Morphological Characteristics of the Cysts of the Maxillary Sinuses

Today, there are several diagnostic methods that allow you to determine the exact size and nature of periapical formations. In addition, there are studies that describe the thickening of the sinus mucosa in patients with periapical lesions and show a causal relationship. Objectives: This study was to study the morphological changes in the cysts of the maxillary sinus. Methods: 50 patients with maxillary sinus cysts were evaluated. A total of 50 maxillary sinuses (13 men and 12 women) were analyzed taking into account changes in density in the sinus cavity. The thickening of the sinus mucosa and periapical lesions was measured in the caudal-cephalic direction. The axial and sagittal axes were taken as a basis on the sagittal and coronal sections. The presence of opacities was not directly related to periapical lesions. Conclusions. Lesions of the maxillary sinus floor have been associated with chronic periapical lesions larger than 4 mm. Clouding or thickening of the sinus mucosa was not associated with periapical lesions.

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Influence of Anatomical Parameters on the Dimensions of the Subantral Space and Sinus Mucosa Thickening after Sinus Floor Elevation. A Retrospective Cone Beam Computed Tomography Study

Dentistry Journal ◽

10.3390/dj9070076 ◽

2021 ◽

Vol 9 (7) ◽

pp. 76

Author(s):

Yuki Omori ◽

Yasushi Nakajima ◽

Hideki Imai ◽

Daichi Yonezawa ◽

Mauro Ferri ◽

...

Keyword(s):

Cone Beam ◽

Sinus Floor Elevation ◽

Axis Parallel ◽

Height Gain ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Maxillary Sinus Floor Elevation ◽

Sinus Mucosa ◽

Anatomical Parameters ◽

Maxillary Sinuses

Background: Various anatomical parameters might influence the surgical approach for maxillary sinus floor elevation. The objective of the present study was to retrospectively evaluate the influence of anatomical parameters on the dimensions of the subantral space and of the sinus mucosa thickening after sinus floor elevation. Material and Methods: Seventy-eight maxillary sinuses in sixty-five patients were evaluated on cone beam computed tomographies taken before surgery and after one week (t1w) and nine months (t9m). Several parameters such as the distance XF between an axis parallel to the base of the nose (X-axes) and the sinus floor (F) were correlated with the height gain (IF) at t1w and t9m and the post-surgical edema. Results: A weak significant positive correlation was observed between height gain vs. sinus height of interest (XF), the balcony, and the sinus floor angle. The post-surgical edema was influenced by the initial mucosa thickness and the xenograft used. Conclusions: Various parameters might affect height gain and sinus mucosa thickening after sinus floor elevation. The height of interest, the balcony, and the sinus floor angle showed significant correlations with height gain. The initial thickness of the mucosa and the biomaterial used influenced the post-surgical edema.

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Goat Model for Direct Visualizing the Effectiveness of Detaching Sinus Mucosa in Real Time During Crestal Maxillary Sinus Floor Elevation

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-16-00102 ◽

2017 ◽

Vol 43 (4) ◽

pp. 247-253

Author(s):

Jiadong Fan ◽

Pin Hu ◽

Yanfeng Li ◽

Fuli Wang ◽

Xinming Dong ◽

...

Keyword(s):

Maxillary Sinus ◽

Real Time ◽

Ex Vivo ◽

Sinus Lift ◽

Sinus Floor Elevation ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Maxillary Sinus Floor Elevation ◽

Sinus Mucosa ◽

Space Volume

The procedure of crestal maxillary sinus floor elevation presents a great challenge to the field of implant dentistry. Due to the limited visualization in this procedure, the effectiveness of detaching sinus mucosa could not be assessed in real time. We recently developed an ex vivo goat sinus model by cutting the goat residual skulls along four lines determined from computerized tomography (CT) scans, extracting the maxillary premolar or molar teeth, and preparing implant socket in the maxilla. The generated ex vivo goat sinus models exposed the maxilla and the whole maxillary sinus mucosa, thus enabling real-time observation of detaching maxillary sinus mucosa via directly visualizing the working situation of sinus lift tool in the models and directly measuring the length of detached mucosa and space volume generated under the elevated sinus mucosa. One commercially available umbrella-shaped sinus lift curette was used to detach the maxillary sinus mucosa to evaluate the effectiveness of the ex vivo goat sinus models. The results showed that this curette could detach the sinus mucosa 3.75 mm in length in the mesiodistal direction and 2.81 mm in the buccal-palatal direction. Moreover, a space volume of 52.7 μl could be created under the elevated sinus mucosa in the goat ex vivo models. All the experimental results suggested that this ex vivo goat sinus model might be useful in the evaluation of improved or newly designed sinus lift tools for elevating the maxillary sinus mucosa via the crestal approach.

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Feasibility of Shape-Memory Ni/Ti Alloy Wire Containing Tube Elevators for Transcrestal Detaching Maxillary Sinus Mucosa: Ex Vivo Study

Cellular Physiology and Biochemistry ◽

10.1159/000453152 ◽

2016 ◽

Vol 40 (5) ◽

pp. 944-952 ◽

Cited By ~ 1

Author(s):

Yanfeng Li ◽

Fuli Wang ◽

Pin Hu ◽

Jiadong Fan ◽

Yishi Han ◽

...

Keyword(s):

Shape Memory ◽

Maxillary Sinus ◽

Ex Vivo ◽

Ti Alloy ◽

Alloy Wire ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Distal Direction ◽

Sinus Mucosa ◽

Space Volume

Background: Osteotome sinus floor elevation is a less invasive approach to augment an insufficient alveolar bone at the posterior maxilla for dental implantation. However, this approach has some limitations due to the lack of sinus lift tools available for clinical use and the small transcrestal access to the maxillary sinus floor. We recently invented shape-memory Ni/Ti alloy wire containing tube elevators for transcrestal detaching maxillary sinus mucosa, and developed goat ex vivo models for direct visualizing the effectiveness of detaching sinus mucosa in real time during transcrestal maxillary sinus floor elevation. Methods: We evaluated our invented elevators, namely elevator 012 and elevator 014, for their effectiveness for transcrestal detaching maxillary sinus mucosa using the goat ex vivo models. We measured the length of sinus mucosa detached in mesial and distal directions or buccal and palatal directions, and the space volume created by detaching maxillary sinus mucosa in mesial, distal, buccal and palatal directions using the invented elevators. Results: Elevator 012 had a shape-memory Ni/Ti alloy wire with a diameter of 0.012 inch, while elevator 014 had its shape-memory Ni/Ti alloy wire with a diameter of 0.014 inch. Elevator 012 could detach the goat maxillary sinus mucosa in the mesial or distal direction for 12.1±4.3 mm, while in the buccal or palatal direction for 12.5±6.7 mm. The elevator 014 could detach the goat maxillary sinus mucosa for 23.0±4.9 mm in the mesial or distal direction, and for 19.0±8.1 mm in the buccal or palatal direction. An average space volume of 1.7936±0.2079 ml was created after detaching the goat maxillay sinus mucosa in both mesial/distal direction and buccal/palatal direction using elevator 012; while the average space volume created using elevator 014 was 1.8764±0.2366 ml. Conclusion: Both two newly invented tube elevators could effectively detach the maxillary sinus mucosa on the goat ex vivo sinus models. Moreover, elevator 014 has advantages over the elevator 012 for the capability to detach sinus mucosa.

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Tomographic Assessment on the Influence of the Placement of a Collagen Membrane Subjacent the Sinus Mucosa After Maxillary Sinus Floor Augmentation

Case Medical Research ◽

10.31525/ct1-nct03902457 ◽

2019 ◽

Author(s):

Keyword(s):

Maxillary Sinus ◽

Collagen Membrane ◽

Sinus Floor Augmentation ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Maxillary Sinus Floor Augmentation ◽

Sinus Mucosa

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Effects of a collagen membrane positioned between augmentation material and the sinus mucosa in the elevation of the maxillary sinus floor. An experimental study in sheep

Clinical Oral Implants Research ◽

10.1111/clr.12762 ◽

2016 ◽

Vol 27 (11) ◽

pp. 1454-1461 ◽

Cited By ~ 17

Author(s):

Alessandro Scala ◽

Niklaus P. Lang ◽

Joaquin Urbizo Velez ◽

Riccardo Favero ◽

Franco Bengazi ◽

...

Keyword(s):

Experimental Study ◽

Maxillary Sinus ◽

Collagen Membrane ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Sinus Mucosa

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Tomographic evaluation of the influence of the placement of a collagen membrane subjacent to the sinus mucosa during maxillary sinus floor augmentation: a randomized clinical trial

International Journal of Implant Dentistry ◽

10.1186/s40729-019-0183-5 ◽

2019 ◽

Vol 5 (1) ◽

Cited By ~ 1

Author(s):

Atsuya Hirota ◽

Niklaus P. Lang ◽

Mauro Ferri ◽

Natalia Fortich Mesa ◽

Karol Ali Apaza Alccayhuaman ◽

...

Keyword(s):

Clinical Trial ◽

Maxillary Sinus ◽

Randomized Clinical Trial ◽

Collagen Membrane ◽

Sinus Floor Augmentation ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Maxillary Sinus Floor Augmentation ◽

Sinus Mucosa

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Schneiderian membrane thickness: Cone Beam Computed Tomography analysis pre and post-sinus floor elevation procedures

Revista de la Facultad de Odontología ◽

10.25014/revfacodont271.2020.30.3.11 ◽

2020 ◽

Vol 30 (3) ◽

pp. 11-19

Author(s):

Cecilia González ◽

◽

Mario Sezin ◽

Juan C Ibañez

Keyword(s):

Computed Tomography ◽

Maxillary Sinus ◽

Cone Beam Computed Tomography ◽

Cone Beam ◽

Membrane Thickness ◽

Sinus Floor Elevation ◽

Tomographic Images ◽

Maxillary Sinus Floor ◽

Sinus Floor ◽

Sinus Mucosa

Objective: To evaluate the thickness of the maxillary sinus mucosa before and after performing the elevation of the maxillary sinus floor in partially and very edentulous patients in the posterior sector using cone beam computed tomography images. Methods: Pre and postsurgical tomographic images of 31 cases were included; 24 of which were a unilateral maxillary sinus floor elevation procedure, while 7 cases involved both pneumatic cavities. Measurements were taken at the sagittal and coronal planes. All of them, perpendicular to the sinus mucosa. A retrospective analysis of cone beam computed tomography was performed and the groups were compared with the Wilcoxon test for related samples and the variables graft size, preoperative membrane thickness, age and gender with multivariate analysis. Setting the level of statistical significance p <0.05. Results: A great variability of the thickness of the sinus membrane was confirmed, both in the pre-operative and in the post-operative. It was observed that the mean values in millimeters obtained in the pre-op were 1.45 and 1.12 in the post-op. The medians showed that the membrane thickness values are more atypical and more extreme in the preoperative values (0.79) than in the postoperative values (0.94), which are more normal and uniform. Conclusion: Under the conditions analyzed, there was an absence of changes in the dimensions of the sinus mucosa in the pre and postoperative period of the tomographic images, highlighting evidence of great inter-individual variability.

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