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    Comparison of cone-beam computed tomography and digital panoramic radiography for detecting peri-implant alveolar bone changes using trabecular micro-structure analysis
    (Korean Acad Oral & Maxillofacial Surgery, 2022) Magat, Guldane; Oncu, Elif; Ozcan, Sevgi; Orhan, Kaan
    Objectives: We compared changes in fractal dimension (FD) and grayscale value (GSV) of peri-implant alveolar bone on digital panoramic radiograph (DPR) and cone-beam computed tomography (CBCT) immediately after implant surgery and 12 months postoperative. Materials and Methods: In this retrospective study, 16 patients who received posterior mandibular area dental implants with CBCT scans taken about 2 weeks after implantation and one year after implantation were analyzed. A region of interest was selected for each patient. FDs and GSVs were evaluated immediately after implant surgery and at 12-month follow-up to examine the functional loading of the implants. Results: There were no significant differences between DPR and CBCT measurements of FD values (P>0.05). No significant differences were observed between FD values and GSVs calculated after implant surgery and at the 12-month follow-up (F50.05). GSVs were not correlated with FD values (P>0.05). Conclusion: The DPR and reconstructed panoramic CBCT images exhibit similar image quality for the assessment of FD. There were no changes in FD values or GSVs of the pen-implant trabecular bone structure at the 12-month postoperative evaluation of the functional loading of the implant in comparison to values immediately after implantation. GSVs representing bone mass do not align with FD values that predict bone microstnictural parameters. Therefore, GSVs and Ws should be considered different parameters for assessing bone quality.
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    Effect of Maxillary Sinus Anatomy on Bone Gain After Lateral Window Sinus Floor Elevation: A Case-Control Study
    (Quintessence Publishing Co Inc, 2023) Babayigit, Osman; Oncu, Elif; Magat, Gueldane; Orhan, Kaan
    Purpose: To evaluate the effect of maxillary sinus anatomy on sinus floor elevation (SFE) operations performed with the lateral window approach. Materials and Methods: CBCT and digital panoramic radiographs were evaluated before and at least 6 months after maxillary sinus floor elevation (SFE) operations performed in 33 maxillary sinus regions in 26 patients. Maxillary sinus volume, grafted volume (GV), sinus width (SW), residual bone height (RBH), and vertical graft resorption (VGR) were calculated. The effects of RBH and SW on GV and VGR were evaluated statistically. Results: The mean GV values in the maxillary sinuses classified as narrow, average, and wide were 2.60 & PLUSMN; 0.57, 3.44 & PLUSMN; 0.65, and 3.70 & PLUSMN; 0.64 cm3, respectively. The mean VGR was 2.12 & PLUSMN; 1.67 mm, and in the sites classified as narrow, average, and wide, the mean VGR values were 1.50 & PLUSMN; 0.79, 1.58 & PLUSMN; 1.28, and 3.46 & PLUSMN; 2.06 mm, respectively. A statistically significant difference in GV and VGR was found between the SW groups. The mean posterior maxillary RBH was 2.30 & PLUSMN; 1.05 mm, and 17 and 16 sinuses were classified as & LE; 2 and > 2 mm, respectively. There was no statistically significant difference in the effect of RBH on GV or VGR. Conclusion: Although posterior maxillary RBH did not affect new bone formation in the sinuses grafted only with hydroxyapatite-derived inorganic bovine bone, with increasing SW, the GV decreased and the VGR increased.
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    Evaluation of Operator and Patient Doses after Irradiation with Handheld X-ray Devices
    (Mdpi, 2023) Altindag, Ali; Eren, Hakan; Orhan, Kaan; Gorgun, Sebahat
    This study aimed to evaluate radiation doses from handheld X-ray devices, specifically NOMAD Pro 2TM (DvcN), Rextar X (DvcRX), and Diox 602 (DvcD), targeting operator and patient's critical organs and tissues. Calibrated TLD-100H dosimeters were placed on a mannequin and phantom head, focusing on the eyes, thyroid, gonads, hands, and salivary glands. Using a TLD reader, absorbed equivalent doses post irradiation were assessed. Conventional systems yielded higher radiation doses than phosphor plates and digital systems. Notably, implementing protective measures resulted in significant (p < 0.05) dose reductions to the operator. Peak measurements without protection included: gonad 24.4 (DvcN) mu Gy; thyroid 30.5 (DvcN) mu Gy; right eye 31.9 (DvcN) mu Gy; left eye 27.9 (DvcN) mu Gy; right hand 111.6 (DvcRX) mu Gy; and left hand 71.7 (DvcD) mu Gy. Radiation dose reductions ranged from 11.49% to 93.25%, depending on the region and device. It is imperative to adhere to radiological protection protocols, particularly when employing handheld X-ray devices; optimally, these should be used with digital systems.
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    Evaluation of the mandibular trabecular bone in patients with bruxism using fractal analysis
    (Springer, 2021) Gulec, Melike; Tassoker, Melek; Ozcan, Sevgi; Orhan, Kaan
    Objective The aims of this study were (1) to investigate the effect of bruxism on the fractal dimension (FD) of the mandibular trabecular bone through digital panoramic radiographs, and (2) to evaluate the effectiveness of fractal analysis as a diagnostic test for bruxism. Methods One hundred and six bruxer and 106 non-bruxer patients were included in the study. Three bilateral regions of interest (ROI) were selected: ROI-1, the mandibular condyle; ROI-2, the mandibular angle; ROI-3, the-area between the apical regions of the mandibular second premolar and the first molar teeth. FD values for the bruxer and non-bruxer groups were compared for each ROI. Results Only the FD measurements for the right mandibular condyle (ROI-1) showed a statistically significant difference (p = 0.041) between the bruxer and non-bruxer individuals. FD values measured in the bruxers (1.40 +/- 0.09) were lower than in the non-bruxers (1.42 +/- 0.08). Conclusion Fractal analysis may be a useful method for discerning trabecular differences in the condylar areas of bruxer individuals. In future studies, the unilateral mastication habits, the characteristics of dental wear, and the occlusal bite forces of individuals should be documented.
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    A HUGE LESION IN THE MAXILLARY POSTERIOR REGION DIAGNOSED HIGH GRADE MUCOEPIDERMOID CARCINOMA OF MINOR SALIVARY GLANDS: A CASE REPORT
    (Dokuz Eylul Univ Inst Health Sciences, 2022) Magat, Guldane; Ozcan, Sevgi; Yuce, Fatma; Cetin, Mine; Guven, Mehmet Esad; Eravci, Fakih Cihat; Orhan, Kaan
    Mucoepidermoid carcinoma (MEC) is the most common malignant tumor of the salivary glands. These tumors occur commonly in the major salivary glands, especially the parotid, and they are the most frequently located in the palate intraorally. The similarity between MEC and other odontogenic cysts in the mouth is a critical situation that needs attention in clinical examination. Early diagnosis is very important in the diagnosis of asymptomatic growth, reaching very large sizes easily, its recurrence potential, and malignant character. The treatment and prosthetic rehabilitation of MEC are specified according to histopathological grade, location, and invasion pattern of the tumors. The purpose of this case is to present a 19-years-old female with high-grade MEC of minor salivary glands at the palate.
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    Is the maxillary sinus volume affected by concha bullosa, nasal septal deviation, and impacted teeth? A CBCT study
    (Springer, 2020) Tassoker, Melek; Magat, Guldane; Lale, Bekir; Gulec, Melike; Ozcan, Sevgi; Orhan, Kaan
    Purpose Various mechanisms play an important role in the growth of maxillary sinus cavities. The purpose of this study was to investigate the correlations of maxillary sinus volume (MSV) with nasal septal deviation (NSD), concha bullosa (CB) and impacted teeth using cone-beam computed tomography (CBCT) images. Methods From 55 patients, a total of 110 maxillary sinus images were obtained and examined. Data including age, gender, impacted third molar, canine teeth, NSD, and CB were examined. MSV was measured using the MIMICS software (Materialise HQ Technologielaan, Leuven, Belgium). All statistical analyses were performed using the SPSS (Statistical Package for Social Sciences, version 21) software and p values < 0.05 were considered to indicate statistical significance. Results Mean volume of the right maxillary sinus was 13.566 cm(3), while the left was 13.882 cm(3). The rate of patients with right and left impacted third molar teeth was 49.1% and 47.3%, respectively. The rate of right and left impacted canines was 1.8% and 5.5%, respectively. NSD was found in 56.4% of CBCT examinations and right and left CB were observed in 30.9% and 32.7% of the patients' examinations, respectively. Males had a significantly higher mean sinus volume than females for both sides (p < 0.05). There were no significant correlations between MSV and age (p > 0.05). No significant differences were found between MSV and impacted teeth, NSD and CB (p > 0.05). Conclusion NSD, CB, impacted teeth, and age were not found to be related to MSV. Gender had an effect on MSV and males had higher mean sinus volume than females.