INTRODUCTION: To evaluate discoloration of monolithic zirconia prepared in different thicknesses and sintered with various methods, following storage in coffee.
METHODS: Self-colored monolithic zirconia blocks (InCoris TZI-C-A2, Sirona)(RZ) were prepared to be in 7 mm × 7 mm × 1 mm (I) and 7 mm × 7 mm × 2 mm (K) after sintering (N=48). All samples were divided into 3-subgroups as conventional sintering(CS), rapid sintering (RS) and super-fast sintering (SFS)(n=8/subgroup). Following the initial CIELAB measurements, samples were measured again after 1-week, 2-week, 3-week and 4-week storage in coffee. The obtained color change values were analyzed statistically (SPSS26, Two-way analysis of variance in repeated measurements, one-way ANOVA).
RESULTS: Color change values in 4-week were found higher than values in 1-week, and the differences for I-CS, K-CS and K-RS groups were found statistically significant (p <0.05). According to the 1-week values, sintering methods and thicknesses had no significant effect on color change (p>0.05). According to 2-week and 3-week values, I-CS group showed significantly higher color change compared to K-CS group while according to 4-week, both I-CS and I-SFS groups showed significantly higher color change compared to K-SFS group (p<0.05).
DISCUSSION AND CONCLUSION: With the increase of storage time in coffee, color stability of conventional sintering method was found lower than the other sintering methods. Moreover, decrease in sample thicknesses caused more discoloration for conventional sintering.

INTRODUCTION: Our study aims to determine the accuracy of the analysis results obtained with artificial intelligence and evaluate them in terms of time savings and ease of use.
METHODS: Randomly selected 50 digital cephalometric radiographs were examined. Nemoceph was used to represent computer-aided cephalometric analysis, and WebCephTM was used to represent fully automatic cephalometric analysis using an artificial intelligence algorithm. Twenty-three analysis measurements, 12 angular and 11 linear, were obtained from each cephalometric image. An Independent Sample t-test was used to compare the two groups. The Intraclass correlation test evaluated the correlation between the two drawing methods.
RESULTS: For all cephalometric measurements, p was calculated as <0.001. The highest correlation value was observed in the distance measurement between L1 and NB (p<0.001). The lowest correlation was obtained in the distance measurement between AN-Perp(FH) (p<0.001 A significant difference was found in analysis creation times (p<0.05).
DISCUSSION AND CONCLUSION: As a result of our study, it has been revealed that the Webceph program, which can obtain analysis results with the artificial intelligence algorithm, can be used safely in orthodontic clinics. Making the calibration phase possible with artificial intelligence will be a significant plus of the program.

INTRODUCTION: To evaluate the Turkish videos on "Obstructive Sleep Apnea" on YouTube in terms of quality,reliability and content, and to investigate whether the videos are a reliable source.
METHODS: The words "Obstructive Sleep Apnea" were entered into the search bar on YouTube, "relevance" was selected as the ranking criterion,and the first 100 videos were evaluated. Videos were watched by a single researcher and were classified and recorded in terms of duration, number of views, likes, comments, content, upload time, target audience, source and quality. Content quality, information flow,accuracy and information precision/consistency level of the videos were evaluated. Videos were scored for specific parameters related to Obstructive Sleep Apnea and grouped into low and high quality content.The quality of the videos was assessed using the Video Information Quality Index (VIQI) and Global Quality Score (GQS).
RESULTS: When the content quality of the videos is evaluated, it was determined that 56.7% of the videos were low content and 43.3% high content. A statistical difference was found between the low and high content groups,total content, VIQI1 scores, video duration and number of likes (p<0.05). Video duration, number of likes, total content and VIQI4 score were examined, a statistically significant difference was found between different video sources (p<0.05).
DISCUSSION AND CONCLUSION: When the term "Obstructive Sleep Apnea" is searched on YouTube, it is seen that many of the results are insufficient. High quality and content videos should be shared by experts on the subject.

INTRODUCTION: This study aims to investigate the effect of silver diamine flüoride (Riva Star, Step1, SDI Dental Ltd., Australia) and silver diamine fluoride+potassium iodide (Riva Star, Step1+2, SDI Dental Ltd., Australia) on the discoloration and bond strength of two composites (Grandio Composite,Voco,Germany and Activa Presto Bioactive Stackable Light Cure Composite,Pulpdent Corp, Watertown, USA).
METHODS: Sixty extracted permanent third molars were cut at the midcoronal dentin level. Teeth were randomly divided into three groups (Group1: Control Group-Distilled water (n=20), Group2: Silver diamine fluoride (SDF)(n=20), Group 3: Silver diamine fluoride(SDF)+Potassium iodide (PI)(n=20)). The groups were randomly divided into two subgroups: GroupA: Grandio Resin Composite, GroupB: Activa Presto Bioactive Resin Composite. The discoloration levels were determined at four different stages. Bond strength was determined using the shear bond strength test. All data were analyzed by SPSS 25.0 program using Anova variance analysis and t-test.
RESULTS: It was determined that the difference between ΔE(1-2) was statistically significant (p=0.000), while the differences between ΔE(1-3) and ΔE(1-4) were not statistically significant between the groups (p=0.298, p=0.466). It was determined that the difference between the bond strength results among the groups was not statistically significant (p=0.322).
DISCUSSION AND CONCLUSION: It was concluded that applying SDF with potassium iodide instead of applying it alone before the resin composite materials had positive effects on discoloration and bond strength.

INTRODUCTION: To evaluate the knowledge and attitudes of master’s degree dental students and specialists from different dental specialization/doctorate programs regarding the necessity of cone-beam computed tomography (CBCT) in implant planning for missing single maxillary/mandibular premolar tooth.
METHODS: Participants were administered a questionnaire consisting of 14 questions aiming to determine their attitudes towards the necessity of CBCT for implant planning in missing single maxillary/mandibular premolar tooth. Demographic data was analyzed using descriptive statistics. Kruskal-Wallis, chi-square and Z tests were used to compare the total number of correct answers and the independent correct response rates for each question among different specialization/doctorate programs (p=0.05).
RESULTS: The highest number of total correct answers were obtained from the Department of Oral and Maxillofacial Radiology, whereas the department with the lowest number of total answers was Oral and Maxillofacial Surgery (p>0.05). The total correct response rates obtained from different specialization/doctorate programs were between 54% and 57%. Participants were most knowledgeable about the necessity of CBCT in determining antero-posterior bone width, while the most pronounced lack of knowledge was observed in determining vertical bone height.
DISCUSSION AND CONCLUSION: Graduate students training in different specialties and specialist dentists showed different levels of knowledge and indecisive attitude regarding the necessity of CBCT in cases of single tooth maxillary/mandibular premolar implant planning.

INTRODUCTION: This study aims to evaluate root canal treatments performed by postgraduate students at Kâtip Çelebi University's Faculty of Dentistry, Department of Endodontics, between 2015 and 2018, focusing on clinical and radiographic success rates.
METHODS: A total of 202 teeth (in 182 patients) treated by postgraduate students during 2015-2018 underwent re-examination 12 to 57 months post-treatment. Asymptomatic teeth were classified as healed if the last PAI score decreased from the initial score or was ≤ 2, as healing if bone density remained unchanged, and as failure if the last score increased or was ≥ 3. The study analyzed the influence of various factors including age, gender, tooth type/localization, coronal restoration, presence of periapical lesions, follow-up duration, and canal filling quality on treatment success, employing statistical analysis (Pearson chi-square test and Mann-Whitney U test, p<0.05).
RESULTS: Age, gender, tooth type/localization, coronal restoration, presence of periapical lesions, and follow-up time did not significantly affect treatment success (p>0.05). However, coronal restoration quality and root canal filling level were statistically significant predictors of success (p<0.05).
DISCUSSION AND CONCLUSION: Sole reliance on radiographic assessment for root canal treatment success is inadequate; clinical examination of the associated tooth is essential. Poor coronal restoration and inadequate root canal filling may lead to apical periodontitis.

INTRODUCTION: Lymphomas are a heterogeneous group of lymphoproliferative neoplasms that are morphologically classified as Hodgkin’s lymphoma and non-Hodgkin’s lymphoma (NHL). Although these pathological entities are considered to be relatively rare in the head and neck region, they are the most common non-epithelial malignant tumors following squamous cell carcinoma.
METHOD: The lesion was completely excised, wound was primarily approximated, and surgically excised enucleated mass was sent for histopathologic examination. The examination confirmed the diagnosis of DLBCL.
RESULTS: A 68-year-old male was diagnosed in our department with a 1-month history of tooth mobility in the right maxillary posterior region and discomfort while chewing on this side. In his medical history, the patient described a mass presentation in the head and right leg 3 months back; however, no treatment was administered, and the mass disappeared.
DISCUSSION AND CONCLUSION: DLBCL is the most frequent histologic NHL subtype affecting the head and neck region. Detecting DLBCL at an early stage is critical; dentists have a critical role in early diagnosis and avoiding delay in the treatment. All suspected oral lesions must be examined carefully. Attention must be given to radiographic signs, and all suspicious lesions should be sent for histopathological examination.

The medications taken are one of the major contributors to gingival overgrowth. Calcium channel blockers (such as nifedipine) can increase the formation of fibroblast and connective tissue matrix and are commonly given as antihypertensive, antiarrhythmic, and antianginal medications. In this case report, a 75-year-old female patient with stage 4 grade b periodontitis utilizing nifedipine derivatives will be shown to improve in clinical parameters with only non-surgical periodontal treatment without changing medications. Although changing or stopping the medication is usually the first treatment option for drug-induced gingival overgrowth, in some cases this is not necessary and the desired effects can only be achieved with non-surgical periodontal treatment.

Stainless steel crowns are materials that have an important place in pediatric dentistry due to their widespread clinical use. Various studies have been conducted in the literature on stainless steel crowns on primary molar and permanent first molar teeth with excessive crown damage due to reasons such as caries or hypoplasia, using different parameters such as clinical success, effect on gum health, patient and parent satisfaction. These studies increase the knowledge level of dentists and guide them in managing dental treatment and follow-up processes of these treatments in pediatric patients. Primary teeth are in relationship with permanent teeth and they guide the permanent teeth to erupt into the mouth in a healthy way. Therefore, if there is crown damage on primary teeth that cannot be treated with traditional restorations and there are no clinical findings that require extraction of the tooth, stainless steel crowns can be used. The dentist's knowledge about dental treatments applied to pediatric patients; It positively affects the diagnosis, treatment and follow-up process. This review aims to provide information about the place of stainless steel crowns in pediatric dentistry, clinical application methods, their effect on gum health, survival and clinical success.

The primary objective of bone regeneration is cellular remodeling during tissue repair and it is accurately reflecting the biological structure of the bone as closely as possible to the natural bone tissue. To achieve this, numerous studies have been conducted using supportive materials such as bone grafts, substitutes, and growth factors, and this remains an evolving field. Stem cell applications present a new research area for both clinicians and academics. Stem cells are a specialized cell group that has the ability to self-renewal and differentiation to more than one cell type by division in a specific tissue or organ. These cells possess the capacity to activate or inhibit various cellular and molecular pathways, contributing to the repair of defective sites. Mesenchymal stem cells, among the sources of stem cells, are considered an alternative treatment method in bone regeneration, and the therapeutic effectiveness of these cells is a current research topic. This review presents the mesenchymal stem cells and their regenerative potential, and also summarize the researches using these stem cells in oral and maxillofacial surgery.