Characteristics of Maxillary Sinus Ostia and Its Correlation With Anatomic Variations of the Osteomeatal Complex and Demographic Parameters (original) (raw)
Related papers
Clinical Oral Investigations, 2019
Objectives This retrospective study evaluated the visibility, location, and morphology of the primary maxillary ostium (PMO), as well as the presence and number of accessory maxillary ostia (AMO) in the maxillary sinus using cone beam computed tomography (CBCT). Materials and methods CBCT scans with a large field of view with both maxillary sinuses entirely visible, acquired from February 2016 to February 2018, were initially screened. Patients were included if there was no history of surgical intervention/trauma in the sinus region. Two observers evaluated the CBCTs for PMO and AMOs independently. PMO and AMOs were evaluated in axial, coronal, and sagittal CBCT views. In case of disagreement, a third observer served as a referee. The findings were correlated with age, gender, condition of the sinus mucosa, and status of the dentition to assess for potential influencing factors. Results A total of 184 patients (368 maxillary sinuses) were included. PMO was present and patent in 346 (94.0%) of the 368 analyzed sinuses. Most of the PMOs were located above the attachment of and in the middle third of the inferior turbinate (76.1%) and exhibited a slit shape (71.1%). An AMO was present in 167 (45.5%) of the 368 analyzed sinuses, and 66 (17.9%) sinuses had multiple AMOs. Gender and sinus mucosa morphology were found to be influencing factors for the patency of the PMO. Furthermore, gender seems to be influencing the presence of an AMO. Conclusions Most of the analyzed maxillary sinus cavities in the present population had a patent PMO. Being male and having morphological changes of the sinus mucosa were factors associated with a reduced prevalence of a patent PMO. Clinical relevance A maxillary sinus with pathological findings of the mucosa seems to have a reduced prevalence of patent PMOs. Therefore, clinicians should take care to assess any clinical and radiographical sign indicating a potential maxillary sinusitis prior to surgical interventions in this region, especially in cases with planned sinus floor elevation.
Research, Society and Development
Objective: The objective of this study was to relate the sinus ostium diameter with four known changes in the maxillary sinuses by means of cone beam Computed Tomography (CBCT), considering side and gender. Methodology: 415 CBCT scans were evaluated and a total of 328 CBCT scans from patients over 21 years of age were selected for the study. By means of corrected coronal reconstructions in positioning, an anteroposterior scan of the maxillary sinus region was performed to identify, locate, and measure the diameter of the sinus ostium on the right and left sides. Changes in the maxillary sinuses were considered: thickening of the sinus membrane, antral pseudocyst, partial veiling of the maxillary sinus and total veiling of the maxillary sinuses. Results: There was an influence of sex in the presence of sinus alterations, because in the sample, the odds (odds ratio) of men to have any sinus alteration was 2.44 times (p = 0.0002) greater than in women. In general, regardless of gender,...
Anatomical Variations of Accessory Maxillary Sinus Ostium: An Endoscopic Study
International Journal of Anatomy and Research
There has been a significant shift from external and headlight sinus surgery to functional endoscopic sinus surgery (FESS) in the past quarter century. Therefore understanding of anatomical variations of Accessory Maxillary Ostium(AMO) becomes essential for an endoscopic sinus surgeon to differentiate it from the natural ostium for safe and efficacious surgery in this region. AIM: To note the presence and anatomical variations of AMO that predisposes to recurrent sinusitis and headache. Materials and Methods: Material for the present study consisted of 100 adult patients(58 males&42 females) in the age group of 22 to 72 years old, selected from OPD of Chikitsa ENT hospital, Amritsar. Systematic nasal endoscopy was done and the shape, size, location, number and laterality of AMO was noted. Results: Among 100 subjects(200 half sides) AMO was found in 42(21%) halves, 33(78.57%) were found in anterior nasal fontanelle(ANF), 7(16.66%) in posterior nasal fontanelle (PNF)and 2(4.76%) in hiatus semilunaris(HS). These ostia were circular in 34(80.95%) halves and oval in 8(19.04%) halves. Regarding position, those situated in ANF and HS were placed in horizontally while those lying in PNF were vertically. Out of 42(21%) halves, unilateral AMO was present in 36(85.71%) halves, bilateral in 6(14.28%) halves and double in 14(33.33%). whereas single in 28(66.66%) halves. Conclusions: Each sinus cavity has a specific drainage point/ostium through which normal mucociliary clearance is channeled. The endoscopic sinus surgeons must have a detailed knowledge of anatomical variations of AMO in any interventional maxillary sinus surgery to gain maximum result(restoring normal function) with minimal trauma and morbidity.
2018
ÖZ Objective: Maxillary sinus ostium is the top section of the medial wall the and is hence poorly placed from the point of view of free drainage; it opens into the narrow ethmoidal infundibulum, inflammation of which can further break drainage, so this may cause in the development of chronic maxillary sinusitis. This study aims to evaluate maxillary sinus pathologies (MSP) and their possible relation with maxillary sinus ostium dimensions. Material and Methods: Cone Beam Computed Tomography (CBCT) scans which belong to 139 patients (52 male and 87 female) were retrospectively evaluated with regard to ostium dimensions and the presence of MSP including retention cyst and mucosal thickening. Independent Samples t-test and Pearson Chi-Square were used to for statistical analysis. Results: No statistically significant difference was observed between patients with and without MSP in terms of ostium width (p=0.13). While the mean ostium width was 2.08 mm in the patient with MSP it was me...
Maxillary sinus ostium assessment: A CT study
The Egyptian Journal of Radiology and Nuclear Medicine, 2018
To assess the maxillary sinus ostium (MSO) dimension and measuring the distance to nearby anatomical structures in adults using multi-slice computed tomography (MSCT). Patients and methods: Paranasal CT scans of asymptomatic adults without paranasal sinuses or nasal pathology were included. Axial CT with coronal reformatted images was done for all subjects to get delicate details. Results: In 86 subjects (172 sides), the width of MSO ranged from 1 to 11 mm and distance from the MSO to the anterior maxillary wall (toward nasolacrimal duct) ranged from 7 to 25 mm. While the distance from MSO to the posterior maxillary wall (toward sphenopalatine artery) ranged from 2 to 18 mm. MSO was found above orbital floor level in 74%, at the orbital floor level in 12% and below this level in 13% of our cases. Distance from MSO to the floor of maxilla ranged from 15 to 40 mm (mean = 28.6 ± 6.7). MSO was detected in the posterior third of medial maxillary wall in 47%, in middle third in 32% and the anterior third in only 21%. Anteroposterior diameter of maxillary sinus ranged from 18 to 41 mm. Its horizontal diameter ranged from 10 to 35 mm and its height ranged from 15 to 45 mm. For all measurements of the maxillary sinus and MSO, the differences between right and left side were non-significant. Conclusion: This work describes in details MSO measurements using MSCT and measures the distance from the MSO to the beyond adjacent anatomical structures in the all directions.
Imaging Science in Dentistry
Purpose: The objective of this study was to evaluate the amount of height available for a maxillary sinus augmentation procedure without blocking the ostium and jeopardizing the drainage of the ostiomeatal complex using cone-beam computed tomography (CBCT) imaging. Materials and Methods: A total of 200 sinonasal complexes comprising 100 dentate and 100 edentulous scans were retrospectively assessed using CBCT. Invivo 5.0, a CBCT reconstruction program, was used for image evaluation. The coronal section demonstrating the ostiomeatal complex was selected as a reference view to perform measurements of the sinus. The measurements were done by 2 evaluators in separate sessions. Comparative analyses of measurements were performed between dentate and edentulous patients and between male and female patients. Results: The safe height to which the sinus can be elevated without compromising the integrity of the ostiomeatal complex was calculated for each sinus. In the presence of significant mucosal thickening, the height available for augmentation was calculated by subtracting the height of mucosal thickening from the sinus floor to the location of the ostium. In this study, the available height was approximately 27.05 mm for dentate and 23.40 mm for edentulous patients. The inter-operator reliability was excellent for all the parameters evaluated. Conclusion: This retrospective study with a limited number of patients from a single university-based site shows that CBCT is valuable in evaluating the location and patency of the ostium for planning sinus augmentation procedures for dental implant placement.
“M” line: New anatomical landmark for the maxillary sinus natural ostium
Clinical Otolaryngology, 2020
Objective: Describe a reliable anatomical landmark that can be used to locate the maxillary sinus natural ostium (MSNO) during endoscopic surgery, even if the uncinate process is preserved. Design: Descriptive anatomical. Setting: An anatomical and radiological study was performed to evaluate the consistency of the landmark, denominated "M" line. Subjects and Methods: Dissections were performed in 57 cadaver heads (114 sides). In addition, 73 computerized tomography (CT) scans (146 sides) of patients with chronic inflammatory sinonasal disease were analyzed using a three-dimensional (3D) reconstruction computer program. Results: The "M" line crossed the MSNO in 112 dissected sides (98.2%) and 140 sides at CT 3D reconstruction (95.9%). Conclusion: The "M" line is a reliable anatomical landmark for predicting MSNO location. As such, it could improve and facilitate endoscopic sinus surgery, using traditional, minimally invasive or uncinate preserving techniques.
Linear and volumetric assessment of the maxillary sinus
Scripta Scientifica Medicinae Dentalis, 2016
INTRODUCTION: Pneumatization of the maxillary sinus can be triggered throughout a patient's life. Prior to any sinus floor augmentation procedure, it is imperative to conduct a linear and volumetric assessment of the maxillary sinus.
Clinical Implant Dentistry and Related Research, 2018
Background: Complications arising from sinus floor elevation (SFE) with lateral approach surgery can be avoided by means of maxillary sinus examination in the preoperative period. Purpose: To investigate anatomical variations in the maxillary sinus by making use of cone beam computed tomography (CBCT) in terms of SFE with a lateral approach. Materials and Methods: Two hundred twenty eight maxillary sinuses in 114 patients were included. Parameters such as the position and diameter of the posterior superior alveolar artery (PSAA) canal, the frequency and localization of the septa or accessory maxillary ostium (AMO), and lateral wall thickness values were subjected to statistical analysis. Results: Septa were observed in 35.1% of sinuses. The majority of septa were determined in the middle region (48.8%). Additionally, 71.1% of PSAA canals were intraosseous, generally exceeding 1 mm in diameter (68.9%). The shortest mean perpendicular distance between the sinus floor and the PSAA canal was determined in the first molar region (9.22 AE 5.66 mm). Similarly, the highest mean sinus lateral wall thickness was determined in the first molar region, in the area 3 mm distant from the sinus floor (2.42 mm AE 0.88 mm). AMO was detected in 40.8% of sinuses. Conclusion: CBCT-guided treatment planning may be beneficial prior to SFE procedures in order to avoid surgical complications.
Research Square (Research Square), 2020
Background-Accessory maxillary ostium (AMO) has a major role to play in the aetiology of maxillary sinusitis. Mucosal thickening is one of the key radiographic features of chronic maxillary sinusitis. The aim of this study was to establish the relation between maxillary sinus mucosal thickening (MT) and occurrence of AMO using cone beam computed tomography (CBCT). Methods-CBCT scans of 400 maxillary sinuses from the records of 200 patients who seeked various dental treatments at the University Dental Hospital, Ajman, United Arab Emirates were evaluated. The incidence, anatomical position and maximal length of accessory maxillary ostia (AMO) in the maxillary antrum were reviewed using CBCT by two examiners. The association between MTs and AMOs were also analysed. Results-AMOs were found in 142 maxillary antra (35.5%). The inter-observer reliability for using CBCT to detect AMO was (k=0.83). There was no signi cant difference in the frequency of AMOs when the age (P=0.19) and gender (P=0.54) distribution were considered. Sinuses with AMOs, showed signi cantly greater frequency of MTs (p=0.001). AMOs with maximal length of less than 1mm were most commonly observed (51.40 %). AMOs with larger greater maximal length were associated with higher degrees of MT. The location of the AMOs, were not affected by the degree of MT. Conclusion-The study demonstrates a clear association between degree of MT and occurrence of AMO in the maxillary sinus. There is a greater probability of nding an AMO in the maxillary sinus if the MT in the sinus is more than 3 mm.