Chifor Radu, Hedeşiu Mihaela, Bolfa Pompei, Catoi Cornel, Crişan Maria, Serbănescu Andreea, Badea Alexandru F, Moga Ioana, Badea Mîndra Eugenia
Preventive Dentistry Department, University of Medicine and Pharmacy Iuliu Hatieganu, Cluj-Napoca, Romania.
Med Ultrason. 2011 Jun;13(2):120-6.
To identify by ultrasonography (DermaScan C, Cortex Technology1) the reference points necessary to monitor the horizontal bone resorbtion and to assess the accuracy of the measurements by comparing with Cone Beam Computed Tomography images, having direct microscopic section measurements as a gold standard.
We performed the examinations on the lingual side of the alveolar bone of 4 pig mandibles. We tried to identify the enamel-cementum junction, the root, the periodontal space at the appearance of the tooth from the alveolar bone, the edge of cortical bone at its coronary limit (in order to assess the horizontal bone resorption). We measured the distance between the enamel-cementum junction and the coronal edge of cortical bone.
There was a strong positive correlation between the alveolar bone level measured with the 3 techniques. Correlation parametric R2 tests were statistically significant for DermaScan measurements compared to microscopy ones (p<0.0001). Linear regression showed statistically significant correlations for alveolar bone level measurements made by CBCT compared to microscopy (p<0.05).
The cementum-enamel junction may be identified on ultrasonic images with high accuracy according to the tooth anatomical convexities, therefore this method can be used for monitoring the periodontium.
通过超声检查（DermaScan C，Cortex Technology1）确定监测水平骨吸收所需的参考点，并通过与锥形束计算机断层扫描图像进行比较来评估测量的准确性，以直接显微镜切片测量作为金标准。
我们对4头猪下颌骨牙槽骨的舌侧进行了检查。我们试图确定釉牙骨质界、牙根、牙齿从牙槽骨中露出时的牙周间隙、皮质骨冠状边界处的边缘（以评估水平骨吸收）。我们测量了釉牙骨质界与皮质骨冠状边缘之间的距离。
用这三种技术测量的牙槽骨水平之间存在很强的正相关性。与显微镜测量相比，DermaScan测量的相关性参数R2检验具有统计学意义（p<0.0001）。线性回归显示，与显微镜测量相比，CBCT测量的牙槽骨水平具有统计学意义的相关性（p<0.05）。
根据牙齿的解剖凸度，可在超声图像上高精度地识别釉牙骨质界，因此该方法可用于监测牙周组织。
