scholarly journals The Relationship of High Septal Deviation, the Depth of Olfactory Fossa, and Gera Angle: Is High Septal Deviation Associated With Any Anatomic Abnormalities in the Anterior Skull Base?

2020 ◽  
pp. 014556132092640
Author(s):  
Zeynep Onerci Altunay ◽  
T. Metin Onerci
Keyword(s):  
Computed Tomography ◽  
Skull Base ◽  
Anterior Skull Base ◽  
Septal Deviation ◽  
Computed Tomography Scans ◽  
Relationship Of ◽  
The Relationship

Objective: To investigate the association of high septal deviation with the olfactory fossa depth and Gera angle. Methods: Fifty-four computed tomography scans of patients with high septal deviation were evaluated. The olfactory fossa depth and Gera angle were measured. The values of the deviated and nondeviated sides were compared. Results: No association between high septal deviation and the olfactory fossa depth and Gera angle was found. Conclusion: High septal deviation does not affect the olfactory fossa depth and Gera angle. In other words, the olfactory fossa depth and Gera angle have no association with the high septal deviation.

scholarly journals Unusual Deviation of the Main Foramen from the Root Apex

2016 ◽  
Vol 27 (5) ◽  
pp. 589-591 ◽  
Author(s):  
Marco Aurélio Versiani ◽  
Hany Mohamed Aly Ahmed ◽  
Manoel Damião de Sousa-Neto ◽  
Gustavo De-Deus ◽  
Paul Michael Howell Dummer
Keyword(s):  
Computed Tomography ◽  
Short Communication ◽  
Root Apex ◽  
Micro Computed Tomography ◽  
Tooth Type ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Substantial Distance

Abstract The relationship of the main foramen to the anatomic root apex has been the subject of several studies. Although they are anatomically close, they rarely coincide, and their distance can vary according to age or tooth type, ranging from 0.2 to 3.0 mm. The aim of this short communication was to evaluate the distance between the main foramen of independent middle mesial canals (MMCs) and the anatomical mesial root apex of mandibular first molars using the micro-computed tomography. Twenty-five mandibular first molars with MMCs were scanned (resolution of 9.9 µm), and the distance from its main foramen to the anatomical apex was evaluated. Overall, the distance ranged from 0.2 to 2.4 mm; however, in 3 specimens the distance was greater than 3 mm. This report demonstrates that the exit of the main foramen of the MMC varies considerably and could approach a substantial distance from the anatomical apex greater than previously reported in the literature.

scholarly journals Relationships among Concha Bullosa, Nasal Septal Deviation, and Sinusitis: Retrospective Analysis of 296 Cases

2016 ◽  
Vol 95 (12) ◽  
pp. 487-491 ◽  
Author(s):  
Hasan H. Balikci ◽  
M. Mustafa Gurdal ◽  
Saban Celebi ◽  
Isa Ozbay ◽  
Mustafa Karakas
Keyword(s):  
Computed Tomography ◽  
Retrospective Analysis ◽  
Causal Relationship ◽  
Significant Relationship ◽  
Septal Deviation ◽  
Concha Bullosa ◽  
Sinus Disease ◽  
Nasal Septal Deviation ◽  
Computed Tomography Scans ◽  
Paranasal Sinus Computed Tomography

We aimed to investigate the relationships among concha bullosa (CB), nasal septal deviation (NSD), and sinus disease. We retrospectively reviewed paranasal sinus computed tomography scans obtained from 296 patients—132 men and 164 women, aged 17 to 76 years (median: 39)—who had been evaluated over a 19-month period. CBs were classified as lamellar, bulbous, and extensive. In cases of bilateral CB, the larger side was designated as dominant. In all, 132 patients (44.6%) exhibited pneumatization of at least one concha, 176 (59.5%) had NSD, and 187 (63.2%) had sinus disease. Some 89 of 106 patients with unilateral or one-side-dominant CB (84.0%) had NSD, 89 of 132 patients with CB (67.4%) had sinus disease, and 109 of the 176 patients with NSD (61.9%) had sinus disease. We found a statistically significant relationship between CB and contralateral NSD, but no significant relationship between CB and sinus disease or NSD and sinus disease. While CB is a common anatomic problem that may accompany NSD, a causal relationship between CB or NSD and sinus disease is dubious.

Zygapophyseal Joint Fusion in Ankylosing Spondylitis Assessed by Computed Tomography: Associations with Syndesmophytes and Spinal Motion

2017 ◽  
Vol 44 (7) ◽  
pp. 1004-1010 ◽  
Author(s):  
Sovira Tan ◽  
Jianhua Yao ◽  
John A. Flynn ◽  
Lawrence Yao ◽  
Michael M. Ward
Keyword(s):  
Computed Tomography ◽  
Ankylosing Spondylitis ◽  
Spinal Mobility ◽  
Vertebral Level ◽  
Spinal Motion ◽  
Zygapophyseal Joints ◽  
Spinal Damage ◽  
Relationship Of ◽  
The Relationship ◽  
Level Fusion

Objective.Because zygapophyseal joints (ZJ) are difficult to visualize on radiographs, little is known about the relationship of ZJ fusion to other features of spinal damage in ankylosing spondylitis (AS). We used computed tomography (CT) to investigate the concordance of ZJ fusion and syndesmophytes, and examined the contribution of both features to spinal motion.Methods.We performed thoracolumbar CT scans (T10–T11 to L3–L4) on 55 patients. Two readers scored scans for ZJ fusion, which were compared to syndesmophyte height and extent of bridging, measured by computer algorithm at the same levels. We used multiple regression analysis to evaluate the relative contributions of ZJ fusion and syndesmophytes to spinal mobility.Results.Fifty-one percent of patients had ZJ fusion in at least 1 vertebral level. Fusion was present in 129 of 652 individual ZJ. Syndesmophytes and bridging were often present in vertebral levels without ZJ fusion, suggesting that syndesmophytes most often develop first. ZJ fusion was present in 34% of vertebral levels with syndesmophytes and 55.9% of levels with bridging, suggesting a closer association with bridging. Syndesmophytes and ZJ fusion had similar associations with the modified Schober test, but syndesmophytes were more strongly associated with limitations in lateral thoracolumbar flexion. ZJ rarely showed new fusion over 4 years.Conclusion.Thoracolumbar ZJ fusion in AS is rarely present at vertebral levels without syndesmophytes. Syndesmophytes, therefore, likely appear before ZJ fusion at a given vertebral level. Both syndesmophytes and ZJ fusion contribute to limited forward lumbar flexion, but syndesmophytes contribute more to limited lateral flexion.

scholarly journals Computed Tomography Image Analysis and Clinical Correlations of Retromaxillary Cells

2020 ◽  
pp. 014556132093696
Author(s):  
Cheng Cao ◽  
Fangwei Zhou ◽  
ZhiYan Song ◽  
Zezhang Tao ◽  
Yu Xu
Keyword(s):  
Computed Tomography ◽  
Paranasal Sinus ◽  
Maxillary Sinusitis ◽  
Anatomical Variation ◽  
Sinus Surgery ◽  
Tomography Image ◽  
Males And Females ◽  
Computed Tomography Image ◽  
Relationship Of ◽  
The Relationship

Objective: This study aimed to investigate and analyze the anatomic characteristics of the retromaxillary cell (RMC) by using computed tomography (CT) images of paranasal sinuses and to improve its identification with ethmomaxillary sinus (EMS). Methods: The paranasal sinus CT scans of 441 outpatients or inpatients in our hospital from January 2018 to October 2018 were analyzed. The incidence of RMC, EMS, Haller cell, imaging anatomical characteristics, and morphological manifestations were observed via sinus CTs. The relationship of RMC and ipsilateral maxillary sinusitis was analyzed. Results: The incidence of RMC is 83.90% (740/882). The incidence of males and females was 83.81% (414/494) and 84.02% (326/388), respectively. The incidence of bilateral (72.79%, 321/441) was much higher than that of unilateral (22.22%, 98/441). The lateral extension of the RMC ranged from 1.18 to 13.31 mm, with an average of 6.10 ± 2.03 mm. The incidence of ipsilateral maxillary sinus opacification on the RMC sides and non-RMC sides has no significance difference (χ2 = .054, P = .459). The incidence of Haller cell and EMS decreased significantly in the presence of RMC ( P < .01). Conclusion: The RMC is an anatomical variation originating from posterior ethmoid cells, which is commonly encountered in the clinic. The pneumatization of RMC is highly variable, and a bilateral is common. During endoscopic sinus surgery, it is necessary to carefully identify such an air cell to ensure the complete opening of the paranasal sinus during surgery.

Role of targeted magnetic resonance imaging sequences in the surgical management of anterior skull base pathology

2016 ◽  
Vol 131 (S1) ◽  
pp. S57-S61
Author(s):  
S Chawla ◽  
J Bowman ◽  
M Gandhi ◽  
B Panizza
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Skull Base ◽  
Relative Advantage ◽  
Resonance Imaging ◽  
Cranial Cavity ◽  
Relationship Of ◽  
The Relationship ◽  
Neurovascular Structures

AbstractBackground:The skull base is a highly complex anatomical region that provides passage for important nerves and vessels as they course into and out of the cranial cavity. Key to the management of pathology in this region is a thorough understanding of the anatomy, with its variations, and the relationship of various neurovascular structures to the pathology in question. Targeted high-resolution magnetic resonance imaging on high field strength magnets can enable the skull base surgeon to understand this intricate relationship and deal with the pathology from a position of relative advantage.Objective:With the help of case studies, this paper illustrates the application of specialised magnetic resonance techniques to study pathology of the orbital apex in particular.Conclusion:The fine anatomical detail provided gives surgeons the ability to design an endonasal endoscopic procedure appropriate to the anatomy of the pathology.

scholarly journals PO 18235 - New tomographic method for measuring metatarsal rotation in hallux valgus

2019 ◽  
Vol 13 (Supl 1) ◽  
pp. 52S
Author(s):  
Bruno Rodrigues de Miranda ◽  
Rui Dos Santos Barroco ◽  
Leticia Zaccaria Prates de Oliveira ◽  
Mahmoud Beerens Abdul Ghani Abdul Ghani ◽  
Antonio Candido de Paula Neto ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Hallux Valgus ◽  
Weight Bearing ◽  
Alpha Angle ◽  
Metatarsal Bone ◽  
3 Dimensional ◽  
First Metatarsal ◽  
Computed Tomography Scans ◽  
Tomographic Method ◽  
The Relationship

Introduction: Hallux valgus is a 3-dimensional deformity involving an increased intermetatarsal I/II angle and a rotational deformity of the first metatarsal bone. Kim et al. developed a method for measuring the tibial sesamoid position relative to the coronal rotation of the first metatarsal bone in computed tomography scans under simulated weight-bearing conditions. Objective: To describe a method for the topographic assessment of the correction of tibial sesamoid and metatarsal pronation using computed tomography scans under simulated weight-bearing and active toe extension. Method: We performed computed tomography under simulated weight-bearing conditions with and without active toe dorsiflexion, observing the degree of metatarsal pronation and sesamoid subluxation. For measurement purposes, we used the classifications of Kim et al. and Smith et al. Results: We observed tomographic correction, both angular and rotational, by measuring the intermetatarsal angle and tibial sesamoid position, which were confirmed by the change in the alpha angle suggested by Kim et al. Discussion: Toe extension was described as a peroneus longus tendon activation test by Klemola et al., who used this maneuver to demonstrate clinical rotational correction of hallux valgus. We described the use of a tomographic technique that followed this principle to preoperatively observe the underlying factors that may affect the rotational correction of the deformity. Conclusion: The method has the capacity for correction in various planes involving derotation of the first metatarsal bone and the relationship between such derotation and the change in sesamoid position in relation to the coronal plane of the foot.

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