Hohlweg-Majert Bettina, Pautke Christoph, Deppe H, Metzger Marc C, Wagner Katharina, Schulze Dirk
Department of Oral and Maxillofacial Surgery, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany.
J Oral Maxillofac Surg. 2011 Nov;69(11):2763-70. doi: 10.1016/j.joms.2011.02.076. Epub 2011 Jun 23.
The aim of this study was to investigate bone mass using different cone-beam computed tomographies (CBCTs) combined with image analysis and to determine whether bone quantity or quality was detected.
Different measurements recorded on mandible bones of pigs in the retromolar region were evaluated on ProMax 3D (Planmeca Oy, Finland) and the ILUMA™CT (IMTEC™ Imaging, Ardmore, OK) to calculate a calibration curve. The spatial relationships of pig mandible halves relative to adjacent defined anatomical structures were assessed by means of 3D visualization software. In addition to the screenshot, their bone quality was evaluated in accordance with the Lenkholm and Zarb classification.
The CBCT calibration curves based on the measurements taken from the ProMax and ILUMA CT showed linear correlation. Huge Hounsfield units intervals were found between the 2 CBCTs and there was no correlation with the computed tomography. Exact information on the micromorphology of the bone cylinders was not available. A subjective correlation according to Lenkholm and Zarb showed overlapping in all groups.
CBCT is a good choice for analyzing bone mass. However, it does not provide any information on bone quality. To obtain information on the microarchitecture of the spongiosa, it is necessary to use a computed tomography with finite element analysis.
本研究旨在使用不同的锥形束计算机断层扫描（CBCT）结合图像分析来研究骨量，并确定是否能检测到骨的数量或质量。
在ProMax 3D（芬兰普兰梅卡公司）和ILUMA™CT（IMTEC™成像公司，美国俄克拉何马州阿德莫尔）上评估在猪下颌磨牙后区记录的不同测量值，以计算校准曲线。借助三维可视化软件评估猪下颌骨两半相对于相邻定义解剖结构的空间关系。除了屏幕截图外，还根据Lenkholm和Zarb分类评估其骨质量。
基于从ProMax和ILUMA CT获取的测量值的CBCT校准曲线显示出线性相关性。在两种CBCT之间发现了巨大的亨氏单位间隔，并且与计算机断层扫描没有相关性。无法获得关于骨圆柱体微观形态的准确信息。根据Lenkholm和Zarb的主观相关性显示所有组均有重叠。
CBCT是分析骨量的一个不错选择。然而，它不能提供任何关于骨质量的信息。为了获得关于松质骨微结构的信息，有必要使用带有有限元分析的计算机断层扫描。
