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Öğe A Diagnosis of Maxillary Sinus Fracture with Cone-Beam CT: Case Report and Literature Review(Thieme Medical Publ Inc, 2014) Yilmaz, Selmi Yardimci; Misirlioglu, Melda; Adisen, Mehmet ZahitThe purpose of this article is to present the case of maxillofacial trauma patient with maxillary sinus fracture diagnosed with cone-beam computed tomography (CBCT) and to explore the applications of this technique in evaluating the maxillofacial region. A 23-year-old male patient attempted to our clinic who had an injury at midface with complaints of swelling, numbness. The patient was examined before in emergency center but any diagnosis was made about the maxillofacial trauma. The patient re-examined clinically and radiographically. A fracture on the frontal wall of maxillary sinus is determined with the aid of CBCT. The patient consulted with the department of maxillofacial surgery and it is decided that any surgical treatment was not necessary. The emerging technique CBCTwould not be the primary choice of imaging maxillofacial trauma. Nevertheless, when advantages considered this imaging procedure could be the modality of choice according to the case.Öğe Age estimation using maxillary canine pulp/tooth area ratio, with an application of Kvaal's methods on digital orthopantomographs in a Turkish sample(Taylor & Francis Ltd, 2014) Misirlioglu, Melda; Nalcaci, Rana; Adisen, Mehmet Zahit; Yilmaz, Selmi; Yorubulut, SerapThe present study was designed to test the applicability of Kvaal's method on digital orthopantomographs and to develop a new formula measuring pulp/tooth area ratio from periapical X-rays in a group of individuals living in Central Anatolia. Orthopantomographs and periapical X-rays of 114 patients aged between 17-72 years were selected. According to reported technique, three mandibular teeth were evaluated in each orthopantomogram with Kvaal's method. Additionally, the pulp/tooth area ratio was measured on periapical X-rays of maxillary canine. Correlations between real age and morphological variables were calculated for all teeth using Pearson's correlation coefficient. Kvaal's method on digital panoramic radiographs gave acceptable results (standard deviation, SD = 5.9 to 7.9 years) that were close to the original. In addition, regression equations were developed to estimate age from morphological variables and the best results were achieved using the regression equation for the maxillary canine with a pulp/tooth area ratio (standard error of estimate, SEE = +/- 6.75; coefficient of determination R-2 = 0.67). There was no significant difference between observed and estimated age for age groups and gender based on the established regression equations. With this particular study group, the equations presented in the study gave more accurate results than Kvaal's original equations and may be considered more suitable for a Turkish population.Öğe Assessment of Third Molar Impaction Pattern and Associated Clinical Symptoms in a Central Anatolian Turkish Population(Karger, 2016) Yilmaz, Selmi; Adisen, Mehmet Zahit; Misirlioglu, Melda; Yorubulut, SerapObjectives: The purpose of this study was to assess the pattern of third molar impaction and associated symptoms in a Central Anatolian Turkish population. Material and Methods: A total of 2,133 impacted third molar teeth of 705 panoramic radiographs were reviewed. The positions of impacted third molar teeth on the panoramic radiographs were documented according to the classifications of Pell and Gregory and of Winter. The presence of related symptoms including pain, pericoronitis, lymphadenopathy and trismus was noted for every patient. Distributions of obtained values were compared using the Pearson. 2 test. Nonparametric values were analyzed using the Mann-Whitney U test and Kruskal-Wallis test. Results: The mean age of the subjects was 30.58 +/- 11.98 years (range: 19-73); in a review of the 2,133 impacted third molar teeth, the most common angulation of impaction in both maxillaries was vertical (1,177; 55%). Level B impaction was the most common in the maxilla (425/1,037; 39%), while level C impaction was the most common in the mandible (635/1,096; 61%). Pain (272/705; 39%) and pericoronitis (188/705; 27%) were found to be the most common complications of impaction. Among 705 patients (335 males, 370 females), pericoronitis was more prevalent in males (101; 30%) and usually related to lower third molars (236; 22%). The retromolar space was significantly smaller in females (p < 0.05). Moreover, there was a significant difference in retromolar space for the area of jaw (maxillary: 11.3 mm; mandibular: 14.2 mm) and impaction level (A: 14.7 mm; B: 11.1 mm; C: 10.3 mm; p < 0.05). Conclusion: The pattern of third molar impaction in a Central Anatolian Turkish population was characterized by a high prevalence rate of level C impaction with vertical position. Pain and pericoronitis were the most common symptoms usually associated with level A impaction and vertical position. (C) 2015 S. Karger AG, BaselÖğe Comparison of mastoid air cell volume in patients with or without a pneumatized articular tubercle(Korean Acad Oral & Maxillofacial Radiology, 2022) Adisen, Mehmet Zahit; Aydogdu, MervePurpose: The aim of this study was to compare mastoid air cell volumes in patients with or without a pneumatized articular tubercle (PAT) on cone-beam computed tomography (CBCT) images. Materials and Methods: The CBCT images of 224 patients were retrospectively analyzed for the presence of PAT. The Digital Imaging and Communications in Medicine data of 30 patients with PAT and 30 individuals without PAT were transferred to 3D Doctor Software. Mastoid air cell volumes were measured using semi-automatic segmentation on axial sections. Data were analyzed using SPSS version 20.0. Results: The patients with PAT and those without PAT had a mean mastoid volume of 6.31 +/- 2.86 cm(3) and 3.25 +/- 1.99 cm(3), respectively. There were statistically significant differences in mastoid air cell volumes between patients with and without PAT regardless of sex and mastoid air cell side (P<0.05). Conclusion: The detection of PAT on routine dental radiographic examinations might be a potential prognostic factor that could be used to detect extensive pneumatization in the temporal bone. Clinicians should be aware that there may be widespread pneumatization of mastoid air cells in patients in whom PAT is detected. Advanced imaging should be performed in these cases, and possible complications due to surgical interventions should be considered. (Imaging Sci Dent 20210153)Öğe Correlation of upper airway radiographic measurements with risk status for obstructive sleep apnea syndrome in young dental patients(Elsevier Science Inc, 2017) Adisen, Mehmet Zahit; Misirlioglu, Melda; Yorubulut, Serap; Nalcaci, RanaObjective. The aim of the present study is to compare radiographic measurements of the upper airway (UA) in young adult patients with different levels of risk status for obstructive sleep apnea syndrome. Study Design. The study included 50 patients between 18 and 30 years of age who were referred for dental examination and evaluation of impacted third molars. Case record forms, including habit history, along with the Berlin Questionnaire and the Epworth Sleepiness Scale, were completed by the patients and their relatives. According to the answers, 25 low-risk patients and 25 high-risk patients were selected. Cephalometric radiographs and cone beam computed radiography images were obtained for radiographic analysis when the patients were admitted into the study. Results. There were significant differences in body mass index, neck circumference measurements, Epworth score, and smoking status between risk groups. There were significant differences for UA measurements on radiographic evaluation. Body mass index (BMI) was found to be correlated positively with neck circumference and Epworth scores and negatively with UA measurements for all patients. Velopharyngeal measurements showed the highest correlation with Epworth scores, BMI, and neck circumference. Conclusions. The radiographic findings correlated with the survey results. Our data suggest that radiographic measurements of UA may be used as a predictor of risk for obstructive sleep apnea syndrome in a young population.Öğe Differential Diagnosis of Parotid Lipoma in a Breast Ca Patient(Hindawi Ltd, 2017) Misirlioglu, Melda; Akyil, Yagmur Yilmaz; Adisen, Mehmet Zahit; Okkesim, AlimeLipomas are common benign tumors usually detected on the torso, neck, upper thighs, and upper arms. However, they are rarely found in the parotid gland region. Because of their rarity at this site, they are not often considered in the differential diagnosis of parotid tumors. This report describes a rare case of a lipoma in the superficial lobe of parotid gland. A 71-year-old female patient admitted to our department complaining about swelling and pain in the posterior area of the left mandibular region since one month. Her medical history included mastectomy after breast CA fifteen years ago. Clinical examination revealed a smooth-surfaced, soft, and painful mass, with well-defined margins in the left mandibular region. Differential diagnosis of metastasis, inflammatory neck swellings, and benign salivary gland tumors were considered for the patient. Advanced imaging methods such as ultrasonography and contrast tomography revealed that the lesion was a lipoma of parotid gland. A surgical intervention under general anesthesia was planned for the removal of the mass; however patient refused the surgical treatment. Patient was placed on six-month periodic recall. This article reviews the radiographic appearance and differential diagnoses of lipoma in this rare location.Öğe The evaluation of the relationship between cervical vertebral anomalies with skeletal malocclusion types and upper airway dimensions(TAYLOR & FRANCIS LTD, 2020) Adisen, Sirin Rabia; Adisen, Mehmet Zahit; Ozdiler, Ferabi ErhanObjectives: To compare the prevalence of cervical vertebral anomalies (CVAs) in different skeletal malocclusions and to evaluate the relationship between upper airway dimension and vertebral anomalies. Methods: A retrospective study was performed on lateral cephalometric radiographs of 2062 patients aged 7-49 years. Skeletal malocclusion type, presence of CVAs, and upper airway area of 1856 patients who met the inclusion criteria of the study were recorded. The obtained data were transferred to the SPSS program for statistical analysis. Results: The mean age of the patients was 13.8 +/- 3.7 years. The prevalence of CVAs was 45.7%. There was no significant difference in prevalence between skeletal malocclusions (p = 0.89). According to airway measurements, no significant difference was found between patients with and without CVAs (p = 0.718). Conclusion: The present results suggest that there is no direct effect of skeletal malocclusion type and upper airway dimension in the etiology of CVAs.Öğe Oral cancer knowledge among Turkish dental patients(Medknow Publications & Media Pvt Ltd, 2013) Misirlioglu, Melda; Nalcaci, Rana; Yardimci, Selmi Yilmaz; Adisen, Mehmet ZahitAims: To determine the level of oral cancer awareness and knowledge among patients referred to the Department of Oral and Maxillofacial Radiology in Central Anatolia. Settings and Design: The study was conducted with 1,125 patients who applied to the school of dentistry for routine dental examinations. The authors collect information with a 20-item written questionnaire from the participants about oral cancer risk factors, epidemiology, etiology, and signs and symptoms. Statistical Analysis: Descriptive statistics of demographic variables and other data were reported as means and percentages. Statistical analysis was performed by means of SPSS 11.0 statistical package. Results: Overall, only 48.9% of all patients showed awareness of oral cancer, with awareness especially poor among lower socioeconomic groups. Awareness of oral cancer risk factors and signs and symptoms did not vary significantly between men and women (P > 0.5); however, older participants (aged 40-64 years) were more familiar with oral cancer signs than younger participants. More than half of all participants (56.8%) were unaware of the common clinical presentations of oral cancer. Conclusions: The results of this survey showed knowledge regarding oral cancer to be quite low. Thus, educational programs are needed to increase public awareness about oral cancer, and dentists should request patients undergo examinations for oral cancer to ensure early detection.Öğe A possible association of idiopathic osteosclerosis with excessive occlusal forces(Quintessence Publishing Co Inc, 2014) Misirlioglu, Melda; Nalcaci, Rana; Baran, Ilgi; Adisen, Mehmet Zahit; Yilmaz, SelmiObjectives: The aim of the study was to determine the relationship between idiopathic osteosclerotic lesions and occlusal forces using the T-Scan II computerized occlusal analysis device, and to test the sensitivity of the system in occlusal analysis. Method and Materials: The study was conducted with 21 volunteers with idiopathic osteosclerosis (IO; 14 women, 7 men) aged between 17 and 62 years (mean 29.95). For every patient, seven or eight recordings were made with the T-Scan II occlusal analysis device in maximum intercuspation, and the last two (excluding any with technical problems) were chosen for evaluation. For each lesion-related area, the distribution of high occlusal forces from two different movies was analyzed. Results: In 18 patients (85.71%), lesions were observed in an area of high occlusal force, and in 13 patients (61.9%), the lesions were located at the first area subjected to high occlusal forces. The percentage distribution of high forces at a lesion related area ranged from 0% to 88%. On average, the high forces at an osteosclerotic lesion area accounted for 20% of the maximum total force. No statistical differences were observed between the measurements of the two selected recordings (P > .05). Conclusion: The findings of this study suggest a possible relationship between IO and occlusal forces and primary contacts. T-Scan II was found to be a successful diagnostic device for detecting primary contacts and excessive occlusal forces.Öğe Prevalence of ponticulus posticus among patients with different dental malocclusions by digital lateral cephalogram: a comparative study(Springer France, 2017) Adisen, Mehmet Zahit; Misirlioglu, MeldaThe aim of the present study was to investigate the prevalence of ponticulus posticus among patients with dental Angle class I, II, and III malocclusions in Middle Anatolian population. A total of 1246 cephalometric radiographs were examined in a 6 months period. Each patient was assigned an identification number, and demographic information, absence/presence of PP, if present, type of PP and type of dental malocclusion were recorded by two observers. In cases where there was any disagreement, a third observer was consulted. Distributions of obtained values were analysed using Pearson's Chi-square test. The mean age of subjects was 20.98 +/- 6.95 years (range 10-39). In the analysed sample, PP had a prevalence of 18.8 % (complete form 9.6 %, incomplete form 9.2 %). There was a significant difference between genders (p = 0.002) (more prevalent in male patients: 119/522; 23 %). No significant difference was found between age groups (p > 0.05). PP was most frequently detected in Angle class III patients (78/351; 22.2 %) but there was no significant difference between malocclusion groups (p > 0.05). In the present study, PP is found to be a relatively common anomaly in patients with dental malocclusions. Although Angle class III patients showed a higher frequency of PP, statistically no significant difference was found among dental malocclusion groups.Öğe Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters(Sage Publications Ltd, 2023) Orhan, Kaan; Kocyigit, Doruk; Firincioglulari, Mujgan; Adisen, Mehmet Zahit; Kocyigit, SedaThis study was aimed at quantifying artifacts from zygoma implants in cone-beam computed tomography (CBCT) images using different exposure parameters. Two cadaver heads, one with two zygoma implants on each side and the other for control, were scanned using 18 different exposure parameters. Quantitative analysis was performed to evaluate the hypodense and hyperdense artifact percentages calculated as the percentage of the area. Hyperdense artifacts and hypodense artifacts were detected, followed by the calculation of the hyperdense and hypodense artifact percentages in the image. In the qualitative analysis of the artifacts, the scores used were as follows: absence (0), moderate presence (1), or high presence (2) for hypodense halos, thin hypodense lines, and hyperdense lines. Artifact analysis was performed qualitatively and quantitatively using the post-hoc Tukey and Two-way ANOVA tests. As a result, in the qualitative analyses, zygoma implants showed a significant difference compared to the control group with regard to hyperdense and hypodense artifacts (p < 0.05). There was a significant difference between the means according to the FOV size arithmetic averages (p < 0.05). In terms of voxel size, the difference was found to be significant, where 400 microns showed the highest hypodense artifact while 200 microns showed the lowest hypodense artifact. In conclusion, hypodense and hyperdense artifacts were significantly higher in cadavers with zygoma implants than in controls. As FOV and voxel size increase, more hypodense artifacts are produced by zygoma implants so smaller FOV and voxel sizes should be used to prevent poor image quality of adjacent teeth.Öğe Radiographic Diagnosis of Osteochondritis Dissecans of the Temporomandibular Joint: Two Cases(Karger, 2014) Misirlioglu, Melda; Adisen, Mehmet Zahit; Yilmaz, SelmiObjective: To present two cases of osteochondritis dissecans (OCD) in temporomandibular joints (TMJs) evaluated by panoramic radiography and cone-beam computed tomography (CBCT). Clinical Presentation and Intervention: Two patients were referred to the Oral and Maxillofacial Radiology Clinic with pain, preauricular tenderness on the TMJ region and limitation of mandibular movements. An earlier panoramic radiograph revealed radiopaque lesions adjacent to the condyles. CBCT images were obtained from patients to assess the radiopacities. The CBCT scan detected irregular-type radiopaque lesions on anterior and superior aspects of the right condyle as well as degenerative osseous changes on both TMJs. Conclusion: The CBCT images revealed degenerative osseous changes and loose bodies on TMJs. The lesions were diagnosed as OCD with the help of trauma history, as well as clinical and radiographic findings. (C) 2014 S. Karger AG, BaselÖğe Stafne Bone Cavity Complicated By Periapical Infection(Coll Physicians & Surgeons Pakistan, 2016) Atil, Fethi; Adisen, Mehmet Zahit; Misirlioglu, Melda; Suer, Berkay TolgaStafne bone cavity (SBC) is an uncommon lesion of the mandible; and generally found incidentally on routine radiographic examinations. The radiographic differential diagnosis of SBC includes a variety of lesions including odontogenic cysts, benign tumors, or bone metastases. In the present case, a 22-year female patient was admitted with chief complaint of pain in the right mandibular molar area. On panoramic radiographic examination, a non-specific large radiolucent lesion related to mandibular molar teeth was detected and extra-oral surgical intervention was planned. However, on examination with cone-beam CT (CBCT), a SBC was suspected due to lack of lingual cortical plate; and intraoral surgical exploration confirmed the diagnosis showing a cavity with small inflamed salivary gland tissue. Examination with CBCT on suspicious jaw lesions helps avoid unnecessary extraoral surgical interventions.Öğe Temporomandibular Joint Involvement in Psoriatic Arthritis(Medknow Publications & Media Pvt Ltd, 2017) Okkesim, Alime; Adisen, Mehmet Zahit; Misirlioglu, MeldaPsoriasis is a chronic, papulosquamous, and an inflammatory skin disease. It has been found that between 5% and 24% of patients develop psoriatic arthritis (PA) at the same time after or even prior to skin findings. The involvement of temporomandibular joint (TMJ) is a rare condition. In this report, a-46-year-old male patient was referred to our clinic with the complaint of pain in the bilateral TMJs, and a limited jaw movement. Medical anamnesis revealed he had psoriasis for the last 21 years, and developed a seronegative polyarthritis with destructive changes for 8 years. On extra-oral examination, crepitation at TMJs and limitation of jaw movements was detected. The radiographic examination with cone-beam CT revealed the bilaterally decreased joint spaces, erosion, and the loss of cortical edge of the joint on the condylar heads. The definitive diagnosis of PA was made with the help of patient's history and radiological findings. The uses of non-steroidal anti-inflammatory drugs and occlusal splint have been suggested for conservative treatment.Öğe The effect of imaging programs and segmentation methods on the accuracy of volume measurements of teeth(Elsevier Science Inc, 2024) Aydogdu, Merve; Adisen, Mehmet Zahit; Ertas, GulsahObjective. This study investigated whether there are differences between software programs, voxel sizes, segmentation techniques, and intraoral scanners in terms of volume measurement in incisor teeth. Study Design. Thirty extracted teeth were scanned using a 3D intraoral scanner. Physical volumes were measured using the water displacement method (WDM) as the gold standard. Cone beam computed tomography images were taken at two voxel sizes (0.30.4 mm voxel). The volumes of the teeth were calculated using the manual segmentation technique in the 3D Doctor and ImageJ (Fiji) Program, manual and automatic segmentation methods in the ITK-Snap program, and automatic segmentation methods in the 3D Slicer program. The data were analyzed using the Statistical Package for Social Sciences (SPSS, v 20.0). Results. There is a significant difference between WDM and 3D Doctor volume measurements at the voxel size of 0.4 mm (P < .05). The 3D Doctor program showed more than 13% difference compared to the WDM. There is no significant difference between WDM, intraoral scanner, ITK-Snap, ImageJ (Fiji), 3D Slicer, and 3D-Doctor volume measurements at the voxel size of 0.3 mm. Conclusions. Measurements with manual segmentation in ITK-Snap and ImageJ programs give the closest results to the physical volume measurements of the teeth. The automatic segmentation method in ITK-Snap and 3D Slicer programs may be preferred due to its ease of use and less time-consuming. In the 3D Doctor software, volume measurements tend to increase with larger voxel size. (Oral Surg Oral Med Oral Pathol Oral Radiol 2024;138:794-802)
