Analysis of the Anatomy of the Maxillary Sinus Septum Using 3-Dimensional Computed Tomography

Preoperative evaluation of maxillary sinus anatomy is very important to avoid surgical complications due to close anatomical relations between the sinus and the posterior maxillary teeth and/or edentulous alveolar ridge. Posterior superior alveolar artery is a branch of the maxillary artery and provides the vascularization of the lateral sinus wall and underlying mucosa. Maxillary artery branches should be taken into consideration during sinus lifting procedures and bone augmentation due to increased risk of bleeding by damaging the artery during the osteotomy. Computed tomography (CT) explores three-dimensional anatomic structures and provides complex and accurate information about them. Cone Beam Computed Tomography (CBCT) offers an accurate view of the teeth and surrounding structures at high resolution, despite low-dose radiation used. In this study, the incidence of anatomical variations and sinus pathology were assessed using CBCT. The aim is to evaluate the presence of sinus pathology (sinus mucosal thickening, oro-antral communications, sinus tumors, cysts, polyps), presence and position of the posterior superior alveolar artery. These issues are important because they are about the limits of the dental implants in the posterior maxillary area. The presence of sinus pathology and anatomical variations may predispose to complications and even failures of implantation therapy.

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Faculty Opinions recommendation of 3-dimensional aortic annular assessment by multidetector computed tomography predicts moderate or severe paravalvular regurgitation after transcatheter aortic valve replacement: a multicenter retrospective analysis.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.14267348.15779552 ◽

2012 ◽

Author(s):

Lefeng Qu ◽

Jiaxuan Feng

Keyword(s):

Computed Tomography ◽

Aortic Valve ◽

Aortic Valve Replacement ◽

Multidetector Computed Tomography ◽

Retrospective Analysis ◽

Valve Replacement ◽

Transcatheter Aortic Valve Replacement ◽

3 Dimensional ◽

Transcatheter Aortic Valve

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The utility of helical computed tomography tooth pix and a 3-dimensional life-size model for treatment of squamous cell carcinoma of the mandible: A case report

Journal of Oral and Maxillofacial Surgery ◽

10.1053/joms.2002.31863 ◽

2002 ◽

Vol 60 (5) ◽

pp. 592-596 ◽

Cited By ~ 1

Author(s):

Yasunori Ariyoshi ◽

Masashi Shimahara

Keyword(s):

Computed Tomography ◽

Squamous Cell Carcinoma ◽

Case Report ◽

Cell Carcinoma ◽

Squamous Cell ◽

Helical Computed Tomography ◽

3 Dimensional ◽

Size Model

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Visualization Ability of Phase-Contrast Synchrotron-Based X-Ray Imaging Using an X-Ray Interferometer in Soft Tissue Tumors

Technology in Cancer Research & Treatment ◽

10.1177/15330338211010121 ◽

2021 ◽

Vol 20 ◽

pp. 153303382110101

Author(s):

Thet-Thet Lwin ◽

Akio Yoneyama ◽

Hiroko Maruyama ◽

Tohoru Takeda

Keyword(s):

Computed Tomography ◽

Soft Tissue ◽

Spatial Resolution ◽

Phase Contrast ◽

Soft Tissue Tumors ◽

X Ray ◽

3 Dimensional ◽

Computed Tomography Images ◽

X Ray Imaging ◽

X Ray Computed

Phase-contrast synchrotron-based X-ray imaging using an X-ray interferometer provides high sensitivity and high spatial resolution, and it has the ability to depict the fine morphological structures of biological soft tissues, including tumors. In this study, we quantitatively compared phase-contrast synchrotron-based X-ray computed tomography images and images of histopathological hematoxylin-eosin-stained sections of spontaneously occurring rat testicular tumors that contained different types of cells. The absolute densities measured on the phase-contrast synchrotron-based X-ray computed tomography images correlated well with the densities of the nuclear chromatin in the histological images, thereby demonstrating the ability of phase-contrast synchrotron-based X-ray imaging using an X-ray interferometer to reliably identify the characteristics of cancer cells within solid soft tissue tumors. In addition, 3-dimensional synchrotron-based phase-contrast X-ray computed tomography enables screening for different structures within tumors, such as solid, cystic, and fibrous tissues, and blood clots, from any direction and with a spatial resolution down to 26 μm. Thus, phase-contrast synchrotron-based X-ray imaging using an X-ray interferometer shows potential for being useful in preclinical cancer research by providing the ability to depict the characteristics of tumor cells and by offering 3-dimensional information capabilities.

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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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Utility of 3-dimensional transoesophageal echocardiography for mitral annular sizing in transcatheter mitral valve replacement procedures: a cardiac computed tomography comparative study

European Heart Journal - Cardiovascular Imaging ◽

10.1093/ehjci/jeaa356.212 ◽

2021 ◽

Vol 22 (Supplement_1) ◽

Author(s):

A Coisne ◽

F Pontana ◽

S Aghezzaf ◽

S Mouton ◽

H Ridon ◽

...

Keyword(s):

Computed Tomography ◽

Mitral Valve ◽

Valve Replacement ◽

Mitral Valve Replacement ◽

Cardiac Computed Tomography ◽

Transoesophageal Echocardiography ◽

3 Dimensional ◽

Ct Measurements ◽

Good Ability ◽

Transcatheter Mitral Valve Replacement

Abstract Funding Acknowledgements Type of funding sources: None. Background. 3-dimensional transoesophageal echocardiography (3D-TEE) is frequently used as an initial screening tool in the evaluation of patients who are candidates to Transcatheter Mitral Valve Replacement (TMVR). However, little is known about the imaging correlation with the gold-standard computed tomography (CT) imaging. We aimed at testing the quantitative differences between these two modalities and finding the best 3D-TEE parameters for TMVR screening. Methods. We included 57 patients referred to our Heart Valve Clinic for TMVR with prostheses specifically designed for the mitral valve. Mitral annulus (MA) analyses were performed using commercially available software in 3D-TEE and CT. Results. 3D-TEE was feasible in 52 patients (91%). Although 3D-TEE measurements were slightly lower than in CT, both measurements of projected MA area and perimeter showed excellent correlation with small differences between the two modalities (r = 0.88 and r = 0.92 respectively, p < 0.0001). Correlations were significant but lower for MA diameters (r = 0.68 to 0.72, p < 0.0001) and mitro-aortic angle (r = 0.53, p = 0.0001). ROC curve analyses showed that 3D-TEE had a good ability to predict TMVR screening success defined by constructors based on CT measurements with a range of 12.9 to 15cm² for MA area (AUC = 0.88-0.91, p < 0.0001), 128 to 139mm for MA perimeter (AUC = 0.85-0.91, p < 0.0001), 35 to 39mm for anteroposterior diameter (AUC = 0.79-0.84 p < 0.0001) and 37 to 42mm for posteromedial-anterolateral diameter (AUC = 0.81-0.89, p < 0.0001) (Figure 1). Conclusion. 3D-TEE measurements of MA dimensions display strong correlation with CT measurements in patients undergoing TMVR screening process. 3D-TEE should be proposed as a reasonable alternative to CT in this vulnerable population. Abstract Figure.

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