Comparison of Cone Beam Computed Tomography and ultrasonography with two types of probes in the detection of opaque and non-opaque foreign bodies

Aim: The aim of this study was to compare the diagnostic accuracy of intra-oral and extra-oral ultrasonographic (US) examinations performed with linear and convex probes in the detection of opaque and non-opaque foreign bodies (FBs) located in the maxillofacial area.Materials and methods: Thirteen different type of FBs were inserted into a sheep’s head: a) on the external bone surface of mandible (between the mandibular corpus and masseter muscle), b) in the intrinsic muscular tissue (in the dorsum of the tongue) and c) in the hollow structures (into the maxillary sinus of the sheep’s head). The FBs in muscle tissue were scanned intra-orally whereas FBs in bone external bone surface of mandible and in maxillary sinus were scanned both intra-orally and extra-orally. The sensitivity of cone beam computed tomography (CBCT) and US imaging methods in detection of FBs were compared for FBs on the bone surface and in the muscular tissue.Results: The intra-observer kappa coefficients provided identical values of 0.236 for the extra-oral convex probe, 0.461 for the intra-oral linear probe for overall FBs detection, which indicated notably poor to fair intra-observer agreement. The inter-observer agreement showed a poor agreement for the extra-oral use of linear probe (0.341 and 0.393) and extra-oral use of convex probe (0.319 and 0.335), However, a fair agreement was determined for use of probe intra-orally (0.530 and 0.534). Overall, the diagnostic accuracy of the CBCT was higher than the US regarding the visualization of FBs in the bone tissue.Conclusion: US with a linear probe should be the first choice for the detection of the low-radiodensity FBs, which are entrapped in the soft tissue. However, CBCT is a more sensitive technique for the visualization of FBs in air and bone tissue compared to the US, particularly for the diagnosis of high-radiodensity FBs.

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Low-dose cone-beam computed tomography in simulated condylar erosion detection: a diagnostic accuracy study

Oral Radiology ◽

10.1007/s11282-020-00474-7 ◽

2020 ◽

Author(s):

Noha Saleh Abu-Taleb ◽

Dina Mohamed ElBeshlawy

Keyword(s):

Computed Tomography ◽

Diagnostic Accuracy ◽

Cone Beam Computed Tomography ◽

Low Dose ◽

Cone Beam ◽

Diagnostic Accuracy Study ◽

Accuracy Study

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Intrusion of maxillary molar roots into the maxillary sinus in a sample of the Egyptian population using cone beam computed tomography

Egyptian Journal of Radiology and Nuclear Medicine ◽

10.1186/s43055-021-00540-y ◽

2021 ◽

Vol 52 (1) ◽

Author(s):

Esraa Ahmed Eid ◽

Fatma Mostafa El-Badawy ◽

Walaa Mohamed Hamed

Keyword(s):

Computed Tomography ◽

Maxillary Sinus ◽

Cone Beam Computed Tomography ◽

Third Molar ◽

Cone Beam ◽

Egyptian Population ◽

Maxillary Molar ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

The Right

Abstract Background The proximity of the maxillary sinus floor to the maxillary molar roots increases the probability of oroantral communication on conducting any surgical or endodontic procedure in the involved area. The aim of this study is to evaluate the relationship between each maxillary molar root and maxillary sinus floor using cone beam computed tomography. Predicting the probability of protrusion of each root into the sinus will consequently predict the probability of occurrence of the oroantral fistula in a sample of the Egyptian population. Results The total number of roots located outside the sinus was 121 (35.3%), while those contacting the sinus floor were 80 (23.3%) and those intruded the sinus were 141 (41.2%). The percentage of root intrusion into the sinus in males (56.9%) was significantly (p = 0.01) higher than females (42.9%). The probability of root intrusion in the left molars (54.2%) was non-significantly (p = 0.067) higher than that of the right side (44.3%). As for the type of tooth, the second molar showed the highest probability of root intrusion into the sinus (55.3%) followed by the third molars (52.6%) then the first molars (40.9). According to the type of root, the mesiobuccal root showed the highest probability of intrusion into the sinus (50.9%) followed by the palatal root (49.1%) then the distobuccal root (47.4%). However, the difference in both type of tooth and type of root was statistically non-significant (p = 0.051 and 0.869 respectively). As for the individual root with the highest probability of intrusion, the mesio-buccal root of the right third molar is the most frequent root to intrude the sinus (71.4%) and the mesio-buccal root of the right first molar is the least frequent (22.7%). Conclusions In a sample of the Egyptian population, males exhibit higher probability of root protrusion into the sinus than females. The side and type of tooth are of higher impact on the probability of its intrusion into the sinus compared to the type of root. Left second molars are at a higher risk of oroantral communications on surgical or endodontic procedures compared to other molars due to its highest probability of intrusion into the sinus.

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