Flanagan Dennis
J Oral Implantol. 2008;34(5):256-8. doi: 10.1563/0.915.1.
Edentulous ridges suitable for implant treatment depend on cortical bone for implant stability, especially for ridge-expansion procedures. This study was done to find and compare the actual thicknesses of the facial and lingual edentulous cortices of the maxilla and mandible as measured on computerized tomograms. The collected computerized tomographs (CT) of one implantologist's practice (D.F.) were measured. The measurements taken demonstrated that the edentulous lingual cortex is almost always thicker than the facial cortex in the maxilla and mandible. The combined maxillary and mandibular facial cortices measurement sites average was 1.79 mm. The combined maxillary and mandibular lingual cortices measurement sites average was 2.33 mm. The average cortical thickness measurement of the maxillary facial cortices was 1.66 mm. The lingual maxillary average was 2.16 mm. The mandibular facial cortical sites averaged 1.83 mm, while the lingual cortical sites were 2.40 mm. These data confirm that the lingual cortex of the maxilla and mandible is thicker than the facial cortex at a ratio of 1:1.3. This ratio was consistent for maxilla and mandible.
适合种植治疗的无牙颌牙槽嵴依赖皮质骨来实现种植体稳定，尤其是在牙槽嵴扩展手术中。本研究旨在通过计算机断层扫描来测量并比较上颌骨和下颌骨无牙颌面部及舌侧皮质骨的实际厚度。对一位种植医生（D.F.）收集的计算机断层扫描（CT）图像进行测量。测量结果显示，在上颌骨和下颌骨中，无牙颌舌侧皮质骨几乎总是比面部皮质骨厚。上颌骨和下颌骨面部皮质骨测量部位的平均厚度为1.79毫米。上颌骨和下颌骨舌侧皮质骨测量部位的平均厚度为2.33毫米。上颌骨面部皮质骨的平均厚度测量值为1.66毫米。上颌骨舌侧平均厚度为2.16毫米。下颌骨面部皮质骨部位平均厚度为1.83毫米，而舌侧皮质骨部位为2.40毫米。这些数据证实，上颌骨和下颌骨的舌侧皮质骨比面部皮质骨厚，比例为1:1.3。该比例在上颌骨和下颌骨中是一致的。
