Rydén H, Elisasson S
Swed Dent J. 1982;6(4):157-64.
An investigation was performed on 10 patients with advanced periodontal disease. A 3-step periodontal-orthodontic--occlusal therapy was performed followed by programmed plaque-control and professional tooth-cleaning. A longitudinal radiographic study was performed over a period of two years using an Eggen filmholder in combination with individual interocclusal acrylic indices. Measurements of tooth length and alveolar bone height were made using compasses and a transverse scale. An additional registration of bone height was made with a calibrated magnifier. In order to evaluate the precision of registrations a photogrammetric study was carried out using a stereo-comparator. The precision of tooth length and bone height measurements varied between 0.12-0.36 mm. No significant loss of alveolar bone was found during the two year study.
对10例晚期牙周病患者进行了调查。采用三步牙周正畸咬合治疗，随后进行程序化菌斑控制和专业牙齿清洁。使用埃根胶片夹结合个体间牙合丙烯酸指数，进行了为期两年的纵向影像学研究。使用圆规和横向标尺测量牙齿长度和牙槽骨高度。用校准放大镜对骨高度进行额外记录。为了评估记录的精度，使用立体比较仪进行了摄影测量研究。牙齿长度和骨高度测量的精度在0.12 - 0.36毫米之间。在两年的研究中未发现牙槽骨有明显丢失。
