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Öğe Accidental Displacement of Dental Implants Into Both Maxillary Sinuses During Surgery(Allen Press Inc, 2015) Eltas, Abubekir; Dundar, Serkan; Eltas, Seydanur Dengizek; Altun, Oguzhan; Yolcu, Umit; Saybak, Arif[Abstract Not Available]Öğe Comparison of the Frequencies of Dentistry Examinations Among Chronic Patients at High-Risk for COVID-19 Before and During the Pandemic: A Cross-Sectional Study(2022) Dedeoğlu, Numan; Altun, Oguzhan; Duman, Şuayip Burak; Eser, Gözde; Özen, Duygu ÇelikObjective: This study aims to evaluate the frequency of dental examinations among chronic patients, a high-risk group for the coronavirus disease-2019 (COVID-19), before and during the pandemic. Material and Methods: A total of 27,757 patient records were evalu ated. Patients with diabetes mellitus, hypertension, cardiovascular (DHC) diseases, chronic respiratory diseases and chronic kidney failure and transplant patients, cancer patients, pregnant women and patients aged above 65 years were accepted as having risky chronic health conditions for COVID-19. However, those with at least 2 or 3 of DHC diseases were considered as a separate group. The frequencies of patient groups’ dental examinations were statistically compared for the period before and during the pandemic. In addition, the frequencies of patient groups dental examinations were also compared by gender for the general pop ulation and patients over 65 years of age. Results: The frequency of den tal examinations statistically significant decreased among both male and female patients, aged over 65 years and general population during the pandemic compared to before period in DHC patients (p<0.05). There was no statistically significant decrease in the frequency of dental ex aminations during the pandemic compared to the previous period in any disease group (except DHC) in the general male population and males over 65 years of age (p?0.05). Conclusion: Risky patients in DHC group were more careful in dental examinations during the pandemic. Men with risky chronic conditions may not have been feel anxious about COVID 19 when they referred to the dentist during the pandemic.Öğe Cone beam computed tomography imaging guides for ortodontic miniscrew placement(2019) Duman, Şuayip Burak; Altun, Oguzhan; Sümbüllü, Muhammed AkifAbstract: The aim of this retrospective study is to present a guide for the clinicians by detecting the best mini screw placement areas with the measurement of cortical bone thickness in the patients who have cone beam computed tomography (CBCT) images. Additionally to be protected from root damage and a potential damage to environmental anatomic tissues, related measurements will also be held in the determined areas.This study has been evaluated by using the images of 52 patients taken by cone beam computed tomography for diagnosis and cure.In the mandibular measurements which were done by using CBCT, the buccal cortical bone thickness has been found out to increase while going towards the posterior region and going down to the apical region at the same area. In addition, it was observed mostly between second premolar and f irst molar teeth at the farthest area from the top of the crest, along the mandibular canal. The distance between base of the nose and maxillar sinus floor to the hill of the crest has also been observed that decreased towards the posterior region.Although it can vary according to the person, in mini screw applications, mandibular cortical bone structure and the interradicular range is more suitable than the upper jaw. To be protected from the potential complications and for a better stability, radiologic analysis is recommended to the patient before the mini screw placement.Öğe Cone beam computed tomography imaging of ponticulus posticus: prevalence, characteristics, and a review of the literature(Elsevier Science Inc, 2014) Bayrakdar, Ibrahim Sevki; Miloglu, Ozkan; Altun, Oguzhan; Gumussoy, Ismail; Durna, Dogan; Yilmaz, Ahmet BerhanObjective. The aim of this study was to investigate the frequency of ponticulus posticus (PP) using cone beam computed tomography (CBCT) and to describe the radiologic characteristics of the detected cases. Study Design. The presence and types of PP were investigated on 730 CBCT images. Results. PP was found in 17.4% (127) of the 730 CBCT scans. Of these 127 patients, 79 (10.8%) had bilateral PP and 48 (6.6%) had unilateral PP. Male predominance was found with a prevalence of 19.5% (54 of 277) and female prevalence was 16.1% (73 of 453). The prevalence of PP increased with age; the highest prevalence of PP was seen in those who were 49 to 81 years of age. Conclusions. This study shows that PP is not an uncommon anatomic variation and is a natural incidental finding on CBCT.Öğe Cone beam computed tomography imaging of superior semicircular canal morphology: a retrospective comparison of cleft lip/palate patients and normal controls(Taylor & Francis Ltd, 2018) Altun, Oguzhan; Duman, Suayip Burak; Bayrakdar, Ibrahim Sevki; Yasa, Yasin; Duman, Sacide; Yilmaz, Sevcihan GunenObjective: This study evaluated the prevalence and morphological characteristics of the superior semicircular canal (SSCC) in cleft lip and palate (CUP) patients using cone beam computed tomography (CBCT). Materials and methods: CBCT images of 53CL/P patients (28 males and 25 females) and a control group of 76 patients (42 males and 34 females) were evaluated. Retrospectively, 258 temporal bone images from 129 patients were evaluated in terms of SSCC morphology and divided into a normal pattern (0.6-1.7mm in thickness), a papyraceous pattern (<0.5mm), a thick pattern (>1.8mm), a pneumatized pattern and dehiscent. The chi-squared test was used to compare differences among semicircular canal dehiscence (SSCD) patterns in the CL/P and control groups; p <.05 was taken to reflect statistical significance. Results: The characteristics of the SSCC were evaluated on CBCT images in patients with CL/P and controls. In total, 158 (61%) cases were normal (0.6-1.7mm in thickness), 31 (12%) papyraceous (<0.5 mm), 8 (3%) thick, and 34 (13%) pneumatized. SSCD was observed in 27 (11%) cases. Statistically significant differences between the CL/P and control groups were evident in terms of SSCC morphology (p<.001). Conclusions: SSCD should be considered if a CL/P patient exhibits a vestibular system deficiency. Oral and maxillofacial radiologists should pay attention to SSCD when interpreting CBCT images. Future studies should use high-level spatial resolution CBCT to focus on cleft site and SSCC morphology in larger patient populations.Öğe EVALUATION OF ANATOMICAL VARIATIONS OF NASAL CAVITY AND PARANASAL SINUSES WITH CONE BEAM COMPUTED TOMOGRAPHY(Nobel Ilac, 2017) Dedeoglu, Numan; Altun, Oguzhan; Bilge, Osman Murat; Sumbullu, Muhammed AkifObjective: The aim of this study is to evaluate anatomical variations of nasal cavity and paranasal sinuses using cone beam computed tomography (CBCT), which is currently used in dentistry radiology. Material and Method: In this study, 251 patients' nasal cavities and paranasal sinuses were evaluated using CBCT (Newtom 5G, Verona Italy) images in terms of anatomical variations. The high-resolution (voxel and slice thickness: 0.2 mm) multiplanar reformatting images (MPR) were used for the evaluation of the variations. Results: The most common anatomical variation of nasal cavity and paranasal sinuses found in this study was agger nasi cell (95.6%). The most rarely observed variation was sphenoid sinus aplasia (0.8%). There was no statistically significant relationship between concha bullosa and nasal septum deviation. Conclusion: CBCT is a preferred alternative and reliable method for evaluation of anatomical variations of the nasal cavity and paranasal sinuses.Öğe Examination of Nasolacrimal Duct Morphometry Using Cone Beam Computed Tomography in Patients With Unilateral Cleft Lip/Palate(Lippincott Williams & Wilkins, 2017) Altun, Oguzhan; Dedeoglu, Numan; Avci, MehmetObjective: The cleft lip/palate (CLP) deformity negatively affects the anatomy of the nasal cavity and maxilla. The effects of this deformity on the lacrimal system have been unidentified yet. This study aimed to evaluate the morphometric changes in the nasolacrimal duct using cone-beam computed tomography (CBCT) in patients with unilateral CLP. Materials and Methods: Retrospective bilateral measurements of the narrowest transversal diameters and the lengths of the nasolacrimal ducts were made for the affected and unaffected sides of 28 patients with CLP and 28 control patients, using the CBCT images. The measurements were statistically compared. Results: The mean narrowest transversal diameter of the nasolacrimal duct for the affected side of the patients with unilateral CLP was statistically significantly narrower than the unaffected side (P=0.01). There were no statistically significant differences between the control group and the affected and unaffected sides of patient group with unilateral CLP regarding the nasolacrimal duct diameter. The differences were not statistically significant among all groups regarding the mean nasolacrimal duct length. Conclusion: The diameter of the nasolacrimal duct at the affected side of unilateral CLP was narrower than the unaffected side. According to this result, the CLP deformity can have an effect on the nasolacrimal duct diameter. However, CLP might not affect the nasolacrimal duct length.Öğe Five-year change of panoramic radiomorphometric indices and fractal dimension values in type 2 diabetes patients(Springer, 2024) Dedeoglu, Numan; Eser, Gozde; Ozen, Duygu Celik; Altun, OguzhanObjectivesDiabetes mellitus is a chronic disease characterized by dysregulation of glucose metabolism, with characteristic long-term complications accompanied by changes in bone quality. The purpose of this study is to compare the results with a control group by performing radiomorphometric analyses on panoramic radiographs obtained 5 years apart to examine changes in the mandibular bone cortex and microstructures of type 2 diabetes mellitus (T2DM) patients.MethodsTwo panoramic radiographs that were taken 5 years (mean 5.26 +/- 0.134) apart from 52 patients with T2DM (n:26) and a control group (n:26) were used. A total of 104 images were evaluated. Analyses were done from the condyle (FD1), angulus (FD2), distal second premolar apex (FD3), and anterior to the mental foramen (FD4) for fractal dimension (FD) in the mandible. Symphysis index (SI), anterior index (AI), molar index (MI), posterior index (PI), and panoramic mandibular index (PMI) measurements were taken for cortical analysis. Three-way ANOVA, three-way robust ANOVA, two-way ANOVA, and two-way robust ANOVA tests were used for statistical analysis (p < 0.05).ResultsAfter a 5-year period, there was a significant decrease in all FD measures of the mandible in both T2DM and control groups (p < 0.05). This resulted in a statistical difference in the main effect of time. After a 5-year period, no significant difference in mandibular cortical measures was identified between the T2DM and control groups (p > 0.05).ConclusionAccording to panoramic radiography, the mandibular trabecular structure deteriorated after 5 years, whereas cortical values remained the same. It concluded that T2DM had no effect on these results.Öğe In-vitro Diagnosis of Approximal Caries in Teeth Periapical Radiography with Different Exposure Parameters(Pera Yayincilik Hizmetleri, 2023) Altun, Oguzhan; Ozen, Duygu Celik; Dedeoglu, Numan; Duman, Suayip Burak; Eser, Gozde; Topaloglu, Edanur; Ozemre, BegumObjective: The aim of this study was to evaluate periapical radiographs of enamel caries, dentin caries, and deep caries with exposed pulp and intact teeth obtained in vitro using photo-stimulated phosphor plates (PSP) under different exposure parameters. Methods: 3 non-carious extracted molars were selected. The obtained molars were embedded in the wax created from pink wax by ensuring approximal contact and a base was created. 14 different imaging protocols were used with 60 kVp, 4 mA 0.02-0.1 second and 70 kVp 7 mA, 0.25-1.25 second exposure parameters. Intact teeth were imaged with these various imaging protocols. Artificial cavities were then created for enamel caries, dentin caries and deep caries with exposed pulp and imaged according to the same protocols. The images were evaluated by 3 clinicians who were blind to the exposure protocol and caries status. Inter-observer agreement with actual situations was examined with Kappa statistics. Results: In the low-dose group, the kappa values of observer 1, observer 2, and observer 3 were 0.905, 0.952, 0.952, respectively. The kappa values of observer 1, observer 2, and observer 3 in the ultralow-dose group were 0.833, 1, 1, and the kappa values of observer 1, observer 2, and observer 3 in the high-dose group were 1, 1, 0.833, respectively. The results obtained in all groups showed a statistically significant-excellent agreement (p<0.001). Conclusion: Approximal caries can be diagnosed with intraoral radiography obtained with low radiation doses with PSP in dentistry. Thus, patients could be exposed to less ionizing radiation.Öğe Morphometric and Morphologic Evaluation of the Mental Foramen in Relation to Age and Sex: An Anatomic Cone Beam Computed Tomography Study(Lippincott Williams & Wilkins, 2014) Caglayan, Fatma; Sumbullu, Muhammed Akif; Akgul, Hayati Murat; Altun, OguzhanObjective: The aim of this study was to assess the vertical and horizontal position, angle, and diameter of the mental foramen (MF) according to sex and age by cone beam computed tomography in a Turkish patient population. Methods: Cone beam computed tomography records of 192 consecutive patients consisting of 106 women and 86 men were examined, retrospectively. The vertical and horizontal positions of MF, angle and diameter of MF, and distance from MF to the alveolar crest and the base of the mandible were evaluated with respect to sex and age groups. Results: There were statistically significant differences in the distance of MF to the alveolar crest according to age groups. When we compared the right and left sides, we have only found out statistically significant differences in the angles of MF and that it was higher in the left side. Conclusions: From our results, the detection of the position of MF can provide detailed information for preoperative treatment planning (for surgery and dental implant surgery procedures), especially in the mandibular premolar region.Öğe Morphometric and morphological evaluation of mastoid emissary canal using cone-beam computed tomography(Sage Publications Ltd, 2023) Temiz, Mustafa; Ozen, Duygu Celik; Duman, Suayip Burak; Bayrakdar, Ibrahim Sevki; Kazan, Orhan; Jagtap, Rohan; Altun, OguzhanObjectives:This study aimed to determine mastoid emissary canal's (MEC) and mastoid foramen (MF) prevalence and morphometric characteristics on cone-beam computed tomography (CBCT) images to underline its clinical significance and discuss its surgical consequences. Methods:In the retrospective analysis, two oral and maxillofacial radiologists analyzed the CBCT images of 135 patients (270 sides). The biggest MF and MEC were measured in the images evaluated in MultiPlanar Reconstruction (MPR) views. The MF and MEC mean diameters were calculated. The mastoid foramina number was recorded. The prevalence of MF was studied according to gender and side of the patient. Results:The overall prevalence of MEC and MF was 119 (88.1%). The prevalence of MEC and MF is 55.5% in females and 44.5% in males. MEC and MF were identified as bilateral in 80 patients (67.20%) and unilateral in 39 patients (32.80%). The mean diameter of MF was 2.4 +/- 0.9 mm. The mean height of MF was 2.3 +/- 0.9. The mean diameter of the MEC was 2.1 +/- 0.8, and the mean height of the MEC was 2.1 +/- 0.8. There is a statistical difference between the genders (p = 0.043) in foramen diameter. Males had a significantly larger mean diameter of MF in comparison to females. Conclusion:MEC and MF must be evaluated thoroughly if the surgery is contemplated. Radiologists and surgeons should be aware of mastoid emissary canal morphology, variations, clinical relevance, and surgical consequences while operating in the suboccipital and mastoid areas to avoid unexpected and catastrophic complications. CBCT may be a reliable imaging diagnostic technique.Öğe Nasoalveolar Molding Treatment for a Patient With Amniotic Band Syndrome: A Case Report(Aves, 2014) Ozturk, Firat; Hatunoglu, Erdem; Altun, OguzhanAmniotic band syndrome (ABS) is an uncommon congenital malformation characterized by clubfoot deformity, hand and finger anomalies, and cleft lip and palate. In this study, the literature about ABS-possible etiology, treatment protocols, and medical procedures-is discussed. The aim of this study was to evaluate efficiency of nasoalveolar molding therapy for a patient with cleft lip and palate and ABS. Changes were evaluated before, during, and after the treatment period using a three-dimensional surface imaging system.Öğe Radiographic evaluation of third-molar development in relation to the chronological age of Turkish children in the southwest eastern Anatolia region(Elsevier Ireland Ltd, 2013) Karatas, Orhan H.; Ozturk, Firat; Dedeoglu, Numan; Colak, Cemil; Altun, OguzhanTo study the chronological age of third-molar mineralisation of Turkish children from the southwest Eastern Anatolia region, the Demirjian staging method was used to determine the stage of the mineralisation of four third molars (18, 28, 38 and 48) and to compare third-molar development by sex and age with the results of previous studies. The study comprised 832 Turkish children from the southwest Eastern Anatolia region aged 6-16 years based on radiological evidence from digital orthopantomograms. The mean age of the 832 patients was 11.03 +/- 1.98 years, with 424 males (mean age, 10.97 +/- 1.97) and 408 females (mean age, 11.09 +/- 2.00). The orthopantomograms were scored by two observers. The Wilcoxon matched-pairs signed-rank test used to assess intra-and inter-observer assessment revealed strong agreement between both observers' measurements. Statistical analysis of the association between sex and age was performed with the Mann-Whitney U-test and the Wilcoxon test. Regression analysis was performed to obtain regression formulae for calculating the dental and the chronological age. The statistical analysis showed a strong correlation between age and third-molar development in males (R-2 = 0.61) and females (R-2 = 0.63). New equations (age = 7.49 + 0.69, development stage (DS) 38 + 0.70, DS18) were derived for estimation of the chronological age. The results showed that there was no significant difference in mineralisation between 18 and 28 and 38 and 48 in males or females. For both sexes, the dental age was lower than the chronological age. Males reached the developmental stages earlier than females. In the whole population, the boys' and the girls' dental ages were 0.84 years and 0.16 years earlier, respectively, than their chronological ages. The use of third-molar teeth as a developmental marker is suitable, particularly when comparing the obtained standard deviation with other skeletal-age calculation techniques. (C) 2013 Elsevier Ireland Ltd. All rights reserved.Öğe Sphenoid sinus agenesis and sella turcica hypoplasia: very rare cases of two brothers with Hamamy syndrome(Springer France, 2020) Duman, Suayip Burak; Dedeoglu, Numan; Arikan, Busra; Altun, OguzhanHamamy syndrome (HS) is an autosomal recessive syndrome with a genetic origin that is very rarely observed. The syndrome with craniofacial dysmorphisms, including midface prominence, severe telecanthus, sparse lateral eyebrows, protruding ears, fronto-nasal abnormalities, lacrimal-salivary apparatus agenesis, thin upper vermillion border, myopia, mental retardation, sensorineural hearing impairment, congenital heart anomalies with intraventricular conduction delay, hypochromic microcytic anaemia and skeletal abnormalities of the long bones with recurrent fractures. In this paper, we report a case of two brothers diagnosed with HS at the ages of 25 and 18 years, visited out clinic at different times due to dental reasons. In the radiological examinations, it was observed that both brothers have sphenoid sinuses agenesia, and their sella turcica were smaller than normal. HS may be observed very rarely, and it should be kept in mind that, in addition to various symptoms, it may also cause sphenoid sinus agenesis and sella turcica hypoplasia as shown for the first time in this case report.Öğe Unusual bifid crista galli in a patient with cleft lip and palate(Springer, 2017) Dedeoglu, Numan; Altun, Oguzhan; Kucuk, Eyup Burak; Altindis, Sedat; Hatunoglu, ErdemOne of the most common craniofacial malformations observed in newborn babies is cleft lip and palate (CLP). This syndrome presents with some anatomic variations. The aim of this study was to understand an anatomic variation of the crista galli that had not been reported previously in patients with CLP. A 17-year-old boy with CLP was referred to an orthodontic clinic for cone-beam computed tomography (CBCT) imaging before treatment. Axial and coronal sections and three-dimensional images showed that the crista galli had bifid heads that were attached to each other. Incomplete ossification had resulted in a bifid crista galli and the appearance of a suture in the anterior coronal section of the CBCT images. This anatomic variation could allow penetration of the anterior fossa during endoscopic surgery, which could be dangerous for the patient.Öğe Using the fractal dimension method to assess ossification after open sinus lift surgery(2022) Sancar, Bahadır; Dedeoğlu, Numan; Çetiner, Yunus; Aral, Cüneyt Asım; Altun, OguzhanObjective: The present study aims to use the fractal dimension method to assess ossification occurring in patients undergoing an open sinus lift surgery performed with the use of xenograft. Material and Method: In our study, we used 90 orthopantomographs of a total of 43 patients. Our study consists of three groups: Group A, Group B, and Group C. Using the fractal dimension method, we assessed the orthopantomographs taken within three to six months after the open sinus lift surgery (Group A), taken after six to nine months after the open sinus lift surgery (Group B), and taken more than nine months after the open sinus lift surgery (Group C). The data were analyzed using IBM SPSS V23. The compliance of the data with the normal distribution was examined using the Shapiro-Wilk test. Result: The three-way statistics made between the mean values of the groups revealed a difference (p=0,033). The density of the xenograft material in the study area tended to decrease starting from the period of three to six months after the surgery. Conclusion: The fractal dimension method can be used to assess ossification occurring after open sinus lift surgery that is performed with the use of xenografts.
