Assessment of the Prevalence of Pulp Stones in a Sample of Turkish Central Anatolian Population

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

Evaluation of fit and mechanical properties of fixed partial denture frameworks fabricated by different techniques

YÖK Tez ID: 386445Bu çalışmanın amacı; farklı bilgisayar destekli üretim yöntemleri ile elde edilen sabit protezlerin iç ve marjinal uyumlarının; yeni geliştirilen bir sayısal yöntemle tabakalama seramiği uygulaması öncesi ve sonrasında ölçülmesi ve kıyaslanması bunun yanı sıra mekanik özelliklerinin de incelenmesidir. Bu amaçla mandibular sağ 2.premolar ve 2.molar dişi taklit eden 3 boyutlu model çizilmiş ve CADAnamodel dosyası olarak isimlendirilmiştir. Bu model üzerinde bir 3 üyeli sabit bölümlü protez metal alt yapısı tasarlanmış ve bu dosya CADTasarım dosyası olarak isimlendirilmiştir. Bu dosya aracılığı ile freze edilmiş mum alt yapıların dökümü yoluyla üretim yöntemi, seçici lazer sinterleme yöntemi, tam sinterlenmiş bloktan freze yöntemi ve yarı sinterlenmiş bloktan freze yöntemleri kullanılarak toplamda 64 adet sabit protez metal alt yapısı elde edilmiştir. Bu sabit protez metal alt yapıları bir topografik sayısallaştırma cihazı yardımıyla tabakalama seramiği uygulaması öncesi ve sonrasında taranmıştır. Elde edilen dosyalar; CADAnamodel dosyası ile 3 boyutlu olarak çakıştırılarak iç ve marjinal uyum ölçümleri gerçekleştirilmiştir. Elde sabit protezler iki alt gruba ayrılmış; ilk alt gruba herhangi bir işlem uygulanmazken ikinci alt gruba termal siklus ve dinamik yükleme işlemlerini takiben, tüm sabit protezler 3 nokta bükülme testine tabi tutulmuştur. Çalışma sonucunda elde edilen veriler istatistik paket programı yardımıyla Genel Lineer Model tekniği ve DUNCAN post-hoc testi kullanılarak değerlendirilmiştir. (p= 0.05). Elde edilen sonuçlara göre; tam sinterlenmiş bloktan freze yöntemi ile elde edilen sabit protez metal alt yapıları, tabakalama seramiği uygulaması öncesi ve sonrasında en düşük ortalama iç ve marjinal aralık değerlerini göstermiştir. Fırınlama işlemi iç ve marjinal aralık değerlerinde genel olarak artışa sebep olmuştur. En yüksek ortalama mekanik dayanıklılık değerleri; hem termal siklus ve dinamik yükleme işlemi yapılan hem de yapılmayan tam sinterlenmiş bloktan freze yöntemiyle elde edilen sabit protezlerde görülmüştür.The aim of this study is to; (1) evaluate the internal/marginal fit of fixed partial denture frameworks fabricated with different computer aided manufacturing techniques before and after application of layering ceramics by a newly developed digitized method; (2) comparison of mechanical properties of fixed partial dentures fabricated with different computer aided manufacturing techniques. A three dimensional model simulating prepared mandibular right second premolar and second molar teeth was prepared. A three dimensional fixed partial denture framework was designed and the obtained file was referred as CADDesign. A total of 64 three unit fixed partial denture frameworks were fabricated with casting milled wax technique, selective laser sintering technique, dense milling technique and soft milling techniques respectively. The frameworks were scanned utilizing a topographic digitizer before and after the application of layering ceramic. Obtained three dimensional files were coincided with the corresponding CADMasterfile and the internal and marginal fit measurements were performed. Fixed partial dentures were divided into 2 sub-group. While the first sub-group was not subjected to any process, second sub-group were subjected thermo cycling and dynamic loading process respectively. Following these procedures, all fixed partial dentures were taken with three point bending test. The data obtained were evaluated by Generalised Linear Model procedure and the DUNCAN post-hoc test (p= 0.05). According to obtained results; fixed partial dentures fabricated with dense milling technique provided lowest mean internal and marginal gap values before and after layering ceramic application. Porcelain firings has led to an increase of the mean internal and marginal gap values. Fixed partial dentures fabricated with dense milling technique showed the highest mechanical strengths

Farklı yöntemlerle elde edilen sabit protez metal alt yapılarının uyumve mekanik özelliklerinin karşılaştırılması

Tez (Doktora) -- Kırıkkale Üniversitesi100219

Analysis of Endodontic Complications Following Fixed Prosthodontic Rehabilitation

Colak, Hakan/0000-0001-8262-0913WOS: 000388550900005PubMed: 27824975Purpose: The aim of this study was to determine endodontic treatment needs and types of endodontic disease following fixed prosthodontic treatment 24 hours after tooth preparation, 1 week after tooth preparation, 1 month after placement, and 6 months after placement. Materials and Methods: Study groups consisted of patients who attended a university dental hospital department of prosthodontics for fixed prosthodontic treatment from January 2011 to December 2013. All teeth were clinically and radiographically evaluated according to American Association of Endodontists evaluation criteria before preparation. Metal-ceramic fixed partial dentures were placed for all patients. A total of 1,633 abutment teeth were prepared with 1,100 pontics in 524 patients (214 female and 310 male). Participant age, sex, and tooth number were recorded. Endodontic treatment follow-up was scheduled for 24 hours after tooth preparation, 1 week after preparation, 1 month after placement, and 6 months after placement, and all teeth were evaluated after placement of FPDs according to a modified criteria. Results: 2,733 retainers were placed with 624 FPDs. Of the FPDs, 332 (53%) were placed in the posterior and 196 (31.5%) in the anterior region. The remaining 96 FPDs (15.5%) were placed anteroposterior. The abutment/pontic ratio was 1.44:1. The number of retainers per FPD was 4.37. Of 1,633 abutment teeth, 103 were endodontically treated after placement of FPDs. Most observed endodontic disease was symptomatic irreversible pulpitis. There were statistically significant differences in terms of teeth regions (P .05). Conclusion: A total of 2,733 retainers on 624 FPDs were evaluated over 6 months, and the mean endodontic treatment need ratio was 6.3%

A Survey on Prevalence, Causes and Prevention of Post-cementation Hypersensitivity

Colak, Hakan/0000-0001-8262-0913; Ozcan, Mutlu/0000-0002-9623-6098WOS: 000411710300006PubMed: 28509508This study evaluated the prevalence and causes of post-cementation sensitivity and possible prevention measures according to the experience of dentists through an inter-net survey. A questionnaire was prepared with 25 items based on a survey introduced by Rosenstiel and Rashid. An online site was created for the participation to the survey. A total of 322 participants responded the questionnaire. The results of the questionnaire indicated the amount of tooth preparation (42.1%) is the most frequent reason for hypersensitivity followed by water-cooling with pressure (11.2%) and provisionals (10.9%). "Very important" response for tooth reduction, time before cementation, overheating, luting agent, occlusion and provisionals were found to be of statistical significance (p<0.001). Comparing respondents' opinions the incidence of post-cementation sensitivity appears to be underestimated. Tooth reduction, preparation under high volume spray and quality of provisional restorations was considered to have a significant impact on the incidence of post-cementation sensitivity according to the dentists surveyed across Turkey. Respondents to the questionnaire considered the use of antimicrobial, desensitizing, resin bonding, hemostatic agents, varnishes, type of liner material, rotary instruments to be less effective for prevention of post-cementation sensitivity

Cement Thickness of Inlay Restorations Made of Lithium Disilicate, Polymer-Infiltrated Ceramic and Nano-Ceramic CAD/CAM Materials Evaluated Using 3D X-Ray Micro-Computed Tomography

Colak, Hakan/0000-0001-8262-0913; Ozcan, Mutlu/0000-0002-9623-6098WOS: 000435265200010PubMed: 27517616PurposeTo evaluate the marginal and internal cement thicknesses of inlay restorations made of various CAD/CAM materials using 3D X-ray micro-computed tomography (micro-CT) technique. Materials and MethodsCaries-free extracted mandibular molars (N = 30) with similar size were randomly assigned to three groups (N = 10 per group). Mesio-occlusal-distal (MOD) cavities were prepared, and inlay restorations were obtained by milling out CAD/CAM materials namely, (a) IPS: monolithic lithium disilicate (control), (b) VE: polymer-infiltrated ceramic, and (c) CS: nano-ceramic using a CAM unit. Marginal and internal cement thicknesses were measured using 3D micro-CT. Data were analyzed using 1-way ANOVA and Tukey's tests (alpha = 0.05). ResultsThe mean marginal and internal cement thickness were not significant in all inlay materials (p > 0.05). Mean marginal cement thickness (m) was the lowest for the IPS group (67.54 10.16) followed by VE (84.09 3.94) and CS (95.18 +/- 10.58) (p > 0.05). The internal cement thickness (m) was the lowest in the CS group (54.85 +/- 6.94) followed by IPS (60.58 +/- 9.22) and VE (77.53 +/- 12.13) (p > 0.05). ConclusionMarginal and internal cement thicknesses of MOD inlays made of monolithic lithium disilicate, polymer-infiltrated ceramic, and nano-ceramic CAD/CAM materials were similar and all less than 100 m, which could be considered clinically acceptable. Clinical significanceMOD inlays made of different CAD/CAM materials presented similar cement thickness, less than 100 m.Kirikkale University, Research Center, TurkeyThis study was supported by Kirikkale University, Research Center, Turkey

A Cross-Sectional Survey on Reasons for Initial Placement and Replacement of Single Crowns

This cross-sectional survey investigated the reasons for placement and replacement of single crowns, the type of materials selected for initial placement and evaluated their longevity. Information was collected over 19 months period using a questionnaire focusing on the principal reasons for the placement and replacement of crowns, selected material type and the age of the crowns at the time of replacement. A total of 842 single crowns were evaluated in 476 patients. Of the 842 crowns, 472 (56%) were initial placements and 370 (44%) replacements. The main reason for placement of first single crowns was related to endodontic problems (26.5%). Metal-ceramic was indicated significantly more frequent (88.9%; p⟨0.01) than other materials for the placement and replacement of single crowns. The median age of the replaced crowns was 6 years

The effect of different adhesives and setting times on bond strength between Biodentine and composite

Colak, Hakan/0000-0001-8262-0913; Hamidi, Mehmet Mustafa/0000-0003-3461-7925; ERCAN, Ertugrul/0000-0002-4753-6553WOS: 000388385600012PubMed: 27149941Background: The aim of this study was to evaluate the effects of 3 different adhesives with different functional monomers, on the shear bond strength (SBS) of Biodentine (R). Methods: Acrylic blocks (n = 90) were prepared and a 2-mm height x 4-mm diameter hole was opened in each block. Every hole was completely restored with Biodentine (R). Before preparation of composite restorations over the Biodentine (R) (2-mm height x 2-mm diameter), 3 different adhesives (Etch-37 (37%) w/BAC by Bisco & Prime Bond N&T, Clearfil S-3 Bond and Adper Prompt L-Pop) were applied. SBS was evaluated using a universal testing machine, and failure mode for each sample was recorded. The results were statistically analyzed using 2-way ANOVA and post hoc Tukey test. Results: When the megapascal values of all groups were compared, although there was no statistically significant difference in the different setting times (p>0.05), statistically significant differences were observed among all adhesive groups (p<0.05). Moreover, the highest SBS values were observed in the Clearfil S-3 Bond group. Conclusions: Clinical performance of Biodentine (R) may be affected by adhesive procedures and its setting time

Yetişkin Türk toplumunda ağız yanması sendromu prevalansı

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.Burning mouth syndrome (BMS) is defined as a chronic orofacial pain condition, characterized symptomatically by burning pain localized to the tongue and lips or may involve the entire oral cavity. The prevalence of burning mouth symptoms reported from international studies ranges from 0.6% to 15%. The aim of this study was to determine the prevalence of burning mouth syndrome in adult Turkish population. Materials and methods: A questionnaire was designed to collect data on demographic characteristics, medical history and drugs taken by the patients and clinical examination was performed. A cross-sectional study was carried out on 1000 (500 men and 500 women) randomly selected patients who attended attending to Kırıkkale University Dental Faculty Department of Restorative Dentistry. Results: BMS was diagnosed in 12 patients with 0.12% prevalence in 2 man and 10 women, with 1:5 ratio respectively. The most common site for BMS was tongue. Para functional habits were the most common local factor. According to visual analogue scale (VAS) mean (±SD) level of burning intensity was 5.45 (±1.69). Conclusions: Burning Mouth Syndrome in Turkish population has low prevalence and is more frequent in females