scholarly journals Bilateral Absence of Frontal Sinus and Unilateral Mandibular Hypoplasia – A Case report

2015 ◽  
Vol 5 (1) ◽  
pp. 29-32
Author(s):  
Roopika Handa ◽  
Soheyl Sheikh ◽  
P Shambulingappa ◽  
Amit Aggarwal ◽  
Ravinder Singh ◽  
...  
Keyword(s):  
Frontal Sinus ◽  
Treatment Options ◽  
East Asian ◽  
Cold Climate ◽  
Indian Woman ◽  
Warm Climate ◽  
Mandibular Hypoplasia ◽  
Bilateral Absence ◽  
Frontal Sinuses ◽  
Research And Education

Absence of frontal sinus is usually associated with various syndromes such as craniosynostosis, osteodysplasia, down syndrome etc. Geographically, absence of frontal sinus is seen usually in areas with cold climate. This paper reports a case of 18-year old Indian woman suffering from bilateral absence of frontal sinuses which was non-syndromic in conjunction with unilateral mandibular hypoplasia. The paper also highlights the clinical significance of frontal sinus which was non-syndromic absence and its rarity in warm climate such as in South East Asian regions and the treatment options of unilateral mandibular hypoplasia. DOI: http://dx.doi.org/10.3329/bjdre.v5i1.22459 Bangladesh Journal of Dental Research and Education Vol.5(1) 2015: 29-32

CARBON AND GLASS REINFORCED POLYMER BASED ON SOLVENT-FREE BINDERS RESISTANCE TO THE IMPACT OF A MODERATE COLD AND MODERATE WARM CLIMATE

2021 ◽  
pp. 114-126
Author(s):  
V.O. Startsev ◽  
◽  
A.V. Slavin ◽  
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Moisture Transfer ◽  
Mechanical Analysis ◽  
Cold Climate ◽  
Solvent Free ◽  
Warm Climate ◽  
Reinforced Polymer ◽  
Carbon Plastics ◽  
Compressive And Flexural Strengths ◽  
The Impact

In this work has been investigated the climatic resistance of carbon and fiberglass polymers for aviation purposes based on solvent-free binders VST-1208, VSE-1212, VSR-3M after 3 years of exposure of these materials in the moderate cold climate of Moscow and the moderate warm climate of Gelendzhik. The effect of destruction, post curing, plasticization of binders on the compressive and flexural strengths of carbon plastics VKU-27L, VKU-39, VKU-46 and fiberglass plastics VPS-47/7781, VPS-48/778 was determined using the methods of profilometry, moisture transfer and dynamic mechanical analysis. It is shown that while determining the state of PCM after climatic exposure, it is necessary to take into account the effects of the reversible plasticizing action of moisture. A comparison is made of the climatic resistance of the investigated materials.

Malignant melanoma arising in the frontal sinuses

1997 ◽  
Vol 111 (4) ◽  
pp. 376-378 ◽  
Author(s):  
Samuel M. Jayaraj ◽  
Jonathan D. Hern ◽  
George Mochloulis ◽  
Graham C. Porter
Keyword(s):  
Malignant Melanoma ◽  
Natural History ◽  
Nasal Cavity ◽  
Paranasal Sinuses ◽  
Frontal Sinus ◽  
Poor Prognosis ◽  
Review Of The Literature ◽  
History Of ◽  
Frontal Sinuses ◽  
Sinonasal Malignant Melanoma

AbstractSinonasal malignant melanoma is rare and usually occurs in the nasal cavity. Presentation is often varied and occurs late in the natural history of the disease, resulting in a poor prognosis. A case is reported of a patient with malignant melanoma arising from the frontal sinus who presented with a forehead swelling and progressive confusion. A review of the literature on malignant melanoma in the nasal cavity and paranasal sinuses regarding its presentation, site of origin and principles of management is discussed.

Quantifying Lateral Frontal Sinus Access: The Upper Blepharoplasty Approach

2018 ◽  
Vol 127 (3) ◽  
pp. 155-161 ◽  
Author(s):  
Toby O. Steele ◽  
Oliver Y. Chin ◽  
Michael R. Kinzinger ◽  
E. Bradley Strong
Keyword(s):  
Frontal Sinus ◽  
Neurovascular Bundle ◽  
Combined Approach ◽  
Frontal Sinuses ◽  
Upper Blepharoplasty

Objective: Despite advances in technology and instrumentation, access to the lateral frontal sinus remains a challenge for surgeons. We sought to quantify the reach and applicability of the upper blepharoplasty approach (UBA) to the frontal sinus. Methods: Twelve cadaveric specimens were obtained for anatomic research and frontal sinuses divided into 3 zones. Zone 1 was defined as medial to the supraorbital neurovascular bundle (SON). The remaining orbit was then bisected to define zone 2 (centrally) and zone 3 (laterally). Twenty-four UBAs were performed followed by 12 modified endoscopic Lothrop procedures (MELP). The ability to instrument each wall of the frontal sinus was recorded for the MELP, UBA, and combined approach. Results: The UBA provided excellent access to the lateral frontal sinus in zones 2 and 3 (89% and 100%). The MELP provided poorer access in zone 3 (67%) but improved access in zone 1 (83%-100%). Access for zone 1 through the UBA was limited. The combined approach yielded 100% access to each frontal sinus boundary. Conclusion: The MELP in combination with the UBA/lateral trephination provides excellent access to each frontal sinus boundary. The UBA provides excellent access to the lateral frontal sinus but is limited medially by the SON.

Intrusion of an incisor tooth into the contralateral frontal sinus following trauma

1993 ◽  
Vol 107 (3) ◽  
pp. 240-241 ◽  
Author(s):  
Akira Hara ◽  
Jun Kusakari ◽  
Akira Shinohara ◽  
Yuzo Yamada ◽  
Naoaki Sato
Keyword(s):  
Ct Scan ◽  
Frontal Sinus ◽  
Traffic Accidents ◽  
Facial Trauma ◽  
Skin Damage ◽  
Incisor Tooth ◽  
Upper Face ◽  
Frontal Sinuses ◽  
Missing Tooth

Although intrusions of glass fragments into the frontal sinuses are not uncommon in traffic accidents, a case with a tooth in the frontal sinus has never been reported. We report a patient with traumatic inclusion of an incisor tooth in the contralateral frontal sinus. Radiographic investigations demonstrated the tooth in the frontal sinus though no skin damage was recognized on the upper face. The usefulness of CT scan in localizing the missing tooth after facial trauma and its route of entry into the contralateral frontal sinus is discussed.

Frontal Sinus Outflow Anatomy

1997 ◽  
Vol 11 (4) ◽  
pp. 283-286 ◽  
Author(s):  
Dennis Lee ◽  
Robin Brody ◽  
Gady Har-El
Keyword(s):  
20Th Century ◽  
Frontal Sinus ◽  
Average Distance ◽  
Uncinate Process ◽  
Outflow Tract ◽  
Early 20Th Century ◽  
Drainage Patterns ◽  
Nasal Floor ◽  
Frontal Sinuses ◽  
Pyriform Aperture

Most of the studies of frontal sinus anatomy were completed 50 to 70 years ago. The information they provide is not necessarily relevant or helpful to the modem rhinologic surgeon who approaches the frontal sinus transnasally and endoscopically. We performed anatomical dissections of the outflow tract of 82 frontal sinuses in 41 cadaver heads to illustrate the various drainage patterns from the frontal sinus to the nose and to correlate these drainage sites with the distance and angle from the pyriform aperture. We found that the frontal sinus drained anterior to the uncinate process in 24 specimens (29.3%) with an average distance of 3.65 cm from the pyriform aperture and 58° from the nasal floor. The frontal sinus drained posterior to the uncinate process in 56 specimens (68.3%) with an average distance of 4.10 cm and 65 degrees from the nasal floor. In this latter group, most of the sinuses (51 specimens) drained into the ethmoid infundibulum. Two of the specimens had a hypoplastic frontal sinus with no outflow tract at all. These findings are different from those described in the early 20th century.

scholarly journals Seasonal variability in the incidence of carcinomatous meningitis

2015 ◽  
Vol 122 (3) ◽  
pp. 543-546 ◽  
Author(s):  
Angelos Koutras ◽  
Minas Sakellakis ◽  
Thomas Makatsoris ◽  
Charalabia Psachoulia ◽  
Maria Kardari ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Warm Season ◽  
Cold Climate ◽  
University Hospital ◽  
Carcinomatous Meningitis ◽  
Warm Climate ◽  
Significant Difference ◽  
The University ◽  
Official Data ◽  
Median Interval

OBJECT The aim of the study was to investigate whether there are seasonal differences in the occurrence of carcinomatous meningitis (CM), with a greater prevalence of the disease in months with higher temperatures. METHODS The authors searched the records of all patients with a diagnosis of CM from 1998 until 2013 at the University Hospital of Patras, Greece. The date of hospitalization was extracted for each patient. The cases were divided into 2 categories depending on the time of CM diagnosis. Based on the official data regarding the annual temperature distribution in this region, the authors divided the patients into 2 groups. The first group consisted of cases diagnosed with CM from October 15 to April 15 (cold climate and shorter daytime duration), whereas the second group comprised patients diagnosed between April 15 and October 15 (warm climate and longer daytime duration). RESULTS Overall, 44 confirmed cases of CM were found. The most common type of malignancy associated with the development of CM was breast cancer (27 patients), while the second most common tumor was lung carcinoma (11 patients). The median interval between the time of initial cancer diagnosis and CM was 4.5 years. Thirty-one patients were diagnosed with CM during the period between April 15 and October 15, while the remaining 13 patients developed CM between October 15 and April 15, a significant difference (p = 0.01). CONCLUSIONS Significantly more patients developed CM during the warm season of the year. To the authors' knowledge, this is the first study to provide evidence for the potential seasonal variability in CM incidence. However, these results should be validated prospectively in larger cohorts.

scholarly journals Comparison between three techniques for videosinuscopy in cattle

2016 ◽  
Vol 46 (7) ◽  
pp. 1262-1267 ◽  
Author(s):  
Fernando Zanlorenzi Basso ◽  
Eduarda Maciel Busato ◽  
Jéssica Rodrigues da Silva ◽  
Rogério Luizari Guedes ◽  
Ivan Roque de Barros Filho ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Maxillary Sinus ◽  
Paranasal Sinuses ◽  
Frontal Sinus ◽  
Surgical Approaches ◽  
Endoscopic Anatomy ◽  
Flexible Colonoscope ◽  
Frontal Sinuses ◽  
Made In

ABSTRACT: Cattle have extensive paranasal sinuses that are susceptible to disease, most commonly sinusitis. The sinuscopy can be used to evaluate these structures, although there are no descriptions of this region for endoscopic anatomy, especially regarding the trocar position and the most appropriate type of endoscope. This study aimed to standardize the surgical approaches to sinuscopy in cattle by comparing the use of three endoscopes. Four accesses by trephination (one hole for each of the maxillary and frontal sinuses) were made in eight heads of slaughtered cattle. Each hole was inspected with three endoscopes: a 10mm flexible colonoscope with up to 180º of angulation, a 10mm 0° laparoscope and a 4mm 30º arthroscope. It was observed that all regions of the maxillary sinus were better visualized with the 4mm endoscope, and the structures of this sinus were less well visualized with the 10mm laparoscope. The frontal sinus was difficult to evaluate due to the tortuosity of its bony projections, and the cranial portion was not observed by the proposed accesses. The caudal regions of the frontal sinus such as the nuchal diverticulum and the back of the orbit had the greatest number of structures visualized by the 4mm endoscope, followed by the colonoscope. The comparative analysis showed that the 4mm endoscope was most efficient and could be adapted to sinuscopy in cattle.

scholarly journals The Correlation between temperature and COVID-19 Incidence: An ecologic study

2021 ◽  
Author(s):  
Alireza Mirahmadizadeh ◽  
Alireza Heiran ◽  
Abdolrasool Hemmati ◽  
Mehrzad Lotfi ◽  
Mahsa Akbari ◽  
...  
Keyword(s):  
Incidence Rate ◽  
Disease Transmission ◽  
Cumulative Incidence ◽  
Cold Climate ◽  
Fars Province ◽  
Warm Climate ◽  
Cumulative Incidence Rate ◽  
Ecologic Study ◽  
Daily Data ◽  
Rate Method

Abstract Background It has been hypothesized that the COVID-19 is less prevalent in regions with warm climates. Here we investigated the correlation between temperature and the cumulative COVID-19 incidence rate. Method Daily data of the temperature and the cumulative COVID-19 incidence rate were obtained from meteorological stations’ reports and CORONALAB database, respectively, for every 36 counties of Fars province, southern Iran. Results A decreasing pattern in the cumulative incidence rate of COVID-19 was occurred at 20-25°C and 25-35°C for counties with the cold climate and counties with the warm climate, respectively; while it was increased at both upper and lower temperatures. Conclusion It appears that higher rates of disease transmission at temperatures below 20°C and above 35°C might be linked to people’s indoor gatherings, coupled with insufficient ventilation.

The Horizon Sign and Frontal Bar: Two Topographic Landmarks to Confirm Endoscopic Frontal Sinusotomy

2019 ◽  
Vol 160 (4) ◽  
pp. 740-743
Author(s):  
Evan S. Walgama ◽  
Andrew Thamboo ◽  
Navarat Tangbumrungtham ◽  
Noel Ayoub ◽  
Zara M. Patel ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Endoscopic Sinus Surgery ◽  
Frontal Sinus ◽  
Case Series ◽  
Acute Angle ◽  
Sinus Surgery ◽  
Consecutive Case ◽  
Landmark Identification ◽  
Frontal Sinuses ◽  
Anterior Posterior

Confirming a thorough dissection of the frontal sinus during endoscopic sinus surgery can be challenging, and some surgeons would benefit from reliable topographic landmark identification to ensure completion of this sinus dissection. We defined (1) the “horizon sign” as the curvilinear shadow of the posterior table cast superiorly upon the anterior table of the frontal sinus at the acute angle of their meeting point and (2) the “frontal bar” as a sagittal septation at the union of the anterior/posterior tables. A cadaveric study, followed by an intraoperative consecutive case series, was performed to evaluate these 2 landmarks as indicators of complete dissection. The horizon sign was extremely reliable, identified in 100% of cadaveric frontal sinuses and intraoperative frontal sinuses. The frontal bar was present in only 67% of frontal sinuses by computed tomography. In live patients, the sensitivity and specificity of the frontal bar were 62% and 95%, respectively.

Frontal Sinus Disease: Treatment Options—Frontal Drillout

1995 ◽  
Vol 112 (5) ◽  
pp. P45-P45
Author(s):  
Charles W. Gross ◽  
Daniel G. Becker ◽  
William E. Gross
Keyword(s):  
Frontal Sinus ◽  
Treatment Options ◽  
Frontal Sinusitis ◽  
Educational Objectives ◽  
Disease Treatment ◽  
Full Spectrum ◽  
Sinus Disease

Educational objectives: To have an understanding of the full spectrum of medical and surgical modalities available in the treatment of severe persisting frontal sinusitis and to understand the anatomic principles and practical aspects of the modified transnasal endoscopic Lothrop procedure using drills or “frontal drillout. “

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