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为更好地对种植义齿作术前诊断和制定治疗方案,学者们推荐了许多先进的影像技术(如平片体层摄影。CT等)来精确地测量颌骨垂直向和水平向骨量,并确定牙种植体的位置。有学者则认为全景横切面体层摄影角度较窄,用于诊断价值不大。故作者对此进行了重新评价。 材料和方法 3副部分无牙的人尸下颌骨,于每副下颌骨上,在颏孔和升支之问确定3个可能的种植体位置,并以蜡将正畸弓阻挡管固定在牙槽嵴上,作为标记。每个位置用两个不同的全景X线机进行拍照(OP100’s Ortho Trans和PM2002CC’s),然后在透明醋酸纸上描出下颌轮廓、骨皮质厚度、下颌管位置;在设计好的位置做标记,并切开下颌骨。用游标卡尺测量下颌骨实物和描图上之总下颌高度、下颌管最上缘至牙槽嵴距离,下颌骨最下缘骨皮质厚度,然后进行对比
In order to better preoperative diagnosis of denture and treatment plan, scholars have recommended many advanced imaging techniques (such as plain film tomography, CT, etc.) to accurately measure the vertical and horizontal bone mass of the jaw, And determine the location of dental implants. Some scholars believe that panoramic cross-sectional tomography angle is narrow, not for diagnostic purposes. Therefore, the author conducted a re-evaluation. MATERIALS AND METHODS Section 3 Toothless human corpse mandible, on each mandible, three possible implants were located between the mental foramen and ascending branch, and wax was used to secure the orthodontic arch blocking tube to the tooth Groove ridge, as a marker. Each location was photographed using two different panoramic X-ray machines (OP100’s Ortho Trans and PM2002CC’s), and the jaw contour, cortical bone thickness, and mandibular canal depth were recorded on clear acetate paper; marked at the designed location and cut Open the jawbone. The vernier caliper was used to measure the total mandibular height of the mandible and tracings, the distance between the uppermost edge of the mandibular canal and the alveolar ridge, and the cortical bone thickness at the lowest end of the mandible, and then compared