- 作者：Michael M. Bornstein ; PD Dr. med. dent.&lowast ; ; michael.bornstein@zmk.unibe.ch" class="auth_mail" title="E-mail the corresponding author ; Joelle Wasmer&dagger ; ; Pedram Sendi ; PD Dr. med. ; Dr. med. dent.&Dagger ; ; Simone F.M. Janner ; Dr. med. dent.&lowast ; ; Daniel Buser ; Prof. Dr. med. dent.&lowast ; ; Thomas von Arx ; Prof. Dr. med. dent.&lowast ;
- 关键词：Apical lesion ; apical surgery ; cone beam computed tomography ; maxillary molars ; maxillary sinus ; Schneiderian membrane
- 刊名：Journal of Endodontics
- 出版年：2012
- 出版时间：January 2012
- 年：2012
- 卷：38
- 期：1
- 页码：51-57
- 全文大小：650 K
Methods
This controlled study included 2 cohorts of patients (n = 50 for each group). For patients in group 1 (with apical pathology), 3 measurements in millimeters were performed using coronal and sagittal CBCT slices: the dimension of the apical lesion in the axis of the root, the width of the cortical bone in the axis of the root, and the thickness of the Schneiderian membrane perpendicular to the underlying cortical bone. For the analysis of CBCT scans of group 2 (without apical pathologies), 2 measurements were performed using coronal and sagittal CBCT slices: the width of the cortical bone in the axis of the root and the thickness of the Schneiderian membrane perpendicular to the underlying cortical bone.
Results
For group 1, the periapical lesions evaluated measured between 0.27 and 7.41 mm in diameter, the apical bone separating the apical lesions from the maxillary sinus ranged from 0.13 to 7.83 mm, and the dimensions of the Schneiderian membrane ranged from 0.25 to 13.98 mm. The apical bone was generally thicker in patients with periapical lesions. Regarding the dimensions of the Schneiderian membrane, the values were statistically significantly higher for the patients in group 1 compared with group 2.
Conclusions
The study showed that the Schneiderian membrane in the vicinity of roots with apical lesions tends to be significantly thicker when compared with the roots of teeth without apical pathoses.