise yine üç farklı polisaj sistemi (Optidisk, KERR, İSVİÇRE, Optishine, KERR, İSVİÇRE, Sof-Lex,3M ESPE, ABD) ile ıslak olarak polisajlandı. Polisaj sonrası ortalama yüzey pürüzlülükleri (Ra) yüzey pürüzlülük ölçüm cihazıyla ölçüldü. Elde edilen sonuçlar SPSS 16.00 paket programı ve çok faktörlü varyans analizi (ANOVA) ile analiz edildi. Bulgular: Polisaj sonrasındaki ortalama pürüzlülük değerlerine bakıldığında kompozit rezinler arasında en fazla pürüzlülük gösteren kompozit Aelite LS Posterior olurken en az pürüzlülük gösteren materyalin Filtek Ultimate olduğu bulundu. Polisaj sistemleri karşılaştırıldığında Sof-lex ile polisaj yapılan örnekler en düşük pürüzlülük değerini gösterirken, Optishine ile polisajlanan örnekler en yüksek ortalama pürüzlülük değerini gösterdi ve bu sonuçlar ANOVA testi sonuçlarına göre anlamlı bulundu. (p0,05). Islak polisaj yapılan örneklerin ortalama pürüzlülük değerleri, kuru olarak polisajlanan örneklerin ortalama pürüzlülük değerlerinden daha fazla bulundu. Fakat ANOVA test sonuçlarına göre bu durum istatistiksel olarak anlamlı bulunmadı. (p0.05). Sonuç: İnorganik doldurucuları nano boyutta olan kompozit materyallerin daha iyi polisajlandığı ve aliminyum oksit kaplı çok basamaklı polisaj sistemleriyle silikon karpit kaplı tek aşamalı polisaj sistemlerine göre daha pürüzsüz yüzeyler elde edildiği görülmüştür. Ayrıca polisaj işleminin ıslak ya da kuru olarak uygulanmasının çalışmada kullanılan kompozit rezinlerin polisaj sonrası yüzey pürüzlülüklerine etkisinin olmadığı sonucuna varılmıştır.
Kalsiyumdan Zenginleştirilmiş Karışım
(2019) Bahadır, H. Sevilay; Bayraktar, Yusuf
Biyoseramik teknolojisindeki gelişmeler, hastalara yapılan tedavilerin başarısını artırarakendodontik materyal bilimi üzerinde yeni sayfalar açmıştır. Bu materyaller; yüksek osteokondüktif özellikleri ile mükemmel bir biyouyumluluk sağlar ve bu da onları farklı tedaviler için ideal hâlegetirir. Kalsiyumdan zenginleştirilmiş karışım da (CEM) bu materyallerden biridir. Kalsiyumdanzenginleştirilmiş karışım (CEM) olarak adlandırılan ve farklı kalsiyum bileşiklerinden oluşan buyeni siman 2006 yılında diş hekimliğine bir endodontik dolgu malzemesi olarak tanıtıldı. Tozunana bileşenleri ağırlıkça %51,75 CaO, %9,53 SO3, %8,49 P2O5, %6,32 SiO2 bileşikleri iken minör bileşenler Al2O3, Na2O, MgO ve Cl'dir. Materyal ISO 6876:2001 standardına uygun biyolojik özellikleri ile diş hekimliği uygulamalarında kullanılmaktadır. Ayrıca; film kalınlığı, sertleşme süresi,akışkanlık gibi fiziksel özellikleri açısından da diş hekimliği uygulamalarında kullanılmaya uygundur. CEM simanı; kalsiyum ve fosfat iyonları salınan kendine özgü kaynakları bulunan ve bu kaynakları kullanarak hidroksiapatit (HA) oluşturabilen yapıdadır. Üretilen hidroksiapatit (HA) dahasonra dentin köprüsü oluşumunu indüklemektedir. CEM simanı antibakteriyel özellik göstermektedir ve sitolojik ve genotoksisite bakımından da biyolojik olarak uyumlu bulunmuştur. MTA’danfarklı kompozisyona sahip olmasına rağmen benzer klinik uygulama alanları mevcuttur. Vital pulpatedavilerinde, kök rezorpsiyonu tedavilerinde, apeksogenezis ve apeksifikasyon tedavilerinde kullanılan simanın klinik olarak başarılı bulunduğunu gösteren birçok çalışma mevcuttur. Bu çalışmada, CEM simanının özellikleri ve klinik uygulamalarının sonuçlarıyla ilgili güncel literatüraraştırması yapılması ve bilgi verilmesi amaçlanmıştır.
Minimally Invasive Approach for Improving Anterior Dental Aesthetics: Case Report with 1-Year Follow-Up
(Hindawi Ltd, 2018) Bahadir, H. Sevilay; Karadag, Gokhan; Bayraktar, Yusuf
Dental aesthetics have become highly important in recent years. Treating aesthetic demands with noninvasive or minimally invasive techniques can preserve the natural tissues. A 20-year-old female patient presented to the clinic with aesthetic concerns. After the clinical and radiographic examinations, hypomineralization was identified in the maxillary anterior teeth except the maxillary right canine. An external discoloration was also identified in the maxillary left canine tooth. Moreover, the right canine tooth was identified as a Turner's tooth according to the patient's anamnesis. The resin infiltration technique was applied to the maxillary anterior teeth except the maxillary right canine. The bleaching treatment was applied to the maxillary left canine tooth. Then, a laminate veneer restoration was applied to the upper right canine tooth with Turner's hypoplasia. Following the treatment, a satisfactory aesthetic restoration was achieved. After 1-year examination, no clinical failures were observed.
One-year clinical evaluation of different types of bulk-fill composites
(Wiley, 2017) Bayraktar, Yusuf; Ercan, Ertugrul; Hamidi, Mehmet Mustafa; Colak, Hakan
Aim: In the present study, we evaluated the 1-year clinical performance of a conventional posterior composite resin and three bulk-fill composite resins. Methods: Fifty patients with four class II restorations under occlusion were enrolled in the present study. A total of 200 restorations were placed in the cavity, 50 for each material (Clearfil Photo Posterior, Filtek Bulk-Fill Flowable and Filtek P60, Tetric EvoCeram Bulk-Fill, and SonicFill). One operator placed the restorations in the cavity, and 1 week later the patients were called for baseline examination. Two calibrated examiners evaluated the restorations once every 3 months for 1 year, according to United States Public Health Service criteria. The data were analyzed using SPSS. Non-parametric tests (Kruskal-Wallis, Mann-Whitney U-test, and Friedman) were used for the analysis at a confidence level of 95%. Results: The 1-year recall rate was 86%. All restorations showed minor modifications after 1 year. However, no statistically-significant differences were detected between the materials' performance at baseline and after 1 year for all criteria (P > 0.05). Conclusions: The bulk-fill composite resin materials showed similar clinical performance when compared with a conventional posterior composite resin. Further evaluations are necessary for the long-term clinical performance of these materials.
Prevalence of burning mouth syndrome in adult Turkish population
(2011) Çolak, Hakan; Bayraktar, Yusuf; Hamidi, Mehmet Mustafa; Uzgur, Recep; Toptancı, İsmet Rezani; Dallı, Mehmet
Ağız yanması sendromu (AYS) kronik bir orofasiyal ağrı olarak tanımlanır ve semptomatik olarak dilde ve dudakta veya bütün ağız boşluğu içinde yangı tarzında bir ağrıyla karakterizedir. Uluslararası çalışmalarda Ağız yanması sendromunun prevalansının %0,6 ile %15 arasında değiştiği rapor edilmektedir. Bu çalışmada Türk toplumunda AYS prevalansının belirlenmesi amaçlanmıştır. Gereç ve yöntem: Demografik özellikler, tıbbi öykü ve hastalar tarafından alınan ilaçlar ile birlikte klinik verileri de içeren bir anket formu oluşturuldu. Bu kesitsel çalışma Kırıkkale Üniversitesi Diş Hekimliği Fakültesi Restoratif Diş Hekimliği bölümüne başvuran katılımcılar arasından rastgele seçilen 1000 hasta (500 kadın ve 500 erkek) üzerinde gerçekleştirilmiştir. Sonuçlar: 12 hastada ağız yanması sendromu tespit edilmiştir prevelansı %0,12 olarak bulunmuştur. Bu hastaların 2’ si erkek ve 10’u kadındır. Erkek kadın oranı 1:5 olarak bulunmuştur. Ağız yanması sendromu en çok dilde görülmüştür. Parafonksyonel alışkanlıklar en yaygın faktor olarak gözlemlenmiştir. Görsel analog skala (VAS) sonuçlarına göre ortalama (SD) yangı şiddeti seviyesi 5,45(1,69) olarak bulunmuştur. Sonuç: Ağız yanması sendromunun Türk toplumunda prevalansı düşük olup kadınlarda daha sık rastlanmaktadır.
Rapid Polymerization And Etching Procedure Effect On Microleakage Of Class V Restorations
(2019) Bayraktar, Yusuf
Background and Aim: This study aimed to investigate theeffect of the rapid polymerization and etching procedure onmicroleakage scores of Class V restorations.Materials and Methods: Class V cavities were uniformlyprepared by one operator in 60 bovine incisors. The specimenswere randomly divided into six groups and restored as follows:Group 1: Selective enamel etching (SEE) sixth-generationadhesive system (AS) composite resin (CR) polymerizedat 3200 mW/cm2 for 6 s. Group 2: SEE sixth-generationAS CR polymerized at 1000 mW/cm2 for 20 s. Group 3: Noetching (NE) sixth-generation AS CR polymerized at 1000mW/cm2 for 20 s. Group 4: NE sixth-generation AS CRpolymerized at 3200 mW/cm2 for 6 s. Group 5: Total etching(TE) fifth-generation AS CR polymerized at 3200 mW/cm2for 6 s. Group 6: TE fifth-generation AS CR polymerized at1000 mW/cm2 for 20 s. After the thermal cycling procedure,all specimens were sectioned and microleakage scores wereevaluated by two operators. The data were analyzed usingKruskal-Wallis and Mann-Whitney U tests (p 0.05).Results: Gingival microleakage scores were found higherthan incisal microleakage scores (p0.05). Results of themicroleakage test revealed that different cavity conditioningmethods, duration and power density of the light polymerizationprocedure significantly affected the microleakage rates at theincisal margins (p0.05).Conclusion: SEE with the sixth-generation AS reducedmicroleakage. Rapid polymerization procedures can beperformed for small Class V cavities using the etch-and-rinsesystem and SEE procedure.
Repair bond strength and surface topography of resin-ceramic and ceramic restorative blocks treated by laser and conventional surface treatments
(WILEY, 2020) Bayraktar, Yusuf; Arslan, Merve; Demirtağ, Zülfikar
This study intended to compare the repair bond strength of computer-aided design/computer-aided manufacturing (CAD/CAM) blocks consisting of resin and feldspathic ceramics following different surface treatments using the microtensile bond strength (mu TBS) test. Ten specimens were prepared with 4 mm height for Vita Enamic (VE), Lava Ultimate (LU), Vita Mark II (VM), and thermocycled (10,000 cycle, 5-55 degrees C). Each material was categorized into one of five subgroups according to following surface treatments: (a) bur grinding (BG), (b) hydrofluoric acid etching (HF), (c) neodymium-doped yttrium aluminum garnet (Nd:YAG or NY), (d) erbium-doped yttrium aluminum garnet (Er:YAG or EY), and (e) erbium, chromium-doped yttrium, scandium, gallium, and garnet (Er,Cr:YSGG or ECY) laser conditioning. After surface treatment procedures, specimens were properly restored to 4 mm high with a micro-hybrid composite resin. Bar specimens (1 x 1 x 8 mm) were obtained using a low-speed cutting machine and then thermocycled (10,000 cycle, 5-55 degrees C). The mu TBS was tested at 1 mm/min crosshead speed, and failure modes were evaluated. Data were analyzed with two-way ANOVA and post hoc Tukey tests. LU-BG showed significantly higher mu TBS (32.94 +/- 5.80 MPa) compared to LU-laser groups (p < .05). VE-BG showed significantly higher mu TBS (22.06 +/- 4.26 MPa) compared to other VE groups (p < .05). Among the laser groups, the NY laser produced the lowest (p < .05) mu TBS for LU (13.42 +/- 3.44 MPa) and VE (2.27 +/- 0.85 MPa), while EY showed the highest (p < .05). Laser-treated VM groups were all prefailured. VM-HF produced a higher mu TBS (18.73 +/- 3.75 MPa) than VM-BG (5.05 +/- 1.76 MPa) (p < .05).
Talon cusps: Two case reports
(2019) Bayraktar, Yusuf; Bahadır, H. Sevilay
The talon is an accessory, irregular cusp on incisors and canines, involving in enamel and dentine with or without pulp tissue.It was also reported in association with syndromes, for example, Mohr Syndrome, Incontinenta pigmentii Achromians, Ellis-van Creveld Syndrome, Struge Weber Syndrome, Rubinstein Taybi Syndrome, and Alagille’s Syndrome. The aim of this paperwas to describe talon tubercules in two cases. In first case the talon cusp is seen on lingual surface of the maxillary left central tooth and there is a specific talon tubercle which extending from the incisal edge to the cervical edge, perpendicular to the mesiodistal surface of the tooth. In second case bilateral talon tubercles were detected extending from the cervical region less than half of the incisal margin on the lingual surface of the maxillary central and lateral teeth. This present two case reports radiograph gives a v-shaped radiopaque image.Talon tubercle is a dental anomaly we rarely encounter. Consequently this anomaly may occur with a systemic syndrome Therefore, clinicians should have adequate knowledge of this anomaly.

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