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Öğe Apically extruded debris evaluation with the use of ProTaper Ultimate and TruNatomy files systems with and without glider preparation in primary tooth(MRE Press, 2024) Eskibağlar, Büşra Karaağaç; Özata, Merve YeniçeriInformation regarding the influence of resorption and glide paths on debris extrusion in primary teeth is lacking. Therefore, we evaluated debris extrusion with and without resorption and with and without the use of a path file in primary molar teeth prepared with ProTaper Ultimate (PTU) Prime and TruNatomy (TRN) Prime rotary file systems. Forty resorbed and forty non-resorbed primary molar teeth were collected. Both groups were divided into four subgroups (n = 10). The Eppendorf tubes were weighed pre-debris. The distal canals of the teeth were prepared with PTU Prime and TRN Prime file systems, with and without the use of path files. The debris-filled tubes were weighed, and the weight of only the extruded debris was calculated by subtraction. The data were analyzed using a three-way analysis of variance (ANOVA) test. The presence of tooth resorption significantly increased debris extrusion, and the use of a path file significantly decreased debris extrusion (p < 0.001). The binary and ternary interactions of the three evaluated parameters among the groups showed no significant differences in terms of the amount of debris extruded (p > 0.05). While debris extrusion was observed in all groups, the use of a glide path file in primary teeth before the preparation process resulted in less debris extrusion.Öğe Comparison of XP-endo Finisher, self-adjusting file, and Canal Brush systems on the removal of calcium hydroxide paste from root canals(Mashhad University of Medical Sciences, 2023) Özata, Merve Yeniçeri; Kaya, Sadullah; Arıkan, Nihal Firdevs Özfidan; Zengin, Ezgi İlkay; Tartuk, Gizem AkınIntroduction: This study aimed to compare the effectiveness of XP-endo Finisher (XPF), self-adjusting files (SAF), and Canal Brush (CB) systems in removing calcium hydroxide (CH) from an artificial standardized groove (ASG) created in the apical root area. Methods: Fifty-five mandibular premolar teeth were prepared to size Reciproc R40 and were split longitudinally. An ASG was prepared in the apical third of the root and filled with CH. The root halves were reassembled, and the samples were divided into two control groups [positive control and negative control (n=5)] and three experimental groups [XPF, SAF, and CB, (n=15)]. The results were evaluated according to a four-grade scoring system to assess the remained CH in ASGs. The statistical difference between the groups was analyzed using the Kruskal-Wallis test. Results: There was no statistically significant difference between the experimental groups in the ability to remove CH from the apical root thirds (P>0.05). Conclusion: None of the finishing techniques could completely clean CH. The SAF, XPF, and CB systems showed comparable efficacy in removing CH from the roots. © 2023 Mashhad University of Medical Sciences\.Öğe Evaluation of middle mesial canal prevalence and morphology in mandibular molars in a Turkish population by cone beam computed tomography (CBCT)(Mashhad University of Medical Sciences, 2023) Yüzer, Merve Ece; Kaya, SadullahObjective: This study aimed to assess the prevalence and morphology of the middle mesial (MM) canal in the mandibular first, second, and third molars of a Turkish population using cone beam computed tomography (CBCT). Methods: In this retrospective cross-sectional study, CBCT scans of 637 patients were analyzed. Molar teeth with complete root development and without prior root canal treatment were included, counting 2177 mandibular molars. The prevalence of isthmus and MM canal, and the morphology of the MM canals (confluent, independent, or fin-type canals) was determined in different molar groups. Data analysis was performed by the chi-square test, and the intra-observer reliability was assessed using the Kappa coefficient at a significance level of P<0.05. Results: The overall prevalence of the isthmus and MM canal in mandibular molars was 51.36% and 8.36%, respectively. The prevalence of isthmus was greatest in second molars (54.78%) and the prevalence of MM canal was highest in first molars (15.58%). A significant association was found between the prevalence of isthmus and MM canal with the type of molar tooth (p<0.05), but the morphology of the MM canal was not significantly different among the molar groups (P=0.41). There was no significant relationship between the presence of the MM canal and the age and gender of the participants (P>0.05). Conclusions: The MM canal is occasionally observed in mandibular molars, predominantly in the first molars, emphasizing the need for accurate diagnosis to reduce post-operative complications. The majority of identified MM canals were of the confluent type.Öğe Investigation of fracture prevalence of instruments used in root canal treatments at a faculty of dentistry: a prospective study(Korean Acad Conservative Dentistry, 2023) Eskibağlar, Mehmet; Özata, Merve Yeniçeri; Ocak, Mevlüt Sinan; Öztekin, FarukObjectives: The aim of this study was to examine the use of hand or rotary files by pre-graduation (fourth- and fifth-year) and postgraduate students in endodontic treatments and to determine the incidence of file fracture and the management of cases with broken instruments. Materials and Methods: A total of 2,168 teeth undergoing primary endodontic treatment were included in this study. It was determined that 79 of these teeth resulted in broken tools. In the case of broken tools, the education level of the treating clinician, the tooth that was being treated, the canal and fracture level, the curvature of the tooth and the management of the broken instrument were recorded. Periapical radiographs of the patients were used to calculate curvature following the Schneider method. Results: There was no significant difference in the incidence of broken tools according to education level (p > 0.05). The incidence of file fracture in molar teeth (73.4%) was higher than in other teeth (p < 0.05). More files were broken in the mandibular molar MB canal (20.25%) and in the apical third of the canals (72.1%). The risk of instrument fracture was high in teeth with moderate (44.3%) and severe (38%) curvature canals. The management of apically broken (80%) files mostly involved lefting (p < 0.05). Conclusions: There was no statistically significant difference between fourth-year students, fifth-year students and postgraduate students in terms of instrument fracture.Öğe The micro CT evaluation of crown and root pulp volume versus dentin thickness in teeth in postmortem interval (PMI)(Humana Press Inc, 2024) Çetin, Selçuk; Akbulut, Nihat; Orhan, Kaan; Bilecenoğlu, Burak; Ocak, Mert; Bayram, Emre; Altan, AhmetDetermining the postmortem interval (PMI) is one of the main study subjects of forensic sciences. The main purpose of this prospective in vitro study that was the Micro-CT evaluation of teeth crown and root pulp volume versus dentin thickness in terms of PMI determination. The study involved 60 female Wistar rats, with weights ranging from 270 to 320 g. These rats were grouped into six different post-mortem period categories. Following the animals' sacrifice, they were subjected to a natural putrefaction period, with a control group, in the grounds of a sheltered garden. Hemi-mandible samples were then extracted and placed in glass tubes for Micro-CT evaluations, following the progression of putrefaction processes. The pulp volume and dentin thickness were assessed using Micro-CT, and the gathered data underwent statistical analysis. Micro-CT was employed to analyze sixty right mandibular second molar teeth in the hemi-mandible. The crown pulp volume exhibited a reduction in group 6, with a value of 0.239 mm(3) after a three-month period of natural putrefaction (p < 0.001). There is statistically differences among groups in case of pairwise comparison (p < 0.05). However, the root pulp volume and dentin thickness variables did not display any statistically significant changes. Despite certain limitations associated with this study, the Micro-CT findings concerning teeth pulp volume can serve as an objective parameter, especially for late postmortem investigations and the estimation of time of death.Öğe The micro-shear bond strength of new endodontic tricalcium silicate-based putty: An in vitro study(John Wiley and Sons Inc, 2023) Özata, Merve Yeniçeri; Falakaloğlu, Seda; Plotino, Gianluca; Adıgüzel, ÖzkanThis study aimed to compare in vitro micro-shear bond strength (μSBS) of three different endodontic tricalcium silicate-based materials in contact with a bulk-fill resin-based composite. Thirty cylindrical resin blocks with a hole in the centre (2 mm in depth and 4 mm in diameter) were manufactured with a 3D printer and divided into three groups (n = 10), depending on the calcium silicate cement used: light curing TheraCal LC (Bisco, Schaumburg, IL, USA), liquid–powder NeoMTA 2 (NuSmile Avalon Biomed, Bradenton, FL, USA) and putty NeoPutty (NuSmile, Houston, TX, USA). Each sample was stored for 24 h at 37°C and 100% humidity. Then, after adhesive placement, the restorative material Filtek bulk-fill (3 M ESPE, St. Paul, MN, USA) was placed over the capping material using cylindrical plastic capsules (2 mm height and 2 mm) and polymerised for 20 s. Specimens were then tested in a universal testing machine for the compression load resulting in the μSBS. The data were compared with the one-way ANOVA (Welch) and the Tamhane test. The mean value was significantly higher in the TheraCal LC group than in the other two groups (p < 0.05). There was no significant difference between NeoMTA 2 and NeoPutty groups (p > 0.05). The majority of failure modes for all groups were cohesive within biomaterial. Using TheraCal LC in the pulp capping procedure can result in higher bond strength values to the tested bulk-fill resin-based composite than NeoMTA 2 and NeoPutty.Öğe Influence of access cavity design on calcium hydroxide removal using different cleaning protocols: a confocal laser scanning microscopy study(Korean Academy of Conservative Dentistry, 2023) Falakaloğlu, Seda; Özata, Merve Yeniçeri; Güneş, Betül; Silva, Emmanuel João Nogueira Leal; Gündoğar, Mustafa; Topal, Burcu GüçyetmezObjectives: The purpose of this study was to evaluate the influence of endodontic access cavities design on the removal of calcium hydroxide medication of the apical third of mandibular incisor root canal walls and dentinal tubules with different cleaning protocols: EDDY sonic activation, Er,Cr:YSGG laser-activated irrigation, or conventional irrigation with IrriFlex. Materials and Methods: Seventy-eight extracted human mandibular incisors were assigned to 6 experimental groups (n = 13) according to the endodontic access cavity and cleaning protocol for calcium hydroxide removal: traditional access cavity (TradAC)/EDDY; ultraconservative access cavity performed in the incisal edge (UltraAC.Inc)/EDDY; TradAC/Er,Cr:YSGG; UltraAC. Inc/Er,Cr:YSGG; TradAC/IrriFlex; or UltraAC.Inc/IrriFlex. Confocal laser scanning microscopy images were used to measure the non-penetration percentage, maximum residual calcium hydroxide penetration depth, and penetration area at 2 and 4 mm from the apex. Data were statistically analyzed using Shapiro-Wilk and WRS2 package for 2-way comparison of non-normally distributed parameters (depth of penetration, area of penetration, and percentage of non-penetration) according to cavity and cleaning protocol with the significance level set at 5%. Results: The effect of cavity and cleaning protocol interactions on penetration depth, penetration area and non-penetration percentage was not found statistically significant at 2 and 4 mm levels (p > 0.05). Conclusions: The present study demonstrated that TradAC or UltraAC.Inc preparations with different cleaning protocols in extracted mandibular incisors did not influence the remaining calcium hydroxide at 2 and 4 mm from the apex.Öğe Maxillary cortical bone thickness in a south- eastern anatolian population: A cone-beam computed tomography study(International Scientific Information, Inc., 2017) Adıgüzel, Özkan; Belgin, Ceren Aktuna; Falakaloğlu, Seda; Cangül, Suzan; Akkuş, ZekiBackground: The aim of this study was to measure the distance between the maxillary premolar and molar teeth apices to the buccal cortical bone and evaluate differences in gender and age group, using cone beam computed tomography (CBCT). Material/Methods: This retrospective study comprised of 451 premolar and molar teeth of one hundred and thirteen patients who were admitted to Dicle University, Faculty of Dentistry, Department of Dentomaxillofacial Radiology for different reasons. Data were analyzed using Student’s t-tests and Tukey HSD tests. Results: There was significant difference in buccal bone thickness by gender (p<0.05). The thinnest point of the maxillary buccal bone was measured in women as 2.11 mm and in men as 2.02 mm in the first premolar teeth. The thickest point of maxillary buccal bone was measured in women as 9.87 mm and in men 10.71 mm palatinal root of the first molar. A comparison of buccal bone thickness between age showed a statistically significant difference at the distobuccal and palatinal roots of the first molar, at the mesiobuccal root of the second molar (p<0.05). Conclusions: The measurements of maxillar buccal bone thickness using CBCT for various dental procedures especially in endodontic surgery, orthodontic mini implant treatment, dental implant procedures, and healing after tooth extraction that are important knowledge.Öğe Comparison of local and systemic ibuprofen for relief of postoperative pain in symptomatic teeth with apical periodontitis(International Scientific Information, Inc., 2022) Uysal, İbrahim; Eratilla, Veysel; Topbaş, Celalettin; Ergül, İsmail; Çelik, YusufBackground: One of the aims of endodontic treatment is to control preoperative and postoperative pain. The present study evaluated the effects of local and systemic ibuprofen on postoperative pain. It aimed to determine the most effective method for relieving postoperative pain due to chemomechanical preparation. Material/Methods: Ninety patients with symptomatic apical periodontitis were randomly assigned to local ibuprofen, systemic ibuprofen, and control groups (n=30 each). Chemomechanical preparations were performed using a ProTaper Universal Ni-Ti rotary file under 2.5% sodium hypochlorite and 17% ethylenediaminetetraacetic acid irrigation. After the root canals were dried with sterile paper points, while Odontocide paste was applied into the root canals of the patients in the local ibuprofen group, calcium hydroxide paste was applied into the root canals of the patients in the systemic ibuprofen and control groups. Following completion of the endodontic treatment procedure, 200 mg ibuprofen was prescribed to patients in the systemic ibuprofen group. Friedman and Wilcoxon tests were used for statistical analysis. Results: Posttreatment pain scores were recorded at 6, 12, 24, and 48 h using a visual analogue scale. Although there were no significant differences between the local ibuprofen group (Odontocide) and the control group (Ultracal) (P>0.05), pain scores in the systemic group (Ultracal+200 mg ibuprofen) were significantly lower than those in the other 2 groups (P<0.05). Conclusions: These results indicate that systemic administration of ibuprofen is effective for postoperative pain relief.Öğe 1. International Dental Research and Health Sciences Congress abstract book(Dicle Üniversitesi, 2021) Adıgüzel, ÖzkanKonular, endodonti, restoratif ve çocuk diş hekimliği, protez, ortodonti, diş implantları, periodontoloji, oral radyoloji, çene-yüz cerrahisi, lokal anestezi ve tıbbi konuların önemli yönlerine odaklanacaktır. Ayrıca, yüksek kaliteli bilimin programa daha fazla entegrasyonu, bir dizi eğitim seansı ve rejeneratif diş hekimliği, yeni teknolojiler ve en son araştırmalar gibi daha geniş disiplinler ile ilgili konular da olacaktır. Online kongre 2021’in sloganı “Araştır, Öğren, Keşfet” dir. Yeni ve ilgi çekici dental teknikleri en basit şekilde öğrenin, bunları kendiniz deneyimleyin! Kongre bilimsel ve eğitim programını yalnızca dijital formatta sunmak için dönüm noktası niteliğinde bir karar aldık. Program, basılı bir kopya yerine, kullanıcıların tüm oturumlara kolayca göz atabilecekleri, kendi kişisel programlarını oluşturabilecekleri ve ilgilendikleri özetleri indirip yazdırabilecekleri kongre web sitesinde bulunacaktır. Tüm bu özellikler, ücretsiz olarak indirilebilen ve Mayıs 2021’den itibaren kullanıma sunulacak olan Kongre Uygulamasında da mevcut olacaktır. Kongrenin fantastik ve unutulmaz bir etkinlik olacak olacağını belirtmek isterim. 1. Uluslararası Dental Araştırmalar ve Sağlık Bilimleri Kongresinde özellikle elektronik poster ve sözlü sunumları ile bilgi alışverişine vurgu yapılarak tüm katılımcıların ilgisini çekecek pek çok konuyu bulacaklarına inanıyoruzÖğe Micro-shear bond strength of different calcium silicate materials to bulk-fill composite(PeerJ Inc., 2023) Falakaloğlu, Seda; Özata, Merve Yeniçeri; Plotino, GianlucaIntroduction: This study aimed to compare the micro-shear bond strength (µSBS) performances of two resin-based calcium silicate-based cement (CSC) (TheraCal PT and TheraCal LC), Biodentine, and two modified-MTA CSC materials (NeoMTA 2 and BioMTA+) to bulk-fill restorative material. Materials and Methods: Fifty 3D printed cylindrical resin blocks with a central hole were used (2 mm in depth and 4 mm in diameter). CSCs were placed in the holes (per each group n = 10) and incubated for 24 h. Cylindrical polyethylene molds (2 mm in height and diameter) were used to place the bulk-fill restorative materials on the CSCs and polymerize for 20 s. Then, all specimens were incubated for 24 h at 37 °C at a humidity of 100%. Specimen’s µSBSs were determined with a universal testing machine. Data were analyzed with one-way ANOVA (Welch) and Tamhane test. Results: Statistically higher µSBS was found for TheraCal PT (29.91 ± 6.13 MPa) (p < 0.05) respect to all the other materials tested. TheraCal LC (20.23 ± 6.32 MPa) (p > 0.05) reported higher µSBS than NeoMTA 2 (11.49 ± 5.78 MPa) and BioMTA+ (6.45 ± 1.89 MPa) (p < 0.05). There was no statistical difference among TheraCal LC, NeoMTA 2 and Biodentine (15.23 ± 7.37 MPa) and between NeoMTA 2 and BioMTA+ (p > 0.05). Conclusion: Choosing TheraCal PT as the pulp capping material may increase the adhesion and µSBS to the bulk-fill composite superstructure and sealing ability.Öğe Incidence of missed middle mesial canal in endodontically treated mandibular molar teeth: A cone-beam computed tomography study(NLM (Medline), 2023) Tartuk, Gizem Akın; Kaya, SadullahBackground: In endodontic treatment, the aim is to completely determine, shape, and fill all root canals in a three‑dimensional way. Missed canals lead to treatment failure. In mandibular molars, there may be an extra canal called the middle mesial canal between the mesiobuccal and mesiolingual canals. Aim: The aim of this study was to evaluate the prevalence of missed middle mesial canals in root canal-treated mandibular molar teeth. Materials and Methods: In this study, cone‑beam computed tomography (CBCT) images of 1054 patients were analyzed. We identified 121 endodontically treated mandibular molars and evaluated the prevalence of missed canals. Results: Although 33.05% of the root canal-treated teeth did not have a middle mesial canal, this canal was detected in the other 66.94%; 97.53% of teeth with a middle mesial canal could not be detected by clinicians. Conclusion: Clinicians performing endodontic treatment of mandibular molar teeth should not ignore the presence of the middle mesial canal. Thus, it is very important for clinicians to have sufficient information about the localization, morphology, and variations of the middle mesial canal.Öğe Comparison of dentinal tubule penetration of three different root canal sealers by confocal laser scanning microscopy(Wolters Kluwer, 2023) Gülmez, Hafize Kılıç; Kaya, Sadullah; Özata, Merve YeniçeriAim: This study compared three different root canal sealers in terms of depth, area, and percentage of penetration into dentinal tubules. Methods: Sixty extracted human mandibular premolars were allocated into three groups, each containing twenty teeth, and filled with either AH Plus, MTA Fillapex, or Well Root ST root canal sealers, and gutta‑percha. Horizontal sections were taken at a distance of 1, 4, and 7 mm levels from the apical of the teeth and examined under a confocal laser scanning microscope (CLSM). Statistical analysis of the data involved running a Kruskal–Wallis‑H‑test. Results: There was no significant difference between the sealers in the apical and middle sections (P > 0.05). The penetration area and depth in the coronal section were the lowest in the MTA Fillapex compared to the AH Plus sealer (P < 0.05). There was no significant difference between the sections in terms of penetration percentage (P > 0.05). Conclusion: The sealers presented similar dentinal penetration area, depth, and percentage on the middle and apical sections. In the coronal section, the values were high within three parameters.Öğe Effect of smear layer removal using different chelators on push-out bond strength of bioceramic sealer(Ariesdue Srl, 2023) Özata, Merve Yeniçeri; Kaya, Sadullah; Yolcu, Elif Nur; Okumuş, Tuğba Baz; Falakaloğlu, SedaAim: The aim of this study was to evaluate the effects of phytic acid (IP6), ethylenediaminetetraacetic acid (EDTA) and glycolic acid (GA) used as a final irrigation solution on the push-out bond strength (POBS) of a bioceramic-based root canal sealer. Methodology: The study included 60 single-root human mandibular premolars. After the teeth were decoronated, they were cleaned and shaped using the #25.08 Reciproc R25 single file system. Throughout preparation, each canal was irrigated using 20 ml 5.25% sodium hypochlorite (NaOCl). The teeth were divided into 4 group, each consisting of 15 (n=15) according to the final irrigation agent [1% IP6, 10% CI, 17% EDTA, and distilled water (DW)]. The final irrigation protocol consisted of application of 5 ml chelating agent for 1 minute followed by 5 ml 5.25% NaOCl application. Root canals were filled using Well Root ST canal sealer and Reciproc R25 gutta-percha, based on the single-cone technique. A 2-mm section was extracted from the middle part of the roots to test for POBS. Values were recorded in MPa and fracture types were examined. Groups were compared using one-way ANOVA (Welch’s) test. Results: The GA, EDTA, and IP6 groups showed no significant intergroup differences (p>0.05). EDTA and GA groups had significantly higher POBS than the DW group (p[removed]0.05). Conclusion: GA increased the bond strength of the bioceramic-based canal sealer to the root canal dentin at least as much as EDTA; IP6 exhibited similar strength to these chelators, it was not better than DW.Öğe Kök kanallarından kalsiyum hidroksidin uzaklaştırılmasında endodontik bir şelatör olarak fitik asidin etkinliği: Bir in vitro çalışma(Türkiye Klinikleri Yayınevi, 2022) Falakaloğlu, Seda; Özata, Merve Yeniçeri; Şen, Bilge Hakan; Avcı, Güliz Rana Tellioğlu; Tartuk, Gizem AkınAmaç: Bu çalışmanın amacı, kök kanallarından kalsiyum hidroksidin (KH) uzaklaştırılmasında farklı irrigasyon solüsyonu kombinasyonlarının etkinliğini karşılaştırmaktır. Gereç ve Yöntemler: Seksen sekiz adet alt premolar dişin kök kanalları genişletildi ve kökler, diş uzun aksı boyunca ikiye ayrıldı. Kök kanal yüzeyinin apikal 1/3’lük kısmında standart bir yapay oluk hazırlandı. Oluklar, KH ile doldurulduktan sonra kök yarıları birleştirildi. Ardından kanallar tamamen KH ile dolduruldu. Örnekler, 4 deney (n=20) ve 2 kontrol grubuna (n=4) ayrıldı. Gruplarda; Grup 1: %1 fitik asit (IP6), Grup 2: %1 IP6 ve devamında %5 sodyum hipoklorit (NaOCl), Grup 3: %17 etilendiamintetraasetik asit (EDTA) ve Grup 4: %17 EDTA ve devamında %5 NaOCl olacak şekilde 30-G IrriFlex irrigasyon iğnesi ile irrigasyon yapıldı. Toplam irrigasyon solüsyonlarının hacmi, her grupta 20 mL olacak şekilde belirlendi. Köklerin tekrar ayrılmasından sonra yapay oluklarda kalan KH miktarı, bir stereo mikroskop (x40) altında değerlendirildi. Veriler, daha sonra Shapiro-Wilk ve Kruskal-Wallis H testleri kullanılarak istatistiksel olarak analiz edildi (p<0,05). Bulgular: Test edilen irrigasyon solüsyonlarının hiçbiri, KH’yi oluklardan tamamen uzaklaştıramadı. Gruplar arasında istatistiksel açıdan anlamlı bir fark yoktu (p>0,05). Sonuç: EDTA, IP6 ve bunların NaOCl kombinasyonları, KH uzaklaştırma konusunda tam bir başarı sağlamadı. Bu çalışmanın bulgularına göre KH uzaklaştırmada %1 IP6’nın, EDTA’ya alternatif bir şelasyon ajanı olabileceği görüldü.Öğe Apically extruded debris and irrigants during root canal instrumentation with TruNatomy and ProTaper Gold rotary file systems(Pagepress Publication, 2021) Falakaloğlu, Seda; Özata, Merve Yeniçeri; İriboz, EmreAim: The objective of this study was to evaluate the amount of apically extruded debris and irrigants produced by TruNatomy and ProTaper Gold in mandibular incisor root canals. Methodology: Forty mandibular incisors were instrumented using TruNatomy (Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and ProTaper Gold (Dentsply Sirona, Maillefer, Ballaigues, Switzerland) rotary systems. Apically extruded debris and irrigants during instrumentation were collected into preweighed Eppendorf tubes and were assessed with an electronic scale. All the procedures were performed in a 35 degrees C hot water bath. The data were analyzed using the Shapiro-Wilk test and Mann-Whitney U test at a 5% significance level. Results: Both NiTi file systems investigated extruded debris from the apical foramen. According to the data, the TruNatomy group extruded significantly less debris and irrigant from the apical foramen than the ProTaper Gold group (p<0.05). Conclusions: All the instruments caused apical extrusion. The TruNatomy instruments extruded less debris and irrigants apically than the ProTaper Gold instruments.Öğe Farklı ısıl işlem görmüş Ni-Ti aletlerin kanal yenileme işleminde kullanımında kök kanalında kalan dolgu maddesi ve apikalden taşırdığı debris miktarının karşılaştırılması: Bir in vitro çalışma(Türkiye Klinikleri Yayınevi, 2022) Özata, Merve Yeniçeri; Falakaloğlu, Seda; Tartuk, Gizem AkınAmaç: Bu çalışmanın amacı, farklı NiTi eğe sistemleri [Scope RS® Retreatment GOLD (SRG), WaveOne Gold (WOG) ve ProTaper Gold (PTG)] kullanılarak kök kanal dolgu maddelerinin uzaklaştırılması sırasında apikalden taşan debris ve kök kanal duvarlarında kalan dolgu maddesi miktarını değerlendirmektir. Gereç ve Yöntemler: Kırk beş adet çekilmiş alt çene küçük azı dişin kök kanalları genişletilmiş ve tek kon tekniği kullanılarak gütaperka ve AH Plus kanal patı ile doldurulmuştur. SRG, WOG ve PTG eğeleri ile kök dolgu materyalinin uzaklaştırılması için dişler rastgele 15’li 3 gruba ayrıldı. Uzaklaştırma işlemi sırasında apikalden taşan debris, önceden tartılmış Eppendorf tüplerinde toplandı ve elektronik bir terazi ile ölçüldü. Kök kanallarında kalan dolgu maddesi miktarı dijital analiz programı (Image J) kullanılarak değerlendirildi. Veriler tek yönlü ANOVA testi kullanılarak analiz edildi. Bulgular: WOG eğe sistemi, PTG eğe sistemine göre anlamlı derecede apikalden daha az debris taşırırken (p=0,020); SRG eğe sistemi ile diğer 2 eğe sistemi arasında anlamlı bir farklılık bulunmadı (p=0,426, p=0,647). Kalan dolgu maddesi miktarı açısından anlamlı bir farklılık bulunmadı (p=0,308). Sonuç: Tüm gruplar apikal foramenden debris taşırdı. PTG eğe sistemi, WOG ve SRG eğe sistemlerine oranla daha yüksek seviyelerde apikal ekstrüzyona sebep oldu. Ayrıca kalan kanal dolgusu miktarı açısından gruplar arasında anlamlı bir fark bulunmadı.Öğe Comparison of sealing efficiency of mineral trioxide aggregate and biodentine used in perforation repair in acidic and neutral environments- an in-vitro study(Premchand Shantidevi Research Foundation, 2021) Yüzer, Güney Mustafa; Kaya, SadullahIntroduction: Furcation perforation is one of the complications that occur during endodontic treatment due to anatomical differences or iatrogenic causes. Repairing the perforation with a bio-compatible material eliminates the connection with the gingival sulcus and positively affects the prognosis. The sealing ability of the repair materials is very important and is affected by the conditions of the environment in which they are applied. Aim: To compare the sealing efficiency of Mineral Trioxide Aggregate (MTA) (Angelus, Londrina, PR, Brazil) and Biodentine (Septodont, Saint Maur des Fosses, France) materials used in the repair of furcation perforations in acidic and neutral environments. Materials and Methods: This in-vitro experimental study was carried out in the Department of Endodontics at Dicle University Faculty of Dentistry, Diyarbakir, Turkiye and Dicle University Science and Technology Application and Research Center from 10th June 2020 to 22nd July 2020. A total of 96 mandibular molars were used in the study. The specimens were randomly divided into two equal groups (n=48). When the perforations were repaired with MTA and Biodentine materials, each group was divided into four subgroups (n=12). These subgroups were kept in Phosphate-Buffered Saline (PBS) and Acetic Acid (AA) solutions for different periods of time from four or 34 days, and all groups were immersed in methylene blue solution. The dye penetration level of the divided sections was examined under a stereomicroscope (Leica, Wetzlar, Germany). Microleakage data of all groups were statistically analysed using Kolmogorov Smirnov, Shapiro Wilk's and Mann-Whitney U Test. Statistical significance was set at 0.05, it was stated that there was a significant difference when p-value <0.05. Results: The short-term (4 days) microleakage level of biodentine material in the AA environment was significantly lower than that of MTA material (p-value=0.005). There was no statistically significant difference between the materials in terms of long-term (34 days) microleakage levels in the AA environment (p-value>0.05). The long-term microleakage level in PBS environment of biodentine material was significantly lower than that of the AA environment (p-value=0.008). Conclusion: Lower microleakage levels were observed in the neutral environment than the acid environment with both MTA and biodentine during both holding periods.Öğe Evaluation of dentinal micro-cracks caused by the ProTaper Universal, ProTaper Next and Reciproc rotary file systems used in root canal preparation(Uluslararası Diş Araştırmaları Birliği, 2018) Taç, Meltem Deveci; Kaya, Sadullah; Falakaloğlu, SedaAim: In this study, we compared the occurrence of dentinal micro-cracksafter use of the ProTaper Universal (Dentsply Maillefer, Ballaigues,Switzerland), ProTaper Next (Dentsply Maillefer), and Reciproc (VDW,Munich, Germany) nickel–titanium rotary file systems in root canalpreparation.Methodology: One hundred mandibular anterior teeth were divided intofive groups of 20 specimens each. Group 1 served as a control, with nointervention. In group 2, preparation was performed using the step-backtechnique and K files. In groups 3–5, root canal preparation was performedusing the ProTaper Universal, ProTaper Next, and Reciproc file systems,respectively. Following preparation, specimens were sectioned at 3, 6, and9 mm using a Minitom precision cut-off machine. The sections wereevaluated under a stereomicroscope. The following scoring system wasused to rate specimens: 1, no micro-crack; 2, incomplete micro-crack; and3, vertical root fracture. The results were statistically assessed (p≤0.05).Results: No micro-crack formation was observed in groups 1 and 2. Thehighest rate of micro-crack formation was observed in specimens preparedwith the ProTaper Universal file system (20%), followed by those preparedwith the Reciproc (11.7%) and ProTaper Next (6.7%) file systems. However,no significant difference was detected among groups (p>0.05). In thegroups ProTaper Universal and Reciproc files were used, 1 vertical rootfracture was found in 9 mm sections for each.Conclusions: Considering the limitations of in vitro studies, we canconclude that all rotary file systems used in this study led to dentinalmicro-crack formation in roots. The ProTaper Universal file system causedmore dentinal micro-cracking than did the ProTaper Next and Reciproc filesystems.Öğe An evaluation using micro-CT data of the stress formed in the crown and periodontal tissues from the use of PEEK post and PEEK crown: A 3D finite element analysis study(Uluslararası Diş Araştırmaları Birliği, 2018) Tekin, Samet; Adıgüzel, Özkan; Cangül, SuzanAim: Metal-supported ceramics as crown material and glass fiber posts asdental post materials are in frequent current use. In recent years, it hasbeen claimed that stress-based biomechanical problems in dentistry canbe resolved with the benefit of the low elasticity modulus ofpolyetheretherketone (PEEK) material. The aim of this study was to usefinite element analysis (FEA) to compare the stresses formed by forcesapplied after the use of PEEK material as dental post and crown materialas an alternative to glass fiber posts and metal-supported ceramic crowns.Methodology: The stress analysis method used in this study was FEA.First, micro-computed tomography (micro-CT) images were obtained of amaxillary central incisor tooth and the data of the post materials scannedwith a 3-dimensional (3D) laser scanner were uploaded to a computerprogram. 3D models were obtained with designs made in the computerprogram of all the materials. The modelling of a maxillary central toothwas completed using 2 different post materials (glass fiber and PEEK) and2 different crown materials (metal ceramic and PEEK) and 4 groups wereformed for analysis. By applying force of 100 N at 135ofrom the absolutecentral point of the palatinal surface of the tooth, the stress values anddistribution occurring in the 3D periodontal models were compared.Results: The use of PEEK post reduced the stresses occurring on theperiodontal ligament (PDL) and the cortical bone, and caused no significantchange in the stresses on the crown. The use of PEEK crown reduced thestresses occurring on the crown and increased the stresses occurring on thePDL and cortical bone.Conclusions: With further in vitro and clinical studies of PEEK material,it can be considered that within a short time PEEK post and PEEK crowncould be in routine use in dentistry.
