Diagnostic accuracy of cone beam computed tomography and conventional multislice spiral tomography in sheep mandibular condyle fractures

Abstract

Objectives: The aim of this study was to compare diagnostic accuracy of cone beam CT (CBCT) and multislice CT in artificially created fractures of the sheep mandibular condyle. Methods: 63 full-thickness sheep heads were used in this study. Two surgeons created the fractures, which were either displaced or non-displaced. CBCT images were acquired by the NewTom 3G H CBCT scanner (NIM, Verona, Italy) and CT imaging was performed using the Toshiba Aquillon H multislice CT scanner (Toshiba Medical Systems, Otawara, Japan). Twodimensional (2D) cross-sectional images and three-dimensional (3D) reconstructions were evaluated by two observers who were asked to determine the presence or absence of fracture and displacement, the type of fracture, anatomical localization and type of displacement. The naked-eye inspection during surgery served as the gold standard. Inter-and intra-observer agreements were calculated with weighted kappa statistics. The receiver operating characteristics (ROC) curve analyses were used to compare statistically the area under the curve (AUC) of both imaging modalities. Results: Kappa coefficients of intra-and interobserver agreement scores varied between 0.56 -0.98, which were classified as moderate and excellent, respectively. There was no statistically significant difference between the imaging modalities, which were both sensitive and specific for the diagnosis of sheep condylar fractures. Conclusions: This study confirms that CBCT is similar to CT in the diagnosis of different types of experimentally created sheep condylar fractures and can provide a cost-and doseeffective diagnostic option.

Temporomandibular joint diagnostics using CBCT

“…15 The sensitivity of CBCT for assessing bone defects is dependent on the size of the defects, as demonstrated by Marques et al 16 and confirmed by Patel et al 17 in their investigations of simulated condylar lesions. Extremely small defects, that is, ,2 mm, proved to be difficult to detect, 17 although the sensitivity for detecting condylar osseous defects overall was fairly high: 72.9-87.5%.…”

Maksi̇llofasi̇yal Fraktürleri̇n Koni̇k Işinli Bi̇lgi̇sayarli Tomografi̇ İle Retrospekti̇f Olarak Değerlendi̇ri̇lmesi̇

“…Maksillofasiyal fraktürlerin KIBT ile değerlendirildiği çalışmalarda araştırmacılar genellikle dental fraktürlere odaklanmışlardır [4][5][6] . Bu konuda genellikle olgu sunumları, derlemeler, panoramik radyografi, BT ve KIBT'nin etkinliğinin karşılaştırıldığı ça-lışmalar yapılmıştır [7][8][9][10] . Bu çalışmada ise maksillofasiyal fraktürler KIBT görüntülerinde retrospektif olarak incelendi.…”

“…Mandibula yüzün en büyük ve en kuvvetli kemiği olmasına rağmen, konumu ve çıkıntılı yapısı nedeniyle maksillofasiyal travmalar sonucunda, nazal kemik fraktürlerinden sonra en sık fraktür görülen ikinci kemiktir 1 . Travma hastalarında uygun radyografik tetkikin seçimi, teşhis ve tedavi planlaması açısından çok önemli bir yere sahiptir 10 . Mandibula fraktürlerinin radyografik incelemesinde radyografların tanısal etkinliğinin ve tedaviye olan yararlılığının araştırıldığı bir çalışmada, panoramik radyografların zigomatik proses, tüber maksilla ve sfenoid kemiğin pterigoid proseslerinin süperpoze olarak mandibuler kondilin görüntü-lenmesinini zorlaştırdığı, ayrıca mandibuladaki minimal deplasmanlı veya oblik yöndeki fraktürlerin bu teknik ile net olarak izlenemediği bildirilmiştir.…”

Utilização da tomografia computadorizada para o diagnóstico da articulação temporomandibular

“…They are mainly caused by indirect forces transmitted from a distant point of the condylar area 4 . The most clinical signs found include bone deformities, difficulty opening the mouth, bad occlusion, edema in the peripheral region of the external auditory meatus 11 . The treatment options will depend on an accurate diagnosis, an imaging test that provides favorable review, as the TC 12 ( Figure 5) is required.…”