“…2 ). A line crossing the anterior nasal spine and the nasal septum was used as a vertical reference plane in the coronal view [ 9 , 10 , 17 ]. Fig.…”
Section: Methodsmentioning
confidence: 99%
“…The CBCT assessments were performed by a calibrated examiner (KAAA) with an intra-examiner coefficient k > 0.9 for all variables. The intra-reproducibility of the measurements was facilitated using well-defined landmarks for all patients [ 9 , 10 , 17 ]. Two measurements were made for each variable, and mean values were calculated.…”
Background: After sinus floor augmentation, a thickening of the sinus mucosa has been described. The aim of the present study was to evaluate the involvement of the maxillary sinus ostium in the edematous processes after a sinus floor augmentation procedure. Methods: Seventy-two cone-beam computerized tomographies (CBSTs) were taken before sinus floor augmentation and after 1 week and 9 months from surgery and analyses. Sinus mucosa thickness and area, ostium diameter and patency, and extension of the post-surgical transient mucosal thickening in relation to the ostium were evaluated on the CBCTs for all three periods. The term "virtual" when referring to sinus mucosa thickness and area was introduced because of the edema and bleeding that both contributed to a transient thickening and additional elevation of the sinus mucosa. Results: The mean virtual thickness of the sinus mucosa was 2.7 ± 4.0 mm, 7.7 ± 7.1 mm, 1.7 ± 2.0 mm before surgery, and after 1 week and 9 months. The virtual mucosa area was 37.2 ± 52.5 mm 2 , 184.5 ± 153.8 mm 2 , and 34.0 ± 50.7 mm 2. The ostium diameter at the three periods evaluated was 1.8 ± 0.5 mm, 1.1 ± 0.6 mm, 1.5 ± 0.8 mm, respectively. Three infundibula (4.2%) were found out of patency before surgery while this number increased to 14 (19.4%) after 1 week. Nine months after surgery, only one infundibulum (1.4%) was out of patency, however, without presenting signs of sinus pathologies. The extension of the mucosal edema on the palatal sinus was reduced after 9 months of healing. Conclusions: One week after sinus floor augmentation, the maxillary sinus mucosa increased in dimensions and in several cases involved the ostium, reducing its diameter and producing a transient loss of patency. After 9 months of healing, the initial conditions were recovered.
“…2 ). A line crossing the anterior nasal spine and the nasal septum was used as a vertical reference plane in the coronal view [ 9 , 10 , 17 ]. Fig.…”
Section: Methodsmentioning
confidence: 99%
“…The CBCT assessments were performed by a calibrated examiner (KAAA) with an intra-examiner coefficient k > 0.9 for all variables. The intra-reproducibility of the measurements was facilitated using well-defined landmarks for all patients [ 9 , 10 , 17 ]. Two measurements were made for each variable, and mean values were calculated.…”
Background: After sinus floor augmentation, a thickening of the sinus mucosa has been described. The aim of the present study was to evaluate the involvement of the maxillary sinus ostium in the edematous processes after a sinus floor augmentation procedure. Methods: Seventy-two cone-beam computerized tomographies (CBSTs) were taken before sinus floor augmentation and after 1 week and 9 months from surgery and analyses. Sinus mucosa thickness and area, ostium diameter and patency, and extension of the post-surgical transient mucosal thickening in relation to the ostium were evaluated on the CBCTs for all three periods. The term "virtual" when referring to sinus mucosa thickness and area was introduced because of the edema and bleeding that both contributed to a transient thickening and additional elevation of the sinus mucosa. Results: The mean virtual thickness of the sinus mucosa was 2.7 ± 4.0 mm, 7.7 ± 7.1 mm, 1.7 ± 2.0 mm before surgery, and after 1 week and 9 months. The virtual mucosa area was 37.2 ± 52.5 mm 2 , 184.5 ± 153.8 mm 2 , and 34.0 ± 50.7 mm 2. The ostium diameter at the three periods evaluated was 1.8 ± 0.5 mm, 1.1 ± 0.6 mm, 1.5 ± 0.8 mm, respectively. Three infundibula (4.2%) were found out of patency before surgery while this number increased to 14 (19.4%) after 1 week. Nine months after surgery, only one infundibulum (1.4%) was out of patency, however, without presenting signs of sinus pathologies. The extension of the mucosal edema on the palatal sinus was reduced after 9 months of healing. Conclusions: One week after sinus floor augmentation, the maxillary sinus mucosa increased in dimensions and in several cases involved the ostium, reducing its diameter and producing a transient loss of patency. After 9 months of healing, the initial conditions were recovered.
“…Otros autores, señalan que hay una gran variabilidad individual del espesor de la mucosa de Schneiderian con valores que oscilan entre 0.16 (mínimo) y 34.61 (máximo). Además, los valores promedios de las medidas evaluadas en diferentes zonas del seno maxilar, fueron de 0.52 y 1.41mm 2,10,17,18,19 . La vecindad de las raíces de los dientes explica las numerosas anastomosis de vasos sanguíneos y linfáticos de la región dentaria y de la mucosa sinusal, mecanismos que favorecen a la propagación de las infecciones odontogénicas en el seno maxilar, sumada a la porosidad del hueso maxilar que permite la difusión de patógenos y sus productos en el piso sinusal 5 .…”
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.
“…Implant surgery involves performing a surgical procedure for a missing tooth 2 . Severe loss of alveolar bone necessitates the use of bone grafting and maxillary sinus floor augmentation procedures for the maxilla 3 . However, maxillary sinus floor augmentation frequently leads to complications such as perforation in the inferior part of the maxillary sinus, excessive bleeding, and hematoma 4,5 .…”
mentioning
confidence: 99%
“…However, maxillary sinus floor augmentation frequently leads to complications such as perforation in the inferior part of the maxillary sinus, excessive bleeding, and hematoma 4,5 . Hence, dental radiographs have been used to analyze the anatomical structure of the inferior part of the maxillary sinus, including to predict the prognosis of implant surgery 3,[6][7][8][9][10][11][12][14][15][16] . However, it is difficult to differentiate between the maxillary sinus floor and the Schneiderian membrane on radiographs 7 .…”
The maxillary sinus is the largest of the four paranasal sinuses in humans, and its close proximity to the teeth means that caution is required during dental treatment. In particular, implant surgeries involving the maxillary posterior teeth should include evaluating the inferior part of the maxillary sinus. The purpose of this study is to evaluate the differences by comparing the inferior part of the maxillary sinus based on the nasal cavity floor (NCF) between patients (male 30, female 30) genders through the use of the three-dimensional (3-D) program that can facilitate 3-D visualizations. The present study results obtained from 3-D visualizations using cone beam computed tomography (CBCT) data showed that the inferior part of the maxillary sinus was mostly larger in males than in females. In addition, the utilization of 3-D visualization data was more likely to assure accuracy than when using data obtained by two-dimensional (2-D) imaging. Therefore, 3-D visualizations of the inferior part of the maxillary sinus will contribute to accurate analyses of its anatomical structure during implant surgery and other operations. Further studies utilizing 3-D visualization will yield useful fundamental data and guidelines for future research.
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