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作者首次运用水平向连续截面技术对根尖标本进行了解剖研究。 材料和方法 选择上颌中切牙、侧切牙和尖牙各30个,患者年龄11～73岁。所有牙齿均有牙周病、咬合正常,但无根尖周病。 为研究根尖和根尖孔之间的距离差,按照Fujita法则,在牙颈部与牙长轴垂直方向上截去牙冠,将牙根固定于磨光盘上,牙长轴垂直于磨光盘平面。从根尖起连续磨除牙根,每次50μm厚。每次的打磨面均以0.1％甲酚紫液染色,体视显微镜下观察并拍照。用带有图形测量程序的数字转换器计算所有数据。被测的
For the first time, the authors used the horizontal continuous cross-section technique to dissect apical specimens. Materials and Methods 30 maxillary central incisor, lateral incisor and canine were selected. The patients were 11-73 years old. All teeth have periodontal disease, bite normal, but no periapical disease. To study the difference in distance between apical and apical foramen, according to the Fujita’s law, the crown is truncated perpendicular to the long axis of the dental arch, the root is fixed on the polishing disc, and the long axis of the tooth is perpendicular to the plane of the polishing disc . Roots from the roots of grinding teeth, each 50μm thick. Each polished surface was 0.1% cresyl violet staining, observed under a stereo microscope and photographed. All data is calculated using a digitizer with a graphing program. Measured