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

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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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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