Dentijeröz kist: Kist-kron ilişkisi ve diğer görüntü özelliklerinin konik ışınlı bilgisayarlı tomografik görüntülerinde değerlendirilmesi

Amaç: Çenelerde en sık görülen ikinci kist tipi olan dentijeröz kist sürmemiş bir dişin kronu etrafında gelişir. Kistin dişe bağlanma yerinin mine-sement sınırı olduğu ve bu özelliğinin ayırıcı tanıda önemli olduğu belirtilmiştir. Ancak kist-kron ilişkisinin farklı radyografik varyasyonlarının olduğu da bildirilmiştir. Bu nedenle çalışmamızda dentijeröz kistlerin kist-kron ilişkisi ile diğer görüntü özelliklerinin (lokalizasyonu, boyutu, çevre dokulara etkisi, şekli, sınırları) konik ışınlı bilgisayarlı tomografik (KIBT) görüntülerinde incelenmesi amaçlanmıştır.Gereç ve Yöntemler: KIBT görüntüleri ve patoloji raporu olan 25 dentijeröz kist hastası çalışma grubunu oluşturdu. Kistlerin kist-kron ilişkisi ile diğer görüntü özellikleri değerlendirildi.Bulgular: Hastaların yaş aralığı 10-75, yaş ortalaması ise 43±19’du. Mandibular molar bölge kistlerin en sık görüldüğü bölge olup dentijeröz kistlerin % 40’ı dişe mine-sement sınırından, % 60’ı ise kök seviyesinden bağlanmıştı. Kist-kron ilişkisi ile yaş arasında istatistiksel olarak anlamlı (p<0.05) ilişki bulunmuştur. Sonuç: Dentijeröz kistlerde kist-kron ilişkisinde farklılıklar olabileceği göz önüne alınmalı, özellikle ileri yaşlarda görülen dentijeröz kistlerin dişe kök yüzeyinden tutunabileceği düşünülmeli ve ayırıcı tanıda sadece bu kritere güvenilmemelidir.ANAHTAR KELİMELER Ayırıcı tanı, Dentijeröz kist, Konik ışınlı bilgisayarlı tomograf

Removable denture-related oral mucosal lesions: descriptive clinical study

Objective: The aim of this study was to investigate whether there was a relationship between removable denture-related oral mucosal lesions and denture type, and demographic characteristics. Materials and Method: The age, sex, denture type, systemic condition and medication use, presence of denture-related oral mucosal lesions (DROML), their locations and patients’ awareness of above mentioned lesions were recorded for 199 patients. Pearson chi-square test was used to analyse the relationship between the DROML and denture type, and demographic characteristics of the patients. Results: Among the patients included to the study, 122 (61.3%) were female and 77 (38.7%) were male. Ninety-six patients (48.2%) exhibited DROML, whereas 103 patients (51.8%) had no DROML. No relationship was detected between DROML and age, and sex (p>0.05). The most commonly detected DROML was denture stomatitis (34.7%). Denture stomatitis was significantly more frequently seen in partial denture wearers (p<0.05), while epulis fissuratum and flabby ridge were statistically more frequent in complete denture wearers (p<0.001). Traumatic ulcer was more frequently found in mandibular complete denture wearers (p<0.05), while epulis fissuratum and flabby ridge were significantly more common in maxillary complete denture wearers (p<0.001). Among the patients with DROML, 57.3% stated that they were unaware of these lesions. Conclusion: In this study sample, the rate of DROML was high in patients wearing removable dentures (48.2%), and more than half of the patients with DROML were not aware of these lesions. Upon these findings, it is considered that removable denture wearers should follow the denture usage instructions and should be informed about the importance of periodic controls

Unilateral Maxillary Canine Agenesis: A Case Report And Literature Review

Congenital absence of maxillary permanent canines is an extremely rare condition, which may appear as part of a syndrome or as a nonsyndromic form. Nonsyndromic canine agenesis combined with other types of tooth agenesis has occasionally been described in the literature but isolated cases are rarely observed. This report presents an isolated case of maxillary permanent canine agenesis in a healthy 18-year-old female patient and a literature review on the prevalence, etiology, and differential diagnosis of the condition.PubMe

A preliminary study of dental patterns in panoramic radiography for forensic identification

Fingerprints, DNA, and dentition are the principal markers used for forensic identification. Frequently used dental characteristics for identification include evidence of dental procedures, such as restorations, root canal therapy, crowns, and extractions. The purposes of this preliminary study were to define dental parameters in panoramic radiographs to generate dental patterns for forensic identification, to evaluate intra-and inter-observer effects on the assessment of these parameters, and to determine the optimum number of parameters to be used in dental coding for diversity studies. In total, 11 dental parameters (virgin, missing, filling, crown, defect, residual root, bridge pontic, dental implant, endodontic treatment, impacted, and dental anomaly) were defined and the details of the coding were shown. Based on the definition of the specified parameters, dental patterns were determined from 169 panoramic radiographs. Overall, intra-and inter-observer agreements were 97.48% and 94.48%, respectively. The effects of each parameter on diversity were evaluated. When 4 and 6 base parameters and all 11 parameters were used, the diversities for full dentition were 99.31%, 99.95%, and 99.95% respectively. It was concluded that from panoramic radiographs with the 11 specified parameters, an optimum number of 6 parameters (virgin, missing, filling, crown, defect, and impacted) can be used readily and reliably to study the diversity of dental patterns for forensic identification

Is the Diagnosis of Calcified Laryngeal Cartilages on Panoramic Radiographs Possible?

Purpose Detecting laryngeal cartilages (triticeous and thyroid cartilages) on panoramic radiographs is important because they may be confused with carotid artery calcifications in the bifurcation region, which are a risk factor for stroke. This study assessed the efficiency of panoramic radiography in the diagnosis of calcified laryngeal cartilages using cone-beam computed tomography (CBCT) as the reference standard. Materials and Methods A total of 312 regions (142 bilateral, 10 left, 18 right) in 170 patients (140 males, 30 females) were examined. Panoramic radiographs were examined by an oral and maxillofacial radiologist with 11 years of experience. CBCT scans were reviewed by 2 other oral and maxillofacial radiologists. The kappa coefficient (κ) was calculated to determine the level of intra-observer agreement and to determine the level of agreement between the 2 methods. Diagnostic indicators (sensitivity, specificity, accuracy, and false positive and false negative rates) were also calculated. P values <.05 were considered to indicate statistical significance. Results Eighty-two images were re-examined to determine the intra-observer agreement level, and the kappa coefficient was calculated as 0.709 (P<.05). Statistically significant and acceptable agreement was found between the panoramic and CBCT images (κ=0.684 and P<.05). The sensitivity, specificity, diagnostic accuracy rate, the false positive rate, and the false negative rate of the panoramic radiographs were 85.4%, 83.5%, 84.6%, 16.5%, and 14.6%, respectively. Conclusion In most cases, calcified laryngeal cartilages could be diagnosed on panoramic radiographs. However, due to variation in the calcifications, diagnosis may be difficult.PubMedScopu

Accuracy of the use of radiographic visibility of root pulp in the mandibular third molar as a maturity marker at age thresholds of 18 and 21

Evaluation of the radiographic visibility of root pulp in mandibular third molars has been suggested as an alternative method for estimation of legal age threshold in living individuals when the root apices are mature. Here, we assessed the accuracy of this method for age thresholds of 18 and 21 years. A sample of 463 panoramic radiographs of individuals aged between 16 and 34 years was examined. The root pulp visibility of the mandibular third molars was scored; the stages ranged from 0 to 3. A receiver operating characteristic (ROC) curve and the area under the ROC curve (AUC) were used to select optimal cut-offs for 18- and 21-year-old thresholds. As prognostic predictors, the selected cut-offs were stages 1 and 2 for the 18- and 21-year-old thresholds of both sexes, respectively. For the 18-year-old threshold, the AUC, sensitivity and specificity were 0.829, 83.1% and 66.7% in females; and 0.930, 89.4% and 90.9% in males, respectively. For the 21-year-old threshold, the AUC, sensitivity and specificity were 0.874, 72.8% and 92.0% in females; and 0.906, 85.5% and 88.2% in males, respectively. The accuracy of the method for estimating the 18- and 21-year-old thresholds ranged from moderate to high. Therefore, the method must be used in conjunction with other age estimation methods, especially to predict whether a female has reached 18 years of age

Applicability of Cameriere's and Drusini's Age Estimation Methods to a Sample of Turkish Adults

Objectives: The aim of this study was to investigate the applicability of Drusini's and Cameriere's methods to a sample of Turkish people. Methods: Panoramic images of 200 individuals were allocated into two groups as study and test groups and examined by two observers. Tooth coronal indexes (TCI), which is the ratio between coronal pulp cavity height and crown height, were calculated in the mandibular first and second premolars and molars. Pulp/tooth area ratios (ARs) were calculated in the maxillary and mandibular canine teeth. Study group measurements were used to derive a regression model. Test group measurements were used to evaluate the accuracy of the regression model. Pearson's correlation coefficients and regression analysis were used. Results: The correlations between TCIs and age were -0.230, -0.301, -0.344 and -0.257 for mandibular first premolar, second premolar, first molar and second molar, respectively. Those for the maxillary canine (MX) and mandibular canine (MN) ARs were -0.716 and -0.514, respectively. The MX ARs were used to build the linear regression model that explained 51.2% of the total variation, with a standard error of 9.23 years. The mean error of the estimates in test group was 8 years and age of 64% of the individuals were estimated with an error of <+/- 10 years which is acceptable in forensic age prediction. Conclusions: The low correlation coefficients between age and TCI indicate that Drusini's method was not applicable to the estimation of age in a Turkish population. Using Cameriere's method, we derived a regression model.Wo

Assessment of second (I-2M) and third (I-3M) molar maturity indices individually and in combination (I2M+3M) and the sum of the seven mandibular teeth indices (S) for the legal age thresholds of 12 and 15 years in a Turkish sample

Bulut, Hakan/0000-0002-6698-671X; Bulut, Gulcin/0000-0002-2876-3347WOS:000604371300001The present study aimed to assess the performance of second (I-2M) and third (I-3M) molar maturity indices, the sum of both indices (I2M+3M), and the sum of the seven mandibular teeth indices (S) in terms of determining whether an individual is at least 12 or 15 years old. The panoramic radiographs of 763 individuals aged between 10-17 years were analysed. For the 12-year age threshold, I-2M was found to be the highest specific indicator for both sexes. The optimal cut-off values for the I-2M were determined to be 0.072 in females and 0.106 in males. The sensitivity, specificity, and area under the ROC curve (AUC) were 0.749, 0.978, and 0.925 in females, while they were 0.776, 0.953, and 0.925 in males, respectively. With regard to the 15-year age threshold, an optimal I-2M cut-off value of 0.026 was established for females, as it showed the best discriminative ability. The sensitivity, specificity, and AUC were 0.893, 0.779, and 0.885, respectively. For males, an optimal cut-off value of 0.593 was obtained for I2M+3M with the highest specificity (0.900) and AUC (0.931) as well as a sensitivity of 0.857. in conclusion, the identified cut-off values may represent alternative methods in forensic age diagnostics

Assessment of second (I-2M) and third (I-3M) molar maturity indices individually and in combination (I2M+3M) and the sum of the seven mandibular teeth indices (S) for the legal age thresholds of 12 and 15 years in a Turkish sample

The present study aimed to assess the performance of second (I-2M) and third (I-3M) molar maturity indices, the sum of both indices (I2M+3M), and the sum of the seven mandibular teeth indices (S) in terms of determining whether an individual is at least 12 or 15 years old. The panoramic radiographs of 763 individuals aged between 10-17 years were analysed. For the 12-year age threshold, I-2M was found to be the highest specific indicator for both sexes. The optimal cut-off values for the I-2M were determined to be 0.072 in females and 0.106 in males. The sensitivity, specificity, and area under the ROC curve (AUC) were 0.749, 0.978, and 0.925 in females, while they were 0.776, 0.953, and 0.925 in males, respectively. With regard to the 15-year age threshold, an optimal I-2M cut-off value of 0.026 was established for females, as it showed the best discriminative ability. The sensitivity, specificity, and AUC were 0.893, 0.779, and 0.885, respectively. For males, an optimal cut-off value of 0.593 was obtained for I2M+3M with the highest specificity (0.900) and AUC (0.931) as well as a sensitivity of 0.857. In conclusion, the identified cut-off values may represent alternative methods in forensic age diagnostics