Orthodontic Department, Cairo University, Cairo, Egypt.
Am J Orthod Dentofacial Orthop. 2010 Feb;137(2):259-65. doi: 10.1016/j.ajodo.2008.04.030.
The aim of this study was to compare the accuracy of dental measurements taken with calipers on plaster dental casts and those from computed tomography scans of the dentition with a dental measurement program.
The sample consisted of plaster dental models of 34 orthodontic subjects. Dental arch measurements, including mesiodistal widths of teeth, arch widths, arch lengths, arch perimeters, and palatal depths were made with the calipers. The patients were also scanned with computed tomography, and measurements were made digitally with a 3-dimensional-based dental measurements program (3DD, Biodent, Cairo, Egypt).
The results showed strong agreement in most measurements between the conventional method and the 3DD in the 3 planes of space. The mesiodistal measurements of the maxillary right and left second premolars, left central incisor, and right first molar, and the mandibular left and right central incisors, right canine, and left first premolar had fair agreement.
Excellent agreement between the measurements with the conventional and 3DD methods in the 3 planes of space was found; 3DD can be an alternative to conventional stone dental models.
本研究的目的是比较使用卡尺在石膏牙模上进行的牙测量值和使用牙齿测量程序对牙进行的计算机断层扫描（CT）的准确性。
该样本由 34 名正畸患者的石膏牙模型组成。使用卡尺进行牙弓测量，包括牙的近远中宽度、牙弓宽度、牙弓长度、牙弓周长和腭部深度。对患者进行 CT 扫描，并使用基于 3D 的数字测量程序（3DD，Biodent，开罗，埃及）进行数字化测量。
结果显示，在 3 个空间平面上，传统方法与 3DD 之间的大多数测量值具有很强的一致性。上颌右侧和左侧第二前磨牙、左侧中切牙和右侧第一磨牙，以及下颌左侧和右侧中切牙、右侧尖牙和左侧第一前磨牙的近远中测量值具有良好的一致性。
在 3 个空间平面上，传统方法和 3DD 方法之间的测量值具有极好的一致性；3DD 可以替代传统的石膏牙模型。
