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

2016 ◽  
Vol 27 (11) ◽  
pp. 1454-1461 ◽  
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

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

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.

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

2016 ◽  
Vol 40 (5) ◽  
pp. 944-952 ◽  
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.

scholarly journals Morphological Characteristics of the Cysts of the Maxillary Sinuses

2021 ◽  
pp. 3-10
Author(s):  
Khasanov U.S. ◽  
◽  
Djuraev J.A. ◽  
Vokhidov U.N. ◽  
Botirov A.J. ◽  
...  
Keyword(s):  
Maxillary Sinus ◽  
Morphological Changes ◽  
Morphological Characteristics ◽  
Diagnostic Methods ◽  
Periapical Lesions ◽  
Maxillary Sinus Floor ◽  
Sinus Floor ◽  
Exact Size ◽  
Sinus Mucosa ◽  
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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