Lindh C, Nilsson M, Klinge B, Petersson A
Department of Oral Radiology, Lund University, Malmõ, Sweden.
Dentomaxillofac Radiol. 1996 Jun;25(3):146-50. doi: 10.1259/dmfr.25.3.9084263.
To evaluate the potential use of quantitative computed tomography (QCT) for the assessment of bone mineral density of the edentulous mandible prior to implant placement.
Ten 2 mm thick CT slices of anterior and posterior edentulous sections from 15 mandibles were obtained perpendicular to the buccal and lingual plates. The bone mineral density, expressed as the amount of calcium hydroxyapatite (mg cm-3) of the trabecular bone, was calculated using a method that takes into account the influence of fat.
The variation of bone mineral density between mandibles was high. Anterior sections showed higher values than posterior sections and a variation was found within sections of the same mandible.
CT provides a site-related measure of the bone mineral density in the mandible and appears potentially useful as a non-invasive method to determine a parameter that may reflect bone quality prior to implant placement.
评估定量计算机断层扫描（QCT）在种植体植入前评估无牙下颌骨骨密度方面的潜在用途。
从15例下颌骨获取垂直于颊侧和舌侧板的无牙前、后节段的10个2mm厚的CT切片。使用一种考虑脂肪影响的方法计算骨密度，以小梁骨中羟基磷灰石钙的含量（mg/cm³）表示。
下颌骨之间的骨密度变化很大。前部切片的值高于后部切片，并且在同一下颌骨的切片内也发现了变化。
CT提供了下颌骨骨密度的部位相关测量值，并且作为一种非侵入性方法来确定一个可能反映种植体植入前骨质量的参数似乎具有潜在用途。
